JP2018101275A - Vehicle width measuring device, vehicle width measuring method, and program - Google Patents

Abstract

A vehicle width measuring device, a vehicle width measuring method, and a program that can be installed even in a toll gate where installation space is limited are provided. A vehicle width measuring device includes a first light projecting unit capable of projecting first inspection light, and a first light receiving unit capable of receiving reflected light of the first inspection light. A vehicle detection unit, a vehicle detection determination unit that detects the vehicle based on the reflected light of the first inspection light, and the inspection light that is inclined toward the lane direction with respect to the width direction of the lane And a second vehicle detection unit having a light receiving unit capable of receiving reflected light of the inspection light, and specularly reflecting the inspection light projected from the light projecting unit. Based on the reflecting portion that changes the traveling direction, the first detection result that detects the reflected light from the first side surface of the vehicle, and the second detection result that detects the reflected light from the second side surface of the vehicle A vehicle width calculation unit that measures the vehicle width of the vehicle. [Selection] Figure 3

Description

  The present invention relates to a vehicle width measuring device, a vehicle width measuring method, and a program.

As an apparatus for measuring vehicle specifications of a vehicle traveling in a lane, a vehicle width measurement apparatus that acquires vehicle specifications such as a vehicle width using a pulse laser sensor is known as disclosed in, for example, Patent Document 1.
For example, at tollgates on expressways, an electronic fee is used to determine the vehicle type based on the vehicle width, which is a characteristic of the vehicle, and to communicate wirelessly with a toll resident at the tollgate or an on-board device mounted on the vehicle. There is a case where a toll is collected according to a vehicle type by a toll collection system (ETC: Electronic Toll Collection System (registered trademark), also referred to as “automatic fee collection system”). In such a toll collection facility of the toll gate, the vehicle width measuring device as described above may be provided on both sides of the lane in order to measure the width of the vehicle passing through the lane.

JP 2001-143188 A

  A conventional vehicle width measuring device has a configuration in which laser sensors for measuring a vehicle width are installed on islands provided on both sides of a lane. However, depending on the location conditions of the toll booth, there may be a case where sufficient space for installing the vehicle width measuring devices on both sides of the lane cannot be secured. For example, in a toll gate provided on a viaduct or the like, a soundproof wall or the like is provided on one side in the width direction of the lane instead of an island, and there is a case where a space for installing a vehicle width measuring device cannot be secured. In addition, the length in the lane direction may be insufficient, and it may be difficult to arrange the vehicle width measuring device as described in Patent Document 1 side by side in the lane direction.

  The present invention has been made in view of such problems, and provides a vehicle width measuring device, a vehicle width measuring method, and a program that can be installed even in a toll gate where installation space is limited.

In order to solve the above problems, the present invention employs the following means.
According to the first aspect of the present invention, the vehicle width measuring device (10) is a vehicle width measuring device that measures the vehicle width of a vehicle traveling in a lane, and the first inspection light is provided in the width direction of the lane. A first light projecting unit (E1) capable of projecting light and a first light receiving unit provided to be paired with the first light projecting unit and capable of receiving reflected light of the first inspection light Based on the first vehicle detection unit (100) having (R1) and the reflected light of the first inspection light, the vehicle passing through the lane at the vehicle detection position where the first inspection light is projected. A vehicle detection determination unit (135) for detecting a vehicle; and a second detection light that is provided on one side in the width direction of the lane and that is inclined toward the lane direction with respect to the width direction of the lane. A second light projecting portion (E2) and a second light projecting portion on one side in the width direction of the lane so as to be paired with the second light projecting portion; A second vehicle detection section (110) having a second light receiving section (R2) capable of receiving the reflected light of the inspection light; and provided on the other side in the width direction of the lane, and projected from the second light projection section. A reflection part (120) for specularly reflecting the emitted second inspection light to change the traveling direction of the second inspection light, and a plurality of reflected light detection results received by the second light receiving part A first detection result of detecting the reflected light from the first side surface of the vehicle facing the other side in the width direction of the lane through the reflecting portion, and the vehicle of the vehicle facing the one side in the width direction of the lane. A vehicle width calculation unit (130) that measures the vehicle width of the vehicle based on a second detection result of detecting reflected light from the second side surface.
By doing in this way, the vehicle width measuring apparatus can measure the vehicle width of a vehicle based on each reflected light reflected from the 1st side surface and 2nd side surface of a vehicle. In addition, the vehicle width measuring device has a compact configuration in which only the reflecting portion that regularly reflects the second inspection light is installed on the other side in the width direction of the lane, so even in a toll gate where installation space is limited It can be installed.
Further, the vehicle detection determination unit determines whether the vehicle has moved backward based on the vehicle detection result based on the reflected light of the first inspection light and the detection result of the reflected light of the second inspection light. can do. For example, a vehicle that does not have an on-board device may accidentally enter a lane that has an electronic toll collection system, and then reversely enter another lane that does not have an electronic toll collection system. . At this time, if it is not possible to detect that the vehicle has moved backward and left the lane, there is a possibility that an erroneous charging process may be performed in the electronic toll collection system. However, when the vehicle detection determination unit detects the reverse of the vehicle, it is possible to prevent an erroneous charging process from being performed in the electronic toll collection system.
Further, when the vehicle detection determination unit detects the backward movement of the vehicle, it is possible to prevent the vehicle width calculation result from being inaccurate due to the behavior of the vehicle.

According to the second aspect of the present invention, in the vehicle width measuring device according to the above aspect, the vehicle width calculation unit reflects the second inspection light from the second light projecting unit by the vehicle. A distance calculation unit (131) that calculates the flight distance of the second inspection light to the reflected position and outputs the result as a detection result of the reflected light. The vehicle width calculation unit detects the smallest value among detection results in which the distance from the second light projecting unit to the reflection position is greater than the distance from the second light projecting unit to the reflective unit. The result is specified as the first detection result, and the distance from the second light projecting unit to the reflection position is the smallest among the detection results smaller than the distance from the second light projecting unit to the reflection unit. A detection result having a small value is specified as the second detection result.
By doing in this way, the vehicle width calculation unit is based on the distance from the second light projecting unit to the reflecting unit and the distance from the second light projecting unit to the reflection position on the vehicle. It is possible to select a first detection result indicating a detection result of reflected light reflected from one side surface and a second detection result indicating a detection result of reflected light reflected from the second side surface of the vehicle. .

According to a third aspect of the present invention, in the vehicle width measuring device according to the above aspect, the second light projecting unit emits the second inspection light so as to intersect the vehicle detection position on the lane. The vehicle width calculation unit acquires the flight distance of the second inspection light calculated by the distance calculation unit when the vehicle detection determination unit detects the vehicle as a third detection result, The distance calculation unit calculates the distance from the second light projecting unit measured in advance to the position where the second inspection light and the vehicle detection position intersect with the third detection result. An error calculation unit (133) that calculates a measurement error of the flight distance of the second inspection light is further included.
By doing in this way, the error calculation unit is configured to calculate the distance from the second light projecting unit measured in advance to the position where the second inspection light and the vehicle detection position intersect, and the second calculated by the distance calculation unit. By comparing the distance from the light projecting unit to the position where the second inspection light and the vehicle detection position intersect, the measurement error of the flight distance of the second inspection light calculated by the distance calculation unit can be calculated. The vehicle width calculation unit can improve the accuracy of the measurement result of the vehicle width by measuring the vehicle width of the vehicle in consideration of the measurement error.

  According to a fourth aspect of the present invention, a vehicle width measuring method for measuring a vehicle width of a vehicle traveling in a lane includes a first light projecting step of projecting a first inspection light in the width direction of the lane. A second light projecting step for projecting the second inspection light from one side in the width direction of the lane and projecting the second inspection light with respect to the width direction of the lane; and reflection of the first inspection light A first light receiving step for receiving light; a second light receiving step for receiving reflected light of the second inspection light on one side in the width direction of the lane; and a second light receiving step on the other side in the width direction of the lane. Based on the reflection step of changing the traveling direction of the second inspection light by specularly reflecting the second inspection light projected in the second projection step, and the reflected light of the first inspection light, The vehicle passing through the lane at a vehicle detection position where the first inspection light is projected Vehicle detection determination step for detecting the first side surface of the vehicle facing the other side in the width direction of the lane through the reflection step among a plurality of detection results of the reflected light received in the second light receiving step Based on a first detection result of detecting reflected light from the vehicle and a second detection result of detecting reflected light from the second side surface of the vehicle facing one side in the width direction of the lane. A vehicle width calculation step for measuring the width.

  According to the fifth aspect of the present invention, the first light projecting unit capable of projecting the first inspection light in the width direction of the lane, and the first light projecting unit are provided to be paired, A first vehicle detection unit having a first light receiving unit capable of receiving reflected light of the first inspection light; and provided on one side in the width direction of the lane and facing the lane direction with respect to the width direction of the lane. And a second light projecting unit capable of projecting the second inspection light by tilting and the second light projecting unit on one side in the width direction of the lane to be paired with the second light projecting unit, A second vehicle detection unit having a second light receiving unit capable of receiving reflected light of inspection light, and the inspection light provided on the other side in the width direction of the lane and projected from the second light projecting unit A program for functioning a computer of a vehicle width measuring device comprising: a reflecting unit that regularly reflects the second inspection light and changes a traveling direction of the second inspection light; A vehicle detection determination unit for detecting the vehicle passing through the lane at a vehicle detection position where the first inspection light is projected based on reflected light of the first inspection light; Among the plurality of detection results of the reflected light received by the light receiving unit, a first detection result of detecting reflected light from the first side surface of the vehicle facing the other side in the width direction of the lane through the reflection unit; Based on the second detection result of detecting the reflected light from the second side surface of the vehicle facing one side in the width direction of the lane, the vehicle functions as a vehicle width calculation unit that measures the vehicle width of the vehicle.

  According to the vehicle width measuring device, the vehicle width measuring method, and the program according to the present invention, the vehicle width measuring device, the vehicle width measuring method, and the program can be installed at a toll gate where installation space is limited.

It is a top view which shows the outline | summary of the vehicle width measuring apparatus which concerns on 1st Embodiment. It is a perspective view showing the outline of the vehicle width measuring device concerning a 1st embodiment. It is a figure which shows the function structure of the vehicle width measuring apparatus which concerns on 1st Embodiment. It is a 1st figure for demonstrating the function of the vehicle width measuring apparatus which concerns on 1st Embodiment. It is a 2nd figure for demonstrating the function of the vehicle width measuring apparatus which concerns on 1st Embodiment. It is a 3rd figure for demonstrating the function of the vehicle width measuring apparatus which concerns on 1st Embodiment. It is a 4th figure for demonstrating the function of the vehicle width measuring apparatus which concerns on 1st Embodiment. It is a figure which shows the processing flow of the vehicle width measuring apparatus which concerns on 1st Embodiment. It is a figure which shows the hardware constitutions of the vehicle width measuring apparatus which concerns on 1st Embodiment. It is a figure which shows the function structure of the vehicle width measuring apparatus which concerns on 2nd Embodiment. It is a figure for demonstrating the function of the vehicle width measuring apparatus which concerns on 2nd Embodiment. It is a figure which shows the processing flow of the vehicle width measuring apparatus which concerns on 2nd Embodiment. It is a figure which shows the function structure of the distance measuring device which concerns on other embodiment.

<First Embodiment>
Hereinafter, a vehicle width measuring device 10 according to a first embodiment of the present invention will be described with reference to FIGS.

(Overall configuration of vehicle width measuring device)
FIG. 1 is a top view showing an outline of the vehicle width measuring apparatus according to the first embodiment.
FIG. 2 is a perspective view showing an outline of the vehicle width measuring apparatus according to the first embodiment.
The vehicle width measuring device 10 according to the present embodiment is a device that is provided at an exit toll gate of an expressway that is a toll road and measures the vehicle width of a vehicle A that uses the expressway. In other embodiments, the vehicle width measuring device 10 may be provided at the entrance toll gate of the expressway.
In the example of FIG. 1, an island I is laid on one side (−Y side in FIG. 1) and an other side (+ Y in FIG. 1) along the lane connecting the highway and the general road at the exit toll gate. Wall side W such as a soundproof wall of an expressway is provided on the side). The vehicle A exits from the highway to a general road through the lane.
In the following description, the direction in which the lane extends (± X direction in FIG. 1) is the “lane direction”, and the highway side in the lane direction (+ X side in FIG. 1) is “upstream” or “near the lane direction”. Side ”and the general road side in the lane direction (−X side in FIG. 1) are also referred to as“ downstream side ”or“ back side in the lane direction ”. In addition, a direction (± Y direction in FIG. 1) perpendicular to the lane direction is also referred to as “lane width direction”, and a direction perpendicular to the lane direction (± Z direction in FIG. 2) is “height direction”. Also described.

  As shown in FIG. 1, the vehicle width measuring device 10 includes a vehicle detection unit 100 (first vehicle detection unit) and a sensor unit 110 (second vehicle detection unit) provided on the island I, and a wall portion W. And a reflecting portion 120 provided on the surface facing the lane.

As shown in FIGS. 1 and 2, the vehicle detection unit 100 has a rectangular shape extending in the height direction (± Z direction in FIG. 2) on the island I, and at a predetermined position in the lane direction, It is installed to face the other side in the width direction of the lane. The vehicle detection unit 100 is a sensor that detects that the vehicle A has entered a position where the vehicle detection unit 100 is installed in the lane direction (hereinafter, vehicle detection position D).
Specifically, the vehicle detection unit 100 includes a plurality of pairs of light projecting units E1 (first light projecting units) and light receiving units R1 (second light receiving units) at predetermined intervals in the height direction. Is provided.
The light projecting unit E1 projects inspection light Q (first inspection light) parallel to the road surface of the lane toward the other side in the width direction of the lane (+ Y side in FIG. 2). The light projecting unit E1 is a semiconductor laser that projects infrared light as the inspection light Q, for example. In addition, the light projecting unit E1 is provided so that the direction in which light is projected is parallel to the width direction of the lane (± Y direction in FIG. 2).
The light receiving unit R1 receives the reflected light of the inspection light Q reflected by the vehicle A traveling on the lane, thereby detecting a detection signal associated with each of the inspection light Q projected from the plurality of light projecting units E1. Is output.

  As shown in FIG. 2, the sensor unit 110 is formed in a rectangular shape on the island I extending in the height direction (± Z direction in FIG. 2). The sensor unit 110 is provided with a plurality of pairs of light projecting units E2 (second light projecting units) and light receiving units R2 (second light receiving units) at predetermined intervals in the height direction. .

The light projecting unit E2 projects the inspection light P parallel to the road surface of the lane toward the other side in the width direction of the lane (+ Y side in FIG. 2). The light projecting unit E2 is, for example, a semiconductor laser that projects infrared light as the inspection light P.
In the present embodiment, the sensor unit 110 is installed to be inclined with respect to the lane direction and the width direction of the lane so that the light projecting unit E2 faces the upstream side of the lane (the + X side in FIG. 2). . Accordingly, the light projecting unit E2 emits the inspection light P having a predetermined wavelength in a direction inclined toward the upstream side in the lane direction (+ X side in FIG. 2) with respect to the width direction of the lane (± Y direction in FIG. 2). Flood light. More specifically, as shown in FIG. 1, the light projecting unit E2 is positioned on the vehicle detection position D extending in the width direction of the lane (± Y direction in FIG. 1) and at the center in the width direction of the lane (vehicle Inspection is performed at an inclination angle θ set in advance with respect to the lane direction (± X direction in FIG. 1) so that it passes through the detection position D and the center line C indicating the center in the width direction of the lane). Light P is projected.
Further, as shown in FIG. 2, the light that is projected by each of the light projecting units of the vehicle detection unit 100 and the inspection light P that is projected by each of the light projecting units E2 of the sensor unit 110 are the vehicle detection position D and The positions in the height direction (± Z direction in FIG. 2) of the light projecting part E2 of the sensor part 110 are set so as to intersect at the position where the center line C of the lane intersects. For this reason, each of the plurality of light projecting units E2 emits light in a predetermined order and projects the inspection light P at different heights.

The light receiving unit R2 receives the reflected light of the inspection light P reflected by the vehicle A traveling on the lane, and receives detection signals associated with the inspection light P projected from the plurality of light projecting units E2. Output.
In the present embodiment, the light receiving unit R2 does not output a detection signal when it does not receive the reflected light of the inspection light P. However, in other embodiments, detection that indicates that no light is received. A signal may be output.

  In addition, a vehicle width calculation unit 130 that measures the vehicle width of the vehicle A traveling on the lane based on the detection signal output from the light receiving unit R2 is provided inside the housing of the sensor unit 110. The functional configuration of the vehicle width calculation unit 130 will be described later.

As shown in FIG. 1, the reflecting portion 120 is a traveling direction of the inspection light P projected from the light projecting portion E <b> 2 on the surface facing the one side in the width direction of the lane of the wall portion W (the −Y side in FIG. 1). It is provided so that it may be located on the top.
The reflection unit 120 is a plate-like member formed by, for example, a mirror. The reflection unit 120 regularly reflects the inspection light P projected from each of the light projection units E2 at the inspection light reflection position 120A corresponding to each of the inspection light P. That is, the reflection unit 120 transmits the inspection light P incident from one side in the lane width direction (-Y side in FIG. 1) and from the downstream side in the lane direction (-X side in FIG. 1) (the other side in the lane width direction ( The traveling direction of the inspection light P is changed by reflecting toward the upstream side in the lane direction (+ Y side in FIG. 1) and the upstream side in the lane direction (+ X side in FIG. 1). In the following description, when most of the incident light is reflected toward the side opposite to the incident direction at a reflection angle substantially the same as the incident angle, it is regarded as regular reflection. Further, among the inspection light P projected from the light projecting unit E2, the inspection light P before reaching the reflection unit 120 is also referred to as inspection light P1, and the inspection light P whose traveling direction is changed by the reflection unit 120 is described. Also described as inspection light P2.
As described above, the reflecting portion 120 reflects the inspection light P1 and changes the traveling direction, so that the side surface of the vehicle A (hereinafter referred to as the first side surface) faces the other side in the width direction of the lane (the + Y side in FIG. 1). Can be irradiated with the inspection light P2. Then, the reflection unit 120 further reflects the reflected light of the inspection light P2 reflected from the first side surface of the vehicle A toward the light receiving unit R2.

(Functional configuration of vehicle width measuring device)
Hereinafter, the functional configuration of the vehicle width measuring apparatus 10 according to the present embodiment will be described with reference to FIGS.
FIG. 3 is a diagram illustrating a functional configuration of the vehicle width measuring device according to the first embodiment.
As shown in FIG. 3, the vehicle width measuring device 10 includes the vehicle detection unit 100, the sensor unit 110, the reflection unit 120, and the vehicle width calculation unit 130 described above.

The vehicle width calculation unit 130 measures the vehicle width of the vehicle A traveling on the lane based on the detection signal output from the light receiving unit R2 of the sensor unit 110.
As shown in FIG. 3, the vehicle width calculation unit 130 includes a distance calculation unit 131, a vehicle width calculation unit 132, and a vehicle detection determination unit 135.

The distance calculation unit 131 first projects the inspection light P from the light projecting unit E2 based on the detection signal output from the light receiving unit R2 of the sensor unit 110, and then the light receiving unit R2 performs the inspection light P (inspection). The time taken to receive the reflected light of the lights P1 and P2) is measured. And the distance calculation part 131 calculates the flight distance of the test | inspection light P from the light projection part E2 to the reflective position where the test | inspection light P was reflected based on the measured time. The distance calculation unit 131 outputs the calculated flight distance of the inspection light P to the vehicle width calculation unit 132 as a detection result of the reflected light of the inspection light P.
The vehicle width calculation unit 132 calculates the vehicle width of the vehicle A based on the detection result of the inspection light P output from the distance calculation unit 131.
The vehicle detection determination unit 135 measures the distance from the light projecting unit E1 to the vehicle A based on the detection signal output from the light receiving unit R1 of the vehicle detection unit 100. When the vehicle A is not traveling on the lane, the inspection light Q projected from the light projecting unit E1 is reflected by the wall W, and the light receiving unit R1 receives the reflected light from the wall W. At this time, the vehicle detection determination unit 135 stores a distance from the light projecting unit E1 to the wall portion W in advance. That is, the vehicle detection determination unit 135 determines that the vehicle A is not detected when the detected distance is the distance from the light projecting unit E1 to the wall W. On the other hand, when the detected distance is shorter than the distance from the light projecting part E1 to the wall part W, the vehicle detection determination part 135 determines that the vehicle A is passing the vehicle detection position D. Further, the vehicle detection unit 100 outputs a detection signal indicating that the vehicle A is detected to the distance calculation unit 131 while determining that the vehicle A is passing the vehicle detection position D.

FIG. 4 is a first diagram for explaining the function of the vehicle width measuring apparatus according to the first embodiment.
FIG. 5 is a second diagram for explaining the function of the vehicle width measuring apparatus according to the first embodiment.
FIG. 6 is a third diagram for explaining the function of the vehicle width measuring apparatus according to the first embodiment.
FIG. 7 is a fourth diagram for explaining the function of the vehicle width measuring apparatus according to the first embodiment.
Hereinafter, with reference to FIG. 1 and FIGS. 4 to 7, a process in which the distance calculation unit 131 calculates the flight distance of the inspection light P from the light projecting unit E2 to the reflection position will be described.
The graph of FIG. 4 is an example in which the flight distances calculated by the distance calculation unit 131 are shown in time series, the horizontal axis indicates time, and the vertical axis indicates the flight distance of the inspection light P.
At time “t0” in FIG. 4, as shown in FIG. 1, the vehicle A does not enter the vehicle detection range by the sensor unit 110, that is, the range in which the inspection light P on the lane is projected. In this case, the inspection light P1 projected from the light projecting unit E2 at the time “t0” is reflected by the reflecting unit 120 and proceeds to the upstream side in the lane direction (+ X side in FIG. 1) as the inspection light P2. Since there is nothing on the lane that reflects the inspection light P2, none of the plurality of light receiving portions R2 receives the inspection light P1 and the reflected light of the inspection light P2. As described above, when detection signals are not output from all the light receiving units R2, the distance calculation unit 131 sets infinity (∞) as the value of the flight distance of the inspection light P at the time “t0”.

  Further, it is assumed that the vehicle A enters the range where the inspection light P (inspection light P2) is projected at the time “t1” in FIG. In this case, the inspection light P1 projected from the light projecting unit E2 at the time of “t1” is reflected by the reflecting unit 120 and proceeds to the upstream side in the lane direction (+ X side in FIG. 1) as the inspection light P2. For example, the light is reflected at the reflection position on the front surface of the vehicle A (the surface facing the downstream side in the lane direction). The light receiving unit R2 receives the reflected light of the inspection light P2 and outputs a detection signal. The distance calculation unit 131 measures the time from when the inspection light P1 is projected until the reflected light of the inspection light P1 (inspection light P2) is received based on the detection signal output from the light receiving unit R2. . And based on the measured time, the flight distance of the inspection light P (inspection light P1 and P2) from the light projection part E2 to the front surface of the vehicle A is calculated.

  Further, at time “t2” in FIG. 4, it is assumed that the vehicle A reaches the position where the inspection light P2 is irradiated on the first side surface of the vehicle A as shown in FIG. The inspection light P1 projected from the light projecting unit E2 at the time “t2” is reflected by the reflecting unit 120 and travels upstream as the inspection light P2 in the lane direction (+ X side in FIG. 5). Reflected at a reflective position on the first side. The distance calculation unit 131 performs the same processing as described above, and calculates the flight distance of the inspection light P (inspection light P1 and P2) from the light projecting unit E2 to the reflection position on the first side surface of the vehicle A. The flight distance of the inspection light P calculated by the distance calculation unit 131 at this time is the distance L1 from the light projecting unit E2 to the reflection unit 120 (inspection light reflection position 120A) and the vehicle from the reflection unit 120 (inspection light reflection position 120A). It is a value (L1 + L2) obtained by adding together the distance L2 to the reflection position on the first side surface of A.

  Further, it is assumed that the vehicle A reaches the position where the front surface of the vehicle A is irradiated with the inspection light P1 at the time “t3” in FIG. The inspection light P1 projected from the light projecting unit E2 at the time “t3” is reflected at a reflection position on the front surface of the vehicle A before reaching the reflecting unit 120. At this time, the flight distance of the inspection light P (inspection light P1) calculated by the distance calculation unit 131 is the distance from the light projection unit E2 to the reflection position on the front surface of the vehicle, and the light projection unit E2 to the reflection unit 120 (inspection light). The value is smaller than the distance L1 to the reflection position 120A).

Further, it is assumed that the vehicle detection determination unit 135 detects that the vehicle A has reached the vehicle detection position D as shown in FIG. 6 at the time “t4” in FIG.
The inspection light P1 projected from the light projecting unit E2 at the time “t4” is reflected at the reflection position on the front surface of the vehicle A. At this time, the flight distance of the inspection light P calculated by the distance calculation unit 131 is a distance L3 from the light projecting unit E2 to the reflection position on the front surface of the vehicle.

  Further, at the time of “t5” in FIG. 4, as shown in FIG. 7, the inspection light P <b> 1 is applied to the side surface (hereinafter, the second side surface) of the vehicle A on one side in the width direction of the lane (the −Y side in FIG. 7). It is assumed that the vehicle A has reached the irradiated position. The inspection light P1 projected from the light projecting unit E2 at the time “t5” does not reach the reflecting unit 120 and is reflected at the reflecting position on the second side surface of the vehicle A. The flight distance of the inspection light P (inspection light P1) calculated by the distance calculation unit 131 at this time is the distance L4 from the light projecting unit E2 to the reflection position on the second side surface of the vehicle, and is calculated by the distance calculation unit 131. It becomes the smallest value among the values of the flight distance of the inspection light P.

  Further, it is assumed that the vehicle A has passed downstream in the lane direction from the irradiation range of the inspection light P1 at the time “t6” in FIG. The inspection light P1 projected from the light projecting unit E2 at the time “t6” is reflected by the reflecting unit 120 to the upstream side in the lane direction as the inspection light P2, similarly to the inspection light P1 at the time “t0”. proceed. At this time, since there is nothing on the lane that reflects the inspection light P1 and the inspection light P2, none of the plurality of light receiving parts R2 receives the reflected light of the inspection light P1 and the inspection light P2. As described above, when the detection signals are not output from all the light receiving units R2, the distance calculation unit 131 sets infinity (∞) as the value of the flight distance of the inspection light P at the time “t6”.

  For example, the light receiving unit R2 outputs a plurality of detection signals associated with each of the inspection lights P1 projected by the plurality of light projecting units E2 at time “t2”. The distance calculation unit 131 calculates a plurality of flight distances of the inspection light P at time “t2” based on each of the plurality of detection signals. At this time, since the inspection light P is projected at different heights, if the first side surface of the vehicle A is uneven, the calculation result of the flight distance of the inspection light P may vary. In this case, the distance calculation unit 131 selects, for example, the largest value among the calculation results that are valid values (values other than infinity), and sets the vehicle as the flight distance of the inspection light P at the time “t2”. It may be output to the width calculation unit 132, or the calculation result that is an effective value may be averaged to obtain the flight distance of the inspection light P at that time.

The vehicle width calculation unit 132 calculates the vehicle width of the vehicle A based on the detection result of the inspection light P output from the distance calculation unit 131 (the flight distance of the inspection light P at each time point).
In the example of FIG. 4, the vehicle width calculation unit 132 displays a plurality of detection results in the period from “t1” to “t6” in which the value of the flight distance of the inspection light P is other than infinity (∞). It is determined that the vehicle is associated with the vehicle.

Further, the vehicle detection determination unit 135 detects the forward and backward movement of the vehicle A based on the flight distance of the inspection light P at each time point calculated by the distance calculation unit 131.
For example, when the vehicle A moves forward on the lane (travels in the −X direction in FIG. 1), the vehicle detection determination unit 135 detects that the vehicle A has reached the vehicle detection position D, that is, “ A flight distance longer than the distance L3 is detected at a time before “t4” (period “t1” to “t4”), and a time after “t4” (period “t4” to “t5”) ), A flight distance shorter than the distance L3 is detected. On the other hand, when the vehicle A moves backward after reaching the vehicle detection position D, the vehicle detection determination unit 135 detects a flight distance longer than the distance L3 at a time later than “t4”. As described above, the vehicle detection determination unit 135 advances the vehicle A and passes the vehicle detection position D based on the flight distance at the time before and after the timing (“t4”) when the vehicle A reaches the vehicle detection position D. It is possible to determine whether the vehicle has moved (passed in the -X direction in FIG. 1) or moved backward and exited the vehicle detection position (retracted in the + X direction in FIG. 1).
Further, when the vehicle A is moving forward on the lane (traveling in the −X direction in FIG. 1), as shown in FIG. 4, the flight distance decreases during the period “t1” to “t2”. In the period from “t2” to “t3” (period in which the inspection light P is reflected on the first side surface of the vehicle A as shown in FIG. 5), the flight distance is substantially constant. When the vehicle detection determination unit 135 detects that the vehicle A has reached the vehicle detection position D at time “t3”, the flight distance decreases during the period “t3” to “t5”, and “t5” to “t5” A measurement pattern is obtained in which the flight distance is substantially constant during the period t6 (period in which the inspection light P is reflected on the second side surface of the vehicle A as shown in FIG. 7). When the flight distance different from the above measurement pattern is calculated (for example, when the flight distance increases during the period from “t2” to “t3”), the vehicle detection determination unit 135 sets the flight distance value to infinity. In this case, it may be determined that the vehicle A has moved backward (traveled in the + X direction in FIG. 1).
For example, there is a toll gate having a plurality of lanes, a lane (general lane) where a toll is resident and collects tolls, and a lane (ETC dedicated lane) provided with an electronic toll collection system. In such a toll booth, when a vehicle A not equipped with an on-vehicle device accidentally enters the ETC dedicated lane, it may move backward once and reenter the general lane. At this time, if the vehicle detection unit 100 detects the vehicle A and cannot detect that the vehicle moves backward and exits the ETC lane, an erroneous billing process is performed in the electronic toll collection system installed in the ETC lane. May be done. For this reason, as in the present embodiment, the vehicle detection determination unit 135 detects whether the vehicle A is moving forward and backward, and determines whether the vehicle A has moved forward through the toll gate or moved backward. . As a result, the vehicle detection determination unit 135 can prevent erroneous billing processing from being performed in the electronic toll collection system.
When the vehicle detection determination unit 135 determines that the vehicle A has moved backward, for example, the vehicle width calculation unit 132 calculates the vehicle width by excluding the flight distance calculated while the vehicle A is moving backward. Thereby, it can prevent that the calculation result of a vehicle width becomes inaccurate by the behavior of the vehicle A.

(Processing flow of the vehicle width measuring device)
FIG. 8 is a diagram illustrating a processing flow of the vehicle width measuring device according to the first embodiment.
Hereinafter, a process in which the vehicle width calculation unit 132 calculates the vehicle width will be described with reference to FIG.
First, the vehicle width calculation unit 132 indicates the flight distance of the inspection light P from the light projecting unit E2 to the first side surface of the vehicle A from the flight distance of the inspection light P at each time point calculated by the distance calculation unit 131. "One detection result" is specified (step S101).
In the present embodiment, a distance L1 (FIG. 5), which is a value obtained by measuring an actual distance from the light projecting unit E2 to the reflecting unit 120 (inspection light reflecting position 120A), is input to the vehicle width calculating unit 132 in advance. Yes. The vehicle width calculation unit 132 calculates the flight distance of the inspection light P having the smallest value from the group of flight distances of the inspection light P having a value larger than the distance L1 from the light projecting unit E2 to the first side surface of the vehicle A. Extracted as a “first detection result” indicating the flight distance of the inspection light P to the upper reflection position. In the example of FIG. 4, the vehicle width calculation unit 132 calculates a value larger than the distance L1 in the period from “t1” to “t3”, and the smallest value among these is “t2 "L1 + L2" calculated in the period from "t3" to "t3". The vehicle width calculation unit 132 specifies the flight distance “L1 + L2” of the inspection light P as the “first detection result”.

Next, the vehicle width calculation unit 132 indicates the flight distance of the inspection light P from the light projecting unit E2 to the second side surface of the vehicle A from the flight distance of the inspection light P at each time point calculated by the distance calculation unit 131. The “second detection result” is specified (step S102).
The vehicle width calculation unit 132 determines the flight distance of the inspection light P having the smallest value among the flight distance group of the inspection light P having a value smaller than the distance L1 from the light projecting unit E2 to the second side surface of the vehicle A. It is extracted as a “second detection result” indicating the flight distance of the inspection light P until. In the example of FIG. 4, the vehicle width calculation unit 132 calculates a value smaller than the distance L1 in the period from “t3” to “t6”, and the smallest value is “t5”. "L4" calculated in the period from "t6" to "t6". The vehicle width calculation unit 132 specifies the flight distance “L4” of the inspection light P as the “second detection result”.

  Note that if the vehicle body of the vehicle A is uneven, the flight distance of the inspection light P may vary depending on the reflection position of the first side surface of the vehicle A. For this reason, the vehicle width calculation unit 132 selects the inspection light P having a value within a predetermined error range (for example, within 10 cm) from the minimum value in the group of flight distances of the inspection light P having a value larger than the distance L1. The flight distance may be extracted, and the average value of the extracted group may be specified as the “first detection result”. In addition, the vehicle width calculation unit 132 performs statistical processing on the detection results in the period from “t1” to “t6”, and extracts the minimum value group in the group having a value equal to or greater than the distance L1 based on the standard deviation. The average value of the extracted population may be specified as the “first detection result”. The same applies to the “second detection result”.

Next, as shown in FIG. 5, the vehicle width calculation unit 132 calculates a distance Y2 in the width direction of the lane from the reflection unit 120 to the first side surface of the vehicle A based on the “first detection result”. (Step S103).
First, the vehicle width calculation unit 132 calculates the flight distance L2 of the inspection light P from the reflection unit 120 (inspection light reflection position 120A) to the first side surface of the vehicle A based on the “first detection result”. As described above, since the distance L1 from the light projecting unit E2 to the reflecting unit 120 (inspection light reflecting position 120A) is input in advance to the vehicle width calculating unit 132, the vehicle width calculating unit 132 determines that the “first detection A value obtained by subtracting the distance L1 (flight distance of the inspection light P1) from the flight distance of the inspection light P (inspection light P1 and P2) indicated by “result” is calculated as a value of the distance L2 (flight distance of the inspection light P2).
Then, the vehicle width calculation unit 132 calculates the horizontal distance Y2 between the first side surface of the vehicle A and the reflection unit 120 based on the distance L2. As described above, the light projecting unit E2 projects the inspection light P1 at an inclination angle θ set in advance with respect to the lane direction. For this reason, the traveling direction of the inspection light P2 specularly reflected by the reflecting unit 120 is also inclined at the same inclination angle θ with respect to the lane direction. The vehicle width calculation unit 132 calculates the distance Y2 by the following formula (1) based on the inclination angle θ and the distance L2.
Y2 = L2 × sin θ (1)

Next, as shown in FIG. 7, the vehicle width calculation unit 132 calculates a distance Y3 in the width direction of the lane from the light projecting unit E2 to the second side surface of the vehicle A based on the “second detection result”. (Step S104).
The vehicle width calculation unit 132 is based on the flight distance L4 of the inspection light P from the light projecting unit E2 to the first side surface of the vehicle A indicated by the “second detection result” and the inclination angle θ of the inspection light P. The distance Y3 is calculated by the following formula (2).
Y3 = L4 × sin θ (2)

Next, the vehicle width calculation unit 132 calculates the vehicle width of the vehicle A (step S105).
In the present embodiment, a distance Y1 (FIG. 5), which is a value obtained by measuring an actual distance in the width direction of the lane from the light projecting unit E2 to the reflecting unit 120, is input to the vehicle width calculating unit 132 in advance. The vehicle width calculation unit 132 calculates the vehicle width of the vehicle A by subtracting the calculated distance Y2 and the distance Y3 from the distance Y1.

(Hardware configuration of vehicle width measuring device)
FIG. 9 is a diagram illustrating a hardware configuration of the vehicle width measuring device according to the first embodiment.
Hereinafter, the hardware configuration of the vehicle width measuring apparatus 10 will be described with reference to FIG.

The computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, an input / output interface 904, and a communication interface 905.
The vehicle width calculation unit 130 of the vehicle width measuring device 10 described above is mounted on the computer 900. And the operation | movement of the vehicle width calculating part 130 of the vehicle width measuring device 10 mentioned above is memorize | stored in the auxiliary storage device 903 which each computer 900 has in the format of the program. The CPU 901 reads a program from the auxiliary storage device 903, develops it in the main storage device 902, and executes the above processing according to the program. Further, the CPU 901 stores various data (detection signals and the like) acquired by the vehicle width measurement device 10 via the sensor unit 110 and various data calculated by the vehicle width calculation unit 130 along with the measurement of the vehicle width according to the program. A storage area (not shown) is secured in the main storage device 902. In addition, the CPU 901 ensures a storage area for storing data being processed in the auxiliary storage device 903 according to the program.
The computer 900 is connected to the external storage device 910 via the input / output interface 904, and a storage area (not shown) of the vehicle width measuring device 10 may be secured in the external storage device 910. The computer 900 may be connected to the external storage device 920 via the communication interface 905, and a storage area (not shown) of the vehicle width measuring device 10 may be secured in the external storage device 920.

  In at least one embodiment, the auxiliary storage device 903 is an example of a tangible medium that is not temporary. Other examples of the tangible medium that is not temporary include a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, and a semiconductor memory connected via the input / output interface 904. When this program is distributed to the computer 900 via a communication line, the computer 900 that has received the distribution may develop the program in the main storage device 902 and execute the above processing.

  The program may be for realizing a part of the functions described above. Further, the program may be a so-called difference file (difference program) that realizes the above-described function in combination with another program already stored in the auxiliary storage device 903.

(Function and effect)
As described above, the vehicle width measuring device 10 according to the present embodiment has the light projecting unit E1 (first light projecting unit) capable of projecting the inspection light Q (first inspection light) in the width direction of the lane. And a vehicle detection unit 100 (first vehicle detection unit) having a light receiving unit R1 (first light receiving unit) provided to be paired with the light projecting unit E1 and capable of receiving reflected light of the inspection light Q; A vehicle detection determination unit 135 that detects the vehicle A passing through the lane at the vehicle detection position D where the inspection light Q is projected based on the reflected light of the inspection light Q, and provided on one side in the width direction of the lane, The light projecting part E2 (second light projecting part) capable of projecting the inspection light P (second inspection light) inclined toward the lane direction with respect to the width direction of the lane, and the one side in the width direction of the lane A sensor unit 11 having a light receiving part R2 (second light receiving part) provided so as to be paired with the light part E2 and capable of receiving the reflected light of the inspection light P. (Second vehicle detection unit) and a reflection unit 120 that is provided on the other side in the width direction of the lane and reflects the inspection light P projected from the light projection unit E2 to change the traveling direction of the inspection light P The first detection result of detecting the reflected light from the first side surface of the vehicle A on the other side in the width direction of the lane through the reflecting unit 120 among the detection results of the plurality of reflected light received by the light receiving unit R2; A vehicle width calculation unit 132 that measures the vehicle width of the vehicle A based on the second detection result of detecting the reflected light from the second side surface of the vehicle A on one side in the width direction of the lane.
By doing in this way, the vehicle width measuring device 10 can measure the vehicle width of the vehicle A based on each reflected light reflected from the first side surface and the second side surface of the vehicle A. Further, since the vehicle width measuring device 10 has a compact configuration in which only the reflecting portion 120 that regularly reflects the inspection light P is installed on the other side in the width direction of the lane, even if the toll gate has a limited installation space. It can be installed.
Furthermore, the vehicle detection determination unit 135 determines whether the vehicle A has moved backward based on the detection result of the vehicle A based on the reflected light of the inspection light Q and the detection result of the reflected light of the inspection light P. be able to.
For example, when vehicle A enters the ETC lane and then moves backward and re-enters another lane (general lane), an incorrect billing process is performed in the electronic toll collection system installed in the ETC lane. There is a possibility. However, when the vehicle detection determination unit 135 detects the backward movement of the vehicle A, it is possible to prevent an erroneous charging process from being performed in the electronic toll collection system.
Further, when the vehicle detection determination unit 135 detects the backward movement of the vehicle A, for example, the vehicle width calculation unit 132 calculates the vehicle width by excluding the flight distance calculated while the vehicle A is moving backward. Thereby, it can prevent that the calculation result of a vehicle width becomes inaccurate by the behavior of the vehicle A.

Further, the vehicle width calculation unit 132 includes a distance calculation unit 131 that calculates a distance from the light projecting unit E2 to the reflection position where the inspection light P is reflected by the vehicle A based on the detection results of the plurality of reflected lights. The vehicle width calculation unit 132 calculates the detection result having the smallest value among the detection results in which the distance from the light projecting unit E2 to the reflection position is larger than the distance L1 from the light projecting unit E2 to the reflective unit 120. The detection result having the smallest value among the detection results in which the distance from the light projecting unit E2 to the reflection position is smaller than the distance L1 from the light projecting unit E2 to the reflective unit 120 is selected as the “second detection result”. Select as “Detection result”.
By doing in this way, the distance calculation part 131 can each calculate the distance (detection result) to the reflective position in each timing when the light projection part E2 projected the test light P. And the vehicle width calculation part 132 is based on the distance L1 from the light projection part E2 to the reflection part 120, and the distance from the light projection part E2 calculated by the distance calculation part 131 to the reflection position on the vehicle A. Of the plurality of detection results calculated by the calculation unit 131, the first detection result indicating the detection result of the reflected light reflected from the first side surface of the vehicle A and the reflected light reflected from the second side surface of the vehicle A It is possible to select a second detection result indicating the detection result.

  In this embodiment, the vehicle width calculation unit 132 determines the flight distance of the inspection light P having the smallest value among the group of flight distances of the inspection light P having a value that is larger (smaller) than the distance L1. Although the aspect identified as “one detection result (second detection result)” has been described, the present invention is not limited to this. When the same value continues for a certain time or more in the flight distance group of the inspection light P having a value larger (smaller) than the distance L1, the vehicle width calculation unit 132 sets this value as “first detection result”. (Second detection result) ”may be specified. At this time, the vehicle width calculation unit 132 considers the unevenness of the vehicle and determines that the values are the same if they are within a predetermined error range (for example, within 10 cm).

<Second Embodiment>
Next, a vehicle width measuring device 10 according to a second embodiment of the present invention will be described with reference to FIGS.
Constituent elements common to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
In the present embodiment, the functional configuration of the vehicle width calculation unit 130 is different from that of the first embodiment.

(Functional configuration of vehicle width measuring device)
Hereinafter, the functional configuration of the vehicle width measuring apparatus 10 according to the present embodiment will be described with reference to FIGS.
FIG. 10 is a diagram illustrating a functional configuration of the vehicle width measuring device according to the second embodiment.
As shown in FIG. 10, the vehicle width calculation unit 130 according to the present embodiment further includes an error calculation unit 133.
In the first embodiment, since the distance calculation unit 131 calculates the flight distance of the inspection light P based only on the detection signal output from the light receiving unit R2, the calculation result may include a measurement error. There is. Therefore, the vehicle width calculation unit 130 according to the present embodiment calculates such a measurement error by the error calculation unit 133, and measures the vehicle width reflecting the measurement error.

FIG. 11 is a diagram for explaining the function of the vehicle width measuring apparatus according to the second embodiment.
FIG. 12 is a diagram illustrating a processing flow of the vehicle width measuring device according to the second embodiment.
Hereinafter, with reference to FIG. 11 to FIG. 12, processing in which the vehicle width measuring device 10 measures the vehicle width in consideration of measurement errors will be described.
First, a distance L5 (FIG. 11) that is a value obtained by measuring an actual distance from the light projecting unit E2 to the intersection of the vehicle detection position D and the center line C is input to the error calculation unit 133 in advance.
In addition, as shown in FIG. 11, the error calculation unit 133 is configured to detect the flight distance (third time) of the inspection light P when the vehicle detection unit 100 detects the vehicle A (when the vehicle A reaches the vehicle detection position D). The detection result is acquired as the reference distance L5 ′ (step S201).

Next, the error calculation unit 133 calculates a difference ΔL5 between the actual distance L5 and the reference distance L5 ′ as a measurement error, and outputs it to the vehicle width calculation unit 132 (step S202).
The error calculation unit 133 may calculate a proportionality coefficient α (“α = L5 / L5 ′”) of the actual distance L5 with respect to the reference distance L5 ′ as a measurement error.
Further, the error calculation unit 133 may calculate the distance X ′ from the light projecting unit E2 to the front surface of the vehicle A in the lane direction based on the reference distance L5 ′ and the inclination angle θ of the inspection light P1. Good. In this case, the error calculation unit 133 is input in advance with a distance X that is a value obtained by measuring an actual distance from the light projecting unit E2 to the vehicle detection position D in the lane direction. Then, the error calculation unit 133 determines the measurement error (the difference ΔX between the distance X and the distance X ′ or the proportional coefficient “α of the distance X with respect to the distance X ′) based on the calculated distance X ′ and the actual distance X. = X / X '") may be calculated.

Next, the vehicle width calculation unit 132 determines the first detection result (FIG. 5) based on the flight distance (detection result) of the inspection light P calculated by the distance calculation unit 131 and the measurement error calculated by the error calculation unit 133. 4 and “L1 + L2” in FIG. 5) and the second detection result (“L4” in FIGS. 4 and 7) are corrected (step S203).
When the error calculation unit 133 calculates the difference ΔL5 between the actual distance L5 and the reference distance L5 ′ as a measurement error, the vehicle width calculation unit 132 calculates the first detection result (“L1 + L2”) and the second detection result ( The first detection result and the second detection result are corrected by subtracting ΔL5 from each of L4).
Further, when the error calculation unit 133 calculates the proportional coefficient α of the actual distance L5 with respect to the reference distance L5 ′ as a measurement error, the vehicle width calculation unit 132 sets the first detection result and the second detection result, respectively. By multiplying the proportional coefficient α, the first detection result and the second detection result are corrected.

  Next, the vehicle width calculation unit 132 calculates the vehicle width of the vehicle A based on the corrected first detection result and the second detection result (step S204). In addition, the process which the vehicle width calculation part 132 performs in step S204 is the same as the process (steps S103-S105) of the vehicle width calculation part 132 of 1st Embodiment.

(Function and effect)
As described above, in the vehicle width measuring device 10 according to the present embodiment, the light projecting unit E2 projects the inspection light P so as to intersect the vehicle detection position D on the lane. The vehicle width calculation unit 132 acquires the flight distance of the inspection light P calculated by the distance calculation unit 131 when the vehicle detection unit 100 detects the vehicle A as a third detection result, and the inspection light P from the light projecting unit E2. And the measurement error of the flight distance of the inspection light P calculated by the distance calculation unit 131 based on the distance L5 measured in advance up to the position where the vehicle detection position D intersects with the third detection result (distance L5 ′). It further has an error calculation unit 133 for calculating.
By doing in this way, the error calculation part 133 is the distance L5 from the light projection part E2 measured beforehand to the position where the inspection light P and the vehicle detection position D intersect, and the light projection part calculated by the distance calculation part 131 A measurement error of the flight distance of the inspection light P calculated by the distance calculation unit 131 can be calculated by comparing the distance L5 ′ from E2 to the position where the inspection light P and the vehicle detection position D intersect. The vehicle width calculation unit 132 can improve the accuracy of the measurement result of the vehicle width by measuring the vehicle width of the vehicle A by reflecting the measurement error.

<Other embodiments>
Hereinafter, as another embodiment, a distance measuring device 10A that measures the distance to the vehicle A will be described instead of the vehicle width measuring device 10 according to the first and second embodiments described above.
FIG. 13 is a diagram illustrating a functional configuration of a distance measuring device according to another embodiment.
As shown in FIG. 13, the distance measuring device 10A according to the present embodiment is similar to the vehicle width measuring device 10 according to the above-described embodiment, and includes a vehicle detection unit 100, a light projecting unit E2, and a light receiving unit R2. Part 110. The functional configurations of the vehicle detection unit 100 and the sensor unit 110 are the same as those of the vehicle width measurement device 10 according to the above-described embodiment.
The distance measuring device 10A includes a distance calculating unit 130A instead of the vehicle width calculating unit 130 of the vehicle width measuring device 10 according to the above-described embodiment.
The distance measuring device 10A according to the present embodiment measures the flight distance of the inspection light P from the light projecting unit E2 to the reflection position on the front surface or the second side surface of the vehicle A. For this reason, in this embodiment, as shown in FIG. 13, the reflection part 120 may be omitted. Further, the distance measuring device 10A according to the present embodiment may output the measured flight distance of the inspection light P to a vehicle type discriminating device (not shown) connected via a wired network. The vehicle type identification device uses the flight distance of the inspection light P measured by the distance measurement device 10A as information for specifying vehicle information (vehicle length, vehicle width, vehicle height, etc.) for specifying the vehicle type, for example.

The distance calculation unit 130A measures the distance from the light projecting unit E2 to the vehicle A traveling on the lane based on the detection signal output from the light receiving unit R2 of the sensor unit 110.
As illustrated in FIG. 13, the distance calculation unit 130 </ b> A includes a distance calculation unit 131, an error calculation unit 133, and a distance output unit 134.
The distance calculation unit 131 and the error calculation unit 133 have the same functions as the distance calculation unit 131 and the error calculation unit 133 according to the second embodiment described above.
Based on the flight distance (detection result) of the inspection light P calculated by the distance calculation unit 131 and the measurement error calculated by the error calculation unit 133, the distance output unit 134 transmits the light from the light projecting unit E2 on the vehicle A. The flight distance of the inspection light P to the reflection position is corrected. Then, the distance output unit 134 outputs the corrected flight distance of the inspection light P to a vehicle type identification device (not shown) or the like.
By having such a configuration, the distance measurement device 10A can improve the measurement accuracy of the flight distance of the inspection light P by reflecting the measurement error calculated by the error calculation unit 133.

As mentioned above, although embodiment of this invention was described in detail, unless it deviates from the technical idea of this invention, it is not limited to these, A some design change etc. are possible.
For example, in the first embodiment, the aspect in which the vehicle width measuring device 10 includes the vehicle detection unit 100 has been described, but the invention is not limited thereto. In other embodiments, even if the vehicle detection unit 100 is omitted, it is possible to obtain the same effects as those of the first embodiment.

  Moreover, in 1st Embodiment, the vehicle width calculating part 130 in the width direction of the lane between the light projection part E2 and the 2nd side surface of the vehicle A based on the detection signal of the light-receiving part R2 of the sensor part 110. Although the aspect which calculates distance Y3 was demonstrated, it is not restricted to this. For example, the vehicle width calculation unit 130 replaces the detection signal of the light receiving unit R2 with the distance Y3 in the width direction of the lane from the vehicle detection unit 100 to the second side surface of the vehicle A based on the detection signal of the vehicle detection unit 100. You may make it get as'. In this case, a distance Y1 ′ that is a value obtained by measuring an actual distance in the width direction of the lane from the vehicle detection unit 100 to the reflection unit 120 is input to the vehicle width calculation unit 132 in advance. Then, the vehicle width calculation unit 132 calculates the vehicle width of the vehicle A by subtracting the calculated distance Y2 and the distance Y3 from the distance Y1.

DESCRIPTION OF SYMBOLS 10 Vehicle width measuring device 10A Distance measuring device 100 Vehicle detection part (1st vehicle detection part)
110 Sensor unit (second vehicle detection unit)
120 Reflector 130 Vehicle Width Calculation Unit 130A Distance Calculation Unit 131 Distance Calculation Unit 132 Vehicle Width Calculation Unit 133 Error Calculation Unit 134 Distance Output Unit 135 Vehicle Detection Judgment Units E1 and E2 Projection Units (first projection unit, second projection unit) )
I Island R1, R2 Light receiving part (first light receiving part, second light receiving part)
W Wall

Claims (5)

A vehicle width measuring device that measures the width of a vehicle traveling in a lane,
A first light projecting unit capable of projecting a first inspection light in the width direction of the lane, and a pair of the first light projecting unit and a reflected light of the first inspection light; A first vehicle detection unit having a first light receiving unit capable of receiving light;
A vehicle detection determination unit that detects the vehicle passing through the lane at a vehicle detection position where the first inspection light is projected based on the reflected light of the first inspection light;
A second light projecting portion that is provided on one side in the width direction of the lane and is inclined toward the lane direction with respect to the width direction of the lane, and one side in the width direction of the lane; A second vehicle detection unit provided on the side to be paired with the second light projecting unit and having a second light receiving unit capable of receiving reflected light of the second inspection light;
A reflection portion that is provided on the other side in the width direction of the lane and reflects the second inspection light to change the traveling direction of the second inspection light;
Of the detection results of the plurality of reflected lights received by the second light receiving unit, the first detected reflected light from the first side surface of the vehicle facing the other side in the width direction of the lane through the reflecting unit. And a vehicle width calculation unit for measuring the vehicle width of the vehicle based on the detection result of the vehicle and the second detection result of detecting reflected light from the second side surface of the vehicle facing one side in the width direction of the lane. ,
A vehicle width measuring device comprising: The vehicle width calculator is
The flight distance of the second inspection light from the second light projecting unit to the reflection position where the second inspection light is reflected by the vehicle is calculated, and the reflected light of the second inspection light is calculated. It has a distance calculation unit that outputs as a detection result,
Among the detection results in which the distance from the second light projecting unit to the reflection position is larger than the distance from the second light projecting unit to the reflection unit, the detection result having the smallest value is the first detection. As a result,
Among the detection results in which the distance from the second light projecting unit to the reflection position is smaller than the distance from the second light projecting unit to the reflection unit, the detection result having the smallest value is the second detection. Identify as a result,
The vehicle width measuring device according to claim 1. The second light projecting unit projects the second inspection light so as to intersect the vehicle detection position on the lane,
The vehicle width calculation unit acquires a flight distance of the second inspection light calculated by the distance calculation unit when the vehicle detection determination unit detects the vehicle as a third detection result, The second inspection calculated by the distance calculation unit based on a distance measured in advance from the light projecting unit to a position where the second inspection light and the vehicle detection position intersect with each other and the third detection result An error calculation unit for calculating a measurement error of the flight distance of light;
The vehicle width measuring device according to claim 2. A vehicle width measurement method for measuring a vehicle width of a vehicle traveling in a lane,
A first light projecting step of projecting a first inspection light in the width direction of the lane;
From the one side in the width direction of the lane, a second light projecting step that projects the second inspection light inclined toward the lane direction with respect to the width direction of the lane;
A first light receiving step for receiving reflected light of the first inspection light;
On the one side in the width direction of the lane, a second light receiving step for receiving reflected light of the second inspection light;
On the other side in the width direction of the lane, a reflection step for regularly reflecting the second inspection light projected in the second light projecting step to change the traveling direction of the second inspection light;
A vehicle detection determination step of detecting the vehicle passing through the lane at a vehicle detection position where the first inspection light is projected based on the reflected light of the first inspection light;
Of the detection results of the plurality of reflected light received in the second light receiving step, the first detected reflected light from the first side surface of the vehicle facing the other side in the width direction of the lane through the reflecting step. Vehicle width calculating step for measuring the vehicle width of the vehicle based on the detection result of the second vehicle and the second detection result of detecting the reflected light from the second side surface of the vehicle facing one side in the width direction of the lane. ,
A vehicle width measuring method. A first light projecting unit capable of projecting the first inspection light in the width direction of the lane, and the first light projecting unit are provided so as to be paired with the reflected light of the first inspection light. A first vehicle detector having a possible first light receiver;
A second light projecting portion that is provided on one side in the width direction of the lane and is inclined toward the lane direction with respect to the width direction of the lane, and one side in the width direction of the lane; A second vehicle detection unit provided on the side to be paired with the second light projecting unit, and having a second light receiving unit capable of receiving a second reflected light of the second inspection light;
A reflection unit that is provided on the other side in the width direction of the lane and that regularly reflects the second inspection light projected from the second light projecting unit to change the traveling direction of the second inspection light;
A program for causing a computer of a vehicle width measuring device comprising:
A vehicle detection determination unit that detects a vehicle traveling in the lane passing through the lane at a vehicle detection position where the first inspection light is projected based on the reflected light of the first inspection light;
Among the detection results of the plurality of reflected lights received by the second light receiving unit, the first detected light reflected from the first side surface of the vehicle facing the other side in the width direction of the lane through the reflecting unit. A vehicle width calculation unit that measures the vehicle width of the vehicle based on the detection result and a second detection result of detecting reflected light from the second side surface of the vehicle facing one side in the width direction of the lane;
Program to function as.

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