JP2000348283A - Method for detecting passing vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a passing vehicle detecting method capable of detecting a travel direction of a vehicle, also confirming the passing of the vehicle two times and also eliminating the deficiency of a passing vehicle detecting method using a loop coil. SOLUTION: A flux gate 1 is provided at the side of a road 2, the direction of the gate 1 is adjusted so as to generate a high voltage change area where one of optionally selected output voltage Vx of the gate 1 of when a vehicle 3 passes makes change that exceeds an output voltage Vn of the gate 1 of when a vehicle does not pass and a low voltage change area where the voltage Vx makes change that falls below the voltage Vn, the voltage Vx is inputted to a detection circuit 4 to detect which is first outputted between voltage exceeding the threshold voltage Va of the high voltage change area and voltage falling below the threshold voltage of the low voltage change area Vb, and it is detected that the vehicle passes through two fixed positions and the travel direction of the vehicle is also detected according to the two detection.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for checking the arrival of a vehicle at a plurality of positions in a traffic direction of a vehicle using a fluxgate, and for checking the traffic direction of the vehicle. The present invention relates to a passing vehicle detection method that can be detected. Further, the invention of the present application is necessary for a driving vehicle and a pedestrian trying to cross the lane so that the rear of the passing vehicle can be displayed on a television monitor after confirming the traffic direction of the lane. The present invention relates to a passing vehicle detection method capable of displaying various signals. [0002] A conventional passing vehicle detection method is to embed two loop coils at two positions before and after a lane and determine which loop coil detects the vehicle first. As a result, two positions before and after the passage of the vehicle are confirmed twice, and the traveling direction of the vehicle is detected (Japanese Patent Application Laid-Open Nos. 54-156500 and 61-282999). In addition, as prior patent documents in related fields, utility model registration No. 655782, utility model registration No. 731051, JP-A-51-580970,
JP-A 7-85399, JP-A 8-313645, JP-A
8-313646 JP, JP-A-10-40353 JP, JP-A-11-349
No. 7, there was nothing related to the present invention. [0003] According to the above-mentioned conventional passing vehicle detection method, it is necessary to use two loop coils and the construction cost for embedding the loop coils is high. Also, after the loop coil has been embedded, the passing vehicle detection position cannot be easily changed. In addition, there is a fear that the loop coil may be disconnected due to a crack generated on the road surface at the buried position and that the loop coil may not be used due to flooding. Furthermore, since the position where the effective detection distance is about 40 cm higher than the road surface is the limit, there is a risk that vehicle detection may be erroneous particularly in vehicles with a large vehicle height such as RV vehicles. When the loop coil stops functioning as a sensor due to disconnection etc.
It is necessary to dig up the loop coil and bury the new one again, which requires time and money for restoration work. The present invention has been devised in view of the above points, and it is possible to confirm that a vehicle has reached a plurality of positions in the traffic direction of a lane using a fluxgate, and to detect the traffic direction of the vehicle, It is an object of the present invention to provide a passing vehicle detection method that can eliminate the drawbacks when using a loop coil. Further, the invention of the present application is necessary for a driving vehicle and a pedestrian trying to cross the lane so that the rear of the passing vehicle can be displayed on a television monitor after confirming the traffic direction of the lane. It is an object of the present invention to provide a passing vehicle detection method capable of displaying various signals. According to a first aspect of the present invention, a detection circuit detects one or both of two voltage patterns of two output voltages of a flux gate installed on a side of a vehicle road. It is an object of the present invention to provide a passing vehicle detection method, wherein a passing direction of a vehicle is detected by detecting that the vehicle passes at least two positions on a lane. According to a second aspect of the present invention, a fluxgate is installed on a side of a vehicle road, and an output voltage of one of the fluxgates when the vehicle passes is determined by an output of the fluxgate when the vehicle does not pass. With respect to the voltage, the direction of the flux gate is adjusted so that a high voltage change region that changes more and a low voltage change region that changes below are generated, and the detection circuit outputs the selected one output voltage of the flux gate. The detection circuit detects which of the voltage higher than the threshold voltage of the high voltage change region and the voltage lower than the threshold voltage of the low voltage change region is output first, and performs two detections. It is an object of the present invention to provide a passing vehicle detection method, wherein a passing direction of a vehicle is detected by detecting that the vehicle passes through two fixed positions on a lane. According to a third aspect of the present invention, a fluxgate is provided on a side of a road, and two output voltages of the fluxgate when a vehicle passes therethrough have a pair of chevron shapes having different phases corresponding to a change in the position of the vehicle. The direction of the flux gate is adjusted so as to cause a change, and the two output voltages of the flux gate are input to the detection circuit, and the detection circuit outputs which of the high peak voltage value and the low peak voltage value first. It is an object of the present invention to provide a method of detecting a passing vehicle, characterized by detecting that a vehicle has passed two positions on a roadway by two detections and detecting a passing direction of the vehicle. According to a fourth aspect of the present invention, a fluxgate is provided on a side of a road, and two output voltages of the fluxgate when the vehicle passes therethrough have a pair of chevron shapes having different phases corresponding to a change in the position of the vehicle. The direction of the flux gate is adjusted so as to cause a change, and the two output voltages of the flux gate are input to a detection circuit. A passing vehicle detecting method for detecting a passing direction of the vehicle by detecting that the vehicle passes four positions on the lane by detecting the four changing points. It is in. According to a fifth aspect of the present invention, two fluxgates are installed on one side or both sides of a road, and one output voltage of each of the two fluxgates is selected so that the pair of output voltages pass through the road. The direction of each fluxgate is adjusted so as to generate a pair of chevron changes having different phases in response to the change in the position of the vehicle, and the selected pair of output voltages of the two fluxgates are input to a detection circuit, A detection circuit detects which of a higher peak voltage value and a lower peak voltage value is output first, and detects the passing direction of the vehicle by detecting that the vehicle passes two positions on the lane by two detections. A method for detecting a passing vehicle is provided. According to a sixth aspect of the present invention, two fluxgates are installed on one side or both sides of a road, and one output voltage of each of the two fluxgates is selected so that the pair of output voltages pass through the road. The direction of each fluxgate is adjusted so as to generate a pair of chevron changes having different phases in response to the change in the position of the vehicle, and the selected pair of output voltages of the two fluxgates are input to a detection circuit, The detection circuit detects a change time point at which one of the output voltages exceeds a predetermined threshold voltage and a change time point below the predetermined threshold voltage, and detects that the vehicle passes through four positions on the lane by detecting these four change time points. It is an object of the present invention to provide a passing vehicle detection method characterized by detecting a passing direction of a vehicle. [0011] In a seventh aspect of the present invention, in the first to seventh aspects of the present invention, a first surveillance camera for photographing a rear portion of a vehicle passing in one direction on a lane is installed on a side of the lane. When a first signal light is installed on the side of the road in front of the traveling direction of the vehicle whose rear portion is photographed by the first monitoring camera, and the detection circuit detects a vehicle passing through the road in one direction. The object of the present invention is to provide a passing vehicle detection method, wherein an image of the first surveillance camera is displayed on a television monitor and the first signal light is turned on for a predetermined time. In an eighth aspect of the present invention, in the first to seventh aspects of the present invention, a first surveillance camera for photographing a rear portion of a vehicle passing in one direction in a lane is installed on a side of the lane, A first traffic light is set in front of the traveling direction of the vehicle being photographed by the first surveillance camera, and a second surveillance camera for photographing the rear part of the vehicle passing through the lane in the other direction is located on the side of the lane. A second signal light is installed in front of the traveling direction of the vehicle being photographed by the second surveillance camera, and the detection circuit detects a vehicle passing through the lane in one direction. The video of the first surveillance camera is copied to a television monitor and the first signal light is turned on for a predetermined time,
In addition, when a vehicle passing in the other direction in the lane is detected, the image of the second surveillance camera is displayed on a television monitor and the second signal light is turned on for a predetermined time. Is to provide. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A passing vehicle detection method according to a first embodiment of the present invention will be described with reference to FIGS. In this passing vehicle detection method, as shown in FIG. 1, the flux gate 1 is installed on the side of the lane 2, and one of the arbitrarily selected output voltages Vx of the flux gate 1 when the vehicle 3 passes is determined by: With respect to the output voltage Vn of the flux gate when the vehicle 3 does not pass, a high voltage change region that largely changes and a low voltage change region that slightly changes below the flux gate are generated on the right side. The direction of the gate 1 is adjusted (the right and left sides may be adjusted), and the output voltage Vx of the flux gate 1 is input to the detection circuit 4. And, as shown in FIG.
When the vehicle 3 is going to pass from left to right, the detection circuit 4 detects a voltage Va1 exceeding the threshold voltage Va in the high voltage change area, and then detects the threshold voltage Vb in the low voltage change area. Is detected, it is confirmed that the vehicle 3 has passed through the point a1 and the point b1 in order, and it has been detected that the vehicle 3 has passed from left to right. The first surveillance camera 5 captures the rear of the vehicle 3, and switches the image to a television monitor 6 to display the image of the television program. The first monitor camera 5 also captures the rear of the vehicle 3 in the forward direction of the vehicle 3. The first signal light 7 installed on the side of the lane is lit until the vehicle 3 completely passes and it is safe for people to cross. Also, as shown in FIG. When trying to pass to the left, the detection circuit 4 Detecting a voltage Vb1 lower than the threshold voltage Vb in the low voltage change area, then detecting a voltage Va1 higher than the threshold voltage Va in the high voltage change area, and the vehicle 3 sequentially passes the b2 point and the a2 point. It is detected that the vehicle 3 has passed from right to left, and the second surveillance camera 8 installed on the side of the lane 2 photographs the rear part of the vehicle 3 and displays the image on a television monitor. 6
The vehicle 3 completely passes through the second signal light 9 installed on the side of the lane ahead of the traveling direction of the vehicle 3 whose rear part is photographed by the second surveillance camera 8 while switching to the video of the television program. It lights up until it is safe for a person to cross, and even if the vehicle 3 passes in any direction,
When the vehicle 3 stops within a detection range of the flux gate 1 for a predetermined time, the error indicator lamp 10 is turned on and a buzzer 11 outputs a warning sound. In this embodiment, two points at which the detection circuit 4 confirms the passage of the vehicle 3 when the vehicle 3 attempts to pass from left to right are a1 and b1, and the vehicle 3 attempts to pass from right to left. The two points at which the detection circuit 4 confirms the passage of the vehicle 3 are b2 and a2, and the positions are shifted. FIG. 3 is a circuit diagram for implementing the passing vehicle detection method. This circuit includes a flux gate 1, a detection circuit 4, first and second cameras 5, 8, a television monitor 6, first and second signal lights 7, 9, an error indicator light 10, a buzzer 11, and an image storage circuit 12. And an image selection circuit 13. The flux gate 1 has an annular shape made of a magnetic material,
One excitation coil is wound around an annular core such as an elliptical ring or a rectangular ring, and two detection coils, whose winding directions are opposite to each other, are wound and connected differentially, and an AC excitation current is passed through the excitation coil to generate the core. The alternating magnetic flux penetrates through the insides of the two detection coils in opposite directions, and in this state, when the vehicle, which is a magnetic material, passes through the lane, the terrestrial magnetism around the fluxgate 1 gathers with respect to the vehicle. In response to the movement of the vehicle, the geomagnetism is disturbed, and the alternating magnetic flux penetrating the two detection coils in opposite directions changes in response to the terrestrial magnetism and becomes biased. From both ends of the coil, an AC voltage signal corresponding to the magnitude of the external magnetism, that is, corresponding to the position of the vehicle, and having a frequency twice as high as the excitation current can be taken out. And, by detection after rectification, it is possible to obtain a voltage signal that varies with the position of the vehicle. As a patent document relating to a flux gate, for example, there is Japanese Patent Application No. 4-75083. The detection circuit 4 changes the output voltage Vx of the flux gate 1 to A /
The data is input to the CPU 4b via the D converter 4a. CP
U4b detects the passing vehicle in the order of the flowchart of the program routine shown in FIGS. 4 to 9, and as shown in FIG. 1, when it is confirmed that the vehicle 3 has passed the a1 point and the b1 point in order, the camera Image switching circuit 4
c, a first switching signal is sent so that the video captured by the first surveillance camera 5 is displayed on the television monitor 6, and as shown in FIG. 1, the vehicle 3 passes through the b2 point and the a2 point in order. When it is confirmed that this is the case, a second switching signal is sent to the camera image switching circuit 4c so that the video captured by the second monitoring camera 8 is displayed on the television monitor 6. The CPU 4b turns on the measurement switch 4d as a data value necessary for the execution of the program, so that the output voltage Vx = Vn of the flux gate 1 without the vehicle on the roadway 2 and the vehicle voltage at the a1 or a2 point. Output voltage Vx of flux gate 1 in presence state
= Va and the output voltage Vx = Vb of the flux gate 1 in a state where the vehicle is present at the point b1 or b2. When the error indicator lamp 10 is turned on and the buzzer 11 outputs a warning sound, the manager goes to check the status of the passing vehicle. After the problem is resolved, when the warning cancel switch 4e is turned on, the state returns to a state where normal detection can be performed again. The image storage circuit 12
It is composed of a VTR, FDD, DVD or the like, and stores the same image or an extracted image when the video taken by the first or second camera 5 or 8 is displayed on the television monitor 6. The image selection circuit 13 can selectively display the image stored in the image storage circuit 12 on the television monitor 6 when the user wants to confirm the progress of the vehicle passage with a video later. When the fluxgate 1 is housed in the housing of the first camera 5 or the second camera 8, the wiring can be performed with a single coaxial cable, and a bracket for installing the camera is required. No bracket is required to install the Fluxgate 1
If the direction is adjusted at the time of installation, the characteristic curve of the output voltage is secured unless the camera is moved. Next, a passing vehicle detection method according to a second embodiment of the present invention will be described with reference to FIGS. This passing vehicle detection method, as shown in FIG.
The flux gate 1 is installed on the side of the roadway 2 and the two output voltages V of the flux gate 1 when the vehicle 3 passes.
The direction of the flux gate 1 is adjusted so that x and Vy produce a pair of mountain-shaped changes having different phases in accordance with the position change of the vehicle 3 (by adjusting the directions so that the peaks are shifted in the left and right directions). The two output voltages Vx and Vy of the flux gate 1 are input to the detection circuit 4. Then, as shown in FIG. 10, when the vehicle 3 is going to pass from left to right, the detection circuit 4 detects Vxmax and then Vymax, and the vehicle 3 detects the a1 point and b
Check that you have passed one point in order, and
Is detected from left to right, the first surveillance camera 5 installed on the side of the lane 2 captures the rear of the vehicle 3, and the image is switched to a television program on the television monitor 6 while being photographed. Until the vehicle 3 completely passes the first signal light 7 installed on the side of the lane ahead of the traveling direction of the vehicle 3 whose rear portion is photographed by the first surveillance camera 5, and it becomes safe for people to cross. When the vehicle 3 tries to pass from right to left, the detection circuit 4 detects Vymax and then Vxmax, and the vehicle 3 passes the b1 point and the a1 point in order. After that, it is detected that the vehicle 3 has passed from right to left, and the rear part of the vehicle 3 is photographed by the second surveillance camera 8 installed on the side of the lane 2 and the image is displayed on the television monitor 6. And switch to the TV program, and the second surveillance camera 8 The vehicle 3 completely passes through the second signal light 9 installed on the opposite side of the lane ahead of the traveling direction of the vehicle 3 to be photographed (or on the same side), so that crossing of people is safe. When the vehicle 3 stops within the detection range of the flux gate 1 for a certain period of time, the error indicator lamp 10 is turned on and a buzzer 11 outputs a warning sound. In this embodiment, no matter which direction the vehicle 3 passes, the detection circuit 4
Are the a1 point and the b1 point, which confirm that the vehicle 3 has passed. FIG. 11 is a circuit diagram for implementing the passing vehicle detection method. This circuit includes a flux gate 1, a detection circuit 4, first and second cameras 5, 8, a television monitor 6, first and second signal lights 7, 9, and an error indicator light 10.
, A buzzer 11, an image storage circuit 12, and an image selection circuit 13. The circuit diagram differs from the circuit diagram shown in FIG. 3 in that the detection circuit 4 uses the output voltage V
x and Vy are respectively transferred to the CP via the A / D converter 4a.
The input to U4b and the fact that the CPU 4b detects passing vehicles in accordance with the flowcharts of the program routines shown in FIGS. Next, a passing vehicle detection method according to a third embodiment of the present invention will be described with reference to FIG. In this passing vehicle detection method, a first surveillance camera 5 and a second surveillance camera 8 each containing a fluxgate 1 in a housing are installed on both sides of a lane 2 so that each fluxgate 1 Of the two output voltages, the flux gate 1 is selected such that the pair of output voltages Vx and Vy produce a pair of chevron changes having different phases in accordance with a change in the position of the vehicle 3. (Or the direction may be adjusted so that the peak is shifted to the left or right),
The two output voltages Vx and Vy of the flux gate 1 are input to the detection circuit 4. Other configurations are the same as those in FIG.
0 is substantially the same as the passing vehicle detection method according to the second embodiment shown in FIG. That is, when the vehicle 3 is going to pass from left to right, the detection circuit 4 detects Vxmax and then Vymax, and the vehicle 3 detects the a1 point and the b1 point.
Check that you have passed one point in order, and
Is detected from left to right, the first surveillance camera 5 installed on the side of the lane 2 captures the rear of the vehicle 3, and the image is switched to a television program on the television monitor 6 while being photographed. Until the vehicle 3 completely passes the first signal light 7 installed on the side of the lane ahead of the traveling direction of the vehicle 3 whose rear portion is photographed by the first surveillance camera 5, and it becomes safe for people to cross. When the vehicle 3 tries to pass from right to left, the detection circuit 4 detects Vymax and then Vxmax, and the vehicle 3 passes the b1 point and the a1 point in order. After that, it is detected that the vehicle 3 has passed from right to left, and the rear part of the vehicle 3 is photographed by the second surveillance camera 8 installed on the side of the lane 2 and the image is displayed on the television monitor 6. And switch to the TV program, and the second surveillance camera 8 The vehicle 3 completely passes through the second signal light 9 installed on the opposite side of the lane ahead of the traveling direction of the vehicle 3 to be photographed (or on the same side), so that crossing of people is safe. When the vehicle 3 stops within a detection range of the flux gate 1 for a predetermined time, the error indicator lamp 10 is turned on and a buzzer 11 outputs a warning sound. A flowchart of a program of a CPU according to this embodiment is not shown. The present invention, as a modification of the passing vehicle detection method shown in FIGS. 1 and 2, detects the highest peak voltage and the lowest peak voltage of the flux gate 1 so that the vehicle passes through two positions on the lane 2. It may be detected that the vehicle has passed and the direction in which the vehicle passes. The present invention is a modification of the passing vehicle detection method shown in FIG.
Without detecting the peaks Vxmax and Vymax of y, the output voltages Vx and Vy of the flux gate 1 are changed to the road 2 shown in FIG.
G so that the four points c, e, d, and f correspond
→ i → h → j, the voltage has occurred in the order, or j → h
It may be detected whether or not the voltage has occurred in the order of → i → g to detect that the vehicle has passed four positions on the lane and the direction in which the vehicle has passed. In the present invention, as a modified example of the passing vehicle detection method shown in FIG. 18, the output voltages Vx and Vy of the flux gate 1 are changed without detecting the peaks Vxmax and Vymax of the output voltages Vx and Vy of the flux gate 1 in FIG. Has occurred in the order of g → h → i → j so as to correspond to the four points c, d, e, and f of the lane 2 shown in FIG. It may be detected whether or not the voltage has passed, to detect that the vehicle has passed four positions on the roadway and the direction in which the vehicle has passed. The present invention provides three transition points for the output voltage of the flux gate 1,
Alternatively, the detection circuit 4 may detect whether five or more elapsed points have elapsed. In short, the passing vehicle detection method of the present invention detects two or more fixed positions on the road by detecting the output voltage pattern of one or two flux gates installed on the side of the road by the detection circuit. It is only necessary to detect that the vehicle has passed and the direction in which the vehicle has passed. According to the passing vehicle detection method of the present invention,
This eliminates the need for burying work, greatly reduces the cost of the work, and eliminates problems that occur in the conventional passing vehicle detection method using a loop coil. ADVANTAGE OF THE INVENTION According to the passing vehicle detection method of this invention, the vehicle which can confirm that the vehicle has arrived at a plurality of positions in the traffic direction of the lane without using a fluxgate and can detect the traffic direction of the vehicle can be detected by the CCD camera. The reliability is extremely high as compared with the conventional passing vehicle detection method of photographing a vehicle and detecting the direction of travel by image processing cannot eliminate malfunction. According to the passing vehicle detection methods of the first to sixth inventions of the present application, the present invention can be applied to the case where the vehicle passes only in one predetermined direction, and can be applied to the case where the vehicle passes in either direction. According to the passing vehicle detection method of the seventh invention of the present application, when it is confirmed that the vehicle passes in a predetermined direction, the rear part of the passing vehicle is photographed on a television monitor, or the driving vehicle is driven so that the passing vehicle can pass safely. In addition, necessary signals can be displayed to passersby trying to cross the lane. Further, according to the passing vehicle detection method of the eighth invention of the present application, when it is confirmed that the vehicle passes in either direction, the rear part of the passing vehicle is reflected on the television monitor, Necessary signals can be displayed to the driving vehicle and the pedestrians trying to cross the lane so that they can pass safely.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a passing vehicle detection method according to a first embodiment of the present invention, and explains detection of a passing vehicle when the vehicle moves from left to right. FIG. FIG. 2 is a conceptual diagram illustrating a passing vehicle detection method according to the first embodiment, and illustrating detection of a passing vehicle when the vehicle moves from right to left. FIG. 3 is a circuit diagram for implementing the passing vehicle detection method according to the first embodiment. FIG. 4 shows a flowchart of a first routine of a program stored in a CPU provided in a detection circuit for implementing the passing vehicle detection method according to the first embodiment. FIG. 5 shows a flowchart of a second routine of a program stored in a CPU provided in a detection circuit for performing the passing vehicle detection method according to the first embodiment. FIG. 6 shows a flowchart of a third routine of a program stored in a CPU included in a detection circuit for performing the passing vehicle detection method according to the first embodiment. FIG. 7 shows a flowchart of a fourth routine of a program stored in a CPU provided in a detection circuit for performing the passing vehicle detection method according to the first embodiment. FIG. 8 shows a flowchart of a fifth routine of a program stored in a CPU provided in a detection circuit for performing the passing vehicle detection method according to the first embodiment. FIG. 9 shows a flowchart of a sixth routine of a program stored in the CPU provided in the detection circuit for performing the passing vehicle detection method according to the first embodiment. FIG. 10 is a conceptual diagram illustrating a passing vehicle detection method according to a second embodiment of the present invention, and illustrating detection of a passing vehicle when the vehicle moves from left to right. FIG. 11 is a circuit diagram for implementing a passing vehicle detection method according to the second embodiment. FIG. 12 shows a flowchart of a first routine of a program stored in a CPU provided in a detection circuit for performing the passing vehicle detection method according to the second embodiment. FIG. 13 shows a flowchart of a second routine of a program stored in a CPU provided in a detection circuit for performing the passing vehicle detection method according to the second embodiment. FIG. 14 shows a flowchart of a third routine of a program stored in a CPU provided in a detection circuit for performing the passing vehicle detection method according to the second embodiment. FIG. 15 shows a flowchart of a fourth routine of a program stored in a CPU provided in a detection circuit for performing the passing vehicle detection method according to the second embodiment. FIG. 16 shows a flowchart of a fifth routine of a program stored in a CPU provided in a detection circuit for performing the passing vehicle detection method according to the second embodiment. FIG. 17 shows a flowchart of a sixth routine of a program stored in the CPU provided in the detection circuit for performing the passing vehicle detection method according to the second embodiment. FIG. 18 is a conceptual diagram illustrating a passing vehicle detection method according to a third embodiment of the present invention, in which a passing vehicle is detected when the vehicle moves from left to right. [Description of Signs] 1 ... Fluxgate 2 ... Roadway 3 ... Vehicle 4 ... Detection circuit 4a ... A / D converter 4b ... CPU 4c ... Camera Image switching circuit 4d Measurement switch 4e Warning release switch 5 First surveillance camera 6 TV monitor 7 First signal light 8 Second signal Monitoring camera 9 Second signal light 10 Error indicator light 11 Buzzer 12 Image storage circuit 13 Image selection circuit

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[Procedure amendment] [Date of submission] June 23, 1999 (1999.6.2
3) [Procedure amendment 1] [Document name to be amended] Description [Item name to be amended] 0001 [Correction method] Change [Content of amendment] [0001] The present invention uses a flux gate. The present invention relates to a passing vehicle detection method capable of confirming that a vehicle has reached a plurality of positions in a traffic direction of a lane, and detecting a traffic direction of the vehicle. Further, the invention of the present application is necessary for a driver and a pedestrian trying to cross the lane so that the rear part of the passing vehicle can be displayed on a television monitor after confirming the traffic direction of the lane. The present invention relates to a passing vehicle detection method capable of displaying various signals. [Procedure amendment 2] [Document name to be amended] Description [Item name to be amended] 0004 [Correction method] Change [Content of amendment] The present invention has been devised in view of the above-mentioned points. It is possible to provide a passing vehicle detection method capable of confirming that a vehicle has reached a plurality of positions in a traffic direction of a roadway and detecting the traffic direction of the vehicle, and eliminating the disadvantages of using a loop coil. The purpose is. Further, the invention of the present application is necessary for a driver and a pedestrian trying to cross the lane so that the rear part of the passing vehicle can be displayed on a television monitor after confirming the traffic direction of the lane. It is an object of the present invention to provide a passing vehicle detection method capable of displaying various signals. [Procedure amendment 3] [Document name to be amended] Description [Item name to be amended] 0019 [Correction method] Change [Contents of amendment] According to the passing vehicle detection method of the present invention,
This eliminates the need for burying work, greatly reduces the cost of the work, and eliminates the problems that occur in the conventional passing vehicle detection method using a loop coil. ADVANTAGE OF THE INVENTION According to the passing vehicle detection method of this invention, the vehicle which can confirm that the vehicle has arrived at a plurality of positions in the traffic direction of the lane without using a flux gate and can detect the traffic direction of the vehicle can be detected by the use of the CCD camera. The reliability is extremely high as compared with the conventional passing vehicle detection method of photographing a vehicle and detecting the direction of travel by image processing cannot eliminate malfunction. According to the passing vehicle detection methods of the first to sixth aspects of the present invention, the present invention can be applied to the case where the vehicle passes only in one predetermined direction, and can be applied to the case where the vehicle passes in either direction. According to the passing vehicle detection method of the seventh invention of the present application, when it is confirmed that the vehicle passes in a predetermined direction, the rear part of the passing vehicle can be photographed on a television monitor, or the driver can use the vehicle so that the passing vehicle can pass safely. In addition, necessary signals can be displayed to passersby trying to cross the lane. Further, according to the passing vehicle detection method of the eighth invention of the present application, when it is confirmed that the vehicle passes in either direction, the rear part of the passing vehicle is reflected on the television monitor, The necessary signals can be displayed to the driver and passers-by trying to cross the lane so that they can pass safely.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Shinobu Ishikawa             4-42-13 Kameido, Koto-ku, Tokyo (72) Inventor Koji Onuma             3-48, Higashi 3-chome, Kashiwa-shi, Chiba F term (reference) 2G017 AD04 AD42 BA05 BA18                 5H180 AA01 CC04 CC19 DD02 GG01                       JJ06

Claims (1)

Claims: 1. A vehicle detects two fixed positions on a road by detecting a pattern of an output voltage of one or two flux gates installed on a side of the road by a detection circuit. A passing vehicle detection method, comprising detecting a passing direction and detecting a passing direction of the vehicle. 2. A fluxgate is installed at the side of the road so that one output voltage arbitrarily selected by the fluxgate when the vehicle passes is determined by the output voltage of the fluxgate when the vehicle does not pass. The direction of the flux gate is adjusted so that a high voltage change region that changes more and a low voltage change region that changes less are generated, and the selected one output voltage of the flux gate is input to a detection circuit. The detection circuit detects which of the voltage higher than the threshold voltage of the high voltage change area and the voltage lower than the threshold voltage of the low voltage change area is output first, and two detections of the roadway are performed by the two detections. A passing vehicle detection method, wherein a passing direction of the vehicle is detected by detecting that the vehicle passes a fixed position. 3. A fluxgate is provided on a side of a road so that two output voltages of the fluxgate when a vehicle passes through the vehicle generate a pair of mountain-shaped changes having different phases in accordance with a change in the position of the vehicle. Adjusting the direction of the flux gate, inputting the two output voltages of the flux gate to a detection circuit, and detecting which of the high peak voltage value and the low peak voltage value is output first by the detection circuit. A passing vehicle detection method, comprising: detecting that a vehicle passes two positions on a lane by detecting the direction of the vehicle. 4. A fluxgate is installed on a side of a road so that two output voltages of the fluxgate when the vehicle passes through cause a pair of chevron changes having different phases in accordance with a change in the position of the vehicle. Adjusting the direction of the flux gate, inputting the two output voltages of the flux gate to a detection circuit, and using the detection circuit to determine when each of the output voltages of the flux gates exceeds and falls below a predetermined threshold voltage. A passing vehicle detection method, comprising: detecting that the vehicle has passed through four positions on the lane by detecting these four change points, and detecting the passing direction of the vehicle. 5. A method in which two fluxgates are installed on one side or both sides of a lane, and one output voltage of each of the two fluxgates is selected so that the pair of output voltages change the position of a vehicle passing through the lane. The direction of each of the flux gates is adjusted so as to generate a pair of chevron changes having different phases in response to the above, the selected pair of output voltages of the two flux gates are input to a detection circuit, and a high peak is detected by the detection circuit. Passing characterized by detecting which of the voltage value and the lower peak voltage value is output first, detecting that the vehicle passes through two positions on the lane by two detections, and detecting the passing direction of the vehicle. Vehicle detection method. 6. A method in which two fluxgates are installed on one side or both sides of a lane, and the output voltage of one of the two fluxgates is selected to change the position of a vehicle passing through the lane. The direction of each flux gate is adjusted so as to generate a pair of chevron changes having different phases in response to the above, and the selected pair of output voltages of the two flux gates are input to a detection circuit. The change time when the output voltage exceeds the predetermined threshold voltage and the change time when the output voltage falls below the threshold voltage are detected, and by detecting these four change times, it is detected that the vehicle passes through four positions on the lane, and the passing direction of the vehicle is changed. A passing vehicle detection method, comprising: detecting a passing vehicle. 7. A first surveillance camera for photographing a rear portion of a vehicle passing through a lane in one direction is installed on a side of the lane, and a traveling direction of the vehicle whose rear portion is photographed by the first surveillance camera. A first signal light is installed on the side of the lane in front, and when the detection circuit detects a vehicle passing in the lane in one direction, an image of the first surveillance camera is displayed on a television monitor. The passing vehicle detection method according to any one of claims 1 to 6, wherein the first signal light is turned on for a predetermined time. 8. A first surveillance camera for photographing a rear part of a vehicle passing in one direction on a lane is installed on a side of the lane, and a forward direction of the vehicle being photographed by the first surveillance camera. A first traffic light is installed in the vehicle, and a second surveillance camera for photographing the rear of the vehicle passing through the traffic lane in the other direction is installed on the side of the traffic lane, and photographed by the second surveillance camera. A second signal light is installed in front of the traveling direction of the vehicle, and when the detection circuit detects a vehicle passing in the one direction in the lane, the image of the first surveillance camera is displayed on a television monitor and Turn on the first signal light for a predetermined time,
In addition, when a vehicle that passes through the lane in another direction is detected, an image of the second monitoring camera is displayed on a television monitor and the second signal light is turned on for a predetermined time. ] The passing vehicle detecting method according to any one of claims 6 to 6.