JP2001118184A - Radio wave measuring vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio wave measuring vehicle dissolving an inconvenience that a lane is to be closed for measuring the intensity of a radio wave outputted to a travel vehicle and it cannot be measured in rough weather since a measuring person measures it in a communication area in a conventional case in the nonstop rate collection system of a toll road. SOLUTION: A radio measuring vehicle has a radio measuring system formed of an on-vehicle antenna receiving a radio wave for measuring the intensity of the radio wave irradiated to a travel vehicle, a frequency and a communication area, a radio wave measuring circuit measuring the intensity of the radio wave from the on-vehicle antenna, a recording device recording the output signal of the radio measuring circuit and an output device outputting the output signal of the radio measuring circuit to a host device. Thus, inconvenience can be dissolved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-stop toll collection system for toll roads, and a vehicle-mounted device mounted on a vehicle identified from a roadside antenna transmits a vehicle to identify a vehicle entering a measurement zone. The present invention relates to a radio wave measuring vehicle for measuring the strength, frequency, communication area, and the like of radio waves.

[0002]

2. Description of the Related Art When traveling on a toll road, traffic congestion rarely occurs unless there is a problem such as an accident or the like during construction, but at a toll booth, the vehicle is temporarily stopped and traveled. In addition, the staff confirms the vehicle type and the like, and the toll collection corresponding to the traveling section, the vehicle type, and the like is performed, so that it often takes time and congestion occurs. For this reason, a non-stop toll collection system has been developed, in which radio waves are transmitted to the running vehicle to check the travel section of the vehicle, the type of vehicle, etc., and the collection of fees is performed by bank settlement or the like. It has been put to practical use in the department.

FIG. 2 is a diagram showing a typical configuration of a data communication unit between a roadside device and an on-vehicle device in such a nonstop toll collection system for toll roads. As shown in the figure, a vehicle detector 1 constituting a roadside device includes a traveling road surface 2.
0, and pass between the vehicle detectors 1 by detecting light emitted from the vehicle detector 1 on one side by an optical sensor provided on the vehicle detector 1 on the other side. Of the vehicle 8 entering the communication area 5, which is a measurement zone, is detected. A roadside antenna 2 which constitutes a roadside device like the vehicle detector 1 is mounted under a canopy of a tollgate or the like, is mounted on a vehicle 8 by transmitting radio waves, and is connected to a vehicle-mounted device 3 for identifying the vehicle 8. Wireless data communication is performed between them to acquire data specifying the vehicle 8.

The roadside control device 4 controls a roadside device including the vehicle detector 1 and the roadside antenna 2 and the like, and reports the communication result between the roadside antenna 2 and the vehicle-mounted device 3 to a host device, that is, the number of running vehicles, the number of vehicles, and the like. The data of the type or the like or the roadside control device 4 such as a computer for acquiring the vehicle 8 acquired by the roadside antenna 2 and proceeding based on the data, and performing the payment and the like corresponding to the vehicle type and the traveling section, etc. It has the function of transmitting to the device arranged on the upper side. The communication area 5 is an area where communication can be performed between the roadside antenna 2 and the vehicle-mounted device 3 on the traveling road surface 20 of the vehicle 8 that is entering.

[0005] As described above, the non-stop toll collection system for toll roads is configured, so that when the vehicle 8 equipped with the vehicle-mounted device 3 enters the toll booth, the vehicle detector 1 on one side detects the vehicle on the other side. By blocking the optical signal emitted to the optical sensor of the device 1, a detection signal detecting that the vehicle 8 has entered the communication area 5 is transmitted to the roadside control device 4, and the roadside control device 4 A signal for outputting a radio wave to the roadside antenna 2 and the communication area 5 is transmitted.

As described above, the vehicle-mounted device 3 mounted on the vehicle 8
Enters the communication area 5, data communication is performed between the roadside antenna 2 and the vehicle-mounted device 3, and the communication result is transmitted from the roadside control device 4 to the above-described higher-level device and received by the higher-level device. Based on the result, necessary recording, calculation, and the like are performed thereafter, and toll collection of the vehicle 8 that passes without requiring any manpower and without stopping the vehicle 8 is performed.
Creation of identification data and the like can be performed.

In the roadside antenna 2 of the non-stop toll collection system as described above, since aging occurs inevitably, it is necessary to perform regular maintenance and inspection in order to always obtain accurate communication results. When performing regular maintenance and inspection, it is necessary to measure the intensity, frequency, communication area, and the like of radio waves emitted from the roadside antenna 2.

Since these measurements need to be carried out by an operator carrying the measuring equipment in the communication area 5 of the traveling road surface 20, the lane of the traveling road surface 20 provided with the roadside antenna 2 for maintenance and inspection is provided. In a toll booth where there is a lot of traffic or no spare lane, it is necessary to close the lane for these measurement operations, and the lane cannot be closed for the measurement work, which may cause a problem in the accuracy of the communication result of the roadside antenna 2. . further,
Measuring instruments for measuring the intensity and frequency of radio waves are expensive and highly accurate, and there has been a problem that these measuring operations cannot be performed on bad weather such as rainy weather.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned disadvantages that occur in maintenance and inspection for measuring the strength, frequency or communication area of a radio wave of a roadside antenna in a conventional non-stop toll collection system. The vehicle is equipped with a measuring device that measures the strength of the radio wave of the roadside antenna, etc., travels in the same manner as a normal vehicle, and the strength, frequency, and communication range of the radio wave transmitted from the roadside antenna when traveling in the communication area. Without having to close the lane, which has a large effect, it is possible to determine whether the roadside antenna is operating normally even in bad weather, making it easier to perform regular maintenance and inspection. It is an object to provide a radio wave measuring vehicle.

[0010]

Therefore, the first radio wave measuring vehicle of the present invention has the following means.

(1) To measure the intensity and frequency of a radio wave applied to a vehicle traveling on a toll road, a communication area in which a vehicle is detected by irradiating the radio wave, and the like. From an in-vehicle antenna that receives radio waves output from a roadside antenna that detects a signal, a radio wave measurement circuit that receives a signal received by the in-vehicle antenna, and measures the communication area from the strength, frequency, and presence or absence of reception And an output device for outputting an output signal from the radio wave measurement circuit to a host device. In addition, it is preferable to provide 1 to n in-vehicle antennas for receiving radio waves for measuring the intensity, frequency, and communication area of the radio waves.

(A) The radio wave measuring vehicle of the present invention has the above (1)
Equipped with a radio measurement system that measures, records, and outputs the intensity, frequency, and communication area of radio waves emitted from a roadside antenna to vehicles traveling on a toll road to a higher-level device. While traveling on nearby toll roads, it is possible to measure the intensity of radio waves radiated to vehicles, and the intensity, frequency, and communication area of radio waves irradiated change over time. The work that needs to be performed regularly for the purpose is without closing the lane, and it is possible to perform measurement with precision measuring equipment that is difficult to use in bad weather even in bad weather,
A predetermined radio wave intensity or the like is transmitted from the roadside antenna, and it is possible to frequently confirm whether or not the traveling vehicle is correctly detected.

Further, the measurement result can be determined in the radio wave measuring vehicle based on the data recorded in the recording device, and it is not necessary to arrange the measurement data at a toll booth or the like. Can be quickly re-measured, and the time required for on-site measurement can be greatly reduced.

Further, a second radio wave measuring vehicle according to the present invention comprises:
In addition to the above-mentioned means (1), the following means was used.

(2) A detection value detected by a sensor installed in a driving unit of the radio wave measuring vehicle, for example, a tachometer mounted on an axle, is input, and a detection signal for detecting a moving amount of the radio wave measuring vehicle is input. A movement measurement circuit for outputting to the control circuit is provided.

The radio wave measuring vehicle according to the present invention is provided with a movement measuring circuit capable of measuring the amount of movement of the radio wave measuring vehicle in addition to the above (a) by means of the above (2), and outputs the result to the control circuit. As a result, the radio wave intensity and the like that change with the speed of the radio wave measuring vehicle are corrected by the moving distance of the radio wave measuring vehicle, and the same result can be obtained even if the speed of the radio wave measuring vehicle changes. The intensity of radio waves emitted from a vehicle traveling from above and the measurement result (distribution) of the communication area can be made independent of the speed of the radio wave measurement vehicle, and the accurate intensity of the radio waves emitted to the vehicle from the roadside antenna , The measurement result of the communication area can be obtained.

A third radio wave measuring vehicle according to the present invention comprises:
In addition to the above-described means (1), or the above-mentioned means (1) and (2), the following means are provided.

(3) A vehicle detector installed on the outer peripheral surface of the radio wave measuring vehicle and installed on the side of the traveling road surface on which the vehicle performing the radio wave measurement travels, and receiving light emitted from the vehicle detector. And a light receiving device for outputting a detection signal for detecting a traveling position of the radio wave measuring vehicle to the control circuit. In addition,
It is preferable to provide 1 to n light receiving devices at required positions on the outer peripheral surface of the radio wave measuring vehicle as needed.

The radio wave measuring vehicle of the present invention receives (a) the light emitted from the vehicle detector in addition to (a) or (a) and (b) described above by means of (3). By installing a light receiving device that detects the traveling position of the radio wave measurement vehicle and outputting it to the control circuit, the relative position between the radio wave intensity waveform and the position where the vehicle detector is installed becomes clear, and the parallel movement (Position shift) and the like can be confirmed.

A fourth radio wave measuring vehicle according to the present invention comprises:
In addition to the above-mentioned means (3), the following means was used.

(4) A vehicle detector for irradiating light received by the light receiving device is installed at least on a side of a traveling road surface that enters / exits a communication area of a vehicle to be subjected to radio wave measurement. At least entry / exit to the area can be detected.

According to the radio wave measuring vehicle of the present invention, in addition to the above (c) by means of the above (4), (d) at least a vehicle is provided at a side of a traveling road surface which enters / exits a communication area of a vehicle to perform radio wave measurement. A detector is installed, and the traveling time of the radio wave measuring vehicle passing through the side of the vehicle detector can be measured accurately. The relative position becomes clearer, and precise confirmation of parallel movement (positional deviation) can be performed.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the radio wave measuring vehicle according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a radio measurement system mounted on a radio measurement vehicle as a first embodiment of the radio measurement vehicle of the present invention. FIG. 2 is a radio measurement system shown in FIG. 1 and a conventional non-stop toll collection system. FIG. 3 is a typical configuration diagram of a data communication unit between the roadside device and the on-vehicle device in FIG. 3, and FIG. 3 is a diagram showing the relationship between the vehicle speed measured and recorded by the radio wave measurement system shown in FIG. is there.

In FIG. 1, the roadside antenna 2 shown in FIG.
The output radio wave 6 is received by an on-vehicle antenna 10 installed in a radio wave measurement vehicle 9 running in the communication area 5. The on-vehicle antenna 10 has 1 to n antennas 10 according to its necessity, that is, in order to improve the reception accuracy of the radio wave 6 output from the roadside antenna 2 measured by the radio wave measuring vehicle 9. Is preferably attached to a plurality of locations of the radio wave measuring vehicle 9.

Also, a vehicle-mounted antenna 10 consisting of 1 to n antennas
The radio wave 6 received by the radio wave measuring circuit 11 as a radio wave measuring device is used to measure the radio wave intensity, frequency, presence / absence of communication, and the like transmitted from the roadside antenna 2, and the measured data is transmitted to the control circuit 12. Can be The measured data sent to the control circuit 12 is sent from the control circuit 12 to the recording device 13, and a waveform of the radio wave intensity according to the speed of the radio wave measuring vehicle 9 as shown in FIG. Control circuit 12
Are also sent to the output device 14 and sent from the output device 14 to the above-described higher-level device. The measurement data once recorded in the recording device 13 can be arbitrarily output to the output device 1 as needed.
4 is enabled.

Since the radio wave measuring system mounted on the radio wave measuring vehicle 9 according to the present embodiment is configured as described above, in the conventional radio wave measurement of the roadside antenna 2, a measurer carrying the measuring equipment is required. Since the user entered the communication area 5 as a measurement point and measured the intensity, frequency, or communication area 5 of the radio wave transmitted from the roadside antenna 2,
It is possible to solve the problem that the lane is closed on the traveling road surface 20 on which the roadside antenna 2 for performing the maintenance and inspection is provided and that the radio wave cannot be measured on a bad weather day.

That is, in the radio wave measuring vehicle 9 of the present embodiment, the radio wave measuring system is mounted and the vehicle travels in the communication area 5 in the same manner as the normal vehicle 8, so that it is not necessary to close the lane and the measurement is performed. Can measure the radio wave transmitted from the roadside antenna 2 without being affected by the weather, and can solve the problems caused by the related art.

Further, since the result measured by the radio wave measuring vehicle 9 of the present embodiment can be recorded in the recording device 13, there is no need to arrange measurement data at the toll booth site where radio wave measurement is performed. Measurement work on site can be shortened.

Next, FIG. 4 is a block diagram showing a radio wave measuring system mounted on a radio wave measuring vehicle as a second embodiment of the radio wave measuring vehicle according to the present invention, and FIG. 5 is measured by the radio wave measuring system shown in FIG. It is a figure which shows the recorded vehicle speed and radio field intensity of the radio wave measurement vehicle. As shown in the figure, similarly to the radio wave measuring system shown in FIG. 1 showing the first embodiment, a radio wave 6 output from the roadside antenna 2 is received by a plurality of 1 to n vehicle-mounted antennas 10. You. In addition, the on-vehicle antenna 10 of the present embodiment can also be mounted on the
It is preferable to attach to a plurality of locations.

The radio wave 6 received by the on-vehicle antenna 10 is measured by a radio wave measuring circuit 11 for radio wave intensity, frequency, presence / absence of communication, etc., and the measured data is sent to a control circuit 12 for further control. The measured data sent to the circuit 12 is sent to the recording device 13 for recording, and is output from the control circuit 12 to the output device 14. The measurement data sent to the output device 14 And the measurement data once recorded in the recording device 13 can be arbitrarily output to the output device 14 as necessary, similarly to the radio wave measurement system shown in FIG.

Further, in the radio wave measuring vehicle 9 of the present embodiment, the moving distance of the radio wave measuring vehicle 9 is measured by the movement measuring circuit 16 from the detection value detected by the driving unit 15 of the radio wave measuring vehicle 9, The measured moving distance signal is transmitted to the control circuit 12, transmitted to the recording device 13, and recorded together with the radio wave intensity according to the speed of the radio wave measuring vehicle 9.

In the radio wave measuring vehicle 9 of the present embodiment,
Because of such a configuration, similar to the radio wave measuring vehicle 9 in the first embodiment, the problem that the lane cannot be closed and the radio wave cannot be measured on bad weather in the prior art are as follows.
The advantage of running the radio wave measuring vehicle 9 with the radio wave measuring system is that it is not necessary to close the lane and it is possible to perform the radio wave measurement without being affected by the weather. Since the data can be recorded on the recording device, there is no need to arrange measurement data at the tollgate site, and there is an advantage that the measurement time at the site can be reduced.

Further, in the first embodiment, since only the radio wave measuring system is mounted, FIGS.
As shown in FIG. 5B, the measurement result (distribution) of the radio wave intensity and the communication area differs depending on the traveling speed of the radio wave measurement vehicle 9, but in the present embodiment, the driving of the radio wave measurement vehicle 9 is performed. By adding a movement measurement circuit 16 that can measure the moving distance of the radio wave measurement vehicle 9 according to the detection value from the unit 15, the signal is transmitted from the roadside antenna 2 regardless of the traveling speed of the radio wave measurement vehicle 9. It becomes possible to measure the intensity of the radio wave or the communication area 5 or the like.

That is, FIG. 3 (a) shows an example of a measurement result when the traveling speed is low, which is an example of a radio field intensity measurement result when only the radio wave measurement system shown in the first embodiment is mounted on the radio wave measurement vehicle 9. FIG. 3 (b) shows the measurement result when the speed is high.
As is clear from the comparison, the waveform of the radio wave intensity measured by the traveling speed of the radio wave measuring vehicle 9 differs.

On the other hand, in the present embodiment, the distance traveled by the radio wave measurement vehicle 9 is measured by the movement measurement circuit 16 based on the detection value detected by the drive unit 15 of the radio wave measurement vehicle 9, and the control circuit 12 5 (a) corresponding to FIG. 3 (a) which is a measurement result when the traveling speed is low, and FIG. 5 (corresponding to FIG. 3 (b) which is a measurement result when the traveling speed is high. b) For each of the measured results shown,
As shown in FIG. 5C showing the result of correcting the horizontal axis with the moving distance of the radio wave measuring vehicle 9, the same result is obtained even if the traveling speed of the radio wave measuring vehicle 9 at the time of measurement is different. It is possible to measure so that it can be obtained.

Next, FIG. 6 is a block diagram showing a radio wave measuring system mounted on a radio wave measuring vehicle 9 as a third embodiment of the radio wave measuring vehicle of the present invention, and FIG. 7 is a radio wave measuring system according to this embodiment. FIG. 8 is a diagram illustrating an example of a light receiver 17 attached to the car 9, and FIG. 8 is a diagram illustrating an example of a radio wave measurement result measured by the radio wave measurement system illustrated in FIG.

In the radio wave measuring system mounted on the radio wave measuring vehicle 9 of the present embodiment, the radio wave 6 output from the roadside antenna 2 is received by the on-vehicle antenna 10 as in the first embodiment, and In-vehicle antenna 10 for receiving
Are preferably attached to a plurality of locations of the radio wave measuring vehicle 9 depending on the necessity. The radio wave received by the on-vehicle antenna 10 was measured by a radio wave measurement circuit 11 for radio wave intensity, frequency, the presence or absence of communication, and the like, and the measured data was sent to the control circuit 12 and sent to the control circuit 12. Measurement data is recorded by the recording device 13 and output from the output device 14 to a higher-level device. Further, data once recorded in the recording device 13 can be arbitrarily output to the output device 14. This is the same as the radio wave measurement system shown in FIG.

Further, in the radio wave measuring vehicle 5 according to the present embodiment, a light receiver 17 is provided on the side surface as shown in FIG. The light receiver 17 detects an optical signal emitted from the vehicle detector 1 installed on the roadside, and the light detection signal detected by the light receiver 17 is transmitted to the control circuit 1.
2 is recorded on the recording device 13. The light receiver 17 can be attached to a plurality of places on the side of the vehicle other than the place shown in FIG. 7 as necessary.

That is, as shown in FIG. 7, the light receivers 17 are mounted at three positions, that is, the front end, the center, and the rear end of the side surface of the vehicle. It may be provided. By installing the light receiver 17 and receiving an optical signal from the vehicle detector 1, it is possible to determine the traveling position of the radio wave measuring vehicle 9.

In the radio wave measuring vehicle 9 of the present embodiment,
Similar to the radio measurement vehicle 9 according to the first embodiment, the problem that the lane cannot be closed and the radio measurement cannot be performed on bad weather in the prior art is similar to the radio measurement system shown in FIG. Not only does it not have to close lanes and can measure radio waves without being affected by the weather, but also records the measurement results on a recording device. Therefore, it is not necessary to arrange the measurement data at the tollgate site, and the same operation and effect as those of the first embodiment, which can reduce the measurement time at the site, can be achieved.

Further, in the first embodiment, the in-vehicle antenna 10, the radio wave measuring circuit 11, the control circuit 12, the recording device 1
3 and the output device 14, only the radio wave measurement system is installed.
Start / end position and the relative positional relationship between the roadside device including the vehicle detector 1 and the roadside antenna 2 and the radio wave measuring vehicle 9 are unclear, and the peak position of the radio wave intensity and the start / end position of the communication area 5 In the case where the vehicle moves in parallel (positional displacement), a problem that cannot be determined only by the radio wave measurement system has occurred. In the present embodiment, however, the position of the radio wave measurement vehicle 9 is measured so that the vehicle can be measured. A light receiver 17 capable of detecting the optical signal from the detector 1 is added to the side of the vehicle to solve this problem.

As described in the second embodiment, when only the radio wave measuring system shown in the first embodiment is mounted on the radio wave measuring vehicle 9, one of the results of the radio wave intensity measurement when the predetermined speed is low is used. As shown in FIG. 3A and the measurement result when the traveling speed is high, the waveform of the radio wave intensity measured according to the traveling speed of the vehicle is different, and furthermore, the first embodiment Although the relative positional relationship between the vehicle detector 1 and the roadside device such as the roadside antenna 2 is not clear from the radio wave measurement system of the embodiment, the radio wave in the case of the present embodiment in which the radio wave measurement system and the light receiver 17 are mounted is not clear. As shown in FIGS. 8A and 8B, which are examples of the intensity measurement results, the measurement results when the traveling speed of the vehicle is low and the measurement results when the traveling speed of the vehicle 9 is high are shown in FIG. 8B, respectively. In the graph showing the results , Photodetector 1 mounted on the vehicle 9
The position at which the optical signal 7 is detected from the vehicle detector 1 installed on the road side is recorded (displayed).

Thus, the relative positional relationship between the radio wave intensity waveform and the position where the vehicle detector 1, which is the roadside device, is installed is clarified, and it is possible to confirm a displacement or the like. Furthermore, the positional relationship between the vehicle detector 1 and the roadside antenna 2 is usually determined at the time of installation, and if the relative positional relationship between the radio wave intensity waveform and the vehicle detector 1 becomes clear, it is inevitable. Although the relative positional relationship between the radio wave intensity waveform and the roadside antenna 2 is also unambiguously determined, in the present embodiment, as shown in FIG. 9, the vehicle detector 1 and the roadside antenna 2 in the conventional non-stop toll collection system.
As is clear from the comparison with the configuration diagram shown in FIG. 2 which is a configuration of the data communication unit between the roadside device and the on-vehicle device 3 composed of the above, the vehicle detector 7 can be added as the roadside device.

That is, by detecting the optical signal from the added vehicle detector 7 with the photodetector 17 attached to the vehicle, in addition to the one shown in FIG. , The passage time of the radio wave measuring vehicle 9 passing through the vehicle 9 can be detected, and the position of the vehicle 9 can be detected with higher accuracy. In addition, the vehicle detector 7 to be additionally provided in addition to the vehicle detector 1 may be provided at the exit portion of the vehicle in the communication area 5 of the traveling road surface 20, but may be provided at a position other than this position. Things.

Next, FIG. 10 is a block diagram showing a radio wave measurement system mounted on a radio wave measurement vehicle as a fourth embodiment of the radio wave measurement vehicle of the present invention, and FIG. FIG. 9 is a diagram showing a measured radio wave measurement result side. In the radio wave measurement system mounted on the radio wave measurement vehicle 9 of the present embodiment, a radio wave measurement system is provided similarly to the first embodiment, and the radio wave 6 output from the roadside antenna 2 is transmitted by the vehicle-mounted antenna 10. The in-vehicle antenna 10 which receives and receives the signal can be transmitted by the radio wave measuring vehicle 9 depending on its necessity.
It is attached to multiple places.

The electric wave received by the on-vehicle antenna 10 is measured by an electric wave measuring circuit 11 for electric wave intensity, frequency, presence or absence of communication, and the like, and the measured data is sent to a limiting circuit 12. Further, the measured data sent to the control circuit 12 is recorded by the recording device 13 and output from the output device 14 to the host device.
1 can be arbitrarily output to the output device 14 in the same manner as the radio wave measuring system shown in FIG.

Further, in the radio wave measuring vehicle 9 of the present embodiment, similarly to the second embodiment, the distance traveled by the vehicle 9 is determined from the detection value detected by the drive unit 15 of the radio wave measuring vehicle 9. The measured travel distance signal is transmitted to the control circuit 12, transmitted from the control circuit 12 to the recording device 13, and recorded together with the radio wave intensity according to the speed of the radio wave measurement vehicle 9.

In the radio wave measuring vehicle 9 of the present embodiment,
As in the third embodiment, the light receiving device 1
The optical signal output from the vehicle detector 1 installed on the road side is detected by the photodetector 17, and the photodetection signal of the photodetector 17 is transmitted to the control circuit 12 and recorded. Recorded in the device 13. The light receiver 17 is mounted at a plurality of places of the vehicle 8 as shown in FIG. 7 depending on the necessity. However, the light receiver 17 may be installed at a place other than the side of the vehicle 8 shown in FIG. Conceivable.

Since the radio wave measuring system mounted on the radio wave measuring vehicle of the present embodiment is configured as described above,
In the prior art, there was a problem that the lane could not be closed or the radio wave could not be measured on bad weather. However, by running the radio wave measurement system 9 on the radio wave measurement vehicle 9 of the present embodiment, As in the first embodiment, it is not necessary to close the lane, and a radio wave measurement is performed to determine whether a radio wave of a predetermined intensity and frequency is transmitted from the roadside antenna to the predetermined communication area 5 without being affected by the weather. It becomes possible.
Further, since the measurement result can be recorded in the recording device 13, there is no need to arrange measurement data at the tollgate site, and the measurement time at the site can be reduced.

When only the radio wave measurement system is mounted, the measurement results (distribution) of the radio wave intensity and the communication area 5 may differ depending on the traveling speed of the vehicle, or the peak position of the radio wave intensity or the start of the communication area 5 / End position and vehicle detector 1
And the positional relationship with the roadside device such as the roadside antenna 2 is unclear.
When the end position moves in parallel (position shift), it cannot be determined only by the radio wave measurement system, but in the present embodiment, like the radio wave measurement vehicle 9 of the second and third embodiments, In addition to the radio wave measurement system, the mobile measurement circuit 6 that can measure the moving distance of the radio wave measurement vehicle 9 and the light receiver 17 that can detect the optical signal from the vehicle detector 1 so that the position of the radio wave measurement vehicle 9 can be measured. Added.

As a result, FIG. 3A shows an example of the radio wave intensity measurement result when the radio wave measuring vehicle 9 is equipped with only the radio wave measuring system. Measurement Results Compared to the one shown in FIG. 3 (b), the waveform of the radio wave intensity measured by the traveling speed of the vehicle 9 is different, and the light emitted from the vehicle detector 1 installed on the roadside and the light received The received light signal output from the received light receiver 17 to the control circuit 12 causes the
The relative position relationship between the measurement position and the roadside device at the time is not clear.

FIG. 11 shows an example of the result of radio wave intensity measurement when the radio wave measuring system, the movement measuring circuit 16 and the light receiving device 17 are mounted on the radio wave measuring vehicle 9, and FIG. 11 (a) shows that the running speed of the vehicle 9 is slow. FIG. 3A is a measurement result of the case,
FIG. 11B shows a case where the traveling speed of the vehicle 9 is high.
FIG. 11B shows the measurement results shown in FIG.
FIG. 11 (c) shows a state similar to FIG. 11 (a) and FIG.
The horizontal axis of the measured result shown in FIG.
This shows that the same result can be measured even if the traveling speed of the vehicle 9 is different.

Furthermore, the vehicle 9 is displayed in the radio wave intensity measurement result graph.
The position at which the photodetector 17 attached to the vehicle detects the optical signal from the roadside vehicle detector 1 is recorded (displayed), so that the relative positional relationship between the radio wave intensity waveform and the roadside device which is the vehicle detector 1 Becomes clear, and it becomes possible to confirm the displacement and the like. Furthermore, the positional relationship between the vehicle detector 1 and the roadside antenna 2 is normally determined at the time of installation, and if the relative positional relationship between the radio wave intensity waveform and the vehicle detector 1 becomes clear, the radio wave intensity waveform will inevitably change. The relative positional relationship with the roadside antenna 2 is also determined.

[0054]

As described above, the radio wave measuring vehicle of the present invention uses the radio wave emitted from the roadside antenna to measure the intensity, frequency, and communication area of the radio wave applied to the traveling vehicle. From an in-vehicle antenna to receive, from an in-vehicle antenna receiving signal, a radio wave measurement circuit that measures the communication area based on the strength, frequency, and presence or absence of radio waves, a recording device that records the output signal from the radio wave measurement circuit, And an output device for outputting the output signal to the host device.

As a result, the intensity of radio waves emitted to the vehicle can be measured in the radio wave measurement vehicle, and the periodic inspection work of the roadside antenna that changes over time can be performed without closing the lane and accurately even in bad weather. The measurement can be performed by using a simple measuring device, and a predetermined radio field intensity or the like is constantly transmitted from the roadside antenna, and the detection of the traveling vehicle can be accurately performed. In addition, the measurement results can be judged inside the radio wave measurement vehicle by the recording data of the recording device, there is no need to arrange the measurement data externally, and if measurement fails, etc., it can be re-measured quickly and the measurement work time on site Can be greatly reduced.

Further, the radio wave measuring vehicle of the present invention inputs a detection value detected by a sensor installed in a driving unit of the radio wave measuring vehicle, and outputs a detection signal for detecting a moving amount of the radio wave measuring vehicle to a control circuit. A movement measurement circuit for outputting is provided.

As a result, the radio wave intensity or the like that changes depending on the speed of the radio wave measuring vehicle can be corrected by the moving distance of the radio wave measuring vehicle. The measurement results of the radio wave intensity, the communication area, and the like are not affected by the speed, and accurate measurement results of the radio wave intensity, the communication area, and the like can be obtained.

The radio wave measuring vehicle of the present invention is installed on the outer peripheral surface of the radio wave measuring vehicle, receives light emitted from a vehicle detector installed on the side of the traveling road surface, and determines the traveling position of the radio wave measuring vehicle. A light receiving device for outputting the detected detection signal to the control circuit is provided.

As a result, the relative position between the radio wave intensity waveform and the position where the vehicle detector is installed becomes clear, and it is possible to confirm the parallel movement of the relative position.

Further, in the radio wave measuring vehicle of the present invention, a vehicle detector for irradiating light received by the light receiving device is installed at least on a side of a traveling road surface which enters / exits a communication area of a vehicle to be subjected to radio wave measurement. In addition, it is possible to detect the entry / exit of the radio wave measuring vehicle into / from the communication area.

As a result, the relative position between the position where the vehicle detector is installed and the traveling position of the radio wave measuring vehicle is further clarified, such as the parallel movement between the radio wave intensity waveform and the position where the vehicle detector is installed. Can be confirmed more precisely.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a radio wave measurement system mounted on a radio wave measurement vehicle as a first embodiment of the radio wave measurement vehicle of the present invention;

FIG. 2 is a typical configuration diagram of a data communication unit between a roadside device and a vehicle-mounted device in a nonstop toll collection system to which the radio wave measurement system of the present invention is applied, and a roadside device and a vehicle-mounted device in a conventional nonstop fee collection system; Diagram showing a typical configuration of a data communication unit between,

3 is a diagram showing a relationship between a vehicle speed and a radio wave intensity measured and recorded by the radio wave measurement system shown in FIG. 1, and FIG.
Is a diagram showing the relationship between the time when the vehicle speed is slow and the radio wave intensity,
FIG. 3B is a diagram showing the relationship between the time when the vehicle speed is high and the radio wave intensity,

FIG. 4 is a block diagram showing a radio measurement system mounted on a radio measurement vehicle as a second embodiment of the radio measurement vehicle of the present invention;

FIG. 5 is a diagram showing a vehicle speed and a radio field intensity of the radio wave measurement vehicle measured and recorded by the radio wave measurement system shown in FIG.
5A is a diagram showing the relationship between the time when the vehicle speed is low and the radio field intensity, FIG. 5B is a diagram showing the relationship between the time when the vehicle speed is high and the radio field intensity, and FIG. (A), FIG. 5 (b)
The figure showing the result corrected by the moving distance of the radio measurement vehicle on the horizontal axis of

FIG. 6 is a block diagram showing a radio measurement system mounted on a radio measurement vehicle as a third embodiment of the radio measurement vehicle of the present invention;

FIG. 7 is a diagram showing an example of the arrangement of light receivers attached to the side surface of the radio wave measuring vehicle according to the embodiment;

8 is a diagram illustrating an example of a radio wave measurement result measured by the radio wave measurement system illustrated in FIG. 6, and FIG. 8A illustrates a time plotted with a detection time by a light receiver when the vehicle speed is low and a radio wave intensity. FIG. 9A is a diagram showing the time plotted with the detection time by the light receiver when the vehicle speed is high and the radio wave intensity,

9 is a typical configuration diagram of a data communication unit between a roadside device and an on-vehicle device in a non-stop fee system in which a vehicle detector is added to the configuration diagram shown in FIG. 2,

FIG. 10 is a block diagram showing a radio measurement system mounted on a radio measurement vehicle as a fourth embodiment of the radio measurement vehicle of the present invention;

11A and 11B are diagrams showing examples of radio wave measurement results measured by the radio wave measurement system shown in FIG. 10, in which FIG. 11A shows a relationship between time when the vehicle speed is low and radio wave intensity, and FIG. )
Is a diagram showing the relationship between the time when the vehicle speed is fast and the radio wave intensity,
FIG. 11C is a diagram showing the time and the radio wave intensity, in which the horizontal axis of FIGS. 11A and 11B is corrected by the moving distance of the radio wave measuring vehicle, and the detection time by the light receiver is plotted. .

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vehicle detector 2 roadside antenna 3 onboard unit 4 roadside control device 5 communication area 6 radio wave 7 vehicle detector 8 vehicle 9 radio wave measurement vehicle 10 onboard antenna 11 radio wave measurement circuit 12 control circuit 13 recording device 14 output device 15 drive unit 16 moving Measuring circuit 17 Receiver 20 Road surface

Claims (4)

[Claims] 1. A non-stop toll collection system for irradiating a vehicle traveling on a toll road with a radio wave to detect the vehicle and outputting at least the intensity, frequency, and the intensity of the radio wave output from a roadside antenna. In a radio wave measuring vehicle for measuring a communication area for detecting a radio wave, an in-vehicle antenna for receiving the radio wave and a signal received from the in-vehicle antenna are input, and the communication is performed based on the intensity, frequency, and presence or absence of the radio wave. A radio wave measurement system including a radio wave measurement circuit that measures an area, a recording device that records an output signal from the radio wave measurement circuit, and an output device that outputs an output signal from the radio wave measurement circuit to a host device is provided. A radio measurement vehicle characterized by the following. 2. A movement measurement circuit for inputting a detection value detected by a sensor installed in a drive unit of the radio wave measurement vehicle and outputting a detection signal indicating a movement amount of the radio wave measurement vehicle to the control circuit. The radio wave measuring vehicle according to claim 1, further comprising: 3. A vehicle detector installed on an outer peripheral surface of the radio wave measuring vehicle and installed on a side of a traveling road surface on which a vehicle for performing radio wave measurement travels, and receiving light emitted from the vehicle detector. The radio wave measuring vehicle according to claim 1 or 2, further comprising: a light receiving device that outputs a detection signal that detects a traveling position of the radio wave measuring vehicle to the control circuit. 4. The vehicle detector for irradiating light received by the light receiving device is installed on a side of a traveling road surface that enters and exits the communication area of a vehicle performing radio wave measurement, and 4. A vehicle according to claim 3, wherein a plurality of said vehicle detectors for detecting entry and exit from the communication area are provided.
Radio measurement car.