JPH09243440A - Imaging position detection device for large vehicle and imaging device for vehicle with axial load violation using the same - Google Patents

Abstract

(57) Abstract: Even in a large-sized special vehicle having a protrusion above the forehead, it is detected that a position suitable for photographing the vehicle has reached a predetermined photographing position. A sensor (11) emits a beam (11d) that crosses a passage at a high position where a large vehicle blocks and a small vehicle does not block, and outputs a sensing signal SA when the beam (11d) is blocked. The sensor 12 emits a beam 12d that crosses the passage at a position lower than the high position and lower than the protrusion above the front of the head of a large special vehicle,
The sensor signal SB is output when the beam 12d is blocked. The signal processing unit 13 outputs the photographing position detection signal b when the sensing signal SA starts outputting first, and then outputs the sensing signal SB, and when the sensing signal SB starts outputting first, The shooting position detection signal b is output when the output of the detection signal SA is started during the output of the detection signal SB.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a photographing position of a large vehicle that detects when a large vehicle passing through a predetermined passage such as an entrance of a highway has reached a predetermined photographing position, and uses the same. The present invention relates to an imaging device for an axle weight violation vehicle for monitoring an axle weight violation vehicle.

[0002]

2. Description of the Related Art Conventionally, on an expressway, for example, for the purpose of maintenance of road structures, smoothing of traffic, prevention of danger, etc., the axle load of a vehicle passing through a toll gate is measured, and an axle load violation vehicle is measured. , The front of the vehicle is photographed, and warning and guidance are given based on the photographed material.

As an image taking apparatus for taking an image of such an axle load violation vehicle, for example, the axle loads disclosed in Japanese Utility Model Publication No. 2-15199, Japanese Patent Publication No. 411818 and Japanese Patent Publication No. 411817. An imaging device for a violating vehicle is known.

Here, as a first conventional example, the actual fairness 2-
An image pickup apparatus for an axle weight violation vehicle as disclosed in Japanese Patent No. 15199 will be described with reference to FIGS. 12 and 13. FIG. 12 is a diagram showing this photographing device.
FIG. 12A is a plan view thereof, and FIGS. 12B to 12D are side views showing the positional relationship of the vehicle in the photographing device. Further, FIG. 13 is a diagram showing a vehicle detector, and FIG.
12A is a view taken along the line AA in FIG. 12A, and FIG.
It is a BB arrow line view in 2 (a).

This conventional photographing device is equipped with a loading plate 4, a vehicle detector 5A and a camera 6, and is installed at the entrance of a toll gate on an expressway. That is, in FIG. 12, 1 is an island, 2 is a booth, 3 is a lane through which a vehicle passes, and a predetermined position of the lane 3 at the entrance of the island 1 has an axle load when the vehicle 100 passing through the lane 3 passes a tire. A loading plate 4 is arranged as an axial load detector for measuring the.
A vehicle detector 5A is provided near the booth 2 of the island 1, which is the vehicle traveling direction side (right side in FIG. 12) with respect to the loading plate 4. In view of the fact that most of the axle load violation vehicles are large vehicles rather than small vehicles, the vehicle detector 5A is located at a high position where large vehicles block and small vehicles do not block, as shown in FIG. (2m position in the example)
At, the detection beam 5a is emitted across the lane 3 so as to maintain the same height, and a sensing signal is output when the detection beam 5a is blocked. Therefore,
The vehicle detector 5A detects a large vehicle which is a vehicle having a vehicle height equal to or higher than a predetermined height. In addition, the other one in FIG.
The two vehicle detectors 5B are not provided in this conventional example, but are used in the second conventional example described later, and will be described in the description of the conventional example. Vehicle detector 5
On the island 1 at the position on the vehicle traveling direction side with respect to A, a camera 6 as an imaging device has a front surface of the vehicle 100 near the imaging position, that is, the position of the detection beam 5a of the vehicle detector 5A (imaging position). Are arranged in the direction of shooting.

Then, in this conventional photographing apparatus, FIG.
As shown in (b), the vehicle 100 detected by the loading plate 4
When the axial load of the vehicle exceeds a preset axial load, the camera is put in a standby state for photographing, and when the vehicle detector 5A starts outputting a detection signal in the standby state for photographing, the camera 6 is operated to activate the vehicle detector 5A. The front surface of the vehicle 100 that has reached the position (imaging position) of the detection beam 5a is photographed. It should be noted that when the photographing is completed, the photographing standby state is released.

The camera 6 is located at a position (imaging position) where the detection beam 5a of the vehicle detector 5A is blocked from the front surface of the vehicle in violation of the axial load.
It is set for optimal shooting with. Therefore, if the vehicle has an axle load violation such as a large-sized truck having a normal shape, the conventional image capturing apparatus is effective for the shape of the front face of the axle violation vehicle, the driver, and the image of the license plate of the vehicle. You will be able to get a good shooting result.

Here, the vehicle detector 5A detects the detection beam 5a.
Is held at a predetermined height even when a small vehicle such as a passenger vehicle is inserted between the axle load violation vehicle 100 and the vehicle detector 5A as shown in FIG. 12 (c). ,
This is because the front surface of the vehicle 100 that violates the axle load is appropriately photographed without causing erroneous detection.

That is, if the vehicle height of another vehicle (passenger car, etc.) that has entered is less than the height of the detection beam 5a of the vehicle detector 5A and is not erroneously detected by the vehicle detector 5A,
It is possible to avoid erroneous photography of this other vehicle. Then, only the succeeding axle load violation vehicle 100 is properly detected, and the axle load violation vehicle 100 can be appropriately captured.

Usually, most of vehicles that violate the axle load have a vehicle detector 5.
This vehicle detector 5 has a vehicle height higher than the detection beam 5a of A.
The picture is taken properly at the sensing timing of A.

As can be seen from the above description, in the first conventional example, the vehicle detector 5A is simply used as a photographing position detecting device for a large vehicle.

Next, as a second conventional example, Japanese Patent Publication No. 4-1
An imaging device for an axle weight violation vehicle as disclosed in Japanese Patent No. 1818 will be described with reference to FIGS. 12 and 13.

This conventional photographing apparatus is shown in FIGS.
As shown in (b), another sensor 5B is added between the loading plate 4 and the vehicle sensor 5A in the above-described first conventional example imaging device for an axle load violation vehicle. .

As shown in FIG. 12A, the vehicle detector 5
The distance between B and the loading plate 4 in the traveling direction of the vehicle is set such that the preceding vehicle does not exist at the position of the vehicle detector 5B when the violating shaft of the vehicle that violates the axle load rides on the loading plate 4. The distance between the sensor 5B and the vehicle sensor 5A is less than the minimum size of a large vehicle. The vehicle detector 5B is shown in FIG.
As shown in (b), the detection beam 5a of the vehicle detector 5A
Predetermined height at lower position (1.6m in this example)
A detection beam 5b that crosses the lane 3 diagonally downward from the position to the side surface of the island 1 is emitted, and a detection signal is output when the detection beam 5b is blocked. Therefore, the vehicle detector 5B will detect the presence of the vehicle regardless of the shape of the vehicle.

In the above-described first conventional example, when the vehicle that violates the axial load is a long vehicle having a long vehicle length, the time when the violating axis of the long vehicle rides on the loading plate 4 and enters the photographing standby state. Then, the front surface of the vehicle in violation of the axle load exceeds the position of the vehicle detector 5A, and a detection signal is output from the vehicle detector 5B by the vehicle in violation of the axle load. Therefore, in the above-described first conventional example, since the camera 6 is activated by starting the output of the detection signal of the vehicle detector 5A, the front surface of the large vehicle following the axle load violation vehicle is detected by the vehicle detector 5A. When it reaches 5a, the image is taken, and an incorrect image is taken. Therefore, in the second conventional example, the vehicle detector 5B is added to the vehicle detector 5A,
By discriminating the state based on the sensing signal from 5B, the vehicle is normally in the photographing standby state as the photographing standby state at the photographing position (the position where the detection beam 5a of the vehicle detector 5A is cut off) in the normal case. While the photographing is performed when the output of the sensing signal of the sensor 5A is started, in the case as described above, the photographing is performed as a compulsory process at a predetermined timing instead of the photographing position. As the forced processing, it is possible to cancel all the shooting standby states without shooting.

Also in the second conventional example, the vehicle detector 5A is merely used as the photographing position detecting device for a large vehicle.

Next, as a third conventional example, Japanese Patent Publication No. 4-1
An image pickup apparatus for an axle weight violation vehicle as disclosed in Japanese Patent No. 1817 will be described with reference to FIG. FIG.
It is a top view which shows the imaging device of this axle load violation vehicle.

As shown in FIG. 14, this conventional image pickup apparatus is different from the above-mentioned second conventional example in that another vehicle detector 5C is added between the loading plate 4 and the vehicle detector 5B. It is a thing. Similar to the vehicle detector 5B, the vehicle detector 5C emits a detection beam 5c that crosses obliquely downward from a position of a predetermined height at a position lower than the detection beam 5a of the vehicle detector 5A, and the detection beam 5c is blocked. Outputs a sensing signal when In the example shown in FIG. 14, the distance between the loading plate 4 and the vehicle detector 5C in the vehicle traveling direction is 2 m, the distance between the vehicle detector 5C and the vehicle detector 5B is 6 m, and the vehicle detector 5B and the vehicle. The distance from the sensor 5A in the traveling direction of the vehicle is 6 m. The minimum size of a large vehicle is 6850 mm.

In the third conventional example, the vehicle detector 5A,
By determining the state based on the sensed signals from 5B and 5C, a non-violating vehicle following a long axle-violating long vehicle will not be photographed as a violating vehicle in the data of the preceding violating vehicle, and a large vehicle When two vehicles with the minimum length have entered in succession, the following violating vehicle can be accurately captured.

Also in this third conventional example, the photographing is usually performed when the output of the detection signal of the vehicle detector 5A is started, and the vehicle detector 5A is simply used as the photographing position detecting device for a large vehicle. It is only used.

[0021]

However, in each of the above-mentioned conventional examples, the vehicle detector 5A is simply used as the photographing position detection device for a large vehicle, and the output of the detection signal of the vehicle detector 5A is started. Since the shooting is performed when the truck, crane, rafta,
For large special vehicles such as cranes, projections above the front of the vehicle, such as the boom 101, are detected by the vehicle detector 5A, and shooting is performed before the license plate and the driver reach the optimum shooting position. Will end up. That is, FIG.
As shown in FIG. 2 (d), when the heavy-duty special vehicle 100 violates the axle load, the pulley 102, the wire rope 103, etc. at the tip of the boom 101 of the heavy-duty special vehicle 100 is detected by the vehicle detector 5A. Therefore, shooting is performed at this detection timing. When shooting at this timing, the shooting timing is early and the shooting distance is long. Therefore, the driver's seat and license plate are small, making it difficult to identify the driver's face and license plate.
In addition, since the shooting is normally performed in synchronization with the flash light both day and night, there is a problem that the film or the like is underexposed.

Therefore, in the conventional image pickup apparatus for an axle load violation vehicle, the forehead of a normal large truck or the like can be detected relatively easily, and the forehead can be photographed optimally at a fixed position.・ For large special vehicles such as cranes, rafts and cranes, it is difficult to properly photograph the forehead due to the protrusion above the forehead, and license plate
It was a situation where it was not possible to obtain effective photo-taking results for the driver image. At present, about 40% of axle weight violation vehicles are occupied by large special vehicles, so it may not be possible to obtain effective photography results for license plates and driver images of axle weight violation vehicles. There were many.

The present invention has been made in view of the above circumstances, and is applicable not only when the large vehicle is an ordinary large vehicle such as a large truck but also when it is a large special vehicle such as a truck, a crane or a rough terrain crane. Even if there is, it is possible to detect that the location suitable for shooting of the large vehicle has reached the predetermined shooting position, regardless of the vehicle type, and it is possible to detect the image of the front of the vehicle, the driver, the license plate. An object of the present invention is to provide a photographing position detection device for a large vehicle that enables photographing to obtain an effective photographing result.

The present invention can be applied to various types of vehicles not only when the axle load violation vehicle is a normal large vehicle such as a large truck but also when it is a large special vehicle such as a truck / crane or a rough terrain / crane. It is an object of the present invention to provide an image capturing device for a vehicle that violates an axle load, regardless of the front face of the vehicle, the driver, and the image of the license plate.

[0025]

In order to solve the above-mentioned problems, in a photographing position detecting device for a large vehicle according to a first aspect of the present invention, a large vehicle passing through a predetermined passage reaches a predetermined photographing position. In a photographing position detection device for a large vehicle that detects a signal, emits a first beam that crosses the passage at a high position where a large vehicle blocks and a small vehicle does not block, and when the first beam is blocked. A first sensor which outputs a first sensing signal; and a second beam which crosses the passage at a position lower than the higher position and lower than a protrusion above the front of the head of a large special vehicle, the second beam comprising: A second beam that is close to or spaced apart from the first beam in the vehicle traveling direction is emitted, and the second sensing signal is emitted when the second beam is blocked. A second detector for outputting, based on said first and second sensing signal, wherein the first and second
From the state where both of the sensing signals of
When the output of the second sensing signal is started after the output of the first sensing signal is started when the output of the second sensing signal is started, the photographing position detection signal is output, and Signal processing means for outputting the photographing position detection signal when the output of the first detection signal is started during the output of the second detection signal when the output of the second detection signal is started; It is equipped with.

According to the first aspect, when the large special vehicle travels in the passage, the projection above the front head of the large special vehicle blocks the first beam but does not block the second beam. At a portion lower than the protrusion above the front head (the front end thereof is the front surface of the main body of the large special vehicle), the second beam is blocked, but the first beam is not blocked. Therefore, since the first beam and the second beam are close to each other even if there is no space in the vehicle traveling direction, when the large special vehicle advances in the passage, first, the front of the large special vehicle is moved. After the first beam is blocked by the projection above the head, the second beam is blocked by the front surface of the main body of the large-sized special vehicle, and the second sensing signal is output after the output of the first sensing signal is started. Will be started. Therefore, the first
In this aspect, since the shooting position detection signal is output when the output of the second detection signal is started after the output of the first detection signal is started, the shooting position detection signal causes the front head of the large special vehicle to be output. It is possible to know that the front surface of the body of the large-sized special vehicle (that is, the portion near the driver, the license plate, etc.) has reached the predetermined photographing position, not the projection above.

On the other hand, when a normal large-sized vehicle having no protrusion above the forehead progresses in a passage, the first large-sized vehicle takes the first order in the order determined by the uneven shape of the front surface of the large-sized vehicle and the positional relationship between the first and second beams. And the second beam is blocked. According to the first aspect, the output of the first sensing signal is started when the output of the second sensing signal is started after the output of the first sensing signal is started and during the output of the second sensing signal. When the vehicle is driven, the photographing position detection signal is output. Therefore, the photographing position detection signal indicates that the front surface of a normal large vehicle (that is, a portion near a driver or a license plate) has reached a predetermined photographing position. You can know.

Since the small vehicle does not block the first beam, the shooting position can be detected unless there is a special situation in which the projection above the front head of the large special vehicle overlaps in the vehicle traveling direction. It has no effect.

As described above, according to the first aspect, it is possible to detect that the location suitable for photographing a large vehicle has reached a predetermined photographing position regardless of the vehicle type.
Therefore, by using the photographing position detecting device according to the first aspect, it is possible to perform photographing for obtaining an effective photographing result for the images of the front surface of the vehicle, the driver, and the license plate.

According to a second aspect of the present invention, there is provided a large vehicle photographing position detecting device for detecting that a large vehicle passing through a predetermined passage has reached a predetermined photographing position. A first crossing the passage at a high position where a vehicle blocks and a small vehicle does not block
And a first sensor that emits the first beam and outputs a first detection signal when the first beam is blocked, and a protrusion above the front of the large special vehicle that is lower than the high position. A second beam that traverses the passage at a lower position, and is located closer to the first beam at a distance in the vehicle traveling direction and closer to the first beam in the vehicle traveling direction. A second sensor that emits a second beam that emits light and outputs a second sensing signal when the second beam is blocked; and the second sensor based on the first and second sensing signals. When the output of the first sensing signal is started from the state where both the first and second sensing signals are not output, the output of the second sensing signal is changed after the output of the first sensing signal is started. Output shooting position detection signal when started And No. processing means, those provided with.

In this second aspect, the second beam is the first
Since it is located close to the beam in the vehicle traveling direction with a space in the vehicle traveling direction, and is located on the vehicle traveling direction side with respect to the first beam, a normal large vehicle having no protrusion above the forehead Even when traveling through the passage, the second beam is blocked after the first beam is blocked, so the output of the second sensing signal is started after the output of the first sensing signal is started. The shooting position detection signal is output only occasionally, but the second mode is substantially the same as the first mode.

According to a third aspect of the present invention, there is provided a large vehicle photographing position detecting device for detecting a large vehicle passing through a predetermined passage reaching a predetermined photographing position. A first crossing the passage at a high position where a vehicle blocks and a small vehicle does not block
And a first sensor that emits the first beam and outputs a first detection signal when the first beam is blocked, and a protrusion above the front of the large special vehicle that is lower than the high position. A second beam that traverses the passage at a lower position, and is located closer to the first beam at a distance in the vehicle traveling direction and closer to the first beam in the vehicle traveling direction. A second sensor that emits a second beam that emits light and outputs a second sensing signal when the second beam is blocked; and the second sensor based on the first and second sensing signals. When the output of the first sensing signal is started from the state where both the first and second sensing signals are not output, the output of the second sensing signal is changed after the output of the first sensing signal is started. Output shooting position detection signal when started In both cases, when the output of the second sensing signal is started from the state and the output of the first sensing signal is started during the output of the second sensing signal, the second sensing is performed. Signal processing means for outputting the photographing position detection signal when the output of the signal is once ended and then restarted.

The positional relationship between the first and second beams in the third mode is the same as in the case of the second mode. In the first and second aspects, in a special situation where a protrusion above the front of the large special vehicle overlaps with a small vehicle preceding the large special vehicle in the vehicle traveling direction, the large special vehicle is The shooting position of the vehicle cannot be properly detected. On the other hand, in the third aspect, when the output of the first sensing signal is started first (not in the special situation,
This corresponds to the case where the projection above the front of the front of the large special vehicle does not overlap with the preceding small vehicle), and is taken when the output of the second sensing signal is started after the output of the first sensing signal is started. When the position detection signal is output and the output of the second sensing signal is started from the state,
When the output of the first sensing signal is started during the output of the second sensing signal (corresponding to the special situation), the output of the second sensing signal is once ended and then restarted. Since the photographing position detection signal is output when the photographing position is detected, the photographing position can be properly detected even in the special case.

According to a fourth aspect of the present invention, there is provided an apparatus for detecting a photographing position of a large vehicle according to the second or third aspect, wherein the second sensor is the first sensor. It is arranged on the side in the vehicle traveling direction at a predetermined distance from the container in the vehicle traveling direction. This fourth
The above aspect is a specific example of realizing the positional relationship between the first beam and the second beam in the second and third aspects.

A photographing position detecting device for a large vehicle according to a fifth aspect of the present invention is the photographing position detecting device for a large vehicle according to the second or third aspect, wherein the first and second sensors are substantially the same. Of the first beam and the second beam so that the direction of the second beam imaged on the horizontal plane is tilted toward the vehicle direction with respect to the direction of the first beam imaged on the horizontal plane. The sensor of is arranged. The fifth mode is also a specific example of realizing the positional relationship between the first beam and the second beam in the second and third modes.

According to a sixth aspect of the present invention, there is provided a device for detecting a photographing position of a large vehicle according to the second or third aspect, wherein the second sensor is the first sensor. The first beam is arranged on the side in the vehicle traveling direction at a predetermined interval in the vehicle traveling direction with respect to the container, and the direction of the second beam imaged on the horizontal plane is imaged on the horizontal plane.
So that it leans toward the vehicle traveling direction with respect to the beam direction of
The first and second sensors are arranged. This sixth aspect is also the first aspect in the second and third aspects.
It is a specific example of the realization of the positional relationship between the beam and the second beam.

According to a seventh aspect of the present invention, there is provided an apparatus for detecting a photographing position of a large vehicle according to the fifth or sixth aspect, wherein the direction of the first beam imaged on a horizontal plane is In the horizontal plane, it is inclined toward the direction opposite to the vehicle traveling direction with respect to the direction orthogonal to the vehicle traveling direction. In this case, of the left and right sides of the vehicle, the side opposite to the first sensor, which is the starting point of the first beam (that is, the far side), blocks the first beam first. , Even if the angular difference between the directions of the first and second beams mapped onto the horizontal plane is relatively small,
It is possible to set a relatively large distance between the vehicle cut-off position of the second beam and the vehicle cut-off position of the second beam,
preferable.

An image pickup position detecting apparatus for a large vehicle according to an eighth aspect of the present invention is the image pickup position detecting apparatus for a large vehicle according to any one of the first to seventh aspects, wherein the first beam has substantially the same height. The second beam crosses the passage diagonally downward from a predetermined height so as to maintain the height. The eighth aspect is a specific example of the arrangement of the first beam in the height direction and the arrangement of the second beam in the height direction.

According to a ninth aspect of the present invention, there is provided a photographing position detecting apparatus for a large vehicle according to any one of the first to eighth aspects, wherein the signal processing means has the first feature. When the output of the second sensing signal and the output of the second sensing signal are both finished, the output of the photographing position detection signal is finished.

According to the ninth aspect, the photographing position detection signal starts to be output on the front surface of the main body of the large special vehicle excluding the projection portion above the front head and is output on the rear surface of the large special vehicle. In addition, the output is started on the front surface of the normal large vehicle, and the output is ended on the rear surface of the large vehicle. Therefore, the photographing position detection signal is a vehicle detection signal in which only the main body of the large special vehicle excluding the protrusion above the front head is detected and the normal large vehicle is detected as it is. Therefore, for example, in the above-mentioned second conventional example and third conventional example, the vehicle detector 5A in FIG. 12 and the vehicle detector 5A in FIG. 14 are replaced with the photographing position detection device according to the eighth aspect. Therefore, in the case of the large special vehicle that occurs in the second conventional example and the third conventional example, an effective photographing result can be obtained for the images of the front surface of the vehicle, the driver, and the license plate. While eliminating the inconvenience of not being able to
The advantages of the second conventional example and the third conventional example can be directly obtained.

According to a tenth aspect of the present invention, there is provided an image pickup apparatus for an axle load violation vehicle, which comprises the image pickup position detection apparatus for a large vehicle according to any one of the first to ninth aspects and the first and second detectors. On the other hand, it is provided on the side opposite to the vehicle traveling direction,
An axle load detector for detecting the axle load of a vehicle passing through the passage, and an axle load violation detection based on an output from the axle load detector when the detected axle load exceeds a preset axle load. A shaft load measuring device that outputs a signal; a photographing device that is provided on the vehicle traveling direction side with respect to the first and second sensors and that photographs the vicinity of the photographing position; Control means for controlling the photographing device so that the photographing device performs a photographing operation when the photographing position detection device starts outputting the photographing position detection signal under a predetermined condition based on the photographing position detection signal. And ,.

Unlike the conventional image pickup apparatus for an axle load violation vehicle, the image pickup apparatus for an axle load violation vehicle according to the tenth aspect does not use a mere vehicle detector as an image pickup position detection device for a large vehicle, but it is the same as described above. Since the image pickup position detection device for a large vehicle according to any one of the first to ninth aspects is used, not only when the vehicle that violates the axle load is a normal large vehicle such as a large truck, but also a truck, a crane, a rafter, etc.
Even in the case of a large special vehicle such as a crane, it is possible to obtain an effective photographing result for the images of the front surface of the vehicle, the driver, and the license plate regardless of the vehicle type.

The image pickup position detection device for a large vehicle according to the present invention can be used not only in an image pickup device for an axle load violation vehicle but also in various image pickup devices for photographing a large vehicle.

[0044]

BEST MODE FOR CARRYING OUT THE INVENTION An image pickup position detecting apparatus for a large vehicle and an image pickup apparatus for an axle load violation vehicle using the same according to the present invention will be described below with reference to the drawings.

First, an image pickup position detecting device for a large vehicle and an image pickup device for an axle load violation vehicle using the same according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

FIG. 1 is a block diagram showing the schematic arrangement of an image pickup apparatus for an axle load violation vehicle according to this embodiment. FIG. 2 is a diagram showing a state in which the image capturing device for an axle weight violation vehicle according to the present embodiment is installed in a toll gate entrance of a highway.
2A is a plan view thereof, and FIG. 2B is C- in FIG. 2A.
FIG. FIG. 3 is a flow chart showing the operation of each part of the photographing device for an axle weight violation vehicle according to the present embodiment, FIG. 3 (a) is a flow chart showing the operation of the signal processing part 13, and FIG. 3 (b) is the control part 8. 3 is a flowchart showing the operation of FIG. FIG. 4 is a side view showing the positional relationship of vehicles in various states in the image capturing apparatus for a vehicle with axial load violation according to the present embodiment. FIG. 5 is a time chart showing the operation of the image pickup apparatus for a vehicle having an axial load violation according to the present embodiment, and corresponds to FIG.

The dimensions shown in FIG. 2 are merely examples, and the dimensions are not limited to these. The same applies to the dimensions described in other drawings.

As shown in FIGS. 1 and 2, the photographing device for an axle load violation vehicle according to this embodiment includes a loading plate 4, an axle load measuring device 7, a photographing position detecting device 10A for a large vehicle, and a control. It is equipped with a section 8 and a camera 6, and is installed at the entrance to the toll gate of an expressway. In addition, the photographing position detection device 10A
Includes vehicle detectors 11 and 12 and a signal processing unit 13.

In FIG. 2, 1 is an island, 2 is a booth, 3 is a lane through which the vehicle 100 passes, and at a predetermined position of the lane 3 at the entrance of the island 1, when a tire of the vehicle 100 passing through the lane 3 passes. A loading plate 4 is arranged as an axial load detector that measures the axial load. The axial load measuring device 7 shown in FIG. 1 is configured to output an axial load violation detection signal a based on the output from the loading plate 4 when the detected axial load exceeds a preset axial load. ing.

The vehicle detectors 11 and 12 are, as shown in FIG. 2, the vehicle traveling direction side with respect to the loading plate 4 (right side in FIG. 2).
It is provided in the same vehicle traveling direction position near the booth 2 of the island 1. The vehicle detector 11 is shown in FIG.
As shown in (b), a high position where large vehicles block and small vehicles do not block (2.3 m position in this example)
The detection beam 11d which crosses the lane 3 so as to maintain the same height at
When it is cut off, the sensing signal SA is output. Therefore, the vehicle detector 11 detects a large vehicle which is a vehicle having a vehicle height higher than a predetermined height. On the other hand, as shown in FIG. 2B, the vehicle detector 12 has a predetermined height at a position lower than the position of the detection beam 11d of the vehicle detector 11 and lower than the protrusion above the front head of the large special vehicle. The detection beam 12d that crosses the lane 3 diagonally downward from the position (1.7 m in this example) to the side surface of the island 1 is emitted, and the detection signal SB is output when the detection beam 12d is blocked. Therefore, the vehicle detector 11 detects the presence of the vehicle regardless of the shape of the vehicle. Then, in the present embodiment, the detection beam 12
d is not spaced from the detection beam 11d in the vehicle traveling direction.

In this embodiment, as shown in FIGS. 1 and 2, the vehicle detector 11 includes a light emitting device 11a and a light receiving device 11.
b, the detection beam 11 emitted from the light emitter 11a
The infrared beam as d is reflected by the reflector 11c and received by the light receiver 11b. Similarly, the vehicle detector 12 includes a light emitter 12a and a light receiver 12b,
The infrared beam as the detection beam 12d emitted from the light emitter 12a is reflected by the reflector 12c and is received by the light receiver 12b.
It is designed to be received by. However, vehicle detector 1
1 and 12 may be so-called transmission type,
It may be an ultrasonic type.

Incidentally, another vehicle detector 5B shown in FIG.
Is not provided in this embodiment and is used in other embodiments described later, and will be described in the description of the embodiment.

As shown in FIG. 2, vehicle detectors 11, 12 are shown.
On the island 1 on the vehicle traveling direction side with respect to
A camera 6 as an image capturing device is provided near the image capturing position, that is, the detection beams 11d and 12d of the vehicle detectors 11 and 12.
The front surface of the vehicle 100 that has reached the position (shooting position) is arranged in the direction of shooting. The camera 6 is set so as to be able to optimally capture the front surface of the axle load violation vehicle 100 at a position (imaging position) where the detection beams 11d and 12d of the vehicle detectors 11 and 12 are blocked. As the camera 6, a film type camera or a so-called still camera may be used. Although not shown in the drawing, a light emission source such as a strobe that emits light in synchronization with the camera 6 is also provided as a part of the photographing device.

The signal processing section 13 in FIG.
When the output of the detection signal SA is started based on the detection signal SA from 1 and the detection signal SB from the vehicle detector 12 when both the detection signals SA and SB are not output, When the output of the sensing signal SB is started after the output is started, the shooting position detection signal b is output, and when the output of the sensing signal SB is started from the above state, the sensing signal SA is output during the output of the sensing signal SB. To output the shooting position detection signal b when the output is started,
It is configured. Specifically, the signal processing unit 13 can be configured using a logic circuit, a CPU, or the like.

Here, a specific example of the operation of the signal processing unit 13 will be described with reference to the flowchart shown in FIG. In the following description, the sensing signals SA, S
B shows the output state in the sensing state when it is "H", and "L"
In this case, the non-sensing state indicates the non-output state.

The signal processing unit 13 operates in the state where the sensing signal SA is L and the sensing signal SB is L (that is, the detection beam 11).
The operation is started in a state where d and 12d are not cut off.

When the signal processing unit 13 starts its operation, it first determines whether or not the sensing signal SA is H (detection beam 11d).
Is blocked or not) (step S
1). Since the sensing signal SA was L in the initial state, it is determined in step S1 whether the sensing signal SA has risen.
That is, it is determined whether or not the output of the sensing signal SA has started.

When it is determined in step S1 that the sensing signal SA is H, the signal processing unit 13 holds the signal SA '(step S2), and the sensing signal SB is held while the signal SA' is held. It is determined whether or not it is H (whether or not the detection beam 12d is blocked) (step S3). Since the sensing signal SB is L in the initial state, step S3
Then, whether the sensing signal SB has risen, that is,
It will be determined whether or not the output of the sensing signal SB has started. Then, if it is determined that the sensing signal SB is not H in step S3, the sensing signal S is repeated by repeating step S3.
Wait until B becomes H. When it is determined in step S3 that the sensing signal SB is H, the process proceeds to step S4.

On the other hand, when it is determined in step S1 that the sensing signal SA is not H, the signal processing unit 13 determines that the sensing signal SB
Is determined to be H (step S5). If it is determined in step S5 that the sensing signal SB is not H, the process returns to step S1. On the other hand, in step S5, the detection signal SB is H
If it is determined that the detection signal S
It is determined whether A is H (step S6). If it is determined in step S6 that the sensing signal SA is not H, the process returns to step S5. On the other hand, in step S6, the sensing signal SA
If it is determined that H is H, the signal SA ′ is held (step S7) and the process proceeds to step S4.

In step S4, the signal processor 13
Turns on the photographing position detection signal b (that is,
The output of the photographing position detection signal b is started). After that, the signal processing unit 13 waits until the sensing signal SA is L and the sensing signal SB is L (that is, the detection beams 11d and 12d are not blocked) (step S8).
When that happens, the shooting position detection signal b is turned off (that is, the output of the shooting position detection signal b is terminated).
(Step S9), the holding of the signal SA 'is released (step S10), and the process returns to step S1.

Further, the control unit 8 in FIG. 1 is based on the axial load violation detection signal a from the axial load measuring device 7 and the photographing position detection signal b from the signal processing unit 13 under a predetermined condition. When the output of the photographing position detection signal b from 13 is started, the photographing signal c is given to the camera 6 to cause the camera 6 to perform the photographing operation. The control unit 8 and the signal processing unit 13 are
For example, the same CPU may be used.

In the present embodiment, specifically, the control unit 8
When the image pickup position detection signal b is received, the image pickup standby state is set, and when the signal processing unit 13 starts outputting the image pickup position detection signal b in the image pickup standby state, the image pickup signal c is given to the camera 6.

A concrete operation example of the control unit 8 is shown in FIG.
This will be described with reference to FIG. When the control unit 8 starts the operation, first, it waits until it receives the axial load violation detection signal a (step S21), and when it receives the axial load violation detection signal a, waits until it receives the photographing position detection signal b (step S22). When receiving the photographing position detection signal b, the photographing signal c is given to the camera 6 to perform the photographing operation (step S23), and step S
Return to 21.

Next, an example of the operation of the photographing apparatus for an axle load violation vehicle according to the present embodiment according to the actual positional relationship of the vehicle will be described with reference to FIGS. 3 to 5.

State 1 (large special vehicle 1 shown in FIG. 4A)
When the violating axis of 00 is placed on the loading plate 4), the axis load violation detection signal a is output, and the state of passing through step 21 in FIG. 3B and repeating the determination of step S22, that is, imaging It will be in a standby state. In this state 1, since the sensing signals SA and SB are L, steps S1 and S5 in FIG. 3A are repeated.

Next, in state 2 shown in FIG. 4 (b), the pulley portion 102 at the tip of the boom 101, which is a protrusion above the front head of the large special vehicle 100, reaches the high detection beam 11d and interrupts it. State), the sensing signal SA becomes H, the signal SA ′ is held in step S2 through step S1 in FIG. 3A, and the determination in step S3 is repeated.

Next, in state 3 shown in FIG. 4C (the boom 101 and the like of the large special vehicle 100 does not block the high detection beam 11d, the front surface of the main body of the large special vehicle 100 does not detect the low detection beam 12d. When it is in the cut-off state), the sensing signal SB becomes H, and steps S1 and S in FIG.
After 2 and S3, the photographing position detection signal b becomes O in step S4.
The state becomes N, and the state in which the determination in step S8 is repeated is entered.
Then, in this state 3, since the photographing position detection signal b is turned on, the photographing signal c is output in step S23 through step S22 in FIG. 3B, and the camera 6 outputs the image of the main body of the large special vehicle 100. The front area is photographed. When the shooting is completed, the process returns to step S21 in FIG.

Then, when the state 4 shown in FIG. 4 (d) (the state where the large special vehicle 100 passes the detection beams 11d and 12 and the detection beams 11d and 12d are not blocked), the sensing signals SA and SB are transmitted. 3A, the photographing position detection signal b is turned off in step S9 in FIG. 3A, the holding of the signal SA ′ is released in step S10, and the step S10 is performed.
Return to 1.

On the other hand, when a normal large vehicle such as a large truck that does not have a projection above the forehead passes through the lane 3, the detection beam 11d is determined in the order determined according to the uneven shape of the front surface of the large vehicle. , 12d are cut off. If the detection beam 11d is first blocked by the front surface of the large vehicle, the operation is exactly the same as in the case of the large special vehicle described above, and if the detection beam 12d is first blocked by the front surface of the large vehicle as shown in FIG. ) In steps S1, S5, S6, S7, S
4, the operation is performed through S8, S9, and S10, and when the front surface of the large vehicle reaches the positions of the detection beams 11d and 12d, the photographing operation is performed.

As described above, according to the present embodiment, regardless of the type of vehicle, the position suitable for photographing a large vehicle has reached a predetermined photographing position (positions of the detection beams 11d and 12d in the vehicle traveling direction). It is possible to take a picture at a position where an effective photographing result is obtained for the front surface of the vehicle, the license plate and the image of the driver.

In the first embodiment described above, as described above, no space is provided between the detection beam 11d and the detection beam 12d in the vehicle traveling direction. However, in the first embodiment, the detection beam 11
d and the detection beam 12d are brought close to each other, and the detection beam 11d
A space may be provided between the detection beam 12d and the detection beam 12d in the vehicle traveling direction. In this case, either of the detection beams 11d and 12d may be on the side in the vehicle traveling direction.

Here, the detection beam 12d and the detection beam 11d are brought close to each other in the vehicle traveling direction, and
6 to FIG. 8, three examples will be described in which the detection beam 12d is arranged on the side in the vehicle traveling direction with respect to the detection beam 11d with a space between the detection beam 11d and the detection beam 11d. . In addition, in FIG. 6 to FIG.
Elements that are the same as or correspond to the elements in FIG. 2 are assigned the same reference numerals, and descriptions thereof will be omitted.

FIG. 6 is a view showing another arrangement example of the vehicle detectors 11 and 12 of the photographing position detecting device 10A, and FIG.
6A is a plan view corresponding to FIG. 2A, and FIG.
It is a DD arrow line view in (a). In this example, the directions of the detection beams 11d and 12d that are mapped on the horizontal plane (that is, the detection beams 11d and 12d when viewed as shown in FIG.
Direction is kept substantially the same direction, the vehicle detector 11 and the vehicle detector 12 are arranged at a predetermined interval in the vehicle traveling direction, and the vehicle detector 12 is in the vehicle traveling direction with respect to the vehicle detector 11. On the right side (right side in FIG. 6A).

FIG. 7 is a view showing still another arrangement example of the vehicle detectors 11 and 12 of the photographing position detecting apparatus 10A.
2A is a plan view corresponding to FIG. 2A, and FIG. 7B is a view taken along the line EE in FIG. 7A. In this example, the vehicle detectors 11 and 12 are arranged at substantially the same position in the vehicle traveling direction (that is, the vehicle detectors 11 and 12 are arranged so that there is no space in the vehicle traveling direction between them). Then, the vehicle detector 1 is arranged such that the direction of the detection beam 12d imaged on the horizontal plane is inclined toward the vehicle traveling direction side (right side in FIG. 7A) with respect to the direction of the detection beam 11d imaged on the horizontal plane.
1, 12 are arranged. Then, the direction of the first beam imaged on the horizontal plane is tilted toward the side opposite to the vehicle traveling direction with respect to the direction (vertical direction in FIG. 7A) orthogonal to the vehicle traveling direction on the horizontal plane. ing.

FIG. 8 is a view showing still another arrangement example of the vehicle detectors 11 and 12 of the photographing position detecting apparatus 10A.
FIG. 8A is a plan view corresponding to FIG. 2A, and FIG. 8B is a view on arrow FF in FIG. 8A. In this example, the vehicle detector 11 and the vehicle detector 12 are arranged at a predetermined interval in the vehicle traveling direction, and the vehicle detector 12 is located in the vehicle traveling direction with respect to the vehicle detector 11 (see FIG. 6A). It is located on the right side of the inside. At the same time, the detection beam 12d mapped on the horizontal plane
The vehicle detectors 11 and 12 are arranged so that the direction of is inclined toward the vehicle traveling direction side (the right side in FIG. 8A) with respect to the direction of the detection beam 11d mapped on the horizontal plane. And
The direction of the first beam imaged on the horizontal plane is inclined to the side opposite to the vehicle traveling direction with respect to the direction (vertical direction in FIG. 8A) orthogonal to the vehicle traveling direction on the horizontal plane. .

As shown in FIGS. 6, 7 and 8, when the vehicle detectors 11 and 12 are arranged, not only in the case of a large special vehicle but also in a normal large vehicle without a protrusion above the forehead. Even in such a case, the detection beam 11d is always blocked first by the large vehicle, and the detection beam 12d is blocked thereafter.

Therefore, in the first embodiment, the vehicle detectors 11 and 1 as shown in FIGS. 6, 7 and 8 are used.
When changing to adopt the arrangement of 2,
The operation of the signal processing unit 13 shown in (a) may be changed as follows. That is, in FIG. 3 (a), steps S5, S6, and S7 are removed, and in step S1, N
If it is determined to be O, the process may return to step S1 again.

By the way, in the above-described first embodiment, in the photographing position detecting device 10A, the projection above the forehead of the large special vehicle is directed to the small vehicle preceding the large special vehicle in the vehicle traveling direction. In a special situation in which the large special vehicle overlaps, it is not possible to properly detect the shooting position of the large special vehicle. For example, in the state 2 shown in FIG. 4B, the rear portion of the passenger car (not shown) that precedes the vehicle detector 1
In a special situation where the second detection beam 12a is blocked, the shooting position detection signal b starts to be output at that time, and shooting is performed at that time, resulting in erroneous shooting.

Next, particularly with reference to the photographing position detecting apparatus for a large vehicle and the photographing apparatus for an axle load violation vehicle using the photographing position detecting apparatus according to the second embodiment of the present invention, which can eliminate such inconvenience, This will be described with reference to FIGS.
Since the present embodiment is a modification of the first embodiment, the first embodiment will be referred to in the description of the present embodiment.
Descriptions that are the same as those in the above embodiment will be omitted.

FIG. 9 is a flow chart showing the operation of the signal processing unit 13 in the photographing apparatus for an axle weight violation vehicle according to this embodiment. FIG. 10 is a side view showing the positional relationship of vehicles in various states in the image capturing apparatus for a vehicle with axial load violation according to the present embodiment. FIG. 11 is a time chart showing the operation of the image capturing apparatus for the vehicle with axial load violation according to the present embodiment.
It corresponds to FIG.

The present embodiment is a modification of the first embodiment as follows. That is, this embodiment is similar to the first embodiment in that the vehicle detector 1
The arrangement of 1 and 12 is changed to the arrangement shown in any of FIG. 6 to FIG. 8 described above, and the operation of the signal processing unit 13 is changed.

In the present embodiment, the signal processing unit 13 does not output both the sensing signals SA and SB based on the sensing signal SA from the vehicle detector 11 and the sensing signal SB from the vehicle detector 12. When the output of the sensing signal SA is started from the state, the shooting position detection signal b is output when the output of the sensing signal SB is started after the output of the sensing signal SA is started, and the output of the sensing signal SB is output from the state. When the output of the sensing signal SA is started during the output of the sensing signal SB, the shooting position detection signal b is output when the output of the sensing signal SB is once ended and then restarted. Is configured to do so. Specifically, the signal processing unit 13 can be configured using a logic circuit, a CPU, or the like.

Here, a specific example of the operation of the signal processing unit 13 will be described with reference to the flowchart shown in FIG. In the following description, the sensing signal S
A and SB indicate an output state in a sensing state when "H" and a non-output state in a non-sensing state when "L".

The signal processing unit 13 operates in the state where the sensing signal SA is L and the sensing signal SB is L (that is, the detection beam 11).
The operation is started in a state where d and 12d are not cut off.

Upon starting the operation, the signal processing section 13 first determines whether or not the sensing signal SB is H (detection beam 12d).
Is blocked or not) (step S3)
1). Since the sensing signal SA was L in the initial state, it is determined in step S31 whether the sensing signal SB has risen, that is, whether the output of the sensing signal SB has started.

When it is determined in step S31 that the sensing signal SB is not H, the signal processing unit 13 determines that the sensing signal SA is H.
Or not (whether or not the detection beam 11d is blocked) (step S32). Since the sensing signal SA is L in the initial state, it is determined in step S32 whether the sensing signal SA has risen, that is, the sensing signal S.
It will be determined whether or not the output of A has started.

When it is determined in step S32 that the sensing signal SA is H, the signal processing section 13 holds the signal SA '(step S2), and thereafter, whether the sensing signal SB is H (detection). It is determined whether or not the beam 12d is blocked (step S34). Then, step S34
When it is determined that the sensing signal SB is not H in step S, step S
34 is repeated until the sensing signal SB becomes H. If it is determined in step S34 that the sensing signal SB is H, steps S4, S8, S9, S10 in FIG.
Then, through the same steps S35 to S38, respectively, the process returns to step S31.

When it is determined in step S31 that the sensing signal SB is H, the signal processing unit 13 determines that the sensing signal SA is H.
(Whether or not the detection beam 11d is blocked) is determined (step S39). When it is determined in step S39 that the sensing signal SA is H, the signal processing unit 1
3 holds the signal SA ″ (step S40) and determines whether or not the sensing signal SB is L (whether or not the detection beam 12d is cut off) (step S41). Sensing before step S41 Since the signal SB is H, it is determined in step S41 whether the sensing signal SB has risen.
That is, it is determined whether or not the output of the sensing signal SB is completed. Then, in step S41, the sensing signal S
When it is determined that B is not L, step S41 is repeated and the process waits until the sensing signal SB becomes L. Step S41
When it is determined that the sensing signal SB is L, the signal SA ″
Is held and the signal SA ′ is held (step S42), and the step S34 and FIG.
After the same steps S35 to S38 as the middle steps S4, S8, S9, and S10, respectively, the process returns to step S31.

When it is determined in step S32 that the sensing signal SA is not H, the signal processing unit 13 determines that the sensing signal SB is H.
Or not (whether or not the detection beam 12d is blocked) (step S43), and H is determined in step S43.
If it is determined that it is not, the process returns to step S32, while if it is determined to be H in step S43, the process proceeds to step S39.

When it is determined in step S39 that the sensing signal SA is not H, the signal processing unit 13 determines that the sensing signal SB is L.
Or not (whether or not the detection beam 12d is blocked) (step S44). If it is determined to be L in step S44, the process returns to step S32, while it is determined to be not L in step S44. If done, step S39
Move to

Next, an example of the operation of the photographing apparatus for an axle load violation vehicle according to the present embodiment, which corresponds to the actual positional relationship of the vehicle, will be described with reference to FIGS. 9 to 11.

State 1 shown in FIG. 10A (passenger vehicle (small vehicle) 1 in front of the large special vehicle 100 when the violating shaft of the large special vehicle 100 is placed on the loading plate 4)
When the low detection beam 12d is blocked by 00 '), the axial load violation detection signal a is output,
The state of passing through step S21 in (b) and repeating the determination of step S22, that is, the shooting standby state is entered. In this state 1, since the sensing signal SA is L and the sensing signal SB is H, the determinations of steps S39 and S44 in FIG. 9 are repeated.

Next, as shown in FIG. 10B, state 2 (boom 101, which is a protrusion above the front head of large-sized special vehicle 100).
The pulley portion 102 at the tip of the vehicle overlaps the rear portion of the preceding passenger vehicle 100 'in the vehicle traveling direction, and
The pulley portion 102 at the tip of the boom 101 of 0 reaches the high detection beam 11d and blocks it, and the preceding passenger vehicle 100 '
When the lower detection beam 12d is cut off due to, the sensing signal SB remains H and the sensing signal SA becomes H, and the signal SA ″ is held in step S40 through step S39 in FIG. The judgment is repeated.

Next, in state 3 shown in FIG. 10 (c) (the pulley portion 102 at the tip of the boom 101 of the large-sized special vehicle 100, the wire rope 103, etc. does not block the high detection beam 11d, the large-sized special vehicle 100 The front of the body of the vehicle does not reach the low detection beam 12d and the front passenger vehicle 10
0'passes the detection beam 12d and the detection beam 12d
Is not cut off), the sensing signals SA, S
B becomes L, and the holding of the signal SA ″ is released in step S42 through step S41 in FIG.
The state in which A ′ is held and the determination in step S34 is repeated is entered.

Next, in state 4 (large special vehicle 100 shown in FIG. 10D), the pulley portion 102 at the tip of the boom 101 of the large special vehicle 100 and the wire rope 103 do not block the high detection beam 11d. When the front surface of the main body reaches the low detection beam 12d and shuts it off), the sensing signal SB becomes H, the photographing position detection signal b is turned ON in step S35 through step S34, and the determination in step S36 is made. Will be in a state of repeating. Then, in this state 4, since the photographing position detection signal b is turned on, step S23 is performed through step 22 in FIG. 3B.
Then, the photographing signal c is output, and the camera 6 photographs the vicinity of the front surface of the main body of the large special vehicle 100. When the shooting is completed, the process returns to step S21 in FIG.

Then, in the state 5 shown in FIG. 10E (the state where the large special vehicle 100 passes the detection beams 11d and 12 and the detection beams 11d and 12d are not blocked), the sensing signals SA and SB are transmitted. Then, the photographing position detection signal b is turned off in step S37 in FIG. 9, the holding of the signal SA 'is released in step S38, and step S3 is performed.
Return to 1.

On the other hand, in a normal situation in which the pulley portion 102 at the tip of the boom 101, which is a protrusion above the front head of the large special vehicle 100, does not overlap the preceding passenger vehicle 100 'in the vehicle traveling direction, the large special vehicle is large. When the vehicle 100 passes through the lane 3, steps S32 to S33 in FIG. 9 are performed, and then steps S34 to S38 are performed, and then step S3 is performed.
It will return to 1. This operation is similar to the operation described with reference to FIGS. 4 and 5 in the first embodiment described above.

When a normal large vehicle such as a large truck that does not have a projection above the front of the head passes through the lane 3, the detection beam 11d is blocked and then the beam 12d is blocked. When the detection beam 12d is cut off by this, the operation is sequentially performed through steps S31 to S38 in FIG. 9, and when the front surface of the large vehicle reaches the position of the detection beam 12d, the photographing operation is performed.

As described above, according to the present embodiment, regardless of the type of vehicle, a portion suitable for photographing a large vehicle is at a predetermined photographing position (position of the detection beam 12d in the traveling direction of the vehicle).
It is possible to take a photograph at a position where an effective photographing result is obtained with respect to the front surface of the vehicle, the license plate, and the image of the driver.

Further, according to the present embodiment, even in a special situation in which a projection above the forehead of the large special vehicle overlaps with the small vehicle preceding the large special vehicle in the vehicle traveling direction, It is possible to appropriately detect the image capturing position of the large special vehicle and perform appropriate image capturing, and prevent erroneous image capturing.

Next, modifications of the above-described first and second embodiments will be described.

In the first and second embodiments described above, the vehicle detector 5B shown in FIGS. 2, 6, 7, and 8 (the vehicle detector 5B is the vehicle detector shown in FIGS. 12 and 13). (Corresponding to the container 5B)) was not provided. However, in the image capturing apparatus for a vehicle having an axial load violation according to the present invention, the vehicle detector 5B is added, and the control unit 8 controls the axial load violation detection signal a from the axial load measuring device 7 and the signal processing unit 13.
Not only the shooting position detection signal b from the vehicle detector 5B
Based on the sensing signal from the camera 6 as well, a predetermined shooting condition is determined, and when the output of the shooting position detection signal b from the signal processing unit 13 is started under the shooting condition, the shooting signal c is set to the camera 6
Alternatively, the camera 6 may be caused to perform a shooting operation.

As a result, for example, in the above-mentioned second conventional example, it is possible to obtain an image pickup apparatus for an axle load violation vehicle in which the vehicle detector 5A in FIG. 12 is replaced by the above-mentioned image pickup position detecting apparatus 10A. In this case, in the case of the large-sized special vehicle, which has occurred in the second conventional example, it is possible to eliminate the inconvenience that it is not possible to obtain an effective photographing result for the images of the front surface of the vehicle, the driver, and the license plate. The advantages of the second conventional example described above can be directly obtained.

Similarly, in the above-mentioned first and second embodiments, not only the vehicle detector 5B but also a vehicle detector 5C shown in FIG. 14 is added, and the control unit 8
Predetermined shooting conditions are determined based not only on the axial load violation detection signal a from the axial load measuring device 7 and the shooting position detection signal b from the signal processing unit 13 but also on the sensing signals from the vehicle detectors 5B and 5C. Then, when the output of the shooting position detection signal b from the signal processing unit 13 is started under the shooting conditions, the shooting signal c
May be given to the camera 6 to cause the camera 6 to perform a shooting operation.

As a result, for example, in the third conventional example described above, it is possible to obtain an image pickup apparatus for a vehicle in which the axle load is violated, in which the vehicle detector 5A in FIG. 14 is replaced by the above-described image pickup position detection apparatus 10A. In this case, in the case of the large special vehicle, which has occurred in the third conventional example, it is possible to eliminate the inconvenience that it is not possible to obtain an effective photographing result for the images of the front surface of the vehicle, the driver, and the license plate. The advantages of the third conventional example described above can be directly obtained.

Although the respective embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, the imaging position detection device for a large vehicle according to the present invention can be used not only in an imaging device for an axle load violation vehicle but also in various imaging devices for imaging a large vehicle.

[0107]

As described above, according to the photographing position detecting device for a large vehicle according to the present invention, not only when the large vehicle is a normal large vehicle such as a large truck, but also a truck crane, a rafter crane or the like. Even if it is a large special vehicle, it is possible to detect that the location suitable for shooting the large vehicle has reached a predetermined shooting position regardless of the vehicle type, and the front of the vehicle, driving It is possible for a person to take an image to obtain an effective shooting result for the image of the license plate.

Further, according to the photographing device for an axle load violation vehicle according to the present invention, not only when the axle load violation vehicle is a normal large vehicle such as a large truck, but also a large special vehicle such as a truck, a crane or a rough terrain crane. Even in such a case, it is possible to obtain an effective photographing result for the images of the front surface of the vehicle, the driver, and the license plate regardless of the vehicle type. Therefore, it is possible to remarkably improve the imaging performance of the vehicle in violation of the axial load, and to strengthen the warning and the instruction of the vehicle in violation of the axial load.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an image pickup apparatus for an axle load violation vehicle according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a state in which the image capturing device for an axle weight violation vehicle according to the first embodiment of the present invention is installed in a toll gate of a highway, and FIG. 2 (b) is a view taken along the line C-C in FIG. 2 (a).

FIG. 3 is a flowchart showing the operation of each part of the image capturing device for the vehicle having an axial load violation according to the first embodiment of the present invention,
FIG. 3A is a flowchart showing the operation of the signal processing unit,
FIG. 3B is a flowchart showing the operation of the control unit.

FIG. 4 is a side view showing a positional relationship between vehicles in various states in the image capturing device for a vehicle having an axial load violation according to the first embodiment of the present invention.

FIG. 5 is a time chart showing the operation of the image capturing apparatus for the vehicle in violation of axle load according to the first embodiment of the present invention.

6A and 6B are diagrams showing an arrangement example of two vehicle detectors of the photographing position detection device, FIG. 6A is a plan view corresponding to FIG. 2A, and FIG. 6 is a view taken along the line D-D in FIG.

7A and 7B are diagrams showing another arrangement example of two vehicle detectors of the photographing position detection device, FIG. 7A is a plan view corresponding to FIG. 2A, and FIG. It is an EE arrow line view in (a).

8A and 8B are views showing still another arrangement example of two vehicle detectors of the photographing position detection device, FIG. 8A is a plan view corresponding to FIG. 2A, and FIG. It is a FF arrow line view in 8 (a).

FIG. 9 is a flowchart showing an operation of a signal processing unit in the image capturing device for the vehicle having an axial load violation according to the second embodiment of the present invention.

FIG. 10 is a side view showing a positional relationship between vehicles in various states in the image capturing device for an axle weight violation vehicle according to the second embodiment of the present invention.

FIG. 11 is a time chart showing the operation of the image capturing device for the vehicle in violation of axle load according to the second embodiment of the present invention.

FIG. 12 is a diagram showing a first and a second conventional example of an image pickup device for an axle load violation vehicle, FIG. 12 (a) is a plan view thereof, and FIG.
2 (b) to 2 (d) are side views showing the positional relationship of vehicles in the image capturing apparatus.

FIG. 13 is a diagram showing a vehicle detector in the first and second conventional examples, and FIG. 13 (a) is an AA line in FIG. 12 (a).
FIG. 13 (b) is a view on arrow BB in FIG. 12 (a).

FIG. 14 is a plan view showing a photographing device of a vehicle according to a third conventional example, which violates an axial load.

FIG. 15 is a diagram showing an example of a large special vehicle.
FIG. 15A is a side view of a truck / crane, and FIG. 15B is a side view of a raft / crane.

[Description of sign]

 1 island 2 booth 3 lane 4 loading plate 6 camera 7 axial load measuring device 8 control unit 10A shooting position detection device 11, 12 vehicle detector 11a, 12a light emitter 11b, 12b light receiver 11c, 12c reflector 11d, 12d detection beam 13 signal processing unit 100 vehicle SA, SB sensing signal a axial load violation detection signal b shooting position detection signal c shooting signal

Claims (10)

[Claims] 1. A photographing position detection device for a large vehicle that detects when a large vehicle passing through a predetermined passage reaches a predetermined photographing position, wherein the passage is provided at a high position where the large vehicle is blocked and the small vehicle is not blocked. A first sensor that emits a first beam across the beam and outputs a first sensing signal when the first beam is blocked; and a forehead of a large special vehicle that is lower than the high position. A second beam that traverses the passage at a position lower than the upper protrusion, the second beam being close to the first beam with a gap or no gap in the vehicle traveling direction;
A second sensor that emits a beam of light and outputs a second sensing signal when the second beam is blocked; and the first and second sensing signals based on the first and second sensing signals. When the output of the first sensing signal is started in a state where both of the second sensing signals are not output, the output of the second sensing signal is started after the output of the first sensing signal is started. Output the shooting position detection signal when
When the output of the second sensing signal is started from the state, the shooting position detection signal is output when the output of the first sensing signal is started during the output of the second sensing signal. An image pickup position detection device for a large vehicle, comprising: a signal processing unit. 2. A photographing position detecting device for a large vehicle that detects that a large vehicle passing through a predetermined passage reaches a predetermined photographing position, wherein the passage is provided at a high position where the large vehicle is blocked and the small vehicle is not blocked. A first sensor that emits a first beam across the beam and outputs a first sensing signal when the first beam is blocked; and a forehead of a large special vehicle that is lower than the high position. A second beam that traverses the passage at a position lower than the upper protrusion, and is close to the first beam with a gap in the vehicle traveling direction, and is in the vehicle traveling direction with respect to the first beam. Emits a second beam located on the side of
A second sensor that outputs a second sensing signal when the second beam is blocked; and a second sensor that outputs a second sensing signal based on the first and second sensing signals. When the output of the first sensing signal is started in a state where both are not output, the shooting position detection signal is output when the output of the second sensing signal is started after the output of the first sensing signal is started. An image pickup position detecting device for a large vehicle, comprising: 3. A photographing position detecting device for a large vehicle that detects when a large vehicle passing through a predetermined passage reaches a predetermined photographing position, wherein the passage is provided at a high position where the large vehicle is blocked and the small vehicle is not blocked. A first sensor that emits a first beam across the beam and outputs a first sensing signal when the first beam is blocked; and a forehead of a large special vehicle that is lower than the high position. A second beam that traverses the passage at a position lower than the upper protrusion, and is close to the first beam with a gap in the vehicle traveling direction, and is in the vehicle traveling direction with respect to the first beam. Emits a second beam located on the side of
A second sensor that outputs a second sensing signal when the second beam is blocked; and a second sensor that outputs a second sensing signal based on the first and second sensing signals. When the output of the first sensing signal is started in a state where both are not output, the shooting position detection signal is output when the output of the second sensing signal is started after the output of the first sensing signal is started. And when the output of the second sensing signal is started from the state and the output of the first sensing signal is started during the output of the second sensing signal, 2. A photographing position detecting device for a large vehicle, comprising: a signal processing unit that outputs the photographing position detecting signal when the output of the sensing signal 2 is once ended and then restarted. 4. The second sensor according to claim 2, wherein the second sensor is arranged on the vehicle traveling direction side with a predetermined distance from the first sensor in the vehicle traveling direction. Image pickup device for large vehicles. 5. The second sensor, wherein the first and second sensors are arranged at substantially the same vehicle traveling direction position, and is imaged on a horizontal plane.
3. The first and second detectors are arranged so that the direction of the beam of the beam is inclined toward the vehicle traveling direction side with respect to the direction of the first beam mapped on a horizontal plane.
Alternatively, the image pickup position detection device for a large vehicle according to item 3. 6. The second beam, wherein the second sensor is arranged on the side in the vehicle traveling direction at a predetermined distance from the first sensor in the vehicle traveling direction, and is mapped on a horizontal plane. Of the first beam and the second beam of the first beam so as to be inclined toward the vehicle traveling direction side with respect to the direction of the first beam that is mapped on a horizontal plane.
2. The sensor of claim 2 is arranged.
The image pickup position detection device for the large vehicle described. 7. The method according to claim 5, wherein the direction of the first beam imaged on a horizontal plane is inclined to the side opposite to the vehicle traveling direction with respect to the direction orthogonal to the vehicle traveling direction on the horizontal plane. 6. A photographing position detection device for a large vehicle according to item 6. 8. The first beam crosses the passage so as to maintain substantially the same height, and the second beam crosses the passage obliquely downward from a predetermined height. An imaging position detection device for a large vehicle according to any one of 1 to 7. 9. The signal processing means includes the first and second signals.
9. The image pickup position detection device for a large vehicle according to claim 1, wherein the output of the image pickup position detection signal is ended when both of the detection signals of the above are ended. 10. The image pickup position detection device for a large vehicle according to claim 1, wherein the image pickup position detection device is provided on the side opposite to the vehicle traveling direction with respect to the first and second sensors, An axle load detector for detecting the axle load of a vehicle passing through the passage, and based on the output from the axle load detector, when the detected axle load exceeds a preset axle load, an axle load violation detection signal Axial load measuring device for outputting, an image pickup device provided on the side of the vehicle traveling direction with respect to the first and second sensors, for taking an image near the image pickup position, the axial load violation detection signal and the image pickup Control means for controlling the photographing device such that the photographing device performs a photographing operation when the photographing position detection device starts outputting the photographing position detection signal under a predetermined condition based on the position detection signal; Vehicles that violate the axle load, characterized by Imaging apparatus.