JPH0642320Y2 - Vehicle type identification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vehicle type identification device applied to an unmanned system such as a toll road and a toll parking lot.

[Prior Art] Generally, toll roads have different tolls for different types of vehicles such as a regular vehicle, a large type, and a large type. Therefore, in order to unmanned the exit gate at the interchange,
It is necessary to automatically and highly accurately determine the type of passing vehicle.

As a parameter for automatic discrimination of such vehicle type,
Conventionally, the number of axles, the number of wheels, the wheel distance (tread), and vehicle shape of a passing vehicle have been used.

FIG. 3 is a diagram showing an example of a conventional vehicle type identification device, and FIGS. 4 (a) and 4 (b) are diagrams showing vehicle types, that is, trucks and buses, which are identified by the device. In FIG.
Vehicle separators 11 and 21 are installed opposite to each other across the vehicle passage W. The vehicle separators 11 and 21 have a structure in which light emitters 12 (not shown) composed of a plurality of pairs of photoelectric tubes and light receivers 22 are vertically stacked on the opposite surfaces thereof at substantially equal intervals. As shown in the drawing, a vertical optical axis film P is formed on the vehicle passage W so that each passing vehicle can be separated. Based on the light-shielding signal from the upper light receiver 21a of the vehicle separator 21, the presence or absence of a gap A between the driver's cab and the loading platform (there is a truck but not a bus) and the lower light receiver 21
Based on the light-shielding signal b, the presence / absence of the unevenness B on the lower part of the vehicle body (there is on the track but not on the bus) is determined. 13,23 are overhang detectors,
Based on the light-shielding signal, the distance between the front end of the passing vehicle and the front wheels, that is, the overhang length is detected and determined. Here, as shown in FIGS. 4 (a) and 4 (b), the bus overhang length is more than the track overhang length LT.
LB generally uses long points to detect and determine the overhang length.

The vehicle height detectors 14 and 24 detect the vehicle height of a passing vehicle based on the light-shielding signal. Reference numeral 30 denotes an axle wheel detector, which is embedded in the vehicle passage W between the vehicle separators 11 and 21 and the passage W is shown in the figure based on the electric resistance that changes according to the treading action of the wheels of the passing vehicle. The number of axles, the number of wheels, and the wheel distance of a vehicle (not shown) traveling in the arrow direction TR are detected.

In the vehicle type discriminating unit (not shown) based on the vehicle shape, the bed shape, the overhang length, the vehicle height, the number of axles, the number of wheels, and the wheel distance information from the detectors 13, 23, 14, 24, and 30. By performing logical operations, etc., three types of vehicles, ordinary vehicles, one large vehicle, and two large vehicles, are determined.

[Problems to be Solved by the Invention] The conventional device having the above configuration has the following problems. That is, recently, there has been a tendency to further subdivide the conventional three types of vehicles, that is, a normal vehicle, a large vehicle, and two large vehicles, and some have become indistinguishable only by conventional detection information.

For example, when a conventional ordinary vehicle is subdivided into a light four-wheeled vehicle and an ordinary vehicle, and when it is attempted to discriminate using the conventional detection information, the only information that can be used for the discrimination is the wheel distance information (other It is not possible to identify it with information). However, since there is a portion where the wheel distance of a light four-wheeled vehicle and that of a standard vehicle overlap, high-precision discrimination cannot be performed.

FIG. 5 is a diagram showing the distribution of the passing algebra with respect to the wheel distance between a standard vehicle and a light four-wheel vehicle, and D shows the wheel distance distribution of the light four-wheel vehicle,
E indicates the wheel distance distribution of a standard car. As is clear from the figure, there is an overlapping portion (broken line portion z) in the wheel distance between the light four-wheeled vehicle and the ordinary vehicle. Therefore, it is not possible to determine which vehicle type the above-mentioned overlap portion belongs to. As a result, there has been a problem that the vehicle type cannot be accurately discriminated.

Therefore, the purpose of the present invention is to improve the ability to discriminate the vehicle type, and even if the conventional ordinary vehicle is subdivided into a light four-wheel vehicle and an ordinary vehicle,
(EN) Provided is a vehicle type identification device that can perform vehicle type identification more accurately and highly accurately, and has a relatively simple configuration, and that can easily realize a highly reliable unmanned system for toll roads and toll parking lots. Especially.

[Means for Solving Problems] The present invention has taken the following means in order to solve the above problems and achieve the object. That is, a vehicle separator that has a plurality of vertically stacked stacks of light emitters and receivers and is installed to face each other across a vehicle passage, and is embedded in the vehicle passage corresponding to the installation position of this vehicle separator. , An axle detector that detects the number of axles, the number of wheels, and the wheel distance of the vehicle based on the electric resistance value that changes according to the treading force of the wheels of the passing vehicle, and a vehicle height detector that detects the vehicle height of the passing vehicle And an overhang detector for detecting an overhang necessary for recognizing the shape of a passing vehicle, and a vehicle separated from the vehicle separator by a set distance. A single vehicle length detector provided to detect whether or not the length is within a specified length of a light four-wheel vehicle, and the vehicle separator, vehicle height detector, overhang detector, vehicle length detector , The detection information output from the Number of axes to be output respectively, so and a vehicle type discriminating unit that performs vehicle type identification including determination of the mini-wheel vehicle and other vehicles based on the wheel speed and Wa距 information.

[Operation] As a result of taking such means, the following operation occurs. Since information about whether the passing vehicle is a light four-wheeled vehicle is given, the vehicle type discrimination ability is dramatically improved, and even when the conventional ordinary vehicle is subdivided into a light four-wheeled vehicle and an ordinary vehicle, The vehicle type can be discriminated more accurately and accurately. Moreover, since it can be realized only by adding the minimum required detector in association with the vehicle separator, the configuration is relatively simple, and a highly reliable unmanned system for toll roads and toll parking lots can be easily realized. Will be things.

[Embodiment] FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention. The same parts as those shown in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted.

A feature of this device is that, for example, an optical or ultrasonic type vehicle length detector 15, 25 is newly provided in the conventional vehicle type identification device. The vehicle length detectors 15 and 25 literally detect the length of the vehicle. It is installed at a position separated from the vehicle separators 11, 21 by a distance x.

FIG. 2 is a diagram showing the vehicle length distributions of a light four-wheeled vehicle and an ordinary vehicle.
The commander of a mini automobile is based on the Road Transport Vehicle Construction Law Regulations 3.
Since it is regulated to be 2 m or less (as of May 19, 1987),
As shown in the figure, the vehicle length distribution F of the light four-wheeled vehicle and the vehicle length distribution G of the ordinary vehicle are clearly separated at the threshold value X1. Therefore, by setting the distance x from the vehicle separators 11 and 21 to the vehicle length detectors 15 and 25 to the threshold value X1, it is possible to distinguish between a light four-wheeled vehicle and a standard vehicle.

Next, the operation of the present apparatus configured as described above will be described. When the vehicle approaches the vehicle separators 11 and 21, the optical paths of some of the light emitters and receivers are blocked, and a light blocking signal is generated from the receivers of the blocked optical paths. That is, the presence or absence of the gap A between the driver's cab and the loading platform is determined based on the light-shielding signal from the upper light receiver 22a, and the presence or absence B of the vehicle body is determined based on the light-shielding signal from the lower light receiver 22b. The overhang detectors 13 and 23 detect the overhang length, and the vehicle height detectors 14 and 24 detect the vehicle height. As the vehicle progresses further, the axle wheel detector 30
When the pedal is depressed, the electric resistance changes, and the number of axes and the like are detected. Then, the vehicle length is measured from the relationship between the vehicle length detectors 15 and 25 and the vehicle separators 11 and 21 which are set at a position separated by a distance x from the vehicle separators 11 and 21. When the measured value is smaller than the threshold value X1, it is determined that the vehicle is a four-wheeled vehicle, and when the measured value is greater than the threshold value X1, it is determined that the vehicle is a standard vehicle.

Therefore, according to this embodiment, in addition to the conventional discrimination information,
Since the vehicle length information is added as a vehicle type discrimination parameter, the vehicle type can be discriminated with high accuracy.

The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Advantage of the Invention] According to the present invention, a single vehicle length detector is installed at a position separated from the vehicle separator by a set distance. A means for detecting whether or not the vehicle is within the specified length, adding the detected information as vehicle type discrimination information, and performing vehicle type discrimination including discrimination between a light four-wheel vehicle and another vehicle Is characterized by.

Therefore, according to the present invention, since information as to whether a passing vehicle is a light four-wheeled vehicle is given, the ability to discriminate the vehicle type is dramatically improved, and the conventional ordinary vehicle is divided into a light four-wheeled vehicle and an ordinary vehicle. Even if it is subdivided, the vehicle type can be discriminated more accurately and with high accuracy, and it can be realized by simply adding the minimum required detector in association with the vehicle separator, so the configuration is relatively simple. Therefore, it is possible to provide a vehicle type identification device that can easily realize a highly reliable unmanned system for toll roads and toll parking lots.

[Brief description of drawings]

1 and 2 are views showing an embodiment of the present invention. FIG. 1 is a perspective view showing a schematic structure of a vehicle type discriminating device, and FIG. 2 is a vehicle length distribution between a light four-wheeled vehicle and an ordinary vehicle. FIG. 3 to 5 are views showing a conventional example, FIG. 3 is a perspective view showing a schematic configuration of a vehicle type identification device, FIG. 4 is a view showing an example of a vehicle type, and FIG.
The figure shows the wheel distance distribution between a light four-wheeled vehicle and an ordinary vehicle. 11,21 …… Vehicle separator, 13,23 …… Overhang detector,
14,24 …… Vehicle height detector, 15,25 …… Vehicle length detector, 22a ……
Upper light receiving part, 22b …… Lower light receiving device, 30 …… Axle wheel detector,
A: gap, B: uneven portion, LB ... bus overhang length, LT ... truck overhang length, P ... optical axis film, W ... vehicle passage, TR ... vehicle passage direction, z …… Wheel overlap between light four-wheeled vehicle and ordinary vehicle, X1 …… Threshold value, x …… Distance from vehicle separator to vehicle length detector.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Ishii 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (56) Reference JP 62-179099 (JP, A) JP-A-50-24096 (JP, A) JP-A-52-4251 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A vehicle separator having a plurality of vertically stacked stacks of light emitters / receivers and facing each other across a vehicle passage, and a vehicle passage corresponding to the installation position of the vehicle separator. Axle wheel detector that is embedded in the vehicle and detects the number of axles, the number of wheels, and the wheel distance of the vehicle based on the electric resistance value that changes according to the wheel treading action of the passing vehicle, and the vehicle height that detects the vehicle height of the passing vehicle. A detector, an overhang detector that detects an overhang necessary for recognizing the shape of a passing vehicle, and a vehicle that is installed at a position separated from the vehicle separator by a set distance, and passes through because of the relationship with the vehicle separator. A single vehicle length detector provided to detect whether or not the vehicle length of the vehicle is within a specified length of a light four-wheel vehicle; and the vehicle separator, vehicle height detector, overhang detector,
Discrimination between a light four-wheel vehicle and another vehicle based on the detection information output from the vehicle length detector, and the number of axes, the number of wheels, and the wheel distance information output from the axle wheel detector. A vehicle type discriminating device comprising: a vehicle type discriminating section for discriminating a vehicle type.