JPS62196800A - Vehicle type discriminator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a vehicle type discrimination device installed at a toll collection station on an automobile road, etc., and particularly a device capable of discriminating between a large vehicle and two motorcycles traveling in parallel. Concerning configuration.

[Prior art and its problems]

Currently, at toll gates on toll expressways, drivers are issued a magnetic card-type ticket that records information such as the number of axles, number of wheels, vehicle type, gate number, etc. of passing vehicles at the entrance gate, and this ticket is exchanged at the exit gate. The recorded information is compared with the actual status of passing vehicles in order to prevent fraud and speed up data processing operations. In order to automatically record the information on the pass ticket and perform the verification at the exit gate, a vehicle type identification device is installed at each of the entrance gate and the exit gate. As a car type discrimination device, it was developed in 1986-250.
A device such as that described in Japanese Patent No. 960 is known.

However, in recent years, there has been a strong consensus that motorcycles, which were previously included in the classification of ordinary cars in the toll system of toll expressways, should be classified separately from ordinary cars, and for this reason, road administrators is considering changing its toll system, but since the conventional vehicle type discrimination device described above is configured based on the above-mentioned toll structure, it cannot distinguish between motorcycles, and as a result, the conventional vehicle type discrimination device has no automatic The problem is that it cannot be applied to a new toll system that separates motorcycles and regular cars.

From now on, motorcycles may be simply referred to as ``private cars''.

[Purpose of the invention]

The present invention solves the problems in the conventional vehicle type discrimination-4fc* as described above, and provides a vehicle type discrimination device that can distinguish two motorcycles traveling in parallel that are confused with a large vehicle. The purpose is to

[Key points of the invention]

In order to achieve the above object, the present invention outputs first and wJ2 pressure position signals corresponding to the position of the pressure when the pedal is pressed, and outputs first and second pressure position signals corresponding to the width of the pressure.
The first and second sensors are each shaped like a belt and each output a pedal pressure width signal, and the third sensor is a strip-shaped sensor that outputs a binary signal in °C depending on the presence or absence of pedal pressure and a pedal pressure detection signal in °C. The first sensor, the third sensor, and the second sensor are arranged in a line on the road surface of the passageway in the order from the left side in the width direction of the passageway, with the longitudinal directions of the sensors substantially perpendicular to the vehicle passageway. tread calculation means for calculating the tread of the vehicle that has pressed the first to third sensors using the first and second pedal pressure position signals and the first and second pedal pressure width signals; First and second binarization means are provided to respectively binarize the tread pressure width signal, and the first calculation is performed using the first and second tread pressure position signals, the tread pressure detection signal, and the output signal of the tread calculation means. determining the type of vehicle by means of means and extracting cases where the vehicle is a large vehicle;
Thereafter, this discrimination result and the tire width of the vehicle represented by the output signals of the first and second binarization means are taken into account by the second calculation means, and the two translating motorcycles and large vehicles are determined. It is designed to be able to distinguish between

[Embodiments of the invention]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of the arrangement of the main parts shown in Fig. 1, and Fig. 3 is an explanatory diagram of the configuration and operating principle of the sensor shown in Fig. 1. be. 1 to 3, reference numeral 4 indicates a vehicle passageway of a predetermined width provided at a toll gate of a toll motorway, and reference numeral 112.3 indicates a belt-shaped first passageway fixed on the road surface 4a of the passageway 4. sensor, second
sensor.

This is the third sensor. These Senna are vehicles or moving P
The first seven sensors 1, the third sensors 3, and the second sensors 2 are arranged in this order from the left side in the direction of the arrow, and are arranged in a line with the longitudinal direction of each sensor substantially perpendicular to the passageway 4. There is. As shown in FIG. 3, the sensors 1 and 2 each have a ribbon-shaped conductor 5, a ribbon-shaped resistor 6 disposed opposite to this conductor, and a conductor 5 and a resistor 6 embedded therein. When a wheel 8 or 9 of a vehicle passing through the vehicle passageway 4 is pressed down at the X or Y position, the conductor 5 and the resistor 6 are connected to the wheel at these positions. 80 width Wj or wheel 90 width W
Contact by r. However, since a predetermined amount of current is applied to the resistor 6 by a means not shown, when the conductor 5 and the resistor 6 come into contact as described above, an analog signal corresponding to the distance PI is output from the sensor 1. voltage signal is terminal 1
01° 102 as the first pedal pressure position signal 1a, and the sensor 2 outputs an analog voltage signal corresponding to the distance Pr from the terminal 2011202 as the second pedal pressure position signal 2a. PI is the distance from the end where the terminals 101 and 102 of the sensor l are provided to the right side of the wheel 8, and Pr is the distance from the end where the terminals 201 and 202 of the sensor 2 are provided to the wheel 9.
is the distance to the left side of the Further, when the conductor 5 and the resistor 6 come into contact as described above, an analog voltage signal corresponding to the wheel width Wl is transmitted from the sensor 1 to the first terminal 101, 103.
The sensor 2 outputs an analog voltage signal corresponding to the wheel width W as the second pedal pressure width signal 2b from the terminal 201.2Q3.
It is composed of two conductors 5 arranged opposite to each other and an elastic body 7 in which these conductors 5 are embedded, and when pressed by wheels 8 or 9, the groove bodies 5 and 5 are short-circuited. It is configured.

301 and 302 are terminals provided on the sensor 3 to output this short circuit signal. This short circuit signal is for wheels 8 or 9.
Since the signal is generated by the pedal pressure, the sensor 3 is a sensor that outputs a pedal pressure detection signal 3a as a binary signal depending on the presence or absence of the pedal pressure.

Reference numeral 10 denotes a pedal pressure detection sensor consisting of sensor 1, sensor 2, and sensor 3. In detection sensor 10, sensors 1, 2, and 3 are arranged so that the left and right wheels of an automobile having left and right wheels do not press the same sensor. It is arranged on the road surface 4a. Reference numeral 11 represents an island forming the vehicle passageway 4, and reference numeral 12 represents a booth installed on the island 11 for issuing passes and the like.

One of the islands 11 is provided with a light emitter 14 that emits a light beam 13 so as to cross the vehicle passageway 4, and the other island IIK is provided with a light receiver 15 that receives the light beam 13. The light beam 13 is arranged directly above the pedal pressure detection sensor 10 and is configured to detect a vehicle entering the passageway 4. Each output signal xatlb* of sensors 1, 2+3
2a+2bt3a and the output signal 15a of the light receiver 15 are both sent to a signal processing unit 16, which will be described later, housed in the booth 12.
has been entered.

Reference numeral 17 in FIG. 1 is a calculation means that receives the signal 1a+1bt2a*2b and calculates the tread T of a vehicle having left wheels 8 and right wheels 9 according to equation (1), and K in equation (1) is the sensor 1. 3 and the distance between sensors 3 and 2.

T = K + Pj + Pr + (1/2) (Wj + W
r)...-(1) The output signal 17a of the calculation means 17 corresponding to the tread T is input to the binarization means 18, where the magnitude of T is compared with a built-in threshold value and binarized. The resulting signal 18a is output. This threshold is the signal 17
This is a value for determining whether the vehicle having the tread T represented by a is a large vehicle.

Since both sensors 1 and 2 are configured as described above, the pedal pressure position signal 1 a + 2 a is determined by the sensor 1,
If 2 is not pressed, it will be in a no-voltage state, and if it is pressed, it will be in a zero or finite voltage state. 19.20, such signals 1a + 2a are respectively input,
Each of these signals is a binarization means that outputs a binary signal 19a120a depending on whether or not it is in a no-voltage state, and 21 is a signal 19a+20a and a pedal pressure detection signal 3a.
is input, and in the logical operation described later, the signal 19a is
.

This is a first logical calculation means that outputs a signal 21a indicating that the vehicle that generated the signals 20a and 3a is a regular car or a large vehicle having both left and right wheels, and is not a single motorcycle. This signal 21a and the binarized signal 18a output from the binarizing means 18, which corresponds to the validity of the large vehicle, are input to the second logic operation means 22, where the vehicle type of the vehicle represented by the signal 21a is determined. , when the vehicle generating the signal 18a+21a is determined to be a large vehicle, a first discrimination signal 22a is output. Reference numeral 23 denotes a first calculation means consisting of binarization means 18 to 20 and logical calculation means 21 and 22. Since each part of this calculation means 23 operates as described above, 23 ultimately receives the pedal pressure position signal i a t2a, the tread pressure detection signal 3a, and the output signal 17a of the tread calculation means are input, and when the vehicle that has treaded on the sensors 1 to 3 is determined to be a large vehicle by calculation, the first calculation means outputs a first discrimination signal 22.8. be.

24 and 25 are first and second binarization means for manually inputting the pedal pressure width signals ib and 2b, comparing these signals with built-in threshold values, and outputting binarized signals 248 to 258, respectively; The above threshold value is 70 (ts) to 300 (
II). The reason why we chose this threshold value is because the width of the pedal pressure W i + W r by the wheels 8 or 9 as shown in Fig. 3 is 300 [W] or more in the case of a large vehicle, and the width W 7 if
This is because the inventor of the present invention has found through long-term field tests that it is less than 0. Therefore signal 24a.

25a, it is possible to distinguish between large vehicles and motorcycles. 26 receives the binary signals 24a, 25a and the first discrimination signal 22a, and is the signal 24a.

25a is a second calculation means that outputs a second discrimination signal 26a when the signal corresponds to a motorcycle; in this case, since the discrimination signal 22a is a signal representing a large vehicle, the signal 26a is a signal corresponding to two motorcycles moving in parallel. It is thought to represent a two-wheeled vehicle.

Reference numeral 16 in FIG. 1 is a signal processing section consisting of the various parts shown in the figure except for the sensors 1 to 3, and this processing section 16 is housed in the booth 12 in FIG. 2 as described above.

Next, the logical operation operations in the logical operation means 21-22 and the operation means 26 in FIG. 1 will be explained using the flowchart in FIG. 4. Passage path 4 for vehicles as shown in Figure 2
The detection signal 15a is output from the light receiver 15,
When this signal is input to the logic operation means 21, the means 2
At step S1, the presence or absence of the signal 19a, that is, whether or not the 17th sensor 1 is pressed is checked.If the signal 19a is present, that is, if it is pressed, then in step S, the sensor 3 is pressed and a signal is sent. Check to see if 3a is turned on. In step S1, the signal 19a
If there is no signal 19a, sensors 1 to 3 are arranged in the passageway 4 so that a large vehicle will always press the sensors 1 and 2 (no signal 19a should not occur when a large vehicle enters the passageway 4). Therefore, step S is in a standby state until signal 19a is turned on.In the case of a large vehicle, when sensor 1 is pressed for the above reason, sensor 2 is always pressed, so signal 3a is turned on in step S2. This state does not correspond to the state of large vehicle tread pressure.Therefore, step S is signal 3a.
It will be in standby mode until it turns off.

When the signal 3a is turned off in step S, it is then checked in step S whether or not the signal 20a is present.

A state in which the signal 20a is absent is a state in which the sensor 2 is not pressed, and such a state does not occur in large vehicles, so in step S, the standby state continues until the signal 20a becomes present, and when the signal 20a becomes present, At this time, the first logic operation means 21 outputs a signal 21a. As is clear from the above, in this case, sensors 1 and 2 are pressed and sensor 3 is not pressed, so the signal 21a is
Assuming that only one vehicle has stepped on the vehicle, this will be a signal indicating that a vehicle with wheels on the left and right sides has been detected. The automobile referred to here is a general term for vehicles consisting of regular cars and large cars. When the signal 21a is output from the calculation means 21 in step S1,
Subsequently, the second logic operation means 22 performs a logic operation in step S4. That is, in this step, the signal 18
If a corresponds to a large vehicle, that is, the tread size is T, a determination signal 22a is output from the calculation means 22, and step S4 shifts to step S. Since the discrimination signal 22a is output as described above, the sensor 1
, 2. Assuming that only one vehicle has stepped on 2, this will be the signal when a large vehicle is detected. Note that the state in which T is not large in step S4 is a state that occurs in the case of a regular car, as is clear from the above.

When the signal 22a is input to the arithmetic means 26, a logical operation in step S4 is performed. That is, in this case, as described above, the signals 24a and 25a are checked to determine the signal 22a.
In other words, whether the width of the tire is large or small is taken into consideration.If the width of the tire is small, the pressure of the sensors 1 and 2 in this case is considered to be due to the translation of the two motorcycles. As a result, the determination signal 2 is output from the calculation means 26.
6a will be output. A state in which the pedal pressure width becomes large in step SS occurs when the vehicle that pressed the sensors 1 and 2 is indeed a large vehicle.

In FIGS. 1 to 2J13, each part is constructed as described above. Therefore, if such a vehicle type discrimination device is used, the second discrimination signal 26 output from the second calculation means 26
According to a, two motorcycles moving in parallel on the vehicle passageway 4 and a large vehicle can be distinguished and recognized.

〔Effect of the invention〕

As described above, in the present invention, when a pedal is pressed, first and second pressure position signals corresponding to the position of the pressure are output, and first and second pressure width signals corresponding to the width of the pedal are output. The first and second sensors are each shaped like a band and output a pedal pressure, respectively, and the third sensor is shaped like a strip and outputs a pedal pressure detection signal as a binary signal depending on the presence or absence of pedal pressure. A third sensor and a second sensor are arranged in a line on the road surface of the passageway in the order of 1.5 cm from the left side in the width direction of the passageway, so that they are all substantially orthogonal to the vehicle passageway; Furthermore, a tread calculation means for calculating the tread of the vehicle that has pressed the first to third sensors using the first and @2 pedal pressure position signals and the first and second pedal pressure width signals; First and second binarization means for binarizing each of the signals are provided, and first the first and second tread pressure position signals, the tread pressure detection signal, and the output signal of the tread calculation means are used to calculate the signal by the first calculation means. The type of vehicle is determined and a case where the vehicle is a large vehicle is extracted, and then this determination result and the tire width of the vehicle represented by each output signal of the first and second binarization means are subjected to a second calculation. Since the present invention has been taken into consideration depending on the means,
The output of the second calculation means has the effect of easily distinguishing between a large vehicle and two motorcycles traveling in parallel.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the arrangement of the main parts shown in FIG. 1, and FIG. 3 is an explanatory diagram of the configuration and operating principle of the sensor shown in FIG. '1s4factor' is a flowchart for explaining the logical operation operation of the main part in FIG. 1...First sensor, 1a...First pedal pressure position signal, 1b...First pedal pressure width signal, 2...
...@2 sensor, 2a...2nd pedal pressure position signal, 2b...2nd pedal pressure width signal, 3...3rd sensor, 3a...・Stepping pressure detection signal, 4...
...Vehicle passageway, 4a...Road surface, 17...
... Tread calculation means, 22a ... First discrimination key number, 23 ... Audience 1 calculation means, 24 ...
・Secondly, valorization means, 25...:, -'1") 蒲 2 Figure

Claims (1)

[Claims] They are installed on the left and right side road surfaces in the width direction of the vehicle passageway so as to be substantially orthogonal to the vehicle passageway and in a line, and output first and second pressure position signals corresponding to the pressure position, respectively, and also output the first and second pressure position signals corresponding to the pressure position. The first and second pedal pressure width signals are respectively output in accordance with the width of the strip.
and a second sensor between the first and second sensors on the road surface at a central portion in the width direction of the vehicle passageway.
a belt-shaped third sensor that is installed in line with the sensor and outputs a pedal pressure detection signal depending on the presence or absence of pedal pressure; and the first and second pedal pressure position signals and the first and second pedal pressure width signals. a tread calculating means for calculating the tread of the vehicle that has been input and has stepped on the first to third sensors and outputting a signal according to the calculation result; and the first and second tread pressure position signals and the tread pressure detection signal. a first calculation means which receives the output signal of the toread calculation means and outputs a first discrimination signal when the vehicle is determined to be a large vehicle by calculation;
First and second binarization means for binarizing each of the first and second pedal pressure width signals, and each output signal of the two binarization means and the first discrimination signal are inputted and processed according to a predetermined logic. a second calculation means for performing calculation and outputting the calculation result as a second discrimination signal, and determining the vehicle as two motorcycles moving in translation based on the second discrimination signal. .