JPH0632153B2 - Vehicle type identification device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle type identification device installed at a toll collection point or the like on an automobile road, and more particularly to a translating or advancing motorcycle as a multi-axis large vehicle or the like. The present invention relates to device configurations that can be distinguished.

[Prior art and its problems]

2. Description of the Related Art Conventionally, a vehicle type discriminating device for automatically discriminating a vehicle type of a passing vehicle is provided at each of an entrance gate and an exit gate on a toll road, and tolls are collected based on the discrimination result by this device. This vehicle type identification device usually detects a curtain-shaped light beam provided across the vehicle passage from above the road surface of the vehicle passage to above the road surface, and detects a pedaling pressure on the vehicle passage road surface by the vehicle to generate a pulsed light. A pedal pressure detection sensor that outputs a pedal pressure detection signal,
When even a part of the curtain light flux is blocked, a detection signal output section that continues to output the vehicle detection signal while the interruption continues is provided, and when the vehicle detection signal is output from the detection signal output section. While the signal is being output, one vehicle is considered to be passing through the curtain-shaped light flux.
Then, the tread pressure detection signal output while the vehicle detection signal is being output is counted to determine the vehicle type of the vehicle that has passed through the curtain-shaped light flux. The counting of the pedal pressure detection signal is performed to measure the number of axles in the vehicle.

Since the conventional vehicle type identification device is configured as described above, when a plurality of motorcycles are translating or advancing to the entrance gate or the exit gate, the vehicle detection output from the detection signal output unit is performed. The signal is not a continuous signal output for each motorcycle, but a series of continuous signals. Therefore, in such a case, the vehicle type identification device described above will erroneously identify a plurality of motorcycles as a connected vehicle in which a plurality of vehicles are connected or a single multi-axle vehicle. That is, the conventional vehicle type identification device as described above has a problem in that it is not possible to distinguish a motorcycle that is translating or advancing at a gate from a multi-axis large vehicle or the like.

[Object of the Invention]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems in the conventional device as described above and provide a vehicle type identification device capable of distinguishing a translating or advancing motorcycle from a multi-axis large automobile or the like.

[Main points of the invention]

In order to achieve the above object, the present invention provides a first light flux in a curtain shape that is substantially perpendicular to both the road surface of the vehicle passage and the traveling direction of the vehicle on the passage and crosses the vehicle passage. A first optical sensor that forms a light beam and outputs a first detection signal when the first light flux is blocked; and a first optical sensor that is within the curtain surface of the first light flux, or that is near the curtain surface near the curtain surface. A second optical sensor that forms a beam-like second light flux by making them parallel to each other, and outputs a second detection signal when the second light flux is blocked, and a second light sensor provided almost directly below the first light flux. The above-described pedal pressure detection sensor, and a signal processing unit that performs predetermined signal processing on the first and second detection signals and the pedal pressure detection signal output by the pedal pressure detection sensor, and the vehicle based on the output signal of the signal processing unit. Configured the vehicle type identification device to perform the vehicle type identification Since, in particular in the discriminating apparatus, the second
The light flux is installed at a height where it can be blocked by a driver who is riding on a motorcycle that passes through a vehicle passage. Then, with this configuration, the second
In the case of a motorcycle in which the front-rear relationship between the output time of the detection signal and the output time of the pedaling pressure detection signal that is first output after the first detection signal is translated or continuous, and in the case of a multi-axis large vehicle, etc. Since they are opposite, the opposite case is utilized to distinguish between the above two cases.

Example of Invention

FIG. 1 is a configuration explanatory view of an embodiment of the present invention. In the figure, 1 is a vehicle passageway at a toll booth of a toll road, 2 and 2 are islands forming the passageway 1, 3 is a booth installed on the island 2 for issuing toll tickets and collecting road passage fees Is. Reference numeral 4 denotes a curtain-shaped first luminous flux which is substantially perpendicular to both the road surface 1a of the vehicle passage and the traveling direction P of the vehicle on the passage 1, and which is formed so as to cross the passage 1. A first light projector is installed on one island 2 so as to emit the first light beam 4, and a light receiver 6 is installed on the other island 2 so as to receive the first light beam 4. Reference numeral 7 denotes a first optical sensor including a light projector 5 and a light receiver 6. In the optical sensor 7, if even a part of the light beam 4 is cut off, the first detection signal from the light receiver 6 during the cutoff time. 7a is continuously output. The light beam 4 may be formed by a number of parallel light beams. Reference numeral 8 denotes a beam-shaped second light flux formed near the curtain surface of the first light flux 4 so as to be substantially parallel to the curtain surface, 9 denotes a second light projector for emitting the second light flux 8, and 10 denotes a second light flux. The second light receiver receives the light flux 8.
The light projectors 5 and 9 are integrally formed, and the light receivers 6 and 10 are also integrally formed. 11 is a projector 9 and a receiver 1
0 is a second optical sensor, and the optical sensor 11 is configured such that when the light beam 8 is cut off, the second detection signal 11a is continuously output from the light receiver 10 during the time during which the light beam 8 is cut off. There is. The second light flux 8 is parallel to the road surface 1a of the vehicle passage 1, and has a height H from the road surface. The light flux 8 may be formed so as to be within the curtain surface of the first light flux 4.

Reference numeral 12 denotes a tread pressure detection sensor which is attached to or buried in the road surface of the passage 1 directly below the first light flux 4, and this sensor is formed in a strip shape so as to cover the passage 1 entirely in its width direction. Then, two parallel ribbon-shaped electrodes extending in the longitudinal direction thereof, that is, the width direction of the passage 1 are embedded in the sensor 12, and when the vehicle passing through the passage 1 steps on the sensor 12, both electrodes are separated. The sensor 1 detects that the pedal pressure detection signal 12a is in contact with the vehicle and indicates that the pedal pressure is detected by the vehicle.
2 is output. The sensor 12 may be divided into a plurality of pieces along the longitudinal direction of the strip. The signal 7a, 11a, and 12a is input to 13 and is subjected to signal processing as described below to obtain a light beam 4
It is a signal processing unit that outputs a third determination signal 13a when the vehicle crossing is a motorcycle that is translating or continuing. The signal 13a is a toll collection terminal device 14 installed in the booth 3.
Has been entered in. In the figure, the signal processing unit 13 is arranged separately from the light receivers 6 and 10. However, this is drawn as shown in the figure for convenience of description, and the signal processing unit 13 is actually the light receiver 6 It is installed inside. Reference numeral 15 denotes a vehicle type discriminating device including the illustrated parts except the vehicle passage 1, the islands 2 and 2, and the booth 3.

FIG. 2 is a configuration diagram of the signal processing unit 13 described above. Second
In the figure, reference numeral 16 is a counting means for counting the number of pulse-like pedal pressure detection signals 12a input while the first detection signal 7a is being input, and the counting means further comprises: , The count result for the signal 12a is 3
With the above, the first discrimination signal 16a is also configured to be output as the H level state of the binary signal. 17 is
Before and after the time α when the second detection signal 11a is input and the input time β of the pedal pressure detection signal 12a that is first input after the first detection signal 7a is input, the time β is the time α.
Before that, a signal sequence detecting means for outputting the second discrimination signal 17a as an H level state of a binary signal, and 18 is a third discrimination signal 13a when the signals 16a and 17a are inputted.
Is a logical operation means for outputting as an H level state of a binary signal. The signal 13a is, as will be seen later,
This signal represents the presence of a plurality of motorcycles that are translating or advancing.

FIG. 3 is an explanatory diagram for explaining the operation of the above-described discrimination device 15, and FIG. 3 (A) is a side view showing a traveling state sequence of an automobile traveling on the vehicle passage 1. In the figure (A), 19 is a three-axis large-sized automobile, 20 and 21 are both motorcycles in which one part is in a translation state, and 20a and 2a.
1a shows each driver who is riding on these two-wheeled vehicles. In this case, in the two-wheeled vehicle 20, 21, the rear wheel of the former 20 and the front wheel of the latter 21 are in translation. 8a is a car 1
9 shows an imaginary line to be scanned by the motorcycles 20 and 21 when the motorcycle 20 and 21 crosses the second light flux 8 and the height of this virtual line 8a from the road surface 1a of the vehicle passage. Is H as is clear from the above-mentioned place. Then, in the vehicle type identification device 15, H is set so that the light flux 8 can be blocked by the drivers 20a and 21a. FIG. 2 (B) appears when the automobile 19, the motorcycles 20 and 21 travel in the state of FIG. 2 (A) so that they cross the luminous fluxes 4 and 8 and step on the detection sensor 12. In the waveform explanatory diagram of the signals 12a, 11a, and 7a, this figure (B) shows that, for convenience of explanation, the luminous fluxes 4, 8 and the sensor 12 are relatively opposite to the P arrow direction with respect to the automobile 19 and the two-wheeled vehicles 20, 21. It is drawn as if it had moved in the direction.

Next, the operation of the discriminating device 15 shown in FIG. 1 will be described with reference to FIGS. 2 and 3. Assuming that the automobile 19 and the motorcycles 20 and 21 proceed as shown in FIG. 3 (A), the light receiver 6, at the time t ₁ when the tip 19a of the automobile 19 crosses the light beams 4 and 8. 10 from the detection signal 7a, 11a are outputted, these signals 7a, 11a disappears at time _{t 3} when the rear end 19b of the motor vehicle 19 passes the position of the light beam 4,8. In automobile 19, the front wheel 19c is because the rear than the tip 19a, the time from time t ₁ △ T ₁ only shaped At the time t ₂ has elapsed pulse trampling detection signal 12a is output from the sensor 12. In addition From the sensor 12 to the vehicle 1 between the time t ₂ and the time t _3.
The number of signals 12a equal to the number of axles of the rear wheels in 9 is output. From time t ₁ to time t ₃ , the signals 7a,
Since 11a and 12a change as described above, the counting means 16 is ready to count the signal 12a at time t ₁ .
This countable state disappears at time t ₃ . Then, at time t ₃ , the counting result of the signal 12a in the counting means 16 is 3, so that the counting means 16 has the first H-level signal.
The discrimination signal 16a is output. Also, the signal sequence detection means 17
Is the time t ₁ when the second detection signal 11a is input,
First occurrence trampling detection signal 12a is the time t ₂ is the time t at the time t ₂ that is input after the detection signal 7a is generated
Because later than _1, until reaching the time t _3, maintains the state of not outputting a second determination signal 17a of an H level. Therefore until reaching the time t _3, never from the logical operation means 18 is a third determination signal 13a is output.

Although At time t ₄ when following the time t ₃ is a front wheel of the motorcycle 20 signal 7a is output traverses the light beam 4, the signal 11a is not output because this time does not cross the motorcycle 20 Hamada light beam 8. Then since At time t ₅ a little delayed from the time t ₄ is the front wheel of the motorcycle 20 to treading the sensor 12 is output again signals 12a, becomes from time t ₅ to the time △ T ₂ has elapsed time t ₆ was, in turn Since the driver 20a cuts off the light flux 8, the detection signal 11a is output. Signal 11
The a disappears when the driver 20a finishes crossing the light flux 8.
In the figure, at the subsequent time t ₇ , the rear wheel of the two-wheeled vehicle 20 and the front wheel of the two-wheeled person 21 step on the sensor 12 almost at the same time, so the signal 12a is output at this time, and the time ΔT ₃ has elapsed from the time t _7. the driver 21a become t time _{t 8} was
Starts to traverse the light beam 8 and a signal 11a is output.
This signal disappears as the motorcycle 14 advances.
The signal 7a also disappears at time t _{9 when} the rear end of the two-wheeled vehicle 21 ends crossing the light flux 4. The trampling detection signal 12a during from time t ₄ to time t ₉ is three output is apparent from the illustrated and described above.

Between time t ₃ and time t ₉ , the signals 7a, 1
Since 1a and 12a change as described above, the counting means 1
6 is a countable state between the time _{t 4} to _{t 9.} Then, the counting means 16 is configured to set the output signal 16a to the L level and clear the existing counting contents when the detection signal 7a is input at the time t ₄ , but the detection signal is reached at the time t _5. 12a starts to be input, so counting means 1
6 performs the counting operation again, and when the signal 7a disappears at time t ₉ , the counting result becomes 3, so the output signal 16
Set a to H level. In this case, however the time t ₆ the second detection signal 11A is input, in the time t ₅ to trampling detection signal 12a is input to first occurs after the first detection signal 7a is generated, the time t ₅ the time Since it is before t ₆ , the signal sequential detection means 17 has already output the second determination signal 17a that is at the H level at time t ₆ . Accordingly, since the time t ₉ the arithmetic unit 18 and the signal 16a and 17a are both H level is inputted, so that the signal 13a is output from the computing means 18 at this point. Since the counting means 16 operates as described above, the output signal 16
If a becomes H level, it cannot be determined whether the vehicle passing through the determination device 15 is a large multi-axle vehicle or a plurality of motorcycles that are translating and advancing in succession. As is apparent, the time when the second detection signal 11a is input to the signal sequence detection means 17 and the second detection signal 7
Before and after the time when the pedaling pressure detection signal 12a first generated after the occurrence of a is input to the detection means 17, it is opposite in the case of a large-sized multi-axle vehicle and the case of a translational / progressive motorcycle. , The signals 16a, 1 which are eventually input to the calculating means 18
The signal 13a output when both 7a are at H level indicates the presence of a plurality of motorcycles that are translating or advancing. That is, the discriminating device 15 can discriminate the translating or continuous motorcycle from the multi-axle large automobile based on the signal 13a. When a plurality of motorcycles are detected as described above, it is obvious that the number of motorcycles can be detected by counting the number of second detection signals 11a output in a pulse shape in advance. is there.

〔The invention's effect〕

As described above, in the present invention, the first light flux is formed in a curtain shape so as to be perpendicular to both the road surface of the vehicle passage and the traveling direction of the vehicle on the passage and to cross the vehicle passage. Then, when the first light flux is blocked, the first sensor that outputs the first detection signal and the first sensor so as to be within the curtain surface of the first light flux, or in the vicinity of this curtain surface and substantially parallel to the curtain surface. To form a beam-shaped second luminous flux, and further to output a second detection signal when the second luminous flux is blocked, and the above-mentioned second optical sensor provided almost directly below the first luminous flux. It is provided with a pedal pressure detection sensor, a signal processing unit that performs predetermined signal processing on the first and second detection signals and the pedal pressure detection signal output by the pedal pressure detection sensor, and the vehicle type determination of the vehicle based on the output signal of the signal processing unit. Configure the vehicle type identification device to perform This discriminating apparatus, the second light flux is so installed in the height can be blocked by operating vehicles riding on a motorcycle passing through the vehicle passage.

Therefore, in the vehicle type identification device having such a configuration, the motorcycle in which the front and rear are translated or continued with respect to the output time of the second detection signal and the output time of the pedaling pressure detection signal that is first output after the first detection signal is generated. Since the above case is the reverse of the case of a multi-axis large automobile, etc., the signal processing unit should be configured to extract both cases first, and further be configured to determine before and after both output times. According to the present invention,
There is an effect that it is possible to discriminate between a motorcycle that is translating or continuing based on an output signal from the signal processing unit and a multi-axis large vehicle.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of an embodiment of the present invention, and FIG.
FIG. 3 is a detailed configuration diagram of a main part in the figure, FIG. 3 is an operation explanatory diagram of the embodiment shown in FIG. 1, FIG. 3 (A) is a side view showing an example of a traveling state of an automobile, and FIG. FIG. 3 is a waveform explanatory view of an essential part in the embodiment shown in FIG. 1 ... Vehicle passage, 1a ... Road surface, 4 ... First light flux, 7
...... First optical sensor, 7a ...... First detection signal, 8 ...... Second
Luminous flux, 11 ... Second optical sensor, 11a ... Second detection signal, 12 ... Stepping pressure detection sensor, 12a ... Stepping pressure detection signal, 13 ... Signal processing unit, 15 ... Vehicle type discrimination device, 2
0,21 …… Motorcycles, 20a, 21a …… Driver,
P: vehicle traveling direction, H: height.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Uehara 1-1-1 Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Keizo Takeda Tanabe-Kawasaki, Kawasaki-shi, Kanagawa Nitta No. 1 in Fuji Electric Co., Ltd. (72) Inventor Riki Odajima No. 1 Tanabe Nitta in Kawasaki-ku, Kanagawa Prefecture Fuji Electric Co., Ltd.

Claims (2)

[Claims] 1. A first light flux is formed in a curtain shape so as to be substantially perpendicular to both the road surface of the vehicle passage and the traveling direction of the vehicle on the vehicle passage, and to cross the vehicle passage. Further, a first optical sensor that outputs a first detection signal when the first light flux is partially blocked, and a first optical sensor that is located within the curtain surface of the first light flux, or is located near the curtain surface. A second optical sensor that forms a beam-like second light beam so as to be substantially parallel to the first light beam, and outputs a second detection signal when the second light beam is blocked; A tread pressure detection sensor that outputs a tread pressure detection signal when the tread pressure on the road surface by the vehicle is detected; and a signal processing unit that performs predetermined signal processing on the first and second detection signals and the tread pressure detection signal. And an output signal of the signal processing unit Based on the vehicle type determination of the vehicle, the second light flux is installed at a height such that it can be blocked by a driver on the motorcycle on the road surface of the vehicle passage. Discriminator. 2. The discriminating apparatus according to claim 1, wherein the signal processing unit counts the number of pedaling pressure detection signals while the first detection signal is input, and the count result is 3 or more. And a counting means for outputting a first discrimination signal, and a signal for outputting a second discrimination signal when the pedaling pressure detection signal generated first after the generation of the first detection signal is inputted before the second detection signal. A vehicle type discriminating apparatus comprising: an order detecting unit; and a logical operation unit that outputs a third discriminating signal representing a plurality of motorcycles when the first discriminating signal and the second discriminating signal are input. .