JPH02272699A - Vehicle length discriminating device - Google Patents

Abstract

PURPOSE:To extract a light car by arranging plural light beams so that the rear end of the vehicle can be detected by a 1st vehicle detector and arranging one light beam so that the front end of the vehicle can be detected by a 2nd vehicle detector. CONSTITUTION:Plural light beams 4a are arranged in the 1st vehicle detector 3 starting to detect a vehicle at first so that the rear end of the vehicle can be detected and at least one light beam 19a is arranged in the 2nd vehicle detector 13 so that the front end of the vehicle can be detected. A binary signal corresponding to a result whether the length of an advancing vehicle crossing both virtual sections 2, 16 is longer or shorter than a prescribed distance between both the virtual sections 2, 16 is outputted from a decision part 15 as a decision signal 15a. The decision of the vehicle based on the length of the vehicle is executed as a binary by the decision signal 15a. Thus, a light car can be extracted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle length discriminating device used in a vehicle type discriminating device installed at a toll collection station on a toll motorway.

In particular, the present invention relates to a discrimination device that makes it possible to identify light vehicles.

[Conventional technology]

Figure 5 is a perspective view illustrating the configuration of a vehicle type discrimination device conventionally installed at the entrance toll collection station of a toll motorway.

(Refer to Japanese Utility Model Application Publication No. 60-250960) In the figure, l indicates a vehicle passageway along which a vehicle travels in the direction of the arrow P to enter the vehicle passageway of a toll motorway, and 2 indicates a vehicle passageway at a predetermined point on the vehicle passageway 1. A virtual cross-section 3 assumed to intersect approximately perpendicularly to the traveling direction P detects a vehicle crossing the cross-section 2 depending on whether or not the light beam 4a disposed within the cross-section z is blocked, and generates a corresponding detection signal 3a based on the detection result. In this case, it is a vehicle detection device that outputs.

The light beam 4a is connected to a plurality of beams l1i parallel to the road surface of the traffic route l.
This signal 3a is configured by I-shaped unit light beams, and when at least one of the unit light beams is blocked, a detection signal 3a indicating that the light beam 4a is blocked is output. It is possible to detect whether all vehicles traveling on road 1 have entered cross section 2, and also to detect whether the rear end of the vehicle that has entered cross section 1ii2 has passed through cross section 2. The vehicle detection device 3 is configured as follows. Reference numeral 4 indicates a light projecting section of the vehicle detection device 3 that emits the light beam 4a, and 5 indicates a light receiving section of the detection device f#3 that receives the light beam 4a.

6 has cross section 2 and is a traffic route! A light beam 7a consisting of a plurality of parallel linear unit light beams rIfIVc
A light projecting section 7 that emits the light beam 7a and a light receiving section 8 that receives the light beam 7a.
A vehicle height detection device 9 outputs a vehicle height signal 6a corresponding to the height of the vehicle blocking the light beam 7a from the light receiving section 8;
The road surface of the traffic route 1 is designed to detect the pedal pressure exerted on the road surface of the vehicle and output the axle No. 41 9a according to the number of wheel axles, the number of wheels, the OL condition of the vehicle, such as the tread. The axle sensor 10 is built in the automatic ticket issuing machine 11 installed on one side of the island ta, 1a formed by expansion of 10 vehicles on the vehicle passageway, and detects the detection signal 3a, the vehicle height signal 6a, and the axle wheel. This is a signal processing section configured to receive the signal 9a. Here, the signal processing unit 10 outputs signals 3a and 6a.
and 9a are input, the system is configured to perform predetermined signal processing on these input signals and output a vehicle type discrimination signal tOa corresponding to the vehicle type of the vehicle that crossed the virtual WT 2, and also to automatically issue a ticket. When the signal processing unit 10 outputs the discrimination signal 108, the machine 11 automatically issues a toll ticket corresponding to the vehicle type provided at the automatic ticket issuing machine 11 and corresponding to the vehicle type indicated by the discrimination signal tOa. Reference numeral 12 denotes a vehicle type discriminating device that is configured to issue bids at a fixed price.

[Line ends that the invention attempts to solve]

The vehicle type discrimination device 12 is configured as described above, but furthermore, in this discrimination device ft12, the signal processing unit 10 performs signal processing on the input signals 3a, 6a+qa described above. Regular cars and large cars according to the fee structure.

Now outputs the vehicle type discrimination signal tOa according to the vehicle type classification such as oversized cars'! sa, and in this case, ordinary cars according to the vehicle classification include motorcycles, small cars, ordinary passenger cars, ordinary freight cars, and microbuses according to the vehicle classification stipulated by law. However, the system is structured so that it is not possible to distinguish between motorcycles and light vehicles, for which there is a strong social demand for a separate fee from the toll road usage fee for cars.

The method of extracting motorcycles from ordinary cars discriminated by the vehicle type discrimination device 12 without changing the configuration of the detection devices 3, 6, and 9 has already been disclosed in Japanese Patent Laid-Open No. 62-1 filed by the present applicant.
Means described in Publication No. 96799 and Utility Model Application Publication No. 16659/1986
Since i=J function by the means described in Publication No. 9, if it is possible to further extract whispering cars using detection devices 3, 6, and 9, it is possible to identify the type of car that satisfies the above-mentioned social demands. S-manufacturing of the device becomes possible.

However, among the above-mentioned six vehicle types included in regular cars, one of the external characteristics that distinguishes them from light cars is the length of the vehicle, which is 3.2 [m] or less as stipulated by the Road Transport Vehicle Law Enforcement Regulations. Therefore, the vehicle length of a light vehicle is 3.2[:
m] and below, based on the following external characteristics.

Although this discrimination result includes motorcycles with a vehicle length of 3.2 cm or less, by using the known motorcycle discrimination means applied by the applicant mentioned above, Although it is possible to correctly extract only light vehicles, the above-mentioned discrimination device 12
The above-mentioned signal 3 obtained at one section 2 of the vehicle traffic route l
s to perform the discrimination operation using only a, 6a + 9a.
Since the vehicle length detection function is not provided, this discriminator 12 does not have the ability to extract light vehicles.
T-Noh play. There is a problem in that it is not possible to identify the vehicle type based on the length of the vehicle.

An object of the present invention is to enable vehicle type discrimination based on the length of the vehicle by providing means for detecting the length of the vehicle, in order to configure a vehicle type discrimination device capable of extracting, for example, a light vehicle. It is possible to obtain a vehicle length discriminating device that can perform the following steps.

Means for Solving Section C] In order to achieve the above object, according to the present invention, two sets are installed at a predetermined pressure M in the direction of movement of vehicles moving on a vehicle traffic route, and First and second vehicle detection devices that detect the vehicle crossing the virtual cross section based on whether or not a light beam disposed within the virtual cross section substantially perpendicular to the direction is blocked, and output a detection signal according to the detection result. with equipment.

The detection signals output from each of the vehicle detection devices are input together, and these two input signals are used to detect the vehicle.
and a discriminating unit that performs a discriminant calculation to binary-discriminate the length of the vehicle and outputs a discriminating signal according to the result, and the first vehicle detecting device starts detecting the vehicle first, at the rear end of the vehicle. a plurality of the light beams are arranged so as to detect the front end of the vehicle, and at least one of the light beams is arranged so as to detect the front end of the vehicle in the second vehicle detection device. Configure.

[Effect]

With the above configuration, the discriminator outputs a binary signal as a discrimination signal depending on whether the length of the vehicle traveling across the one-car temporary cross section is longer or shorter than the predetermined distance between the two temporary cross sections. Therefore, this discrimination signal can be used to discriminate the vehicle type based on the length of the vehicle in a binary manner.

This vehicle length discriminating device may be used, for example, as the above-mentioned vehicle type discriminating device fJ.
When used in conjunction with l 12, the vehicle length is e.g. 3.2cm
) It is possible to configure a vehicle type discriminating device that can discriminate the following ordinary cars and therefore extract light automobiles.

Then, with the above configuration, even if the second vehicle detection device is provided with, for example, one light beam, this light beam can be directed in the vertical direction within a virtual cross section perpendicular to the direction of travel of the vehicle. By arranging the light vehicle diagonally to the ground, the second vehicle detection device detects the front end of a light vehicle whose front end is located on the front bumper and which is mounted at a relatively low height from the ground. Since the vehicle length determination device can be reliably detected, the vehicle length discriminating device can be manufactured economically. [Embodiment] FIG.
The difference from FIG. 5 in this figure is that the second vehicle detection device 13 whose detailed configuration is shown in FIG. 14
(II!!K) and the vehicle detection device f
Detection signals 3a and 1 output by i3 and 13, respectively
3a and 13b are both inputted, and a discriminator 15 is provided in the ticket issuing machine 14, which performs an operation described later. Then.

In this case, the vehicle detection device 13 is newly virtualized at a position on the vehicle traffic route 1 that is a predetermined distance away from the virtual cross section 2 .

A light beam 17 arranged in a virtual cross section 16 parallel to the cross section 2
A, a vehicle crossing the cross section 16 is detected depending on the presence or absence of light shielding of 19a, and the above-mentioned detection signal 1 is generated according to the detection result.
3a, 131), in which case the light beam t7al 19a is formed as shown in FIG.

That is, in FIG. 2, FIG. 2A is a front view of the detection device 13 viewed from the direction of arrow P in FIG.

(B) The figure is a view of the detection device [13 as seen from the direction of arrow Q shown in the figure, 17 is a light projector that emits a linear light beam 7a, and 1B is a light beam. A light receiving section receives the light L7a and outputs the above-mentioned detection signal 13a according to the result of the light reception; 19 is a light projecting section that emits a single linear light beam 19a; 20 is a light projecting section that receives the light beam 19; This is a light receiving section that outputs the above-mentioned detection signal 13b in accordance with the result of this light reception. Then, these light emitting section 17.19 and light receiving section 18.2
0 is.

All of the beams 17a and 1gB are fixed to pillars 21 and 22 installed on the islands la and la so that the light beams 17a and 1gB travel obliquely upward within the virtual cross section 16. Here, the light projecting section 17.19 and the light receiving section 18.20 are arranged so that the light beam 178.19a both travels diagonally upward.
This is to prevent light from entering the light receiving section and causing a burnout accident or the like. 23 is a light projecting section 17 and a light receiving section 1
8, 24 is a photoelectric detection device consisting of a light projecting section 19 and a light receiving section 20, and the RL double detection device 13 is composed of both photoelectric detection devices 23, 24 and columns 21 and 22. . Detection device! The reason why two sets of photoelectric detection devices 23 and 24 are installed in 3 is to improve the reliability of the detection device jtl 3 in case the detection devices 23 and 24 lose their functions due to vehicle exhaust gas, mud splashed by the vehicle, etc. In order to achieve this, the detection device 13 may be provided with only one of the photoelectric detection devices @23 and 24.

In FIG. 1, each part is configured as described above, and furthermore, the detection signals 3a, l as binary signals are
3 a, t 3bl! l; is configured to be at H level when the corresponding light beam is in a light-transmitting state and to be at L level when the corresponding light beam is in a light-blocking state;
Moreover, by installing the vehicle detection device ft13 as described later, the light beam 178.19aI! It is configured so that it can be shielded from light by the front bumper of the light vehicle, which forms the front end of the light vehicle that crosses the imaginary cross section 16. And then, more.

A determining unit 15 to which the signals 3a, 13a, and 13b are input,
After the time-lapse badan shown in FIG. 3(A), that is, the signal 3a first changes from the H level to the L level and then returns to the H level again, the signals 13a and 13b start to change from the H level to the L level. Signal 3a, with a temporal pattern of
13a and 13b are input to the discriminator 15, or the signal 13a is inputted to the discriminator 15, or the time pattern shown in FIG. , 13b (signal 3a+ with a time pattern in which one changes from H level to L level)
13a and 13b are input to the determining unit 15.

The vehicle detection device 3 is configured to output a discrimination signal 15a as a binary signal, and as described above, the nine vehicle detection device 3 is configured to be able to detect the rear end of a vehicle crossing the cross section 2. Therefore, in this case, the 1 discriminator 15 passes through both virtual cross sections 2 and 16. Front end bt light beam t7a*
A determination signal 1511 is output by binary-discriminating whether the length of the vehicle configured to block light at t9a is shorter or longer than the distance between the two cross-sections. In FIG. 1, the distance is set to (3300±20) Cm). In addition, in FIG. 1, 25 is the vehicle detection device 3 and 1.
This is a vehicle length discriminating device consisting of a vehicle length discriminator 3 and a discriminator 15.

In FIG. 1, since the vehicle length discriminator 25 is configured as described above, one discriminating signal tSa is used to distinguish between all groups of vehicles passing through both tentative intersection sections 2.16, automobiles, and most motorcycles. Extract all at once l!l-
Moreover, in this case, D=3300±20C], so the probability that the above-mentioned extraction result based on the signal 15a includes ordinary cars other than light cars and motorcycles is very small. In other words.

In this case, single-unit discrimination will be performed based on the length of the vehicle. Therefore, light vehicles can be extracted by using the 1 discrimination signal 15a, the output signal tOa of the signal processing unit 10 that can extract ordinary vehicles from vehicles passing through the virtual cross section 2, and the discrimination result by the motorcycle discrimination means described above. It is clear that a vehicle type discriminating device that can perform the following steps can be obtained.

FIG. 4 shows a photoelectric detection device W attached to the vehicle detection device 13 mentioned above.
1 is an explanatory diagram of the installation mode of 123.

A is the emission point of the light beam 1711 of the light projector 17, B is the incident point of the light beam 178 of the light receiver 18, C is the width of the vehicle traffic path l, and 6B is the vehicle traffic on the upper edge of the front bumper of various light vehicles. The minimum height of road 1 from the road surface.

F is the maximum height of the lower front bumper of various light vehicles from the road surface of the vehicle traffic route l. Also.

G is the maximum distance between the left end of the bumper 26 and the left end of the road 1 when the upper part of the front bumper of the light vehicle is at a height of E from the road surface of the road 1; The lower edge b1 of the front bumper is the minimum value of the distance between the right end of the bumper 27 at a height F from the road surface of the road l and the left end of the road l.

Therefore, as shown in Figure 1, if the photoelectric detection device 23 is set so that the light beam 17a passes through the upper left vertex J of the bumper 26 and the lower right vertex of the bumper 27, the front bumper of all light vehicles will be illuminated. It is clear that it can be detected with a beam of 17 m, and the width C of 6 traffic lanes is C = 3 Cm according to regulations.
), and according to the research results of the present inventors, E=430C amount 11. F=480[:+w), G=
800 (:w), I=1600 C-], so if the photoelectric detection device 23 is set so that the light beam 17a becomes IK as shown in the figure, the light beam 17a becomes Let the distance M between the vertical line taken down and the left end of the traffic route l be 400Cs+), and the above-mentioned plane 28
The distance f between the perpendicular line drawn from point B and the right end of traffic route 1
If iN is the same (400C), the plane 28 of point A
The height X with respect to the plane 28 is 355 [■], and the height Y of the point B with respect to the plane 28 is 592.5Cw). That is, in FIG. 1, the photoelectric detection bag #23 is configured so that the light beam 17a passes through the five points shown in FIG. Since the photoelectric detection device 24 is arranged in a configuration 11 that is symmetrical to the light beam 17a with respect to the equal dividing line, both light beams 17a and 17a are arranged as long as each of the functions of the two detection devices 23 and 24 is in good condition. This means that the front ends of all light vehicles can be detected using either a+19a.

In the above-mentioned embodiment, two light beams 17a and 19a were provided to cross each other in the vehicle detection device 13, but in the present invention, the light beam in the detection device 13 is either VC, 17a or 191 as described above. Only one light beam may be used, or the detection device 13 may be provided with a plurality of light beams that do not intersect. In addition, in the above-mentioned embodiment, it was assumed that D-3300±20 Cm), but the present invention is not limited to such a value, and the present invention also applies to the above-mentioned method for extracting light vehicles. It can also be applied to uses other than vehicle type identification devices.

〔Effect of the invention〕

As described above, in the present invention, two sets of light beams are installed at a predetermined distance apart in the direction of travel of a vehicle traveling on a vehicle traffic route, and each set is arranged within a virtual cross section substantially perpendicular to the direction of travel. A detection signal O outputted by each of the first and second vehicle detection devices and the one-vehicle vehicle detection equipment each configured to detect a vehicle crossing the virtual cross section depending on the presence or absence of a blockage and output a detection signal according to the detection result. ″- both entered.

and a discrimination unit that performs a discrimination calculation to binary-discriminate the length of the vehicle using both of these input signals and outputs a discrimination signal according to the result, and a first detection unit that starts detecting the vehicle first. In the vehicle detection device, multiple light beams are arranged to detect the rear end of the vehicle.

In addition, the vehicle length determination device is configured such that the second vehicle detection device has at least one light beam arranged to detect the front end of the vehicle.

Therefore, with the above configuration, a binary signal corresponding to whether the length of a vehicle traveling across one virtual cross section is longer or shorter than a predetermined distance between the two virtual cross sections is outputted from the discriminating section as a discriminating signal. Therefore, this discrimination signal can be used to perform the vehicle 1 discrimination based on the length of the vehicle in a binary manner.1 The present invention uses this vehicle length discrimination device as, for example, the above-mentioned vehicle type discrimination device 12. When used in combination with the above, it is possible to discriminate ordinary cars whose vehicle length is, for example, 3.2 cm) or less, and thus it is possible to construct a vehicle type discriminating device capable of extracting light automobiles.

Then, with the above configuration, even if the second vehicle detection device is provided with, for example, one light beam, this light beam is directed vertically within a virtual cross section perpendicular to the traveling direction of the vehicle. By arranging it diagonally, the second vehicle detection device can reliably detect the front end of a light vehicle whose front end is located on the front bumper and which is mounted at a relatively low height a from the ground. Since the vehicle length determination device can be detected, the present invention also has the effect that the vehicle length determination device can be manufactured economically.

[Brief explanation of drawings]

FIG. 1 is a perspective view illustrating the configuration of a set of embodiments of the present invention, FIG. 2 (A) is a front view of the second vehicle detection device shown in FIG. 1, and FIG. Q arrow view in figure (A), 3rd
3(A) and 3(B) are explanatory diagrams of different waveform states of the signals of the essential parts in FIG. 1, and FIG. 4 is an explanatory diagram of the arrangement of the essential parts in FIG. 2(A). FIG. 5 is a perspective view illustrating the configuration of a conventional vehicle type identification platform. l...Vehicle traffic route, 2.16...Virtual cross section, 3.13...Vehicle detection device, 33.13
a, 13b...Detection signal. 4al 7a, 17a, 19a... light beam,
! 5...Discrimination section. 15a...Discrimination signal, 25...Vehicle length discrimination device. P... Vehicle traveling direction, D... Distance between both virtual cross sections. α (,Q) Notebook map

Claims (1)

[Claims] 1) Two sets of light beams are installed at a predetermined distance apart in the direction of travel of a vehicle traveling on a vehicle traffic route, and each set is placed within a virtual cross section substantially perpendicular to the direction of travel. The detection signals output from each of the first and second vehicle detection devices configured to detect the vehicle crossing the cross section and output a detection signal according to the detection result and the two vehicle detection equipment are input together. , and a discrimination unit that performs a discrimination calculation to binary-valuely discriminate the length of the vehicle using both of these input signals and outputs a discrimination signal according to the result, and starts detecting the vehicle first. In the first vehicle detection device, a plurality of the light beams are arranged to detect the rear end of the vehicle, and in the second vehicle detection device, at least one of the light beams is arranged to detect the front end of the vehicle. A vehicle length determination device characterized in that: is arranged.