JPH08147592A - Vehicle type detection device - Google Patents

Abstract

(57) [Abstract] [Object] The present invention can automatically move the collection unit of an automatic toll collection machine to the height of the window of the driver's seat regardless of the type of vehicle, and It is an object of the present invention to provide a vehicle type detection device that is suitable for a stand. [Structure] In a toll road toll collection system, a vehicle detector 1, a tread 4, a signal processing device 5, and a signal from the signal processing device 5 are used to automatically move the toll collection unit 7 to the height of the driver's seat window. The light-collecting side detector is provided with a toll collector 6 to be followed, and the light-emitter side detector includes a plurality of light-emitting portions of the transmissive photoelectric switches 2 and a plurality of reflective photoelectric switches 3 arranged in a row in the vertical direction and at equal intervals. The detector on the light receiving side is embedded in the detector on the opposite side to the detector on the vehicle side, and has a light receiving portion of the transmission type photoelectric switch 2, and the signal processing device 5 detects by the tread plate 4. The signal relating to the vehicle type factor of the vehicle and the signals from the transmission type photoelectric switch 2 and the reflection type photoelectric switch 3 are processed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toll collection machine for a toll collection system on a toll road.

[0002]

2. Description of the Related Art Generally, in a toll collection system on a highway or a toll road, a vehicle type detection device is provided to detect a passing vehicle. FIG. 9 is a schematic diagram showing an example of a conventional toll collection system on a toll road. In FIG. 9, the passing vehicle 36 advances along the vehicle approach path at the toll gate in the direction of the arrow. The optical vehicle detector is composed of a plurality of photoelectric switches, and includes an optical vehicle detector 31a on the light emitting side, and an optical vehicle detector 31b on the light receiving side which is installed to face the vehicle approach path. Further, there is a buried tread 33 on the road surface below the optical axis of the optical vehicle detector.

The above-mentioned optical vehicle detector detects that the vehicle 36 intercepts the optical screen stretched in the direction perpendicular to the road surface, and separates the vehicle, and the tread 33 serves as the number of axes during passage of the vehicle. The vehicle type is automatically determined by measuring the vehicle type determination factors such as the number of wheels, the tread, and the like.

The output signals from the vehicle detectors 31a and 31b and the tread 33 are processed by the processing device 37, and the automatic charge collection device 34 displays the charge according to the type of vehicle to automatically collect the charge. As shown in FIG. 9, the toll collection unit is fixedly provided in the upper and lower two stages, and is switched to the upper stage or the lower stage according to the vehicle type discrimination signal of a normal car, a large car, etc. to issue a toll ticket, or I was collecting fees.

[0005]

The collection unit of the conventional automatic toll collection machine is fixed to the upper and lower two stages as described above, and this height is determined by the vehicle type and either the upper or lower collection unit can be collected. I used to issue toll tickets or collect tolls from the unit, but the driver's seat of special vehicles, such as new large buses, is low, and the driver's seat of large vehicles is not always high. Absent. Therefore, with a fixed collection unit, the height of the driver's seat does not match the height of the collection unit, and it is inconvenient because the driver pays the toll or obtains a toll ticket in an unstable posture, and there is a problem in terms of safe driving. was there.

In order to solve the above-mentioned conventional problems, the present invention uses a transmission type photoelectric switch and a reflection type switch to utilize the light reflection characteristics of the glass of the vehicle type and the painted surface to determine the position of the window glass. That is, it is an object of the present invention to provide an automatic toll collection machine in which the collection unit automatically follows the height of the driver.

[0007]

A vehicle type detection device according to the present invention is a toll road toll collection system, comprising:
(A) A vehicle detector including a light emitting side detector and a light receiving side detector, (B) a tread embedded in a road surface below the optical axis of the vehicle detector, and (C) the vehicle detector. A signal processing device for inputting a signal from the tread, and (D) a toll collection device for automatically causing the collection unit to follow the height of the window of the driver's seat according to the signal logically discriminated by the signal processing device,
(E) The light-emitter side detector has a plurality of light-emitting portions of transmissive photoelectric switches and a plurality of reflective photoelectric switches having a light-receiving function and a light receiver in a row in the vertical direction and at equal intervals. (F) The light-receiving side detector is embedded so as to face the light-transmitting side detector with the vehicle approaching path in between, and has a light-receiving section that is paired with the light-emitting section of the transmissive photoelectric switch 2 (G). The signal processing device is characterized by processing signals relating to vehicle type factors such as the number of axles, the number of wheels, and the wheel distance of the vehicle detected by the treads, and signals from the transmission type photoelectric switch and the reflection type photoelectric switch.

[0008]

According to the present invention having such a configuration, the vehicle type can be determined by detecting the entry and size of the vehicle from the transmission type photoelectric switch of the vehicle detector and detecting the number of axles, the number of wheels, the tread, etc. by the treads. Can be determined.

Further, the reflection type photoelectric switch of the vehicle detector enables logical judgment based on the difference between the reflection characteristic of the paint on the vehicle body and the reflection characteristic of the window glass, and the reflection type photoelectric switch arranged at a constant interval in the height direction. From the position of the switch, the collection unit of the automatic toll collection machine can be automatically moved to the height of the window glass of the driver's seat.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention is shown in FIGS. 1 is a schematic diagram showing the first embodiment of the present invention, FIG. 2 is a diagram showing the structure of a reflective photoelectric switch, FIGS. 3 to 5 are detection principle diagrams of window glass, and FIGS. 6 to 7 are window glasses. FIG. 8 is a block diagram of a signal processing circuit of the vehicle detection device.

As shown in FIG. 1, the vehicle detector 1 comprises a light emitting portion 2a of a transmissive photoelectric switch and a light receiving portion 2b provided facing each other across a road. The transmissive photoelectric switch 2 is arranged in the height direction. A plurality of them are arranged at regular intervals.

A plurality of reflection type photoelectric switches 3 having both a light emitting function and a light receiving function are arranged on the light emitting portion side in parallel with the transmission type photoelectric switch 2a and are arranged at regular intervals in the height direction. Further, a tread 4 is provided on the road below the optical axis of the vehicle detector 1 provided facing each other.

The vehicle detector 1 detects that the passing vehicle 8 blocks an optical screen stretched in the direction perpendicular to the road surface.
The tread 4
Measures the vehicle type factors such as the number of axles, the number of wheels, and the tread while the passing vehicle 8 is passing, and automatically determines the vehicle type.

The position of the driver's seat window is detected by these information and the transmission type photoelectric switch provided in the vehicle detector 1, and the automatic toll collection unit is moved up and down to adjust the height of the driver's seat window. Let it set.

FIG. 2 is a structural diagram of a transmission type photoelectric switch.
The light from the infrared diode 10 passes through the light projecting lens 11 and is reflected by the reflecting object 15. 3 and 4 show the painted surface 2
0 and the difference in the reflection characteristics of the window glass, the light incident on the painted surface is diffused and reflected 19, but the light incident on the window glass 18 is reflected vertically without being diffused as shown in FIG.

The point of interest of the present invention is to determine whether the vehicle is a painted surface or a window glass by the presence or absence of light reception by the reflection type photoelectric switch 3 having both a light emitting function and a light receiving function. The reflective photoelectric switch 3 at a constant angle Δ
When the vehicle is installed so as to be inclined by θ, the painted surface 20 of the vehicle that undergoes the diffuse reflection 19 receives light, but the non-diffused reflected light 17 from the window glass 18 is not received by the reflective photoelectric switch.

Therefore, it is determined that the portion where the vehicle has entered and received the light by diffuse reflection is the painted surface of the vehicle, and the portion which does not receive the light is the window glass. FIG. 6 and FIG. 7 are explanatory views of the method of discriminating windows, showing changes in the light reception signals of the transmission type photoelectric switch 2 and the reflection type photoelectric switch 3 as the vehicle 8 passes, before the vehicle 8 enters. Is received by the light receiving side of the transmission type photoelectric switch 2, but is not received by the reflection type photoelectric switch 3 because there is no reflected light.

When the vehicle 8 enters, the transmission type photoelectric switch 2 does not receive light because the vehicle 8 blocks the optical axis, but the reflection type photoelectric switch 3 receives the coated portion of the vehicle body as described above and the window portion. Does not receive light.

The height of the window portion which does not receive light is such that a plurality of reflection type photoelectric switches 3 are arranged in advance in the height direction.
Can be detected from the position. FIG. 6 shows a transmission type photoelectric switch 2
And a signal of the reflection type photoelectric switch 3 is symbolized and displayed. The combination of these signals determines whether it is the paint portion of the vehicle body or the window glass.

FIG. 8 is a block diagram of the signal processing device 5.
The signal detected by the vehicle detector 1 and the signal from the tread 4 are discriminated by the logic discriminating unit 22 and the driving unit 23 moves the receiving unit 7 of the automatic toll collector 6 to the height of the window of the driver's seat.

When the window of the vehicle is open, light may pass therethrough, but there is light blocking by the occupant, and if the mesh of the photoelectric switch is made fine, the signals of the transmission type photoelectric switch and the reflection type photoelectric switch are signaled. It is possible to discriminate between the paint portion and the window glass by the distribution of.

[0022]

Since the present invention is constructed as described above, it has the following effects. (1) The collection unit of the automatic toll collection machine can be automatically moved to the height of the driver's seat regardless of the type of vehicle. (2) Since the collection unit is located at the height of the window of the driver's seat, the driver does not have to obtain a toll ticket or pay the fare in an unstable posture, which leads to safe driving. (3) Since only one receiving unit is required, the cost is low.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a structure of the reflective photoelectric switch shown in FIG.

FIG. 3 is a detection principle diagram of a window glass.

FIG. 4 is a detection principle diagram of a window glass.

FIG. 5 is a detection principle diagram of a window glass.

FIG. 6 is a logical explanatory diagram of a window discrimination method.

FIG. 7 is a logical explanatory diagram of a window discrimination method.

FIG. 8 is a block diagram of a signal processing circuit of the vehicle type detection device.

FIG. 9 is a schematic diagram showing an example of a conventional fee collection system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vehicle detector, 1a ... Light emitting side detector, 1b ... Light receiving side detector, 2 ... Transmissive photoelectric switch 2a ... Transmissive photoelectric switch (light emitting part), 2b ... Transmissive photoelectric switch (light receiving part), 3 ... Reflective photoelectric switch, 4 ... Treading board, 5 ... Signal processing device, 6 ... Automatic toll collection machine, 7 ... Collection unit, 8 ... Vehicle, 9 ... Driving circuit, 10 ... Infrared diode, 11 ... Projection lens, 12 ... Signal amplification circuit, 13 ... Photoelectric conversion element, 14 ... Light receiving lens, 15 ... Reflecting object, 16 ... Incident light, 17 ... Reflected light, 18 ... Window glass, 19 ... Diffuse reflection, 20 ... Painted surface, 21 ... Transmission and reflection No. 22: logic discriminating unit, 23 ... drive unit, 24 ... time division scanning unit, 31 ... optical vehicle detector, 31a ... optical vehicle detector (light emitting side), 31b ... optical vehicle detector ( Light receiving side), 32 ... Photoelectric sensor Itch, 33 ... tread, 34 ... automatic toll collection machine, 35 ... collection unit, 35a ... collection unit (upper stage), 35b ... collection unit (lower stage), 36 ... vehicle, 37 ... processing device.

Claims (1)

[Claims] 1. A toll road toll collection system, comprising: (A) a vehicle detector (1) comprising a light-emitter side detector (1a) and a light-receiver side detector (1b); and (B) the vehicle detection. A tread (4) buried in the road surface below the optical axis of the device (1), (C) a signal processing device (5) for inputting signals from the vehicle detector (1) and the tread (4), D) A toll collection device (6) that causes the collection unit (7) to automatically follow the height of the window of the driver's seat according to the signal logically determined by the signal processing device (5), (E) The above The light-emitter side detector (1a) includes a plurality of transmissive photoelectric switches (2) having light emitting portions (2a) and a plurality of reflective photoelectric switches (3) having a light receiving function and a light receiver, which are arranged in the vertical direction. And (F) the light-receiving-side detector (1b).
Is embedded so as to face the light emitting side detector (1a) with the vehicle approaching path in between, and is embedded in the light emitting part (2a) of the transmission type photoelectric switch (2).
(G) The signal processing device (5) has a pair of light receiving portions (2b) and a signal relating to vehicle type factors such as the number of axles, the number of wheels, and the wheel distance of the vehicle detected by the tread (4), and A vehicle type detection device characterized by processing signals from a transmissive photoelectric switch (2) and a reflective photoelectric switch (3).