KR20130097849A - Vehicles classification apparatus of noncontacting type - Google Patents

Abstract

PURPOSE: A non-contact type vehicle classification device improves the detection accuracy of vehicle information by sensing the passage of a vehicle by optical sensors installed on the bottom of detection pieces. CONSTITUTION: The top of a frame (5) is pressurized by a vehicle wheel and the bottom includes an insertion groove (52) opened in a longitudinal direction. Sensor modules (8,8') are made up of multiple detection pieces, cut-off parts, and optical sensors. The detection pieces control the cut-off parts to block the propagation of an optical signal when the detection pieces are bent downward and are inserted into the insertion groove of the top frame. A support plate (3) is arranged on the bottom of the sensor modules. A control unit determines that the detection pieces are bent when the value of an optical signal received is less than a predetermined value.

Description

Vehicle classification apparatus of noncontact type

The present invention relates to a non-contact type vehicle classification apparatus, and in particular, it is possible to use the parts semi-permanently by using a non-contact optical sensor as well as an optical sensor in the lower portion of each of the sensing pieces formed of a plurality of elastic plates arranged in a line The present invention relates to a vehicle detecting apparatus having a vehicle width and lubrication, wheelbase, and number of vehicle types detected by detecting a vehicle passage.

Due to the development of the automobile industry and the increase in the demand for vehicles, traffic congestion is frequently caused by traffic congestion on various parts of the road, which can lead to enormous social losses such as waste of time, environmental pollution, and fuel consumption. Therefore, the efficient management of the road is urgent.

In particular, a researcher on Intelligent Transport System (ITS) that collects information on vehicles driving on the road and generates traffic information using collected vehicle information and provides them to control centers, base stations and in-vehicle terminals It is being applied and applied. In general, such an intelligent traffic system embeds a vehicle detection device and a vehicle classifier on a road to generate traffic information by using a detection signal according to a traffic passage. That is, since the detection rate of the vehicle detecting device and the vehicle classifier in the intelligent transportation system takes a large part to the performance of the system, various studies have been conducted to increase the detection rate of the vehicle detection and the vehicle classification and to reduce the error occurrence rate.

Patent No. 10-051772 by the applicant of the present invention (name of the invention: a non-contact vehicle detection device) has a long life by detecting a vehicle using a non-contact optical sensor, non-contact vehicle detection device that has a high detection rate and processing speed The configuration of the

1 is a perspective view of a vehicle detecting apparatus disclosed in Korean Patent No. 10-051772 (name of the invention: a contactless vehicle detecting apparatus).

The vehicle detecting apparatus (hereinafter, referred to as a related art) 100 of FIG. 1 has an outer housing in which an upper surface is pressed against a vehicle wheel, and an inner housing insertion groove 111 is formed in a longitudinal direction with an opening downward in a lower surface thereof. 101, the inner housing 103 is inserted into the insertion groove 111 of the outer housing 101, the sensing plate 131 and the optical sensor 133 to be described later therein, and the installation groove of the road The base plate 105 is installed on the bottom surface of the outer housing 101 and the inner housing 103 is installed on the upper surface.

In addition, the inner housing 103 is installed on the sensing plates 131 which are formed so that a plurality of sensing pieces that are curved by pressing the upper surface of the outer housing 101 in the longitudinal direction, and directly below the sensing plates 131. Consisting of the optical sensors 133.

In addition, although not shown in FIG. 1, the vehicle detecting apparatus 100 is emitted from the optical sensor 105, reflected by the sensing piece of the sensing plate 131, and then received by the optical sensor 133 (hereinafter, referred to as a time flight). And a control unit (not shown) for determining that the sensing plate 131 is curved when the time flight) is shorter than the preset time.

That is, in the conventional vehicle detecting apparatus 100, when the upper surface of the outer housing 101 and the sensing piece of the sensing plate 131 are bent downward due to the pressurization of the vehicle wheel according to the passage of the vehicle, the control unit presets a time flight value. If the time flight value is less than the preset value, it is determined that the vehicle has passed.

In addition, in the conventional vehicle detecting apparatus 100, the sensing plates 131 are installed in four rows in the width direction of the inner housing 103 so that the outer two rows of the four rows are used to detect the wheel width, and the inner two rows of the vehicle speed may be used. By using it for calculation, the detection rate and processing speed are increased.

In addition, the conventional vehicle detecting apparatus 100 is formed of an elastic plate having an elastic force, and the sensing plate 131 is pressurized to the vehicle wheel because the sensing pieces which are independently curved according to the pressurization of the vehicle wheel are provided. The sensing piece can be accurately detected.

However, in the conventional vehicle detecting apparatus 100, since the sensing plate 131 is integrally manufactured with one elastic plate, when the vehicle passes, only the sensing piece directly below the vehicle wheel is curved downward, but directly below the vehicle wheel. By bending downward to the sensing pieces adjacent to the sensing piece of the problem occurs that the detection rate is lowered.

In addition, the conventional vehicle detecting apparatus 100 is not only difficult to determine whether the vehicle passes through the time flight value since the curved portion of the actual sensing piece is very small when the sensing piece is bent downward according to the traffic of the vehicle. The error rate increases.

In addition, the conventional vehicle detection apparatus 100 calculates the time flight values of the plurality of light sensors 133 in real time in order to detect whether the sensing pieces are curved in real time, and the predetermined time for the calculated time flight values. Computation process is compared, so the operation process is complicated.

In addition, the conventional vehicle detection apparatus 100 has a problem that the manufacturing cost increases because a plurality of expensive optical sensors are installed in four rows.

The present invention is to solve this problem, the problem of the present invention is that the plurality of sensing pieces formed of an elastic plate having an elastic force is formed to be aligned in the longitudinal direction of the inner housing so that the vehicle directly underneath when the vehicle passes through It is to provide a vehicle type classification apparatus in which only the sensing pieces of the pressure is lowered to increase the vehicle information detection rate.

In addition, another problem of the present invention is that the sensor modules are installed in four rows in the width direction of the sensor modules are arranged in a row in the sensing pieces, the outer two rows detect the vehicle speed, the number of shafts and the direction of travel, the inner two columns to the wheel width and lubrication The processing area that can be utilized by sensing is enlarged and subdivided so that it can be detected in two rows, and the operation area is reduced to provide a vehicle type classification device having excellent processing speed and detection accuracy.

In addition, another problem of the present invention is that the two rows of modules for detecting the vehicle speed, the number of axes and the direction of travel do not need accurate position information of the wheels of the vehicle. And the number of sensing pieces are reduced to provide a vehicle classifier having a low manufacturing cost.

In addition, another problem of the present invention is to accurately detect whether the vehicle passes because the blocking unit installed under the sensing plate moves downward to block the movement of the optical signal of the optical sensor when the vehicle passes.

The solution means of the present invention for solving the above problems is the upper surface is pressed to the vehicle wheel, the frame is formed with an insertion groove opening in the longitudinal direction on the lower surface; A plurality of sensing pieces formed of an elastic plate having an elastic force and bent downward by the pressing of the upper surface of the frame and aligned in the longitudinal direction, blocking portions provided on the lower surfaces of the sensing pieces, and the sensing pieces Each sensor unit is disposed below each sensing piece and is provided with optical sensors for transmitting and receiving an optical signal, and the sensing pieces block the movement of the optical signal when the sensing pieces are bent downward. Sensor modules are configured to be inserted into the insertion groove of the upper frame; A support plate disposed under the sensor modules; And a control unit that determines that the sensing piece is curved when the optical signal received value received by the optical sensor is less than a preset value TH.

In addition, in the present invention, the control unit may determine the vehicle type of the vehicle by calculating the speed, wheel width, leap and wheelbase of the vehicle based on the optical signal reception values detected by the sensor modules and comparing the previously stored vehicle model data. .

In the present invention, the optical sensor is composed of a transmitter for emitting the optical signal, and a receiver for receiving the optical signal emitted from the transmitter, the transmitter and the receiver are spaced apart from each other so as to face the sensing piece downward It is preferable that the cut-off part is inserted between the transmitting part and the receiving part when it is curved.

In addition, in the present invention, the vehicle classifier is formed of an elastic plate having an elastic force so that when the vehicle passes through the sensing plate which is bent downward the area pressed on the vehicle wheel, and formed of a conductor from the lower surface of the sensing plate A switch module comprising spaced contact parts installed to be spaced apart from each other and contacting the contact part disposed under the curved sensing plate and the sensing plate when the sensing plate is curved to output an 'On' signal; A signal cable connection part to which a signal cable is connected to supply a signal to the switch modules from the outside; Further comprising a signal processing unit for processing the on / off (On / Off) signal of the switch modules, the sensor modules and the switch modules are installed to be aligned in four rows, the sensor modules are installed in two rows in the inner two columns, The switch modules are installed in the outer two columns, and the control unit detects the wheel width and roundness of the passing vehicle through signals input from the sensor modules, and the speed of the passing vehicle through signals input from the switch modules. It is desirable to detect wheelbase and travel direction.

According to the present invention having the above-mentioned problems and solving means, a plurality of sensing pieces formed of an elastic plate having an elastic force detects the vehicle, so that the sensing piece installed under the vehicle wheel is curved downward to block the movement of the optical signal. It is possible to accurately detect the movement position, thereby accurately detecting the rim, wheel width, vehicle type and vehicle speed.

In addition, according to the present invention, the modules are installed in four rows so that the outer two rows detect the vehicle speed, the lubrication and the direction of travel, and the inner two rows detect the lubrication width and the rim. Accuracy is improved by selecting only the optimized signal, and the operation is effective even if one of the four rows is lost, thereby improving the reliability and accuracy of the equipment.

In addition, according to the present invention, since the modules installed in the outer two rows are configured as a switch module, the manufacturing cost is reduced.

In addition, according to the present invention, by replacing the two modules of the outer two rows that detect the vehicle speed, the rolling and the direction of travel with a switch module that detects only the vehicle traffic, the number of expensive optical sensors and the sensing pieces is reduced, thereby reducing the manufacturing cost.

In addition, according to the present invention, since the amount of light signal received is determined according to the degree of curvature of the sensing piece according to the traffic, it is possible to accurately determine whether the vehicle passes.

1 is a perspective view of a vehicle detecting apparatus disclosed in Korean Patent No. 10-051772 (name of the invention: a contactless vehicle detecting apparatus).
Figure 2 is an assembled perspective view showing a non-contact type of vehicle classification apparatus according to an embodiment of the present invention.
3 is a perspective view of FIG.
4 is a cross-sectional view taken along the line A-A 'in Fig.
5 is a perspective view illustrating the sensor module of FIG. 2.
Fig. 6 is a sectional view of Fig. 5. Fig.
7 is a side view illustrating the optical sensor of FIG. 5.
8 is an exemplary diagram for describing an operation of an optical sensor.
9 is a perspective view illustrating the switch module of FIG. 2.
10 is a cross-sectional view of FIG. 9.
11 is a block diagram showing a controller applied to the present invention.

Hereinafter, with reference to the accompanying drawings will be described.

2 is an assembled perspective view showing a non-contact type vehicle classification apparatus according to an embodiment of the present invention, FIG. 3 is a perspective view of FIG. 2, and FIG. 4 is a cross-sectional view taken along line AA ′ of FIG. 3.

The non-contact vehicle classifier 1 of FIGS. 3 to 5 is formed of a plate having a length, and includes a support plate 3 installed on a bottom surface of an installation groove of a road, and an opening groove 52 opened in a longitudinal direction on a bottom surface thereof. The frame 5 is installed on the upper surface of the inner housing 7 which will be described later, and the sensor modules 8, 8 'and switch modules 9, 9' are installed therein. The inner housing 7 is inserted into the opening groove 52 and coupled to the upper surface of the support plate 3.

Support plate 3 is installed on the bottom surface of the installation groove (not shown) pre-installed on the road, it is formed in a plate shape having a length.

In addition, the frame 5 and the inner housing 7 are bolted to the upper surface of the support plate (3).

The frame 5 has a length of the housing 51, an opening groove 52 having a lengthwise opening at the bottom of the housing 51, and protrudes outwardly from the upper surface of the housing 51 to be continuous in the longitudinal direction. It consists of protruding protrusions 54, 55, 56, and 57.

In addition, when the vehicle passes, the frame 5 presses the protrusions 54, 55, 56, and 57 so that the lower portion of the protrusions 54, 55, 56, and 57 is applied. The sensing pieces 81 of FIG. 5 and the sensing plate 91 of FIG. 9, which will be described later, are bent downward, and when the vehicle wheel passes, the pressure is removed to detect the sensing piece 81 and the sensing plate 91. ) Restores its reputation.

In addition, the opening groove 52 is configured to be opened by extending to the longitudinal cross sections.

In addition, the frame 5 is bolted to the inner housing 7 when the inner housing 7 is inserted and seated into the opening groove 52 of the housing 51.

In addition, the signal cable connecting portion 6 for supplying a signal supplied from the outside to the switch module 9, 9 'which will be described later is formed on one side of the housing 51. In this case, the signal cable connection part 6 is installed on one side of the frame 5 in FIGS. 2 and 3, but it may be configured on the support plate 3 and the inner housing 7.

The inner housing 7 has a base plate 71 formed in a plate shape having a length, and a protrusion catching portion 73 protruding from the upper surface of the base plate 71 so as to be spaced apart from one end portion in the longitudinal direction of the base plate 71. ), Two sensor modules (8) and (8 ') and two switch modules (9) and (9') which are arranged on the upper surface of the base plate (71) so as to be arranged in four rows in the width direction. At this time, the sensor modules 8 and 8 'are installed adjacent to the inside, and the switch modules 9 and 9' are installed to be spaced apart from each other.

In this case, the modules 7, 7 ′, 8, and 8 ′ are supported by one end of the engaging protrusion 73 when installed on the upper surface of the base plate 71, and the other end of the support plate 71. It is installed to be integrally connected to the other end surface of the.

In addition, the modules (7), (7 '), (8), (8') are installed on the top surface of the base plate 71 in four rows in the width direction in the energetic direction, the base plate 71 is opposite one side in the longitudinal direction It is coupled to the upper surface of the base plate 71 so that the other end portion is adjacent to the other end surface of the base plate 71 facing away from one end surface of the. Accordingly, the non-contact vehicle classifier 1 according to the embodiment of the present invention may be continuously installed on other parts according to the length of the installation groove of the road, and the vehicle may be detected even if the vehicle passes over the areas to which the parts are connected. It becomes possible.

The inner housing 7 also allows the modules 7, 7 ′, 8, and 8 ′, which project upwardly from the base plate 71, to be inserted into the opening grooves 52 and then to the frame 5. And it is bolted to the support plate (3).

5 is a perspective view illustrating the sensor module of FIG. 2, and FIG. 6 is a cross-sectional view of FIG. 5.

5 and 6, the sensor module (8), (8 ') has a length but the housing 82 is formed with a receiving groove 83 therein, and the receiving groove 83 of the housing 82 made of a PCB or aluminum plate A plurality of substrates 85 installed inside the substrate 85, an optical sensor 86 seated on the upper portion of the substrate 85, and an elastic plate having an elastic force and installed in the longitudinal direction on the upper portion of the enclosure 82. Two sensing pieces 81 and a blocking unit 90 installed vertically under each of the sensing pieces 81.

In addition, it is preferable that an insulator 89 is provided on the sensing pieces 81 to protect the sensing pieces 81.

The enclosure 82 is formed in the shape of a rod having a length, the receiving groove 83 is formed continuously in the longitudinal direction from the upper surface to the lower center, and inclined downward toward the receiving groove 83 from both sides in the longitudinal direction of the upper surface The inclined surfaces 88, 89 are formed, and both sides of the sensing pieces 81 are mounted on both sides of the upper surface.

In addition, the sensing pieces 81 are formed of a leaf spring having an elastic force to bend downward when the vehicle passes, and to restore to a flat state when the pressure is released.

In addition, the sensor modules 8 and 8 ′ are connected to the vehicle wheels through which the sensing pieces 81 are integrally connected to the protrusions 55 and 56 of the frame 5 when coupled to the frame 5. The sensing pieces 81 provided below the protrusions 55 and 56 pressed by the curved portions are bent downward.

In addition, a lower portion of the accommodating groove 83 of the housing 82 is formed with a substrate insertion groove into which the substrate 85 is inserted in the longitudinal direction, and an optical sensor 86 is formed in the accommodating groove 83 on the upper surface of the substrate 85. It is installed to be located.

7 is a side view illustrating the optical sensor of FIG. 5, and FIG. 8 is an exemplary diagram for describing an operation of the optical sensor.

As shown in FIG. 7, the optical sensor 86 is vertically installed on the upper surface of the substrate 85, and at the upper end thereof, a transmitter 861 for emitting the optical signal 50 and a receiver 863 for receiving the optical signal are provided. Protrudingly spaced apart from each other.

In addition, the reception unit 863 receives an optical signal of a predetermined threshold or more when the vehicle does not pass, and the blocking unit 87 when the vehicle passes and the sensing piece 81 is bent downward. Since the optical signal is cut off, the optical signal below the set value TH is received.

In addition, the receiver 863 transmits the received optical signal value to the controller 30 of FIG. 11 to be described later.

9 is a perspective view illustrating the switch module of FIG. 2, and FIG. 10 is a cross-sectional view of FIG. 9.

The switch modules 9 and 9 'of FIGS. 9 and 10 have an enclosure 92 having the same shape as that of the enclosure 82 of the sensor module 8 of FIG. 6 and have a length. The sensing plate 91 formed is mounted on both sides of the upper surface of the housing 92.

In addition, the switch module (9), (9 ') is formed of a plastic material and vertically installed in the interior of the receiving groove 93 of the housing 92 vertically 94, and formed of copper (Cu) material vertical The contact portion 95 is installed on the upper portion of the portion 94. In this case, the contact portion 95 is installed to be spaced apart from the lower surface of the sensing plate 91.

The switch modules 9 and 9 ′ configured as described above are provided with the contact portion 95 and the sensing plate 91 spaced apart from each other in the receiving groove 93 so that the sensing plate 91 is provided when the vehicle passes through. When curved downward, the sensing plate 91 contacts the contact portion 95, thereby closing the circuit and outputting an 'ON' signal.

In addition, it is preferable that an insulator 99 is provided on the sensing plate 91 to protect the sensing plate 91.

That is, the switch modules 9 and 9 'installed in the outer two rows of the inner housing 7 are used to detect the vehicle speed and the axle, and thus, simply use' ON ',' Since it is possible to use only the OFF 'output signal, it is configured to form a contact without using optical sensors such as the sensor modules 8 and 8'.

11 is a block diagram showing a controller applied to the present invention.

The controller 30 of FIG. 11 has a signal including an amplifier and an A / D circuit for removing noise of signals input from the sensor modules 8, 8 'and the switch modules 9, 9'. A processing unit 32, a database unit 33 storing data, a speed calculating unit 34 calculating a vehicle speed through an 'ON / OFF' signal input from the switch modules 9 and 98 '; The wheel width calculation unit 35 calculates the wheel width based on the detection signals input from the sensor modules 8 and 8 'and calculates the wheel width through the detection signals input from the sensor modules 8 and 8'. Wheelbase calculation unit 3 which calculates the length of the vehicle, that is, the wheelbase of the vehicle, by the time when the front wheel and the rear wheel pass the sensing piece equal to the speed of the speed calculation unit 34 and the wheel calculation unit 36, A vehicle model discrimination unit 38 for determining a vehicle model of the vehicle, and a control unit 31 for controlling these control objects 32, 33, 34, 35, 36, 37, and 38. )

The control unit 31 is an operating system (OS) of the controller 30, and when the optical signal reception value is received from the sensor modules 8 and 8 ′ through the signal processing unit 32, the control unit 31 sets the received reception value. If the received value is more than the set value TH, it is determined that no vehicle traffic is made. If the received value is less than the set value TH, the vehicle is determined that the traffic has been made. The passing signal of passing and the position information of the sensing piece 81 in which the vehicle passes are input to the wheel width calculation unit 35 and the wheel width calculation unit 36.

In addition, the control unit 31 determines that the signal input from the switch modules 9 and 9 through the signal processing unit 32 is the 'OFF' signal, and if the input signal is the 'OFF' signal, the vehicle Judging that the passage has been passed, the position information of the contact portion 95 where the traffic signal and the contact are made is input to the speed calculating portion 34 and the wheelbase calculating portion 37.

In addition, the control unit 31 inputs the speed value calculated by the speed calculating unit 34 to the wheelbase calculating unit 37, and the speed calculating unit 34, the wheel width calculating unit 35, the wheeling unit calculating unit 36 and the wheelbase. The calculated value calculated by the calculating unit 37 is input to the vehicle type discriminating unit 38.

The database unit 32 includes speed information detected by the speed calculating unit 34, the wheel width calculating unit 35, the wheeling unit calculating unit 36, the wheelbase calculating unit 37, and the vehicle model discriminating unit 38, and the wheel width information, and rounding. Information, wheelbase information and vehicle model information are stored.

In addition, the database unit 32 stores preset vehicle model data. In this case, the vehicle model data is defined as data in which wheel width, leap and wheelbase information according to the vehicle model is preset and stored.

In addition, the database unit 32 includes position information of the sensor modules 8, 8 'and the switch modules 9, 9', and the sensing piece 81 of the sensor modules 8, 8 '. The distance difference between the adjacent sensing pieces and the position information of each of the sensing pieces 81 and the position information of the contact portions 95 of the switch modules 9 and 9 'are stored.

The speed calculating unit 34 uses the traffic signal, the detection time, and the distance difference information of the switch modules 9 and 9 'to the switch modules 9 and 9' input from the control unit 31. Calculate the speed. The calculated speed value is input to the wheelbase calculation unit 37 and the vehicle model discrimination unit 38 under the control of the controller 31.

The wheel width calculation unit 35 includes a traffic signal for the sensor modules 8 and 8 ′ input from the control unit 31, a detection time, position information of the pressed sensing pieces 81, and adjacent sensing pieces 81. The wheel width is calculated by using the number and the distance of the sensing pieces 81 in the pressed state through the distance difference information.

The lubrication calculation unit 36 is a traffic signal for the sensor modules 8 and 8 ′, which are input from the control unit 31, a sensing time, position information of the pressed sensing pieces, and a distance between adjacent sensing pieces 81. Based on the difference information, the number of pieces of the sensing pieces 81 in a pressed state, location information, and distance difference information are calculated.

Wheelbase calculation unit 37 is a time for the front wheel and the rear wheel to pass through the same detection plate as the vehicle speed through the speed information, the traffic signal and the detection time for the switch module (9), (9 ') input from the control unit 31 Calculates the length of the vehicle, that is, the wheelbase.

The vehicle model discrimination unit 38 stores the wheel width information input from the wheel width calculation unit 35, the wheel width information input from the wheel width calculation unit 36, and the wheelbase information received from the wheelbase calculation unit 37 in the previously stored car model data. By comparison, the vehicle model of the passing vehicle is determined.

In addition, although not shown in FIG. 11, the controller 30 may include a module for detecting a driving direction of the vehicle through signals input from the sensor modules 8, 8 ′ and the switch modules 9, 9 ′; The detector may be further configured.

As described above, the non-contact type vehicle classification device 1 according to the embodiment of the present invention uses signals detected by the sensor modules 8 and 8 'in the case of lubrication and lubrication width, and in the switch modules 9 and 9'. By using the detected signals in speed and wheelbase detection, the overall operation speed and detection accuracy are increased.

1: Non-contact type classification device 3: Base plate
5: External housing 7: Internal housing
8, 8 ': sensor module 9, 9': switch module
81: detection 82: enclosure 83: receiving groove
85: substrate 86: optical sensor 87: cutout
88, 89: slope 861: transmitter 863: receiver

Claims (4)

A frame having an upper surface pressed against the vehicle wheel and having an insertion groove open in the longitudinal direction on the lower surface thereof;
A plurality of sensing pieces formed of an elastic plate having an elastic force and bent downward by the pressing of the upper surface of the frame and aligned in the longitudinal direction, blocking portions provided on the lower surfaces of the sensing pieces, and the sensing pieces Each sensor unit is disposed below each sensing piece and is provided with optical sensors for transmitting and receiving an optical signal, and the sensing pieces block the movement of the optical signal when the sensing pieces are bent downward. Sensor modules are configured to be inserted into the insertion groove of the upper frame;
A support plate disposed under the sensor modules;
And a control unit that determines that the sensing piece is curved when the optical signal received value received by the optical sensor is less than a preset set value (TH). The method of claim 1, wherein the control unit calculates the speed, wheel width, leap and wheelbase of the vehicle through the optical signal reception value detected by the sensor modules to determine the vehicle model of the vehicle by comparing with the stored vehicle model data Vehicle classifier. The optical sensor of claim 1 or 2, wherein the optical sensor includes a transmitter for emitting the optical signal and a receiver for receiving the optical signal emitted from the transmitter, wherein the transmitter and the receiver are spaced apart from each other to face each other. And the cut-off part is inserted between the transmitter and the receiver when spaced downward. The method of claim 3, wherein the vehicle classifier is
It is formed of an elastic plate having an elastic force and consists of a sensing plate which is bent downwardly the area pressed by the vehicle wheel when the vehicle passes, and the contact portion formed of a conductor to be spaced apart from the lower surface of the sensing plate Switch modules for outputting an 'On' signal by contacting the contact portion and the sensing plate located directly below the curved sensing plate when the sensing plate is curved;
A signal cable connection part to which a signal cable is connected to supply a signal to the switch modules from the outside;
Further comprising a signal processing unit for processing the on / off (On / Off) signal of the switch modules, the sensor modules and the switch modules are installed to be aligned in four rows, the sensor modules are installed in two rows in the inner two columns, The switch modules are installed in the outer two columns, and the control unit detects the wheel width and roundness of the passing vehicle through signals input from the sensor modules, and the speed of the passing vehicle through signals input from the switch modules. Vehicle type classification apparatus characterized by detecting the wheelbase and the traveling direction.

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