JP2018081540A - Vehicle width measurement system, vehicle width measurement method, and toll collection facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle width measurement system that highly precisely calculates the width of a vehicle even when tires on one side of the vehicle do not ride on a tread.SOLUTION: A tread riding position at which tires of a vehicle A ride on a tread placed on a lane L is acquired. A light emitter E2 disposed at a position at which the light emitter is close to the tread in a lane direction and installed on one side in a width direction of the lane emits inspection light toward the vehicle. A light receiver R2 disposed at a position at which the light receiver is close to the tread in the lane direction, installed on one side in the width direction, and receives reflected light of the inspection light emitted from the light emitter receives the inspection light. A range finder measures a distance from the light emitter to the vehicle on the basis of reception of the inspection light by the light receiver. A vehicle width calculator measures the width of the vehicle by using the tread riding position which is detected from information contained in a tread riding detection signal, and the distance which is detected from information contained in a range finding signal obtained from the range finder.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle width measurement system, a vehicle width measurement method, and a toll collection facility.

  Some toll collection facilities provided at a toll gate on a vehicle-only road are provided with a vehicle detector for detecting the entry and passage (exit) of a vehicle traveling in a lane. For example, a transmission type vehicle detector includes a plurality of pairs of a light emitting unit and a light receiving unit installed so as to face each other across a lane. In this case, each of the plurality of light emitting units emits inspection light, and a plurality of light receiving units associated with each light emitting unit receive the inspection light. According to such a vehicle detector, when a vehicle traveling in the lane exists between the pair of the light emitting unit and the light receiving unit, the inspection light emitted from the light emitting unit to the light receiving unit is blocked by the vehicle body, The light receiving unit does not receive the inspection light. With such a mechanism, the vehicle detector can detect the passage (entrance) and passage of the vehicle one by one based on the presence or absence of light reception in the light receiving unit (for example, see Patent Document 1).

  On vehicle-only roads, fees are often determined according to the type of vehicle that passes. In order to detect the type of vehicle, a tread may be further provided in the vicinity of the vehicle detector. The tread can detect the position where the tire of the vehicle is stepped on, and can detect the distance between the left and right tires of the vehicle based on this detection signal. The distance between the left and right tires (tread length) is used as vehicle width information for determining road tolls. The tread board is also used for the purpose of determining whether the vehicle that has entered the road is moving forward or backward in the vicinity of the automatic toll collector.

JP 2010-198572 A

  By the way, the above-mentioned tread is usually provided so as to cover the entire width direction of the lane at the toll gate. However, when the lane width is wide, the length of the tread manufactured according to a predetermined standard may not be enough for the lane width. In this case, it may be installed close to one side, such as the side where the automatic toll collector is installed, in the travel prohibition zone (island) provided in parallel with the lane. In this case, since the tread is not provided so as to cover the entire width direction of the lane, the tire on one side of the passing vehicle may come off the tread and the vehicle width may not be measured correctly.

  Accordingly, an object of the present invention is to provide a vehicle width measurement system, a vehicle width measurement method, and a toll collection facility that solve the above-described problems.

According to the first aspect of the invention, the vehicle width measurement system (100) includes a tread (60) provided on a lane, and is disposed at a position close to the tread plate in the lane direction. A light emitting part (E2) provided on the side, and disposed on a position close to the tread plate in the lane direction and provided on one side in the width direction, and receives reflected light of the inspection light emitted from the light emitting part from the vehicle And a distance measuring unit (151) for measuring a distance from the light emitting unit to the vehicle based on reception of the inspection light in the light receiving unit.
By setting it as such a structure, even if the tread is not provided in the whole width direction of a lane, the distance from a light emission part to a vehicle can be measured.

In the vehicle width measurement system described above, a vehicle width measuring device (15) including at least the light emitting portion and the light receiving portion is provided in the vehicle detector (10) provided at a position related to the lane direction of the tread. They may be provided side by side in the lane direction.
With such a configuration, the vehicle width measuring device can measure the distance from the light emitting unit to the vehicle at a position close to the position where the treadle is stepped on, so that the traveling direction of the vehicle and the axial direction of the lane Even if the vehicle is tilted with an inclination with respect to the lane, a distance approximately equal to the distance from the light emitting unit to the vehicle at the position where the treadle is stepped on can be measured.

In the vehicle width measurement system described above, the tread is installed in the vicinity of the first travel prohibition zone (I1) that is shorter than the width in the width direction of the lane and parallel to the lane, and the vehicle width measurement device is the first vehicle width measurement device. You may provide in the 2nd driving prohibition zone (I2) on the opposite side to a driving prohibition zone.
By adopting such a configuration, when a tire on one side of the tires on both sides of the vehicle passes through a region where the tread is not laid, the light from the light emitting unit to the vehicle side on that one side Distance can be measured.

In the vehicle width measurement system described above, the tread detection signal transmitted from the tread board is received and calculated based on the tread position detected from the information included in the tread detection signal and the ranging signal obtained by the ranging unit. And a vehicle width calculation unit (152) that measures the vehicle width of the vehicle using the distance.
By adopting such a configuration, when a tire on one side of the tires on both sides of the vehicle passes through a region where the tread is not laid, the light from the light emitting unit to the vehicle side on that one side The distance from the light emitting part to the side on one side of the vehicle and the position where the tire on the other side stepped on the tread is used to calculate the vehicle width indicating the distance between the tires on both sides. It can be measured more accurately.

  According to the second aspect of the invention, the vehicle width measuring method acquires the stepping position of the tread when the vehicle tire steps on the tread provided on the lane, and is positioned close to the tread in the lane direction. The light-emitting portion provided on one side in the width direction of the lane emits inspection light toward the vehicle, and is provided on the one side in the width direction by being arranged at a position close to the tread plate in the lane direction. A light receiving unit that receives reflected light of the inspection light emitted from the light emitting unit, receives the inspection light, and a distance measuring unit from the light emitting unit to the vehicle based on reception of the inspection light in the light receiving unit. The vehicle width calculation unit uses the stepping position detected from the information included in the stepping detection signal and the distance calculated based on the distance measurement signal obtained by the distance measurement unit, The vehicle width of the vehicle is measured.

  According to a third aspect of the invention, a fee collection facility includes the vehicle width measurement system described above and an automatic fee collection device.

  According to the present invention, the vehicle width of the vehicle can be calculated with high accuracy even when the tire on one side of the vehicle does not step on the tread.

It is a figure which shows the structure of the toll collection equipment provided with the vehicle width measuring system by one Embodiment of this invention. It is a figure which shows the structure of the vehicle detector and vehicle width measuring device by one Embodiment of this invention. It is a 1st figure which shows the laying state of the tread according to one Embodiment of this invention. It is a 2nd figure which shows the laying state of the tread according to one Embodiment of this invention. 1 is a first diagram showing an overview of a vehicle width measurement system according to an embodiment of the present invention. It is a functional block diagram of the vehicle width measurement system by one Embodiment of this invention. It is a figure which shows the processing flow of the vehicle width measuring system by one Embodiment of this invention. It is a 2nd figure which shows the outline | summary of the vehicle width measuring system by one Embodiment of this invention. It is a 3rd figure which shows the outline | summary of the vehicle width measuring system by one Embodiment of this invention. It is a 4th figure which shows the outline | summary of the vehicle width measuring system by one Embodiment of this invention.

Hereinafter, a vehicle width measurement system according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a toll collection facility provided with a vehicle width measurement system according to the present embodiment.
The toll collection facility 1 is provided at a toll gate such as an expressway that is a toll road, and collects a toll from the user of the expressway according to the type of vehicle A on which the user gets. Equipment. The toll collection facility 1 includes a vehicle width measurement system 100.
In the example shown in FIG. 1, a vehicle A on which a highway user rides travels in a lane L that leads from the highway side to the general road side in the toll collection facility 1 provided at the exit toll booth. Show. On both sides of the lane L, islands I1 and I2 (first travel prohibition zone and second travel prohibition zone) which are travel prohibition zones are laid, and various devices constituting the toll collection facility 1 are installed.
Hereinafter, the direction in which the lane L extends (± X direction in FIG. 1) is described as “lane direction”, and the highway side (+ X direction side in FIG. 1) in the lane direction of the lane L is “upstream side”. Alternatively, it is also referred to as “the front side in the traveling direction” of the vehicle A. Further, the general road side (the −X direction side in FIG. 1) in the lane direction of the lane L is also referred to as “downstream side” or the “traveling direction rear side” of the vehicle A.

As shown in FIG. 1, the toll collection facility 1 includes a vehicle detector 10 (10A, 10B, 10D), a vehicle width measuring device 15, an automatic toll collector 20, a start controller 40, and a start side vehicle detection. A container 50 and a tread board 60 are provided.
The vehicle detector 10 (10A, 10B, 10D) detects the approach of the vehicle A traveling on the lane L to the exit toll gate. The vehicle detector 10 is provided on the upstream side of the lane L, and has various sensors (light emitting tower 10A, light receiving tower 10B) provided on the islands I1 and I2.
The vehicle width measuring device 15 (15A) measures the vehicle width of the vehicle. The width of the vehicle is used to determine the type of vehicle used to determine the toll (for example, “light vehicle”, “normal vehicle”, “medium-sized vehicle”, “large-sized vehicle”, “extra-sized vehicle”, etc.) measure. The vehicle width measuring device 15 has a light-emitting / receiving tower 15A. The vehicle width measuring device 15 (15A) is provided side by side in the lane direction on the vehicle detector 10 provided at a position related to the lane direction of the tread plate 60.
The tread board 60 is embedded on the road surface of the lane L.

The automatic toll collector 20 is a machine that performs a toll collection process by presenting a charge amount to a driver or the like (user) of the vehicle A traveling in the lane L. On the front face of the automatic toll collector 20 (the face facing the lane L side), there are provided a display for presenting a billing amount, a reception opening for receiving bills, coins, credit cards, and the like.
The automatic toll collection device 20 is provided on the island I1 (first travel prohibition zone) on the downstream side of the vehicle detector 10 and the vehicle width measuring device 15 in the toll collection facility 1, and is provided by the vehicle width measuring device 15 and the tread board 60. An amount corresponding to the vehicle type classification of the vehicle A based on the determined vehicle width is charged.

The start controller 40 is a device that is provided on the downstream side of the automatic toll collector 20 and controls the start of the vehicle A traveling in the lane L. For example, the start controller 40 blocks the lane L so that the driver or the like of the vehicle A that has entered the lane L does not start the vehicle A until the necessary amount of money is paid through the automatic toll collector 20. Further, when the payment is completed, the lane L is opened to leave the vehicle A.
The start side vehicle detector 50 is provided on the most downstream side of the lane L and detects the exit of the vehicle A from the toll collection facility 1.

  The light emitting tower 10A and the light receiving tower 10B are provided on the islands I1 and I2 laid across the lane L, respectively. The vehicle detector 10 determines whether or not the vehicle A (vehicle body) traveling in the lane L exists through the light emitting tower 10A and the light receiving tower 10B facing each other with the lane L in the lane width direction (± Y direction). Detect traffic (approach) for one vehicle.

  The tread 60 is disposed on the road surface of the lane L so as to extend in the lane width direction, and detects treading by the tire of the vehicle A that travels through an energization sensor charged therein. Here, the positions of the vehicle detector 10 and the tread board 60 in the lane direction (± X direction) are the same. Accordingly, the number of axles of the vehicle A can be detected with high accuracy by acquiring the number of times the treadle constituting the tread 60 is stepped on while the passage of the vehicle A is being detected by the vehicle detector 10. . Further, the tread 60 outputs information on the stepping position when the tire of the vehicle A steps on the tread. The information on the stepping position may be indicated by, for example, an electrical resistance value when the tire steps on the tread.

  A first control device 10D is provided inside the light receiving tower 10B. The first control device 10D performs control for vehicle detection. Specifically, the first control device 10 </ b> D detects the passage of the vehicle A based on various detection signals from the vehicle detector 10 and the tread board 60. In addition, in this embodiment, although 1st control apparatus 10D is illustrated in the aspect incorporated in the light receiving tower 10B of the vehicle detector 10, in other embodiment, it is not limited to this aspect. For example, in another embodiment, the first control device 10D is built in a device other than the island I1 (I2) or in a device other than the vehicle detector 10 installed in a remote place, and is connected by a communication network or the like. There may be.

  The vehicle width measuring device 15 includes a light emitting / receiving tower 15A, and a second control device 15B is provided inside the light emitting / receiving tower 15A. The light emitting / receiving tower 15A includes a light emitting unit and a light receiving unit, and the inspection light emitted from the light emitting unit is irradiated toward the vehicle A. The light receiving portion of the light emitting / receiving tower 15A receives the reflected light of the inspection light. The second control device 15B of the vehicle width measuring device 15 obtains the time from the emission of the inspection light to the reception of the reflected light, and measures the distance from the light emitting / receiving tower 15A to the vehicle A by this time. The vehicle width of the vehicle A is measured using the distance from the light emitting / receiving tower 15A to the vehicle A and the stepping position when the vehicle A steps on the tread 60 with tires. The measurement of the vehicle width may be performed by the second control device 15B. In the present embodiment, the second control device 15B is illustrated in a mode built in the light-emitting / receiving tower 15A of the vehicle width measuring device 15, but is not limited to this mode in other embodiments. For example, in another embodiment, the second control device 15B is built in a device other than the island I1 (I2) or in a device other than the vehicle width measuring device 15 installed in a remote place, and is connected via a communication network or the like. It may be.

FIG. 2 is a diagram showing the configuration of the vehicle detector and the vehicle width measuring machine according to the present embodiment.
As described with reference to FIG. 1, the vehicle detector 10 includes the light emission tower 10A, the light receiving tower 10B, and the first control device 10D.

The light emitting tower 10A has a plurality of light emitting portions E1 that emit first inspection light P1 (for example, infrared light) having a predetermined wavelength toward the light receiving tower 10B. The light emitting unit E1 is, for example, a light emitting diode (LED) element having a predetermined directivity (degree of light spreading from the light source). A plurality of the light emitting units E1 are arranged in the height direction at predetermined intervals on the surface of the light emitting tower 10A facing the light receiving tower 10B.
As will be described later, each light emitting unit E1 emits light one by one in sequence while shifting the timing in accordance with a predetermined light emission control signal (described later) input from the first control device 10D.

The light receiving tower 10B has a plurality of light receiving parts R1 capable of receiving the first inspection light P1 emitted from the light emitting part E1. The light receiving unit R1 is a light receiving sensor that outputs a first light reception detection signal based on the reception of the first inspection light P1. The first light reception detection signal output from the light receiving unit R1 is input to the first control device 10D and used to determine whether or not the light receiving unit R1 has received light. A plurality of light receiving parts R1 are arranged side by side at predetermined intervals in the height direction on the surface of the light receiving tower 10B facing the light emitting tower 10A. Here, each of the light receiving portions R1 is provided at the same height as each of the plurality of light emitting portions E1 arranged in the light emission tower 10A.
Each light receiving unit R1 detects the presence or absence of light reception in accordance with the timing at which each light emitting unit E emits light in accordance with a predetermined light receiving control signal input to each from the first control device 10D.

  Each light emitting part E1 and each light receiving part R1 are arranged in the height direction at intervals of, for example, about 15 mm to 30 mm in the light emitting tower 10A and the light receiving tower 10B. In addition, the arrangement | positioning space | interval of each light emission part E1 or each light-receiving part R1 does not necessarily need to be equal intervals. As described above, in the present embodiment, each light emitting unit E1 includes a pair of light receiving units R1 arranged at the same height.

The light-emitting / receiving tower 15A of the vehicle width measuring device 15 shown in FIG. 2 has a plurality of light-emitting portions E2 that emit second inspection light P2 (for example, infrared light) having a predetermined wavelength toward a passing vehicle. . The light emitting unit E2 is, for example, a light emitting diode (LED) element having a predetermined directivity (degree of light spreading from the light source).
The light-emitting / receiving tower 15A includes a plurality of light-receiving portions R2 that can receive the reflected light reflected by the vehicle with the second inspection light P2 emitted from the light-emitting portion E2. The light receiving unit R2 is a light receiving sensor that outputs a second light receiving detection signal based on the reception of the second inspection light P2. The second light reception detection signal (ranging signal) output from the light receiving unit R2 is input to the second control device 15B, and is used to determine whether or not the light receiving unit R2 has received light and to calculate the distance to the vehicle A. .

  In the light-emitting / receiving tower 15A, the light-emitting portions E2 and the light-receiving portions R2 are alternately arranged vertically. Adjacent light emitting part E2 and light receiving part R2 form one set, and the light emitting part that forms a set so that the second inspection light P2 emitted by light emitting part E2 is reflected by the vehicle and reaches light receiving part R2. The orientations of E2 and light receiving part R2 are fixed. For example, the light-emitting part E2 and the light-receiving part R2 that form a pair are inclined in the center direction rather than in parallel directions, so that they are mounted so that light can be emitted or received with the highest directivity and reflected by the vehicle. The light may be received with high sensitivity by the light receiving unit R2. The reflected light reflected by the vehicle is scattered light, and the light receiving unit R2 can receive the scattered light.

FIG. 3 is a first view showing the laying state of the tread board.
In FIG. 3, the diagram shown in (a) is an overhead view of the toll collection facility, and the diagram in (b) is when the toll collection facility is viewed from behind the vehicle when the vehicle A gets over the tread 60. The figure is shown. As shown in FIG. 3, the width w of the lane L sandwiched between the islands I1 and I2 laid in parallel on both sides of the lane and the length d of the tread 60 manufactured according to a predetermined standard are almost equal to each other. If equal, there is almost no region in the lane L where the tread plate 60 is not embedded. In the case of the arrangement of the tread 60 shown in FIG. 3, the vehicle A will step on the tread constituting the tread 60 regardless of the position in the width direction of the lane L. The stepping detection signal including information indicating the stepping positions of the tires on both sides of the vehicle A is output. A device (such as the second control device 15B) that has received the stepping signal can detect the stepping position included in the signal and determine the vehicle width of the vehicle A (the tire interval called the tread). In the toll collection facility in FIG. 3, the automatic toll collector 20 is arranged on the island I1 on the right side of the lane L. Therefore, for the purpose of inserting a toll ticket or the like into the automatic toll collector 20, the driver of the vehicle A is relatively The vehicle A often passes close to the island I1 laid on the right side of the lane L.

FIG. 4 is a second view showing the laid state of the tread board.
Also in FIG. 4, as in FIG. 3, (a) is an overhead view of the toll collection facility, and (b) is a view of the toll collection facility from behind the vehicle when the vehicle A gets over the tread 60. The figure is shown. As shown in FIG. 4, when the width w of the lane L is wider than the length d of the tread 60 manufactured according to a predetermined standard, the unembedded area where the tread 60 is not embedded in the lane L x occurs. By preparing the tread 60 corresponding to a length w + d longer than the length d, it is possible to prevent the unembedded region x of the tread 60 from being generated. However, when the length of the tread 60 is standardized and already manufactured, cost and time are required to newly manufacture the tread 60 having a longer length. In addition, there may be a reason why the tread 60 cannot be embedded because some structure is already embedded in the unembedded region x. When the unembedded area x of the tread 60 exists and one wheel of the vehicle A passes through the area x, the tread 60 outputs a tread detection signal including only information on the position tapped by the other tire. In this case, a device (such as the second control device 15B) that has received the treading detection signal cannot detect the vehicle width of the vehicle A. In order to solve such a problem, the vehicle width measurement system 100 according to the present embodiment has the following configuration.

FIG. 5 is a first diagram showing an outline of the vehicle width measurement system.
5A and 5B, FIG. 5A is a view of the toll collection facility from above, and FIG. 5B is a view of the toll collection facility from behind the vehicle when the vehicle A gets over the tread 60. The figure when it sees is shown.
FIG. 5 differs from FIG. 4 in that a vehicle width measuring device 15 is present in the toll collection facility 1. The laying position of the tread board 60 and the width w of the lane L (lane width w in the toll collection facility) are the same as in FIG. As described above, the tread plate 60 outputs a stepping position detection signal including information on a position where both wheels or one wheel of the vehicle A is stepped on. The vehicle detector 10 detects the passage of the vehicle. The vehicle width measuring device 15 is a distance measuring device that indicates the light reception based on the light emission of the second inspection light of the light emitting portion E2 provided in the light emitting and receiving tower 15A and the reflected light of the second inspection light in the light receiving portion R2. Output a signal.

FIG. 6 is a functional block diagram of the vehicle width measurement system.
FIG. 7 is a diagram showing a processing flow of the vehicle width measurement system.
As shown in this figure, the vehicle width measuring system 100 includes a tread 60 and a vehicle width measuring device 15 (light emitting / receiving tower 15A, second control device 15B). The second control device 15B may be a computer, and has the functions of a distance measuring unit 151 and a vehicle width calculating unit 152 inside when the CPU executes a control program. The second control device 15B receives a tread detection signal from the tread board 60 (step S101). The second control device 15B receives the ranging signal from the light-emitting / receiving tower 15A (step S102). The second control device 15B calculates the vehicle width w2 of the vehicle A using the tread detection signal and the distance measurement signal.

  Specifically, the vehicle width calculation unit 152 determines whether information indicating two stepping positions is included in the stepping detection signal (step S103). If the information indicating the two stepping positions is included in the stepping detection signal, the vehicle width calculation unit 152 calculates a difference in position from the information indicating each position, and uses the difference information as information on the vehicle width w2. Output (step S104). The distance indicated by w1 in FIG. 5 is the distance from the end of the island I1 where the tread 60 is close to the tread position where the tire has passed on the tread constituting the tread 60. When the stepping detection signal includes two stepping positions, if one is w1-1 and the other is w1-2, the vehicle width w2 can be calculated from the absolute value of the difference between w1-1 and w1-2. In the present embodiment, it is defined that the distance between the tires on both sides is the vehicle width w2. When only the information indicating one stepping position is included in the stepping detection signal, the vehicle width calculation unit 152 calculates the distance indicated by w1 in FIG. 5 based on the stepping position (step S105). Even in the case of only information indicating one stepping position, the distance indicated by w1 is the distance from the end of the island I1 to which the tread 60 is close to the stepping position where the tire has passed on the tread constituting the tread 60. On the other hand, the distance measurement unit 151 detects w3 based on the distance measurement signal. In this embodiment, the distance w3 is the distance from the light emitting part E2 of the light emitting / receiving tower 15A to the side surface of the vehicle. This distance w3 is the island I2 (second travel prohibition zone) where the light emitting / receiving tower 15A is installed. It may be defined that it coincides with the distance from the boundary with the lane L to the side surface of the vehicle. The distance measuring unit 151 measures, for example, the time from when the light emitting unit E2 emits light until the light receiving unit R2 receives light, and using this time and the speed of light, the distance to the side of the vehicle is calculated using a known distance calculation formula. The distance w3 is calculated. The distance measuring unit 151 outputs the distance w3 to the vehicle width calculating unit 152. The vehicle width calculation unit 152 calculates the vehicle width w2 of the vehicle A by subtracting the values of w1 and w3 from the width w of the lane (step S106) and outputs it.

  The second control device 15B may be provided in the automatic fee collection / acquisition machine 20, for example. The second control device 15B transmits the information on the calculated vehicle width w2 to the automatic toll collector 20. The automatic toll collector 20 determines the vehicle type classification (for example, “light vehicle”, “normal vehicle”, “medium-sized vehicle”, “large-sized vehicle”, “extra-sized vehicle”, etc.) using the information of the vehicle width w2. . The automatic toll collector 20 calculates the toll based on the vehicle type classification and the toll section determined from the inserted toll ticket, and outputs it to the display monitor.

  According to the processing of the vehicle width measurement system 100 described above, the vehicle width of the vehicle A can be calculated even when the tire on one side of the vehicle A does not step on the tread plate 60. Thereby, the calculation accuracy of the vehicle width can be increased.

  In the processing of the vehicle width measurement system 100 described above, the second control device 15B acquires the tread detection signal from the tread plate 60 and the distance measurement signal from the light emitting / receiving tower 15A, and the vehicle is based on the acquired signals. The width is calculated. However, the second control device 15B may or may not receive the ranging signal from the light emitting / receiving tower 15A when the treading detection signal includes information on two treading positions. It is not necessary to use the information of the distance measurement signal. The second control device 15B determines that the tire on one side of the vehicle A has not stepped on the stepping plate 60 only when the stepping detection signal includes only one stepping position information, and transmits a ranging signal to the light-emitting / receiving tower 15A. May be requested. That is, when only one stepping position information is included in the stepping detection signal, the second control device 15B determines the vehicle width as described above using the information indicating the stepping position included in the stepping detection signal and the distance measurement signal. You may make it calculate.

FIG. 8 is a second diagram showing an outline of the vehicle width measurement system.
In FIG. 8, as in FIGS. 3 to 5, (a) is an overhead view of the toll collection facility, and (b) is a view of the toll collection facility from behind the vehicle when the vehicle A gets over the tread 60. The figure in the case of
8, the vehicle width measuring device 15 is installed on the islands I1 and I2 on the upstream side (front side in the traveling direction) from the lane position of the light emitting tower 10A of the vehicle detector 10 and the tread board 60, as compared with FIG. Is different. In this case, when the vehicle enters the toll collection facility 1, the vehicle width measuring device 15 first measures the distance w3 to the vehicle A, and then the tread plate 60 outputs a stepping detection signal to the first control device 10D.

FIG. 9 is a third diagram showing an outline of the vehicle width measurement system.
9A and 9B, FIG. 9A is a view of the toll collection facility from above, and FIG. 9B is a toll collection from the back of the vehicle when the vehicle A gets over the tread 60. The figure when the equipment is seen is shown.
FIG. 9 shows an example in which the tread board 60 is laid so as to be close to the island I2 on the opposite side across the lane L from the island I1 where the automatic toll receiver 20 is installed, as compared with FIG. ing. That is, the island I2 is in the first travel prohibition zone and the island I1 is in the second travel prohibition zone. In this case, the unembedded region x of the tread 60 is generated on the island I1 side where the automatic toll collector 20 is installed as shown in FIG. In the case of such a laying state of the tread 60, the light emitting / receiving tower 15A of the vehicle width measuring device 15 is located downstream of the light receiving tower B on the island I1 where the automatic toll collector 20 is installed. It is installed adjacent to. That is, the light emitting / receiving tower 15A of the vehicle width measuring device 15 is provided on the side of the lane L where the unfilled area x of the lane L is generated. In the case of the vehicle width measurement system 100 shown in FIG. 9, the vehicle width w2 can be calculated in the same manner as the above-described processing.

  It is assumed that the length in the width direction (direction perpendicular to the axis of the lane L) of the unembedded region x described above is a region longer than the width of the tire of the vehicle A itself. Depending on the condition of the lane L, an unembedded region x of the tread 60 that is longer than the tire width may be generated on both sides of the lane L, respectively. In such a case, the light emitting / receiving tower 15A of the vehicle width measuring device 15 may be provided on each of the islands I1 and I2 laid on both sides of the lane across the lane.

FIG. 10 is a fourth diagram showing an outline of the vehicle width measuring system.
Also in FIG. 10, as in FIGS. 3 to 5, 8, and 9, (a) is a view of the toll collection facility from above, and (b) is behind the vehicle when the vehicle A gets over the tread 60. The figure when the toll collection facility is seen from is shown.
Compared with the vehicle width measurement system 100 shown in FIG. 5, the vehicle width measurement system 100 shown in FIG. 10 does not have the light emission tower 10 </ b> A and the light reception tower 10 </ b> B of the vehicle detector 10, and the light emission light reception tower 15 </ b> A of the vehicle width measurement machine 15. However, it is an example in the case of performing both distance measurement for vehicle width measurement and vehicle detection. If the vehicle width measuring device 15 can receive the reflected light of the second inspection light in the light receiving unit R2, it can detect that the vehicle A has passed. Further, the light emitting / receiving tower 15A of the vehicle width measuring device 15 can also measure the distance w3 to the vehicle by the distance measurement signal. Thereby, the light emitting tower 10A and the light receiving tower 10B constituting the vehicle detector 10 are not necessary, and it is possible to provide a function of detecting the vehicle width with high accuracy in addition to detecting the vehicle in a narrow space such as the islands I1 and I2.

  Each of the above devices has a computer system inside. Each process described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by the computer reading and executing the program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 1 ... Toll collection facility 10 ... Vehicle detector 10A ... Light emission tower 10B ... Light reception tower 10D ... First control device 15 ... Vehicle width measuring device 15A ... Light emission light reception tower 20 ... Automatic toll collector 60 ... Footboard 100 ... Vehicle width measurement system A ... Vehicle L ... Lanes I1, I2 ... Island

Claims (6)

A footboard on the lane,
A light emitting portion disposed at a position close to the tread board in the lane direction and provided on one side in the width direction of the lane;
A light receiving portion that is disposed at a position close to the tread plate in the lane direction and provided on the one side in the width direction, and that receives reflected light of inspection light emitted from the light emitting portion from a vehicle;
A distance measuring unit for measuring a distance from the light emitting unit to the vehicle based on reception of the inspection light in the light receiving unit;
A vehicle width measurement system comprising: The vehicle width according to claim 1, wherein a vehicle width measuring device including at least the light emitting unit and the light receiving unit is provided side by side in the lane direction on a vehicle detector provided at a position related to the lane direction of the tread plate. Measuring system. The tread is installed close to the first travel prohibition zone that is shorter than the length in the width direction of the lane and parallel to the lane,
The vehicle width measurement system according to claim 2, wherein the vehicle width measuring device is provided in a second travel prohibition zone opposite to the first travel prohibition zone. The tread detection signal transmitted from the tread board is received, the tread position detected from the information included in the tread detection signal, and the distance calculated based on the distance measurement signal obtained by the distance measurement unit, A vehicle width calculation unit for measuring the vehicle width of the vehicle;
The vehicle width measurement system according to any one of claims 1 to 3, further comprising: Acquire the stepping position of the tread when the tire of the vehicle steps on the tread provided on the lane,
A light emitting unit disposed at a position close to the tread plate in the lane direction and provided on one side in the width direction of the lane emits inspection light toward the vehicle,
A light receiving portion that is disposed at a position close to the tread board in the lane direction and provided on one side in the width direction, and that receives reflected light of the inspection light emitted by the light emitting portion, receives the inspection light,
The distance measuring unit measures the distance from the light emitting unit to the vehicle based on the reception of the inspection light in the light receiving unit,
The vehicle width calculation unit calculates the vehicle width of the vehicle using the stepping position detected from the information included in the stepping detection signal and the distance calculated based on the distance measurement signal obtained by the distance measurement unit. Car width measurement method to measure.   A toll collection facility comprising the vehicle width measuring system according to claim 1 and a toll collector.

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