JP2012078219A - Vehicle weighing system for toll road - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle weighing system for a toll road capable of surely conveying information about abnormality in weight of a vehicle such as violation of gross vehicle weight to a driver.SOLUTION: A vehicle weighing system for a toll road includes a first vehicle measuring device 3 which is installed on an entrance lane of a toll gate of a toll road, which calculates each axle load and gross weight of a vehicle 1 in running condition and determines whether or not the calculated axle loads and gross weight are abnormal based on each threshold, and which transmits information about abnormality to an in-vehicle ETC 2 installed in the vehicle 1 when the determination result shows the abnormality, and the in-vehicle ETC 2 for outputting the information transmitted from the first vehicle measuring device 3 by voice.

Description

  The present invention relates to a toll road vehicle weighing system.

  Conventionally, an axle weight meter is installed in an entrance lane of a toll road such as an expressway to measure the axle weight and total weight of the vehicle (see, for example, Patent Document 1). If the axle weight or gross weight is in violation (exceeding the limit set by law), the warning sign on the front of the vehicle traveling direction against the infringing vehicle will display a text such as “Axis weight violation”. Lights up to inform the driver. The purpose of this is to reduce the number of violating vehicles by identifying the overloaded vehicles and overloading vehicles that are the main causes in order to reduce damage to roads and piers.

  Patent Document 2 describes a vehicle measurement device that can determine the center of gravity position in the vehicle width direction (left-right direction) and the center of gravity position in the full length direction (front-rear direction). Patent Document 3 describes a track scale that can measure the total weight, axial weight, wheel weight, and the like of the truck in the process of the truck resting on the platform.

JP 2005-92283 A Japanese Patent Laid-Open No. 6-58796 JP 2006-3291 A

  In recent years, the ETC system has become widespread on toll roads such as expressways, and the toll gate lane (ETC lane) has a high traffic speed and the width of the lane road is narrow. You may not notice the lighting of the warning display board. Therefore, the driver of the violating vehicle cannot grasp the warning unless he / she consciously looks at the warning display board. Also, if the entrance lane is congested or if large vehicles are passing continuously, it is not possible to know which vehicle is displaying the warning and the driver of the violating vehicle It may not be recognized as a warning. Further, the driver is not informed about the information about the horizontal center of gravity position of the vehicle (the center of gravity position in the vehicle width direction and the center of gravity position in the full length direction).

  At present, the axle load scale installed on a highway or the like cannot determine the horizontal center of gravity position of the vehicle. Moreover, in the vehicle measuring device described in Patent Document 2, the horizontal center of gravity position of the vehicle can be obtained. For that purpose, the distance between the axles of the vehicle and the width between the left and right wheels (tread width) are preliminarily known. It is necessary to acquire (store) as

  The present invention has been made in order to solve the above-described problems, and is a toll road vehicle weighing system capable of reliably transmitting information on a vehicle weight abnormality such as a total weight violation to a driver. It is intended to provide. Another object of the present invention is to provide a toll road vehicle weighing system capable of reliably transmitting to the driver information related to an abnormal center of gravity position such as an abnormal uneven load. In addition, the present invention realizes a vehicle measuring device that can calculate the center of gravity position in the width direction and the total length direction of the vehicle without using information on the tread width and the inter-shaft distance of the vehicle, and uses this to measure the position of the center of gravity. An object of the present invention is to provide a toll road vehicle weighing system capable of generating information about an abnormality and reliably transmitting the information to the driver.

  In order to achieve the above object, the toll road vehicle weighing system of the present invention is installed in the entrance lane of the toll gate of the toll road, calculates each axle weight and total weight of the vehicle in the running state, and calculates each calculated It is determined whether or not the axle weight and the total weight are abnormal based on the respective threshold values. When the determination result is abnormal, information indicating the abnormality is transmitted to the ETC on-vehicle device mounted on the vehicle. A first vehicle measurement device configured to transmit, and the ETC on-vehicle device mounted on the vehicle and configured to output information transmitted from the first vehicle measurement device by voice. I have.

  According to this configuration, the first vehicle measurement device calculates each axle weight and total weight of the vehicle in a traveling state without stopping the vehicle, and determines whether or not those values are abnormal. When it is abnormal, the information indicating the abnormality is transmitted to the ETC OBE, and the information indicating the abnormality is output from the ETC OBE as a sound. ) Can be reliably transmitted information on the vehicle weight abnormality.

  In the above configuration, the first vehicle measurement device is provided in front of the toll gate in the vehicle traveling direction when any of the calculated determination results of each axle weight and total weight is abnormal. Information for guiding to the shelter location may also be configured to be transmitted to the ETC on-vehicle device. As a result, the driver can stop the vehicle at the evacuation place, inspect the cargo, and contribute to safe driving thereafter. For example, when the load is fixed with a rope, it is possible to take measures against dropping the load by increasing the number of ropes and contribute to safe driving thereafter.

  Further, a second vehicle measurement device that is installed in a retreat place provided in front of the toll gate in the vehicle traveling direction and calculates each axle weight and total weight of the vehicle with higher accuracy than the first vehicle measurement device. The first vehicle measurement device indicates an instruction to perform remeasurement with the second vehicle measurement device when any of the determination results of the calculated axle weight and total weight is abnormal. Information may also be configured to be transmitted to the ETC on-board unit.

  According to this configuration, the driver of the vehicle determined to be abnormal by the first vehicle measurement device can obtain more accurate information by re-measurement using the second vehicle measurement device with high accuracy. In addition, the cargo can be checked at the shelter and contributed to safe driving thereafter.

  The first vehicle measurement device further calculates at least one of the center-of-gravity position in the width direction and the center-of-gravity position in the full-length direction of the vehicle, and whether the calculated center-of-gravity position is abnormal. This may be determined based on a predetermined criterion, and when the determination result is abnormal, information indicating that the abnormality is also transmitted to the ETC on-vehicle device.

  According to this configuration, the first vehicle measurement device transmits information indicating the abnormality to the ETC vehicle-mounted device when the calculated center of gravity position of the vehicle is abnormal, and indicates that the ETC vehicle-mounted device is abnormal. Since the information is output as a voice, not only the information on the vehicle weight abnormality that the total weight is violated but also the information on the center of gravity position abnormality that is an abnormal offset load is reliably transmitted to the vehicle driver. be able to.

  In addition, it is installed in a retreat place provided in front of the toll gate in the vehicle traveling direction, and has a higher accuracy than each of the first vehicle measuring devices, and each center weight and total weight of the vehicle and a center of gravity position in the vehicle width direction. And a second vehicle measuring device that calculates at least one of the center-of-gravity positions in the full-length direction, wherein the first vehicle measuring device calculates the calculated axial weight, total weight, and center of gravity. When any determination result of the position is abnormal, information indicating an instruction to remeasure by the second vehicle measurement device may be transmitted to the ETC on-vehicle device.

  According to this configuration, the driver of the vehicle determined to be abnormal by the first vehicle measurement device can obtain more accurate information by re-measurement using the second vehicle measurement device with high accuracy. In addition, it is possible to check the load at the evacuation place, such as whether the load is offset, and contribute to safe driving after that.

  In addition, the first vehicle measurement device is provided with a evacuation provided in front of the toll gate in the vehicle traveling direction when any of the calculated determination results of each axle weight, total weight, and center of gravity is abnormal. Information for guiding to a place may be transmitted to the ETC on-vehicle device.

  According to this configuration, the driver can stop the vehicle at the evacuation place, inspect the load such as whether the load is offset, and contribute to safe driving thereafter. For example, when the load is fixed with a rope, it is possible to take measures against dropping the load by increasing the number of ropes and contribute to safe driving thereafter.

  In addition, the first vehicle measurement device further includes a distance from the foremost axle of the vehicle to the center of gravity in the full length direction of the vehicle with respect to the distance from the foremost axle to the rearmost axle of the vehicle. The ratio may be calculated as a relative barycentric position, and information indicating the relative barycentric position may be transmitted to the ETC on-vehicle device.

  According to this configuration, the driver can notify the driver of the relative center of gravity position from the ETC vehicle-mounted device, so that the driver can intuitively grasp the center of gravity position of the vehicle in the full length direction.

  In addition, the ETC vehicle-mounted device stores in advance information on the tread width of the vehicle on which the ETC device is mounted and the distance between the axles, and stores the stored information in the first vehicle measurement device. The first vehicle measuring device is configured to calculate each wheel load of the vehicle, and the tread width of the vehicle and each axle transmitted from the ETC onboard device. The center-of-gravity position in the width direction and the center-of-gravity position in the full length direction of the vehicle may be calculated based on the information on the distance between the shafts and the calculated wheel weights and the respective axle weights.

  In addition, the first vehicle measurement device includes a left load measurement unit through which the left wheels of the vehicle sequentially pass, a right load measurement unit through which the right wheels of the vehicle sequentially pass, and a gravity center position calculating unit. Each of the left load measurement unit and the right load measurement unit has a first length in the traveling direction of the vehicle, a loading plate through which one of the left and right wheels of the vehicle passes, A plurality of load sensors arranged at a first interval in the width direction and supporting both end portions of the load plate in the width direction, the load plate of the left load measurement unit and the load measurement unit of the right load measurement unit The loading plates are arranged in a predetermined position along the width direction, and the center-of-gravity position calculating means includes the plurality of left and right load measuring units when the axles of the vehicle pass on the loading plates described above. Based on the load signal of the load sensor and the first interval. And calculating the center of gravity position in the width direction of the vehicle based on the load center of gravity position of each axle and the axle weight of each axle, When the time required for each of the axles of the vehicle to pass on the loading plate is obtained based on the load signal of the load sensor, and any one of the axles starts to pass on the loading plate To determine the travel time until the next axle starts to pass on the load plate, and the inter-axis distance between adjacent axles based on the transit time, the travel time, and the first length of the load plate And the center-of-gravity position in the full length direction of the vehicle may be calculated based on the calculated inter-axis distance and each axial weight.

  According to this configuration, the first vehicle measurement device can calculate the center-of-gravity position in the width direction and the full length direction of the vehicle even if the tread width and the inter-axis distance of the vehicle are unknown. That is, the first vehicle measurement device can calculate the center-of-gravity position in the width direction and the full length direction of the vehicle without using information on the tread width and the inter-axis distance of the vehicle.

  The present invention is to provide a toll road vehicle weighing system having the above-described configuration and capable of reliably transmitting information related to a vehicle weight abnormality such as a total weight violation to the driver. There is an effect that can be done. In addition, the present invention has an effect that it is possible to provide a toll road vehicle weighing system capable of reliably transmitting to the driver information related to an abnormal center of gravity position such as an abnormal uneven load. In addition, the present invention realizes a vehicle measuring device that can calculate the center of gravity position in the width direction and the total length direction of the vehicle without using information on the tread width and the inter-shaft distance of the vehicle, and uses this to measure the center of gravity position. There is an effect that it is possible to provide a toll road vehicle weighing system that can generate information about an abnormality and reliably transmit the information to the driver.

It is a conceptual diagram which shows the structure of the toll road vehicle measurement system of embodiment of this invention. (A) is a top view of the vehicle measurement part of the 1st vehicle measuring device in the vehicle measurement system of embodiment of this invention, (b) is the cross section along the AA in FIG. 2 (a). It is a figure and (c) is sectional drawing along the BB line in FIG.2 (b). It is a block diagram which shows the structure of the 1st vehicle measuring device of the vehicle measurement system of embodiment of this invention. (A) is a top view of one vehicle used as the object to be measured in the embodiment of the present invention, and (b) is a side view of the vehicle. It is a flowchart which shows an example of operation | movement of the 1st vehicle measuring device in embodiment of this invention. (A) is a top view of one vehicle used as the object to be measured in the embodiment of the present invention, and (b) is a side view of the vehicle. (A) is a figure which shows the time-dependent change of the load which a left side loading board receives when a vehicle passes on a loading board, (b) is when the 1st axis | shaft of the vehicle passes on a loading board. FIG. 6 is a diagram showing a passing state of the left wheel (tire) of the first shaft on the left loading plate. (A), (b) is a top view which shows the other structural example of the vehicle measurement part of the 1st vehicle measuring device in embodiment of this invention, respectively.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference symbols throughout all the drawings, and redundant description thereof is omitted. Further, the present invention is not limited to the following embodiment.

(Embodiment)
FIG. 1 is a conceptual diagram illustrating a configuration of a toll road vehicle weighing system according to the present embodiment. Moreover, Fig.2 (a) is a top view of the vehicle measurement part of the 1st vehicle measuring device in the vehicle measurement system of this embodiment, FIG.2 (b) is the AA line in Fig.2 (a). 2C is a cross-sectional view taken along line BB in FIG. 2B. FIG. 3 is a block diagram showing the configuration of the first vehicle measurement device of the vehicle weighing system of the present embodiment.

  The vehicle weighing system of the present embodiment includes an ETC (Electric Toll Collection; on-board device 2) mounted on the vehicle 1, a first vehicle measurement device 3, and a second vehicle measurement device 10. is doing. The first vehicle measurement device 3 is installed near the entrance of a toll gate on a toll road such as an expressway. The second vehicle measurement device 10 is installed in the evacuation place PA, and the vehicle 1 determined to be abnormal by the first vehicle measurement device 3 is a measurement target. The evacuation place PA where the second vehicle measuring device 10 is installed is, for example, a predetermined place provided beside the main line through which a vehicle ahead of the toll gate passes in the vehicle traveling direction or a predetermined place in the next parking area. The place of the.

  The first vehicle measurement device 3 includes an ETC on-board unit (ETC) in which a metering control device 4, a vehicle measurement unit 5 installed in an entrance lane (ETC lane) of a toll gate, and an ETC control device 8 are mounted on the vehicle 1. A dedicated short range communication (DSRC) antenna 6, a vehicle separator 7, and a communication function of the ETC controller 8 that communicates with the ETC vehicle-mounted device 2. Composed. The vehicle separator 7 is configured using an optical sensor or the like, and detects the vehicle separately for each vehicle.

  Here, the DSRC antenna 6 and the ETC controller 8 are shared with the ETC system. The ETC system includes a DSRC antenna 6, an ETC control device 8, a start control rod 9, and the like. The ETC control device 8 performs wireless communication with the ETC on-board unit 2 via the DSRC antenna 6, receives predetermined information from the ETC on-board unit 2, and transmits information such as a toll to the ETC on-board unit 2. The ETC in-vehicle device 2 has a built-in speaker, and information such as a toll is output as a voice. Further, the ETC control device 8 controls opening and closing of the start control rod 9. The ETC vehicle-mounted device 2 includes a communication circuit as a communication means for wirelessly communicating with the ETC control device 8, a CPU as a control means, and a storage means for storing a CPU program and various data. A memory, the above-mentioned speaker as an audio output means, and the like are provided, and an ETC card is set. In the following, the ETC control device 8 will be described mainly regarding functions that contribute to the vehicle weighing system of the present embodiment.

As shown in FIG. 2A, the vehicle measurement unit 5 includes a left load measurement unit 5L and a right load measurement unit 5R arranged side by side in a direction perpendicular to the vehicle traveling direction (the direction indicated by the arrow 53). . The left-side load measuring unit 5L is provided with a rectangular left-side loading plate 51L on which the left wheel is placed and passed, and a predetermined interval (b, c) in the width direction and the traveling direction of the vehicle. A plurality of load cells LC1 to LC4 supporting 51L are provided. The load cells LC1 to LC4 are arranged so as to support the four corners of the square left-side loading plate 51L. Similarly, the right-side load measuring unit 5R is arranged with a rectangular right-side loading plate 51R through which the right-side wheel is placed and passed at predetermined intervals (b, c) in the width direction and the traveling direction of the vehicle. A plurality of load cells LC5 to LC8 that support the right loading plate 51R are provided. The load cells LC5 to LC8 are arranged so as to support the four corners of the square right-side loading plate 51R. In the left and right load measuring units 5L and 5R, the load cells LC3 and LC4 and the load cells LC5 and LC6 arranged on the adjacent sides of the two loading plates 51L and 51R are arranged with an interval S therebetween. Note that the intervals b, c, and S are distances between the centers of the load cells. The length of the loading plates 51L and 51R in the vehicle traveling direction is D. The vehicle measurement part 5 is installed so that the surface (upper surface) which contact | connects the tire of the two loading plates 51L and 51R may become the same height as the road surface 52. FIG. In FIG. 2 (a), the tire 1T _R tires 1T _L and the right wheel of the left wheels of the first shaft of the vehicle 1 (the forwardmost axle) is illustrated.

  The weighing control device 4 is constituted by, for example, a microprocessor (MPU), a memory, and the like, and receives load signals from the load cells LC1 to LC8 that are load sensors as shown in FIG. A vehicle detection signal is input. For example, digital load cells that amplify and A / D convert a load signal of an analog load cell and digitally output the load signals are used for the load cells LC1 to LC8.

  In addition, the weighing control device 4 is connected to the ETC control device 8 so as to be able to exchange necessary information with each other.

  The weighing control device 4 generates notification information (notification information) for notifying the driver of weight calculation means 4a, gravity center position calculation means 4b, weight abnormality determination means 4c, gravity center abnormality determination means 4d and abnormality information described later. It functions as the generating means 4e. Note that the weighing control device 4 is not necessarily constituted by a single control device, and a plurality of control devices are distributed and function so as to function as the weighing control device 4 in the present embodiment in cooperation with each other. It may be configured.

  In the ETC vehicle-mounted device 2 mounted on the vehicle 1, vehicle information such as the tread width and the inter-axis distance of the vehicle 1 is stored in advance in an internal memory. The ETC control device 8 functions as the communication means 8a in the present vehicle weighing system, receives vehicle information such as the tread width and the inter-axis distance of the vehicle 1 from the ETC vehicle-mounted device 2, and gives the information to the weighing control device 4. At the same time, the notification information given from the measurement control device 4 is transmitted to the ETC on-vehicle device 2.

  The vehicle 1 passes over the vehicle measuring unit 5 installed in the entrance lane of the toll gate. During this passage, the first vehicle measurement device 3 determines each wheel load, each axle load, the total vehicle weight, and the horizontal center of gravity position of the vehicle.

  FIG. 4 is a diagram showing an example of a vehicle to be measured in the present embodiment, FIG. 4 (a) is a plan view of the vehicle, and FIG. 4 (b) is a side view of the vehicle. is there. The vehicle 1 is a four-axis truck (the number of axles is four).

  FIG. 5 is a flowchart showing an example of the operation of the first vehicle measurement device 3. This operation is realized by the control of the weighing control device 4.

  When the measurement control device 4 inputs the detection signal of the vehicle 1 from the vehicle separator 7 (step S1), the wheels (tires) are placed on the loading plates 51L and 51R based on the load signals input from the load cells LC1 to LC8. (Step S2), if it is placed, the left and right wheel weights are calculated based on the load signal (Step S3), and the left and right wheel weights are summed to calculate the axial weight (Step S3). S4). In this way, each wheel load and each axle load are determined while the vehicle is being detected.

  In addition, when the measurement control device 4 inputs the detection signal of the vehicle 1 from the vehicle separator 7 (step S1), the ETC control device 8 passes through the DSRC antenna 6 until the vehicle 1 is no longer detected. The vehicle information received from the vessel 2 is acquired from the ETC control device 8. Therefore, an inquiry is made to the ETC control device 8 as to whether or not vehicle information has been received (step S6), and if received, vehicle information is acquired from the ETC control device 8 (step S7). Note that the ETC control device 8 gives vehicle information to the measurement control device 4 if vehicle information is received from the ETC on-vehicle device 2 in response to an inquiry from the measurement control device 4 (step S6). Moreover, if the measurement control apparatus 4 acquires vehicle information from the ETC control apparatus 8, after that, every time a wheel (tire) is placed on the loading plates 51L and 51R without performing the processes of steps S6 and S7, the step is performed. Assume that the processes of S3 and S4 are performed.

  In step S8, the weighing control device 4 calculates the total weight of the vehicle 1. Next, in step S9, the horizontal gravity center position of the vehicle 1 is calculated.

  Next, in step S10, abnormality determination processing is performed for each measurement value (wheel weight, axle weight, total vehicle weight, and horizontal center of gravity position of the vehicle). In this abnormality determination process, for example, it is determined whether or not each measurement value exceeds a threshold value determined for each, and if there is a measurement value that exceeds the threshold value, the measurement value is determined to be abnormal. If there is a measurement value determined to be abnormal, the process proceeds to step S12 (step S11).

  In step S12, notification information composed of abnormality information and information (remeasurement instruction information) indicating an instruction for remeasurement in the second vehicle measurement device 10 at the retreat place PA is generated, and the notification information is generated as an ETC control device. 8 is transmitted from the ETC control device 8 to the ETC vehicle-mounted device 2. The abnormality information is information indicating that the measurement value or the like is abnormal for the measurement value or the like determined to be abnormal in the abnormality determination process in step S10, and is information such as a gross weight violation (the vehicle total weight is abnormal). It is. For example, the ETC control device 8 is caused to transmit information to the ETC on-board unit 2 that the content is “violation of the total weight. Please re-weigh in the evacuation place 200m ahead”. To output. The first half “Total weight violation.” Is abnormal information, and the second half “Re-weigh in a evacuation place 200 m ahead” is re-measurement instruction information.

  In the above operation, steps S3, S4, and S8 are functions as the weight calculation means 4a of the weighing control device 4, step S9 is a function as the gravity center position calculation means 4b, and step S10 is the weight abnormality determination means 4c and This is a function as the gravity center abnormality determining means 4d.

  And the vehicle 1 which received the instruction | indication of step S12 progresses to the save place PA, and re-weighs in the 2nd vehicle measuring device 10. FIG.

  The second vehicle measurement device 10 is configured to acquire vehicle information (tread width, inter-axis distance, etc.) from the ETC vehicle-mounted device 2 as in the case of the first vehicle measurement device 3, for example. And while measuring each wheel weight of each vehicle 1, each axle weight, vehicle gross weight, a horizontal gravity center position, etc. more accurately than the 1st vehicle measuring device 3, about those measured values in the 1st vehicle measuring device 3. An abnormality determination process similar to that in step S10 is performed, and if there is an abnormal measurement value, abnormality information related to that is generated and notified to the driver. In this case, as in the case of the first vehicle measurement device 3, notification may be made by the ETC vehicle-mounted device 2, or may be displayed by a display device such as an electric display panel.

  The second vehicle measurement device 10 can measure each measurement value with higher accuracy than the first vehicle measurement device 3. The first vehicle measurement device 3 measures the vehicle 1 in the traveling state, while the second vehicle measurement device 10 measures the vehicle 1 in the stopped state. The second vehicle measurement device 10 may be configured such that, for example, all the tires of the vehicle 1 are placed on the loading plate, and each wheel load can be measured simultaneously. Further, as the second vehicle measurement device 10, for example, a device having the same configuration as that of the first vehicle measurement device 3 may be used. In this case, the left and right tires of the first to fourth axes of the vehicle 1 are sequentially placed on the left and right loading plates 51L and 51R (see FIG. 2), and the left and right tires of each axis are loaded on the left and right loading plates 51L. If the vehicle 1 is stopped and measured every time it is placed on the 51R, it can be measured with higher accuracy than the first vehicle measurement device 3 that measures the vehicle 1 in the running state. Moreover, it is more preferable if the 2nd vehicle measuring device 10 can calculate the gravity center position of a height direction in addition to the horizontal gravity center position of a vehicle.

[Calculation method of vehicle wheel load, axle load and total vehicle weight]
Next, a method for calculating the total vehicle weight and the like by the first vehicle measurement device 3 will be described in detail.

  First, a method for calculating each wheel weight, each axle weight, and the total vehicle weight of the vehicle 1 will be described.

For example, as shown in FIG. 4, in the case of a four-axis vehicle 1, the first axis (the foremost axle), the second axis, the third axis, and the fourth axis (the rearmost) in order from the front axle of the vehicle 1. Axle). The left wheel weight of the first shaft is W _1L , the right wheel weight is W _1R , the left wheel weight of the second shaft is W _2L , the right wheel weight is W _2R, and the left wheel weight of the third shaft is W _3L. The right wheel weight is W _3R , the left wheel weight of the fourth shaft is W _4L , and the right wheel weight is W _4R .

The weighing control device 4 adds the weight values indicated by the load signals input from the load cells LC1 to LC4 of the left load measuring unit 5L when the wheel of the first axis is placed on the loading plates 51L and 51R. calculating a left wheel load W _1L of the first axis, the right wheel load W _1R of the first shaft by summing the weight value indicated by each load signal input from load cell LC5~LC8 of the right load measuring unit 5R calculate. Similarly, the left wheel weight W _2L and the right wheel weight W _2R of the second shaft, the left wheel weight W _3L and the right wheel weight W _3R of the third shaft, the left wheel weight W _4L and the right wheel of the fourth shaft. The heavy W _4R is calculated.

Then, the axial weight W ₁ of the first axis, the axial weight W _{2 of} the second axis, the axial weight W ₃ of the third axis, and the axial weight W ₄ of the fourth axis are calculated based on the following equations, respectively.
W ₁ = W _1R + W _1L
W ₂ = W _2R + W _2L
W ₃ = W _3R + W _3L
W ₄ = W _4R + W _4L
Further calculates the gross vehicle weight W _T by the following equation.
W _T = W ₁ + W ₂ + W ₃ + W ₄
As described above, each wheel weight, each axle weight, and the total weight of the vehicle 1 can be calculated.

[Calculation method of horizontal center of gravity of vehicle]
Next, a method for calculating the horizontal center of gravity position of the vehicle 1 will be described. As the horizontal center-of-gravity position, a width direction (left-right direction) center-of-gravity position and a full-length direction (front-rear direction) center-of-gravity position of the entire vehicle are obtained.

For example, as shown in FIG. 4, the horizontal position of the center of gravity G of the entire vehicle is such that the full length direction (front-rear direction) of the vehicle 1 is the X-axis direction and the width direction (left-right direction) is the Y-axis direction. the value indicating the position of the center of gravity of the vehicle overall length direction position of the axle of the first axis as an origin (0) and X _G, Y axis represents the value indicating the position of the center of gravity of the vehicle width direction tread width center as the origin (0) Y _{As G} , X _G and Y _G are obtained.

<Determination of the center of gravity position Y _G in the vehicle width direction>
First, the sum W _R of the right wheel weight of the four axes of the vehicle 1 and the sum W _{L of the} left wheel weight are calculated by the following equations.
W _R = W _1R + W _2R + W _3R + W _4R
W _L = W _1L + W _2L + W _3L + W _4L
Next, as shown in FIG. 4 (a), the tread width is L _RL, if the right edge of the tread width the distance in the width direction to the center of gravity G and Y _R, Y _R is be represented by the following formula it can. The tread width L _RL is a value acquired from the ETC on-board device 2.

Y _R = L _RL · W _L / (W _R + W _L )
Accordingly, the center-of-gravity position Y _{G in} the width direction of the vehicle when the left side from the X-axis is a positive value can be expressed by the following expression, and the center-of-gravity position Y _G is calculated based on the expression.

Y _G = L _RL · W _L / (W _R + W _L ) −L _RL / 2
= L _RL [W _L / (W _R + W _L ) −1/2]
Y _G <0 when the center of gravity is on the right side of the center line (X axis) in the vehicle width direction, and Y _G > 0 when the center of gravity is on the left.

<How to find the center of gravity position X _G of the vehicle overall length direction>
As shown in FIG. 4B, the inter-axis distance between the first axis and the second axis is L ₁ , the inter-axis distance between the second axis and the third axis is L ₂ , and between the third axis and the fourth axis. the inter-axis distance and L _3. Here, the inter-axis distances L ₁ , L ₂ , and L ₃ are the inter-axis distances acquired from the ETC onboard device 3. L is the distance between the foremost axis (here, the first axis) and the last axis (here, the fourth axis), and is calculated from the equation L = L ₁ + L ₂ + L ₃ .

As shown in FIG. 4B, when the distance in the full length direction from the center position of the foremost axis (first axis) and the last axis (fourth axis) to the center of gravity G is a, the first axis is the origin. center-of-gravity position X _G of the vehicle overall length direction when a is expressed by the following equation (1).
X _G = a + (L / 2) (1)
From the formula of moment balance using the distance a, the inter-axis distances L ₁ , L ₂ , L ₃ and the previously calculated axial weights W ₁ , W ₂ , W ₃ , W ₄ as follows: The distance a can be calculated.

Therefore, to calculate the gravity center position X _G of the vehicle overall length direction using an equation obtained by substituting the a in equation (1).

In the above description, the measurement control device 4 determines the horizontal center of gravity position (Y _G , X _G ) of the vehicle using the tread width L _RL and the inter-axis distances L _{1 to} L ₃ acquired from the ETC onboard device 2. However, the horizontal center-of-gravity position of the vehicle may be obtained by the second calculation method of the vehicle horizontal center-of-gravity position described below. According to this calculation method, it is not necessary to acquire the tread width and the inter-axis distance from the ETC vehicle-mounted device 2.

[Second calculation method of vehicle horizontal center of gravity position]
<Determination of the center of gravity position Y _G in the vehicle width direction by the second calculation method>
With reference to FIGS. 6 and 2 illustrating another method of obtaining the center of gravity Y _G in the vehicle width direction. 6 is a diagram showing an example of a vehicle to be measured similar to FIG. 4, FIG. 6 (a) is a plan view of the vehicle, and FIG. 6 (b) is a side view of the vehicle. It is.

6, the same reference numerals as those in FIG. 4 are the same, and in FIG. 6A, G ₁ ,..., G ₄ are load gravity center positions of the first axis,. Indicates. Further, e ₁ ,..., E ₄ indicate the load gravity center positions (position coordinates) of the first axis,..., The fourth axis on the Y axis with the center of the tread width as the origin (0).

Each load cell LC1, · · ·, the reaction force of the LC8 (measurement _load), P _{1, ···,} and _{P 8.} Further, the total value of the load cell reaction forces, for example, the total value (P ₁ + P ₂ ) of the measured load P ₁ of the load cell LC ₁ and the measured load P ₂ of the load cell LC 2 is represented as P ₁₂ .

  The vehicle 1 shown in FIG. 6 shows a vehicle having four axles from the first axis to the fourth axis, but the number of axles is not limited to this. A vehicle having n axles up to the nth axis will be described. Further, the meanings of symbols used in the description are defined as follows (see FIGS. 2 and 6).

i: Axle number (i = 1, 2,..., n)
W _T : gross vehicle weight (= W ₁ + W ₂ +... + W _n )
W _i : Axis weight of the i-th axis W _iR : Right wheel weight of the i-th axis W _iL : Left wheel weight of the i-th axis B _i : Tread width of the i-th axis (distance between the center of the left and right wheels)
B _iR : Distance from right wheel of i-axis to i-th axis load center of gravity B _iL : Distance from left wheel of i-axis to i-th axis load center of gravity e _i : I-axis load center of gravity in Y-axis direction Position (position coordinates)
b _iR : distance in the vehicle width direction from the right tire tread to the center side load cell LC5 (LC6) b _iL : distance in the vehicle width direction from the left tire tread to the center side load cell LC3 (LC4) b: left and right load measuring units 5L , 5R Load cell center distance in the vehicle width direction S: Supports the left loading plate 51L and supports the center of the load cell LC3 (LC4) near the right loading plate 51R and the right loading plate 51R and closes to the left loading plate 51L Distance from the center of the load cell LC5 (LC6) (hereinafter center distance between load cells)
D: Length of the loading plates 51L and 51R in the vehicle traveling direction (hereinafter, the length of the loading plate in the vehicle traveling direction)
In the following description, the load cell reaction force P is not attached with the suffix (i) relating to the axle number, but is assumed to be a reaction force generated with respect to the wheel loads W _iR and W _iL of the i-th axis, respectively.

  Here, the load cell center distance b in the vehicle width direction in each load measuring unit 5L, 5R, the center side load cell center distance S, and the vehicle travel direction length D of the loading plate are determined in advance in the weighing control device 4. Stored in the memory.

First, the distance b _iR is obtained based on the formula of moment balance related to the right wheel load W _iR of the i-th axis. The formula of moment balance is
P ₅₆ b _iR = P ₇₈ (b−b _iR )
And the distance b _iR is
b _iR = b / (P ₅₆ / P ₇₈ +1)
And the distance b _iR is calculated from this equation.

Further, the distance b _iL is obtained based on the formula of moment balance related to the left wheel load W _iL of the i-th axis. The formula of moment balance is
P ₃₄ b _iL = P ₁₂ (b−b _iL )
And the distance b _iL is
b _iL = b / (P ₃₄ / P ₁₂ +1)
Then, the distance b _iL is calculated from this equation.

Next, the tread width B _i of the i-th axis is obtained by the following equation using the obtained distances b _iR and b _iL .
B _i = b _iR + b _iL + S
Here, the tread width B _i of the i-th axis is the distance between the center positions of the two-wheel tires in the case of a double tire, and the effective of the two-wheel tires in the case where the air pressures of the two-wheel tires are different. This is the distance between the load support points.

Next, determine the i-th axis load gravity center position _{e i.} Therefore, first, the i-axis of the left and right wheel load _{W iR,} the _{W iL} and axle load _{W i} is calculated by the following equation. These may be calculated in advance.
_{W iR = P 5 + P 6} + P 7 + P 8
_{W iL = P 1 + P 2} + P 3 + P 4
W _i = W _iR + W _iL
Then, a distance B _iR from the right wheel of the i-th axis to the i-th axis load gravity center position and a distance B _iL from the left wheel of the i-axis to the i-th axis load gravity center position are calculated by the following equations.
B _iR = B _i W _iL / W _i
B _iL = B _i W _iR / W _i
Here, if the center of gravity position Y _G finally obtained is, for example, the center of gravity position Y _G in the width direction in the above-described calculation method, the center of gravity position Y _G is on the right side of the center line (X axis) of the vehicle left-right width. _{When G} <0 and the center of gravity is on the left, Y _G > 0 is set. Therefore, for example, to calculate the i-th axis load gravity center position e _i by the following equation.
_{e i = B iR -B i /} 2
In this case, the _BiL need not be calculated.

It is also possible to calculate the i-th axis load gravity center position e _i by the following equation.
_{e i = B i / 2-} B iL
In this case, the _BiR may not be calculated.

Since the product of the center of gravity position Y _G in the vehicle width direction and the total vehicle weight (W _T ) is equal to the sum of the products of the i-th axis load center of gravity position e _i and the axle weight W _i for all axles, the gravity center position Y _G in the vehicle width direction can be calculated by the following equation.
Y _G = (e ₁ W ₁ + e ₂ W ₂ +... + E _n W _n ) / (W ₁ + W ₂ +... + W _n )
Above, if the calculated gross vehicle weight W _T, the center of gravity position Y _G can be calculated by the following equation.
Y _G = (e ₁ W ₁ + e ₂ W ₂ +... + E _n W _n ) / W _T
As described above, it may be obtained centroid position Y _G in the vehicle width direction. In this case, the weighing control device 4 includes the load signals of the load cells LC1 to LC8 of the left load measurement unit 5L and the left and right load measurement units 5L when the axles of the vehicle 1 pass over the loading plates 51L and 51R. , 5R based on the load cell center distance b in the vehicle width direction and the center load cell center distance S between the left and right load measuring units 5L, 5R, the load center of gravity (e _i ) of each axle is calculated, The center-of-gravity position Y _G in the vehicle width direction is calculated based on the load center-of-gravity position (e _i ) of each axle and the axle weight (W _i ) of each axle. Here, the calculation method of the load center of gravity (e _i ) of each axle is the load of the load cells LC1 to LC4 of the left load measuring unit 5L when an axle of the vehicle 1 passes over the loading plates 51L and 51R. Based on the signal and the load cell center distance b, the load position (b _iL ) in the width direction on the left loading plate 51L by the axle is obtained, and the load signals of the load cells LC5 to LC8 of the right load measuring unit 5R are obtained. The load position (b _iR ) in the width direction to the right loading plate 51R by the same axle is obtained, and the axle is determined based on these load positions (b _iL , b _iR ) and the center distance S between the center side load cells. calculating the tread width _{(B i),} calculate the left and right wheel load _{(W iL,} W _iR) of the same axle and the tread width _{(B i)} and the load center of gravity of the axle based on _{(e i)} It is way.

<Determination of the full-length direction gravity center position X _G for a vehicle according to the second calculation method>
Next, further with reference to FIG. 7 illustrates another method of obtaining the full-length direction gravity center position X _G of the vehicle. FIG. 7A shows a change over time of the load that the left loading plate 51L receives when the vehicle 1 passes over the loading plates 51L and 51R (that is, the total value of the loads indicated by the load signals from the load cells LC1 to LC4). FIG. The change with time of the load received by the right loading plate 51R (that is, the total value of the loads indicated by the load signals from the load cells LC5 to LC8) is the same. FIG. 7B shows a passing state of the left wheel (tire 1T _L ) of the first shaft on the left loading plate 51L when the first shaft of the vehicle 1 passes on the loading plates 51L and 51R. FIG.

In FIG. 7A, T _i (for example, T ₁ , T ₂ , T ₃ , T ₄ ) is an axle loading plate of the i-th axis (first axis, second axis, third axis, fourth axis). It is a passage time (a time for the axle to pass right above the loading plate 51L). Further, T _{i (i + 1)} (for example, T ₁₂ , T ₂₃ , T ₃₄ ) indicates that the i-th axle starts to pass immediately above the loading plate 51L, and the next (i + 1) -th axle is the loading plate 51L. It is the time until it starts to pass directly above. For example, T ₁₂ is the axle of the first axis is the time from the start of passing directly above the loading plate 51L until axle following the second shaft begins to pass directly above the loading plate 51L. Similarly, T ₂₃ is the axle of the second axis is the time from the start of passing directly above the loading plate 51L until axle next third axis starts to pass immediately above the loading plate 51L, T ₃₄ is This is the time from when the third axle starts to pass directly above the loading plate 51L until the next fourth axle starts to pass immediately above the loading plate 51L.

For example, the left wheel of the first shaft (tire 1T _L ) during the loading plate passage time T ₁ of the first shaft axle, as shown in FIG. 7B, is the tire 1T _L (t1) at time t1. Starts to be placed on the left loading plate 51L. Next, at time t2, the tire 1T _L (t2) is completely placed on the left loading plate 51L. Next, at time t3, the tire 1T _L (t3) starts to descend from the left loading plate 51L. At time t4, the tire 1T _L (t4) is completely lowered from the left loading plate 51L. This is the tire 1T _L because the ground plane occurs.

Here, when the tire 1T _L rests loading plate 51L has axles Ax1 of the first axis, to come to just above the loading plate 51L at the time (the time x1) between time t1 and time t2, the tire 1T _{When L} descends from the loading plate 51L, the axle Ax1 of the first shaft comes off from directly above the loading plate 51L at a time between time t3 and time t4 (time x2). In this example, when the left wheel of the first shaft (tire 1T _L) rests loading plate 51L, halved the load _{F 1} in the state resting completely loading plate 51L _(F 1/2) The time F is calculated as the above-mentioned time x1, and the load F when the left wheel of the first shaft (tire 1T _L ) is completely placed on the loading plate 51L when it gets off the loading plate 51L. seeking time when it becomes the _first half (F _1/2), it was with the time x2, it calculates the time from the time x1 to time x2 as loading plate passing time T ₁ of the first axis of the axle ing. The same applies to the loading plate passage times T ₂ , T ₃ , and T ₄ of the axles of the second axis, the third axis, and the fourth axis. For example, loading plate passing time T ₂ of the second axis of axles, half of the load F ₂ in the state left wheel of the second shaft is resting when resting on loading plate 51L, fully loading plate 51L ( from the time when it becomes the F _2/2), when the left wheel of the second shaft gets out loading plate 51L, the time until the time when it becomes the half of the load F ₂ (F _2/2) is there.

The loading plate passage times T ₁ , T ₂ , T ₃ , and T ₄ correspond to the vehicle traveling direction length D of the loading plate, respectively, and the times T ₁₂ , T ₂₃ , and T ₃₄ are the inter-axis distances L ₁ , L ₂ , respectively. , corresponding to the _{L 3.} The inter-axis distances L ₁ , L ₂ , and L ₃ are obtained by adding time ratios T ₁₂ / T ₁ , T ₂₃ / T ₂ , and T ₃₄ / T ₃ to the vehicle traveling direction length D of the loading plate as follows. Multiply and calculate.

L ₁ = D · T ₁₂ / T ₁
L ₂ = D · T ₂₃ / T ₂
L ₃ = D · T ₃₄ / T ₃
The change of the vehicle traveling speed becomes an error factor, the time T _i for each _axis, causing a practical acceptable error range because it calculates time T _i comprising the time T _{i (i + 1).}

Based on the distance between the axes obtained above and the axial weight of each axis measured when obtaining the center of gravity position in the width direction, the center of gravity position X _G in the vehicle full length direction is balanced with the moment based on the first axis. It is calculated by the following formula obtained from the formula:

X _G = {W ₂ L ₁ + W ₃ (L ₁ + L ₂ ) + W ₄ (L ₁ + L ₂ + L ₃ )} / W _T
If the number of axles is n, the inter-axis distance L _i between the i-th axis and the (i + 1) -th axis can be calculated by the following equation.

L _i = D · T _{i (i + 1)} / T _i (where i is 1 to n−1)
And the vehicle full length direction gravity center position _XG is computable by following Formula.

X _G = {W ₂ L ₁ + W ₃ (L ₁ + L ₂ ) + W ₄ (L ₁ + L ₂ + L ₃ )
+ ... + W _n (L ₁ + L ₂ + L ₃ +... + L _n−1 )} / W _T
In the above description, the load data of the load cells LC1 to LC4 of the left load measurement unit 5L is used, but the load data of the load cells LC5 to LC8 of the right load measurement unit 5R may be used instead. Or it becomes more accurate when it averages using the data of both the left side load measurement part 5L and the right side load measurement part 5R.

That is, in this case, the weighing control device 4 determines that each axle (Ax1, etc.) of the vehicle 1 is loaded on the loading plates 51L, 51R based on the load signal of at least one load cell of the left load measuring unit 5L and the right load measuring unit 5R. The loading plate passage time (T _{1 to} T ₄ ) required to pass above is obtained, and the next axle passes over the loading plates 51L and 51R from the time when a certain axle starts to pass over the loading plates 51L and 51R. The movement time (T ₁₂ , T ₂₃ , T ₃₄ ) until the start of the load is obtained, and each of the movement time is determined based on the loading plate passage time, the movement time, and the vehicle traveling direction length D (first length) of the loading plates 51L and 51R. An inter-axle distance (L ₁ , L ₂ , L ₃ ) between the axles is calculated, and a center-of-gravity position X _G in the full length direction of the vehicle 1 is calculated based on the inter-axis distance and each axle weight. The

In this case, the weighing control device 4 has a timer for measuring the loading plate passage times T _i and T _{i (i + 1)} .

According to the second calculation method described above, the weighing control device 4 can obtain the horizontal center-of-gravity position (Y _G , X _G ) can be calculated. Therefore, it is not necessary to store the tread width and the inter-axis distance of the vehicle 1 on which the ETC on-board device 2 is mounted. That is, the center-of-gravity position in the width direction and the full length direction of the vehicle can be calculated without using information on the tread width and the inter-axis distance of the vehicle.

[Abnormality judgment processing]
After calculating each measurement value, the weighing control device 4 performs an abnormality determination process (step S10). In this abnormality determination process, for example, a threshold value for determining that each measurement value is abnormal is determined in advance. For each threshold, a limit value defined by law is used. For example, 5t for wheel load, 10t for axle load, and 30t for total vehicle weight are set as threshold values. Judged to be abnormal.

As for the horizontal center of gravity position (Y _G , X _G ) of the vehicle, when | Y _G | / (L _RL / 2) exceeds a threshold value (for example, 10%), the center of gravity position (Y _G ) in the width direction is Judged to be abnormal. More specifically, when | Y _G | / (L _RL / 2) exceeds a threshold value (for example, 10%) and Y _G > 0, it is determined that the center of gravity is excessively biased to the left, and Y _{When G} <0, it is determined that the center of gravity is too biased to the right. When the width direction gravity center position (Y _G ) is calculated by the second calculation method described above, for example, instead of the tread width L _RL , for example, the average of the tread width (B _i ) for all axles. What is necessary is just to calculate and use a value.

When | X _G − (L / 2) | / (L / 2) exceeds a threshold value (for example, 10%), it is determined that the full-length direction gravity center position (X _G ) is abnormal. More specifically, when | X _G − (L / 2) | / (L / 2) exceeds a threshold (for example, 10%), and X _G − (L / 2)> 0, the center of gravity is It is determined that the back is too biased, and when X _G − (L / 2) <0, it is determined that the center of gravity is too biased forward. Note that L is a distance between the foremost axis and the last axis (in the case of the vehicle 1 having four axles, L = L ₁ + L ₂ + L ₃ ).

However, the determination of the horizontal center of gravity position (Y _G , X _G ) is determined in advance when the total vehicle weight is light (for example, when there is an empty load), since the risk of the vehicle rollover is low. The determination may be made only when the weight exceeds a predetermined weight.

After performing the abnormality determination process as described above, the weighing control device 4 generates notification information for notifying the driver of what is determined to be abnormal (function as the notification information generation unit 4e). Here, abnormality information and remeasurement instruction information are generated as notification information. Specifically, as described above, when it is determined that the total vehicle weight is abnormal, for example, abnormality information having a content of “total weight violation” is generated. Further, if it is determined that the wheel load on the left side (or right side) of the x-axis (x is an integer) is abnormal, for example, “the wheel load violation on the left side (or right side) of the x-axis” is indicated. If the abnormal information of the content is generated and it is determined that the x-axis axis weight is abnormal, for example, the abnormal information of the content “Axial load violation of the x-th axis” is generated. Also, if it is determined that the center of gravity (Y _G ) in the width direction of the vehicle is abnormal and the center of gravity is determined to be too biased to the left (or right), for example, “The load is offset to the left (or right) , Pay attention to the right (or left) curve. ”, The center of gravity (X _G ) in the width direction of the vehicle is abnormal, and the center of gravity is too biased forward (or back). If it is determined that there is, for example, the abnormal information with the content “the cargo is shifted forward (or rearward)” is generated.

  In addition, when the measurement control device 4 generates the abnormality information as described above, for example, as described above, the measurement control device 4 also generates remeasurement instruction information with the content “Please remeasure at a sheltered place 200 m ahead”.

  These abnormality information and re-measurement instruction information are stored in advance in a memory inside the measurement control device 4, and the measurement control device 4 extracts the corresponding abnormality information based on the result of the abnormality determination process, Notification information is generated using the stored re-measurement instruction information, and this notification information is given to the ETC control device 8 so as to be transmitted from the ETC control device 8 to the ETC vehicle-mounted device 2. In the ETC on-board unit 2, the notification information is output from a built-in speaker together with, for example, information in the ETC system (information indicating that traffic is allowed and information on tolls).

  In the present embodiment, the first vehicle measurement device 3 measures the total weight, axle load, wheel load, and horizontal barycentric position of the vehicle 1 in a traveling state without stopping the vehicle 1, and these measured values are obtained. It is determined whether or not there is an abnormality, and when it is abnormal, the abnormality information is transmitted to the ETC on-vehicle device 2 and information indicating that the abnormality is output from the ETC on-vehicle device 2 is output as a voice. Abnormal information can be transmitted reliably. Also, as indicated by the abnormal information described above, what measurement values are abnormal, such as which wheel load is abnormal, which axle weight is abnormal, or the total weight is abnormal And how abnormal the position of the center of gravity of the vehicle is, which is useful for safe driving operation for the driver.

  Further, since the remeasurement instruction information is also transmitted together with the abnormality information, the driver can obtain more accurate information by performing remeasurement with the second vehicle measurement device 10 having higher accuracy than the first vehicle measurement device 3. It is done. In addition, it is possible to check the load at the evacuation place PA where the second vehicle measurement device 10 is installed, and to contribute to safe driving thereafter. For example, it is possible to take measures to drop the load by reloading the load when the load is shifted to the front, back, left or right, or increasing the number of ropes when the load is fixed with a rope. .

In the present embodiment, the weighing control device 4 is a ratio (R) of the distance (X _G ) from the first axis to the center of gravity in the vehicle full length direction relative to the total length (L) from the first axis to the last axis of the vehicle 1. This may also be notified to the driver by voice output from the ETC vehicle-mounted device 2 as notification information. The ratio R is calculated by the following formula.

R = X _G / L (in the case of the vehicle 1 with 4 axles, L = L ₁ + L ₂ + L ₃ )
For example, when the ratio R is 2/5, information indicating that the center of gravity of the vehicle is at a position 2/5 from the first axis to the last axis (here, the fourth axis) is notified information. Is generated and transmitted to the ETC on-board unit 2 to output the sound. In this case, a predetermined form of the center of gravity position information is stored in advance in the memory inside the weighing control device 4, and for example, “the center of gravity of the vehicle is 2/5 from the front”. The center-of-gravity position information is generated as notification information, and this notification information is given to the ETC control device 8 to be transmitted from the ETC control device 8 to the ETC in-vehicle device 2. Notifying the driver of such information enables the driver to sensuously grasp the position of the center of gravity of the vehicle (the center of gravity in the full length direction), which is significant for the driver in terms of safe driving.

  In the present embodiment, a configuration in which the second vehicle measurement device 10 is not provided in the retreat place PA may be employed. In this case, in step S12, the weighing control device 4 generates guidance information for the evacuation place instead of the remeasurement instruction information, and transmits it to the ETC on-vehicle device 2 together with the abnormality information so as to output the sound. Good. Here, the guide information of the shelter location is information such as “Please check the cargo at the shelter location 200 m ahead”. This information may also be stored in advance in the internal memory of the metering control device 4 and used as notification information as necessary. In this case, the driver can stop the vehicle 1 at the evacuation place PA, inspect the cargo, and contribute to safe driving thereafter.

  In the present embodiment, as the first vehicle measurement device 3, the vehicle measurement unit 5 having the left load measurement unit 5L and the right load measurement unit 5R on which the left and right wheels of one axle of the vehicle 1 are separately mounted is used. However, you may use vehicle measurement part 5A, 5B as each shown to FIG. 8 (a), (b).

  The vehicle measurement unit 5A shown in FIG. 8A is arranged with a rectangular loading plate 51A through which the left and right wheels of each axle of the vehicle 1 are placed and passed at predetermined intervals in the width direction and the traveling direction of the vehicle. And a plurality of load cells LC11 to LC14 that support the loading plate 51A. The load cells LC11 to LC14 are arranged so as to support the four corners of the rectangular loading plate 51A. In this case, the axle weight of the axle is calculated by summing the weight values indicated by the load signals of all the load cells LC11 to LC14 when one axle passes on the loading plate 51A. Each time each axle passes on the loading plate 51A, the axle weight is calculated in the same manner. As described above, the center of gravity position in the full length direction of the vehicle can be calculated from each axle load and the inter-axis distance.

  Further, the vehicle measurement unit 5B shown in FIG. 8B is arranged with a rectangular loading plate 51B on which all the wheels of the vehicle 1 can be mounted simultaneously, with predetermined intervals in the width direction and the traveling direction of the vehicle. And a plurality of load cells LC21 to LC24 that support the loading plate 51B. The load cells LC21 to LC24 are arranged so as to support the four corners of the rectangular loading plate 51B. In this case, when only the first axis of the vehicle 1 traveling in the direction of the arrow 53 is placed on the loading plate 51B, the weight values indicated by the load signals of all the load cells LC21 to LC24 are summed up. The axial weight of one axis is calculated. Next, when the second shaft is placed on the loading plate 51B, the weight values indicated by the load signals of all the load cells LC21 to LC24 are summed to obtain the sum of the shaft weights of the first shaft and the second shaft. Calculated. The axial weight of the second axis is calculated by subtracting the axial weight of the first axis calculated previously from the total axial weight of the first axis and the second axis. Thereafter, the axle weight of each axle is calculated in the same manner. As described above, the center of gravity position in the full length direction of the vehicle can be calculated from each axle load and the inter-axis distance. Note that three or more load cells (LC21, LC22) on the left side and load cells (LC23, LC24) on the left side with respect to the traveling direction of the vehicle 1 may be provided.

Further, using the method disclosed in Japanese Patent Application Laid-Open No. 2006-3291 (hereinafter referred to as “Document A”), the amount of deviation of the approach position of the vehicle 1 relative to the loading plate 51B (the vehicle 1 is compared with the loading plate 51B). determine the shift amount) Le of the left-right direction center of the vehicle 1 and the left-right direction center of the loading plate 51B at the time of entry, the amount of deviation Le, the tread width (right and left wheels distance) and L _RL, the right and left load cell From the center distance Lb, the total load of the left load cells LC21 and LC22 for each axle, and the total load of the right load cells LC23 and LC24 for each axle, the left and right wheel loads of each axle can be calculated. As described above, the center of gravity position in the vehicle width direction can be calculated from the calculated wheel weights and the tread width _LRL . Further, in the case of the vehicle measurement unit 5A shown in FIG. 8A, it is possible to calculate each wheel weight and the center of gravity position in the vehicle width direction in the same manner.

  The amount Le of the approach position of the vehicle 1 may be calculated from the distance measured by the ultrasonic distance meter 55 as disclosed in the document A, or the loading plates 51A and 51B. A camera may be attached to the front upper part, and an image captured by the camera may be processed and calculated. The left and right wheel load values on the first axis of the vehicle 1 are the same, and the wheel load on the first axis is the same. You may make it calculate by a calculation from a value. Further, when calculating the deviation amount Le of the approach position of the vehicle 1 from the distance measured by the ultrasonic distance meter 55 described above, or by processing the image captured by the camera, the deviation amount of the entry position of the vehicle 1 When calculating Le, as also disclosed in Document A, the tread width (the distance between the left and right wheels) may also be calculated. Further, instead of the ultrasonic distance meter 55, for example, a laser distance meter may be used.

  In addition, when using the vehicle measurement part 5B which can mount all the wheels of the vehicle 1 simultaneously as shown in FIG.8 (b), after a preceding vehicle gets off completely from the loading board 51B, It is necessary to allow each vehicle to have a sufficient inter-vehicle distance so as to be placed on the loading plate 51B.

  Moreover, in the said embodiment, the ETC onboard equipment 2 may be what was built in the car navigation (car navigation system) mounted in the vehicle 1, or interlocked with the car navigation mounted on the vehicle 1. . In this case, in the above description, all notification information generated by the weighing control device 4 and output from the ETC onboard device 2 may be notified from the car navigation system.

  In this case, the notification information may be displayed on the display screen of the car navigation in addition to outputting the notification information from the car navigation. For example, a vehicle plan view in which a vehicle having wheels and an axle is schematically displayed on the display screen of the car navigation system is displayed. In this vehicle plan view, the color of the wheel whose wheel load is determined to be abnormal is determined to be abnormal. The wheels that are judged to be abnormal can be distinguished from other wheels by displaying them differently from the colors of the other wheels that are not, or by blinking the wheels that are judged to be abnormal. It is also possible to notify a wheel whose wheel load is determined to be abnormal by performing (differentiated display). Similarly, in the above-described vehicle plan view, the axle color for which the axle load is determined to be abnormal is displayed differently from the colors of other axles that are not determined to be abnormal, or the axle load is determined to be abnormal. The axle whose weight is determined to be abnormal can be displayed by distinguishing it from other axles by blinking the axle, etc. May be. By looking at the vehicle plan view displayed in this way, the driver can easily recognize the wheels and axles that are determined to be abnormal. In addition, when the total vehicle weight is abnormal, it may be displayed, for example, with characters (for example, “overweight”). Similarly, when the wheel load and the axle load are abnormal, a message to that effect may be displayed.

  In addition, if the position of the center of gravity in the width direction of the vehicle is abnormal, that fact may be displayed as, for example, characters such as “right-side biased load, left curve caution”, “left-side biased load, right curve caution”, etc. If the position of the center of gravity of the vehicle in the full length direction is abnormal, the fact may be displayed as, for example, characters such as “frontal offset load”, “rearward offset load”, or the like. Further, when the center of gravity position in the width direction and / or the full length direction of the vehicle is abnormal, the position of the center of gravity may be displayed on the vehicle plan view as, for example, the center of gravity G shown in FIG.

  Notification information other than the abnormal information as described above, for example, remeasurement instruction information, barycentric position information, and guidance information for a shelter location may also be displayed on the display screen of the car navigation system using, for example, characters. The voice output may be performed by the car navigation as described above, or may be performed by the ETC on-vehicle device 2. Further, the installation location of the second vehicle measurement device 10 may be guided to the car navigation system. As described above, it is possible to provide information more reliably and in a user-friendly manner by adopting the ETC in-vehicle device that is built in or interlocked with the car navigation system.

  The present invention uses a toll road vehicle weighing system capable of reliably transmitting information relating to a vehicle weight abnormality, such as a gross weight violation, to the driver, and information on the tread width and the inter-axis distance of the vehicle. A toll road that realizes a vehicle measurement device that can calculate the center of gravity position in the width direction and the full length direction of the vehicle without using it, and that can be used to generate information on the center of gravity position abnormality and reliably transmit it to the driver It is useful as a vehicle weighing system.

PA Resting place LC1 to LC8 Load cell 1 Vehicle 2 ETC onboard equipment 3 First vehicle measuring device 4 Weighing control device 5 Vehicle measuring unit 5L Left load measuring unit 5R Right load measuring unit 51L Left loading plate 51R Right loading plate 6 DSRC antenna 7 Vehicle separator 8 ETC controller 10 Second vehicle measuring device

Claims (8)

Installed in the entrance lane of the toll gate on the toll road, calculate each axle weight and total weight of the vehicle in the running state, and whether or not each calculated axle weight and total weight is abnormal based on each threshold value And when the determination result is abnormal, a first vehicle measurement device configured to transmit information indicating the abnormality to the ETC on-vehicle device mounted on the vehicle;
A toll road vehicle weighing system comprising: the ETC vehicle-mounted device mounted on the vehicle and configured to output information transmitted from the first vehicle measurement device by voice. A second vehicle measuring device that is installed in a retreat place provided in front of the toll gate in the vehicle traveling direction and that calculates each axle weight and total weight of the vehicle with higher accuracy than the first vehicle measuring device; Prepared,
The first vehicle measurement device also includes information indicating an instruction to perform re-measurement by the second vehicle measurement device when any of the calculated determination results of each axle weight and total weight is abnormal. The toll road vehicle weighing system according to claim 1, configured to transmit to an in-vehicle device. The first vehicle measurement device further includes:
Calculate at least one of the center-of-gravity position in the width direction and the center-of-gravity position in the full-length direction of the vehicle, and determine whether the calculated center-of-gravity position is abnormal based on a predetermined criterion. The toll road vehicle weighing system according to claim 1, wherein when the result is abnormal, information indicating the abnormality is also transmitted to the ETC on-vehicle device. The vehicle is installed in a retreat place ahead of the toll gate in the vehicle traveling direction, and has a higher accuracy than the first vehicle measuring device, and the center weight position and the total length of the vehicle in the axial direction and the total weight, and the vehicle width direction. A second vehicle measuring device that calculates at least one of the centroid positions in the direction,
The first vehicle measurement device is an information indicating an instruction to re-measure by the second vehicle measurement device when any of the calculated determination results of the respective axial weights, total weights, and barycentric positions is abnormal. 4. The toll road vehicle weighing system according to claim 3, wherein the vehicle weighing system is configured to transmit to the ETC vehicle-mounted device.   The first vehicle measuring device moves from the toll gate to a evacuation place forward in the vehicle traveling direction when any of the calculated determination results of each axle weight, total weight, and center of gravity is abnormal. The toll road vehicle weighing system according to claim 3, wherein the guidance information is also transmitted to the ETC on-board device. The first vehicle measurement device further includes:
The ratio of the distance from the foremost axle of the vehicle to the center of gravity in the full length direction of the vehicle relative to the distance from the foremost axle to the rearmost axle of the vehicle is calculated as a relative center of gravity position. The toll road vehicle weighing system according to claim 3, configured to transmit information indicating the position of the center of gravity to the ETC vehicle-mounted device. The ETC OBE is
Information on the tread width of the vehicle on which the vehicle is mounted and the distance between the axles is stored in advance, and the stored information is configured to be transmitted to the first vehicle measurement device,
The first vehicle measurement device includes:
Each wheel weight of the vehicle is configured to be calculated, information on the tread width of the vehicle and the inter-axis distance between the axles transmitted from the ETC on-vehicle device, each wheel weight calculated and each The toll road vehicle weighing system according to claim 3, configured to calculate a center-of-gravity position in a width direction and a center-of-gravity position in a full length direction of the vehicle based on an axle load. The first vehicle measurement device includes:
A left load measurement unit through which the left wheels of the vehicle sequentially pass; a right load measurement unit through which the right wheels of the vehicle sequentially pass; and a gravity center position calculating means;
Each of the left load measurement unit and the right load measurement unit is
A loading plate having a first length in the traveling direction of the vehicle, through which one of the left and right wheels of the vehicle passes;
A plurality of load sensors arranged at a first interval in the width direction of the vehicle and supporting both ends of the load plate in the width direction;
The loading plate of the left load measurement unit and the loading plate of the right load measurement unit are arranged at predetermined positions side by side in the width direction,
The barycentric position calculating means includes
Based on the load signals of the plurality of load sensors of the left and right load measuring units and the first interval when each axle of the vehicle passes on the load plate, the load gravity center position of each axle is determined. And is configured to calculate the center of gravity position in the width direction of the vehicle based on the load center of gravity position of each axle and the axle weight of each axle,
When the time required for each of the axles of the vehicle to pass on the loading plate is obtained based on the load signal of the load sensor, and any one of the axles starts to pass on the loading plate To determine the travel time until the next axle starts to pass on the load plate, and the inter-axis distance between adjacent axles based on the transit time, the travel time, and the first length of the load plate 4. The toll road vehicle weighing system according to claim 3, wherein the center-of-gravity position in the full length direction of the vehicle is calculated based on the calculated inter-axis distance and each axle weight.

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