JP4742742B2 - Axial load measuring system and axial load measuring method - Google Patents

Description

  The present invention relates to an axle weight measuring system and an axle weight measuring method for measuring the axle weight of a traveling vehicle using an axle weight sensor disposed on a road surface.

  In order to preserve the structure of the road or prevent traffic hazards, the Road Law (Act No. 180 of 1927) restricts the width, weight, height, and length of vehicles to a certain range. Anything that exceeds the maximum limit shall not be allowed to pass through the road without permission from the road administrator (Minister of Land, Infrastructure, Transport and Tourism or prefecture). The specific maximum value is stipulated in the Vehicle Restriction Ordinance. Therefore, a system that measures the weight, dimensions, etc. of a traveling vehicle has been used in the past in order to control vehicles that violate laws and regulations that are unauthorized due to excess weight.

As a system for measuring the weight of a traveling vehicle, an axle weight measurement system is known in which an axle weight sensor is embedded in a road surface and the total weight of the vehicle is measured based on the axle weight obtained from the axle weight sensor. The axle load sensor is a sensor that detects a load in the vertical direction that the axle of the traveling vehicle applies to the road surface, that is, an axle load, and is composed of a rod-like sensor including a piezoelectric element such as a crystal. The following Patent Document 1 describes an example of an axle load measuring system using an axle weight sensor.
JP 2001-101568 A

In the axle load measurement system as described above, the axle load sensor consists pair of sensors, summing them and Shigeru Hanawa of Shigeru Hanawa and the right wheel of the left wheel of the vehicle is detected separately by each sensor This is to measure the axial load. Moreover, the measurement of axle load is performed independently for each lane. For this reason, when an overweight vehicle intentionally travels across adjacent lanes in order to escape control, each lane can only obtain output from either the left or right sensor , and the vehicle weight measurement value. However, there is a problem that an overweight vehicle cannot be detected. Such travel over adjacent lanes is very dangerous because it is very dangerous because it is likely to cause a contact accident with other vehicles, and it is indispensable from the viewpoint of ensuring safety.

  In addition, although the said patent document 1 has description about the detection of a straddling vehicle, in this literature, a straddle vehicle cannot be detected only with an axle load sensor, but a straddle vehicle is detected separately from an axle load sensor. This requires a detection means (such as a light beam sensor) to increase the cost.

An object of the present invention is to enable accurate detection of straddling travel even when an overweight vehicle travels across an adjacent lane in order to escape control. Another object of the present invention is to enable detection of a straddling vehicle using an existing axle load measurement system.

An axle load measurement system according to the present invention is provided on each road surface of a plurality of lanes, and determines the axle weight of a traveling vehicle based on the detection output of an axle load sensor composed of a pair of left and right sensors for left and right wheels. a axle load measuring system for measuring the axle load sensors deployed first lane, the axle load sensors deployed second lane adjacent the first lane, based on the detection output of the axle load sensor running vehicle is provided with a judging means for judging whether or not astride the first lane and the second lane. Of the pair of left and right sensors constituting the axle load sensor arranged in the first lane, the determination means includes the first sensor on the side close to the second lane and the axle left and right sensors constituting the axle load sensor arranged in the second lane. Among the pair of sensors , the second sensor on the side closer to the first lane can obtain a detection output almost simultaneously, and among the pair of left and right sensors constituting the axle load sensor arranged in the first lane , Detection output is obtained from at least one of the third sensor far from the second lane and the fourth sensor far from the first lane among the pair of left and right sensors constituting the axle load sensor arranged in the second lane. If not, it is determined that the traveling vehicle straddles the first lane and the second lane .

Further, the axle load measuring method according to the present invention is arranged on the road surface of each of the plurality of lanes, and the axis of the traveling vehicle is based on the detection output of the axle load sensor composed of a pair of left and right sensors for the left wheel and the right wheel. a axle load measuring method for measuring the weight, of the pair of sensors constituting the axle load sensors deployed first lane, the first sensor side closer to the second lane, are deployed in the second lane pair of left and right sensors constituting the axle load sensor, axle load and a second sensor on the side close to the first lane, which substantially determines whether or not the detected output at the same time is obtained, which is deployed in the first lane pair of left and right sensors of the sensor, the third sensor farther from the second lane, of the pair of sensors constituting the axle load sensors deployed second lane, far from the first lane detection output from at least one of the fourth sensor is such obtained Whether determined, substantially the detection output is obtained at the same time from the first sensor and the second sensor, and, when the detection output from at least one of the third sensor and the fourth sensor is not obtained, the travel vehicle it is determined that spans the first lane and the second lane.

In the present invention, deployed in each of the two lanes adjacent monitors the state of the axle load sensor comprising a left and right pair sensor, or substantially simultaneously detected output from the side of the sensor close to the other lane is obtained No, and whether or not detection output was obtained from both or one of the sensors far from the other lane, even if an overweight vehicle travels across the adjacent lane, Can be detected . In addition, since it is possible to detect straddling travel according to a predetermined algorithm from the output state of the axle load sensor, there is no need to provide a detecting means for detecting a vehicle straddling separately from the axle load sensor, and an existing axle load measuring system is used. Can be realized easily.

In the present invention, the sensor of the left and right pair constituting each axle load sensors deployed on each lane, each Ri plurality of sensors Tona arranged at predetermined intervals in the traveling direction of the vehicle, determining means, among the plurality of sensors, when sensors detect the pattern are the same comprising a pair of right and left detection state is more than a predetermined number, employ the detection output of the sensor, it is determined crossing based on the detection output of employing . As a result, even if an irregular pattern occurs in the detection pattern of the sensor in each lane for a vehicle moving from one lane to the next lane, for example, if the detection patterns of a majority of the sensors are the same, those adopted detection output of the sensor, by ignoring the detection output of the other sensors, it is possible to determine the crossing accurately.

  The axle load measuring system according to the present invention displays a warning together with the reading unit reading the license plate information of the traveling vehicle and the traveling plate determined by the determination unit as being straddled together with the license plate information read by the reading unit. It may be further provided with display means. The warning may be an overweight warning, a straddle warning, or both warnings. According to this, it is possible to suppress malicious travel by letting the driver know that it is useless even if straddling to escape control.

  Further, the axle load measuring system of the present invention includes a reading unit that reads the license plate information of the traveling vehicle, and a recording unit that records the license plate information read by the reading unit with respect to the traveling vehicle determined to stride. Further, it may be provided. According to this, it is possible to strengthen the control of straddling travel by accumulating the license plate information of the straddling travel vehicle and making it a so-called black list.

According to the present invention, even when an overweight vehicle travels over an adjacent lane in order to escape control, it is possible to accurately detect straddling travel. It can contribute to securing. Further, it can be easily realized by using an existing axle load measuring system.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an example of an axle load measuring system 100 according to the present invention. Here, the road which has the lane 1 and the lane 2 as a one side multiple lane is mentioned as an example.

In the lane 1, 10 is a vehicle traveling in the direction of the arrow, 11 is an axle weight sensor that detects the axle weight of the vehicle 10, and 12 and 13 are loop coils for detecting the vehicle 10. The axial load sensor 11 and the loop coils 12 and 13 are both embedded in the road surface. The inductance of the loop coils 12 and 13 changes when the vehicle 10 passes over them, and the vehicle 10 is detected based on the change in inductance. Axle weight sensor 11, be composed of rod-shaped sensor having a piezoelectric element, and arranging a plurality at predetermined intervals in the traveling direction of the vehicle 10, each of the axle load sensor consists of a pair of right and left sensors. When the axle weight of the vehicle 10 is applied to the axle weight sensor 11, a current proportional to the axle weight is output from the axle weight sensor 11. Reference numeral 14 denotes an axle weight measuring unit that measures the axle weight of the traveling vehicle from the detection output of the axle weight sensor 11.

  In the lane 2, 21 is an axle load sensor, 22 and 23 are vehicle detection loop coils, and 24 is an axle load measurement unit that measures the axle load of a traveling vehicle from the detection output of the axle load sensor 21. These are the same as the axle load sensor 11, the loop coils 12 and 13, and the axle load measuring unit 14 of the lane 1.

  15 determines whether or not the traveling vehicle straddles the lane 1 and the lane 2 based on the measurement results of the axle load measuring units 14 and 24, and calculates the total weight of the straddling traveling vehicle. It is the roadside control part to perform. The axle load measuring units 14 and 24 and the roadside controller 15 are provided in the vicinity of the axle load sensors 11 and 21 and the loop coils 12, 13, 22, and 23. The axle load measuring units 14 and 24 and the roadside control unit 15 may be separate units or may be housed together in the same unit. Reference numeral 16 denotes a host device composed of, for example, a simple server, and is installed in a management office in another place away from the axle load measuring units 14 and 24 and the roadside control unit 15. The roadside control unit 15 transmits predetermined data to the host device 16.

  Reference numerals 17 and 27 denote cameras for picking up images of the traveling vehicle, which are arranged above the loop coils 13 and 23. The cameras 17 and 27 constitute one embodiment of the reading means in the present invention. Reference numerals 18 and 28 are display boards each composed of an LED display for displaying a warning to the traveling vehicle, and are arranged overhead several hundred meters from the cameras 17 and 27. The display boards 18 and 28 constitute an embodiment of the display means in the present invention. Outputs of the cameras 17 and 27 are given to the roadside control unit 15, and the display boards 18 and 28 are controlled by the roadside control unit 15.

  FIG. 2 is a block diagram showing an electrical configuration of the axle load measuring unit 14. Since this configuration is the same for the axial load measuring unit 24, the block diagram of the axial load measuring unit 24 is not shown. In FIG. 2, 141 is a vehicle detection unit that detects a vehicle based on changes in the inductance of the loop coils 12 and 13, 142 is a converter that converts the current output from the axle load sensor 11 into a voltage, and performs amplification and A / D conversion. 143 is a timing circuit that counts the current time, 144 is a communication unit that communicates with the roadside control unit 15, 145 is a storage unit that includes a memory such as a ROM or a RAM, and 146 is an entire unit. A CPU that controls the operation. When the axle load sensor 11 detects the axle load, the axle load data A / D converted by the signal converter 142 is passed to the CPU 146, the time measured by the timer circuit 143, and the vehicle information obtained by the vehicle detector 141. At the same time, it is stored in the storage unit 145. The communication unit 144 transmits data such as axle load stored in the storage unit 145 to the roadside control unit 15. The axle load measuring units 14 and 24 constitute an embodiment of the axle load measuring means in the present invention.

  FIG. 3 is a block diagram showing an electrical configuration of the roadside control unit 15. Reference numeral 151 denotes a data processing unit that processes data sent from the axial load measuring units 14 and 24 and the cameras 17 and 27, and includes a microcomputer, an image processing circuit, and the like. Reference numeral 152 denotes a display control unit that controls display on the display boards 18 and 28, 153 denotes a communication unit that communicates with the host device 16, and 154 denotes a storage unit that includes a memory such as a ROM or a RAM. The data processing unit 151 determines whether or not the traveling vehicle straddles the lane 1 and the lane 2 according to a predetermined algorithm based on the measurement result of the axle load in the axle load measuring units 14 and 24, and the measurement. The total weight of the traveling vehicle is calculated based on the result. The data processing unit 151 processes the license plate information image of the vehicle captured by the cameras 17 and 27. This data processing unit 151 constitutes an embodiment of the determining means and calculating means in the present invention. The display control unit 152 creates a predetermined warning message based on the determination result of the crossing presence / absence in the data processing unit 151 and the calculation result of the vehicle weight, and transmits this to the display plates 18 and 28 together with the vehicle license plate information. To do. The communication unit 153 transmits the weight, license plate information, and the like of the vehicle determined to be straddled by the data processing unit 151 to the higher-level device 16. The storage unit 154 stores determination results and calculation results in the data processing unit 151, license plate information, and the like.

  FIG. 4 is a block diagram showing the electrical configuration of the host device 16. The host device 16 is configured as a simple server. 161 is a communication unit that communicates with the roadside control unit 15, 162 is a storage unit that stores data received from the roadside control unit 15, 163 is a data file provided in the storage unit 162, and 164 displays the received data. A monitor 165 such as a liquid crystal display is a warning light that is lit when there is an excess weight or straddling. In the data file 163, license plate information, weight data, and the like of these vehicles are accumulated for overweight vehicles and straddling vehicles. This data file 163 constitutes one embodiment of the recording means in the present invention.

Next, the stride determination method in the present invention will be described with some types. FIG. 5 is a diagram illustrating the basic principle of the stride determination. Here, for the sake of convenience, the arrangement direction of the axial load sensors 11 and 21 is defined as the vertical direction. As described above, the axle load sensors 11 and 21 include a plurality of sensors (four in this case, a to d) arranged at a predetermined interval in the traveling direction of the vehicle. It consists of a pair of sensors. 11L is a sensor for the left wheel deployed to the left of the lane 1, for detecting the wheel load of the left wheel of the vehicle traveling lane 1. 11R is a sensor for the right wheel provided on the right side of the lane 1 and detects the wheel weight of the right wheel of the vehicle traveling on the lane 1. 21L is a sensor for the left wheel deployed on the left side of the lane 2, it detects the wheel load of the left wheel of the vehicle traveling lane 2. 21R is a sensor for the right wheel deployed on the right side of the lane 2, it detects the wheel load of the right wheel of the vehicle traveling lane 2. In FIG. 5, the axle load sensor 11 of the lane 1 and the axle load sensor 21 of the lane 2 are arranged so as to be shifted in the traveling direction of the vehicle. This is for convenience of wiring of the axle load sensors 11 and 21. Therefore, in principle, the axial load sensors 11 and 21 may not be displaced.

In FIG. 5, two large arrows represent the passage of tires when one vehicle A travels across the lane 1 and the lane 2. In FIG. 5, the left wheel of the vehicle passes over the right sensor 11R lane 1, the right wheel of the vehicle is passed over the left sensor 21L lane 2.

The detection state of the axle load sensor in lane 1 and lane 2 at this time is as shown in FIG. ○ in Figure 6 shows the sensor which detects the wheel load, × indicates the sensor did not detect the wheel load. For lane 1, since the left sensor 11L did not pass through the tires, all four sensors were “x”, and the right sensor 11R was passed through the tires, so all four sensors were “◯”. For lane 2, the left sensor 21L has passed tires, so all four sensors are ◯, and the right sensor 21R has no tire passed, so all four sensors are x. .

Thus, of the sensors 11L and 11R of the lane 1, the sensor 11R (corresponding to the first sensor ) on the side close to the lane 2 adjacent to the lane 1 and the sensor 21L and 21R of the lane 2 are close to the lane 1. A sensor 11L (corresponding to a third sensor ) on the side far from the lane 2 out of the sensors 11L, 11R of the lane 1 and a detection output is obtained almost simultaneously from the side sensor 21L (corresponding to the second sensor ); lane 2 sensors 21L, of 21R, when both the detection output of the far side of the sensor 21R from the lane 1 (corresponding to the fourth sensor) can not be obtained, traveling vehicle is straddling the lanes 1 and lane 2 It is determined. In this case, a value obtained by adding the wheel load value obtained from the detection output of the sensor 11R and the wheel load value obtained from the detection output of the sensor 21L is set as the axle load value .

By performing the determinations and calculations as described above, even when an overweight vehicle travels across the lane 1 and the lane 2 for the purpose of escaping the crackdown, it is possible to detect straddling travel and based on the axle weight value. The total weight of the straddling travel vehicle can be obtained, and an overweight vehicle can be reliably detected.

By the way, when the vehicle travels straddling, it does not always travel in the state as shown in FIG. 5. For example, as shown by the broken line arrow in FIG. If you, the left and right sensor 11L lane 1, extends over the left wheel 11R, the result, sensor 11L, which may both either et al detection output of 11R occur. In this case, the detection state of the axle load sensor in the lane 1 and the lane 2 is as shown in FIG. The sensor 11R on the right side of the lane 1 and the sensors 21L and 21R on the lane 2 are in the same detection state as in FIG. 6, but the sensor 11L on the left side of the lane 1 is loaded with the load on the left wheel of the vehicle. Are all marked with a circle.

Thus, detection outputs are obtained from both the sensor 11R (first sensor ) on the right side of the lane 1 and the sensor 21L (second sensor ) on the left side of the lane 2, and the sensor 11L (first sensor) on the left side of the lane 1 is obtained. 3 sensors) detected output is obtained from, and, if not detected output is obtained from the right side of the sensor 21R of lane 2 (fourth sensor), the ratio of the detection output of the sensor 11L and sensor 11R (this Calculate the single-carrying rate). When this ratio is not within the predetermined range, the detection outputs of the sensors 11L and 11R are ignored, and the wheel load value obtained from the detection output of the sensor 21L paired with the sensor 21R that has not obtained the detection output is obtained. Based on this, the axle load value is calculated . This is because it is extremely rare that the load applied to the left and right sensors 11L and 11R is equal when the vehicle travels as shown in FIG. as also shown, (in the case of FIG sensor 11R) wheel left or right sensor results biased in, since both sensors 11L, load 11R becomes unbalanced, precise from the detection outputs of these sensors This is because the axle load cannot be measured.

By performing the determination and calculation as described above, even when one wheel of the straddling vehicle passes across the sensor 11L and the sensor 11R, the axle load value obtained from the wheel load value detected by the sensor 21L is obtained. Based on this, it is possible to calculate the total weight of the vehicle that travels while leaning to the left. Even when the other wheel of the straddling travel vehicle passes over the sensor 21L and the sensor 21R, that is, when the straddling travel vehicle is biased to the right, the wheel load value detected by the sensor 11R according to the same principle. The total weight of the straddling travel vehicle can be calculated on the basis of the axle weight value obtained from (1).

FIG. 9 is a diagram for explaining stride determination in the case of three lanes. Here, a case where the vehicle B travels across the lane 1 and the lane 2 and the vehicle C travels across the lane 2 and the lane 3 is shown. Reference numeral 31 denotes an axle load sensor arranged in the lane 3, and 31L denotes a left sensor . For Figure 9, the left wheel of the vehicle B passes over the right sensor 11R lane 1, the right wheel has passed over the left sensor 21L lane 2. Also, the left wheel of the vehicle C passes over the right sensor 21R lane 2, right wheel is passed over the left sensor 31L lane 3.

The detection state of the axle load sensor in each lane at this time is as shown in FIG. For lane 1, since the left sensor 11L did not pass through the tires, all four sensors were “x”, and the right sensor 11R was passed through the tires, so all four sensors were “◯”. For lane 2, both the left sensor 21L and the right sensor 21R have passed tires, and therefore, each of the four sensors is circled. For lane 3, since the left sensor 31L has passed tires, all four sensors are ◯, and the right sensor (not shown) has no tire passing, so all four sensors are ×. It has become.

In FIG. 10, when only the detection state of the lane 2 is viewed, since there is a detection output from both the sensors 21L and 21R, it seems that one vehicle is traveling normally in the lane 2. However, in relation to the lane 1, the detection state of the sensor 21L of the lane 2 and the sensors 11L and 11R of the lane 1 is the same as in the case of FIG. 6, and is detected from the sensor 11L on one side (left side) of the lane 1. Since there is no output, it is determined that the vehicle B straddles the lane 1 and the lane 2. Also, when looking at the relationship with the lane 3, the detection state of the lane 3 is just opposite to the detection state of the lane 1, and there is no detection output from the sensor on one side (right side) of the lane 3. Similarly, it is determined that the vehicle C straddles the lane 2 and the lane 3.

FIG. 11 is a diagram for explaining stride determination when there is a lane change. Here, the case where the vehicle D is shifted from the lane 2 to the lane 1 and the vehicle E is traveling across the lane 2 and the lane 3 is shown. With the lane change of the vehicle D, the detection state of the axle load sensor in each lane becomes as shown in FIG. For the lane 1, among the left side sensor 11 </ b> L, b to d are circled by passing the left wheel of the vehicle D, and a is x without passing the left wheel. In addition, among the right sensors 11R, b to d are circled by the passage of the right wheel of the vehicle D, and a is circled by the passage of the left wheel of the vehicle D. Regarding the lane 2, a of the left sensor 21L becomes “O” when the right wheel of the vehicle D passes, and “b” to “d” show “X” without passing of the right wheel. The detection states of the sensor 21R on the right side of the lane 2 and the sensor 31L on the left side of the lane 3 are the same as in the case of FIG.

  In FIG. 12, the detection state of the lane 1 and the lane 2 is irregular due to the lane change of the vehicle D. That is, in the case of the lane 1, for the sensors b to d, the detection pattern consisting of a pair of left and right detection states is OO, whereas for the sensor a, the detection pattern is XX. In the case of the lane 2, the detection pattern for the sensors b to d is X, whereas the detection pattern for the sensor a is OO. Here, focusing only on the detection state of the sensor a, the detection states of the lanes 1 to 3 are the same as those in FIG. 10, and therefore, it is determined that the vehicle D is straddling. However, although it is certain that the vehicle D crosses the lane 1 and the lane 2 in the course of the lane change, this is a temporary phenomenon, and the vehicle D continues to travel while straddling the lane 1 and the lane 2. Not to do.

Therefore, in the present invention, in order to eliminate such an irregular detection state that occurs temporarily and prevent erroneous determination, a pair of left and right sensors out of a plurality of sensors arranged in the traveling direction of the vehicle . When the number of sensors having the same detection pattern is equal to or greater than a predetermined number, the detection output of the sensor is employed, and straddle determination is performed based on the detection output employed. In the case of FIG. 12, since there are four sensors (ad), if there are three or more sensors with the same detection pattern, the detection outputs of those sensors are adopted. That is, for the lane 1, the detection outputs (both left and right) of the three sensors b to d with the detection pattern of OO are adopted, and the detection output of the sensor a with the detection pattern of XX is ignored. An oblique line in FIG. 12 represents a detection output that is not adopted (ignored). For lane 2, the detection outputs (only on the right side) of the three sensors b to d with the detection pattern of “X” are adopted, and the detection outputs of the sensor “a” with the detection pattern of “O” are ignored. For the lane 3, the detection outputs (only the left side) of the four sensors a to d with the detection pattern being XX are adopted. As a result, it is determined that the vehicle D is traveling normally in the lane 1, and the vehicle E is determined to be traveling across the lane 2 and the lane 3, similarly to the vehicle C in FIG. 9. The In this way, even when there is a lane change, stride determination can be performed accurately.

  FIG. 13 is a flowchart showing the procedure of the straddling process in the axle load measuring system 100 of FIG. In step S1, the axle load measuring units 14 and 24 receive output signals from the axle load sensors of the respective lanes. In step S2, the measurement data (axle weight value) of each lane is calculated based on the received signal. In the case of the axle load measurement unit 14, this calculation is performed by the signal conversion unit 142 and the CPU 146 of FIG. In step S <b> 3, the calculated measurement data is transmitted to the roadside control unit 15. At this time, the time information at the time of detecting the axial load timed by the time measuring circuit 143 is also transmitted. If the measurement result in step S2 is one-side measurement using only one of the left and right sensors, the straddle flag is also transmitted.

  In steps S4 and S5, the road-side control unit 15 straddles the traveling vehicle based on the measurement data received from the axle load measurement units 14 and 24 according to the algorithm described with reference to FIGS. 6, 8, 10, and 12. The presence or absence of is determined. This determination is performed in the data processing unit 151 of FIG. As a result of the determination, if there is no straddling, the process returns to step S1, and if there is a straddling, the process proceeds to step S6. In step S6, the roadside control unit 15 calculates the weight of the straddling travel vehicle based on the one-side measurement data obtained from the detection output of either the left or right sensor of the axle load sensor. This calculation is also performed in the data processing unit 151 of FIG.

  In the next step S7, the roadside control unit 15 transmits a warning message and vehicle license plate information captured by the cameras 17 and 27 to the display plates 18 and 28, and displays them on the display plates 18 and 28. Let FIG. 14 shows an example of warning display in this case. Here, the overweight message M1 and the license plate information N are alternately displayed at regular time intervals. Since most of the straddling travel vehicles are overweight vehicles, in FIG. 14, an overweight warning is displayed regardless of the result of the weight calculation in step S6. A straddle warning display such as 15 may be performed. In FIG. 15, the message M2 of the crossing traveling and the license plate information N are alternately displayed. Further, when the weight calculated in step S6 exceeds the maximum limit value determined by the vehicle restriction ordinance, the warning of excess weight in FIG. 14 is displayed, and for vehicles whose weight does not exceed the maximum limit value, FIG. You may make it perform the warning display of straddling. Or you may make it perform the warning display of both overweight and straddle with respect to a straddling traveling vehicle. In this way, by displaying the warning messages M1 and M2 together with the license plate information N on the display plates 18 and 28, it is possible to inform the driver that it is useless even if straddling to escape the control. , Malicious travel can be suppressed.

  Even if the vehicle is overweight, it is not subject to enforcement in the case of a vehicle that has been approved by the road administrator, so that the overweight warning as shown in FIG. 14 is not displayed on the display boards 18 and 28. . Whether the vehicle is a permitted vehicle or an unauthorized vehicle can be identified by comparing the license plate information captured by the cameras 17 and 27 with the license plate information of the permitted vehicle registered in advance. However, even if it is such a vehicle, there is a risk of causing a contact accident with another vehicle as described above, so that a warning for straddling travel as shown in FIG. 15 is performed. Is desirable.

  Next, in step S <b> 8, the roadside control unit 15 transmits data of the traveling vehicle across the host device 16. This data includes the weight of the vehicle determined as straddling and license plate information, as well as straddling flags and time information. When the host device 16 receives this data, the warning lamp 165 (FIG. 4) is lit in step S9. When the warning lamp 165 is turned on, the attendant learns that a straddling traveling vehicle has been detected, and performs an operation for guiding the vehicle to a retracted lane (not shown) bypassed from the lane. The pull-in lane is provided with a stationary weight meter that measures the weight of the vehicle when it is stationary.

  In parallel with the lighting of the warning lamp 165 as described above, the host device 16 records the data received from the roadside control unit 15 in the data file 163 (FIG. 4) of the storage unit 162 in step S10. As a result, the license plate information of the straddling travel vehicle is accumulated to create a so-called black list, and the control of straddling travel can be strengthened based on this list.

  In the above-described embodiment, the four cases shown in FIGS. 5 to 12 are exemplified as the types of the crossing determination, but various other types can be considered. Therefore, the accuracy of the determination can be improved by preparing an algorithm corresponding to each type.

Moreover, although the example which used the rod-shaped sensor as an axial load sensor was given in the said embodiment, this invention is applicable also to the axial load measurement system using the loading board type sensor as an axial load sensor.

It is a figure which shows an example of the axial load measuring system which concerns on this invention. It is a block diagram of an axial weight measurement part. It is a block diagram of a roadside control part. It is a block diagram of a high-order apparatus. It is a figure which shows the basic principle of straddle determination. It is a figure which shows the detection state of the axial load sensor in the case of FIG. It is a figure which shows the other type of straddle determination. It is a figure which shows the detection state of the axial load sensor in the case of FIG. It is a figure explaining the straddle determination in the case of 3 lanes. It is a figure which shows the detection state of the axial load sensor in the case of FIG. It is a figure explaining straddle judgment when there is a lane change. It is a figure which shows the detection state of the axial load sensor in the case of FIG. It is the flowchart which showed the procedure of the crossing process. It is an example of the warning display displayed on a display board. It is another example of a warning display.

DESCRIPTION OF SYMBOLS 10 Vehicle 11, 21 Axle load sensor 12, 13, 22, 23 Loop coil 14, 24 Axle load measurement part 15 Road side control part 16 Host apparatus 17, 27 Camera 18, 28 Display board 100 Axle load measurement system

Claims (4)

An axle weight measurement system that is disposed on each road surface of a plurality of lanes and measures the axle weight of a traveling vehicle based on the detection output of an axle weight sensor configured by a pair of left and right sensors for left and right wheels ,
An axle load sensor deployed in the first lane;
An axle load sensor deployed in a second lane adjacent to the first lane ;
And a determining means for determining whether the traveling vehicle is astride the first lane and the second lane based on the detection output of the axle load sensor,
The determination means, of the pair of sensors constituting the axle load sensors deployed first lane, constituting a first sensor closer to the second lane, the axle load sensors deployed second lane Among the pair of left and right sensors, a detection output is obtained almost simultaneously from the second sensor on the side close to the first lane, and among the pair of left and right sensors constituting the axle load sensor arranged in the first lane , Detection output is generated from at least one of the third sensor far from the second lane and the fourth sensor far from the first lane among the pair of left and right sensors constituting the axle load sensor arranged in the second lane. if not obtained, the traveling vehicle is in the axle load measuring system to determine that spans the first lane and the second lane,
Each of the pair of left and right sensors constituting each axle load sensor arranged in each lane consists of a plurality of sensors arranged at predetermined intervals in the traveling direction of the vehicle,
The determination means adopts a detection output of the sensor when the number of sensors having the same detection pattern consisting of a pair of left and right detection states is equal to or greater than a predetermined number, and based on the detected output Axial load measuring system characterized by determining straddle . The axle load measuring system according to claim 1,
Reading means for reading the license plate information of the traveling vehicle;
Display means for displaying a warning together with license plate information read by the reading means for a traveling vehicle determined to be straddled by the determining means;
A shaft load measuring system characterized by further comprising: The axle load measuring system according to claim 1,
Reading means for reading the license plate information of the traveling vehicle;
Recording means for recording license plate information read by the reading means for a traveling vehicle determined to be straddled by the determining means;
A shaft load measuring system characterized by further comprising: Deployed to each of the road surface of multi-lane, a axle load measuring method for measuring the axle load of a running vehicle based on the right and left pair of sensors for the left wheel and the right wheel on the detection output of the configured axle load sensor,
Of the pair of left and right sensors constituting the axle load sensor arranged in the first lane, the first sensor on the side close to the second lane and the pair of left and right sensors constituting the axle load sensor arranged in the second lane Among them , it is determined whether or not a detection output can be obtained substantially simultaneously from the second sensor on the side close to the first lane,
Of the pair of left and right sensors constituting the axle load sensor arranged in the first lane , the third sensor far from the second lane and the pair of left and right sensors constituting the axle load sensor arranged in the second lane Among them , it is determined whether or not a detection output is obtained from at least one of the fourth sensor far from the first lane,
When the detection output is obtained substantially simultaneously from the first sensor and the second sensor and the detection output is not obtained from at least one of the third sensor and the fourth sensor , the traveling vehicle is in the first lane and the second lane. in axle load measuring method for determining the spans bets,
Each of the pair of left and right sensors constituting each axle load sensor arranged in each lane consists of a plurality of sensors arranged at predetermined intervals in the traveling direction of the vehicle,
Among the plurality of sensors, when there are a predetermined number or more of sensors having the same detection pattern consisting of a pair of left and right detection states, the detection output of the sensor is adopted, and the determination of straddle is performed based on the adopted detection output. A method for measuring the axial load, which is performed .

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