JP2012093158A - Apparatus for measuring centroid position of vehicle to be weighed in track scale - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously measure also a centroid height position of a vehicle to be weighed when weighing the vehicle to be weighed by adding a simple configuration to an existing track scale (including an arithmetic processing unit).SOLUTION: In a track scale, a weighing platform 10 including a flat surface 11 of an area capable of simultaneously mounting the whole wheels of a vehicle and a front wheel mounting stage 12 stepped up by a predetermined height on a front position of the flat surface 11 is used, and a vehicle position detector 8 capable of detecting the front wheel positions and rear wheel positions of the vehicle to be weighed is provided. An arithmetic processing unit 3 includes, front/rear displacement calculation means, inter-axle distance calculation means 21, vehicle inclination angle calculation means 22, front wheel axle load calculation means 23A, rear wheel axle load calculation means 23B, front/rear centroid position calculation means 24, storage means 32, front/rear centroid displacement calculation means 25, and vehicle centroid height position calculation means 26, and is configured so as to calculate the centroid height position of the vehicle to be weighed from the centroid displacement calculated from front/rear centroid position information calculated on the flat surface 11 and front/rear centroid position information calculated in a state of mounting the front wheels on the front wheel mounting stage 12, and the vehicle inclination angle calculated by the vehicle inclination angle calculation means 22.

Description

  In the present invention, load cells are provided near the four corners of the weighing platform, respectively, and the weight of the vehicle to be weighed is measured based on the detection value from each load cell when all the wheels of the vehicle to be weighed are placed on the weighing platform. More specifically, the present invention relates to an apparatus for measuring the center of gravity of a vehicle to be weighed on a track scale, which can automatically measure the position of the center of gravity of a vehicle to be weighed by placing the vehicle to be weighed on a weighing platform. is there.

  One example of a truck scale in which a vehicle to be weighed is placed on a weighing platform and the weight of the vehicle to be weighed is measured is disclosed in, for example, Japanese Patent Application Laid-Open No. 2006-105845 (Patent Document 1).

  In the track scale of this known example (Patent Document 1), load cells are provided in the vicinity of the four corners of the weighing platform, and the respective detections detected by the load cells when all the wheels of the vehicle to be weighed are placed on the weighing platform. The weight of the vehicle to be weighed is measured by calculating (summing up) the value based on the value. In addition, when the weighing platform is long in the front and rear, there are some in which a load cell is provided in the middle portion in the length direction (there are some using a total of 6 or 8 load cells).

  By the way, if you turn the steering wheel while driving a vehicle (especially a truck with a tall box or container), a large centrifugal force is generated in the entire vehicle and it tends to roll over. This rollover action (centrifugal force) This occurs greatly when the position of the center of gravity of the vehicle is at a high position or when the position of the center of gravity is greatly displaced left and right from the center of the four corner wheels. In particular, the greater the position of the center of gravity is at a higher position and the greater the displacement from side to side, the greater the centrifugal force is exerted by the synergistic action (a rollover accident is more likely to occur).

  On the other hand, when loading a package into a box or container on a truck bed, it is preferable to load it while taking into account a certain weight balance. However, loading the package mainly takes into account the volume filling efficiency first. This is the current situation, and the weight balance of the loaded luggage was very about. It should be noted that in a state in which a package is loaded in a box or container on the truck bed, it is impossible to visually determine where the center of gravity of the entire packaged vehicle is located.

  Therefore, in most cases, the vehicle is traveling on the road without judging where the center of gravity of the entire vehicle including the luggage is, and the center of gravity of the vehicle is at a high place or is greatly displaced from side to side. In some cases, there was a risk of a rollover accident caused by a sudden handle operation.

JP 2006-105845 A

  By the way, there is no normal (for example, Patent Document 1) track scale that can measure where the center of gravity of the vehicle to be weighed is, and the center of gravity of the vehicle to be weighed particularly in the existing track scale. It was impossible to measure the height position.

  Therefore, the inventors of the present application add a simple configuration to an existing track scale (including an arithmetic processing unit) so that the position of the center of gravity of the vehicle to be weighed (particularly the height of the center of gravity) is also measured. It has been found that measurement can be performed at the same time, and a patent application has been filed for a device for measuring the position of the center of gravity of a vehicle to be weighed on a track scale.

  The present invention has the following configuration as means for solving the above problems. In the present invention, the position of the center of gravity of the vehicle to be weighed (particularly the height of the center of gravity) can be measured in a state where the vehicle to be weighed is placed on a weighing platform of a truck scale. Note that the name of the present invention is “the center of gravity position measuring device of the vehicle to be weighed on the track scale”, but in the following description, the name of the present invention may be simply expressed as “vehicle center of gravity position measuring device”.

[Invention of Claim 1 of the Present Application]
The vehicle center-of-gravity position measuring device according to the first aspect of the present invention provides a load cell on each of the lower surfaces near the four corners of the weighing platform, and performs an arithmetic process based on the detection value from each load cell when the vehicle to be weighed is placed on the weighing platform. The present invention is applied to a truck scale that can measure the weight of a vehicle to be weighed by a device. The vehicle center-of-gravity position measuring apparatus according to the first aspect of the invention can measure the center-of-gravity height position of the to-be-measured vehicle whose distance between the front and rear axles is unknown, as will be described later.

  The track scale weighing platform used in the present application has a large number of wheel shafts (e.g., towing a carrier for loading a container from a relatively small truck having only two wheel shafts, a front wheel shaft and a rear wheel shaft). It has an area (length) that can be measured up to a large truck having about 4 axes). In addition, when the weighing table has a long length, the load cell can be provided near the left and right sides of the intermediate portion in the length direction in addition to the four corners of the weighing table.

  The vehicle center-of-gravity position measuring device according to claim 1 of the present application has the following components.

  First, as a weighing platform, a flat surface having an area where all the wheels of the vehicle to be weighed can be loaded simultaneously and a front wheel platform that is raised by a predetermined height from the flat surface is provided at the front position of the flat surface. . The flat surface of the weighing platform is a horizontal plane. Further, the step-up height from the flat surface of the front wheel mount is such that it does not receive excessive impact (uncomfortable feeling) when the front wheels of the vehicle to be weighed get on and off the front wheel mount, and is particularly limited. Although it is not a thing, it can set to the appropriate height of the range of about 10-100 mm, for example. In order to increase the step height of the front wheel mount, it is preferable to provide slopes at the front and rear end edges of the front wheel mount. The raised height of the front wheel mount is unchanged, and is stored in advance in the storage means as height information of the front wheel mount.

  A wheel position detector capable of detecting the front wheel position and the rear wheel position of the vehicle to be weighed placed on the weighing table is provided at a side position of the weighing table. This wheel position detector detects the positions of the front and rear wheels (one on the left and right sides) of the to-be-measured vehicle stopped on the weighing platform, and an optical sensor can be used. Further, this wheel position detector is a single one, and swings in a large angle range (for example, a range of 150 ° to 160 °) in the front and rear horizontal direction at a fixed position on the side of the weighing platform and at the wheel height position. Thus, the obstacle (wheel) in the swing range is monitored. And this wheel position detector swings back and forth, when an obstacle (wheel) is detected from the non-detection state (when ON) and when it is not detected from the detection state (when OFF), respectively. The distance information and angle information to the obstacle are acquired and the information is output to the arithmetic processing unit. In the arithmetic processing unit, calculation processing of various data described later is performed based on distance information and angle information from the wheel position detector.

  Note that it is unclear at which position on the weighing platform the vehicle to be weighed on the weighing platform stops, but the wheel position detector can be used even if the vehicle to be weighed stops at any position on the weighing platform. The front and rear wheel positions can be detected by swinging back and forth.

  The arithmetic processing unit includes various calculation means for calculating the position of the center of gravity of the vehicle to be weighed, that is, a longitudinal displacement amount calculation means, an inter-axle distance calculation means, a vehicle inclination angle calculation means, and a front wheel axle weight calculation. Means, rear wheel axle weight calculating means, front and rear center of gravity position calculating means, storage means, front and rear center of gravity displacement amount calculating means, and vehicle center of gravity height position calculating means.

  The front / rear displacement amount calculating means is configured to determine whether the vehicle to be measured is based on the wheel position information from the wheel position detector in a state where the vehicle to be weighed is placed on the weighing platform from the reference position in the front-rear direction (for example, the front and rear load cell positions). This is a calculation of how much the object is displaced back and forth.

  The inter-axle distance calculating means calculates the distance between the front and rear axles from the front wheel position and the rear wheel position detected by the wheel position detector. The vehicle center-of-gravity position measuring device according to claim 1 is applied to a vehicle whose distance between the front and rear axles of the vehicle to be measured is unknown, and calculates the distance between the axles every time each vehicle to be measured rides on the weighing platform. The distance between the front and rear axles of the vehicle to be weighed is calculated by the means.

  The vehicle inclination angle calculating means is configured to calculate the vehicle to be weighed based on the distance between the axles calculated by the inter-axle distance calculating means and the height of the front wheel mount while the front wheels of the vehicle to be weighed are placed on the front wheel mount of the weighing platform. The front-rear inclination angle is calculated.

  The front wheel axle weight calculating means and the rear wheel axle weight calculating means calculate the front wheel axle weight and the rear wheel axle weight at the current position based on the detection values from the respective load cells.

  The front / rear center-of-gravity position calculating means is configured to determine a vehicle center of gravity from a front wheel axle weight and a rear wheel axle weight calculated by a front wheel axle weight calculating means and a rear wheel axle weight calculating means, respectively, and a vehicle front / rear displacement amount calculated by a front / rear displacement amount calculating means. The position in the longitudinal direction of the vehicle is calculated.

  The storage means stores front / rear center-of-gravity position information calculated by the front / rear center-of-gravity position calculation means in a state where all the wheels of the vehicle to be weighed are placed on the flat surface of the weighing platform.

  The front-rear center-of-gravity displacement amount calculating means stores the front-rear center-of-gravity center position information newly calculated by the front-rear center-of-gravity center position calculating means in a state where the front wheel of the vehicle to be weighed is placed on the front wheel platform of the weighing table and the storage means. The longitudinal centroid displacement amount is calculated by comparing the longitudinal centroid position information on the flat surface.

  The vehicle center-of-gravity height position calculating means calculates the center-of-gravity height position of the to-be-measured vehicle based on the front-rear center-of-gravity displacement calculated by the front-rear center-of-gravity displacement calculating means and the vehicle inclination angle calculated by the vehicle inclination angle calculation means. Is to be calculated.

  Note that the details of the calculation method by each of the calculation means in the arithmetic processing device will be described in detail in the section of the embodiment described later.

  The vehicle center-of-gravity position measuring apparatus according to claim 1 of the present application functions as follows. First, with all the wheels of the vehicle to be weighed resting on the flat surface of the weighing platform, the distance between the axles before and after the vehicle to be weighed is calculated by the inter-axle distance calculation means based on the wheel position information from the wheel position detector. At the same time, the longitudinal displacement amount of the measured vehicle is calculated by the longitudinal displacement amount calculation means. In addition, the front wheel of the vehicle to be weighed is placed on the front wheel mount by the vehicle inclination angle calculation means from the distance between the axles calculated by the distance calculation means by the vehicle inclination angle calculation means and the height information of the front wheel mount. The vehicle inclination angle in the state is calculated. Next, the front and rear center-of-gravity position calculation means calculates the front and rear center of gravity position calculation means from the front and rear displacement amounts calculated by the front and rear displacement amount calculation means and the front wheel axle weight calculation means and the rear wheel axle weight calculation means, respectively. The center of gravity position is calculated, and the front and rear center of gravity position information is stored in the storage means. Thereafter, the vehicle to be weighed is advanced and the front and rear center of gravity position calculating means newly calculates the front and rear center of gravity position of the vehicle with the front wheels resting on the front wheel platform, and the new front and rear center of gravity position information and the storage means are stored. The front / rear center of gravity displacement information is compared with the previous front / rear center of gravity position information (front / rear center of gravity position information on a flat surface) and the front / rear center of gravity displacement amount is calculated by the front / rear center of gravity displacement amount calculation means. The vehicle center-of-gravity height position can be calculated by the vehicle center-of-gravity height position calculation means based on the vehicle inclination angle in the state of being placed on the table.

  As described above, in the invention of claim 1 of the present application, a front wheel platform that is stepped up by a predetermined height is required in front of the weighing platform (flat surface). This front wheel platform has a very simple configuration. Further, the front and rear wheel positions can be detected relatively easily by the wheel position detector. In other configurations, the above-described various calculation means need only be incorporated into the arithmetic processing unit, and therefore the center-of-gravity height position of the weighing vehicle can be measured with a simple configuration as a whole. In the vehicle center-of-gravity position measuring apparatus according to the first aspect, the center-of-gravity position of the vehicle can be measured fully automatically even if the vehicle is not registered in the track scale.

  By the way, knowing the position of the center of gravity of the vehicle in this way can predict the degree of rollover of the vehicle when traveling on the road, and whether or not the current vehicle has secured safety regarding rollover in advance. I can know.

  In the vehicle center-of-gravity position measuring apparatus according to the first aspect, the front-rear center-of-gravity center position can also be calculated by the front-rear center-of-gravity position calculation means before the vehicle center-of-gravity height position is calculated. Information on the vehicle front-rear center of gravity position and vehicle center-of-gravity height position can be displayed along with the weighing display.

[Invention of claim 2 of the present application]
The vehicle center-of-gravity position measuring apparatus according to claim 2 of the present application can be applied when the distance between the front and rear axles of the vehicle to be weighed is known in advance.

  The vehicle center-of-gravity position measuring apparatus according to claim 2 is replaced with the inter-axle distance calculating means (which calculates the inter-axle distance based on the front / rear wheel position information from the wheel position detector) according to claim 1 above. The inter-axle distance (actually measured value) of the vehicle to be weighed in advance is stored in the inter-axle distance storage means, and the inter-axle distance stored in the inter-axle distance storage means is stored in the vehicle inclination angle calculation means. It is used for calculation. The other structure of the vehicle center-of-gravity position measuring apparatus according to the second aspect is substantially the same as that of the first aspect.

  In the vehicle center-of-gravity position measuring apparatus according to the second aspect, when the vehicle to be weighed is a registered vehicle, the distance between the front and rear axles is stored in advance together with other data, and when the vehicle to be weighed is a non-registered vehicle, immediately before weighing. Each time, the distance between the axles of the vehicle (actual value described in the vehicle verification etc.) is inputted from the input device (keyboard) and stored in the distance between axle storage means.

  In the vehicle center-of-gravity position measuring apparatus according to claim 2, although the method for obtaining information on the distance between the axles of the vehicle to be weighed is different from that of claim 1, the rest is the same as that of claim 1 by the arithmetic processing unit. A calculation process is performed so that the position of the center of gravity of the vehicle to be weighed can be measured.

  According to the second aspect of the present invention, since the accurate distance between the axles (actually measured value) that is known in advance is inputted and stored in the inter-axle distance storage means, as in the case of the first aspect, from the wheel position detector. More accurate inter-axle distance data can be provided than when calculated by the inter-axle distance calculating means based on wheel position information (a detection error may occur).

[Invention of claim 3 of the present application]
The vehicle center-of-gravity position measuring apparatus according to the third aspect of the present invention measures the front and rear axle weights (front wheel axle weight and rear wheel axle weight) of the vehicle to be weighed with an axle weight meter (for example, a mat scale) separately from the track scale. Applicable to the case.

  The vehicle center-of-gravity position measuring apparatus according to claim 3 replaces the front wheel axle weight calculating means and the rear wheel axle weight calculating means according to claim 1 with the front wheel axle weight and the rear wheel axle weight of the vehicle to be weighed separately provided. The front wheel axle weight and the rear wheel axle weight measured by the axle weight meter are stored in the front wheel axle weight storage means and the rear wheel axle weight storage means respectively with an input device (keyboard) before weighing on the track scale. Let me. According to the third aspect of the present invention, since the front wheel axle weight and the rear wheel axle weight are measured by a separate axle weight meter, it is not necessary to calculate the front and rear axle weights in the arithmetic processing unit.

  In the vehicle center-of-gravity position measuring apparatus according to claim 3, the front wheel axle weight and the rear wheel axle weight respectively stored in the front wheel axle weight storage means and the rear wheel axle weight storage means when weighing the vehicle to be weighed, The front / rear center of gravity position calculation means calculates the front / rear center of gravity position of the vehicle to be weighed from the front / rear displacement amount calculated by the displacement amount calculation means. The other structure of the vehicle center-of-gravity position measuring apparatus according to the third aspect is substantially the same as that of the first aspect.

  In the vehicle center-of-gravity position measuring device according to claim 3, the method for obtaining information on the front wheel axle weight and the rear wheel axle weight of the to-be-measured vehicle is different from that of the above-mentioned claim 1, but the others are determined by the arithmetic processing unit. The calculation process similar to 1 is performed, and the center-of-gravity height position of the vehicle to be weighed can be measured.

[Invention of claim 4 of the present application]
The vehicle center-of-gravity position measuring device according to claim 4 of the present application employs the inter-axle distance storage means of claim 2 in place of the inter-axle distance calculation means of claim 1, and the front of claim 1 Instead of the wheel axle weight calculating means and the rear wheel axle weight calculating means, the front wheel axle weight storage means and the rear wheel axle weight storage means according to the third aspect are employed.

  That is, in the vehicle center-of-gravity position measuring apparatus according to claim 4, the axle distance (actually measured value) of the vehicle to be weighed in advance is stored in the inter-axle distance storage means, and is measured by a separate axle weight meter. The front wheel axle load and the rear wheel axle weight are stored in the front wheel axle load storage means and the rear wheel axle load storage means, respectively.

  In the vehicle center-of-gravity position measuring apparatus according to claim 4, when weighing the vehicle to be weighed, when the front wheel is placed on the front wheel platform of the weighing table based on the inter-axle distance information stored in the inter-axle distance storage means. The vehicle inclination angle is calculated by the vehicle inclination angle calculation means, while the front wheel axle weight and the rear wheel axle weight respectively stored in the front wheel axle weight storage means and the rear wheel axle weight storage means, and the longitudinal displacement amount calculation means of claim 1 above. From the calculated longitudinal displacement amount, the longitudinal center-of-gravity position of the to-be-measured vehicle is calculated by the longitudinal center-of-gravity position calculating means. The other structure of the vehicle center-of-gravity position measuring apparatus according to the fourth aspect is substantially the same as that of the first aspect.

  And in this vehicle center-of-gravity position measuring device of claim 4, each method for obtaining information on the distance between axles and information on the front wheel axle weight and the rear wheel axle weight in the vehicle to be weighed is different from that in claim 1 described above. In other respects, a calculation process similar to that of the first aspect is performed by the arithmetic processing unit so that the position of the center of gravity of the vehicle to be weighed can be measured.

[Invention of claim 5 of the present application]
The vehicle center-of-gravity position measuring apparatus according to the fifth aspect of the present invention can be applied to the case where the center-of-gravity position of a vehicle to be weighed of a vehicle type having the same distance between the front and rear axles is measured.

  In the vehicle center-of-gravity position measuring apparatus according to claim 5, the vehicle inclination angle calculated by the vehicle inclination-angle calculating means in the vehicle center-of-gravity position measuring apparatus according to claim 1 is set between the axles of the to-be-measured vehicles which are invariant data. The vehicle tilt angle obtained from the distance (actually measured value) and the step height (actually measured value) of the front wheel platform of the weighing platform, stored in advance in the vehicle tilt angle storage means, and stored in the vehicle tilt angle storage means Is used for calculating the vehicle center of gravity height position in the vehicle center of gravity height position calculating means. The other structure of the vehicle center-of-gravity position measuring apparatus according to the fifth aspect is substantially the same as that of the first aspect.

  In the vehicle center-of-gravity position measuring apparatus according to claim 5, the center-of-gravity height position for each vehicle in the vehicle to be weighed is the same for all the distances between the front and rear axles. In this case, the axle of each vehicle to be weighed is measured. Since the distance between the wheels is the same, the vehicle inclination angle when the front wheels are mounted on the front wheel platform is obtained from the distance between the axles, which is invariable data, and the step height of the front wheel platform (each measured value). Thus, the vehicle inclination angle is stored in the vehicle inclination angle storage means.

  In the vehicle center-of-gravity position measuring apparatus according to claim 5, although the method for obtaining the information regarding the vehicle inclination angle in claim 1 is different, the calculation processing similar to that of claim 1 is performed by the arithmetic processing unit. Thus, the position of the center of gravity of the vehicle to be weighed can be measured.

  In addition, although the present invention can be applied only to vehicles to be weighed with the same distance between the axles, the vehicle inclination angle with the front wheel mounted on the front wheel mount is determined on the desk based on actual invariant data. Therefore, the vehicle tilt angle data stored in the vehicle tilt angle storage means is accurate.

[Invention of claim 6 of the present application]
The invention of claim 6 of the present application can calculate which position of the vehicle center of gravity is the three-dimensional position (front and rear, top and bottom, left and right) of the vehicle. That is, in the vehicle center-of-gravity position measuring apparatus according to claims 1 to 5, the front-rear center-of-gravity position calculation unit can calculate the front-rear center-of-gravity position, and the vehicle center-of-gravity height position is finally calculated as the vehicle center-of-gravity position. It can be calculated by means, and the three-dimensional position of the center of gravity of the vehicle can be known by allowing the position of the center of gravity of the vehicle to be calculated thereafter.

  In the invention of claim 6 of the present application, the following respective components are added to the vehicle gravity center position measuring apparatus of claims 1 to 5.

  First, the vertical vertical distance from the wheel position detector with respect to the center extension line between the two load cells located on the left and right and information on the distance between the left and right wheels of the vehicle to be measured are stored in the storage means. In other words, the installation position of each load cell and the installation position of the wheel position detector are invariant data, and the horizontal scale distance from the wheel position detector with respect to the center extension line between the load cells is measured from these data to measure the track scale. It is stored in the storage means (ROM) of the personal computer in the room. When the vehicle to be weighed is a contract vehicle, the basic data of the vehicle (plate number, empty vehicle weight, number of axles, distance between left and right wheels, etc.) is also registered in advance in the personal computer (stored in storage means). By inputting the plate number of the vehicle during weighing, the basic data of the vehicle to be weighed can be called up. In the case of a to-be-measured vehicle that is not a contract vehicle (basic data is not registered), information relating to the distance between the left and right wheels may be input to the personal computer before weighing.

  In addition to the various calculation means provided in the first to fifth aspects, the arithmetic processing device used in the sixth aspect includes a left / right displacement amount calculating means, a left / right wheel weight calculating means, which will be described later. And left and right center-of-gravity position calculating means.

  The left / right displacement amount calculating means is configured such that a center extension line between left and right wheels is a center extension line between left and right load cells based on wheel position information from a wheel position detector in a state where a vehicle to be weighed is placed on a weighing platform. The amount of displacement to the right and left is calculated.

  The left and right wheel load calculating means calculates the total wheel load of each of the left and right wheel groups in the to-be-measured vehicle based on the detection value from each load cell when the to-be-measured vehicle is placed on the weighing platform. is there. This left and right wheel weight calculating means includes two means, a left wheel group wheel weight calculating means for calculating the total wheel weight for the entire left wheel group and a right wheel group wheel weight calculating means for calculating the total wheel weight for the entire right wheel group. have.

  The left / right center-of-gravity position calculating means determines the position of the center of gravity of the vehicle in the left-right direction of the vehicle from the total left and right wheel weights calculated by the left-right wheel weight calculating means and the left-right displacement amount calculated by the left-right displacement amount calculating means. It is to calculate whether or not there is.

  Note that details of the calculation method by each of the calculation means for calculating the vehicle left and right center-of-gravity position in the arithmetic processing apparatus according to claim 6 will be described in detail in the section of an embodiment described later.

  The vehicle center-of-gravity position measuring device according to claim 6 of the present application has a function of calculating the vehicle left-right center of gravity position in addition to the functions of the above-described claims 1 to 5 (both vehicle front-rear center-of-gravity position and vehicle center-of-gravity height position calculation functions). . That is, in the vehicle center-of-gravity position measuring apparatus according to claim 6, the center extension line between the left and right wheels is compared to the center extension line between the left and right load cells by the left / right displacement amount calculation means in a state where the vehicle to be weighed is placed on the weighing platform. While calculating how much it is displaced to the left and right, the left and right wheel weight calculating means calculates the left and right total wheel weights respectively, and the left and right center of gravity position calculating means calculates the left and right total wheel weights and the left and right displacement amounts. The position of the center of gravity of the vehicle can be calculated.

  Therefore, the vehicle center-of-gravity position measuring apparatus according to claim 6 can calculate the vehicle left-right center-of-gravity position in addition to the calculation of both the vehicle front-rear center-of-gravity position and the vehicle center-of-gravity height position according to claims 1 to 5. That is, the position of the center of gravity of the vehicle to be weighed can be calculated three-dimensionally in the front-back direction, the left-right direction, and the up-down direction.

[Effect of the invention of claim 1 of the present application]
The vehicle center-of-gravity position measuring apparatus according to claim 1 of the present application can calculate the vehicle center-of-gravity height position, which is impossible with the existing track scale, simultaneously with the weighing of the vehicle to be weighed by the track scale. There is an effect that can be done. Note that the higher the center of gravity of the vehicle is, the higher the risk of rollover during traveling is. However, knowing the height position of the center of gravity of the vehicle in this way can predict the risk of overturning of the vehicle during traveling on the road. It is possible to know in advance whether the current vehicle has secured safety regarding rollover.

  In the invention of claim 1 of the present application, in order to calculate the center-of-gravity height position of the vehicle to be weighed, a weighing platform provided with a front wheel platform raised by a predetermined height at the front position of the flat surface, and front and rear wheel positions are calculated. The wheel position detectors to be detected are used respectively. Other than that, since it can be achieved simply by incorporating various calculation means for calculating the vehicle center of gravity height into the arithmetic processing unit, the configuration of the vehicle center of gravity position measuring device is very It is also easy to manufacture at low cost.

  In the vehicle center-of-gravity position measuring apparatus according to the first aspect, the front-rear center-of-gravity position calculating means can calculate the front-rear center-of-gravity position in the process of calculating the center-of-gravity height position of the vehicle to be weighed. Can also be recognized.

[Effect of the invention of claim 2 of the present application]
In the invention of claim 2 of the present application, in the vehicle center-of-gravity position measuring device of claim 1, the distance between axles of the vehicle to be weighed is stored in the vehicle inclination angle storage means based on the actual measurement value. It is accurate because it is a measured value.

  Therefore, in the center-of-gravity position measuring apparatus according to the second aspect, in addition to the effect of the first aspect, the distance between the axles on which the vehicle inclination angle calculated by the vehicle inclination angle calculating means is based is accurate. A high vehicle inclination angle can be calculated, and the calculated value of the vehicle center-of-gravity height position finally calculated by the vehicle center-of-gravity height position calculation means based on this can be obtained with high reliability.

[Effect of the invention of claim 3 of the present application]
In the invention of claim 3 of the present application, the front wheel axle weight and the rear wheel axle weight of the vehicle to be weighed are measured with a separate axle load meter, and before weighing the vehicle to be weighed on the truck scale, The front wheel axle weight and the rear wheel axle weight are stored in the front wheel axle weight storage means and the rear wheel axle weight storage means, respectively. Therefore, the front wheel axle weight and the rear wheel axle weight in the arithmetic processing unit are actually measured on the track scale. It is not necessary to calculate

  Therefore, in the invention of claim 3, in addition to the effect that the vehicle center of gravity height position can be calculated in the same manner as in claim 1, the calculation of the front wheel axle weight and the rear wheel axle weight in the arithmetic processing unit is not required. There is an effect that the configuration of the arithmetic processing unit can be simplified.

[Effect of the invention of claim 4 of the present application]
In the invention of claim 4 of the present application, the distance between the axles of the vehicle to be weighed and the front and rear axle weights are stored in predetermined storage means before weighing on the truck scale, so that calculation is performed at the time of actual weighing on the truck scale. The calculation of the distance between the axles and the calculation of the front and rear wheel loads in the processing device are not required.

  Therefore, in the invention of claim 4, in addition to the effect that the vehicle center of gravity height position can be calculated in the same manner as in claim 1, the calculation of the distance between the axles and the calculation of the front and rear wheel weights in the arithmetic processing unit are performed. Since it becomes unnecessary, there is an effect that the configuration of the arithmetic processing unit can be simplified as compared with the third aspect.

[Effect of the invention of claim 5 of the present application]
According to the fifth aspect of the present invention, in the vehicle center-of-gravity position measuring apparatus according to the first aspect, the vehicle inclination angle when the front wheel is placed on the front wheel mount is determined as the distance between the axles of the vehicle to be measured which is invariable data (actual measurement) Value) and the height of the front stage of the weighing platform (actually measured value) and stored in the vehicle inclination angle storage means. The vehicle inclination angles stored in the vehicle inclination angle storage means are respectively It is accurate because it is obtained from the distance between the axles based on the actual measurement value and the height of the front wheel mount.

  Therefore, in the vehicle center-of-gravity position measuring apparatus according to claim 5, although only the to-be-measured vehicles having the same distance between the axles can be applied, the vehicle inclination angle stored in the vehicle inclination angle storage means is accurate. In addition to the effect, there is an effect that the calculated value of the vehicle center of gravity height position finally calculated by the vehicle center of gravity height position calculation means becomes highly reliable.

[Effect of the invention of claim 6 of the present application]
The vehicle center-of-gravity position measuring apparatus according to claim 6 of the present application has the above-described configuration, in addition to the functions of claims 1 to 5 (both vehicle front-rear center of gravity position and vehicle center-of-gravity height position calculation function). The position can also be calculated. Note that the greater the displacement of the vehicle center of gravity to the left and right, the higher the risk of rollover during travel.In this way, knowing the amount of lateral displacement of the vehicle center of gravity is in addition to recognizing the vehicle center of gravity height position. This is important for predicting the risk of vehicle rollover during road travel.

  Therefore, in the invention of claim 6, in addition to the effects of claims 1 to 5, the center of gravity position of the vehicle to be weighed can be calculated three-dimensionally in the front-rear, left-right, and up-down directions. There is an effect that the risk of rollover can be grasped more strictly.

It is a top view of the state in which the to-be-measured vehicle in the truck scale provided with the vehicle gravity center position measuring device of an example of this application has been laid on the flat surface of a measuring stand. It is an II-II arrow line view of FIG. It is an III-III arrow enlarged view of FIG. FIG. 2 is an explanatory diagram of a method for calculating a position of a to-be-measured vehicle in the vehicle center-of-gravity position measuring apparatus in FIG. 1. It is a top view in the state where the front wheel of the to-be-measured vehicle in the track scale of Drawing 1 is mounted on the front wheel stand of a weighing stand. It is a VI-VI arrow line view of FIG. FIG. 7 is a partially enlarged view of FIG. 6. 1 is a schematic block diagram of a vehicle center-of-gravity position measuring apparatus according to an embodiment of the present application. 1 is a detailed block diagram of a vehicle center-of-gravity position measuring apparatus according to a first embodiment of the present application. It is a detailed block diagram of the vehicle gravity center position measuring apparatus of 2nd Example of this application. It is a detailed block diagram of the vehicle gravity center position measuring apparatus of 3rd Example of this application. It is a detailed block diagram of the vehicle center-of-gravity position measuring apparatus of the fourth embodiment of the present application. It is a detailed block diagram of the vehicle center-of-gravity position measuring apparatus of the fifth embodiment of the present application.

  The vehicle center-of-gravity position measuring apparatus according to the embodiment of the present invention will be described with reference to FIGS. 1 to 13. This vehicle center-of-gravity position measuring apparatus uses the track scale 1 shown in FIGS. 9 to 13), the position of the center of gravity of the to-be-measured vehicle 5 can be measured using the arithmetic processing device 3 shown in FIG. FIG. 9 is a block diagram of a vehicle gravity center position measuring apparatus according to a first embodiment corresponding to claims 1 and 6 of the present application, and FIG. 10 is a second embodiment corresponding to claims 2 and 6 of the present application. FIG. 11 is a block diagram of a vehicle gravity center position measuring apparatus according to a third embodiment corresponding to claims 3 and 6 of the present application, and FIG. FIG. 13 is a block diagram of a vehicle gravity center position measuring apparatus according to a fourth embodiment corresponding to claim 6, and FIG. 13 is a block diagram of a vehicle gravity center position measuring apparatus according to a fifth embodiment corresponding to claims 5 and 6 of the present application. is there.

  First, the overall configuration of the track scale 1 used in this embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the track scale 1 is provided with load cells 13 </ b> A to 13 </ b> D on the lower surfaces near the four corners of the weighing platform 10 that is long in the front and rear, and each of the vehicles 5 to be weighed on the weighing platform 10. Based on the detection values from the load cells 13A to 13D, the weight of the to-be-measured vehicle 5 can be measured by the arithmetic processing unit (CPU) 3 shown in FIG.

  In this embodiment, in order to make it easy to understand the calculation method of the center of gravity position of the vehicle, the load cells 13A to 13D are used one by one near the four corners of the front, rear, left and right on the bottom surface of the weighing platform 10 (four in total), The wheels 51A to 51D of the to-be-measured vehicle 5 employ four wheels on the front, rear, left and right. In each figure, reference numeral 52A denotes a front wheel shaft, and reference numeral 52B denotes a rear wheel shaft.

  There is a management room 7 near the truck scale 1, and the management room 7 is provided with a computer 2 for performing various processes relating to weighing of the vehicle to be weighed 5.

  As shown in FIG. 8, in addition to the arithmetic processing unit (CPU) 3, the computer 2 includes various storage means (ROM, RAM) 31, 32, a display (DISP) 33, an input device (KEY) 34, and the like. have. The computer 2 here performs all processing relating to measurement on the track scale 1 and measurement of the position of the center of gravity.

  In the truck scale 1, when the vehicle 5 to be weighed is placed on the weighing platform 10, the detection values detected by the load cells (LC1 to LC4) 13A to 13D are amplified by the amplifiers 14 as shown in FIG. Thereafter, the signal is converted into a digital signal by the A / D converter 15 and input to the arithmetic processing unit (CPU) 3, and the detection values (digital signals) detected by the load cells 13 </ b> A to 13 </ b> D in the arithmetic processing unit 3 are added together. As a result, the total weight of the to-be-measured vehicle 5 can be displayed on the display (DISP) 33. Various data displayed on the display 33 can be printed out as a measurement report.

  The input device (KEY) 34 is a keyboard of the computer 2, and the input device 34 stores basic data (for example, a car number, an empty weight of the vehicle, etc.) of the vehicle to be weighed in a storage means (ROM) of the computer 2. 31 can be registered (stored).

  By the way, in the conventional general truck scale, although various data relating to the weight of each wheel weight, each axle weight, total weight, etc. in the to-be-measured vehicle can be calculated, the measurement relating to the position of the center of gravity of the vehicle related to the rollover action during traveling is possible. It was impossible.

  Therefore, in the vehicle center-of-gravity position measuring apparatus according to the embodiment of the present application, various data regarding the center-of-gravity position of the to-be-measured vehicle 5 can be calculated on the weighing platform 10 of the truck scale 1 in addition to various weights.

  In the vehicle center-of-gravity position measuring apparatus of this embodiment, a front wheel mounting base 12 (described later) is added to the weighing platform 10, while the front wheel position A (for example, A1 in FIG. 2) of the vehicle 5 to be weighed placed on the weighing platform 10. Alternatively, a wheel position detector 8 capable of detecting A2) and the rear wheel position B (for example, B1 in FIG. 2 or B2 in FIG. 6) is provided.

  The weighing platform 10 has a flat surface 11 having an area on which all the wheels 51 </ b> A to 51 </ b> D of the vehicle 5 to be weighed can be placed at the same time, and is further mounted on a front wheel that is raised by a predetermined height from the flat surface 11 at a position in front of the flat surface 11. The one provided with the base 12 is used. The flat surface 11 of the weighing platform 10 is a horizontal plane. Further, the height H (see FIGS. 2, 6, and 7) of the front wheel mount 12 from the flat surface 11 is determined when the front wheels 52A and 52B of the vehicle to be weighed 5 get on and off the front wheel mount 12. Although it is a thing which does not receive an excessive impact (uncomfortable feeling) and is not specifically limited, For example, it sets to the appropriate height H of the range of about 10-100 mm. In addition, when raising the step-up height of the front wheel mount 12, it is preferable to provide slopes at the front and rear edges of the front wheel mount 12.

  And in the state (state of FIG. 1, FIG. 2) in which all the wheels 51A-51D of the to-be-measured vehicle 5 are mounted on the flat surface 11 of the weighing platform 10, all the wheels 51A-51D are located in the same height. On the other hand, when the front wheels 51A and 51B of the vehicle to be weighed 5 are placed on the front wheel mount 12 of the weighing platform 10 (the states of FIGS. 5 and 6), the front wheels 51A and 51B (front wheel shaft 52A) are the rear wheels. 51C, 51D (rear wheel shaft 52B) is higher than the entire vehicle, and the entire vehicle is inclined downward by a slight angle θ.

  The wheel position detector 8 can detect the front wheel position and the rear wheel position of the to-be-measured vehicle 5 placed on the weighing platform 10, and uses a single distance sensor composed of an optical sensor. The wheel position detector 8 is a large angle in the front-rear horizontal direction as shown in FIGS. 1 and 5 at a fixed position that is the same as the wheel center height of the vehicle 5 to be measured at the left side position of the weighing platform 10. It swings within a range α (α = 150 ° to 160 °, for example), and the obstacles (the left wheels 51A and 51C) in the swing range are monitored. That is, the wheel position detector 8 is in a state where the vehicle to be weighed 5 is stopped on the weighing platform 10 (the stop position of the vehicle is unspecified in the front-rear direction and the left-right direction), for example, from the front side to the rear side As shown in FIG. 4, it is turned on when the front end 51Aa of the left front wheel 51A is detected, while it is turned off (non-detection) when it is removed from the rear end 51Ab of the left front wheel 51A. Similarly, it is turned on when the front end 51Ca of the left rear wheel 51C is detected, while it is turned off (not detected) when it is separated from the rear end 51Cb of the left rear wheel 51A. The front-rear swing range α of the wheel position detector 8 is the position of the front and rear wheels 51A, 51C regardless of the position of the vehicle to be weighed 5 in a wide range from the rear end to the front end on the weighing platform 10. Are set so as to be detected.

  As shown in FIG. 4, the wheel position detector 8 includes distances E1 to E4 from the wheel position detector 8 to the wheel detection position or the wheel non-detection position when the wheel position detector 8 is turned ON and OFF, respectively. , Each angle e1 to e4 with respect to the longitudinal extension line R of the wheel position detector 8 is detected, and each distance data (E1 to E4) and each angle data (e1 to e4) are described later. Are respectively output to the predetermined calculation means (in the case of the first embodiment of FIG. 9), the longitudinal displacement amount calculating means 20, the inter-axle distance calculating means 21, and the left / right displacement amount calculating means 27). The respective calculation methods in the longitudinal displacement amount calculating means 20, the inter-axle distance calculating means 21, and the lateral displacement amount calculating means 27 in FIG. 9 will be described later.

  Basic data related to the track scale 1 is registered (stored) in advance in the storage means (ROM) 31 of the computer 2. Of the basic data related to the track scale 1, it is related to the measurement of the vehicle center of gravity described later. From the wheel position detector 8 to the front and rear direction distances AL, BL from the wheel position detector 8 to the front and rear load cells 13A, 13C and the center extension line P between the left and right load cells 13A, 13B (or 13C, 13D). The vertical distance M in the horizontal direction and the height H of the front wheel mount 12 are stored in the storage means (ROM) 31 based on actual measurements. The storage means (ROM) 31 stores a data table related to trigonometric functions.

  Further, in the storage means (ROM) 31, when the to-be-measured vehicle 5 is a contract vehicle, basic data (plate number, empty vehicle weight, number of axles, distance D between the left and right wheels) of the vehicle is measured. The vertical distance 1 / 2D from the left and right wheels to the left and right center line Q of the vehicle 5 to be weighed) is also stored in advance in the storage means (ROM) 31, and by inputting the plate number of the vehicle at the time of weighing, Basic data of the vehicle 5 (the vertical distance 1 / 2D from the left and right wheels to the left and right center line Q can be called for calculating the left and right center of gravity position). In the case of a to-be-measured vehicle 5 that is not a contract vehicle (basic data is not registered), it is perpendicular to the left and right center line Q of the to-be-measured vehicle 5 from the left and right wheels based on the distance D between the left and right wheels before weighing. Information on the distance 1 / 2D is input.

  Next, the arithmetic processing devices 3 of the first to fifth embodiments shown in FIGS. 9 to 13 will be described individually.

[First Example of FIG. 9]
The arithmetic processing device 3 according to the first embodiment shown in FIG. 9 has various calculation means (see FIG. 9) for calculating the position of the center of gravity of the vehicle 5 to be weighed. That is, in this embodiment, the position of the center of gravity of the to-be-measured vehicle 5 can be calculated in the three-dimensional direction of the front-rear direction, the left-right direction, and the up-down direction.

  In the arithmetic processing unit 3 (FIG. 9), the front / rear displacement amount calculating means 20, the front wheel axle weight calculating means 23A, the rear wheel axle weight calculating means 23B, and the front / rear center of gravity position calculating means are provided as calculating means for calculating the front / rear center of gravity position. As the calculation means for calculating the center of gravity height position, the front-rear center-of-gravity position calculation means 24, the front-rear center-of-gravity displacement amount calculation means 25, the inter-axle distance calculation means 21, the vehicle inclination angle calculation means 22, and the vehicle center-of-gravity height are calculated. As the calculation means for calculating the left and right center of gravity position, the position calculation means 26 has a left and right displacement amount calculation means 27, a left wheel group wheel weight calculation means 28A, a right wheel group wheel weight calculation means 28B, and a left and right center of gravity position calculation means 29. have. Hereafter, each said calculation means is demonstrated in detail.

"Axle distance calculation means 21"
First, the inter-axle distance calculating means 21 will be described. The inter-axle distance calculating means 21 is a wheel position detector 8 as shown in FIG. 4 with the vehicle 5 to be weighed placed on the weighing platform 10. The distance L between the front and rear wheel shafts 52A and 52B of the to-be-measured vehicle 5 is calculated based on the detected distance data E1 to E4 and the angle data e1 to e4. In FIG. 4, the inter-axle distance L is the total distance of the longitudinal distance L1 from the wheel position detector 8 to the front wheel shaft 52A and the longitudinal distance L2 from the wheel position detector 8 to the rear wheel shaft 52B. The distances L1 and L2 are calculated by the inter-axle distance calculation means 21 based on the detection data from the wheel position detector 8 as follows.

  With the vehicle 5 to be weighed resting on the weighing platform 10, as shown in FIG. 4, the wheel position detector 8 swings from the front side so that the wheel position detector 8 moves to the front end 51Aa of the left front wheel 51A. Is detected, the distance data E1 from the wheel position detector 8 to the left front wheel front end 51Aa and the angle data e1 with respect to the longitudinal extension line R of the wheel position detector 8 are output to the inter-axle distance calculation means 21. Thus, the inter-axle distance calculating means 21 calculates the longitudinal distance L1a from the wheel position detector 8 to the left front wheel front end 51Aa (L1a = E1 × cose1). Next, when the wheel position detector 8 detects the rear end portion 51Ab of the left front wheel 51A, the distance data E2 and the same angle data e2 from the wheel position detector 8 to the left front wheel rear end portion 51Ab are similarly obtained. The distance between the axles is calculated, and the distance between the front and rear directions L1b from the wheel position detector 8 to the rear end 51Ab of the left front wheel is calculated (L1b = E2 × cose2). Then, by calculating (L1a + L1b) / 2 in the inter-axle distance calculating means 21, the longitudinal distance L1 from the wheel position detector 8 to the front wheel shaft 52A (position A1) is calculated.

  On the other hand, when the wheel position detector 8 swings further rearward and the wheel position detector 8 detects the front end 51Ca of the left rear wheel 51C, the left rear wheel front end from the wheel position detector 8 is detected. The distance data E3 to 51Ca and the same angle data e3 are output to the inter-axle distance calculating means 21, and the inter-axle distance calculating means 21 causes the longitudinal distance L2a from the wheel position detector 8 to the left rear wheel front end 51Ca. Is calculated (L2a = E3 × cose3). Next, when the wheel position detector 8 detects the rear end 51Cb of the left rear wheel 51C, similarly, the distance data E4 and the same angle data e4 from the wheel position detector 8 to the left rear wheel rear end 51Cb. Is output to the inter-axle distance calculating means 21, and the inter-axle distance calculating means 21 calculates the longitudinal distance L2b from the wheel position detector 8 to the left rear wheel rear end 51Cb (L2b = E4 × cose4). ). Then, by calculating (L2a + L2b) / 2 in the inter-axle distance calculating means 21, the longitudinal distance L2 from the wheel position detector 8 to the rear wheel shaft 52B is calculated.

  The inter-axle distance calculating means 21 calculates the inter-axle distance L by finally calculating L1 + L2.

  Each cos angle is read from the trigonometric function data table stored in the storage means (ROM) 31.

"Front / rear displacement amount calculating means 20"
The front-rear displacement amount calculating means 20 is configured so that the measured vehicle 5 is moved in the front-rear direction when the measured vehicle 5 is placed on the weighing platform 10 (in the case of FIGS. 1 and 2 and FIGS. 5 and 6). It is calculated how far it is displaced forward and backward with respect to the reference position (for example, the positions of the front and rear load cells 13A, 13C).

  The longitudinal distance AL from the wheel position detector 8 to the front load cell 13A and the longitudinal distance BL from the wheel position detector 8 to the rear load cell 13C are stored in the storage means (ROM) 31 in advance. .

  The longitudinal displacement amount calculating method by the longitudinal displacement amount calculating means 20 is performed as follows. First, when the vehicle to be weighed 5 is at the position shown in FIG. 2 (where all the wheels 51A to 51D are placed on the flat surface 11 of the weighing platform 10), the calculation method of the inter-axle distance L is used to support the wheel. A longitudinal distance L1 from the position detector 8 to the front wheel position A1 is calculated, and the distance L1 is subtracted from a longitudinal distance AL from the wheel position detector 8 to the front load cell 13A stored in the storage means (ROM) 31. While calculating the distance AL1 from the front wheel position A1 to the front load cell 13A, the distance L2 from the wheel position detector 8 to the rear wheel position B1 is similarly calculated and stored in the storage means (ROM) 31. A distance BL1 from the rear wheel position B1 to the rear load cell 13C is obtained by subtracting the distance L2 from the distance BL in the front-rear direction from the wheel position detector 8 to the rear load cell 13C. The longitudinal displacement calculation means 20 calculates the longitudinal displacement of the vehicle 5 to be measured on the weighing platform 10 by comparing the distances AL1 and BL1 (AL1: BL1). ing.

  When the vehicle 5 to be weighed is at the position shown in FIG. 6, the distance L3 in the front-rear direction from the wheel position detector 8 to the front wheel position A2 is calculated using the method for calculating the inter-axle distance L as described above. The distance L3 is subtracted from the longitudinal distance AL from the wheel position detector 8 to the front load cell 13A stored in the storage means (ROM) 31 to obtain the longitudinal distance AL2 from the front wheel position A1 to the front load cell 13A. On the other hand, the longitudinal distance L4 from the wheel position detector 8 to the rear wheel position B2 is calculated, and the longitudinal distance BL from the wheel position detector 8 to the rear load cell 13C stored in the storage means (ROM) 31 is calculated. Is subtracted from the distance L4 to obtain a distance BL2 from the rear wheel position B2 to the rear load cell 13C. The longitudinal displacement amount calculating means 20 can calculate the longitudinal displacement amount of the vehicle to be weighed 5 on the weighing platform 10 by comparing the distances AL2 and BL2 (AL2: BL2). ing.

"Front wheel axle weight calculating means 23A and rear wheel axle weight calculating means 23B"
The front wheel axle weight calculating means 23A and the rear wheel axle weight calculating means 23B are configured so that the front wheel axle is based on the detected values Wa to Wd from the load cells 13A to 13D when the vehicle 5 is placed on the weighing platform 10. The weight (AW1 or AW2) and the rear wheel axle weight (BW1 or BW2) are respectively calculated.

  In the following description, the weight detected by the left front load cell 13A is Wa, the weight detected by the right front load cell 13B is Wb, the weight detected by the left rear load cell 13C is Wc, and the weight detected by the right rear load cell 13D is Although it is set as Wd, each detected weight Wa-Wd detected by each load cell 13A-13D changes with the riding position to the weighing platform 10 of the to-be-measured vehicle 5, respectively. In FIG. 2 (all wheels 51A to 51D are placed on the flat surface 11), the symbol AW1 indicates the total of the detected weights Wa and Wb (FIG. 1) of the left and right front load cells 13A and 13B. The sign BW1 represents the rear wheel axle weight as the sum of the detected weights Wc and Wd in the left and right rear load cells 13C and 13D. In FIG. 6 (the front wheels 51A and 51B are mounted on the front wheel mount 12), the symbol AW2 is the total of the detected weights Wa and Wb (FIG. 6) of the left and right front load cells 13A and 13B. The sign BW2 represents the rear wheel axle weight as the sum of the detected weights Wc and Wd in the left and right rear load cells 13C and 13D.

  Then, the front wheel axle weight calculation means 23A sums the detected weight Wa at the left front load cell 13A and the detected weight Wb at the right front load cell 13B, so that the front wheel axle weight of the to-be-measured vehicle 5 at the current position (FIG. 2). The weight AW1 in the state and the weight AW2 in the state of FIG. 6 are calculated, and the rear wheel axle weight calculation means 23B sums the detected weight Wc in the left rear load cell 13C and the detected weight Wd in the right rear load cell 13D. The rear wheel axle weight (weight BW1 in the state of FIG. 2, weight BW2 in the state of FIG. 6) at the current position is calculated.

"Front / rear center of gravity position calculation means 24"
The front / rear center-of-gravity position calculating means 24 includes a front wheel axle weight (AW1 in FIG. 2 or AW2 in FIG. 6) and a rear wheel axle weight (FIG. 2) calculated by the front wheel axle weight calculating means 23A and the rear wheel axle weight calculating means 23B, respectively. BW1 of FIG. 6 or BW2 of FIG. 6) and the amount of longitudinal displacement of the to-be-measured vehicle 5 calculated by the longitudinal displacement amount calculating means 20 (AL1: BL1 in FIG. 2 or AL2: BL2 in FIG. 6) The front-rear center-of-gravity position G (or G ′) of the vehicle 5 to be weighed placed on the table 10 is obtained.

  The front / rear center-of-gravity position calculating means 24 performs the following calculations in the state of FIG. 2 and the state of FIG.

  First, in the state of FIG. 2, by calculating AW1 / (AW1 + BW1), it is possible to calculate the position of the center of gravity G of the to-be-measured vehicle 5 in the front-rear direction on the weighing platform 10 from the front load cell 13A. By subtracting the distance AL1 from the front load cell 13A to the front wheel shaft 52A previously determined by the longitudinal displacement amount calculating means 20 from the distance (AL1 + AG) from the front load cell 13A to the center of gravity G on the platform 10, the vehicle to be weighed The front-rear distance AG from the front wheel shaft 52A to the gravity center position G in FIG.

  Similarly, in FIG. 2, BW1 / (AW1 + BW1) is calculated (the center of gravity G is calculated to be the longitudinal distance of BL1 + BG from the rear load cell 13C), and the longitudinal displacement amount calculating means 20 is preceded by the calculated distance. By subtracting the longitudinal distance BL1 from the rear load cell 13C to the rear wheel shaft 52B obtained in the above, the longitudinal distance BG from the rear wheel shaft 52B to the center of gravity position G in the to-be-measured vehicle 5 can be calculated.

  The front / rear center-of-gravity position calculating means 24 calculates AG / (AG + BG) and BG / (AG + BG) from the AG and BG in the state shown in FIG. It can be calculated which position (AG: BG) in the front-rear direction between the wheel shafts 52A and 52B.

  The front / rear center-of-gravity position information (AG: BG) calculated by the front-rear center-of-gravity position calculation unit 24 in the state of FIG. 2 is stored in the storage unit (RAM) 32 and a later-described center-of-gravity height position calculation is performed. Used as information for. The front-rear center-of-gravity position display may be represented by calculated values of AG / (AG + BG) or BG / (AG + BG).

  On the other hand, in the state of FIG. 6, by calculating AW2 / (AW2 + BW2), it is possible to calculate the position of the center of gravity G 'of the to-be-measured vehicle 5 in the front-rear direction on the weighing platform 10 from the front load cell 13A. By subtracting the distance AL2 from the front load cell 13A to the front wheel shaft 52A previously obtained by the longitudinal displacement amount calculating means 20 from the distance (AL2 + AG ') from the front load cell 13A to the center of gravity G' on the weighing platform 10. The front-rear distance AG ′ from the front wheel shaft 52A to the gravity center position G ′ in the to-be-measured vehicle 5 can be calculated.

  Similarly, in FIG. 6, BW2 / (AW2 + BW2) is calculated (the center of gravity G 'is calculated to be at a distance of BL2 + BG' from the rear load cell 13C), and the longitudinal displacement amount calculating means is first calculated from the calculated distance. By subtracting the front / rear distance BL2 from the rear load cell 13C to the rear wheel shaft 52B obtained at 20, the front / rear distance BG 'from the rear wheel shaft 52B to the center of gravity position G' in the to-be-measured vehicle 5 can be calculated.

  The front / rear center-of-gravity position calculating means 24 calculates AG ′ / (AG ′ + BG ′) and BG ′ / (AG ′ + BG ′) from the above AG ′ and BG ′ in the state of FIG. It is possible to calculate which position (AG ′: BG ′) in the front-rear direction between the front and rear wheel shafts 52A and 52B is located at the center of gravity G ′ of the vehicle 5 to be weighed. The front-rear center-of-gravity position display may be expressed by each calculated value of AG ′ / (AG ′ + BG ′) or BG ′ / (AG ′ + BG ′).

  In the state where the front wheels 51A and 51B are placed on the front wheel mount 12 (the state shown in FIG. 6), the to-be-measured vehicle 5 is slightly lowered and inclined backward, so that the horizontal front-rear direction in the state shown in FIG. The distance between the axles (AG ′ + BG ′) is slightly shorter than the distance between the axles L (AG + BG) in the state of FIG.

"Vehicle tilt angle calculation means 22"
As shown in FIGS. 5 and 6, the vehicle inclination angle calculation means 22 is configured such that the vehicle inclination angle θ in the state where the front wheels 51 </ b> A and 51 </ b> B of the to-be-measured vehicle 5 are placed on the front wheel platform 12 of the weighing platform 10 (FIG. 6 and FIG. 7).

  The vehicle inclination angle calculating means 22 is such that the straight line connecting the lower end surface of the front wheel 51A resting on the front wheel mount 12 and the lower end surface of the rear wheel 51C resting on the flat surface 11 is actually horizontal. This is a calculation for how much it is inclined in the front-rear direction with respect to the flat surface 11, which is necessary for calculating a vehicle center-of-gravity height position, which will be described later.

In this vehicle inclination angle calculation means 22, from the inter-axle distance L previously calculated by the inter-axle distance calculation means 21 and the height H of the front wheel mount 12 stored in the storage means (ROM) 31 in advance.
The sin angle (θ) corresponding to H / L is obtained from the trigonometric function data table stored in the storage means (ROM) 31. The vehicle inclination angle θ calculated by the vehicle inclination angle calculation means 22 is necessary for obtaining the center of gravity height position of the vehicle 5 to be measured, and is used by the vehicle center of gravity height position calculation means 26 described later. The

"Front / rear center-of-gravity displacement calculating means 25"
The front / rear center-of-gravity displacement calculating means 25 is newly calculated in the state of FIG. 6 and the front / rear center-of-gravity position information (for example, the front-rear distance of BG) stored in the storage means (RAM) 32 in FIG. Compared with the front-rear center-of-gravity position information (for example, the front-rear distance of BG ′), the center-of-gravity displacement amount T (BG-BG ′) in the front-rear direction is calculated as shown in FIG.

  Note that the front-rear center of gravity position G ′ in the state of FIG. 6 is such that the front wheels 51A and 51B are placed on the front wheel mount 12 (the vehicle is inclined downward), so that all the wheels 51A to 51D The vehicle is displaced rearward by the vehicle inclination angle θ from the front-rear center of gravity position G (FIG. 2) when it is placed on the flat surface 11, but at this time, a center-of-gravity displacement amount indicated by reference numeral T in FIG. .

“Vehicle center of gravity height position calculation means 26”
The vehicle center-of-gravity height position calculating unit 26 includes the front-rear center-of-gravity displacement amount T (BG-BG ′ in FIG. 7) calculated by the front-rear center-of-gravity displacement amount calculating unit 25 and the vehicle inclination calculated by the vehicle inclination angle calculating unit 22. The center-of-gravity height position G1 (FIG. 7) of the to-be-measured vehicle 5 is calculated based on the angle θ.

  A specific method of calculating the center of gravity height position G1 (FIG. 7) by the vehicle center of gravity height position calculating means 26 is as follows.

  In other words, the vehicle center-of-gravity height position calculating unit 26 calculates the front-rear center-of-gravity displacement amount T (BG-BG ′ in FIG. 7) calculated by the front-rear center-of-gravity displacement calculation unit 25 and the vehicle inclination angle calculation unit 22. The center of gravity height position G1 to be obtained can be calculated by the formula of T / tan θ. Note that tan θ is read from the trigonometric function data table stored in the storage means (ROM) 31.

"Left-right displacement amount calculating means 27"
The left / right displacement amount calculating means 27 calculates how much the to-be-measured vehicle 5 placed on the weighing platform 10 is displaced to the left and right with respect to the weighing platform 10. As the basic data required for calculation by 27, the vertical distance M in the horizontal direction from the wheel position detector 8 with respect to the center extension line P between the two load cells 13A, 13B (or 13C, 13D) located on the left and right, and the vehicle to be weighed Information on the vertical distance 1 / 2D from the left and right wheels to the left and right center line Q based on the distance D between the left and right wheels 51A, 51B (or 51C, 51D) ) 31.

  The left / right displacement amount calculating means 27 determines how much the left / right center line Q of the to-be-measured vehicle 5 placed on the weighing platform 10 is displaced to the left / right with respect to the center extension line P between the left / right load cells. The left-right displacement amount S is calculated, and is calculated by the following procedure.

  First, as shown in FIG. 4, when the left wheel 51A (or 51C) is detected by the wheel position detector 8, the distance from the wheel position detector 8 to the wheel detection position (explained by the left front wheel front end 51Aa). Based on the data E1 and the angle data e1 with respect to the longitudinal extension line R of the wheel position detector 8 at that time, the vertical distance N1 from the left front wheel front end 51Aa to the longitudinal extension line R of the wheel position detector 8 is calculated. This vertical distance N1 can be calculated by N1 = E1 × sine1. Note that sin1 is read from the trigonometric data table stored in the storage means (ROM) 31.

  Then, in the left / right displacement calculation means 27, the distance N from the front / rear extension line R of the wheel position detector 8 to the left / right center line Q of the to-be-measured vehicle 5 placed on the weighing platform 10 by the above N1 + 1 / 2D. Further, based on the distance N and the distance M between the center extension line P between the left and right load cells stored in the storage means (ROM) 31 and the front and rear extension line R of the wheel position detector 8, M By calculating -N, how much the to-be-measured vehicle 5 (left and right center line Q) placed on the weighing platform 10 is displaced to the left and right with respect to the center extension line P between the left and right load cells (left and right displacement amount S). It is possible to calculate whether or not. When N is larger than M (M <N), the left / right center line Q of the to-be-measured vehicle 5 is set to the left / right center line P between the left and right load cells with reference to the front / rear extension line R of the wheel position detector 8. It means that it is located on the far side, and the left-right displacement amount S is a negative (-) value.

"Left wheel group wheel weight calculation means 28A"
The left wheel group wheel weight calculating means 28A adds the detected values Wa and Wc from the left front load cell 13A and the left rear load cell 13C when the vehicle 5 to be weighed is placed on the weighing platform 10 (Wa + Wc). The total wheel load of the left wheel group (51A and 51C) in the weighing vehicle 5 is calculated. The sum of the detection values Wa and Wc (FIG. 1) from the left front load cell 13A and the left rear load cell 13C is indicated as LW in FIG.

"Right wheel group wheel weight calculation means 28B"
This right wheel group wheel weight calculating means 28B adds together the detected values Wb, Wd from the right front load cell 13B and the right rear load cell 13D when the vehicle 5 to be weighed is placed on the weighing platform 10 (Wb + Wd). The total wheel load of the right wheel group (51B and 51D) in the to-be-measured vehicle 5 is calculated. The sum of the detection values Wa and Wc (FIG. 1) from the right front load cell 13B and the right rear load cell 13D is indicated as RW in FIG.

"Left / right center of gravity position calculation means 29"
The left and right center-of-gravity position calculating means 29 includes the left and right total wheel weights (Wa + Wc = LW and Wb + Wd = RW) calculated by the left wheel group wheel weight calculating means 28A and the right wheel group wheel weight calculating means 28B, and the left and right displacement amount. The position of the center of gravity G of the vehicle in the left-right direction of the vehicle is calculated from the left-right displacement amount S calculated by the calculating means 27.

  That is, in the state shown in FIG. 3, the left / right center-of-gravity position calculating means 29 determines the left / right distance LL from the center of gravity G to the left load cell 13C and the right load cell from the center of gravity G according to the ratio of the left and right total wheel loads (LW: RW). By calculating the left-right distance RL up to 13D, and further calculating the left-right displacement amount S1 from the left-right center line P to the center of gravity G of the weighing platform 10 by (LL-RL) / 2, and calculating S + S1, A lateral displacement distance G2 from the lateral center line Q of the vehicle 5 to the center of gravity G is calculated.

  In order to display the position of the center of gravity of the vehicle 5 to be measured on the display 33, it may be represented by the above-mentioned left-right displacement distance G2 from the left-right center line Q of the vehicle. The left and right distances LG and RG from the left and right wheels 51C and 51D to the center of gravity G may be converted and expressed.

  The vehicle center-of-gravity position measuring apparatus of the first embodiment (FIG. 9) functions as follows. In the truck scale 1 of this embodiment, the vehicle to be weighed 5 enters the weighing platform 10 from the rear side in FIG.

  As shown in FIGS. 1 and 2, the detection values Wa to Wd from the load cells 13 </ b> A to 13 </ b> D in a state where all the wheels 51 </ b> A to 51 </ b> D of the to-be-measured vehicle 5 are placed on the flat surface 11 of the weighing platform 10. On the other hand, the total weight of the to-be-measured vehicle 5 is measured by the arithmetic processing unit 3, while the front and rear center-of-gravity position and the left and right center-of-gravity position of the to-be-measured vehicle 5 are first calculated by the vehicle center-of-gravity position measuring device shown in FIG.

  That is, the front / rear center of gravity position of the to-be-measured vehicle 5 is calculated based on the front / rear displacement amount calculating means 20 based on the wheel position information from the wheel position detector 8, the front wheel axle weight calculating means 23A and the rear From the front wheel axle weight AW1 and the rear wheel axle weight BW1 calculated by the wheel axle weight calculating means 23B, the front / rear center of gravity position calculating means 24 calculates as described above. The front / rear center-of-gravity position information (AG: BG) or AG / (AG + BG) calculated by the front / rear center-of-gravity position calculation unit 24 is stored for output to the display unit 33 and data for calculating the center-of-gravity height position. (RAM) 32.

  Further, the left and right center of gravity position of the to-be-measured vehicle 5 is calculated by calculating the left and right displacement amount calculated by the left and right displacement amount calculating means 27 based on the wheel position information from the wheel position detector 8, the left wheel group wheel weight calculating means 28A, From the left wheel group wheel weight LW and the right wheel group wheel weight RW respectively calculated by the right wheel group wheel weight calculating means 28B, the left and right center of gravity position calculating means 29 calculates as described above. Note that the left / right center of gravity position information (LG: RG) calculated by the left / right center of gravity position calculating means 29 is also stored in the storage means (RAM) 32 for output to the display 33.

  And in order to measure the center-of-gravity height position G1 (FIG. 7) of the to-be-measured vehicle 5, the to-be-measured vehicle 5 is advanced from the flat surface 11 shown in FIG.1 and FIG.2, and it shows to FIG.5 and FIG.6. In this manner, the front wheels 51A and 51B are stopped in a state where they are placed on the front wheel mounting base 12.

  Then, the front / rear center-of-gravity position calculation means 24 newly calculates the front / rear center-of-gravity position of the vehicle 5 whose front wheels are on the front wheel mount 12, and stores the new front / rear center-of-gravity position information (AG ′: BG ′) and the storage means 32. The front-rear center of gravity displacement amount T is calculated by the front-rear center-of-gravity center-of-gravity displacement amount calculation means 25 by comparing the previous front-rear center-of-gravity position information (AG: BG). The vehicle center-of-gravity height position G1 (FIG. 7) can be calculated by the vehicle center-of-gravity height position calculation means 26 based on the vehicle inclination angle θ in the state of being placed on the vehicle.

  As described above, in the center-of-gravity position measuring apparatus according to the first embodiment, the front wheel mounting base that is stepped up by a predetermined height to the front position of the weighing base (flat surface 11) is used to calculate the center-of-gravity height position of the vehicle 5 to be weighed. 12 is necessary, but the front wheel mount 12 has a very simple configuration. Further, the front and rear wheel positions can be detected by the wheel position detector 8 relatively easily. In the other configuration, the above-mentioned various calculation means need only be incorporated into the arithmetic processing unit 3, so that the center-of-gravity height position (G1 in FIG. 7) of the vehicle to be measured can be measured with a simple configuration as a whole. is there.

  In the center-of-gravity position measuring apparatus of the first embodiment (FIG. 9), the arithmetic processing unit 3 is provided with the inter-axle distance calculating means 21 for calculating the distance between the front and rear axles. The distance L between the front and rear axles necessary for calculating the position can be automatically calculated by the distance calculation means 21 between the axles.

[Second Example of FIG. 10]
The vehicle center-of-gravity position measuring apparatus according to the second embodiment shown in FIG. 10 can be applied when the distance L between the axles before and after the to-be-measured vehicle 5 is known in advance.

  The vehicle center of gravity position measuring apparatus of the second embodiment (FIG. 10) is replaced with the axle distance calculating means 21 in the vehicle center of gravity position measuring apparatus of the first embodiment (FIG. 9). The inter-axle distance L (for example, the distance L in FIG. 2) of the weighing vehicle 5 is stored in the inter-axle distance storage means 211, and the inter-axle distance L stored in the inter-axle distance storage means 211 is stored in the vehicle inclination angle calculation means. 22 is used for calculating the vehicle inclination angle. The remaining structure of the vehicle gravity center position measuring apparatus of the second embodiment (FIG. 10) is substantially the same as that of the first embodiment (FIG. 9).

  In the vehicle center-of-gravity position measuring apparatus according to the second embodiment, when the vehicle to be weighed 5 is a registered vehicle, the distance L between the front and rear axles is stored in advance together with other data, and the vehicle to be weighed 5 is a non-registered vehicle. Is input from the input device (keyboard in FIG. 8) 34 and stored in the inter-axle distance storage means 211 in each case immediately before weighing. .

  In the vehicle center-of-gravity position measuring apparatus according to the second embodiment, the method for obtaining the information about the inter-axle distance L of the to-be-measured vehicle 5 is different from that in the first embodiment. A calculation process similar to that of the first embodiment is performed so that the position of the center of gravity of the to-be-measured vehicle 5 can be represented three-dimensionally in the front-rear direction, the left-right direction, and the upper-lower direction.

  Further, in the vehicle center-of-gravity position measuring apparatus of the second embodiment (FIG. 10), the accurate distance between axles L (actually measured value) that is known in advance is inputted and stored in the distance between axle storage means 211. As in the first embodiment (FIG. 9), a more accurate axle than in the case where the inter-axle distance calculation means 21 calculates based on the wheel position information from the wheel position detector 8 (a detection error may occur). Distance data can be provided.

  Therefore, in the center-of-gravity position measuring apparatus according to the second embodiment, since the inter-axle distance L that is the basis of the vehicle inclination angle θ calculated by the vehicle inclination angle calculation means 22 is accurate, the highly reliable vehicle inclination angle θ. The vehicle center-of-gravity height position G1 (FIGS. 3 and 7) calculated by the vehicle center-of-gravity height position calculation unit 26 based on the calculated value is highly reliable.

[Third Example of FIG. 11]
In the vehicle center-of-gravity position measuring apparatus according to the third embodiment shown in FIG. 11, the front and rear axle weights (front wheel axle weight and rear wheel axle weight) of the to-be-measured vehicle 5 are separated from the truck scale 1 (for example, a mat scale). This can be applied to the case of measuring with ().

  The vehicle center-of-gravity position measuring apparatus of the third embodiment (FIG. 11) replaces the front wheel axle weight calculating means 23A and the rear wheel axle weight calculating means 23B in the first embodiment (FIG. 9) with the vehicle 5 to be weighed. The front wheel axle weight and the rear wheel axle weight are measured with a separate axle weight meter, and the front wheel axle weight and the rear wheel axle weight measured with the axle weight meter are input to the input device (Fig. 8 keyboard) 34 and stored in the front wheel axle load storage means 231A and the rear wheel axle load storage means 231B, respectively. In this case, since the front wheel axle weight and the rear wheel axle weight are measured by a separate axle weight meter, there is no need to calculate the front and rear axle weights in the arithmetic processing unit 3. The other configurations of the vehicle gravity center position measuring apparatus of the third embodiment (FIG. 11) are substantially the same as those of the first embodiment (FIG. 9).

  In the vehicle center-of-gravity position measuring apparatus according to the third embodiment, when the vehicle to be weighed 5 is weighed on the weighing platform 10, the vehicle to be weighed 5 stored in the front wheel axle weight storage means 231A and the rear wheel axle weight storage means 231B, respectively. From the front wheel axle weight and the rear wheel axle weight and the longitudinal displacement amount calculated by the longitudinal displacement amount calculating means 20 based on the wheel position information from the wheel position detector 8, the longitudinal center-of-gravity position calculating means 24 calculates the vehicle 5 to be weighed. The position of the center of gravity before and after is calculated.

  In the vehicle center-of-gravity position measuring apparatus according to the third embodiment, the method for obtaining information about the front and rear axles of the vehicle 5 to be weighed is different from that of the first embodiment. A calculation process similar to that of the first embodiment is performed so that the position of the center of gravity of the to-be-measured vehicle 5 can be represented three-dimensionally in the front-rear direction, the left-right direction, and the upper-lower direction.

  In the vehicle center-of-gravity position measuring apparatus of the third embodiment, the front wheel axle weight and the rear wheel axle weight of the to-be-measured vehicle 5 are measured by separate axle weight meters, and the front and rear wheel weights are respectively stored in the front wheel axle weight storage. Since it is stored in the means 231A and the rear wheel axle load storage means 231B, it is not necessary to calculate the front and rear axle weights by the arithmetic processing unit 3 during actual weighing on the weighing platform 10, and accordingly, the arithmetic processing unit 3 The configuration can be simplified.

[Fourth embodiment of FIG. 12]
In the vehicle center-of-gravity position measuring apparatus of the fourth embodiment shown in FIG. 12, the inter-axle distance calculation means 21 in the first embodiment (FIG. 9) is used as the inter-axle distance storage means 211 of the second embodiment (FIG. 10). In addition, the front wheel axle weight calculating means 23A and the rear wheel axle weight calculating means 23B in the first embodiment (FIG. 9) are replaced with the front wheel axle weight storage means 231A and the rear wheel axle in the third embodiment (FIG. 11). It is changed to the double storage means 231B.

  That is, the vehicle center-of-gravity position measuring apparatus of the fourth embodiment employs an inter-axle distance storage means 211 in place of the inter-axle distance calculation means 21 provided in the arithmetic processing unit 3 of the first embodiment (FIG. 9). The axle distance (actually measured value) of the to-be-measured vehicle 5 known in advance is stored in the axle distance storage means 211, while the front wheel axle weight provided in the arithmetic processing unit 3 of the first embodiment (FIG. 9). Instead of the calculation means 23A and the rear wheel axle weight calculation means 23B, a front wheel axle weight storage means 231A and a rear wheel axle weight storage means 231B are adopted, and the front wheel axle weight and the rear wheel axle weight measured by a separate axle weight meter are respectively forwarded. The wheel axle weight storage means 231A and the rear wheel axle weight storage means 231B are stored.

  And in the vehicle gravity center position measuring apparatus of this 4th Example, it shows to FIG.5 and FIG.6 based on the distance information between axles memorize | stored in the distance storage means 211 between axles at the time of the measurement of the to-be-measured vehicle 5. FIG. As described above, the vehicle inclination angle θ when the front wheels 51A and 51B are placed on the front wheel mount 12 of the weighing platform 10 is calculated by the vehicle inclination angle calculation means 22, while the front wheel axle load storage means 231A and the rear wheel axle load storage means 231B. The front / rear center of gravity position calculation means 24 calculates the front / rear center of gravity position of the to-be-measured vehicle 5 from the front wheel axle weight and rear wheel axle weight respectively stored in FIG. ing. The remaining structure of the fourth embodiment is substantially the same as that of the first embodiment (FIG. 9).

  In the vehicle center-of-gravity position measuring apparatus according to the fourth embodiment, the information about the inter-axle distance and the information about the front wheel axle weight and the rear wheel axle weight in the to-be-measured vehicle 5 with respect to the first embodiment (FIG. 9). However, the calculation processing device 3 performs the same calculation process as in the first embodiment, and the center of gravity position of the to-be-measured vehicle 5 can be represented three-dimensionally in the front, rear, left, and right directions. It is like that.

  In the vehicle center-of-gravity position measuring apparatus according to the fourth embodiment, it is not necessary to calculate the inter-axle distance and the front and rear axle weights by the arithmetic processing unit 3 during actual weighing on the weighing platform 10, and the arithmetic processing unit accordingly. The configuration of 3 can be further simplified.

[Fifth embodiment of FIG. 13]
The vehicle center-of-gravity position measuring apparatus of the fifth embodiment shown in FIG. 13 can be applied to the case where the center-of-gravity position of the to-be-measured vehicle 5 of the same vehicle type with the same distance L between the front and rear axles is measured.

  In the vehicle center-of-gravity position measuring apparatus of the fifth embodiment (FIG. 13), the vehicle inclination angle calculating means 22 in the vehicle center-of-gravity position measuring apparatus of the first to fourth embodiments (FIGS. 9 to 12) is used. The calculated vehicle inclination angle θ is obtained from the inter-axle distance L (actual value) of the to-be-measured vehicle 5 and the raised height H (actual value) of the front wheel platform 12 of the weighing platform 10 which are invariable data. The vehicle inclination angle θ stored in advance in the vehicle inclination angle storage means 221 (FIG. 13) and stored in the vehicle inclination angle storage means 221 is used by the vehicle gravity center height position calculation means 26 to calculate the vehicle gravity center height position. We are using. The remaining structure of the vehicle gravity center position measuring apparatus according to the fifth embodiment is substantially the same as that of the first embodiment (FIG. 9) or the second embodiment (FIG. 10).

  In the vehicle center-of-gravity position measuring apparatus of the fifth embodiment (FIG. 13), the center-of-gravity height position G1 (FIGS. 3 and 7) for each vehicle in the to-be-measured vehicle 5 having the same front-rear axle distance L is measured. In this case, since the distance L between the axles of each of the to-be-measured vehicles 5 is the same, the distance L between the axles which is invariable data and the height H of the front wheel mount 12 (each measured value). Thus, the vehicle inclination angle θ in a state where the front wheels 51A and 51B are mounted on the front wheel mount 12 is obtained, and the vehicle inclination angle θ is stored in the vehicle inclination angle storage means 221.

  In the vehicle center-of-gravity position measuring apparatus of the fifth embodiment (FIG. 13), the method for obtaining the information related to the vehicle inclination angle θ in the first to fourth embodiments (FIGS. 9 to 12) is different. In other respects, the arithmetic processing unit 3 performs the same calculation process as in the first to fourth embodiments so that the position of the center of gravity of the to-be-measured vehicle 5 can be represented three-dimensionally in the front, rear, left, and right directions. It has become.

  In the fifth embodiment of FIG. 13, the vehicle inclination angle storage means 221 is incorporated in the first embodiment (FIG. 9), but the second to fourth embodiments (FIGS. 10 to 12). It can also be incorporated into any of these.

  In the vehicle center-of-gravity position measuring apparatus of the fifth embodiment, the vehicle inclination angle θ (FIGS. 6 and 7) when the front wheels 51A and 51B are placed on the front wheel mount 12 is the invariable data 5 which is invariant data. The vehicle inclination angle storage means 221 is obtained from the distance L between the axles (actual measurement value) and the raised height H (actual measurement value) of the front wheel platform 12 of the weighing platform, and is stored in the vehicle inclination angle storage means 221. The vehicle inclination angle θ stored in 221 is accurate because it is obtained from the inter-axle distance L and the front wheel mount height H based on the actually measured values.

  Therefore, in the vehicle center-of-gravity position measuring apparatus of the fifth embodiment (FIG. 13), only the to-be-measured vehicle 5 having the same distance L between the axles can be applied, but the vehicle inclination angle θ stored in the vehicle inclination angle storage means 221 is accurate. Therefore, the calculated value of the vehicle center of gravity height position G1 (FIGS. 3 and 7) finally calculated by the vehicle center of gravity height position calculating means 26 becomes highly reliable.

  By the way, as in the first to fifth embodiments, knowing the center-of-gravity position G of a vehicle can predict the risk of rollover of the vehicle when traveling on the road, and the current vehicle is safe for rollover. It is possible to know in advance whether or not

  In the center-of-gravity position measurement device of each embodiment of the present application, the center-of-gravity position G of the vehicle 5 to be weighed can be calculated three-dimensionally in the front-rear, left-right, and up-down directions. I can grasp.

  In each embodiment of the present application, the wheel position detector 8 is installed only on one side of the weighing platform 10 to detect only the wheel position on the left and right sides. In other embodiments, the wheel position detection is performed. The container 8 can be installed on both the left and right sides (two in total) of the weighing table 10. In that case (when two wheel position detectors 8 are used on the left and right), since the position information of the left and right wheels can be detected from the left and right sides, the left and right displacement amount S of the to-be-measured vehicle 5 on the weighing table 10 is calculated. However, it is not necessary to store the distance D between the left and right wheels in the storage means (ROM) 31 in advance.

  In each of the above-described embodiments, the two to-be-measured vehicles 5 (total of four wheels) are employed as the vehicle to be weighed. The center-of-gravity position G of the to-be-measured vehicle 5 can be calculated three-dimensionally based on the basic idea. In a vehicle having three or more axes, the detection target wheels in the wheel position detector 8 are those of the front and rear wheels.

  In addition, in the case where a pair of load cells is added between the front and rear (for example, using six load cells), the weight value detected by the load cell located in the middle of the load cell is the weight detected by either of the front and rear load cells. Various calculations are performed by adding to the value.

  1 is a truck scale, 2 is a computer, 3 is an arithmetic processing unit, 5 is a vehicle to be weighed, 8 is a wheel position detector, 10 is a weighing platform, 11 is a flat surface, 12 is a front wheel platform, 13A to 13D are load cells, 20 is a front-rear displacement amount calculating means, 21 is an inter-axle distance calculating means, 22 is a vehicle inclination angle calculating means, 23A is a front wheel axle weight calculating means, 23B is a rear wheel axle weight calculating means, 24 is a front / rear center of gravity position calculating means, and 25 is Front-rear center-of-gravity displacement calculation means 26, vehicle center-of-gravity height position calculation means 27, left-right displacement amount calculation means 28A, left wheel group wheel weight calculation means 28B, right wheel group wheel weight calculation means 29, left-right center of gravity position calculation Means 31 is storage means (ROM), 32 is storage means (RAM), 51A to 51D are wheels, 52A and 52B are wheel axles, 211 is an axle distance storage means, 221 is a vehicle inclination angle storage means, and 231A is a front wheel. Weight storage means, 231B rear wheel axle load storage means, A1, A2 is the front wheel position, B1, B2 is the rear wheel position.

Claims (6)

Detection from each load cell (13A to 13D) when load cells (13A to 13D) are provided on the lower surfaces near the four corners of the weighing table (10) and the vehicle to be weighed (5) is placed on the weighing table (10). In a truck scale in which the weight of the vehicle to be weighed (5) can be measured by the arithmetic processing unit (3) based on the value,
The weighing platform (10) includes a flat surface (11) having an area where all the wheels (51A to 51D) of the vehicle to be weighed (5) can be placed simultaneously, and the flat surface (11) at a position in front of the flat surface (11). While using the one provided with the front wheel mount (12) raised by a predetermined height,
A wheel position detector (8) capable of detecting the front wheel position and the rear wheel position of the vehicle to be weighed (5) placed on the weighing platform (10);
The arithmetic processing unit (3)
Based on the wheel position information from the wheel position detector (8) when the vehicle to be weighed (5) is placed on the weighing platform (10), the vehicle to be weighed (5) moves back and forth from the reference position in the front-rear direction. A longitudinal displacement amount calculating means (20) for calculating how much the displacement is;
An inter-axle distance calculating means (21) for calculating a distance (L) between the front and rear axles from the front wheel position and the rear wheel position detected by the wheel position detector (8);
When the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12), the inter-axle distance (L) calculated by the inter-axle distance calculating means (21) and the front wheel mounting Vehicle inclination angle calculation means (22) for calculating the front and rear inclination angle (θ) of the vehicle to be weighed (5) from the height (H) of the platform (12);
Front wheel axle weight calculating means (23A) and rear wheel axle weight calculating means for calculating the front wheel axle weight and the rear wheel axle weight at the current position based on the detected values (Wa to Wd) from the load cells (13A to 13D). (23B)
From the front wheel axle weight and rear wheel axle weight calculated by the front wheel axle weight calculating means (23A) and the rear wheel axle weight calculating means (23B), respectively, and the longitudinal displacement calculated by the longitudinal displacement calculating means (20). Front-rear center-of-gravity position calculating means (24) for calculating at which position in the vehicle front-rear direction the vehicle center-of-gravity position (G or G ′) is;
Storage for storing front / rear center-of-gravity position information calculated by the front / rear center-of-gravity position calculation means (24) in a state where all the wheels of the vehicle to be weighed (5) are placed on the flat surface (11) of the weighing platform (10). Means (32);
Front / rear center of gravity position information newly calculated by the front / rear center of gravity position calculating means (24) in a state where the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12) and the memory A longitudinal centroid displacement amount calculating means (25) for comparing the longitudinal centroid position information on the flat surface (11) stored in the means (32) and calculating the longitudinal centroid displacement amount (T);
The vehicle to be weighed (5) based on the front / rear center-of-gravity displacement amount (T) calculated by the front / rear center-of-gravity displacement amount calculation means (25) and the vehicle inclination angle (θ) calculated by the vehicle inclination angle calculation means (22). Vehicle gravity center height position calculating means (26) for calculating the gravity center height position (G1) of
Each with
An apparatus for measuring the center of gravity of a vehicle to be weighed on a truck scale. Detection from each load cell (13A to 13D) when load cells (13A to 13D) are provided on the lower surfaces near the four corners of the weighing table (10) and the vehicle to be weighed (5) is placed on the weighing table (10). In a truck scale in which the weight of the vehicle to be weighed (5) can be measured by the arithmetic processing unit (3) based on the value,
The weighing platform (10) includes a flat surface (11) having an area where all the wheels (51A to 51D) of the vehicle to be weighed (5) can be placed simultaneously, and the flat surface (11) at a position in front of the flat surface (11). While using the one provided with the front wheel mount (12) raised by a predetermined height,
A wheel position detector (8) capable of detecting the front wheel position and the rear wheel position of the vehicle to be weighed (5) placed on the weighing platform (10);
Axle distance storage means (211) for storing the distance (L) between the axles of the to-be-measured vehicle (5) when the distance (L) between the front and rear axles of the to-be-measured vehicle (5) is known in advance. )
The arithmetic processing unit (3)
Based on the wheel position information from the wheel position detector (8) when the vehicle to be weighed (5) is placed on the weighing platform (10), the vehicle to be weighed (5) moves back and forth from the reference position in the front-rear direction. A longitudinal displacement amount calculating means (20) for calculating how much the displacement is;
The inter-axle distance (L) stored in the inter-axle distance storage means (211) and the front wheels when the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12). Vehicle inclination angle calculating means (22) for calculating the front and rear inclination angle (θ) of the vehicle to be weighed (5) from the height (H) of the platform (12);
Front wheel axle weight calculating means (23A) and rear wheel axle weight calculating means for calculating the front wheel axle weight and the rear wheel axle weight at the current position based on the detected values (Wa to Wd) from the load cells (13A to 13D). (23B)
From the front wheel axle weight and rear wheel axle weight calculated by the front wheel axle weight calculating means (23A) and the rear wheel axle weight calculating means (23B), respectively, and the longitudinal displacement calculated by the longitudinal displacement calculating means (20). Front-rear center-of-gravity position calculating means (24) for calculating at which position in the vehicle front-rear direction the vehicle center-of-gravity position (G or G ′) is;
Storage for storing front / rear center-of-gravity position information calculated by the front / rear center-of-gravity position calculation means (24) in a state where all the wheels of the vehicle to be weighed (5) are placed on the flat surface (11) of the weighing platform (10). Means (32);
Front / rear center of gravity position information newly calculated by the front / rear center of gravity position calculating means (24) in a state where the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12) and the memory A longitudinal centroid displacement amount calculating means (25) for comparing the longitudinal centroid position information on the flat surface (11) stored in the means (32) and calculating the longitudinal centroid displacement amount (T);
The vehicle to be weighed (5) based on the front / rear center-of-gravity displacement amount (T) calculated by the front / rear center-of-gravity displacement amount calculation means (25) and the vehicle inclination angle (θ) calculated by the vehicle inclination angle calculation means (22). Vehicle gravity center height position calculating means (26) for calculating the gravity center height position (G1) of
Each with
An apparatus for measuring the center of gravity of a vehicle to be weighed on a truck scale. Detection from each load cell (13A to 13D) when load cells (13A to 13D) are provided on the lower surfaces near the four corners of the weighing table (10) and the vehicle to be weighed (5) is placed on the weighing table (10). In a truck scale in which the weight of the vehicle to be weighed (5) can be measured by the arithmetic processing unit (3) based on the value,
The weighing platform (10) includes a flat surface (11) having an area where all the wheels (51A to 51D) of the vehicle to be weighed (5) can be placed simultaneously, and the flat surface (11) at a position in front of the flat surface (11). While using the one provided with the front wheel mount (12) raised by a predetermined height,
A wheel position detector (8) capable of detecting the front wheel position and the rear wheel position of the vehicle to be weighed (5) placed on the weighing platform (10);
Front wheel axle weight storage means (231A) for storing the front wheel axle weight and the rear wheel axle weight when the front wheel axle weight and the rear wheel axle weight of the vehicle to be weighed (5) are measured by a separate axle weight meter. ) And rear wheel axle load storage means (231B),
The arithmetic processing unit (3)
Based on the wheel position information from the wheel position detector (8) when the vehicle to be weighed (5) is placed on the weighing platform (10), the vehicle to be weighed (5) moves back and forth from the reference position in the front-rear direction. A longitudinal displacement amount calculating means (20) for calculating how much the displacement is;
An inter-axle distance calculating means (21) for calculating a distance (L) between the front and rear axles from the front wheel position and the rear wheel position detected by the wheel position detector (8);
When the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12), the inter-axle distance (L) calculated by the inter-axle distance calculating means (21) and the front wheel mounting Vehicle inclination angle calculation means (22) for calculating the front and rear inclination angle (θ) of the vehicle to be weighed (5) from the height (H) of the platform (12);
The front wheel axle weight stored in the front wheel axle weight storage means (231A), the rear wheel axle weight stored in the rear wheel axle weight storage means (231B), and the front and rear calculated by the longitudinal displacement amount calculating means (20). Front-rear center-of-gravity position calculation means (24) for calculating in the vehicle front-rear direction the vehicle center-of-gravity position (G or G ′) from the displacement amount;
Storage for storing front / rear center-of-gravity position information calculated by the front / rear center-of-gravity position calculation means (24) in a state where all the wheels of the vehicle to be weighed (5) are placed on the flat surface (11) of the weighing platform (10). Means (32);
Front / rear center of gravity position information newly calculated by the front / rear center of gravity position calculating means (24) in a state where the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12) and the memory A longitudinal centroid displacement amount calculating means (25) for comparing the longitudinal centroid position information on the flat surface (11) stored in the means (32) and calculating the longitudinal centroid displacement amount (T);
The vehicle to be weighed (5) based on the front / rear center-of-gravity displacement amount (T) calculated by the front / rear center-of-gravity displacement amount calculation means (25) and the vehicle inclination angle (θ) calculated by the vehicle inclination angle calculation means (22). Vehicle gravity center height position calculating means (26) for calculating the gravity center height position (G1) of
Each with
An apparatus for measuring the center of gravity of a vehicle to be weighed on a truck scale. Detection from each load cell (13A to 13D) when load cells (13A to 13D) are provided on the lower surfaces near the four corners of the weighing table (10) and the vehicle to be weighed (5) is placed on the weighing table (10). In a truck scale in which the weight of the vehicle to be weighed (5) can be measured by the arithmetic processing unit (3) based on the value,
The weighing platform (10) includes a flat surface (11) having an area where all the wheels (51A to 51D) of the vehicle to be weighed (5) can be placed simultaneously, and the flat surface (11) at a position in front of the flat surface (11). While using the one provided with the front wheel mount (12) raised by a predetermined height,
A wheel position detector (8) capable of detecting the front wheel position and the rear wheel position of the vehicle to be weighed (5) placed on the weighing platform (10);
Axle distance storage means (211) for storing the distance (L) between the axles of the to-be-measured vehicle (5) when the distance (L) between the front and rear axles of the to-be-measured vehicle (5) is known in advance. )
Further, front wheel axle weight storage means for storing the front wheel axle weight and the rear wheel axle weight when the front wheel axle weight and the rear wheel axle weight of the vehicle to be weighed (5) are measured with a separate axle weight meter ( 231A) and rear wheel axle load storage means (231B),
The arithmetic processing unit (3)
Based on the wheel position information from the wheel position detector (8) when the vehicle to be weighed (5) is placed on the weighing platform (10), the vehicle to be weighed (5) moves back and forth from the reference position in the front-rear direction. A longitudinal displacement amount calculating means (20) for calculating how much the displacement is;
The inter-axle distance (L) stored in the inter-axle distance storage means (211) and the front wheels when the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12). Vehicle inclination angle calculating means (22) for calculating the front and rear inclination angle (θ) of the vehicle to be weighed (5) from the height (H) of the platform (12);
The front wheel axle weight stored in the front wheel axle weight storage means (231A), the rear wheel axle weight stored in the rear wheel axle weight storage means (231B), and the front and rear calculated by the longitudinal displacement amount calculating means (20). Front-rear center-of-gravity position calculation means (24) for calculating in the vehicle front-rear direction the vehicle center-of-gravity position (G or G ′) from the displacement amount;
Storage for storing front / rear center-of-gravity position information calculated by the front / rear center-of-gravity position calculation means (24) in a state where all the wheels of the vehicle to be weighed (5) are placed on the flat surface (11) of the weighing platform (10). Means (32);
Front / rear center of gravity position information newly calculated by the front / rear center of gravity position calculating means (24) in a state where the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12) and the memory A longitudinal centroid displacement amount calculating means (25) for comparing the longitudinal centroid position information on the flat surface (11) stored in the means (32) and calculating the longitudinal centroid displacement amount (T);
The vehicle to be weighed (5) based on the front / rear center-of-gravity displacement amount (T) calculated by the front / rear center-of-gravity displacement amount calculation means (25) and the vehicle inclination angle (θ) calculated by the vehicle inclination angle calculation means (22). Vehicle gravity center height position calculating means (26) for calculating the gravity center height position (G1) of
Each with
An apparatus for measuring the center of gravity of a vehicle to be weighed on a truck scale. Detection from each load cell (13A to 13D) when load cells (13A to 13D) are provided on the lower surfaces near the four corners of the weighing table (10) and the vehicle to be weighed (5) is placed on the weighing table (10). In a truck scale in which the weight of the vehicle to be weighed (5) can be measured by the arithmetic processing unit (3) based on the value,
The weighing platform (10) includes a flat surface (11) having an area where all the wheels (51A to 51D) of the vehicle to be weighed (5) can be placed simultaneously, and the flat surface (11) at a position in front of the flat surface (11). While using the one provided with the front wheel mount (12) raised by a predetermined height,
A wheel position detector (8) capable of detecting the front wheel position and the rear wheel position of the vehicle to be weighed (5) placed on the weighing platform (10);
When weighing a vehicle to be weighed (5) having a constant distance (L) between the front and rear axles, the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel platform (12). The inclination angle (θ) of the to-be-measured vehicle (5) determined from the distance (L) between the axles of the to-be-measured vehicle (5) in the state and the height (H) of the front wheel mount (12) The vehicle inclination angle storage means (221) for storing is provided,
The arithmetic processing unit (3)
Based on the wheel position information from the wheel position detector (8) when the vehicle to be weighed (5) is placed on the weighing platform (10), the vehicle to be weighed (5) moves back and forth from the reference position in the front-rear direction. A longitudinal displacement amount calculating means (20) for calculating how much the displacement is;
Front wheel axle weight calculating means (23A) and rear wheel axle weight calculating means for calculating the front wheel axle weight and the rear wheel axle weight at the current position based on the detected values (Wa to Wd) from the load cells (13A to 13D). (23B)
From the front wheel axle weight and rear wheel axle weight calculated by the front wheel axle weight calculating means (23A) and the rear wheel axle weight calculating means (23B), respectively, and the longitudinal displacement calculated by the longitudinal displacement calculating means (20). Front-rear center-of-gravity position calculating means (24) for calculating at which position in the vehicle front-rear direction the vehicle center-of-gravity position (G or G ′) is;
Storage for storing front / rear center-of-gravity position information calculated by the front / rear center-of-gravity position calculation means (24) in a state where all the wheels of the vehicle to be weighed (5) are placed on the flat surface (11) of the weighing platform (10). Means (32);
Front / rear center of gravity position information newly calculated by the front / rear center of gravity position calculating means (24) in a state where the front wheels (51A, 51B) of the vehicle to be weighed (5) are placed on the front wheel mount (12) and the memory A longitudinal centroid displacement amount calculating means (25) for comparing the longitudinal centroid position information on the flat surface (11) stored in the means (32) and calculating the longitudinal centroid displacement amount (T);
Based on the longitudinal center of gravity displacement amount (T) calculated by the longitudinal centroid displacement amount calculating means (25) and the vehicle inclination angle (θ) stored in the vehicle inclination angle storage means (221), 5) center of gravity height position calculating means (26) for calculating the center of gravity height position (G1);
Each with
An apparatus for measuring the center of gravity of a vehicle to be weighed on a truck scale. In any one of Claim 1 to 5,
The horizontal vertical distance (M) from the wheel position detector (8) with respect to the center extension line (P) between the two load cells (13A and 13B, 13C and 13D) located on the left and right and the weighing vehicle (5) Information on the distance between the left and right wheels (51A and 51B, 51C and 51D) is stored in the storage means (31), respectively.
In the arithmetic processing unit (3),
The center extension line (Q) between the left and right wheels is based on the wheel position information from the wheel position detector (8) when the vehicle to be weighed (5) is placed on the weighing platform (10). A left-right displacement amount calculating means (27) for calculating how much it is displaced left and right with respect to the central extension line (P) between;
Wheel groups on the left and right sides of the vehicle to be weighed (5) based on the detection values (Wa to Wd) from the load cells (13A to 13D) when the vehicle to be weighed (5) is placed on the weighing platform (10). Left wheel group wheel weight calculating means (28A) and right wheel group wheel weight calculating means (28B) for calculating the total wheel weight (LW, RW) of (51A and 51C, 51B and 51D),
Calculated by the left and right total wheel weights (LW, RW) calculated by the left wheel group wheel weight calculating means (28A) and the right wheel group wheel weight calculating means (28B) and the left / right displacement amount calculating means (27). Left and right center-of-gravity position calculating means (29) for calculating the position in the left-right direction of the vehicle from the left-right displacement amount (S),
Each with
An apparatus for measuring the center of gravity of a vehicle to be weighed on a truck scale.

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