Calibration method, calibration system, and calibration support device

Abstract

To provide a calibration method, a calibration system, and a calibration support device capable of simplifying calibration of a vehicle-mounted load detection device (so-called dead weight meter).SOLUTION: The method for calibrating an automatic load meter includes a first step of applying a predetermined load to vehicle 1 by lifting up vehicle 1 with axle 2 supported at two points, a second step of measuring the predetermined load applied to vehicle 1 in the first step, a third step of obtaining a weight signal output from sensor 11 in the first step, a fourth step of generating calibration information for calibrating automatic load meter 20 based on the predetermined load measured in the second step and the weight signal obtained in the third step, and a fifth step of calibrating automatic load meter 20 based on the calibration information generated in the fourth step.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a calibration method, a calibration system, and a calibration support device. [Background technology]

[0002] Generally, when a vehicle used to transport goods is operated with a load exceeding the permitted weight (i.e., overloaded), it not only leads to traffic accidents such as rollovers and poor braking performance, but also contributes to the deterioration of the vehicle and damage to the road surface. For this reason, the load weight on the loading platform is legally limited and mandated by vehicle operation regulations.

[0003] Traditionally, the load weight of a cargo vehicle has been measured by placing the vehicle on a platform scale known as a kankan (weight scale). However, this method requires high equipment costs and a large installation space. For this reason, in recent years, load weight measurement devices (so-called weight scales) that are mounted on the vehicle itself to measure the load weight have been developed. This type of weight scale has weight measurement sensors, such as strain gauge sensors, attached to both the left and right ends of the front and rear axles, and measures the load weight by summing the outputs of these sensors, which are proportional to the loads acting on each of the front, rear, and left tires. Such on-board weight scales require regular inspection and calibration to maintain accuracy.

[0004] Patent Document 1 discloses a weight meter that is mounted on a vehicle and measures the load weight based on weight data from a sensor that changes depending on the amount of strain on the axle when a load is placed on the vehicle. In the weight meter of Patent Document 1, during calibration, the vehicle is placed on a mat scale that measures the vehicle weight, and the vehicle is jacked up with a jack to reduce the vehicle weight on the mat scale to a desired reduction amount, and the weight data output from the sensor when the desired reduction amount is reached is compared with reference weight data to display calibration information, and the weight meter is calibrated based on the calibration information. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-198176 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the calibration method disclosed in Patent Document 1 requires the placement of a mat scale when performing calibration, which requires a large installation space. Furthermore, the vehicle must be jacked up while measuring the amount of vehicle weight loss on the mat scale, which places a burden on the worker and takes a long time to complete the work.

[0007] Furthermore, in the calibration method disclosed in Patent Document 1, the vehicle is jacked up by supporting it at one point at the center of the axle, so the moment applied to the sensor changes depending on the sensor's installation position. In particular, the closer the sensor is installed to the center of the axle, the more different the distortion will be from that during normal loading and unloading, making it impossible to obtain accurate calibration results.

[0008] The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to provide a calibration method, a calibration system, and a calibration support device that can simplify the calibration of a vehicle-mounted load detection device (so-called weight meter). [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, a calibration method according to the present invention comprises: A calibration method for calibrating a weight meter that measures the load weight of a vehicle based on a weight signal output from a sensor in response to a strain amount of an axle caused by a load applied to the vehicle being transmitted to the axle, comprising: a first step of lifting up the vehicle while supporting the axle at two points and applying a predetermined load to the vehicle; a second step of measuring the predetermined load applied to the vehicle in the first step; a third step of acquiring the weight signal output by the sensor in the first step; a fourth step of generating calibration information for calibrating the weight meter based on the predetermined load measured in the second step and the weight signal acquired in the third step; and a fifth step of calibrating the weight meter based on the calibration information generated in the fourth step. It is a calibration method.

[0010] In order to achieve the above-mentioned object, a calibration system according to the present invention comprises: A calibration system for calibrating a weight meter that measures the load weight of a vehicle based on a weight signal output from a sensor in response to an amount of strain on an axle caused by a load applied to the vehicle being transmitted to the axle, a calibration support device that lifts up the vehicle while supporting the axle at two points, applies a predetermined load to the vehicle, and measures the predetermined load applied to the vehicle; a control means for acquiring the weight signal output by the sensor when the predetermined load is applied to the vehicle by the calibration assistance device, the control means generates calibration information for calibrating the weight meter based on the predetermined load measured by the calibration support device and the acquired weight signal. It is a calibration system.

[0011] In order to achieve the above-mentioned object, a calibration support device according to the present invention comprises: A calibration support device for supporting the calibration of a weight meter that measures the load weight of a vehicle based on a weight signal output from a sensor in response to an amount of strain on an axle caused by a load applied to the vehicle being transmitted to the axle, a lift unit that lifts up the vehicle while supporting the axle at two points, and applies a predetermined load to the vehicle; a load meter that measures the predetermined load applied to the vehicle by the lift unit, It is a calibration support device. [Effects of the Invention]

[0012] The inventors discovered that by lifting up a vehicle with the axles supported at two points and applying a predetermined load to the vehicle, the distortion of the axles at this time is approximately the same as the distortion when the vehicle is normally loaded. Therefore, calibration information for the weight meter can be obtained based on the predetermined load applied to the vehicle and the weight signal output by the sensor when the predetermined load is applied to the vehicle. As a result, the present invention makes it possible to simplify the calibration of vehicle-mounted load detection devices (so-called weight meters).

[0013] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a calibration system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram showing how the calibration support device lifts up the vehicle. [Figure 3] FIG. 3 is a diagram illustrating an example of the configuration of the sensor unit. [Figure 4] FIG. 4 is a diagram showing an example of the configuration of a weight meter. [Figure 5] FIG. 5 is a diagram illustrating an example of the configuration of a calibration support device. [Figure 6] FIG. 6 is a flowchart showing an example of a method for calibrating a weight meter. [Figure 7] FIG. 7 is a diagram for explaining the advantage of two-point support. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, a calibration method, a calibration system, and a calibration support device for a vehicle load weight measuring device (so-called weight meter) according to one embodiment of the present invention will be described with reference to the drawings.

[0016] The present invention is not limited to the embodiments described below, and can be appropriately modified, improved, etc. In addition, the material, shape, size, number, location, etc. of each component in the embodiments described below are arbitrary and not limited as long as they can achieve the present invention.

[0017] <Calibration System 100> First, an example of a calibration system 100 will be described. As shown in Fig. 1, the calibration system 100 is configured to include a plurality of sensor units 10 provided near both left and right tires 3, 3 on both front and rear axles 2 of a vehicle 1, a weight meter 20 mounted on the vehicle 1 to measure and display the loaded weight of the vehicle 1 based on weight signals from the plurality of sensor units 10 (and a correction value, which will be described later), and a calibration support device 30 that supports the calibration of the weight meter 20.

[0018] In this example, the vehicle is assumed to have four wheels, so the calibration system 100 is made up of four sensor units 10, but if the vehicle has six wheels, the optimal form can be adopted, such as six sensor units 10.

[0019] As shown in Fig. 2, springs 4 (e.g., leaf springs, etc.) are interposed between the left and right ends of both front and rear axles 2 of the vehicle 1 and the front, rear, left and right locations of the vehicle frame (e.g., bed frame), and each of the sensor units 10 provided on the front and rear axles 2 outputs a weight signal corresponding to the amount of strain of the axles 2 that occurs when a load applied to the vehicle 1 is transmitted to the axles 2 via the springs 4. Note that the calibration system 100 according to this embodiment can obtain correct calibration results whether the sensor unit 10 is provided inside or outside the pair of springs 4 in the left-right direction (this will be described later).

[0020] [Sensor unit 10] 3, the sensor unit 10 is configured to include a sensor 11, an adjustment unit 12, a voltage / frequency conversion unit 13 (hereinafter also referred to as "V / F conversion unit 13"), a weight meter connector 14, and a setting connector 15. In the sensor unit 10, an ASIC is used for the adjustment unit 12.

[0021] The sensor 11 is a strain-type sensor that outputs a weight signal corresponding to the amount of strain on the axle 2. The adjustment unit 12 has the function of amplifying and correcting the weight signal output by the sensor 11. The adjustment unit 12 is configured, for example, with an A / D conversion unit that converts the weight signal input from the sensor 11 into a digital weight signal, a correction unit that corrects the digital weight signal, an amplification unit that amplifies the digital weight signal, and a D / A conversion unit that converts the digital weight signal into an analog weight signal. In this example, the adjustment unit 12 is implemented using an ASIC, but the present invention is not limited to this and various other embodiments such as a DSP or a CPU can be used.

[0022] The V / F conversion unit 13 has a function of converting the weight signal (voltage) adjusted by the adjustment unit 12 into a frequency. The weight meter connector 14 is connected to the weight meter 20 and has a function of transmitting the weight signal converted into a frequency by the V / F conversion unit 13 to the weight meter 20. The setting connector 15 enables connection to a setting device (not shown) and is connected to the setting device when setting the sensor unit 10.

[0023] [Weight scale 20] As shown in FIG. 4, the weight meter 20 includes a control unit 21, a display unit 22, an input unit 23, a communication unit 24, and a storage unit 25.

[0024] The control unit 21 has a function of measuring the load weight of the vehicle 1 based on the weight signals and correction values ​​from each sensor unit 10. The display unit 22 has a function of displaying the load weight of the vehicle 1 measured by the control unit 21. The input unit 23 has a measurement start button (not shown) and a measurement end button (not shown), etc., and can perform input related to the operation and operation control of the weight meter 20. The communication unit 24 is realized by, for example, an NIC, and is connected to a network via a wired or wireless connection, so that information can be sent and received between the calibration support device 30, etc. via the network. The memory unit 25 stores correction values, etc. for the weight signals used when the control unit 21 measures the load weight.

[0025] [Calibration support device 30] As shown in FIG. 5, the calibration support device 30 includes a lift mechanism 31 and a control mechanism 32.

[0026] The lift mechanism 31 is configured to include a lift unit 33 and a load sensor 34. The lift unit 33 has a function of lifting up the vehicle 1 with the axle 2 supported at two points. The load sensor 34 can detect a predetermined load applied to the vehicle 1 by the lift unit 33 via the axle 2. The lift mechanism 31 in this example is not particularly limited, but can be configured by using, for example, an existing lift as the lift unit 33 and attaching the load sensor 34 to it. Note that the lift mechanism 31 may include a load meter (not shown) instead of the load sensor 34. In this case, the load meter can measure the predetermined load applied to the vehicle 1 by the lift unit 33 via the axle 2.

[0027] The control mechanism 32 is configured to include a control unit 35, a display unit 36, an input unit 37, a communication unit 38, and a storage unit 39. The control unit 35 has a function of controlling the operation of the lift mechanism 31. In this example, the control unit 35 also has a function of measuring a predetermined load applied to the vehicle 1 based on a load signal from the load sensor 34. In addition, in this example, the control unit 35 has a function of executing a calibration support program, which will be described later.

[0028] The display unit 36 ​​has a function of displaying various information including the predetermined load measured by the control unit 35. The input unit 37 can input information related to the operation and operation control of the lift mechanism 31. The communication unit 38 is realized by, for example, an NIC or the like, and is connected to a network by wire or wirelessly, so that information can be sent and received between the weight meter 20 and the like via the network. The memory unit 39 stores a calibration support program executed by the control unit 35.

[0029] Here, the calibration assistance program is, for example, a program that assists in the calibration of a weight meter 20 that measures the load weight of the vehicle 1 based on weight data output by the sensor unit 10 in response to the amount of strain on the axle 2 caused by the weight applied to the vehicle 1 being transmitted to the axle 2.

[0030] <Calibration method> Next, an example of a calibration method will be described with reference to Fig. 6. This calibration method is realized by executing a calibration assistance program. Note that this calibration method is performed when no cargo is loaded on the vehicle 1.

[0031] In the following description, the calibration assistance program is executed by the control unit 35 of the calibration assistance device 30 (i.e., the control unit 35 corresponds to the "control means" of the present invention), but it may also be executed by, for example, the control unit 21 of the weight scale 20. In this case, the calibration assistance program is stored in the memory unit 25 of the weight scale 20. The calibration assistance program may also be executed by a server (not shown). In this case, the calibration system 100 is configured further to include the server, and the server is connected to the weight scale 20 and the calibration assistance device 30 via a network.

[0032] After the vehicle 1 equipped with the weight meter 20 to be inspected is moved and stopped in line with the lift unit 33, the weight meter 20 and the calibration support device 30 are connected via the communication units 24, 38 in response to detection of the stop of the vehicle 1 or a predetermined operation. The control unit 35 then determines whether or not measurement start information has been detected (Sp1). If the measurement start information has been detected (Yes in Sp1), the control unit 35 proceeds to Sp2. On the other hand, if the measurement start information has not been detected (No in Sp1), the control unit 35 repeats Sp1. The measurement start information may be detected (received) by being sent from the weight meter 20 to the calibration support device 30 in response to an input operation to the input unit 23 of the weight meter 20 (for example, pressing the measurement start button), or may be acquired by an input operation to the input unit 37 of the calibration support device 30.

[0033] The control unit 35 commands the lift mechanism 31 to lift up the vehicle 1 (Sp2). Then, the lift unit 33 of the lift mechanism 31 lifts up the vehicle 1 with the axle 2 supported at two points. Note that this lift-up is intended to apply a predetermined load to the vehicle 1, so the vehicle 1 does not have to be lifted up completely. This causes the vehicle 1 to be virtually placed in a loaded state.

[0034] Meanwhile, the lift unit 33 is commanded to lift up the vehicle 1 at Sp2 and applies a predetermined load to the vehicle 1, and at this time, the support position of the axle 2 by the lift unit 33 is changed depending on the mounting position of the sensor unit 10 relative to the spring 4.

[0035] More specifically, when each sensor unit 10 is positioned outside the pair of springs 4 in the left-right direction, the support position is inside the pair of springs 4 in the left-right direction, and when each sensor unit 10 is positioned inside the pair of springs 4 in the left-right direction, the support position is near the pair of springs 4 in the left-right direction. As a result, the strain of the axle 2 during lift-up becomes approximately the same as the strain of the axle 2 during normal loading. Furthermore, since a predetermined load is applied to the vehicle 1, each sensor unit 10 outputs a weight signal corresponding to the amount of strain of the axle 2. Note that the vicinity of the spring 4 is preferably directly below the spring 4 (in this example, this corresponds to the vicinity of 0.5 and 1.5 on the horizontal axis in FIG. 7), and by lifting up the vehicle 1 using this position as the support position, the strain of the axle 2 becomes approximately the same as that during normal loading (target value), as will be described later. That is, the vicinity of the spring 4 may be any position where the strain on the axle 2 when the vehicle 1 is lifted up in a two-point support state is approximately the same as that when the vehicle is normally loaded (target value).

[0036] The control unit 35 measures the predetermined load applied to the vehicle 1 based on the load signal from the load sensor 34 of the lift mechanism 31 (Sp3). Note that the control unit 35 may control the load related to lift-up in Sp2, but since many existing lifts (equivalent to the lift unit 33) do not have the function of controlling the load related to lift-up, considering the utilization of existing lifts, it is preferable to configure the system to measure the predetermined load in Sp3. Also, if the lift mechanism 31 has a load meter instead of the load sensor 34, the control unit 35 will acquire predetermined load information from the load meter in this step.

[0037] The control unit 35 acquires the weight signals output from each sensor unit 10 at Sp2 via the weight meter 20 (Sp4). Note that the control unit 35 does not care whether the processing procedures at Sp3 and Sp4 are performed before or after Sp4.

[0038] The control unit 35 determines whether or not measurement end information has been detected (Sp5). If measurement end information has been detected (Yes in Sp5), the processing of the control unit 35 proceeds to Sp6. On the other hand, if measurement end information has not been detected (No in Sp5), the processing of the control unit 35 repeats Sp5. Note that the detection of measurement end information is not particularly limited, similar to the detection of measurement start information in Sp1.

[0039] The control unit 35 calculates a correction value based on the predetermined load measured in Sp3 and the weight signal acquired in Sp4 (Sp6). This correction value is the difference between the predetermined load measured in Sp3 and the weight signal acquired in Sp4, and the correction value is obtained by calculating this difference. Note that the correction value is used when the control unit 21 of the weight meter 20 measures the loaded weight, as described above, and corresponds to the "calibration information" of the present invention.

[0040] The control unit 35 commands the weight meter 20 to store the correction value calculated in Sp6 (Sp7). As described above, the weight meter 20 measures the load weight of the vehicle 1 based on the weight signals and correction values ​​from each sensor unit 10. That is, the correction value calculated as calibration information is stored in the memory unit 25 of the weight meter 20, thereby completing the calibration of the weight meter 20.

[0041] <Advantages of two-point support> Next, the advantages of lifting up the vehicle 1 with the axle 2 supported at two points will be described with reference to Fig. 7. From Fig. 7, it can be seen that when each sensor unit 10 is positioned outside the pair of springs 4 in the left-right direction, the strain on the axle 2 when lifting up the vehicle 1 is approximately the same as when it is normally loaded (target value), regardless of whether it is supported at one point or two points.

[0042] On the other hand, when each sensor unit 10 is located inside a pair of springs 4 in the left-right direction, it can be confirmed that the strain on the axle 2 when the vehicle 1 is lifted (jacked up) in a single-point support state is significantly different from that when the vehicle is normally loaded (target value). In other words, in this case, a correct calibration result cannot be obtained.

[0043] On the other hand, in the above case, if the vehicle 1 is lifted up in a two-point support state, it can be confirmed that the strain of the axle 2 is approximately the same as when the vehicle is normally loaded (target value). In other words, by lifting up the vehicle 1 in a two-point support state, correct calibration results can be obtained regardless of whether each sensor unit 10 is provided inside or outside the pair of springs 4 in the left-right direction.

[0044] <Actions and Effects> As described above, according to this embodiment, by lifting up the vehicle 1 with the axle 2 supported at two points and applying a predetermined load, the distortion of the axle 2 at this time is approximately the same as the distortion when the vehicle is normally loaded, and therefore calibration information for the weight meter 20 can be obtained based on the predetermined load applied to the vehicle 1 and the weight signal output by the sensor 11 when the predetermined load is applied to the vehicle 1. Therefore, there is no need to use a mat scale or the like as in the conventional case, and furthermore, calibration information can be obtained by lifting up the vehicle once. In this way, according to this embodiment, calibration of the weight meter can be simplified.

[0045] Furthermore, according to this embodiment, by changing the support position of the axle 2 by the lift unit 33 in accordance with the position of the sensor 11 (sensor unit 10) relative to the spring 4, the distortion of the axle 2 when lifted up becomes substantially the same as the distortion of the axle 2 when normally loaded. In other words, correct calibration results can be obtained when calibrating the weight meter 20.

[0046] Here, the features of the embodiments of the calibration method, calibration system, and calibration support device according to the present invention described above will be briefly summarized and listed below in [1] to [4].

[0047] [1] A calibration method for calibrating a weight meter (20) that measures the load weight of a vehicle (1) based on a weight signal output from a sensor (11) in response to a strain amount of an axle (2) caused by a load applied to the vehicle (1) being transmitted to the axle (2), comprising: a first step of lifting up the vehicle (1) while supporting the axle (2) at two points, and applying a predetermined load to the vehicle (1); a second step of measuring the predetermined load applied to the vehicle (1) in the first step; a third step of acquiring the weight signal output by the sensor (11) in the first step; a fourth step of generating calibration information (in this example, a correction value) for calibrating the weight meter (20) based on the predetermined load measured in the second step and the weight signal acquired in the third step; and a fifth step of calibrating the weight meter (20) based on the calibration information (in this example, the correction value) generated in the fourth step. Calibration method.

[0048] [2] The calibration method according to [1] above, In the first step, when the sensors (11) arranged in a pair in the left-right direction of the vehicle (1) are arranged inside springs (4) interposed between both left and right ends of the axle (2) and front, rear, left and right locations of the vehicle frame, the axle (2) is supported at two points near the springs (4), and when the pair of sensors (11) are arranged outside the springs (4), the axle (2) is supported at two points inside the springs (4). Calibration method.

[0049] [3] A calibration system (100) for calibrating a weight meter (20) that measures the load weight of a vehicle (1) based on a weight signal output from a sensor (11) in response to a strain amount of an axle (2) caused by a load applied to the vehicle (1) being transmitted to the axle, the calibration system comprising: a calibration support device (30) that lifts up the vehicle (1) while supporting the axle (2) at two points, applies a predetermined load to the vehicle (1), and measures the predetermined load applied to the vehicle (1); a control means (in this example, a control unit 35) that acquires the weight signal output by the sensor (11) when the predetermined load is applied to the vehicle (1) by the calibration assistance device (30), The control means generates calibration information for calibrating the weight meter (20) based on the predetermined load measured by the calibration support device (30) and the acquired weight signal. Calibration system (100).

[0050] [4] A calibration support device (30) for calibrating a weight meter (20) that measures the load weight of a vehicle (1) based on a weight signal output from a sensor (11) in response to a strain amount of an axle (2) caused by a load applied to the vehicle (1) being transmitted to the axle, the calibration support device (30) comprising: a lift unit (33) that lifts up the vehicle (1) while supporting the axle (2) at two points, and applies a predetermined load to the vehicle (1); a load meter (in this example, a load sensor 34 and a part of a function of a control unit 35) that measures the predetermined load applied to the vehicle (1) by the lift unit (33), Calibration support device (30).

[0051] The inventors discovered that by lifting up a vehicle with the axles supported at two points and applying a predetermined load to the vehicle, the distortion of the axles at this time is approximately the same as the distortion when the vehicle is normally loaded. As a result, calibration information for the weight meter can be obtained based on the predetermined load applied to the vehicle and the weight signal output by the sensor when the predetermined load is applied to the vehicle. Therefore, there is no need to use a mat scale or the like as in the past, and calibration information can be obtained with just one lift-up. In this way, the configurations [1] to [4] above can simplify the calibration of the weight meter.

[0052] Furthermore, with the configuration of [2] above, by changing the support position of the axle in accordance with the position of the sensor relative to the spring, the distortion of the axle during lift-up becomes approximately the same as the distortion of the axle during normal loading. In other words, accurate calibration results can be obtained when calibrating the weight meter. [Explanation of symbols]

[0053] 1 vehicle 2 axles 3 Tires 4 Spring 10 Sensor Unit 11 Sensors 20 Weight scale 30 Calibration support equipment 31 Lift mechanism 32 Control Mechanism 33 Lift section 34 Load sensor 35 Control Unit 36 Display section 37 Input section 38 Communications Department 39 Memory section 100 Calibration System

Claims

1. A calibration method for calibrating a weight meter that measures the load weight of a vehicle based on a weight signal output from a sensor in response to a strain amount of an axle caused by a load applied to the vehicle being transmitted to the axle, comprising: a first step of lifting up the vehicle while supporting the axle at two points and applying a predetermined load to the vehicle; a second step of measuring the predetermined load applied to the vehicle in the first step; a third step of acquiring the weight signal output by the sensor in the first step; a fourth step of generating calibration information for calibrating the weight meter based on the predetermined load measured in the second step and the weight signal acquired in the third step; and a fifth step of calibrating the weight meter based on the calibration information generated in the fourth step. Calibration method.

2. 2. The calibration method according to claim 1, In the first step, when the sensors arranged in pairs in the left-right direction of the vehicle are arranged inside springs interposed between both left and right ends of the axle and front, rear, left and right locations of the vehicle frame, the axle is supported at two points near the springs, and when the pair of sensors are arranged outside the springs, the axle is supported at two points inside the springs. Calibration method.

3. A calibration system for calibrating a weight meter that measures the load weight of a vehicle based on a weight signal output from a sensor in response to an amount of strain on an axle caused by a load applied to the vehicle being transmitted to the axle, a calibration support device that lifts up the vehicle while supporting the axle at two points, applies a predetermined load to the vehicle, and measures the predetermined load applied to the vehicle; a control means for acquiring the weight signal output by the sensor when the predetermined load is applied to the vehicle by the calibration assistance device, the control means generates calibration information for calibrating the weight meter based on the predetermined load measured by the calibration support device and the acquired weight signal. Calibration system.

4. A calibration assistance device for assisting in the calibration of a weight meter that measures the load weight of a vehicle based on a weight signal output from a sensor in response to an amount of strain on an axle caused by a load applied to the vehicle being transmitted to the axle, a lift unit that lifts up the vehicle while supporting the axle at two points, and applies a predetermined load to the vehicle; a load meter that measures the predetermined load applied to the vehicle by the lift unit, Calibration support device.

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