CN115420361A - Vehicle-mounted dynamic calibration method of dynamic truck scale - Google Patents

Abstract

The present invention provides a vehicle-mounted dynamic calibration method for a dynamic truck scale, comprising the following steps: S10, preparation stage: driving the vehicle-mounted dynamic calibration system to the position of the dynamic truck scale; S20, setting parameters: the parameters include dynamic force source loading The loading force value F of the device, the loading pulse time t and the interval time T are input to the control device; S30, loading test: the control device controls the dynamic force source loading device according to the parameters, so that the pressure-bearing base plate is balanced against the scale of the dynamic truck scale. The platform exerts a downward force; S40, calibration test: the dynamic truck scale outputs the detected weight m, and the force sensor outputs the reference weight M accordingly, and compares the detected weight m with the reference weight M to obtain the dynamic weighing error of the dynamic truck scale; S50, Complete the calibration of the dynamic truck scale. The invention has the advantages of simulating the loading situation of the vehicle passing through the dynamic truck scale, the control device controls the output of the dynamic force source loading device, and improves the calibration efficiency of the dynamic truck scale.

Description

A vehicle-mounted dynamic calibration method for a dynamic truck scale

technical field

The invention relates to the technical field of truck scale calibration, in particular to a vehicle-mounted dynamic calibration method for a dynamic truck scale.

Background technique

A dynamic truck scale is a vehicle with a carrier and an approach, which can automatically weigh a moving vehicle and determine the total mass of the vehicle and (or) the axle load, and in some cases can also determine the axle group load of the vehicle at the same time. automatic weighing apparatus.

At present, the dynamic verification and calibration of dynamic truck scales is carried out according to the verification regulations JJG 907 "Dynamic Road Vehicle Automatic Weighing Apparatus". The reference vehicles of different axle types are used to carry out 10 tests within the specified speed range, and the following requirements are followed: 6 passes through the center of the carrier (weighing platform); 2 times through the left side near the carrier (weighing platform); 2 times through the right side near the carrier (weighing platform). By properly loading or unloading the reference vehicle, the total mass of the reference vehicle and the axle load (if necessary) shall cover the weighing range of the dynamic truck scale as much as possible. Min and commonly used scales for dynamic tests.

There are many problems in this verification method: (1) The mass of the reference vehicle cannot cover the weighing range of the dynamic truck scale, and even cannot reach the minimum and maximum weighing capacity of the dynamic truck scale; (2) The calibration efficiency is low, and dynamic calibration requires at least 4 kinds of For axle-type vehicles, each axle-type test is performed 10 times, with a large workload and low efficiency; (3) poor safety, dynamic calibration needs to be tested on the actual road, and the maximum speed is 80km/h. , easy to cause safety accidents; (4) The accuracy of the calibration is low. Since the vehicle is controlled by humans, the consistency of the speed, acceleration and loading position during the two driving processes cannot be guaranteed, so the repeatability and accuracy of the calibration process cannot be guaranteed. Reproducibility. (5) The inaccuracy of the calibration process of the dynamic truck scale is caused by the road surface factors during the driving process of the vehicle, vehicle vibration and other interference factors.

Contents of the invention

The technical problem to be solved by the present invention is to provide a vehicle-mounted dynamic calibration method for a dynamic truck scale to improve the calibration efficiency of the dynamic truck scale.

The present invention is achieved in this way: a vehicle-mounted dynamic calibration method of a dynamic truck scale, comprising the following steps:

S10. Preparation stage: drive the vehicle-mounted dynamic calibration system to the position of the dynamic truck scale. The vehicle-mounted dynamic calibration system includes a transport vehicle, a dynamic force source loading device, a force sensor, a pressure-bearing floor and a control device. The transport vehicle It includes the front of the car and the compartment, the front of the car is fixedly connected with the compartment, the bottom plate of the compartment is provided with a through hole, the dynamic force source loading device is fixed inside the compartment, and the output shaft of the dynamic force source loading device Slidingly connected with the through hole, the output shaft of the dynamic force source loading device is also fixedly connected with the upper side of the force sensor, the pressure-bearing bottom plate is fixedly connected with the lower side of the force sensor, and the control device It is electrically connected with the dynamic force source loading device, and the pressure-bearing bottom plate is located above the weighing platform of the dynamic truck scale;

S20. Setting parameters: the parameters include the loading force value F of the dynamic force source loading device, the loading pulse time t and the interval time T, and input the parameters to the control device;

S30. Loading test: the control device controls the dynamic force source loading device according to the parameters, so that the pressure-bearing bottom plate exerts a downward force on the weighing platform of the dynamic truck scale;

S40. Calibration test: the dynamic truck scale outputs a detected weight m, and the force sensor outputs a reference weight M accordingly, and compares the detected weight m with the reference weight M to obtain the dynamic weighing error of the dynamic truck scale ;

S50, completing the calibration of the dynamic truck scale.

Further, the parameters also include the wheelbase L of two adjacent axles of the vehicle, the driving speed v of the vehicle, the weighing platform width l of the dynamic truck scale, the loading pulse time t is equal to l/v, and the interval time T Equal to L/v.

Further, the parameters also include the axle type N of the vehicle, N≥2, the wheelbase of two adjacent axles of the vehicle is specifically L _j , 1≤j≤N-1, N and j are both positive integers, so The interval time is specifically T _j , where T _j =L _j /v.

Further, the parameters also include a minimum loading force value F _min , a maximum loading force value F _max and an incremental force value F _inc , and the loading force value F is between the minimum loading force value F _min and the maximum loading force value F _max Select from small to large.

Further, before S10, S1 is also included;

S1. Calibration of the dynamic force source loading device: first drive the vehicle-mounted dynamic calibration system to the calibration position, then press the pressure-bearing base plate close to the rigid ground, and adjust the input current value I of the dynamic force source loading device, The dynamic force source loading device outputs the loading force value F, because the loading force value F of the dynamic force source loading device is determined by the input current value I, thereby obtaining the functional relationship between the loading force value F and the input current value I F=f(I), the functional relationship F=f(I) is stored in the control device.

Further, S11 is also included after S10;

S11. Preloading test: the output shaft of the dynamic force source loading device moves toward the weighing platform of the dynamic truck scale for a distance H until the gap between the pressure-bearing base plate and the weighing platform of the dynamic truck scale is zero, The control device is initialized, and then the dynamic force source loading device applies a force value F ₀ of an appropriate size to the weighing platform of the dynamic truck scale, so as to ensure that the pressure-bearing base plate is pressed tightly against the weighing platform of the dynamic truck scale, At this time, the force sensor outputs a reference weight M ₀ , and the dynamic truck scale outputs a detected weight m ₀ , and then simultaneously resets the force sensor and the dynamic truck scale.

Further, S41 is also included after S40;

S41. Repeatability test: Repeat S30 to S40 multiple times, record the test results, and calculate the repeatability error.

Further, S42 is also included after S40;

S42. Unbalanced load test: the weighing platform of the dynamic truck scale is divided into multiple loading areas, adjust the position of the vehicle-mounted dynamic calibration system so that the pressure-bearing base plate is in different loading areas, and turn to S30; when all The loading area is all tested, go to S50.

Further, in the above S10, the vehicle-mounted dynamic calibration system further includes a supporting leg device, the supporting leg device is fixedly connected to the carriage, the control device is also electrically connected to the supporting leg device, the The supporting leg device is located above the base of the dynamic truck scale.

Further, the supporting leg device includes a supporting base plate, a vertical telescopic mechanism and a horizontal telescopic mechanism, the body of the horizontal telescopic mechanism is fixed on the outer wall of the carriage, and the telescopic rod of the horizontal telescopic mechanism is connected to the vertical telescopic mechanism. It is fixedly connected to the body of the telescopic mechanism, and the telescopic rod of the vertical telescopic mechanism is fixedly connected to the support base plate;

After the transport vehicle arrives at the position of the dynamic truck scale, the control device sequentially controls the horizontal telescopic mechanism and the vertical telescopic mechanism to move the supporting base plate from the compartment to the dynamic truck scale Above the pedestal of the vehicle scale, the support base plate is against the pedestal of the dynamic truck scale.

The advantages of the present invention are: 1. The loading situation of the simulated vehicle passing through the dynamic truck scale, the control device controls the output of the dynamic force source loading device, during the loading process of the dynamic force source loading device, the dynamic truck scale outputs the detection weight, correspondingly The force sensor outputs a reference weight, and the calibration of the dynamic truck scale is realized through data comparison; the transport vehicle is used to transport the dynamic force source loading device to the dynamic truck scale to be calibrated, and the transport vehicle also serves as a support during calibration Function, reduce manual labor intensity, improve the calibration efficiency of the dynamic truck scale. 2. By changing the input parameters, it is convenient to adjust the loading condition of the dynamic force source loading device. 3. By setting the parameters of the number of tests in the control device, repeatability tests can be performed very conveniently and efficiently. 4. According to the loading area of the dynamic truck scale, use the transport vehicle to adjust the position of the dynamic force source loading device. .

Description of drawings

The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is an execution flow chart of the vehicle-mounted dynamic calibration method of the dynamic truck scale of the present invention.

FIG. 2 is a first perspective view of the structure of the vehicle-mounted dynamic calibration system of the present invention.

Fig. 3 is a schematic perspective view 2 of the structure of the vehicle-mounted dynamic calibration system of the present invention.

Fig. 4 is a schematic plan view of the structure of the vehicle-mounted dynamic calibration system of the present invention.

Fig. 5 is a cross-sectional view of A-A in Fig. 4 .

Fig. 6 is a schematic diagram of the positions of the pressure-bearing base plate, the force sensor, the adapter and the weighing platform in the present invention.

Fig. 7 is a schematic diagram of the connection between the control device and the computer in the present invention.

Fig. 8 is a schematic diagram of a reference vehicle passing through a dynamic truck scale in the prior art.

Fig. 9 is an output waveform diagram of the loading condition of the two-axle vehicle of the dynamic truck scale in the prior art.

Fig. 10 is an output waveform diagram of a multi-axle vehicle loading condition of a dynamic truck scale in the prior art.

Fig. 11 is a schematic diagram of the loading area of the dynamic truck scale in the prior art.

Reference signs: transport vehicle 1; headstock 11; compartment 12; storage tank 121; dynamic force source loading device 2; output shaft 21; adapter 22; force sensor 3; pressure-bearing base plate 4; control device 5; keyboard 51; computer 6; display 61; supporting leg device 7; supporting base plate 71; vertical telescopic mechanism 72; horizontal telescopic mechanism 73; dynamic truck scale 8; base 81; weighing platform 82; middle 821; left 822; Front axle wheel 91; Rear axle wheel 92.

detailed description

The embodiment of the present invention provides a vehicle-mounted dynamic calibration method for a dynamic truck scale, which solves the shortcomings of using real vehicles for calibration of the dynamic truck scale in the prior art, and achieves the technical effect of improving the calibration efficiency of the dynamic truck scale.

The technical solution in the embodiment of the present invention is to solve the above-mentioned shortcomings, and the general idea is as follows: simulate the loading situation of the vehicle passing through the dynamic truck scale, manufacture the vehicle-mounted dynamic calibration system, and manufacture the vehicle-mounted dynamic calibration system, which includes a transport vehicle, a dynamic force source loading device, Force sensor, pressure-bearing base plate and control device; the control device controls the output of the dynamic force source loading device. During the loading process of the dynamic force source loading device, the dynamic truck scale outputs the detection weight, and the force sensor outputs the reference weight accordingly. Data comparison, the dynamic weighing error of the dynamic truck scale is obtained, and the calibration of the dynamic truck scale is realized; the transport vehicle is used to transport the dynamic force source loading device to the dynamic truck scale to be calibrated, and during the calibration process, the pressure The bottom plate is in contact with the weighing platform of the dynamic truck scale, but the wheels of the transport vehicle are not in contact with the weighing platform of the moving truck scale.

Compared with what is recorded in the background technology: (1) the loading force value F of the dynamic force source loading device is determined by its input current value I, and the loading force value is the axle load of the simulated vehicle, that is, the wheels of the running vehicle are in the dynamic vehicle When the scale is on the weighing platform, the force exerted on the weighing platform; the control device adjusts the input current value I, thereby adjusting the loading force value F, so that the weighing range of the dynamic truck scale can be effectively covered. (2) By inputting parameters through the keyboard, the loading situation of the dynamic force source loading device can be conveniently adjusted, and the loading situation of vehicles with different shaft types on the dynamic truck scale can be simulated. (3) Since real vehicles are not used to load the weighing platform of the dynamic truck scale, dynamic calibration does not need to be tested on the actual road. During the calibration process, the transport vehicle is parked at the position of the dynamic truck scale, which greatly reduces the occurrence of security incidents. (4) Accurately adjust the loading state and loading position of the dynamic force source loading device, avoid the parameter deviation that occurs when the vehicle is artificially controlled, and ensure the repeatability and reproducibility of the calibration process. (5) To avoid interference factors such as vehicle vibration during the driving process of the vehicle on the road, and to improve the accuracy of the calibration process of the dynamic truck scale. (6) Through data comparison, the calibration of the dynamic truck scale is realized; there is no need to use a real vehicle to load the weighing platform of the dynamic truck scale, and the calibration efficiency of the dynamic truck scale is improved.

In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Referring to Fig. 1 to Fig. 11, the preferred embodiment of the present invention.

In the prior art, when a real reference vehicle is used to calibrate a dynamic truck scale, the schematic diagram is shown in Figure 8, where L is the wheelbase of two adjacent axles of the vehicle, where the wheelbase of two adjacent axles is the vehicle in the figure The horizontal distance between the central axis of the front wheel and the central axis of the rear wheel; l is the width of the weighing platform of the dynamic truck scale. The waveform output when the dynamic truck scale is on the weighing platform, the waveform in the second column is the waveform output when the rear axle wheel of the vehicle is on the weighing platform, where t _1.1 is the time when the wheel is on the weighing platform, and t _1.2 is when the wheel is completely on the weighing platform Dwelling time, t _1.3 is the time when the wheel gets off the weighing platform, loading pulse time t ₁ =t _1.1 +t _1.2 +t _1.3 , the time between t _1.1 and t _1.3 is extremely short; corresponding t ₂ =t _2.1 +t _2.2 + t _2.3 , t ₁ =t ₂ =l/v. Time T is the time interval when the front and rear axle wheels of the vehicle enter the weighing platform, T=L/v, and v is the driving speed of the vehicle. The dynamic truck scale processes the waveform data at time t ₁ through the internal dynamic processing algorithm to obtain the axle weight m ₁ imposed by the front axle wheels, and processes the waveform data at t ₂ to obtain the axle weight m ₂ imposed by the rear axle wheels. Adding m ₁ and m ₂ is the vehicle weight m; usually, when the center of gravity of the vehicle is not in the middle position, the axle weight m ₁ applied by the front axle wheels and the axle weight m applied by the rear axle wheels ₂ is not the same. Comparing the static weight of the front axle, rear axle and the whole vehicle of the reference vehicle is the dynamic weighing error. Here, the static state of the vehicle is referred to, which refers to the state where the vehicle is stationary on the weighing platform of the dynamic truck scale.

Therefore, in order to ensure that the loading mode of the dynamic force source loading device in the present invention is consistent with the loading mode of the reference vehicle, the loading output of the dynamic force source loading device of the present invention is to simulate the loading waveform of the reference vehicle when calibrating the dynamic truck scale, as shown in Figure 10 As shown, the schematic diagram of the loading waveform of a multi-axis vehicle (2-axis, 3-axis, 4-axis, 5-axis, 6-axis).

The vehicle-mounted dynamic calibration method of the dynamic truck scale of the present invention comprises the following steps:

S1. Calibration of the dynamic force source loading device: first drive the vehicle-mounted dynamic calibration system to the calibration position, which can be a flat and open rigid ground; the rigid ground is, for example, concrete ground or rocky ground. Then press the pressure-bearing base plate 4 close to the rigid ground, adjust the input current value I of the dynamic force source loading device, the dynamic force source loading device outputs a loading force value F, and accordingly the reference weight M output by the force sensor 3, The reference weight M is a detected value of the loading force value F. Since the loading force value F of the dynamic force source loading device is determined by the input current value I, the functional relationship F=f(I) between the loading force value F and the input current value I is obtained, and the functional relationship F=f (I) stored in the control device. For example, when I=10A, F=50kN; That is, when the input current of the dynamic force source loading device 2 is set to 10A, the output loading force value of the output shaft 21 of the dynamic force source loading device 2 is 50kN, that is, the force sensor 3 The output reference weight is also 50kN. In this way, as long as the parameters of the required loading force value are input to the control device 5, the control device 5 automatically adjusts the input current value of the dynamic force source loading device 2 according to this functional relationship, so that the dynamic force source loading device 2 outputs the required loading. force value.

S10. Preparation stage: drive the vehicle-mounted dynamic calibration system to the position of the dynamic truck scale. The vehicle-mounted dynamic calibration system includes a transport vehicle 1, a dynamic force source loading device 2, a force sensor 3, a pressure-bearing base plate 4 and a control device 5 The transport vehicle 1 includes a headstock 11 and a compartment 12, the front end 11 is fixedly connected to the compartment 12, the bottom plate of the compartment 12 is provided with a through hole, and the dynamic force source loading device 2 is fixed on the compartment 12 inside, the output shaft 21 of the dynamic force source loading device 2 is slidingly connected with the through hole; the output shaft 21 of the dynamic force source loading device 2 is also fixedly connected with the upper side of the force sensor 3, the The pressure-bearing bottom plate 4 is fixedly connected to the lower side of the force sensor 3, the control device 5 is electrically connected to the dynamic force source loading device 2, and the pressure-bearing bottom plate 4 is located on the weighing platform 82 of the dynamic truck scale 8 above.

The vehicle-mounted dynamic calibration system also includes a supporting leg device 7, which is fixedly connected to the compartment 12, and the control device 5 is also electrically connected to the supporting leg device 7, and the supporting leg device 7 Located above the base 81 of the dynamic truck scale 8 . The supporting leg device 7 supports the compartment 12 and improves the body balance of the transport vehicle 1 during the calibration process. The control device 5 adjusts the supporting state of the supporting leg device 7 .

The supporting leg device 7 includes a supporting base plate 71, a vertical telescopic mechanism 72 and a lateral telescopic mechanism 73. It is fixedly connected with the body of the vertical telescopic mechanism 72, and the telescopic rod of the vertical telescopic mechanism 72 is fixedly connected with the support base plate 71; after the transport vehicle 1 reaches the position of the dynamic truck scale 8, the The control device 5 sequentially controls the horizontal telescopic mechanism 73 and the vertical telescopic mechanism 72, so that the support base plate 71 moves from the compartment 12 to the top of the base 81 of the dynamic truck scale 8, and the support base plate 71 touches Hold the base 81 of the dynamic truck scale 8. The supporting leg arrangement 7 improves the body balance of the transport vehicle 1 during the calibration process.

The transport vehicle 1 stops at the position of the dynamic truck scale 8, and it is confirmed that the wheels of the transport vehicle 1 are not in contact with the weighing platform 82. In the case where there is a stroke H between the pressure base plate 4 and the weighing platform 82 , a preload test needs to be performed.

S11. Preloading test: the output shaft 21 of the dynamic force source loading device 2 moves toward the weighing platform 82 of the dynamic truck scale 8 for a stroke H, as shown in FIG. 5 , until the pressure-bearing base plate 4 and the The gap of the weighing platform 82 of the dynamic truck scale 8 is zero, the control device 5 is initialized, and then the dynamic force source loading device 2 applies a force value F ₀ of an appropriate size to the weighing platform 82 of the dynamic truck scale 8 to ensure that the The pressure-bearing bottom plate 4 is pressed tightly against the weighing platform 82 of the dynamic truck scale 8. At this time, the force sensor 3 outputs a reference weight M ₀ , and the dynamic truck scale 8 outputs a detected weight m ₀ , and at the same time, the The force sensor 3 and the dynamic truck scale 8 are reset. The preloading test is to ensure that the output end of the dynamic force source loading device 2, that is, the pressure-bearing base plate 4, is in contact with the weighing platform 82 of the dynamic truck scale 8 without gaps, and to prevent the impact effect caused by the empty stroke during the loading process.

S20. Setting parameters: the parameters include the loading force value F of the dynamic force source loading device 2, the loading pulse time t and the interval time T, and input the parameters into the control device 5;

The parameters also include the wheelbase L of the adjacent two axles of the vehicle, the driving speed v of the vehicle, the weighing platform width l of the dynamic truck scale 8, the loading pulse time t is equal to l/v, and the interval time T is equal to L /v. The loading pulse time t is the time when the wheels of the vehicle 9 travel on the weighing platform 82 of the dynamic truck scale 8 . The interval time T is the time when the front axle wheels 91 of the vehicle 9 leave the weighing platform 82 of the dynamic truck scale 8 and the rear axle wheels 92 of the vehicle 9 have not yet entered the weighing platform 82 of the dynamic truck scale 8 . According to the situation of the vehicle 9 to be simulated, the wheelbase L of the adjacent two axles of the vehicle 9 can be measured; the width of the weighing platform 82 of the dynamic truck scale 8 can be directly measured; according to the calibration requirements, the travel speed v of the vehicle 9 is set with the loading force value F. For a two-axle vehicle, there is only the wheelbase L between two adjacent axles of one vehicle.

The parameters also include the axle type N of the vehicle, N≥2, the wheelbase of two adjacent axles of the vehicle is specifically L _j , 1≤j≤N-1, N and j are both positive integers, and the interval time Specifically, T _j , T _j =L _j /v. For vehicles with more than three axles, there are correspondingly more than two wheelbases between adjacent two axles of the vehicle. For example, a three-axle vehicle: N=3, the wheelbases of two adjacent axles of the vehicle are L ₁ , L ₂ ; the interval time is T ₁ and T ₂ . Four-axle vehicle: N=4, the wheelbases of two adjacent axles of the vehicle are L ₁ , L ₂ , L ₃ ; the intervals are T ₁ , T ₂ , T ₃ . In this way, the non-physical dynamic calibration system of the dynamic truck scale 8 of the present invention can simulate vehicles of various axle types to calibrate the dynamic truck scale 8 .

The parameters also include a minimum loading force value F _min and a maximum loading force value F _max , an incremental force value F _inc , and the loading force value F is between the minimum loading force value F _min and the maximum loading force value F _max from small to large Select in sequence. The minimum loading force value F _min is the minimum weighing of the dynamic truck scale 8, and the maximum loading force value F _max is the maximum weighing of the dynamic truck scale. Thereby realizing the dynamic loading covering the weighing range of the dynamic truck scale.

S30. Loading test: the control device 5 controls the dynamic force source loading device 2 according to the parameters, so that the pressure-bearing base plate 4 exerts a downward force on the weighing platform 82 of the dynamic truck scale 8; The wheels of the vehicle 9 drive into the weighing platform 82 of the dynamic truck scale 8, and the corresponding dynamic force source loading device 2 outputs the loading force value so that the pressure-bearing base plate 4 exerts a downward force on the weighing platform 82 of the dynamic truck scale 8; the vehicle 9 The wheels leave the weighing platform 82 of the dynamic truck scale 8, corresponding to the dynamic force source loading device 2 canceling the output loading force value.

S40. Calibration test: the dynamic truck scale 8 outputs a detected weight m, and the force sensor 3 outputs a reference weight M accordingly, and compares the detected weight m with the reference weight M to obtain the dynamic weight of the dynamic truck scale 8 Weighing error; the reference weight M output by the force sensor 3 is consistent with the loading force value F of the set parameter. For the case of simulating a two-axle vehicle, after inputting the parameters of the two-axle vehicle, after a loading test, the dynamic truck scale 8 outputs the detected weight m ₁ corresponding to the front axle wheel 91 and the detected weight m ₂ corresponding to the rear axle wheel 92, m ₁ + m ₂ is the vehicle weight of the two-axle vehicle. Compare the reference weight M ₁ corresponding to the front axle wheel 91 output by the force sensor 3 , the reference weight M ₂ corresponding to the rear axle wheel 92 , and the vehicle weight M ₁ +M ₂ . It is the dynamic weighing error of the dynamic truck scale 8 of the two-axle vehicle 9 at a certain speed. After changing the shaft type data and speed data and then performing the test, it can be concluded that the dynamic truck scale 8 has different shaft types and different speeds. The following weighing error.

S41. Repeatability test: Repeat S30 to S40 multiple times, record the test results, and calculate the repeatability error. That is, it is simulated that a real vehicle 9 drives past the weighing platform 82 of the dynamic truck scale 8 for many times. Since the real vehicle 9 is canceled to calibrate the dynamic truck scale, by setting the parameters of the number of tests in the control device 5, the non-physical dynamic calibration system using the dynamic truck scale 8 is very convenient and efficient for repeated testing.

S42. Eccentric load test: the weighing platform 82 of the dynamic truck scale 8 is divided into multiple loading areas, adjust the position of the vehicle-mounted dynamic calibration system so that the pressure-bearing base plate 4 is in different loading areas, and turn to S30 ; When all loading areas are tested, go to S50. As shown in FIG. 10 , the weighing platform 82 is divided into three loading areas, namely the middle 821 , the left 822 , and the right 823 . The simulated real vehicle 9 runs from the middle 821 , the left 822 and the right 823 of the weighing platform 82 . Adjust the positions of the dynamic force source loading device 2 and the pressure base plate 4 to the middle 821 , the left side 822 and the right side 823 of the weighing platform 82 . Adjust the positions of the dynamic force source loading device 2 and the pressure-bearing base plate 4 by driving the transport vehicle 1, and put away the supporting leg device 7 before driving the transport vehicle 1; after confirming the position, place the supporting leg device 7 on the dynamic On the base 81 of the truck scale 8.

S50, completing the calibration of the dynamic truck scale 8 . Driving the transport vehicle 1 away from the dynamic truck scale 8 does not need to manually move the dynamic force source loading device 2 , and the transport vehicle 1 and the dynamic force source loading device 2 are an integral product, which greatly improves the calibration efficiency of the dynamic truck scale 8 .

In this embodiment, the dynamic force source loading device 2 is a linear motor. The loading force value F of the dynamic force source loading device 2 is determined by the input current value I, and the control device 5 changes the loading force value F of the dynamic force source loading device 2 by adjusting the input current value I. The force sensor 3 adopts the existing high-precision force sensor 3 to accurately detect the loading force value.

The vehicle-mounted dynamic calibration system of the present invention also includes a computer 6 and a display 61, the computer 6 has a first interface, a second interface and a third interface, the first interface is connected to the display 61, and the second interface It is connected with the force sensor 3, and the third interface is used for connecting with the dynamic truck scale 8. The computer 6 receives the detected weight data output by the dynamic truck scale 8 and the reference weight data output by the force sensor 3 , and then visually displays the data on the display 61 , and displays the dynamic weighing error of the dynamic truck scale 8 .

The computer 6 , the display 61 and the control device 5 are all located inside the vehicle head 11 . The headstock 11 is a driver's cab, which is also a place for calibration personnel to input parameters. After the calibrator sees the calibration result on the display 61 , the calibrator drives the transport vehicle 1 away from the dynamic truck scale 8 , or drives the transport vehicle 1 to adjust the position of the pressure-bearing base plate 4 on the weighing platform 82 .

The outer wall of the compartment 12 is provided with a storage tank 121, the body of the horizontal telescopic mechanism 73 is located in the storage tank 121 and is fixedly connected, and the vertical telescopic mechanism 72 and the support base plate 71 can be accommodated in the storage tank 121. Slot 121. The control device 5 controls the telescopic rod of the horizontal telescopic mechanism 73 to elongate first, and the supporting base plate 71 and the vertical telescopic mechanism 72 leave the storage tank 121, and then the telescopic rod of the vertical telescopic mechanism 72 is extended again, and the supporting base plate 71 moves downward and Arrest on the base 81 of dynamic truck scale 8. When the support base plate 71 and the vertical telescopic mechanism 72 need to be accommodated, the control device 5 controls the telescopic rod of the vertical telescopic mechanism 72 to shorten first, so that the support base plate 71 moves upwards, and then the telescopic rod of the horizontal telescopic mechanism 73 is shortened again. The supporting bottom plate 71 and the vertical telescopic mechanism 72 enter the storage tank 121 .

Described horizontal expansion mechanism 73 is electric push rod, and control device 5 controls electric push rod through existing electrical system; level cylinder.

There are four supporting leg devices 7 , which are respectively located at the four corners of the compartment 12 of the transport vehicle 1 , and the dynamic force source loading device 2 is located in the middle of the compartment 12 . Effectively improve the body balance of the transport vehicle 1 during the calibration process.

The vehicle-mounted dynamic calibration system of the present invention also includes an adapter 22, the output shaft 21 of the dynamic force source loading device 2 is fixedly connected to the adapter 22, and the adapter 22 and the force sensor 3 are locked by bolts connect. The force sensor 3 is also connected to the pressure-bearing base plate 4 by bolts. When the force sensor 3 breaks down, it is convenient to replace the force sensor 3 .

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments we have described are only illustrative, rather than used to limit the scope of the present invention. Equivalent modifications and changes made by skilled personnel in accordance with the spirit of the present invention shall fall within the protection scope of the claims of the present invention.

Claims (10)

1. A vehicle-mounted dynamic calibration method of a dynamic truck scale, characterized in that, comprising the following steps: S10. Preparation stage: drive the vehicle-mounted dynamic calibration system to the position of the dynamic truck scale. The vehicle-mounted dynamic calibration system includes a transport vehicle, a dynamic force source loading device, a force sensor, a pressure-bearing floor and a control device. The transport vehicle It includes the front of the car and the compartment, the front of the car is fixedly connected with the compartment, the bottom plate of the compartment is provided with a through hole, the dynamic force source loading device is fixed inside the compartment, and the output shaft of the dynamic force source loading device Slidingly connected with the through hole, the output shaft of the dynamic force source loading device is also fixedly connected with the upper side of the force sensor, the pressure-bearing bottom plate is fixedly connected with the lower side of the force sensor, and the control device It is electrically connected with the dynamic force source loading device, and the pressure-bearing bottom plate is located above the weighing platform of the dynamic truck scale; S20. Setting parameters: the parameters include the loading force value F of the dynamic force source loading device, the loading pulse time t and the interval time T, and input the parameters to the control device; S30. Loading test: the control device controls the dynamic force source loading device according to the parameters, so that the pressure-bearing bottom plate exerts a downward force on the weighing platform of the dynamic truck scale; S40. Calibration test: the dynamic truck scale outputs a detected weight m, and the force sensor outputs a reference weight M accordingly, and compares the detected weight m with the reference weight M to obtain the dynamic weighing error of the dynamic truck scale ; S50, completing the calibration of the dynamic truck scale. 2. The vehicle-mounted dynamic calibration method of a dynamic truck scale according to claim 1, wherein said parameters also include the wheelbase L of two adjacent axles of the vehicle, the running speed v of the vehicle, the dynamic truck scale The weighing platform width l, the loading pulse time t is equal to l/v, and the interval time T is equal to L/v. 3. The vehicle-mounted dynamic calibration method of a dynamic truck scale according to claim 2, wherein the parameters also include the axle type N of the vehicle, N≥2, and the axles of two adjacent axles of the vehicle The interval is specifically L _j , 1≤j≤N-1, N and j are both positive integers, and the interval time is specifically T _j , T _j =L _j /v. 4. A vehicle-mounted dynamic calibration method for a dynamic truck scale according to claim 1, wherein the parameters further include a minimum loading force value F _min , a maximum loading force value F _max and an incremental force value F _inc , The loading force value F is selected in descending order between the minimum loading force value F _min and the maximum loading force value F _max . 5. The vehicle-mounted dynamic calibration method of a dynamic truck scale according to claim 1, characterized in that, before said S10, S1 is also included; S1. Calibration of the dynamic force source loading device: first drive the vehicle-mounted dynamic calibration system to the calibration position, then press the pressure-bearing base plate close to the rigid ground, and adjust the input current value I of the dynamic force source loading device, The dynamic force source loading device outputs the loading force value F, because the loading force value F of the dynamic force source loading device is determined by the input current value I, thereby obtaining the functional relationship between the loading force value F and the input current value I F=f(I), the functional relationship F=f(I) is stored in the control device. 6. The vehicle-mounted dynamic calibration method of a dynamic truck scale according to claim 1, characterized in that S11 is also included after said S10; S11. Preloading test: the output shaft of the dynamic force source loading device moves toward the weighing platform of the dynamic truck scale for a distance H until the gap between the pressure-bearing base plate and the weighing platform of the dynamic truck scale is zero, The control device is initialized, and then the dynamic force source loading device applies a force value F ₀ of an appropriate size to the weighing platform of the dynamic truck scale, so as to ensure that the pressure-bearing base plate is pressed tightly against the weighing platform of the dynamic truck scale, At this time, the force sensor outputs a reference weight M ₀ , and the dynamic truck scale outputs a detected weight m ₀ , and then simultaneously resets the force sensor and the dynamic truck scale. 7. The vehicle-mounted dynamic calibration method of a dynamic truck scale according to claim 1, characterized in that, after said S40, S41 is also included; S41. Repeatability test: Repeat S30 to S40 multiple times, record the test results, and calculate the repeatability error. 8. The vehicle-mounted dynamic calibration method of a dynamic truck scale according to claim 1, characterized in that, after said S40, S42 is also included; S42. Unbalanced load test: the weighing platform of the dynamic truck scale is divided into multiple loading areas, and the position of the vehicle-mounted dynamic calibration system is adjusted so that the pressure-bearing base plate is in different loading areas, and then go to S30; when all The loading area is all tested, go to S50. 9. The vehicle-mounted dynamic calibration method of a dynamic truck scale according to claim 1, characterized in that, in the S10, the vehicle-mounted dynamic calibration system also includes a supporting leg device, and the supporting leg device and The compartment is fixedly connected, the control device is also electrically connected with the supporting leg device, and the supporting leg device is located above the base of the dynamic truck scale. 10. A vehicle-mounted dynamic calibration method for a dynamic truck scale according to claim 9, wherein the supporting leg device includes a supporting base plate, a vertical telescopic mechanism and a horizontal telescopic mechanism, and the body of the horizontal telescopic mechanism Fixed on the outer side wall of the compartment, the telescopic rod of the horizontal telescopic mechanism is fixedly connected with the body of the vertical telescopic mechanism, and the telescopic rod of the vertical telescopic mechanism is fixedly connected with the supporting floor; After the transport vehicle arrives at the position of the dynamic truck scale, the control device sequentially controls the horizontal telescopic mechanism and the vertical telescopic mechanism to move the supporting base plate from the compartment to the dynamic truck scale Above the pedestal of the vehicle scale, the support base plate is against the pedestal of the dynamic truck scale.

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