A non-physical dynamic calibration method for a dynamic truck scale

Abstract

The application provides a non-physical dynamic calibration method of a dynamic truck scale, comprising the following steps: S10, equipment installation: installing a non-physical dynamic calibration system on the dynamic truck scale; S20, parameter setting: the parameters include a loading force value F, a loading pulse time t and an interval time T of a dynamic force source loading device, and the parameters are input to a control device; S30, loading test: the control device controls the dynamic force source loading device according to the parameters, so that a pressure bearing bottom plate exerts a downward force on a scale platform of the dynamic truck scale; S40, calibration test: the dynamic truck scale outputs a detection weight m, and a force sensor outputs a reference weight M correspondingly; the detection weight m and the reference weight M are compared, and a dynamic weighing error of the dynamic truck scale is obtained; and S50, completing the calibration of the dynamic truck scale. The application has the advantages that the loading condition when a vehicle passes through the dynamic truck scale is simulated, the output of the dynamic force source loading device is controlled by the control device, and the calibration efficiency of the dynamic truck scale is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of truck scale calibration, in particular to a non-physical dynamic calibration method of dynamic truck scale. BACKGROUND

[0002] The dynamic truck scale is an automatic scale with a carrier and a ramp, which can automatically weigh the running vehicle and determine the total mass and / or axle load of the vehicle, and in some cases, the axle group load of the vehicle.

[0003] The dynamic calibration of the dynamic truck scale is currently carried out according to the verification regulation JJG 907 "Dynamic Road Vehicle Automatic Scale", 10 tests are carried out on the reference vehicle with different axle types in the specified speed range, and the following requirements are met: 6 times through the center of the carrier (scale table); 2 times through the left side of the carrier (scale table); 2 times through the right side of the carrier (scale table). The reference vehicle should be appropriately loaded or unloaded to cover the weighing range of the dynamic truck scale as much as possible, and the dynamic test should be carried out at the maximum scale Max (not less than 80% Max), near the minimum scale Min and the commonly used scale.

[0004] The verification method has many problems: (1) the mass of the reference vehicle cannot cover the weighing range of the dynamic truck scale, and even cannot reach the minimum scale and the maximum scale of the dynamic truck scale; (2) the calibration efficiency is low, at least 4 types of axle vehicles are needed for dynamic calibration, each type of axle is tested 10 times, the workload is large, and the efficiency is low; (3) poor safety, dynamic calibration needs to be tested on the actual road, and the maximum speed reaches 80km / h, in case of sudden conditions, safety accidents are easy to occur; (4) low accuracy of verification, since the vehicle is controlled by human, the consistency of speed, acceleration and loading position in the two running processes cannot be guaranteed, so the repeatability and reproducibility of the calibration process cannot be guaranteed. (5) due to the road factors, vehicle vibration and other interference factors in the vehicle running process, the dynamic truck scale calibration process is inaccurate.

[0005] Therefore, it is necessary to study a non-physical dynamic calibration system of dynamic truck scale. Here, the calibration of dynamic truck scale using real vehicles is called physical dynamic calibration, and the calibration of dynamic truck scale without using real vehicles is called non-physical dynamic calibration. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a non-physical dynamic calibration method of dynamic truck scale, which improves the calibration efficiency of dynamic truck scale.

[0007] The present application is implemented as follows: a non-physical dynamic calibration method of dynamic truck scale, comprising the following steps:

[0008] S10, equipment installation: install a non-physical dynamic calibration system on the base of the dynamic truck scale, the non-physical dynamic calibration system comprising a force bearing frame, a dynamic force source loading device, a force sensor, a pressure bearing bottom plate and a control device, the housing of the dynamic force source loading device being fixedly connected with the force bearing frame, the output shaft of the dynamic force source loading device being fixedly connected with the upper side of the force sensor, the pressure bearing bottom plate being fixedly connected with the lower side of the force sensor, the control device being connected with the dynamic force source loading device through a cable, the force bearing frame being fixedly connected with the base of the dynamic truck scale, and the pressure bearing bottom plate being located above the scale platform of the dynamic truck scale;

[0009] S20, parameter setting: the parameters include the loading force value of the dynamic force source loading device F , loading pulse time t and interval time T , and the parameters are input to the control device;

[0010] S30, loading test: the control device controls the dynamic force source loading device according to the parameters, so that the pressure bearing bottom plate applies a downward force to the scale platform of the dynamic truck scale;

[0011] S40, calibration test: the dynamic truck scale outputs a detected weight m , and the force sensor outputs a reference weight M correspondingly, the detected weight m and the reference weight M are compared, and the dynamic weighing error of the dynamic truck scale is obtained;

[0012] S50, the calibration of the dynamic truck scale is completed.

[0013] Further, the parameters further include the wheelbase of the adjacent two axles of the vehicle L , the driving speed of the vehicle v , the width of the scale platform of the dynamic truck scale l , the loading pulse time t is equal to l / v , and the interval time T is equal to L / v .

[0014] Further, the parameters further include the axle type of the vehicle N , N ≥2, the wheelbase of the adjacent two axles of the vehicle is specifically L j , 1≤ j ≤ N -1, N and jAll are positive integers, the interval time is specifically T j , T j =L j / v .

[0015] Further, the parameters further include minimum loading force value F min , maximum loading force value F max and incremental force value F inc , the loading force value F is sequentially selected from small to large between the minimum loading force value F min and the maximum loading force value F max .

[0016] Further, before the S10, it further includes S1;

[0017] S1, calibration of the dynamic force source loading device: the pressure bottom plate is tightly attached to the rigid ground, the input current value I of the dynamic force source loading device is adjusted, the output loading force value F of the dynamic force source loading device is obtained, since the loading force value F of the dynamic force source loading device is determined by the input current value I , the function relationship F between the loading force value I and the input current value F = f(I) is obtained, and the function relationship F = f(I) is stored in the control device.

[0018] Further, after the S10, it further includes S11;

[0019] S11, preloading test: the output shaft of the dynamic force source loading device moves a stroke H towards the scale platform of the dynamic truck scale, until the gap between the pressure bottom plate and the scale platform of the dynamic truck scale is zero, the control device is initialized, then the dynamic force source loading device applies a force value F 0 of appropriate size to the scale platform of the dynamic truck scale, ensures that the pressure bottom plate is tightly attached to the scale platform of the dynamic truck scale, at this time the force sensor outputs a reference weight M 0 , the dynamic truck scale outputs a detected weight m 0 , and the force sensor and the dynamic truck scale are cleared at the same time.

[0020] Further, after the S40, S41 is further included;

[0021] S41, repeatability test: repeat S30 to S40 multiple times, and record the test results, and calculate the repeatability error.

[0022] Further, after the S40, S42 is further included;

[0023] S42, bias test: the scale platform of the dynamic truck scale is divided into multiple loading areas, the pressure plate is adjusted in different loading areas, and S30 is turned to; when all the loading areas are tested, S50 is turned to.

[0024] Further, the dynamic force source loading device can move laterally and longitudinally on the bearing frame.

[0025] Further, the non-physical dynamic calibration system further comprises a lateral driving mechanism and a longitudinal driving mechanism, and the lateral driving mechanism and the longitudinal driving mechanism are electrically connected with the control device;

[0026] The bearing frame comprises a column, a cross beam, a support plate, a longitudinal beam and a support plate, the longitudinal beam is fixedly connected with the upper end of the column, the lower end of the column is fixedly connected with the foundation of the dynamic truck scale, the support plate is slidingly connected with the longitudinal beam, the cross beam is fixedly connected with the support plate, the support plate is slidingly connected with the cross beam, the shell of the dynamic force source loading device is fixedly connected with the support plate, the lateral driving mechanism controls the sliding state of the support plate, and the longitudinal driving mechanism controls the sliding state of the support plate.

[0027] The advantages of the present application are: 1, simulate the loading condition when the vehicle passes through the dynamic truck scale, the control device controls the output of the dynamic force source loading device, the dynamic truck scale outputs the detected weight during the loading process of the dynamic force source loading device, and the force sensor outputs the reference weight accordingly, and the calibration of the dynamic truck scale is realized through data comparison; the calibration does not need to use real vehicles, and the calibration efficiency of the dynamic truck scale is improved. 2, by changing the input parameters, the loading condition of the dynamic force source loading device can be conveniently adjusted. 3, by setting the test number parameter in the control device, the repeatability test can be very conveniently and efficiently carried out. 4, according to the loading area of the dynamic truck scale, the position of the dynamic force source loading device in the transverse and longitudinal directions of the rack is adjusted, and the bias test is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0028] The present application will be further described below with reference to the embodiments combined with the drawings.

[0029] Figure 1 is the execution flowchart of the non-physical dynamic calibration method of the dynamic truck scale of the present application.

[0030] Figure 2 is the structural schematic perspective of the non-physical dynamic calibration system in the present application Figure 1 .

[0031] Figure 3 is the structural schematic perspective of the non-physical dynamic calibration system in the present application Figure 2 .

[0032] Figure 4 is the structural schematic front view of the non-physical dynamic calibration system in the present application.

[0033] Figure 5 is the top view of Figure 4 .

[0034] Figure 6 is the left view of Figure 4 .

[0035] Figure 7 is the position schematic view of the pressure bottom plate, force sensor, adapter and scale platform in the present application.

[0036] Figure 8 is the position schematic view of the support plate and the first rolling bearing in the present application.

[0037] Figure 9 is the position schematic view of the crossbeam, connecting plate, support plate and the second rolling bearing in the present application.

[0038] Figure 10 is the connection schematic view of the control device and the computer in the present application.

[0039] Figure 11 is the schematic view of the reference vehicle passing through the dynamic truck scale in the prior art.

[0040] Figure 12 is the output waveform diagram of the two-axle vehicle loading condition of the dynamic truck scale in the prior art.

[0041] Figure 13 is the output waveform diagram of the multi-axle vehicle loading condition of the dynamic truck scale in the prior art.

[0042] Figure 14 is the loading area schematic view of the dynamic truck scale in the prior art.

[0043] Figures: bearing frame 1; column 11; beam 12; first threaded hole 121; support plate 13; first rolling bearing 131; first positioning hole 132; longitudinal beam 14; second positioning hole 141; support plate 15; second rolling bearing 151; second threaded hole 152; limiting beam 16; dynamic force source loading device 2; output shaft 21; adapter 22; force sensor 3; pressure bottom plate 4; control device 5; keyboard 51; computer 6; display 61; transverse driving device 7; screw rod 71; handle 72; connecting plate 73; screw hole 731; dynamic truck scale 8; base 81; scale platform 82; middle 821; left side 822; right side 823; vehicle 9; front axle wheel 91; rear axle wheel 92. DETAILED DESCRIPTION

[0044] The embodiment of the present application provides a non-physical dynamic calibration method of a dynamic truck scale, and solves the problem of using real vehicles to calibrate the dynamic truck scale in the prior art, and realizes the technical effect of improving the calibration efficiency of the dynamic truck scale.

[0045] The technical scheme in the embodiment of the present application is to solve the above-mentioned problems, and the general idea is as follows: a non-physical dynamic calibration system is manufactured by simulating the loading condition of a vehicle passing through a dynamic truck scale, the non-physical dynamic calibration system comprises a bearing frame, a dynamic force source loading device, a force sensor, a pressure bottom plate and a control device, the control device controls the output of the dynamic force source loading device, the dynamic truck scale outputs a detected weight in the loading process of the dynamic force source loading device, and correspondingly, the force sensor outputs a reference weight, through data comparison, a dynamic weighing error of the dynamic truck scale is obtained, and calibration of the dynamic truck scale is realized.

[0046] Compared with the background art: (1) the loading force value F of the dynamic force source loading device is determined by the input current value I of the dynamic force source loading device, and the loading force value is the axle load of the simulated vehicle, that is, the force exerted by the wheels of the vehicle driving on the scale platform of the dynamic truck scale on the scale platform; the control device adjusts the input current value I , so as to adjust the loading force value F, so as to effectively cover the weighing range of the dynamic truck scale. (2) By inputting parameters through the keyboard, the loading condition of the dynamic force source loading device can be conveniently adjusted, and the loading condition of vehicles of different axle types on the dynamic truck scale can be simulated. (3) Since real vehicles are not used, dynamic calibration does not need to be tested on actual roads, and the occurrence of safety accidents is greatly reduced. (4) The loading state and position of the dynamic force source loading device are accurately adjusted, so as to avoid parameter deviation caused by manual control of the vehicle, and ensure the repeatability and reproducibility of the calibration process. (5) The interference factors such as vehicle vibration occurring during the driving of the vehicle on the road are avoided, and the accuracy of the dynamic truck scale calibration process is improved. (6) The calibration of the dynamic truck scale is realized through data comparison; real vehicles are not needed, and the calibration efficiency of the dynamic truck scale is improved.

[0047] In order to better understand the above technical solutions, the above technical solutions will be described in detail in combination with the drawings of the specification and specific embodiments.

[0048] Referring to Figures 1 to 14 , the preferred embodiments of the present application.

[0049] In the prior art, when a real reference vehicle is used to calibrate a dynamic truck scale, a schematic diagram is as shown in Figure 11 , L is the wheelbase of the adjacent two axles of the vehicle, and here the wheelbase of the adjacent two axles is the horizontal distance between the front wheel center axle and the rear wheel center axle of the vehicle in the figure; l is the scale platform width of the dynamic truck scale, Figure 12 is a waveform diagram output when a two-axle vehicle passes through the dynamic truck scale: the first column of waveforms is the waveform output when the front axle wheel of the vehicle is on the scale platform of the dynamic truck scale, and the second column of waveforms is the waveform output when the rear axle wheel of the vehicle is on the scale platform, wherein t 1.1 is the time when the wheel is on the scale platform, t 1.2 is the time when the wheel completely stays on the scale platform, t 1.3 is the time when the wheel is off the scale platform, and the loading pulse time t1= t 1.1 + t 1.2 + t 1.3 , t 1.1 and t 1.3 is extremely short; accordingly, t2= t 2.1 + t 2.2 + t 2.3 , t 1= t 2 =l / v The time T is the time interval of the vehicle front and rear axle wheels entering the scale table, T = L / v , v The vehicle running speed is V. The dynamic truck scale processes the waveform data at t1 through the internal dynamic processing algorithm to obtain the axle weight applied by the front axle wheel m 1 Processes the waveform data at t2 to obtain the axle weight applied by the rear axle wheel t 2 The axle weight applied by the front axle wheel m 2 After that, m 1 And m 2 The sum is the whole vehicle weight m ; usually, when the center of gravity of the vehicle is not in the middle position, the axle weight applied by the front axle wheel m 1 Is different from the axle weight applied by the rear axle wheel m 2 The dynamic scale weight error is obtained by comparing and referring to the static front axle, rear axle and whole vehicle weight of the vehicle. The static vehicle refers to the state that the vehicle is stationary and stops on the scale table of the dynamic truck scale.

[0050] Therefore, in order to ensure that the loading mode of the dynamic force source loading device in the application is consistent with the loading mode of the reference vehicle, the loading output of the dynamic force source loading device in the application is to simulate the loading waveform when the reference vehicle calibrates the dynamic truck scale, as shown in Figure 13 The loading waveform schematic diagram of the multi-axle vehicle (2-axle, 3-axle, 4-axle, 5-axle, 6-axle).

[0051] The non-physical dynamic calibration method of the dynamic truck scale of the application comprises the following steps:

[0052] S1, calibration of the dynamic force source loading device: the pressure bearing bottom plate 4 is tightly attached to the rigid ground, such as concrete ground, rock ground, etc.; the input current value of the dynamic force source loading device 2 is adjusted I , the dynamic force source loading device 2 outputs the loading force value F , and the reference weight output by the force sensor 3 is correspondingly M The reference weight M is the detection value of the loading force value F . Since the loading force value F of the dynamic force source loading device 2 is determined by the input current value I , the functional relationship F between the loading force value I and the input current value F = f(I), to functional relationship F = f(I) Stored in the control device 5. For example, when I When =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 of the output shaft 21 of the dynamic force source loading device 2 is 50kN, which means that the reference weight output by the force sensor 3 is also 50kN. In this way, as long as the parameter of the required loading force value is input to the control device 5, the control device 5 will automatically adjust 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.

[0053] S10. Equipment Installation: The non-physical dynamic calibration system is installed on the foundation of the dynamic truck scale, also known as the base. The non-physical dynamic calibration system includes a load-bearing frame 1, a dynamic force source loading device 2, a force sensor 3, a pressure-bearing base plate 4, and a control device 5. The housing of the dynamic force source loading device 2 is fixedly connected to the load-bearing frame 1. The output shaft 21 of the dynamic force source loading device 2 is fixedly connected to the upper side of the force sensor 3. The pressure-bearing base plate 4 is fixedly connected to the lower side of the force sensor 3. The control device 5 is connected to the dynamic force source loading device 2 via a cable. The load-bearing frame 1 is fixedly connected to the foundation 81 of the dynamic truck scale 8. The pressure-bearing base plate 4 is located above the weighing platform 82 of the dynamic truck scale 8. For cases where there is a stroke H between the pressure-bearing base plate 4 and the weighing platform 82, a pre-loading test is required.

[0054] S11, Pre-load test: The output shaft 21 of the dynamic force source loading device 2 moves a distance H in the direction of the platform 82 of the dynamic truck scale 8, such as... Figure 6 As shown, the control device 5 is initialized until the gap between the pressure-bearing base plate 4 and the weighing platform 82 of the dynamic truck scale 8 is zero. Then, the dynamic force source loading device 2 applies an appropriate force to the weighing platform 82 of the dynamic truck scale 8. F 0 This ensures that the pressure-bearing base plate 4 is pressed tightly against the weighing platform 82 of the dynamic truck scale 8, at which point the force sensor 3 outputs a reference weight. M 0 The dynamic truck scale 8 outputs the detected weight. m 0 Then, the force sensor 3 and the dynamic truck scale 8 are simultaneously zeroed. The pre-load test is to ensure that the output end of the dynamic force source loading device 2, i.e. the pressure-bearing base plate 4, makes seamless contact with the weighing platform 82 of the dynamic truck scale 8, preventing the impact effect caused by the empty stroke during the loading process.

[0055] S20. Setting parameters: The parameters include the loading force value of the dynamic force source loading device 2. Floading pulse time t and interval time T , the parameters are input to the control device 5.

[0056] The parameters also include the wheelbase of the adjacent two axles of the vehicle L , the driving speed of the vehicle v , the scale width of the dynamic truck scale l , 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 during which the wheels of the vehicle 9 travel on the scale 82 of the dynamic truck scale 8. The interval time T is the time during which the front axle wheels 91 of the vehicle 9 leave the scale 82 of the dynamic truck scale 8 while the rear axle wheels 92 of the vehicle 9 have not yet entered the scale 82 of the dynamic truck scale 8. According to the situation of the vehicle 9 to be simulated, the wheelbase of the adjacent two axles of the vehicle 9 L can be measured, the scale 82 width of the dynamic truck scale 8 can be directly measured, and according to the calibration requirements, the driving speed of the vehicle 9 v and the loading force value F are set. For a two-axle vehicle, there is only one wheelbase of the adjacent two axles of the vehicle L .

[0057] The parameters also include the axle type of the vehicle N , N ≥ 2, and the wheelbase of the adjacent two axles of the vehicle is specifically L j , 1 ≤ j ≤ N -1, N and j are positive integers, and the interval time is specifically T j , T j =L j / v For a vehicle of three axles or more, there are two or more wheelbases of the adjacent two axles of the vehicle. For example, for a three-axle vehicle: N = 3, the wheelbase of the adjacent two axles of the vehicle is L 1 , L 2 , the interval time is T 1 and T 2 . For a four-axle vehicle: N = 4, the wheelbase of the adjacent two axles of the vehicle is L1 、 L 2 、 L 3 ; interval time is T 1 、 T 2 、 T 3 Thus, the non-physical dynamic calibration system of the dynamic truck scale 8 of the present application can simulate vehicles of various axle types to calibrate the dynamic truck scale 8.

[0058] 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 values F are sequentially selected from small to large between the minimum loading force value F min and the maximum loading force value F max . The minimum loading force value F min is the minimum weighing capacity of the dynamic truck scale 8, and the maximum loading force value F max is the maximum weighing capacity of the dynamic truck scale. Thus, dynamic loading covering the weighing range of the dynamic truck scale is achieved.

[0059] S30, loading test: the control device 5 controls the dynamic force source loading device 2 according to the parameters, so that the pressure-bearing floor 4 exerts a downward force on the platform 82 of the dynamic truck scale 8; the wheels of the vehicle 9 drive into the platform 82 of the dynamic truck scale 8, and the dynamic force source loading device 2 outputs a loading force value to make the pressure-bearing floor 4 exert a downward force on the platform 82 of the dynamic truck scale 8; the wheels of the vehicle 9 leave the platform 82 of the dynamic truck scale 8, and the dynamic force source loading device 2 cancels the output of the loading force value.

[0060] S40, calibration test: the dynamic truck scale 8 outputs a detected weight m , and the force sensor 3 outputs a reference weight M ; the detected weight m is compared with the reference weight M , to obtain the dynamic weighing error of the dynamic truck scale 8; the reference weight M output by the force sensor 3 is consistent with the set parameter of the loading force value F . For the case of simulating a two-axle vehicle, after the parameters of the two-axle vehicle are input, the loading test is performed, and the dynamic truck scale 8 outputs a detected weight m1 corresponding to the rear axle wheel 92 m 2 , m 1 +m 2 corresponding to the front axle wheel 91 M 1 corresponding to the rear axle wheel 92 M 2 total vehicle weight M 1 +M 2 corresponding to the front axle wheel 91

[0061] S41, repeatability test: repeat S30 to S40 multiple times, and record the test results, and calculate the repeatability error. That is, simulate the real vehicle 9 multiple times through the scale platform 82 of the dynamic truck scale 8. Since the real vehicle 9 is cancelled, by setting the test number parameter in the control device, the non-physical dynamic calibration system of the dynamic truck scale 8 is very convenient and efficient for repeatability test.

[0062] S42, bias load test: the scale platform 82 of the dynamic truck scale 8 is divided into multiple loading areas, the pressure bearing floor 4 is adjusted in different loading areas, and S30 is turned to; when all the loading areas are tested, S50 is turned to. The scale platform 82 is divided into three loading areas, namely the middle 821, the left 822 and the right 823. Simulate the real vehicle 9 driving from the middle 821, the left 822 and the right 823 of the scale platform 82. The position of the dynamic force source loading device 2 and the pressure bearing floor 4 is adjusted to the middle 821, the left 822 and the right 823 of the scale platform 82. The position of the dynamic force source loading device 2 on the rack is adjusted by the transverse driving device 7 and the longitudinal driving device.

[0063] S50, complete the calibration of the dynamic truck scale.

[0064] The dynamic force source loading device can move transversely and longitudinally on the force bearing frame.

[0065] The non-physical dynamic calibration system further comprises a transverse driving mechanism and a longitudinal driving mechanism, both of which are electrically connected with the control device; the transverse driving device 7 and the longitudinal driving device can adopt other existing driving devices. The working state of the transverse driving device and the longitudinal driving device is controlled by the control device.

[0066] The force bearing frame 1 comprises a column 11, a crossbeam 12, a support plate 13, a longitudinal beam 14 and a support plate 15, the longitudinal beam 14 is fixedly connected with the upper end of the column 11, the support plate 15 is slidably connected with the longitudinal beam 14, the crossbeam 12 is fixedly connected with the support plate 15, the support plate 13 is slidably connected with the crossbeam 12, the shell of the dynamic force source loading device 2 is fixedly connected with the support plate 13; according to the loading area of the dynamic truck scale 8, the position of the dynamic force source loading device 2 in the transverse direction and the longitudinal direction of the rack is adjusted, so as to facilitate the unbalanced load test. Generally, the dynamic truck scale 8 has two scales 82 corresponding to the same row of left and right wheels of the vehicle 9. The position of the dynamic force source loading device 2 is adjusted to calibrate the two scales 82 in turn. The transverse driving device controls the sliding state of the support plate 13, and the longitudinal driving mechanism controls the sliding state of the support plate 15.

[0067] The frame 1 further comprises a first rolling bearing 131, the support plate 13 has a first cylindrical shaft, the first cylindrical shaft is fixedly connected with the inner ring of the first rolling bearing 131, and the outer ring of the first rolling bearing 131 is arranged on the upper surface of the crossbeam 12; the movement of the support plate 13 on the crossbeam 12 is rolling friction.

[0068] The frame 1 further comprises a second rolling bearing 151, the support plate 15 has a second cylindrical shaft, the second cylindrical shaft is fixedly connected with the inner ring of the second rolling bearing 151, and the outer ring of the second rolling bearing 151 is arranged on the upper surface of the longitudinal beam 14. The movement of the support plate 15 on the longitudinal beam 14 is rolling friction.

[0069] The frame 1 further comprises a limiting beam 16, two limiting beams 16 are respectively fixedly arranged at the front and rear ends of the longitudinal beam 14 to ensure the structural rigidity of the longitudinal beam 14; the limiting beam 16 limits the longitudinal movement range of the support plate 15. Two longitudinal beams 14 limit the transverse movement range of the support plate 13. A guide plate is arranged along the length direction of the longitudinal beam 14, and the guide plate prevents the position of the support plate 15 from deviating during longitudinal movement.

[0070] The column 11 is arranged along the two sides of the scale 82 by a plurality of double-headed studs, one end of the column 11 is connected with the base 81 of the dynamic truck scale 8 through bolts, and corresponding threaded holes are implanted on the base 81 of the dynamic truck scale 8 by high-strength chemical adhesive. The other end of the column 11 is fixedly connected with the longitudinal beam 14 through a plurality of threads, and the number of threaded connections is selected according to actual needs on site.

[0071] In the calibration process, the force frame 1 plays a supporting role, and the pressure bottom plate 4 is located above the scale table 82 of the dynamic truck scale 8; the control device 5 controls the output of the dynamic force source loading device 2, and the output shaft 21 of the dynamic force source loading device 2 moves downward, and when the pressure bottom plate 4 tightly abuts against the scale table 82 and exerts a downward force, it simulates that the wheels of the vehicle 9 travel on the scale table 82 of the dynamic truck scale 8, at which time the dynamic truck scale 8 outputs a detected weight, and the force sensor 3 outputs a reference weight, which is the detected loading force value of the dynamic force source loading device 2; when the dynamic force source loading device 2 cancels the loading force value, the dynamic truck scale 8 does not output a detected weight, and the force sensor 3 does not output a reference weight, which simulates that the wheels of the vehicle 9 leave the scale table 82 of the dynamic truck scale 8. By comparing the detected weight with the reference weight, the dynamic weighing error of the dynamic truck scale 8 is obtained, and the calibration of the dynamic truck scale 8 is realized.

[0072] 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 adjusts the input current value I to change the loading force value F of the dynamic force source loading device 2. The force sensor 3 is a high-precision force sensor 3 that accurately detects the loading force value.

[0073] The non-physical dynamic calibration system further comprises a keyboard 51, which is electrically connected with the control device 5. Parameters are input through the keyboard 51 to conveniently adjust the loading condition of the dynamic force source loading device 2. The parameters include the axle type of the vehicle N , the wheelbase of the adjacent two axles of the vehicle L , the driving speed of the vehicle v , the width of the scale table l , the added force value F, the loading pulse time t , the interval time T .

[0074] The non-physical dynamic calibration system further comprises a computer 6, a dynamic truck scale 8 and a display 61, the force sensor 3 and the dynamic truck scale 8 are electrically connected with the computer 6, and the computer 6 is further electrically connected with the display 61. The computer 6 receives the data of the detected weight output by the dynamic truck scale 8 and the data of the parameter weight 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.

[0075] The non-physical dynamic calibration system further comprises an adapter 22, the output shaft 21 of the dynamic force source loading device 2 is fixedly connected with the adapter 22, and the adapter 22 is connected with the force sensor 3 through bolt locking. The force sensor 3 is also connected with the pressure bottom plate 4 through bolt locking. When the force sensor 3 fails, the force sensor 3 can be easily replaced.

[0076] In the non-physical dynamic calibration system, the lateral driving device and the longitudinal driving device can be manually operated, and the lateral driving device and the longitudinal driving device are not electrically connected with the control device. The lateral driving device 7 comprises a screw rod 71, a handle 72, a connecting plate 73 and a lateral positioning screw, the connecting plate 73 is fixedly connected with the crossbeam 12, the connecting plate 73 is provided with a screw hole 731, the screw rod 71 is screw-connected with the screw hole 731, one end of the screw rod 71 can abut against the shell of the dynamic force source loading device 2, the other end of the screw rod 71 is fixedly connected with the center of the handle 72, and two screw rods 71, handles 72 and connecting plates 73 are respectively arranged on the left and right sides of the dynamic force source loading device. When the handle 72 is rotated forward, one end of the screw rod 71 is close to the shell of the dynamic force source loading device 2, when the handle 72 is rotated reversely, one end of the screw rod 71 is away from the shell of the dynamic force source loading device 2, when the screw rods 71 on the left and right sides of the dynamic force source loading device are both moved to the left, one end of the screw rod 71 on the right side pushes the shell of the dynamic force source loading device 2, and when the screw rods 71 on the left and right sides of the dynamic force source loading device are both moved to the right, one end of the screw rod 71 on the left side pushes the shell of the dynamic force source loading device 2.

[0077] The crossbeam 12 is provided with a first threaded hole 121, a plurality of first threaded holes 121 are uniformly and interval distributed in the lateral direction, the shell of the dynamic force source loading device 2 is provided with a first positioning hole 132, and the lateral positioning screw is screw-connected with the first threaded hole 121 and inserted into the first positioning hole 132. By penetrating the lateral positioning screw through different first threaded holes 121, the support plate 13 is locked at the corresponding position of the crossbeam 12, so that the lateral position of the dynamic force source loading device 2 is locked. When it is necessary to change the lateral position of the dynamic force source loading device 2, the lateral positioning screw is taken out, and the screw rod 71 is adjusted by the handles 72 on the left and right sides, so that the lateral position of the shell of the dynamic force source loading device 2 can be continuously adjusted.

[0078] The longitudinal driving device comprises a pull rope and a longitudinal positioning screw, one end of the pull rope is fixedly connected with the crossbeam 12, and two pull ropes are respectively arranged on the front and rear sides of the dynamic force source loading device. The crossbeam 12 is pulled by the pull rope, so that the support plate 15 moves in the longitudinal direction. The guide plate is fixedly arranged on the longitudinal beam 14, and the moving direction of the support plate 15 is prevented from deviating.

[0079] The longitudinal beam 14 is provided with second positioning holes 141, and a plurality of the second positioning holes 141 are uniformly distributed in the longitudinal direction. The support plate 15 is provided with second threaded holes 152, and the longitudinal positioning bolts are screwed with the second threaded holes 152 and inserted into the second positioning holes 141. By passing the longitudinal positioning bolts through different second threaded holes 152, the support plate 15 is locked in the corresponding position of the longitudinal beam 14, so as to lock the longitudinal position of the dynamic force source loading device 2. When it is necessary to change the longitudinal position of the dynamic force source loading device 2, the longitudinal positioning bolts are taken out, and then the front and rear pull ropes are used, so that the longitudinal position of the shell of the dynamic force source loading device 2 can be continuously adjusted.

[0080] Although the specific embodiments of the present application are described above, those skilled in the art should understand that the specific embodiments described are only illustrative, and are not intended to limit the scope of the present application. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present application should be covered within the scope of the claims of the present application.

Claims

1. A non-physical dynamic calibration method for a dynamic truck scale, characterized in that, Includes the following steps: S1. Calibration of the dynamic force source loading device: With the bearing plate firmly against the rigid ground, adjust the input current value of the dynamic force source loading device. I The dynamic force source loading device outputs a loading force value. F Due to the loading force value of the dynamic force source loading device F It is determined by the input current value I The decision is made to obtain the applied force value. F With input current value I Functional relationship between F=f (I) , to functional relationship F=f(I) Stored in the control device; the dynamic force source loading device is a linear motor; S10. Equipment Installation: The non-physical dynamic calibration system is installed on the foundation of the dynamic truck scale. The non-physical dynamic calibration system includes a load-bearing frame, a dynamic force source loading device, a force sensor, a pressure-bearing base plate, and a control device. The housing of the dynamic force source loading device is fixedly connected to the load-bearing frame. The output shaft of the dynamic force source loading device is fixedly connected to the upper side of the force sensor. The pressure-bearing base plate is fixedly connected to the lower side of the force sensor. The control device is connected to the dynamic force source loading device via a cable. The load-bearing frame is fixedly connected to the foundation of the dynamic truck scale. The pressure-bearing base plate is located above the weighing platform of the dynamic truck scale. S11. Pre-loading test: The output shaft of the dynamic force source loading device moves a distance H towards the platform of the dynamic truck scale until the gap between the pressure plate and the platform of the dynamic truck scale is zero. The control device is initialized, and then the dynamic force source loading device applies an appropriate force to the platform of the dynamic truck scale. F 0 This ensures that the pressure-bearing base plate is tightly pressed against the platform of the dynamic truck scale, at which point the force sensor outputs a reference weight. M 0 The dynamic truck scale outputs the detected weight. m 0 Then, the force sensor and the dynamic truck scale are simultaneously zeroed. S20. Setting parameters: The parameters include the loading force value of the dynamic force source loading device. F Loading pulse time t With interval time T The parameters also include the wheelbase between two adjacent axles of the vehicle. L Vehicle speed v The width of the platform of a dynamic truck scale l The loading pulse time t equal l / v The interval time T equal L / v ; The parameters are input into 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 applies a downward force to the platform of the dynamic truck scale; S40. Calibration Test: The dynamic truck scale outputs the measured weight. m Accordingly, the force sensor outputs a reference weight. M Compare the detected weight m With the reference weight M The dynamic weighing error of the dynamic truck scale is obtained. S50. Complete the calibration of the dynamic truck scale.

2. The non-physical dynamic calibration method for a dynamic truck scale according to claim 1, characterized in that, The parameters also include the vehicle's axle configuration. N , N ≥2, the wheelbase between two adjacent axles of the vehicle is specifically as follows: L j ,1≤ j ≤ N -1, N and j All are positive integers, and the specific interval time is... T j , T j =L j / v .

3. The non-physical dynamic calibration method for a dynamic truck scale according to claim 1, characterized in that, The parameters also include the minimum loading force value. F min Maximum loading force value F max With increasing force value F inc The loading force value F At minimum loading force value F min With maximum loading force value F max Select from the smallest to the largest.

4. The non-physical dynamic calibration method for a dynamic truck scale according to claim 1, characterized in that, S40 is followed by S41; S41. Repeatability test: Repeat S30 to S40 multiple times, record the test results, and calculate the repeatability error.

5. The non-physical dynamic calibration method for a dynamic truck scale according to claim 1, characterized in that, S42 is included after S40; S42, Off-center load test: The platform of the dynamic truck scale is divided into multiple loading zones. The pressure-bearing base plate is adjusted in different loading zones. Then proceed to S30. When all loading zones have been tested, proceed to S50.

6. The non-physical dynamic calibration method for a dynamic truck scale according to claim 5, characterized in that, The dynamic force source loading device can move laterally and longitudinally on the load-bearing frame.

7. The non-physical dynamic calibration method for a dynamic truck scale according to claim 6, characterized in that, The non-physical dynamic calibration system also includes a lateral drive mechanism and a longitudinal drive mechanism, both of which are electrically connected to the control device. The load-bearing frame includes columns, crossbeams, support plates, longitudinal beams, and support plates. The longitudinal beams are fixedly connected to the upper ends of the columns, and the lower ends of the columns are fixedly connected to the foundation of the dynamic truck scale. The support plates are slidably connected to the longitudinal beams, the crossbeams are fixedly connected to the support plates, and the support plates are slidably connected to the crossbeams. The housing of the dynamic force source loading device is fixedly connected to the support plates. The lateral drive mechanism controls the sliding state of the support plates, and the longitudinal drive mechanism controls the sliding state of the support plates.

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