CN115420362A - Non-physical dynamic calibration method for dynamic truck scale - Google Patents
Non-physical dynamic calibration method for dynamic truck scale Download PDFInfo
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- CN115420362A CN115420362A CN202210978174.XA CN202210978174A CN115420362A CN 115420362 A CN115420362 A CN 115420362A CN 202210978174 A CN202210978174 A CN 202210978174A CN 115420362 A CN115420362 A CN 115420362A
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Abstract
The invention provides a non-physical dynamic calibration method of a dynamic motor scale, which comprises the following steps: s10, equipment installation: installing a non-physical dynamic calibration system on a dynamic truck scale; s20, setting parameters: the parameters comprise a loading force value F, loading pulse time T and interval time T of the dynamic force source loading device, and 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 bottom plate applies downward acting force to a weighing platform of the dynamic automobile scale; s40, calibration test: outputting a detection weight M by the dynamic truck scale, correspondingly outputting a reference weight M by the force sensor, and comparing the detection weight M with the reference weight M to obtain a dynamic weighing error of the dynamic truck scale; and S50, completing the calibration of the dynamic automobile scale. The invention has the advantages that: the loading condition of the vehicle passing through the dynamic truck scale is simulated, the control device controls the output of the dynamic force source loading device, and the calibration efficiency of the dynamic truck scale is improved.
Description
Technical Field
The invention relates to the technical field of truck scale calibration, in particular to a non-physical dynamic calibration method of a dynamic truck scale.
Background
The dynamic truck scale is an automatic weighing machine which is provided with a load carrier and a guide way, can automatically weigh a running vehicle, determine the total mass and/or axle load of the vehicle and can simultaneously determine the axle group load of the vehicle under certain conditions.
The dynamic verification and calibration of the current dynamic automobile scale are carried out according to verification regulations JJG 907 dynamic road vehicle automatic weighing apparatus, reference vehicles of different coaxial types are adopted to carry out 10 tests within a specified speed range, and the tests are carried out according to the following requirements: 6 times by the center of the carrier (weighing platform); 2 passes by the left side close to the carrier (weighing platform); 2 passes by the right side close to the carrier (scale platform). Dynamic tests should be performed at near maximum weighing Max (must not be less than 80% Max), near minimum weighing Min and usual weighing by properly loading or unloading the reference vehicle so that the total reference vehicle mass and axle load (if necessary) cover the weighing range of the dynamic car balance as much as possible.
The detection method has a plurality of problems: (1) The mass of the reference vehicle can not cover the weighing range of the dynamic automobile scale, and even can not reach the minimum weighing and the maximum weighing of the dynamic automobile scale; (2) The calibration efficiency is low, at least 4 shaft types of vehicles are needed for dynamic calibration, each shaft type is tested for 10 times, the workload is large, and the efficiency is low; (3) The safety is poor, the dynamic calibration needs to be tested on an actual road, the highest speed reaches 80km/h, and safety accidents are easy to happen when emergency situations occur; (4) The verification accuracy is low, and because the vehicle is controlled manually, the consistency of the speed, the acceleration and the loading position in the two driving processes cannot be ensured, so that the repeatability and the reproducibility in the calibration process cannot be ensured. (5) The inaccuracy of the calibration process of the dynamic automobile scale is caused by road factors in the driving process of the automobile, vehicle vibration and other interference factors.
Therefore, it is necessary to develop a non-physical dynamic calibration system for dynamic motor balance. The method for calibrating the dynamic truck scale by adopting the real vehicle is called real object dynamic calibration; calibrating a dynamic truck scale without using real vehicles is referred to as non-physical dynamic calibration.
Disclosure of Invention
The invention aims to provide a non-physical dynamic calibration method of a dynamic truck scale, and improve the calibration efficiency of the dynamic truck scale.
The invention is realized by the following steps: a non-physical dynamic calibration method for dynamic motor scale comprises the following steps:
s10, equipment installation: the non-physical dynamic calibration system is installed on the basis of the dynamic truck scale, the non-physical dynamic calibration system comprises a bearing frame, a dynamic force source loading device, a force sensor, a pressure-bearing bottom plate and a control device, a shell of the dynamic force source loading device is fixedly connected with the bearing frame, an output shaft of the dynamic force source loading device is fixedly connected with the upper side face of the force sensor, the pressure-bearing bottom plate is fixedly connected with the lower side face of the force sensor, the control device is connected with the dynamic force source loading device through a cable, the bearing frame is fixedly connected with the basis of the dynamic truck scale, and the pressure-bearing bottom plate is located above a weighing platform of the dynamic truck scale;
s20, setting parameters: the parameters comprise a loading force value F, loading pulse time T and interval time T of the dynamic force source loading device, and 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 bottom plate applies downward acting force to a weighing platform of the dynamic automobile scale;
s40, calibration test: the dynamic truck scale outputs a detection weight M, the force sensor correspondingly outputs a reference weight M, and the detection weight M is compared with the reference weight M to obtain a dynamic weighing error of the dynamic truck scale;
and S50, completing the calibration of the dynamic automobile scale.
Furthermore, the parameters further comprise the wheel base L of two adjacent shafts of the vehicle, the running speed v of the vehicle and the weighing platform width L of the dynamic automobile scale, the loading pulse time T is equal to L/v, and the interval time T is equal to L/v.
Further, the parameters also comprise the axle type N of the vehicle, wherein N is more than or equal to 2, and the wheel base of two adjacent axles of the vehicle is L j J is more than or equal to 1 and less than or equal to N-1, N and j are positive integers, the interval isTime is specifically T j ，T j ＝L j /v。
Further, the parameters also include a minimum loading force value F min Maximum load force value F max And increasing force value F inc Said load force value F being at a minimum load force value F min With the maximum loading force value F max The selection is carried out from small to large.
Further, before the step S10, a step S1 is further included;
s1, calibrating a dynamic force source loading device: the loading method comprises the steps of enabling the pressure bearing bottom plate to be tightly attached to a rigid ground, adjusting an input current value I of the dynamic force source loading device, enabling the dynamic force source loading device to output a loading force value F, determining the loading force value F of the dynamic force source loading device according to the input current value I, obtaining a functional relation F = F (I) between the loading force value F and the input current value I, and storing the functional relation F = F (I) in the control device.
Further, S11 is also included after S10;
s11, preloading test: an output shaft of the dynamic force source loading device moves towards the weighing platform of the dynamic automobile scale for a section of stroke H until a gap between the pressure bearing bottom plate and the weighing platform of the dynamic automobile scale is zero, the control device is initialized, and then the dynamic force source loading device applies a force value F with a proper magnitude to the weighing platform of the dynamic automobile scale 0 And the pressure-bearing bottom plate is ensured to be tightly pressed and attached with the weighing platform of the dynamic automobile scale, and at the moment, the force sensor outputs the reference weight M 0 The dynamic truck scale outputs a detection weight m 0 And simultaneously resetting the force sensor and the dynamic automobile scale.
Further, S41 is also included after S40;
s41, repeatability test: and repeating S30 to S40 for multiple times, recording the test result, and calculating the repeatability error.
Further, S42 is also included after S40;
s42, unbalance loading test: dividing a weighing platform of the dynamic motor scale into a plurality of loading areas, adjusting the pressure-bearing bottom plate in different loading areas, and turning to S30; when all the load regions are tested, go to S50.
Further, the dynamic force source loading device can move transversely and longitudinally on the bearing frame.
Further, the non-physical dynamic calibration system further comprises a transverse driving mechanism and a longitudinal driving mechanism, wherein the transverse driving mechanism and the longitudinal driving mechanism are both electrically connected with the control device;
the bearing frame comprises a stand 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 stand column, the lower end of the stand column is fixedly connected with the base of the dynamic truck scale, the support plate is connected with the longitudinal beam in a sliding manner, the cross beam is fixedly connected with the support plate, the support plate is connected with the cross beam in a sliding manner, the shell of the dynamic force source loading device is fixedly connected with the support plate, the transverse driving mechanism controls the sliding state of the support plate, and the longitudinal driving mechanism controls the sliding state of the support plate.
The invention has the advantages that: 1. the loading condition of a vehicle passing through the dynamic truck scale is simulated, the control device controls the output of the dynamic force source loading device, the dynamic truck scale outputs a detection weight in the loading process of the dynamic force source loading device, the force sensor correspondingly outputs a reference weight, and the calibration of the dynamic truck scale is realized through data comparison; real vehicles are not needed for calibration, and the calibration efficiency of the dynamic automobile scale is improved. 2. The loading condition of the dynamic force source loading device is conveniently adjusted by changing the input parameters. 3. The repeatability test can be conveniently and efficiently carried out by setting the parameters of the test times in the control device. 4. According to the loading area of the dynamic automobile scale, the transverse and longitudinal positions of the dynamic force source loading device on the rack are adjusted, so that the unbalance loading test is facilitated.
Drawings
The invention will be further described with reference to the following examples and embodiments with reference to the accompanying drawings.
FIG. 1 is a flow chart of the implementation of the non-physical dynamic calibration method of the dynamic vehicle scale of the present invention.
FIG. 2 is a schematic perspective view of a non-physical dynamic calibration system according to the present invention.
FIG. 3 is a schematic perspective view of a non-physical dynamic calibration system according to the present invention.
FIG. 4 is a schematic front view of the non-physical dynamic calibration system of the present invention.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a left side view of fig. 4.
Figure 7 is a schematic illustration of the location of the pressure-bearing backing plate, force sensor, adapter, and scale platform of the present invention.
Fig. 8 is a schematic view showing the positions of the carrier plate and the first rolling bearing in the present invention.
FIG. 9 is a schematic view showing the positions of the cross member, the connecting plate, the support plate and the second rolling bearing according to the present invention.
Fig. 10 is a schematic diagram showing the connection between the control device and the computer according to the present invention.
FIG. 11 is a schematic diagram of a prior art reference vehicle passing a dynamic truck scale.
FIG. 12 is a waveform of an output of a two-axis truck loading condition of a prior art dynamic truck scale.
FIG. 13 is a waveform of an output from a multiaxial vehicle loading condition of a prior art dynamic vehicle scale.
FIG. 14 is a schematic view of the loading area of a prior art dynamic truck scale.
Reference numerals: a force-bearing frame 1; a column 11; a cross beam 12; a first threaded hole 121; a bracket plate 13; a first rolling bearing 131; a first positioning hole 132; a stringer 14; the second positioning hole 141; a support plate 15; a second rolling bearing 151; a second threaded hole 152; a limit beam 16; a dynamic force source loading device 2; an output shaft 21; an adapter 22; a force sensor 3; a pressure-bearing bottom plate 4; a control device 5; a keyboard 51; a computer 6; a display 61; a transverse drive device 7; a screw rod 71; a handle 72; the link plate 73; a screw hole 731; a dynamic truck scale 8; a base 81; a weighing platform 82; the middle 821; the left side 822; the right side 823; a vehicle 9; front axle wheels 91; rear axle wheels 92..
Detailed Description
The embodiment of the invention provides a non-physical dynamic calibration method of a dynamic truck scale, overcomes the defect that a real vehicle is adopted to calibrate the dynamic truck scale in the prior art, and achieves the technical effect of improving the calibration efficiency of the dynamic truck scale.
In order to solve the above disadvantages, the technical solution in the embodiment of the present invention has the following general idea: the loading condition of a vehicle passing through the dynamic truck scale is simulated, a non-physical dynamic calibration system is manufactured, the non-physical dynamic calibration system comprises a force bearing frame, a dynamic force source loading device, a force sensor, a pressure bearing 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, the force sensor correspondingly outputs a reference weight, the dynamic weighing error of the dynamic truck scale is obtained through data comparison, and the calibration of the dynamic truck scale is realized.
Compared with the description in the background art: (1) The loading force value F of the dynamic force source loading device is determined by the input current value I, and the loading force value is the axle load of the simulated vehicle, namely the acting force applied to a weighing platform when the wheel of the running vehicle is on the weighing platform of the dynamic automobile scale; the control device adjusts the input current value I so as to adjust the loading force value F, thereby effectively covering the weighing range of the dynamic automobile scale. (2) Parameters are input through a keyboard, the loading condition of the dynamic force source loading device is conveniently adjusted, and the loading condition of different coaxial vehicles in the dynamic truck scale can be simulated. (3) Because real vehicles are not adopted, the dynamic calibration does not need to be tested on an actual road, and the occurrence of safety accidents is greatly reduced. (4) The loading state and the loading position of the dynamic force source loading device are accurately adjusted, parameter deviation caused by manual vehicle control is avoided, and repeatability and reproducibility in a calibration process are guaranteed. (5) The interference factors such as vehicle vibration and the like in the running process of the vehicle on the road surface are avoided, and the accuracy of the dynamic vehicle 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 automobile scale is improved.
In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.
Referring to fig. 1 to 14, a preferred embodiment of the present invention.
In the prior art, when a real reference vehicle is used to calibrate the dynamic vehicle scale, a schematic diagram is shown in fig. 11, where L is the wheel base of two adjacent axles of the vehicle, where the wheel base of two adjacent axles is the horizontal distance between the central axle of the front wheel and the central axle of the rear wheel of the vehicle in the diagram; l is the platform width of the dynamic truck scale, fig. 12 is a waveform diagram of the output when the two-axle vehicle passes through the dynamic truck scale: the first row of waveforms is the waveform output by the front axle wheel of the vehicle on the weighing platform of the dynamic automobile scale, the second row of waveforms is the waveform output by the rear axle wheel of the vehicle on the weighing platform, wherein t 1.1 Time of weighing platform on wheel, t 1.2 The time for which the wheel is completely resting on the weighing platform, t 1.3 For the time of weighing the wheel down, the pulse time t is loaded 1 ＝t 1.1 +t 1.2 +t 1.3 ，t 1.1 And t 1.3 The time of (2) is extremely short; corresponding t 2 ＝t 2.1 +t 2.2 +t 2.3 ，t 1 ＝t 2 And (d) = l/v. The time T is the time interval of the front axle wheel and the rear axle wheel of the vehicle entering the weighing platform, T = L/v, and v is the running speed of the vehicle. The dynamic truck scale processes t through an internal self-contained dynamic processing algorithm 1 The time waveform data obtains the axle weight m exerted by the front axle wheel 1 Processing t 2 The waveform data of the time of day yields the axle weight m exerted by the rear axle wheels 2 Then, m is put 1 And m 2 Adding the weight m to obtain the total vehicle weight m; normally, the axle weight m exerted by the front axle wheels when the center of gravity of the vehicle is not in the neutral position 1 Axle weight m applied to rear axle wheels 2 Are not the same. And comparing the weights of the front axle, the rear axle and the whole vehicle when the vehicle is in a static state, namely the dynamic weighing error. Reference herein to the static state of the vehicle is the state in which the vehicle is stationary resting 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 of the invention is consistent with the loading mode of the reference vehicle, the loading output of the dynamic force source loading device of the invention is the loading waveform when the analog reference vehicle calibrates the dynamic automobile balance, as shown in fig. 13, the loading waveform schematic diagram of the multi-axle vehicle (2-axle, 3-axle, 4-axle, 5-axle and 6-axle).
The invention relates to a non-physical dynamic calibration method of a dynamic motor scale, which comprises the following steps:
s1, calibrating a dynamic force source loading device: the pressure-bearing bottom plate 4 is tightly attached to a rigid ground, such as a concrete ground, a rock ground and the like; and adjusting the input current value I of the dynamic force source loading device 2, wherein the dynamic force source loading device 2 outputs a loading force value F, and correspondingly, the reference weight M output by the force sensor 3 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, a 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) is stored in the control device 5. For example, when I =10A, F =50kN; that is, when the input current of the dynamic force source loading unit 2 is set to 10A, the output loading force value of the output shaft 21 of the dynamic force source loading unit 2 is 50kN, that is, the reference weight output by the force sensor 3 is also 50kN. Thus, as long as the parameter of the required loading force value is input to the control device 5, the control device 5 automatically adjusts the input current value of the dynamic power loading device 2 according to the functional relationship, so that the dynamic power loading device 2 outputs the required loading force value.
S10, equipment installation: installing a non-physical dynamic calibration system on the basis of a dynamic truck scale, wherein the basis is also called as a base; the non-physical dynamic calibration system comprises a bearing frame 1, a dynamic force source loading device 2, a force sensor 3, a pressure bearing bottom plate 4 and a control device 5; the shell of the dynamic force source loading device 2 is fixedly connected with the force bearing frame 1, the output shaft 21 of the dynamic force source loading device 2 is fixedly connected with the upper side surface of the force sensor 3, the pressure bearing bottom plate 4 is fixedly connected with the lower side surface of the force sensor 3, the control device 5 is connected with the dynamic force source loading device 2 through a cable, the force bearing frame 1 is fixedly connected with the foundation 81 of the dynamic truck scale 8, and the pressure bearing bottom plate 4 is positioned above the weighing platform 82 of the dynamic truck scale 8; for the case that a certain stroke H exists between the pressure-bearing base plate 4 and the weighing platform 82, a preloading test needs to be performed.
S11, preloading test: the output shaft 21 of the dynamic force source loading device 2 moves towards the weighing platform 82 of the dynamic vehicle scale 8 by a stroke H, as shown in fig. 6, until the gap between the pressure-bearing bottom plate 4 and the weighing platform 82 of the dynamic vehicle scale 8 is zero, the control device 5 is initialized, and then the dynamic force source loading device 2 applies a force value F with a proper magnitude to the weighing platform 82 of the dynamic vehicle scale 8 0 To ensure the pressure-bearing bottom plate 4 and the weighing platform 82 of the dynamic automobile scale 8 to be pressed and attached, and at this moment, the force sensor 3 outputs the reference weight M 0 The dynamic truck scale 8 outputs the detected weight m 0 And simultaneously clearing the force sensor 3 and the dynamic automobile scale 8. The preloading test is to ensure that the output end of the dynamic force source loading device 2, namely the pressure-bearing bottom plate 4, is in gapless contact with the weighing platform 82 of the dynamic automobile scale 8, and prevent the impact effect generated by idle stroke in the loading process.
S20, setting parameters: the parameters comprise a loading force value F, a loading pulse time T and an interval time T of the dynamic force source loading device 2, and are input into the control device 5.
The parameters also comprise the wheel base L of two adjacent shafts of the vehicle, the running speed v of the vehicle and the weighing platform width L of the dynamic automobile scale, 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 wheel of the vehicle 9 runs on the weighing platform 82 of the dynamic truck scale 8. The interval time T is a 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 do not enter the weighing platform 82 of the dynamic truck scale 8. According to the condition of the vehicle 9 to be simulated, the wheel base L of two adjacent shafts of the vehicle 9 can be measured; the width of the weighing platform 82 of the dynamic automobile scale 8 can be directly measured; according to the calibration requirements, the driving speed v and the loading force value F of the vehicle 9 are set. For a two-axle type vehicle, there is only one vehicle with the wheelbase L of two adjacent axles.
The parameters also comprise the axle type N of the vehicle, wherein N is more than or equal to 2, and the phase of the vehicleThe distance between two adjacent shafts is L j J is more than or equal to 1 and less than or equal to N-1, N and j are positive integers, and the interval time is T j ，T j ＝L j And/v. For vehicles of more than three-axle type, there are accordingly wheelbases of two adjacent axles of more than two vehicles. For example, a three-axle type vehicle: n =3, and the wheel base of two adjacent axles of the vehicle is L 1 、L 2 (ii) a Interval time of T 1 And T 2 . Four-axle type vehicle: n =4, and the wheel base of two adjacent axles of the vehicle is L 1 、L 2 、L 3 (ii) a Interval time of T 1 、T 2 、T 3 . Thus, the non-physical dynamic calibration system of the dynamic truck scale 8 of the invention can simulate vehicles with various axle types to calibrate the dynamic truck scale 8.
The parameters also include a minimum load force value F min Maximum load force value F max And increasing force value F inc Said loading force value F being at a minimum loading force value F min With the maximum loading force value F max The selection is performed from small to large in sequence. Minimum load force value F min Is the minimum weighing and the maximum loading force value F of the dynamic truck scale 8 max Is the maximum weighing of the dynamic truck scale. Therefore, dynamic loading covering the weighing range of the dynamic truck scale is realized.
S30, loading test: the control device 5 controls the dynamic force source loading device 2 according to the parameters, so that the pressure bearing bottom plate 4 applies downward acting force to the weighing platform 82 of the dynamic motor truck scale 8; the wheels of the vehicle 9 are driven into the weighing platform 82 of the dynamic automobile scale 8, and the loading force value is output corresponding to the dynamic force source loading device 2, so that the pressure bearing bottom plate 4 applies downward acting force to the weighing platform 82 of the dynamic automobile scale 8; the wheel of the vehicle 9 leaves the weighing platform 82 of the dynamic automobile balance 8, and the output loading force value is cancelled corresponding to the dynamic force source loading device 2.
S40, calibration test: the dynamic truck scale 8 outputs a detection weight M, correspondingly the force sensor 3 outputs a reference weight M, and the detection weight M is compared with the reference weight M to obtain a dynamic weighing error of the dynamic truck scale 8; the reference weight M output by the force sensor 3 is in accordance with the loading force value F of the set parameter. For simulating the conditions of two-axle vehiclesAfter inputting the parameters of the two-axle vehicle, the dynamic truck scale 8 outputs the detected weight m corresponding to the front axle wheel 91 through the loading test 1 Detected weight m corresponding to rear axle wheel 92 2 ，m 1 +m 2 Namely the whole weight of the two-axle vehicle. The reference weight M corresponding to the front axle wheel 91 output from the contrast force sensor 3 1 Reference weight M corresponding to rear axle wheel 92 2 Vehicle weight M 1 +M 2 . The dynamic weighing error of the dynamic truck scale 8 of the two-axle vehicle 9 at a certain speed is obtained, and the weighing error of the dynamic truck scale 8 at different axle types and different speeds is obtained by testing after changing axle type data and speed data.
S41, repeatability test: and repeating S30 to S40 for multiple times, recording the test result, and calculating the repeatability error. I.e. to simulate a real vehicle 9 driving multiple times over the weighing platform 82 of the dynamic truck scale 8. Due to the fact that the real vehicle 9 is eliminated, the control device is provided with parameters of testing times, and the non-physical dynamic calibration system of the dynamic motor scale 8 is adopted to conveniently and efficiently conduct repeatability testing.
S42, unbalance loading test: the weighing platform 82 of the dynamic truck scale 8 is divided into a plurality of loading areas, the pressure-bearing bottom plate 4 is adjusted to be in different loading areas, and the process goes to S30; when all the load regions are tested, go to S50. The scale platform 82 is divided into three loading regions, center 821, left 822, right 823. The simulated real vehicle 9 travels from the middle 821, left 822, right 823 of the scale platform 82. The positions of the dynamic force source loading device 2 and the pressure bearing base plate 4 are adjusted to the middle 821, the left side 822 and the right side 823 of the weighing platform 82. The position of the dynamic force source loading device 2 on the frame is adjusted by the transverse driving device 7 and the longitudinal driving device.
And S50, completing the calibration of the dynamic automobile scale.
The dynamic force source loading device can move transversely and longitudinally on the bearing frame.
The non-physical dynamic calibration system also comprises a transverse driving mechanism and a longitudinal driving mechanism, and the transverse driving mechanism and the longitudinal driving mechanism are both electrically connected with the control device; the transverse driving device 7 and the longitudinal driving device can adopt other existing driving devices. The control device controls the working states of the transverse driving device and the longitudinal driving device.
The bearing frame 1 comprises an upright post 11, a cross beam 12, a support plate 13, a longitudinal beam 14 and a support plate 15, wherein the longitudinal beam 14 is fixedly connected with the upper end of the upright post 11, the support plate 15 is slidably connected with the longitudinal beam 14, the cross beam 12 is fixedly connected with the support plate 15, the support plate 13 is slidably connected with the cross beam 12, and a 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 that the unbalance loading test is facilitated. The dynamic vehicle scale 8 typically has two scales 82 corresponding to the left and right wheels of the vehicle 9 in the same row. The position of the dynamic force source loading device 2 is adjusted, and the two weighing platforms 82 are calibrated in sequence. 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.
The frame 1 further comprises a first rolling bearing 131, the support plate 13 is provided with a first cylindrical shaft, the first cylindrical shaft is fixedly connected with an inner ring of the first rolling bearing 131, and an outer ring of the first rolling bearing 131 is arranged on the upper surface of the cross beam 12; the movement of the bracket plate 13 on the cross beam 12 is rolling friction.
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 an inner ring of the second rolling bearing 151, and an 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.
The frame 1 further comprises limiting beams 16, and the two limiting beams 16 are fixedly arranged at the front end and the rear end of the longitudinal beam 14 respectively to ensure the structural rigidity of the longitudinal beam 14; the stopper beam 16 defines the longitudinal movement range of the support plate 15. The two longitudinal beams 14 define the lateral movement range of the bracket plate 13. Guide plates are installed along the longitudinal direction of the longitudinal beams 14, and prevent the support plates 15 from being positionally displaced when they are longitudinally moved.
The upright column 11 is formed by arranging a plurality of stud bolts along two sides of the weighing platform 82, one end of the upright column 11 is connected with the foundation 81 of the dynamic motor truck scale 8 through bolts, and the foundation 81 of the dynamic motor truck scale 8 is implanted into corresponding threaded holes by high-strength chemical adhesive glue. The longitudinal beam 14 at the other end of the upright post 11 is fixedly connected through a plurality of threads, and the number of the threaded connections is selected according to actual needs on site.
In the calibration process, the bearing frame 1 plays a supporting role, and the bearing bottom plate 4 is positioned above the weighing platform 82 of the dynamic automobile scale 8; the control device 5 controls the output of the dynamic force source loading device 2, the output shaft 21 of the dynamic force source loading device 2 moves downwards, when the pressure-bearing bottom plate 4 is tightly attached to the weighing platform 82 and exerts an acting force downwards, namely, the situation that the wheels of the vehicle 9 run on the weighing platform 82 of the dynamic automobile scale 8 is simulated, at the moment, the dynamic automobile scale 8 outputs a detection weight, the force sensor 3 outputs a reference weight, and the reference weight detects the 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 automobile balance 8 does not output the detection weight, and the force sensor 3 does not output the reference weight, namely, the condition that the wheel of the vehicle 9 leaves the weighing platform 82 of the dynamic automobile balance 8 is simulated. And obtaining the dynamic weighing error of the dynamic truck scale 8 by comparing the detection weight with the reference weight, and realizing the calibration of the dynamic truck scale 8.
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 non-physical dynamic calibration system further comprises a keyboard 51, and the keyboard 51 is electrically connected with the control device 5. The parameters are input through the keyboard 51, and the loading condition of the dynamic force source loading device 2 is conveniently adjusted. The parameters comprise the axle type N of the vehicle, the axle distance L of two adjacent axles of the vehicle, the running speed v of the vehicle, the width L of the weighing platform, the value-added force value F, the pulse loading time T and the interval time T.
The non-physical dynamic calibration system further comprises a computer 6, a dynamic truck scale 8 and a display 61, wherein 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 vehicle scale 8 and the data of the parameter weight output by the force sensor 3, then visually displays the data on the display 61 and displays the dynamic weighing error of the dynamic vehicle scale 8.
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 a bolt in a locking mode. The force sensor 3 and the pressure-bearing bottom plate 4 are also connected through bolt locking. When the force sensor 3 breaks down, it is convenient to replace the force sensor 3.
In the non-physical dynamic calibration system, the transverse driving device and the longitudinal driving device can be operated manually, and the transverse driving device and the longitudinal driving device are not electrically connected with the control device. The transverse driving device 7 comprises a screw rod 71, a handle 72, a connecting plate 73 and a transverse positioning bolt, the connecting plate 73 is fixedly connected with the cross beam 12, the connecting plate 73 is provided with a screw hole 731, the screw rod 71 is screwed with the screw hole 731, one end of the screw rod 71 can prop 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 the two screw rods 71, the handle 72 and the connecting plate 73 are respectively arranged in the left and right side directions of the dynamic force source loading device; when the screw rods 71 positioned at the left and right sides of the dynamic force source loading device move leftwards, one end of the screw rod 71 at the right side pushes the shell of the dynamic force source loading device 2; when the lead screws 71 located in the left and right directions of the dynamic force source loading device are all moved rightward, one end of the lead screw 71 in the left direction pushes the housing of the dynamic force source loading device 2.
The cross beam 12 is provided with a first threaded hole 121, a plurality of first threaded holes 121 are distributed at intervals in the transverse direction, a housing of the dynamic force source loading device 2 is provided with a first positioning hole 132, and the transverse positioning bolt is screwed with the first threaded hole 121 and inserted into the first positioning hole 132. By passing the transverse positioning bolt through the different first threaded holes 121, the bracket plate 13 is locked in the corresponding position of the cross beam 12, and thus the transverse position of the dynamic force source loading device 2 is locked. When the transverse position of the dynamic force source loading device 2 needs to be changed, the transverse positioning bolt is taken out, and the screw rod 71 is adjusted by the handles 72 at the left side and the right side, so that the transverse position of the shell of the dynamic force source loading device 2 can be continuously adjusted.
The longitudinal driving device comprises pull ropes and a longitudinal positioning bolt, one end of each pull rope is fixedly connected with the cross beam 12, and the two pull ropes are respectively arranged in the front side direction and the rear side direction of the dynamic force source loading device; the cross member 12 is pulled by the pulling rope so that the support plate 15 is moved in the longitudinal direction. Guide plates are fixedly provided on the longitudinal beams 14 to prevent the moving direction of the support plate 15 from deviating.
The longitudinal beam 14 is provided with a second positioning hole 141, a plurality of the second positioning holes 141 are uniformly distributed at intervals in the longitudinal direction, the support plate 15 is provided with a second threaded hole 152, and the longitudinal positioning bolt is screwed with the second threaded hole 152 and inserted into the second positioning hole 141. By passing the longitudinal positioning bolt through the second, different threaded hole 152, the support plate 15 is locked in a corresponding position to the longitudinal beam 14, thereby locking the longitudinal position of the dynamic force source loading unit 2. When the longitudinal position of the dynamic force source loading device 2 needs to be changed, the longitudinal positioning bolt is taken out, and the pull ropes at the front side and the rear side are used, so that the longitudinal position of the shell of the dynamic force source loading device 2 can be continuously adjusted.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (10)
1. A non-physical dynamic calibration method for a dynamic truck scale is characterized by comprising the following steps: s10, equipment installation: the method comprises the following steps that a non-physical dynamic calibration system is installed on the basis of 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 bearing bottom plate and a control device, a shell of the dynamic force source loading device is fixedly connected with the bearing frame, an output shaft of the dynamic force source loading device is fixedly connected with the upper side face of the force sensor, the pressure bearing bottom plate is fixedly connected with the lower side face of the force sensor, the control device is connected with the dynamic force source loading device through a cable, the bearing frame is fixedly connected with the basis of the dynamic truck scale, and the pressure bearing bottom plate is located above a weighing platform of the dynamic truck scale; s20, setting parameters: the parameters comprise a loading force value F, loading pulse time T and interval time T of the dynamic force source loading device, and 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 bottom plate exerts downward acting force on a weighing platform of the dynamic automobile scale; s40, calibration test: the dynamic truck scale outputs a detection weight M, the force sensor correspondingly outputs a reference weight M, and the detection weight M is compared with the reference weight M to obtain a dynamic weighing error of the dynamic truck scale; and S50, completing the calibration of the dynamic automobile scale.
2. The method according to claim 1, wherein the parameters further include an axle distance L between two adjacent axles of the vehicle, a driving speed v of the vehicle, and a platform width L of the dynamic car scale, the loading pulse time T is equal to L/v, and the interval time T is equal to L/v.
3. The method for non-physical dynamic calibration of a dynamic vehicle scale according to claim 2, wherein the parameters further include a vehicle axle type N, N is greater than or equal to 2, and an axle distance between two adjacent axles of the vehicle is specifically L j J is more than or equal to 1 and less than or equal to N-1, N and j are positive integers, and the interval time is T j ，T j ＝L j /v。
4. The method of claim 1, wherein the parameters further comprise a minimum loading force value F min Maximum load force value F max And increasing force value F inc Said load force value F being at a minimum load force value F min With the maximum loading force value F max The selection is carried out from small to large.
5. The method according to claim 1, further comprising, before S10, S1;
s1, calibrating a dynamic force source loading device: the loading method comprises the steps of enabling the pressure bearing bottom plate to be tightly attached to a rigid ground, adjusting an input current value I of the dynamic force source loading device, enabling the dynamic force source loading device to output a loading force value F, determining the loading force value F of the dynamic force source loading device according to the input current value I, obtaining a functional relation F = F (I) between the loading force value F and the input current value I, and storing the functional relation F = F (I) in the control device.
6. The method according to claim 1, further comprising, after the step S10, a step S11;
s11, preloading test: the output shaft of the dynamic force source loading device moves a section of stroke H towards the weighing platform direction of the dynamic automobile scale until the gap between the pressure bearing bottom plate and the weighing platform of the dynamic automobile scale is zero, the control device is initialized, and then the dynamic force source loading device applies a force value F with proper magnitude to the weighing platform of the dynamic automobile scale 0 And the pressure-bearing bottom plate is ensured to be tightly pressed and attached with the weighing platform of the dynamic automobile scale, and at the moment, the force sensor outputs the reference weight M 0 The dynamic truck scale outputs a detection weight m 0 Simultaneously aligning the force sensor and the dynamic truck scaleAnd clearing.
7. The method according to claim 1, further comprising S41 after S40;
s41, repeatability test: and repeating S30 to S40 for multiple times, recording the test result, and calculating the repeatability error.
8. The method according to claim 1, further comprising S42 after S40;
s42, unbalance loading test: dividing a weighing platform of the dynamic motor scale into a plurality of loading areas, adjusting the pressure-bearing bottom plate in different loading areas, and turning to S30; when all the load regions are tested, go to S50.
9. The method of claim 8, wherein the dynamic force source loading device can move transversely and longitudinally on the force bearing frame.
10. The method according to claim 9, wherein the system further comprises a transverse driving mechanism and a longitudinal driving mechanism, and both the transverse driving mechanism and the longitudinal driving mechanism are electrically connected to the control device;
the bearing frame comprises a stand column, a cross beam, a support plate, a longitudinal beam and a support plate, wherein the longitudinal beam is fixedly connected with the upper end of the stand column, the lower end of the stand column is fixedly connected with the base of the dynamic truck scale, the support plate is slidably connected with the longitudinal beam, the cross beam is fixedly connected with the support plate, the support plate is slidably connected with the cross beam, a shell of the dynamic force source loading device is fixedly connected with the support plate, a transverse driving mechanism controls the sliding state of the support plate, and a longitudinal driving mechanism controls the sliding state of the support plate.
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| CN202210978174.XA CN115420362A (en) | 2022-08-16 | 2022-08-16 | Non-physical dynamic calibration method for dynamic truck scale |
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| CN202210978174.XA CN115420362A (en) | 2022-08-16 | 2022-08-16 | Non-physical dynamic calibration method for dynamic truck scale |
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