CN115420363A - Static and dynamic calibration system of dynamic road weighing equipment - Google Patents
Static and dynamic calibration system of dynamic road weighing equipment Download PDFInfo
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- CN115420363A CN115420363A CN202210978205.1A CN202210978205A CN115420363A CN 115420363 A CN115420363 A CN 115420363A CN 202210978205 A CN202210978205 A CN 202210978205A CN 115420363 A CN115420363 A CN 115420363A
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- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a static and dynamic calibration system of a dynamic weighing device of a road, which comprises: the two ends of the cross beam are respectively fixedly connected with the two portal frames, the cylinder body of the servo electric cylinder is fixedly connected with the cross beam, the output shaft of the servo electric cylinder 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 electrically connected with the servo electric cylinder, and the static parameter memory, the dynamic parameter memory and the static and dynamic mode change-over switch are electrically connected with the control device. The invention has the advantages that: the road dynamic weighing device can replace the situation that weights are adopted to carry out static calibration on the road dynamic weighing device and standard reference vehicles are adopted to carry out dynamic loading on the road dynamic weighing device, the control device controls the servo electric cylinder to carry out static and dynamic loading output according to parameters, the servo electric cylinder outputs the detected weight during the loading process, the force sensor correspondingly outputs the reference weight, and the calibration efficiency of the road dynamic weighing device is improved.
Description
Technical Field
The invention relates to the technical field of dynamic weighing equipment for roads, in particular to a static and dynamic calibration system of the dynamic weighing equipment for roads.
Background
The road dynamic weighing equipment is an automatic weighing apparatus with a load carrier (also called weighing platform) and a guide way, and can automatically weigh running vehicles, determine the total mass and/or axle load of the vehicles and simultaneously determine the axle group load of the vehicles under certain conditions. The system is mainly used for traffic axle load investigation, overrun overload transportation and weight-calculating charging.
The measurement performance indexes of the current road dynamic weighing equipment comprise static measurement performance and dynamic measurement performance, and the calibration is carried out according to a calibration regulation JJJG 907 dynamic road vehicle automatic weighing apparatus. Static performance adopts weight or weight to replace and calibrates, but adopts the weight calibration to have weight transportation difficulty, and calibration inefficiency, the security is poor to and the loader does not have sufficient space to place weight scheduling problem, lead to the static calibration of dynamic truck scale to have examined not, examined inaccurate problem. If static verification is not carried out or verification is not accurate, the accuracy and stability of dynamic weighing of the dynamic weighing equipment are seriously influenced.
The dynamic metering performance is tested 10 times in a specified speed range by using reference vehicles of different coaxial types, and the dynamic metering performance is carried out according to the following requirements: 6 passes by the centre of the carrier; 2 passes by the left side near the carrier; 2 passes by the right side near the carrier. 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. This method also has a number of problems: (1) The mass of the reference vehicle cannot cover the weighing range of the dynamic automobile scale, and even cannot reach the minimum weighing and the maximum weighing; (2) The verification efficiency is low, at least 4 axle type vehicles are needed for dynamic verification, each axle type is tested for 10 times, the workload is large, and the efficiency is low; (3) The safety is poor, the dynamic verification 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 of the measuring process cannot be ensured. (5) The measurement process is inaccurate due to road factors and vehicle vibration and other interference factors in the running process of the vehicle. (6) The mass of the reference vehicle is determined by the separated control weighing apparatus, and the mass of the standard vehicle changes due to uncontrollable factors such as rainfall, sundries, oil consumption and the like during the transportation of the standard vehicle from the separated control weighing apparatus to the measured weighing apparatus, so that the accuracy of verification is greatly influenced.
Therefore, the performance calibration of the conventional road dynamic weighing equipment has the problems that the accuracy cannot be ensured, the implementation difficulty in the calibration process is high, the operability is poor, the safety is poor, the calibration efficiency is low and the like. It is very necessary to develop a system that can not only meet the static performance calibration but also calibrate the dynamic performance index.
Disclosure of Invention
The invention aims to provide a static and dynamic calibration system of dynamic weighing equipment of a highway, which improves the calibration efficiency of the dynamic weighing equipment of the highway.
The invention is realized by the following steps: a static and dynamic calibration system for a dynamic road weighing device comprising:
the device comprises a portal frame, a cross beam, a servo electric cylinder, a force sensor, a pressure-bearing bottom plate, a control device, a static parameter memory, a dynamic parameter memory and a static and dynamic mode change-over switch;
the both ends of crossbeam respectively with two portal frame fixed connection, the cylinder body of servo electronic jar with crossbeam fixed connection, the output shaft of servo electronic jar with side fixed connection on force sensor, the pressure-bearing bottom plate with force sensor's downside fixed connection, controlling means with servo electronic jar electricity is connected, static parameter memory, dynamic parameter memory, static and dynamic mode change over switch all with controlling means electricity is connected.
Further, the intelligent control system also comprises a keyboard which is electrically connected with the control device.
The road dynamic weighing system is characterized by further comprising a computer, road dynamic weighing equipment and a display, wherein the force sensor and the road dynamic weighing equipment are electrically connected with the computer, and the computer is also electrically connected with the display.
Further, still include guide rail and slider, the guide rail with the downside fixed connection of crossbeam, servo electronic jar the cylinder body with slider fixed connection, the slider with guide rail sliding connection.
Furthermore, the portal frame comprises bearing columns and longitudinal beams, the two ends of each longitudinal beam are respectively fixedly connected with the upper ends of the two bearing columns, the cross beam is in sliding connection with the longitudinal beams, the lower ends of the bearing columns are fixedly connected with the base of the dynamic road weighing equipment, and the bearing bottom plate is located above the weighing platform of the dynamic road weighing equipment.
Further, the device also comprises a transverse driving device and a longitudinal driving device, wherein the transverse driving device controls the sliding state of the sliding block, and the longitudinal driving device controls the sliding state of the cross beam.
Furthermore, servo electronic jar, force transducer, pressure-bearing bottom plate all have two, the weighing platform of highway dynamic weighing equipment has two.
Further, still include static mode pilot lamp and dynamic mode pilot lamp, static mode pilot lamp and dynamic mode pilot lamp all are connected with controlling means electricity.
The invention has the advantages that: 1. the dynamic road weighing device can be used for replacing static calibration of the dynamic road weighing device by adopting weights and dynamic loading of the dynamic road weighing device by adopting a standard reference vehicle, the control device controls the servo electric cylinder to perform static loading output according to static parameters and controls the servo electric cylinder to perform dynamic loading output according to dynamic parameters, the static and dynamic mode switch is used for switching the static and dynamic loading state of the servo electric cylinder, the dynamic road weighing device outputs detection weight in the loading process of the servo electric cylinder, the force sensor correspondingly outputs reference weight, and static and dynamic calibration of the dynamic road weighing device is realized by comparing the reference weight with the detection weight, namely calibration error; the calibration does not need to use real weights and vehicles, and the calibration efficiency of the dynamic weighing equipment for the road is improved. 2. Parameters are input through a keyboard, and the loading condition of the servo electric cylinder is conveniently adjusted. 3. The display visually displays the calibration condition of the road dynamic weighing equipment. 4. The horizontal and longitudinal positions of the servo electric cylinder are adjusted according to the loading area of the dynamic truck scale, so that the unbalance loading test is facilitated.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the static and dynamic calibration system of the dynamic road weighing apparatus of the present invention.
Fig. 2 is a schematic position diagram of a cross beam, a servo electric cylinder, a force sensor and a pressure-bearing bottom plate in the invention.
Figure 3 is a schematic view of the location of the pressure-bearing baseplate, force sensor, adapter and scale platform of the present invention.
Fig. 4 is a schematic diagram of the connection between the control device and the computer according to the present invention.
FIG. 5 is a schematic view of a prior art weight on a road dynamic weighing apparatus.
FIG. 6 is a waveform of the output of a prior art weight loading condition of a road dynamic weighing apparatus.
FIG. 7 is a schematic representation of a prior art reference vehicle passing through a dynamic truck scale.
FIG. 8 is a waveform of an output from a two-axis truck loading condition of a prior art on-highway dynamic weighing apparatus.
FIG. 9 is a waveform of the output of a multi-axle truck load condition of a prior art highway dynamic weighing apparatus.
FIG. 10 is a schematic view of the loading area of a prior art road dynamic weighing apparatus.
Reference numerals: a portal frame 1; a cross beam 11; a bearing upright column 12; a longitudinal beam 13; a guide rail 14; a slider 15; a servo electric cylinder 2; an output shaft 21; an adapter 22; a force sensor 3; a pressure-bearing bottom plate 4; a control device 5; a static parameter memory 51; a dynamic parameter memory 52; a keyboard 53; a function memory 54; a static mode indicator lamp 55; a dynamic mode indicator light 56; a static-dynamic mode changeover switch 6; a computer 7; a display 71; a road dynamic weighing device 8; a base 81; a weighing platform 82; the middle 821; the left side 822; the right side 823; a weight 9; a vehicle 10; front axle wheels 101; rear axle wheels 102.
Detailed Description
The embodiment of the invention provides a static and dynamic calibration system of dynamic weighing equipment for a road, overcomes the defects that the dynamic weighing equipment for the road is statically calibrated by weights and dynamically calibrated by real vehicles in the prior art, and realizes the technical effect of improving the calibration efficiency of the dynamic weighing equipment for the road.
In order to solve the above disadvantages, the technical solution in the embodiment of the present invention has the following general idea: the static and dynamic calibration system can be manufactured by replacing the conditions of statically calibrating the dynamic road weighing equipment by adopting weights and dynamically loading the dynamic road weighing equipment by adopting a standard reference vehicle, and comprises a portal frame, a cross beam, an electric servo cylinder, a force sensor, a pressure bearing bottom plate, a control device, a static parameter memory, a dynamic parameter memory and a static and dynamic mode change-over switch, wherein the control device controls the electric servo cylinder to perform static loading output according to static parameters, controls the electric servo cylinder to perform dynamic loading output according to dynamic parameters, the static and dynamic mode change-over switch is used for changing over the static and dynamic loading state of the electric servo cylinder, the electric servo cylinder outputs the detected weight during the loading process, correspondingly, the force sensor outputs the reference weight, and the static and dynamic calibration of the dynamic road weighing equipment is realized by comparing the reference weight with the detected weight, namely, a calibration error.
Compared with the description in the background art: for static calibration, the loading force value F of the servo electric cylinder is determined by the input current value I, and the loading force value is the condition that when a simulation weight is placed on a weighing platform of the road dynamic weighing equipment, the weight exerts the acting force on the weighing platform, so that the difficulty in weight transportation in calibration with the weight is avoided, the calibration efficiency is low, the safety is poor, and the weight is not placed in a sufficient space of a loader. For dynamic calibration, (1) the loading force value can also simulate the axle load of the 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 road dynamic weighing equipment. (2) The loading condition of the dynamic force source loading device is conveniently adjusted by inputting parameters through a keyboard, and the loading condition of different types of vehicles on the dynamic road weighing equipment 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 servo electric cylinder are accurately adjusted, parameter deviation occurring when vehicles are controlled manually 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 calibration process of the dynamic weighing equipment for the road is improved. (6) The calibration of the road dynamic weighing equipment is realized through data comparison; real vehicles are not needed, the calibration efficiency of the dynamic truck scale is improved, and the calibration accuracy is improved.
For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the embodiments.
Referring to fig. 1 to 10, a preferred embodiment of the present invention.
In the prior art, as shown in fig. 7, a weight 9 is used to calibrate a dynamic road weighing device 8, and the detected weight output by the dynamic road weighing device 8 is compared with the placed weight 9; when the weight is increased, the detected weight output by the dynamic weighing equipment of the highway is increased, and when the weight is reduced, the detected weight output by the dynamic weighing equipment of the highway is reduced. The weights are placed on the weighing platform of the road dynamic weighing device in sequence, and a waveform chart of the detected weight output by the road dynamic weighing device 8 and the placing time of the weights is shown in fig. 6. In order to ensure that the loading mode of the servo electric cylinder is consistent with that of the weight, the loading output of the servo electric cylinder is a loading waveform when the weight is simulated to calibrate the road dynamic weighing equipment.
In the prior art, when a real reference vehicle 10 is used to calibrate a road dynamic weighing apparatus 8, the schematic is shown in fig. 7, where L is the wheel base of two adjacent axles of the vehicle, where the wheel base of two adjacent axles is the center axle of the front wheel of the vehicle in the figureA horizontal spacing from a rear wheel center axis; l is the weighing platform width of the dynamic road weighing system, fig. 8 is a waveform diagram output by a two-axle vehicle passing through the dynamic road weighing system: the first row of waveforms is the waveform output by the front axle wheel of the vehicle on the weighing platform of the road dynamic weighing system, 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 road weighing system processes t through an internal self-contained dynamic processing algorithm 1 The time waveform data is used for obtaining the axle weight m exerted by the front axle wheel 1 Processing t 2 The waveform data of the time of day gives the axle weight m applied to 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 in the static state of the reference vehicle, namely the dynamic weighing error. Reference herein to the static state of the vehicle is to the state in which the vehicle is stationary resting on the weighing platform of the road dynamic weighing apparatus. In order to ensure that the loading mode of the servo electric cylinder is consistent with that of the reference vehicle, the loading output of the servo electric cylinder is a loading waveform when the reference vehicle is simulated to calibrate the road dynamic weighing equipment, as shown in fig. 9, a loading waveform schematic diagram of a multi-axle vehicle (2-axle, 3-axle, 4-axle, 5-axle and 6-axle).
The invention relates to a static and dynamic calibration system of a dynamic road weighing device, which comprises: the device comprises a portal frame 1, a cross beam 11, a servo electric cylinder 2, a force sensor 3, a pressure-bearing bottom plate 4, a control device 5, a static parameter memory 51, a dynamic parameter memory 52 and a static and dynamic mode change-over switch 6; the both ends of crossbeam 11 respectively with two 1 fixed connection of portal frame, servo electronic jar 2 the cylinder body with 11 fixed connection of crossbeam, servo electronic jar 2 output shaft 21 with side fixed connection goes up of force sensor 3, bearing plate 4 with force sensor 3's downside fixed connection, controlling means 5 with servo electronic jar 2 electricity is connected, static parameter memory 51, dynamic parameter memory 52, static and dynamic mode change over switch 6 all with controlling means 5 electricity is connected. In the calibration process, the portal frame 1 plays a supporting role, and the pressure-bearing bottom plate 4 is positioned above the road dynamic weighing equipment 8. The static and dynamic mode switch 6 is used for switching the static and dynamic loading state of the servo electric cylinder 2, when the static and dynamic mode switch 6 sends a static loading signal to the control device 5, the control device 5 calls the static parameter of the static parameter memory 51, and then controls the servo electric cylinder 2 to perform static loading output according to the static parameter; when the static/dynamic mode switching switch 6 sends a dynamic loading signal to the control device 5, the control device 5 retrieves the dynamic parameters of the dynamic parameter memory 52, and then controls the servo electric cylinder 2 to perform dynamic loading output according to the dynamic parameters. In the loading process of the servo electric cylinder 2, the output shaft 21 of the servo electric cylinder 2 moves downwards, and when the pressure-bearing bottom plate 4 is tightly attached to the weighing platform 82 and applies acting force downwards, namely for static loading, the weight 9 is simulated to be placed on the weighing platform 82 of the road dynamic weighing equipment 8; for dynamic loading, the wheels of the vehicle 10 are simulated to travel on the scale platform 82 of the road dynamic weighing apparatus 8; at the moment, the road dynamic weighing equipment 8 outputs the detected weight, the force sensor 3 outputs the reference weight, and the reference weight detects the loading force value of the servo electric cylinder 2. When the control device 5 causes the servo electric cylinder 2 to cancel the loading force value, the dynamic road weighing device 8 does not output the detected weight and the force sensor 3 does not output the reference weight, i.e. for static loading it is simulated that the weight 9 is taken away from the weighing platform 82 of the dynamic road weighing device 8 and for dynamic loading it is simulated that the wheels of the vehicle 10 leave the weighing platform 82 of the dynamic road weighing system. And obtaining the weighing error of the dynamic road weighing equipment 8 by comparing the detected weight with the reference weight, and realizing static and dynamic calibration of the dynamic road weighing system.
The loading force value F of the servo electric cylinder 2 is determined by the input current I, and the control device 5 changes the loading force value F of the servo electric cylinder 2 by adjusting the input current value I. The servo electric cylinder 2 is a conventional modularized product which integrally designs a servo motor and a lead screw, converts the rotary motion of the servo motor into linear motion, and simultaneously converts the best advantages of the servo motor, namely accurate rotation speed control, accurate rotation speed control and accurate torque control into accurate speed control, accurate position control and accurate thrust control; and high-precision linear motion series products are realized. The force sensor 3 accurately detects the load force value by using the existing high-precision force sensor.
And the keyboard 53 is further included, and the keyboard 53 is electrically connected with the control device 5. Parameters are input through the keyboard 53, and the loading condition of the servo electric cylinder 2 is conveniently adjusted. The parameters comprise static calibration parameters and dynamic calibration parameters, the static calibration parameters comprise a static loading force value F 'and a static loading pulse time t', and the control device 5 stores the static calibration parameters in the static parameter memory 51 after receiving the static calibration parameters; the dynamic calibration parameters comprise an axle type N of the vehicle 10, an axle distance L of two adjacent axles of the vehicle 10, a running speed v of the vehicle 10, a width L of the weighing platform 82, a dynamic value-added value F, dynamic loading pulse time T and interval time T. The control means 5 stores said dynamic calibration parameters in said dynamic parameter memory 52 after receiving them.
The road dynamic weighing system is characterized by further comprising a computer 7, a road dynamic weighing device 8 and a display 71, wherein the force sensor 3 and the road dynamic weighing device 8 are electrically connected with the computer 7, and the computer 7 is further electrically connected with the display 71. The computer 7 receives the data of the detected weight output by the dynamic road weighing device and the data of the reference weight output by the force sensor 3, then visually displays the data on the display 71, and displays the weighing error of the dynamic road weighing device.
Still include guide rail 14 and slider 15, guide rail 14 with the downside fixed connection of crossbeam 11, servo electric cylinder 2's cylinder body with slider 15 fixed connection, slider 15 with guide rail 14 sliding connection. The lateral position of the servo electric cylinder 2 can be changed.
The portal frame 1 comprises bearing upright columns 12 and longitudinal beams 13, the two ends of each longitudinal beam 13 are respectively fixedly connected with the upper ends of the corresponding bearing upright columns 12, the cross beam 11 is in sliding connection with the corresponding longitudinal beam 13, the lower ends of the corresponding bearing upright columns 12 are fixedly connected with a base 81 of the dynamic road weighing device 8, and the pressure-bearing bottom plate 4 is located above a weighing platform 82 of the dynamic road weighing device 8. The longitudinal position of the servo motor can be changed.
Further comprises a transverse driving device (not shown) and a longitudinal driving device (not shown), wherein the transverse driving device controls the sliding state of the slide block 15, and the longitudinal driving device controls the sliding state of the cross beam 11. The transverse driving device and the longitudinal driving device are both electrically connected with the control device 5. The transverse driving device and the longitudinal driving device are products in the prior art, and the transverse and longitudinal positions of the servo electric cylinder 2 are adjusted under the control of the control device 5 according to the loading area of the road dynamic weighing equipment 8, so that the unbalance loading test is facilitated.
Two servo electric cylinders 2, two force sensors 3 and two pressure bearing bottom plates 4 are arranged, and two weighing platforms 82 of the road dynamic weighing equipment 8 are arranged; when the vehicle 10 runs on the dynamic weighing apparatus 8, the two wheels on the same row of the vehicle 10 pass through the two weighing platforms 82.
A static mode indicator light 55 and a dynamic mode indicator light 56 are also included, and both the static mode indicator light 55 and the dynamic mode indicator light 56 are electrically connected with the control device 5. When the control device 5 controls the servo electric cylinder 2 to perform static loading, the control device 5 turns on the static mode indicator lamp 55 and turns off the dynamic mode indicator lamp 56; when the control device 5 controls the servo electric cylinder 2 to perform static loading, the control device 5 turns off the static mode indicator lamp 55 and turns on the dynamic mode indicator lamp 56; the working state of the static and dynamic calibration system is convenient for workers to identify.
Still include adapter 22, dynamic force source loading device's output shaft 21 with adapter 22 fixed connection, adapter 22 with force sensor 3 passes through bolt lock joint. 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.
The working mode of the static and dynamic calibration system of the dynamic road weighing system comprises the following steps:
s1, calibrating a servo electric cylinder 2: the pressure bearing bottom plate 4 is tightly attached to a rigid ground, such as a concrete ground and a rock ground. And adjusting the input current value I of the servo electric cylinder 2, wherein the servo electric cylinder 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 servo electric cylinder 2 is determined by the input current value I, so as to obtain the functional relationship F = F (I) between the loading force value F and the input current value I, the static and dynamic calibration system further includes a function memory 54, the function memory 54 is electrically connected to the control device 5, and the functional relationship F = F (I) is stored in the function memory 54. For example, when I =10A, F =50kN; that is, when the input current of the servo electric cylinder 2 is set to 10A, the output load force value of the output shaft 21 of the servo electric cylinder 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 servo electric cylinder 2 according to the functional relationship, so that the servo electric cylinder 2 outputs the required loading force value.
S10, equipment installation: installing a static and dynamic calibration system on a dynamic weighing device 8 of a road, wherein the portal frame 1 is fixedly connected with a base 81 of the dynamic weighing device 8 of the road, and the pressure-bearing bottom plate 4 is positioned above a weighing platform 82 of the dynamic weighing device 8 of the road; for the case that there is a certain travel H between the pressure-bearing base plate 4 and the weighing platform 82, a preload test needs to be performed.
S11, preloading test: the output shaft 21 of the servo electric cylinder 2 moves towards the weighing platform 82 of the dynamic weighing equipment 8 of the road by a stroke H until the gap between the pressure bearing bottom plate 4 and the weighing platform 82 of the dynamic weighing equipment 8 of the road is zero, the control device 5 is initialized, and then the servo electric cylinder 2 moves the roadThe weighing platform 82 of the dynamic weighing apparatus 8 applies a force value F of suitable magnitude 0 To ensure that the pressure-bearing bottom plate 4 is tightly pressed and attached to the weighing platform 82 of the dynamic road weighing device 8, and the force sensor 3 outputs a reference weight M 0 The road dynamic weighing equipment 8 outputs the detected weight m 0 And simultaneously resetting the force sensor 3 and the road dynamic weighing equipment 8. The preloading test is to ensure that the output end of the servo electric cylinder 2, namely the pressure-bearing bottom plate 4, is in gapless contact with the weighing platform 82 of the road dynamic weighing equipment 8, and prevent the impact effect generated by idle stroke in the loading process.
S20, setting parameters: the parameters comprise static calibration parameters and dynamic calibration parameters, the static calibration parameters comprise static loading force values F ' and static loading pulse time t ' of the servo electric cylinder 2, the number of the static loading force values F ' is multiple, and the number of the static loading pulse time t ' is consistent with that of the static loading force values F '. A plurality of static loading force values are in an increasing relationship, and one weight 9 is simulated and placed on the weighing platform 82 for a period of time, and then one weight 9 is added on the weighing platform 82.
The dynamic calibration parameters comprise a dynamic loading force value F, dynamic loading pulse time T and interval time T of the servo electric cylinder 2;
the dynamic calibration parameters further comprise the wheel base L of two adjacent shafts of the vehicle 10, the running speed v of the vehicle 10, and the width L of a weighing platform 82 of a road dynamic weighing system, wherein 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 10 travel on the weighing platform 82 of the road dynamic weighing device 8. The interval time T is the time when the front axle wheel 101 of the vehicle 10 leaves the scale platform 82 of the road dynamic weighing apparatus 8 and the rear axle wheel 102 of the vehicle 10 has not yet entered the scale platform 82 of the road dynamic weighing apparatus 8. According to the condition of the vehicle 10 to be simulated, the wheel base L of two adjacent shafts of the vehicle 10 can be measured; the width of the weighing platform 82 of the road dynamic weighing device 8 can be directly measured; according to the calibration requirements, the running speed v and the loading force value F of the vehicle 10 are set. For the two-axle type vehicle 10, there is only one vehicle 10 with the wheel base L of the two adjacent axles.
The parameters also comprise the axle type N of the vehicle 10, wherein N is more than or equal to 2, and the wheel base of two adjacent axles of the vehicle 10 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 a vehicle 10 of the three-axle type or more, there are wheel bases of two adjacent axles of the vehicle 10 or more, respectively. For example, the three-axle type vehicle 10: n =3, and the wheel base of two adjacent axles of the vehicle 10 is L 1 、L 2 (ii) a Interval time of T 1 And T 2 . Four-axle vehicle 10: n =4, and the wheel base of two adjacent axles of the vehicle 10 is L 1 、L 2 、L 3 (ii) a Interval time of T 1 、T 2 、T 3 . The static and dynamic calibration system of the present invention can simulate the calibration of a highway dynamic weighing apparatus 8 for vehicles 10 of various axle types.
The dynamic calibration parameters further 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 maximum loading force value F of the dynamic weighing equipment of the road max Is the maximum weighing of the highway dynamic weighing equipment. Therefore, dynamic loading covering the weighing range of the highway dynamic weighing equipment is realized.
Inputting the parameters to the control device 5, the control device 5 sending the static calibration parameters to the static parameter memory 51 and the dynamic calibration parameters to the dynamic parameter memory 52;
s30, loading test: when the static and dynamic mode switch 6 sends a static execution signal to the control device 5, the control device 5 retrieves the parameters in the static memory, and when the static and dynamic mode switch 6 sends a dynamic execution signal to the control device 5, the control device 5 retrieves the parameters in the dynamic memory; the control device 5 controls the servo electric cylinder 2 according to the adjusted parameters, so that the pressure-bearing bottom plate 4 applies downward acting force to the weighing platform 82 of the road dynamic weighing equipment 8; the operator operates the analog switch during calibration.
The weights 9 are placed on the weighing platform 82 of the dynamic road weighing device 8 or the wheels of the vehicle 10 are driven into the weighing platform 82 of the dynamic road weighing device 8, and the loading force value is output corresponding to the servo electric cylinder 2 so that the pressure bearing bottom plate 4 applies downward acting force to the weighing platform 82 of the dynamic road weighing device 8; the servo electric cylinder 2 is used to cancel the output load force value by removing the weights 9 from the weighing platform 82 of the dynamic road weighing device 8 or by removing the wheels of the vehicle 10 from the weighing platform 82 of the dynamic road weighing device 8.
S40, calibration test: the dynamic weighing equipment 8 of the said highway outputs and detects weight M, the said force transducer 3 outputs and consults weight M correspondingly, compare said detection weight M with said reference weight M, get the weighing error of the dynamic weighing equipment 8 of the said highway; the reference weight M output by the force sensor 3 is in accordance with the loading force value F of the set parameter.
For the static calibration condition, the dynamic road weighing device 8 outputs the detected weight M 'of the simulation weight 9, the force sensor 3 outputs the reference weight M' of the simulation weight 9, and the detected weight M 'is compared with the reference weight M' to obtain the static calibration result of the dynamic road weighing device 8.
For dynamic calibration, such as simulating a two-axle vehicle, after inputting parameters related to the two-axle vehicle, and after a loading test, the dynamic road weighing device 8 outputs a detected weight m corresponding to the front axle wheel 101 1 Detected weight m corresponding to rear axle wheel 102 2 ，m 1 +m 2 Namely the whole weight of the two-axle vehicle. The reference weight M corresponding to the front axle wheel 101 output from the contrast force sensor 3 1 Reference weight M corresponding to rear axle wheel 102 2 Vehicle weight M 1 +M 2 . That is, the dynamic weighing error of the dynamic road weighing device 8 of the two-axle vehicle 10 at a certain speed is measured after the axle type data and the speed data are changed, and the weighing error of the dynamic road weighing device 8 at different axle types and different speeds is obtained.
S41, repeatability test: and repeating S30 to S40 for multiple times, recording the test result, and calculating the repeatability error.
For the case of static calibration, i.e. to simulate placing the weight 9 on the weighing platform 82 of a road weighing device several times and then removing the weight 9. Since the real weight 9 is eliminated, it is only necessary to set the parameters of the number of tests in the control device 5, which avoids handling the weight 9 multiple times.
For the case of dynamic calibration, i.e., simulating multiple passes of a real vehicle 10 over the weighing platform 82 of the road dynamic weighing system 8. By eliminating the real vehicle 10 and setting the parameters of the test times in the control device 5, the static and dynamic calibration system of the invention is very convenient and efficient to carry out the repeatability test.
S42, unbalance loading test: the weighing platform 82 of the dynamic road weighing device 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 operation is switched to S30; when all the loading regions are tested, go to S50. As shown in FIG. 10, the scale platform 82 is divided into three load areas, a center 821, a left side 822, and a right side 823.
The cylinder body of the servo electric cylinder 2 is connected with the cross beam 11 in a sliding mode, and the cross beam 11 is connected with the longitudinal beam 13 in a sliding mode. The lateral and longitudinal positions of the servo electric cylinder 2 can be changed.
For the case of static calibration, the simulation was performed with the weight 9 placed in the middle 821, left 822 and right 823 of the scale platform 82 in succession.
For the dynamic calibration case, a real vehicle 10 is simulated to travel from the middle 821, left 822, right 823 of the scale platform 82.
The positions of the servo electric cylinder 2 and the pressure receiving base plate 4 are adjusted to the center 821, the left side 822, and the right side 823 of the weighing platform 82. The position of the servo electric cylinder 2 is adjusted by the transverse driving device and the longitudinal driving device.
And S50, completing static and dynamic calibration of the dynamic road weighing equipment.
While specific embodiments of the invention have been described, 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, as equivalent modifications and variations as will be made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the appended claims.
Claims (8)
1. A static and dynamic calibration system for a dynamic road weighing device, comprising:
the device comprises a portal frame, a cross beam, a servo electric cylinder, a force sensor, a pressure-bearing bottom plate, a control device, a static parameter memory, a dynamic parameter memory and a static and dynamic mode change-over switch;
the both ends of crossbeam respectively with two portal frame fixed connection, the cylinder body of servo electronic jar with crossbeam fixed connection, the output shaft of servo electronic jar with side fixed connection on force sensor, the pressure-bearing bottom plate with force sensor's downside fixed connection, controlling means with servo electronic jar electricity is connected, static parameter memory, dynamic parameter memory, static and dynamic mode change over switch all with controlling means electricity is connected.
2. The system of claim 1, further comprising a keyboard electrically coupled to the control device.
3. The system of claim 2, further comprising a computer, a dynamic road weighing device and a display, wherein the force sensor and the dynamic road weighing device are electrically connected to the computer, and the computer is further electrically connected to the display.
4. The static and dynamic calibration system for the dynamic road weighing device according to claim 2, further comprising a guide rail and a sliding block, wherein the guide rail is fixedly connected with the lower side surface of the cross beam, the cylinder body of the servo electric cylinder is fixedly connected with the sliding block, and the sliding block is slidably connected with the guide rail.
5. The static and dynamic calibration system of dynamic road weighing equipment as claimed in claim 4, wherein the portal frame comprises force bearing columns and longitudinal beams, two ends of the longitudinal beam are respectively and fixedly connected with the upper ends of the two force bearing columns, the transverse beam is in sliding connection with the longitudinal beam, the lower ends of the force bearing columns are fixedly connected with the base of the dynamic road weighing equipment, and the pressure bearing bottom plate is positioned above the weighing platform of the dynamic road weighing equipment.
6. The static and dynamic calibration system for a dynamic road weighing device according to claim 5, further comprising a lateral driving device and a longitudinal driving device, wherein the lateral driving device controls the sliding state of the sliding block, the longitudinal driving device controls the sliding state of the cross beam, and both the lateral driving device and the longitudinal driving device are electrically connected with the control device.
7. The system of claim 5, wherein there are two servo electric cylinders, two force sensors and two bearing plates, and there are two weighing platforms of the dynamic road weighing device.
8. The system of claim 2, further comprising a static mode indicator light and a dynamic mode indicator light, wherein the static mode indicator light and the dynamic mode indicator light are both electrically connected to the control device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210978205.1A CN115420363A (en) | 2022-08-16 | 2022-08-16 | Static and dynamic calibration system of dynamic road weighing equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210978205.1A CN115420363A (en) | 2022-08-16 | 2022-08-16 | Static and dynamic calibration system of dynamic road weighing equipment |
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| CN115420363A true CN115420363A (en) | 2022-12-02 |
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| CN202210978205.1A Pending CN115420363A (en) | 2022-08-16 | 2022-08-16 | Static and dynamic calibration system of dynamic road weighing equipment |
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