CN107991022A - Automobile wheel track, wheelbase, centroid position method for automatic measurement - Google Patents
Automobile wheel track, wheelbase, centroid position method for automatic measurement Download PDFInfo
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- CN107991022A CN107991022A CN201711315305.1A CN201711315305A CN107991022A CN 107991022 A CN107991022 A CN 107991022A CN 201711315305 A CN201711315305 A CN 201711315305A CN 107991022 A CN107991022 A CN 107991022A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/12—Static balancing; Determining position of centre of gravity
- G01M1/122—Determining position of centre of gravity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
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Abstract
The invention discloses a kind of automobile wheel track, wheelbase, centroid position method for automatic measurement, first vehicle, which is opened on testing stand, keeps balance static, each tire of vehicle is pressed respectively against on four weighing plates on testing stand, and four weighing plate sensors below each weighing plate can measure pressure g respectively1~g16, and each weighing plate pressure P1~P4, and test automobile gross mass P can be obtainedtotal, according to formula：Measure wheelbase；FormulaFront tread can be measured；FormulaRear tread can be measured；Testing stand is overturn afterwards, makes test vehicle static still in balancing, measures the height of center of mass h of test vehicle0：Automobile wheel track, wheelbase and centroid position measurement can be performed fully automatic in the present invention, and time of measuring shortens, data accuracy is high.
Description
Technical field
The present invention relates to technical field of vehicle detection, espespecially a kind of automobile wheel track, wheelbase, centroid position automatic measurement side
Method.
Background technology
Location of Mass Center of Automobiles be influence vehicle safety can key technical index, according to national standard-
《GB17578-2013, car superstructure intensity requirement and test method》The measurement of middle annex I vehicle centroids and industry mark
It is quasi-《JT/T887-2014 car centroid position measuring methods》, three barycenter transverse direction, longitudinal direction, height sides are determined to measurement request
To centroid position numerical value.Barycenter laterally, the measurement of lengthwise position when wheel load meter can be used to be carried out on level ground, relatively
Simply, and in the measurement in height of center of mass direction, it is necessary to which test vehicle antero posterior axis is formed difference in height, purpose is vehicle is inclined
Tiltedly, while to limit vehicle rolling, inclination of vehicle angle is calculated (or by angle by measuring vehicle wheelbase and antero posterior axis difference in height
Degree measurement is directly read), while the data for reading each wheel load meter are used for centroid calculation.The measuring method in practical applications,
Limited by many factors, it usually needs test of many times corrects data, and it is larger to test time-consuming longer and error.
In the concrete application of above-mentioned centroid position measuring method, it usually needs use wheel load meter, lifting equipment, backman
Utensil, it is necessary to which the work coordinated is more, such as experiment prepares, lifting support staff, data record, it is logical after data acquisition
Often also need to the wheelspan to automobile, wheelbase measures work, there are certain measurement error, in summary data carry out matter
Scheming is calculated, and causing whole experiment process to take, longer and error is larger, and the experience that is put to the test limitation, ordinary test personnel are not easy to slap
Hold a full set of test method.
Therefore, how to design a kind of measurement of full automatic wheelspan, wheelbase, centroid position is that the present inventor concentrates on studies
Problem.
The content of the invention
It is an object of the invention to provide a kind of automobile wheel track, wheelbase, centroid position method for automatic measurement, it can entirely certainly
The dynamic measurement for carrying out automobile wheel track, wheelbase and centroid position, and time of measuring greatly shortens, data accuracy is high.
To achieve these goals, technical solution of the invention is：A kind of automobile wheel track, wheelbase, centroid position are certainly
Dynamic measuring method, it includes following measuring process：
(1) test vehicle is opened on testing stand and keeps balance inactive state, four tires of test vehicle is pressed respectively
On four pieces of weighing plates on testing stand, four weighing plate sensors below each weighing plate can measure pressure g respectively1~
g16, so as to obtain each weighing plate pressure P1~P4, and test vehicular gross combined weight P can be obtainedtotal, can according to formula below
Horizontality test vehicle wheelbase L, front and rear wheel are calculated respectively away from T1、T2：
Wherein：Q1、Q5The fore-and-aft distance of respectively forward and backward single weighing plate sensor mount point；Q2Pressed by axle
Fore-and-aft distance between weighing plate sensor mount point；Q3For the lateral separation of single weighing plate sensor mount point；Q4For left and right
Wheel presses the lateral separation between weighing plate sensor mount point；g1~g16Pressure suffered by respectively each weighing plate sensor；
P1~P4Respectively each weighing plate pressure, formula T1：Forward direction drive upper testing stand when be front tread, tested in reverse driving
It is rear tread during platform, formula T2：Forward direction is rear tread when driving to appear on the stage, and reverse driving is front tread when appearing on the stage；
(2) testing stand is carried out to the upset of predetermined angular, flip angle is surveyed by the angular transducer being arranged in rotation axis
, test vehicle is measured the height of center of mass h for testing vehicle under heeling condition still in balance inactive state0：
Wherein：α is the angle of testing stand upset；L is the distance for testing vehicle centroid distance front-wheel；T is test vehicle matter
The heart and works as T apart from the distance of vehicle center line2＞ T1When above formula, work as T2＜ T1When following formula.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, wherein height of center of mass h in the step (2)0
Barycenter needed for calculation formula is away from preceding shaft position calculation formula：
Wherein P3、P4For two weighing plate pressures；L is vehicle wheelbase；PtotalTo test vehicle
Gross mass.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, wherein height of center of mass h in the step (2)0
Barycenter needed for calculation formula is 2 away from vehicle center line calculation formula
Wherein P1~P4Respectively each weighing plate pressure；T1、
T2For front and rear wheel away from；PtotalTo test vehicular gross combined weight.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, wherein the vehicle wheelbase in the step (1)
L, front and rear wheel is away from T1、T2Height of center of mass h in measure equation and step (2)0Measure equation is the built-in algorithm that PLC writes,
Calculated by the one-key operation of testing stand operating system, and the front and rear wheel measured in step (1) under horizontality is away from T1、T2, it is total
Quality Ptotal, horizontal centroid data storage be used for step (2) in height of center of mass h0Secondary calculating.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, wherein the experiment in the step (1), (2)
Platform includes the mechanical platform structure with testing stand basis on the basis of same plane and one end are articulated with testing stand, and the machinery is flat
Platform structure upper surface is equipped with four open slots, and weighing plate is respectively equipped with each open slot, and each weighing plate bottom surface is left and right
The weighing plate sensor, the mechanical platform structure and experiment stylobate are respectively equipped between the slot bottom of side and corresponding opening groove
Lifting structures are equipped between plinth, the testing stand realizes angle rotation and positioning by lifting structures.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, wherein the left and right side of each weighing plate with
Two lateral support rollers are respectively equipped between corresponding opening groove.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, wherein described mechanical platform structure one end passes through
Rotation axis and testing stand basis are hinged, and the rotation axis is equipped with the angular transducer.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, wherein the lifting structures include hydraulic oil
Cylinder, the cylinder body of the hydraulic cylinder and the suspension end of telescopic rod are individually fixed in the basic and described mechanical platform knot of the testing stand
On structure.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, wherein testing stand basis upper surface is equipped with
Stepped groove, the mechanical platform structure are arranged in the stepped groove, and one end of the mechanical platform structure is articulated with stepped groove side
On wall, the other end of the mechanical platform structure is placed on the step of stepped groove.
After using the above scheme, method that automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement pass through rollover
To realize front and rear wheel away from T1、T2, wheelbase L, centroid position determine, arrange and can independently survey on turnover mechanism platform structure
Four pieces of weighing plates of positive pressure force information are measured, arrange four weighing plate sensors under every piece of weighing plate, first by vehicle tyre during experiment
Be pressed on weighing plate, carry out horizontal centroid calculating, by built-in calculation formula, system calculate automatically test vehicle before,
Rear tread T1、T2, wheelbase L, transverse direction, the lengthwise position of horizontal centroid, test vehicle is after the upset of mechanical platform structure by high accuracy
Angular transducer acquisition platform angle information, four weighing plate sensors being arranged in below each weighing plate only gather weighing plate
Perpendicular to the normal pressure of mechanical platform structure direction, the secondary acquisition to tire positive pressure force information is completed, by built-in algorithm,
The data of horizontality needed for the automatic calling of system, calculate the height of center of mass h of test vehicle0, it is all in the measuring method
Data acquisition is directly embedded into parameter by collecting sensor signal to PLC programmable controller or when passing through programming, whole
A process reduces multiple measurement error and the error artificially inputted, so as to ensure that the standard of test data without manual intervention
True property and efficiency, the measurement of automobile wheel track, wheelbase and centroid position is performed fully automatic in it, and time of measuring greatly shortens, data are accurate
True property is high.
Brief description of the drawings
Fig. 1 is that test vehicle automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement horizontal checkout state are shown
It is intended to；
Fig. 2 is that test vehicle automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement inclining test state are shown
It is intended to；
Fig. 3 is to horizontal, the longitudinal algorithm schematic diagram of the wheelbase, wheelspan, barycenter of test vehicle with the present invention；
Fig. 4 is that automobile wheel track of the present invention, wheelbase, the height of center of mass position computational algorithm of centroid position method for automatic measurement push away
Lead figure.
Below in conjunction with the accompanying drawings, by embodiment, the present invention is described further；
Embodiment
A kind of automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement, it includes following measuring process：
(1) as shown in Figure 1, after test vehicle 1 is opened in testing stand, each tire 4 of test vehicle 1 is made to be pressed respectively against experiment
On four pieces of weighing plates 2 on platform, switch-off makes test vehicle 1 be in balance inactive state, and four below each weighing plate 2 are outstanding
Arm beam type weighing plate sensor 3 can measure pressure g respectively1~g16, 16 weighing plate sensors 3 that this programme uses
Data independently can show and store, and can obtain each 2 pressure P of weighing plate1~P4, and 1 gross mass P of test vehicletotal,
The built-in algorithm formula write by PLC, one-key operation calculating, is each public affairs of built-in algorithm below in testing stand operating system
Formula, can calculate the wheelbase L for testing vehicle 1, front and rear wheel away from T respectively1、T2, and the wheelspan T tested under horizontality1、T2, it is total
Quality Ptotal, horizontal centroid data are stored in being used for secondary calculating in PLC：
Wherein：Q1、Q5The fore-and-aft distance of respectively forward and backward single weighing plate sensor mount point；Q2Pressed by axle
Fore-and-aft distance between weighing plate sensor mount point；Q3For the lateral separation of single weighing plate sensor mount point；Q4For left and right
Wheel presses the lateral separation between weighing plate sensor mount point；g1~g16Pressure suffered by respectively each weighing plate sensor；
P1~P4Respectively each weighing plate pressure, above-mentioned formula T1：Forward direction drive upper testing stand when be front tread, in reverse driving
It is rear tread during testing stand, formula T2：Forward direction is rear tread when driving to appear on the stage, and reverse driving is front tread when appearing on the stage；
(2) as shown in Fig. 2, test vehicle 1 is after the test of horizontality is completed, operating operation test platform carries out predetermined angular
Upset, flip angle are measured by angular transducer 5, test vehicle 1 is tilted still in balance inactive state, the collection of weighing plate 2
The positive pressure force information P of each tire 4 afterwards1~P4, the built-in algorithm formula write by PLC, when system calls horizontal checkout automatically
Calculating data result and this test data, in testing stand operating system one-key operation calculate, below to calculate test carriage
1 height of center of mass h0Built-in algorithm formula：
Wherein：α is the angle of testing stand upset；L is the distance for testing vehicle centroid distance front-wheel；T is test vehicle matter
The heart and works as T apart from the distance of vehicle center line2＞ T1When above formula, work as T2＜ T1When following formula.
As shown in Figure 3 with the present invention to horizontal, the longitudinal algorithm schematic diagram of the wheelbase, wheelspan, barycenter of test vehicle, Xia Shuwei
Vehicle wheelbase L, front and rear wheel are away from T1、T2And height of center of mass h0The derivation of built-in formula, test vehicle 1 be parked in four pieces it is independent
On weighing plate 2, Q in this figure1~Q5The relative position that each weighing plate sensor 3 is installed is given data, P1~P4, g1~g16Wheel
4 positive pressure force data of tire and the pressure data of single weighing plate sensor 3 are actually measured by weighing plate sensor 3, tire pressure point
Center P1~P4Specific location can be according to each weighing plate sensor 3 relative to the specific location numerical value of each weighing plate sensor 3
Measured data g1~g16With Q1~Q5Obtain.Four tires 4 of test vehicle 1 maintain equilibrium-like on four pieces of weighing plates 2
State, based on principle of moment balance, can derive following relation (with reference to figure 3)：
(1) tire normal pressure P1The central point at place acts on distance g1、g2The torque of the axis of line is equal to g3、g4Point positive pressure
The sum of power is multiplied by Q1The torque that numerical value produces；
(2) tire normal pressure P1The central point at place acts on distance g1、g3The torque of the axis of line is equal to g2、g4Point positive pressure
The sum of power is multiplied by Q3The torque that numerical value produces；
(3) tire normal pressure P2The central point at place acts on distance g5、g6The torque of the axis of line is equal to g7、g8Point positive pressure
The sum of power is multiplied by Q1The torque that numerical value produces；
(4) tire normal pressure P2The central point at place acts on distance g5、g7The torque of the axis of line is equal to g6、g8Point positive pressure
The sum of power is multiplied by Q3The torque that numerical value produces；
(5) tire normal pressure P3The central point at place acts on distance g9、g10The torque of the axis of line is equal to g11、g12Point is just
The sum of pressure is multiplied by Q5The torque that numerical value produces；
(6) tire normal pressure P3The central point at place acts on distance g9、g11The torque of the axis of line is equal to g10、g12Point is just
The sum of pressure is multiplied by Q3The torque that numerical value produces；
(7) tire normal pressure P4The central point at place acts on distance g13、g14The torque of the axis of line is equal to g15、g16Point
The sum of normal pressure is multiplied by Q5The torque that numerical value produces；
(8) tire normal pressure P4The central point at place acts on distance g13、g15The torque of the axis of line is equal to g14、g16Point
The sum of normal pressure is multiplied by Q3The torque that numerical value produces；
To sum up, derive that the computational algorithm of wheelbase and wheelbase is as follows：
(special instruction：Above computational methods have been contemplated that test vehicle can not be completely parallel to testing stand, write from memory in this algorithm
Recognize the positive driving of vehicle to appear on the stage).
Similarly, test vehicle 1 kept under the support of four tires 4 balance, based on principle of moment balance can derive as
Lower relation：
(1) the normal pressure P that vehicular gross combined weight producestotalThe torque acted on apart from front axle is multiplied by axis equal to rear axle normal pressure
The torque produced away from L numerical value；
(2) the normal pressure P that vehicular gross combined weight producestotalThe torque for acting on vehicle center line is equal to left and right sides tire normal pressure
Difference be multiplied by front and rear wheel respectively away from T1、T2The sum of torque that the 1/2 of numerical value produces；
To sum up, barycenter is as follows away from vehicle center line computational algorithm with barycenter away from preceding shaft position：
As shown in figure 4, whole vehicle is above-mentioned still in balance inactive state even in test vehicle 1 in an inclined state
The relation derived based on principle of moment balance is stood good, and details are not described herein again.Understood from derivation graph by b, c and angle [alpha] group
Into right angled triangle and h0, the right angled triangle where x sides be similar triangles, wherein angular values α is by angular transducer 5
Given value is given, the line segment length on b sides can be obtained according to equalising torque relation, c sides can be calculated according to trigonometric function relation
Length, c is while can be according to wheelspan T with line segment total length during x1、T2, wheelbase L, barycenter be calculated away from vehicle center line t values.
Similarly according to trigonometric function relation, obtain the length on x sides and can obtain and calculate height of center of mass h0。
In conclusion height of center of mass computational algorithm is as follows：
Special instruction：
(1) above computational methods have been contemplated that the unequal situation of 1 antero posterior axis of test vehicle, work as T2＞ T1When above formula, T2
＜ T1When following formula；
(2) locking tire 4 is needed to hang when calculating vehicle centroid by the above process, each 4 pressurising of tire is equal, tumbles angle not
Preferably excessive, acquiescence ignores tire micro-deformation.
With reference to shown in Fig. 2, the testing stand being previously mentioned in above-mentioned measuring process (1), (2) is included with testing stand basis 7 same
One plane and one end are articulated with the mechanical platform structure 8 on testing stand basis 7, the upper surface on testing stand basis 7 by rotation axis 6
Equipped with stepped groove 9, mechanical platform structure 8 is arranged in stepped groove 9, and one end of mechanical platform structure 8 is articulated with rank by rotation axis 6
On the side wall of terraced groove 9, the other end of mechanical platform structure 8 is placed on the step of stepped groove 9.Rotation axis 6 is equipped with the angle
Spend sensor 5.8 upper surface of mechanical platform structure is equipped with four open slots 10, and rectangle weighing plate is respectively equipped with each open slot 10
2,2 are respectively equipped between the bottom surface left and right side of each weighing plate 2 and the slot bottom of corresponding opening groove 10 and is hung down for gathering weighing plate 2
Directly in the beam type weighing plate sensor 3 of 8 normal pressure of mechanical platform structure, left and right side and the corresponding opening groove of each weighing plate 2
Two lateral support rollers 11 are respectively equipped between 10.Lifting structures are equipped between mechanical platform structure 8 and testing stand basis 7,
Testing stand realizes angle rotation and positioning by lifting structures.Lifting structures include hydraulic cylinder 12, the cylinder body of hydraulic cylinder 12
And the suspension end of telescopic rod is individually fixed in testing stand basis 7 and mechanical platform structure 8.
Automobile wheel track of the present invention, wheelbase, centroid position method for automatic measurement by the method for rollover come realize front and rear wheel away from
T1、T2, wheelbase L, centroid position determine, on turnover mechanism platform structure 8 arrangement can independently measure positive pressure force information
Four pieces of weighing plates 2, every piece of weighing plate 2 times arrangements, four beam type weighing plate sensors 3, when experiment, first press vehicle tyre 4
On weighing plate 2, carry out horizontal centroid calculating, by built-in calculation formula, system calculate automatically test vehicle 1 before,
Rear tread T1、T2, wheelbase L, transverse direction, the lengthwise position of horizontal centroid, test vehicle 1 is after the upset of mechanical platform structure 8 by high-precision
5 acquisition platform angle information of angular transducer is spent, four weighing plate sensors 3 being arranged in below each weighing plate 2 only gather
Weighing plate 2 completes the secondary acquisition to 4 positive pressure force information of tire, by interior perpendicular to the normal pressure in 8 direction of mechanical platform structure
The algorithm put, the data of horizontality, calculate the height of center of mass h for testing vehicle 1 needed for the automatic calling of system0, the measurement side
All data acquisitions are by collecting sensor signal to PLC programmable controller in method or while passing through programming is directly embedding
Enter parameter, whole process reduces multiple measurement error and the error artificially inputted, so as to ensure that experiment without manual intervention
The accuracy and efficiency of data, the measurement of automobile wheel track, wheelbase and centroid position is performed fully automatic in it, and time of measuring contracts significantly
It is short, data accuracy is high.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the scope of the present invention
It is defined, on the premise of design spirit of the present invention is not departed from, technology of this area ordinary skill technical staff to the present invention
The various modifications and improvement that scheme is made, should all fall into the protection domain that claims of the present invention determines.
Claims (9)
1. a kind of automobile wheel track, wheelbase, centroid position method for automatic measurement, it is characterised in that including following measuring process：
(1) test vehicle is opened on testing stand and keeps balance inactive state, four tires of test vehicle is pressed respectively against examination
Test on four on platform pieces of weighing plates, four weighing plate sensors below each weighing plate can measure pressure g respectively1~g16,
So as to obtain each weighing plate pressure P1~P4, and test vehicular gross combined weight P can be obtainedtotal, can be divided according to formula below
Horizontality test vehicle wheelbase L, front and rear wheel are not calculated away from T1、T2：
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<msub>
<mi>g</mi>
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<mo>&times;</mo>
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<mn>3</mn>
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</mrow>
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<mi>g</mi>
<mn>14</mn>
</msub>
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</msub>
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<mo>&times;</mo>
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<mn>3</mn>
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</msub>
</mfrac>
<mo>&rsqb;</mo>
</mrow>
<mn>2</mn>
</msup>
<mo>+</mo>
<msup>
<mrow>
<mo>&lsqb;</mo>
<mo>|</mo>
<mfrac>
<mrow>
<mo>(</mo>
<msub>
<mi>g</mi>
<mn>11</mn>
</msub>
<mo>+</mo>
<msub>
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<mn>12</mn>
</msub>
<mo>)</mo>
<mo>&times;</mo>
<msub>
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<mn>5</mn>
</msub>
</mrow>
<msub>
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</msub>
</mfrac>
<mo>-</mo>
<mfrac>
<mrow>
<mo>(</mo>
<msub>
<mi>g</mi>
<mn>15</mn>
</msub>
<mo>+</mo>
<msub>
<mi>g</mi>
<mn>16</mn>
</msub>
<mo>)</mo>
<mo>&times;</mo>
<msub>
<mi>Q</mi>
<mn>5</mn>
</msub>
</mrow>
<msub>
<mi>P</mi>
<mn>4</mn>
</msub>
</mfrac>
<mo>|</mo>
<mo>&rsqb;</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
</msqrt>
<mo>;</mo>
</mrow>
Wherein：Q1、Q5The fore-and-aft distance of respectively forward and backward single weighing plate sensor mount point；Q2Pressed and weighed by axle
Fore-and-aft distance between plate sensor mount point；Q3For the lateral separation of single weighing plate sensor mount point；Q4For left and right wheels institute
Press the lateral separation between weighing plate sensor mount point；g1~g16Pressure suffered by respectively each weighing plate sensor；P1~P4
Respectively each weighing plate pressure, formula T1：Forward direction drive upper testing stand when be front tread, it is reverse drive be during above testing stand
Rear tread, formula T2：Forward direction is rear tread when driving to appear on the stage, and reverse driving is front tread when appearing on the stage；
(2) testing stand is carried out to the upset of predetermined angular, flip angle is measured by the angular transducer being arranged in rotation axis, made
Vehicle is tested still in balance inactive state, measures the height of center of mass h that vehicle is tested under heeling condition0：
<mrow>
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<mi>h</mi>
<mn>0</mn>
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<mi>a</mi>
<mi>n</mi>
<mi>&alpha;</mi>
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<mo>(</mo>
<msub>
<mi>T</mi>
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</msub>
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</msub>
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<msub>
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<mi>c</mi>
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</mfrac>
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<mi>t</mi>
<mo>)</mo>
</mrow>
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<mfrac>
<mrow>
<mo>(</mo>
<msub>
<mi>P</mi>
<mn>2</mn>
</msub>
<mo>&times;</mo>
<msub>
<mi>T</mi>
<mn>1</mn>
</msub>
<mo>+</mo>
<msub>
<mi>P</mi>
<mn>4</mn>
</msub>
<mo>&times;</mo>
<msub>
<mi>T</mi>
<mn>2</mn>
</msub>
<mo>)</mo>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>t</mi>
<mi>o</mi>
<mi>t</mi>
<mi>a</mi>
<mi>l</mi>
</mrow>
</msub>
<mo>&times;</mo>
<mi>cos</mi>
<mi>&alpha;</mi>
</mrow>
</mfrac>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Wherein：α is the angle of testing stand upset；L is the distance for testing vehicle centroid distance front-wheel；T be test vehicle centroid away from
With a distance from vehicle center line, and work as T2＞ T1When above formula, work as T2＜ T1When following formula.
2. automobile wheel track as claimed in claim 1, wheelbase, centroid position method for automatic measurement, it is characterised in that the step
(2) height of center of mass h in0Barycenter needed for calculation formula is away from preceding shaft position calculation formula：
Wherein P3、P4For two weighing plate pressures；L is vehicle wheelbase；PtotalTo test the total matter of vehicle
Amount.
3. automobile wheel track as claimed in claim 1, wheelbase, centroid position method for automatic measurement, it is characterised in that the step
(2) height of center of mass h in0Barycenter needed for calculation formula is away from vehicle center line calculation formula：
Wherein P1~P4Respectively each weighing plate pressure；T1、T2For
Front and rear wheel away from；PtotalTo test vehicular gross combined weight.
4. automobile wheel track as claimed in claim 1, wheelbase, centroid position method for automatic measurement, it is characterised in that the step
(1) the vehicle wheelbase L, front and rear wheel in are away from T1、T2Height of center of mass h in measure equation and step (2)0Measure equation is that PLC is compiled
The built-in algorithm write, is calculated by the one-key operation of testing stand operating system, and measured in step (1) under horizontality
Front and rear wheel is away from T1、T2, gross mass Ptotal, horizontal centroid data storage be used for step (2) in height of center of mass h0Secondary calculating.
5. automobile wheel track as claimed in claim 1, wheelbase, centroid position method for automatic measurement, it is characterised in that the step
(1), the testing stand in (2) includes the mechanical platform with testing stand basis on the basis of same plane and one end are articulated with testing stand
Structure, the mechanical platform structure upper surface are equipped with four open slots, and weighing plate is respectively equipped with each open slot, each described
The weighing plate sensor is respectively equipped between the slot bottom of weighing plate bottom surface left and right side and corresponding opening groove, the machinery is flat
Lifting structures are equipped between platform structure and testing stand basis, the testing stand realizes angle rotation and positioning by lifting structures.
6. automobile wheel track as claimed in claim 5, wheelbase, centroid position method for automatic measurement, it is characterised in that each title
Two lateral support rollers are respectively equipped between the left and right side and corresponding opening groove of weight plate.
7. automobile wheel track as claimed in claim 6, wheelbase, centroid position method for automatic measurement, it is characterised in that the machinery
Platform structure one end is hinged by rotation axis and testing stand basis, and the rotation axis is equipped with the angular transducer.
8. automobile wheel track as claimed in claim 7, wheelbase, centroid position method for automatic measurement, it is characterised in that the lifting
Structure includes hydraulic cylinder, the cylinder body of the hydraulic cylinder and the suspension end of telescopic rod be individually fixed in the testing stand basis and
In the mechanical platform structure.
9. automobile wheel track as claimed in claim 8, wheelbase, centroid position method for automatic measurement, it is characterised in that the experiment
Stylobate plinth upper surface is equipped with stepped groove, and the mechanical platform structure is arranged in the stepped groove, and the one of the mechanical platform structure
End is articulated with ladder groove sidewall, and the other end of the mechanical platform structure is placed on the step of stepped groove.
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| CN201711315305.1A CN107991022B (en) | 2017-12-12 | 2017-12-12 | Automobile wheel track, wheelbase, centroid position method for automatic measurement |
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| CN109580097A (en) * | 2018-12-25 | 2019-04-05 | 南京工业大学 | Tractor rollover centroid detection experiment platform and detection method thereof |
| CN110654188A (en) * | 2019-10-28 | 2020-01-07 | 武汉齐物科技有限公司 | Tire pressure monitoring device and method |
| CN110926696A (en) * | 2019-11-26 | 2020-03-27 | 北京新立机械有限责任公司 | Mass center measuring device for large special vehicle |
| CN111076946A (en) * | 2020-01-02 | 2020-04-28 | 中国科学院苏州生物医学工程技术研究所 | Method and device for automatically measuring wheel track, wheel width, wheel base, pose and mass center of vehicle |
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| CN111076946A (en) * | 2020-01-02 | 2020-04-28 | 中国科学院苏州生物医学工程技术研究所 | Method and device for automatically measuring wheel track, wheel width, wheel base, pose and mass center of vehicle |
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| CN111504309A (en) * | 2020-04-28 | 2020-08-07 | 东风汽车集团有限公司 | Method for calculating pose of automobile in low-speed motion |
| CN111504309B (en) * | 2020-04-28 | 2021-09-10 | 东风汽车集团有限公司 | Method for calculating pose of automobile in low-speed motion |
| CN113739723A (en) * | 2020-05-28 | 2021-12-03 | 广州汽车集团股份有限公司 | Ice surface flatness adjusting system and method |
| CN114509210A (en) * | 2022-02-21 | 2022-05-17 | 江铃汽车股份有限公司 | Vehicle load mass and centroid position measuring method |
| CN114509210B (en) * | 2022-02-21 | 2024-03-15 | 江铃汽车股份有限公司 | Vehicle-mounted mass and mass center position measuring method |
| CN116086579A (en) * | 2023-04-07 | 2023-05-09 | 四川省公路规划勘察设计研究院有限公司 | Portable pressure measurement system and pressure measurement method |
| CN116086579B (en) * | 2023-04-07 | 2023-06-16 | 四川省公路规划勘察设计研究院有限公司 | Portable pressure measurement system and pressure measurement method |
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