Tire mark piezoelectric type automobile wheelbase difference detection error compensation method and device

Tire mark piezoelectric type automobile wheelbase difference detection error compensation method and device

  • CN 101,576,371 A
  • Filed: 06/14/2009
  • Published: 11/11/2009
  • Est. Priority Date: 06/14/2009
  • Status: Active Application
First Claim
Patent Images

1. , a kind of tire mark piezoelectric type automobile wheelbase difference detection error compensation method, it is characterized in that, four of interior shop piezoelectric cable (5) the identical parallel symmetries of detection platen are installed on the ground, both sides of tested vehicle direct of travel, impose on the detection overall process voltage signal curve that the pressure that detects platen causes according to left and right wheels, obtain left and right wheels arrival and detect platen mistiming, the lateral attitude when the left and right wheels process detects platen and wheel instantaneous velocity, thereby calculate automobile front axle left and right wheels ground connection center difference DELTA S through the detection platen q, in like manner, measure automobile hind axle left and right wheels difference DELTA S h, try to achieve the detection error that the automobile curve driving is brought according to the error compensation theoretical model of being set up then, error amount is Δ

  • S w, calculate vehicle right and left wheelbase difference at last and be;

    Δ

    S=Δ

    S q+ Δ

    S h

    S w, concrete steps are as follows;

    (1) automobile the near front wheel trace center is by the antemarginal moment of ladder type pressing plate (4-2) &

    Delta;

    t1=t22+t242,
    In like manner, automobile off-front wheel trace center by ladder type pressing plate (4-4) edge constantly &

    Delta;

    t2
    =t42+t442;

    (2) automobile front axle left and right wheels ground connection center is by the mistiming Δ

    t of back ladder type platen edge q

    t 2

    t 1(3) the automobile revolver is by detecting the instantaneous velocity of platen Vq1=ht22-t11,H is detection platen width, In like manner can get right wheel by detecting the instantaneous velocity V of platen Q2(4) automobile front axle is by the instantaneous velocity of pick-up unit vq=vq1+vq22;

    (5) automobile front axle two-wheeled relative difference Δ

    S q

    t qV q, In like manner can get rear axle two-wheeled relative difference Δ

    S h(6) acting on the area that detects on the platen by the size of analog voltage signal value with wheel is directly proportional and can gets relational expressionU1U1+U2=x1h,Thereby obtain x 1(7) &

    Delta;

    d1=x1tg&

    phi;

    ,
    In like manner know Δ

    d 2(8)Δ

    d=

    Δ

    d 1

    d 2

    (9) according to corresponding geometric relationship, can obtain the compensating error value &

    Delta;

    Sw=2L2&

    CenterDot;

    d&

    CenterDot;

    &

    Delta;

    d
    L2+&

    Delta;

    d
    2
    -d&

    CenterDot;

    &

    Delta;

    d
    .

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