Apparatus and method for measuring forward direction of vehicle

Details Apparatus and method for measuring forward direction of vehicle Apparatus and method for measuring forward direction of vehicle

1990-01-05

1992-07-21

Cuchlinski, Jr., William A.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

33361, 33357, 36457102, 36457105, G01C 1728, G01C 1738

Patent

active

051311550

ABSTRACT:
An apparatus and method for measuring a forward direction of a vehicle in which to derive a coordinate position of a center (O.sub.x, O.sub.y) of a directional circle derived from an output of a geomagnetic direction sensor after a magnetization on a vehicle body occurs, the magnetization on the vehicle body is determined from the output of the geomagnetic direction sensor installed in the vehicle and each parameter of a peak quantity (X.sub.max, Y.sub.max), peak direction (D.sub.x, D.sub.y), and a center value of an output circle before the present disturbance occurs is calculated, optimum coefficients are selected and set according to each parameter from among the previously derived coefficients, a magnetization quantity is calculated from each parameter and each optimum coefficient using a linear combination technique, and the coordinate position of the center of the output circle after the magnetization on the vehicle body occurs from the derived magnetization quantity.

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