×

Two-point calibration of a longitudinal acceleration sensor

  • US 6,347,541 B1
  • Filed: 06/29/1999
  • Issued: 02/19/2002
  • Est. Priority Date: 06/29/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of calibrating an acceleration sensor for a vehicle, the acceleration sensor being connected to an electronic control unit, comprising the steps of:

  • positioning the acceleration sensor at a first angle A1;

    communicating the first angle A1 to the electronic control unit;

    measuring a first output voltage V1 of the acceleration sensor at the first angle A1;

    positioning the acceleration sensor at a second angle A2;

    communicating the second angle A2 to the electronic control unit;

    measuring a second output voltage V2 of the acceleration sensor at the second angle A2;

    calculating a sensitivity factor as a ratio equal to a difference between the first and second output voltages V2−

    V1 divided by a difference between the first and second angles A2−

    A1;

    calculating a zero position output voltage which is equal to the first output voltage minus a product of the sensitivity factor times the sine of the first angle.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×