Vehicle acceleration sensor

Details Vehicle acceleration sensor Vehicle acceleration sensor

1993-02-01

1994-11-08

Black, Thomas G.

Boots, shoes, and leggings

36442602, 36455101, 180197, 375 99, G06F 1550, B60K 3100

Patent

active

053633008

ABSTRACT:
A vehicle accelerometer measures vehicle acceleration and provides acceleration data subject to contamination by noise signals. The acceleration data is filtered by a filter. A predetermined function of the noise level in the acceleration data is compared with the filter error which is the difference between raw acceleration data and the filtered value of acceleration. When the filter error is less than the noise level, the filter time constant is set to establish a low cutoff frequency so that the filter rejects the noise like a conventional low pass filter. When the filter error becomes greater than the predetermined function of the noise level, the filter time constant is set to establish a higher cutoff frequency so that the filtered value of acceleration converges to the ideal value faster than would occur with the filter having the lower cutoff frequency.

REFERENCES:
patent: 4105258 (1978-08-01), Bornfleth
patent: 4758959 (1988-07-01), Thoone et al.
patent: 4765648 (1988-08-01), Mander et al.
patent: 5063782 (1991-11-01), Kellett
patent: 5123714 (1992-07-01), Mori
patent: 5146417 (1992-07-01), Watson
patent: 5243544 (1993-09-01), Schoess
patent: 5265472 (1993-11-01), Pfeifle et al.

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