Vehicle travel direction estimating device

Details Vehicle travel direction estimating device Vehicle travel direction estimating device

1991-12-27

1993-11-30

Chin, Gary

Boots, shoes, and leggings

36442602, 303103, B60T 832

Patent

active

052671666

ABSTRACT:
A vehicle travel direction estimating device is provided which has a wheel speed calculating device for calculating the speed and acceleration Aw of a vehicle. In addition, a gravity-type accelerometer is provided for producing a gravitationally detected acceleration Am. When both Aw and Am increase or decrease simultaneously, it is determined that the vehicle is travelling forward, and when one of Aw and Am increases while the other decreases, it is determined that the vehicle is travelling in reverse. To detect this feature, a calculating system is provided to form differential values Daw and Dam from accelerations Aw and Am. The vehicle travel direction is estimated using the differential values Daw and Dam.

REFERENCES:
patent: 4758959 (1988-07-01), Thoone et al.
patent: 5058023 (1991-10-01), Kozikaro
patent: 5122960 (1992-06-01), OOka

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