Speed calculation derived from distance pulses utilizing acceler

Details Speed calculation derived from distance pulses utilizing acceler Speed calculation derived from distance pulses utilizing acceler

1996-09-16

1999-09-28

Wachsman, Hal Dodge

Data processing: measuring, calibrating, or testing

Measurement system

Speed

702149, 702147, 702142, 701 93, 73488, 73511, G01P 1500

Patent

active

059603771

ABSTRACT:
The present invention provides a system which calculates vehicle speeds from distance pulses utilizing vehicle acceleration. More particularly, the present invention calculates vehicle speed through a system comprising a speed input task and a speed output task. The speed input task generates a speed value and an acceleration value from a pulse train delivered by a distance sensor or electronic transmission. The acceleration, deceleration or steady state of the motor vehicle is determined in the input task through use of the distance sensor tolerance. The output task drives the speedometer according to the new speed value from the input task if a new speed value has been generated since the last execution of the output task. If no new speed value has been generated since the last execution of the output task, the output task drives the speedometer according to the acceleration value. Thus, the output task is executed periodically regardless of the sequence of pulses received in the input task.

REFERENCES:
patent: 4849892 (1989-07-01), McCombie
patent: 5103413 (1992-04-01), Ohata
patent: 5222024 (1993-06-01), Orita et al.
patent: 5636145 (1997-06-01), Gorman et al.
patent: 5740083 (1998-04-01), Anderson et al.

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