Speed detection methods and devices

Details Speed detection methods and devices Speed detection methods and devices

2007-07-10

2007-07-10

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Velocity or velocity/height measuring

C356S005010

Reexamination Certificate

active

11085426

ABSTRACT:
A speed detection method. A range finder acquires a specific number of distance measurement samples of an object during a period of time. A new unit of measurement larger than respective movement distances of the object in a first period and a second period is acquired. Rough measured distances D1and D2respectively corresponding to the locations of the object in the first period and the second period are calculated by comparing portions of the distance measurement samples corresponding to the first period and the second period utilizing the new unit of measurement. A scope is determined based on the D1and D2for filtering the distance measurement samples. The speed of the object is calculated based the filtered distance measurement samples.

REFERENCES:
patent: 4907154 (1990-03-01), Yasuda et al.
patent: 5793477 (1998-08-01), Laakmann
patent: 6466307 (2002-10-01), Chien et al.
patent: 2002/0063858 (2002-05-01), Patterson

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