Pinch detection system

Details Pinch detection system Pinch detection system

2005-01-11

2005-01-11

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

C073S761000, C318S469000, C318S476000

Reexamination Certificate

active

06840113

ABSTRACT:
A pinch detection system and method controls the speed of a motor moving an object by first calculating the actual motor force and then comparing the actual motor force with a reference force value in a reference field. A pinch condition is indicated if the difference between the actual force and the reference force exceeds a selected pinch threshold. The difference is also used to update the reference field, the pinch threshold and the desired speed of the motor so that the reference field will eventually reflect the actual force profile of the object. The updated pinch threshold is also used to control the motor speed so that the pinching force remains constant regardless of the pinch threshold value.

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International Search Report, dated Dec. 11, 2002.

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