Safety cutoff power window control device

Details Safety cutoff power window control device Safety cutoff power window control device

1994-06-27

1996-06-11

Wysocki, Jonathan

Electricity: motive power systems

Motor-reversing

Periodic- or intermittent-reversing

318466, 49 26, H02P 300

Patent

active

055258760

ABSTRACT:
A control device for detecting the presence of an obstacle on the basis of the current absorbed by the motor controlling the window in the course of an opening or closing stroke. For effectively distinguishing an obstacle from other factors, such as defects on the window guide resulting in a regular, local increase in current absorption, the current measurement is integrated and compared with threshold values varying within the stroke and describing a reference line consisting of a number of line portions, each equal in value to the integral of the current in a respective portion of the stroke in the absence of an obstacle.

REFERENCES:
patent: 4347465 (1982-08-01), Goertler et al.
patent: 4364003 (1982-12-01), Phipps
patent: 4453112 (1984-06-01), Sauer et al.
patent: 4621452 (1986-11-01), Deeg
patent: 4641067 (1987-02-01), Iizawa et al.
patent: 4732238 (1988-03-01), Baumgartner
patent: 4983896 (1991-01-01), Sugiyama et al.
patent: 5069000 (1991-12-01), Zuckerman

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