Vehicle intrusion detector

Details Vehicle intrusion detector Vehicle intrusion detector

1992-07-01

1994-12-27

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340429, 340522, 340566, G08B 1316

Patent

active

053769198

ABSTRACT:
A vehicle detector is disclosed wherein either a glass breakage signal or a door opening signal causes an alarm. The glass breakage signal is caused by the detection of high audio frequency simultaneously accompanied by the detection of a positive pressure change. The door opening signal is generated by the detection of a negative pressure change, which is not preceded by a positive pressure change.

REFERENCES:
patent: 4853677 (1989-08-01), Yarbrough et al.
patent: 4928085 (1990-05-01), DuRand, III et al.
patent: 4991145 (1991-02-01), Goldstein et al.
patent: 5185593 (1993-02-01), DuRand, III et al.
patent: 5192931 (1993-03-01), Smith et al.

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