Glass break detection with noise riding feature

Details Glass break detection with noise riding feature Glass break detection with noise riding feature

1994-04-08

1995-08-01

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

73658, 340566, G08B 1304

Patent

active

054383170

ABSTRACT:
In a glass break detector, noise is removed by averaging the signal before it is analyzed for the characteristics that typically accompany glass breaking events. Low frequency signals, associated with glass flexing before it shatters, are isolated from repetitive or symmetrical noise in the same frequency range to increase the signal-to-noise ratio of the detector, improving sensitivity to valid glass breaking events and reducing false alarms.

REFERENCES:
patent: 4091660 (1978-05-01), Yanagi
patent: 4134109 (1979-01-01), McCormick et al.
patent: 4307387 (1981-12-01), Baxendale
patent: 4668941 (1987-05-01), Davenport et al.
patent: 4803468 (1989-02-01), Seifert
patent: 4853677 (1989-08-01), Yarbrough et al.
patent: 5117220 (1992-05-01), Marino et al.
patent: 5192931 (1993-03-01), Smith et al.

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