G - Physics – 12 – B
Patent
G - Physics
12
B
G12B 13/00 (2006.01) G08B 29/20 (2006.01) G08B 13/04 (2006.01)
Patent
CA 2639226
A system and method for calibrating an acoustic detector. The method includes the steps of simultaneously transmitting an acoustic signal and an electromagnetic signal to an acoustic detector, receiving both signals, calculating a timing difference between the reception of the acoustic signal and electromagnetic signal, and setting a first time threshold used to determine if a glass panel is broken using the calculated difference and storing the first time threshold. A sensitivity level is also set based upon the determined timing difference. A unique key signature in the acoustic signal and electromagnetic signal is detected and matched with a stored signature to determine whether the signals are from a calibration signal. The timing difference is only calculated if both signals are calibration signals.
Gowling Lafleur Henderson Llp
Honeywell International Inc.
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