G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 21/00 (2006.01) F16K 17/36 (2006.01) G08B 21/16 (2006.01)
Patent
CA 2308938
A safety system for a building has an excess gas flow detector circuit for detecting gas flow in a gas supply pipe. The safety system can also include an earthquake detector for detecting ground accelerations exceeding a threshold acceleration/frequency curve dividing safe and hazardous ground accelerations throughout a predetermined frequency range. The earthquake detector includes an accelerometer for measuring linear acceleration along an axis, and for generating an acceleration signal indicative of a magnitude of the measured acceleration. A filter circuit produces a filtered acceleration signal from the acceleration signal. The gain/frequency characteristic of the filter circuit is a reflection of the threshold acceleration/frequency curve, such that ground accelerations falling on the threshold acceleration/frequency curve yield a filtered acceleration signal having a substantially constant value throughout the frequency range. Finally, a threshold circuit compares the filtered acceleration signal to a predetermined threshold voltage, and produces an earthquake detected signal indicative of the comparison result. The safety system can also include a gas detector circuit capable of detecting a gas in air, and generating a gas detected signal in response to detection of the gas. A smoke detector circuit can also be provided for generating a smoke detected signal. A main unit including a microprocessor is responsive to the excess gas flow detected signal, the earthquake detected signal, the gas detected signal and the smoke detected signal. A valve controller closes a gas valve to shut off a supply of gas in response to the first control signal.
Pokrajac Dalibor
Wood Raymond
Barrigar Intellectual Property Law
Smart Sensor Technologies Inc.
LandOfFree
Excess gas flow, earthquake, gas and smoke detector and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Excess gas flow, earthquake, gas and smoke detector and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excess gas flow, earthquake, gas and smoke detector and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1990266