Fire and explosion detection and suppression
First Claim
1. A fire and explosion detection system for detecting fire or explosion within an area to be protected, comprisingradiation detection means operative to produce an alarm signal in response to the detection of electromagnetic radiation from a source within the said area and thereby indicative of a fire or explosion in the said area,non-radiation-responsive transducer means operative to detect the existence within the said area of a predetermined non-radiation parameter and thereby indicating that the source of electromagnetic radiation to which the radiation detection means is responsive is one in response to which no alarm signal is required, andinhibit means responsive to the non-radiation-responsive transducer means for blocking such alarm signal.
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Accused Products
Abstract
A fire and explosion detection and suppression system protects a hangar within which may be stored jet aircraft whose engines may be run up particularly in the re-heat mode. Two radiation sensors are mounted within the hangar and detect for at least predetermined amounts of radiation of predetermined and different types (e.g. one sensor may be a UV sensor and the other may be an IR sensor). When they simultaneously detect sufficient radiation, they operate an AND gate. This fires off suppressor units. To prevent false alarms due to radiation emitted by a running jet engine or a jet engine running in re-heat mode, such a running jet engine is sensed by a transducer responsive to the emitted acoustic or vibrational energy. This blocks the AND gate.
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Citations
10 Claims
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1. A fire and explosion detection system for detecting fire or explosion within an area to be protected, comprising
radiation detection means operative to produce an alarm signal in response to the detection of electromagnetic radiation from a source within the said area and thereby indicative of a fire or explosion in the said area, non-radiation-responsive transducer means operative to detect the existence within the said area of a predetermined non-radiation parameter and thereby indicating that the source of electromagnetic radiation to which the radiation detection means is responsive is one in response to which no alarm signal is required, and inhibit means responsive to the non-radiation-responsive transducer means for blocking such alarm signal.
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7. A fire and explosion detection and suppression system, for protecting an area in which jet aircraft may be stored, comprising
radiation detection means for detecting electromagnetic radiation arising from such fires and explosions within the said area and for producing a respective alarm signal, suppression means within the area and responsive to the alarm signal to discharge fire and explosion suppressant into the area, and transducer means responsive to the acoustic or vibrational energy emitted by a running jet engine for inhibiting the production of the said alarm signal.
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10. A fire and explosion detection and suppression method, for protecting an area in which jet aircraft may be stored, comprising the steps of
detecting electromagnetic radiation arising from such fires and explosions within the said area and for producing a respective alarm signal. responding to the said alarm signal by discharging fire and explosion suppressant into the area, and responding to the acoustic or vibrational energy emitted from a running jet engine by inhibiting the production of the said alarm signal.
Specification