Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1990-08-21
1992-10-06
Ng, Jin F.
Communications: electrical
Condition responsive indicating system
Specific condition
250339, 236 492, G08B 1712, F24F 700
Patent
active
051535637
ABSTRACT:
A fire sensing system, a process for sensing a fire and an environment monitor are disclosed. The system includes infrared sensors with sensing wavelength bands sensing an infrared radiation from an infrared source. One of the sensing wavelength bands is a CO.sub.2 -molecular resonance radiation wavelength band. The system determines whether a disastrous fire occurs or not on the basis of outputs of the sensors and a change in a ratio of the outputs. The process computes the temperature of the infrared source from a ratio of outputs of infrared sensors with at least two sensing wavelength bands of an infrared radiation from a monitored area, produces the intensity of infrared radiation of either of the bands from the computed temperature and computes a heating area from the intensity and the output of a corresponding infrared sensor. The process determines the progress of a fire. The monitor produces a control signal to an air conditioner or room heater-and-cooler from outputs of sensors and an output of a thermometer.
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Goto Haruhisa
Miyamoto Keiichi
Naya Kazunari
Sato Hiroomi
Segawa Hideo
Kajima Corporation
Mullen Jr. Thomas J.
Ng Jin F.
Nippon Mining Co., Ltd.
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