Composite fire detector applied to airplane cargo space special environment
A technology of fire detectors and aircrafts, applied in fire alarms, instruments, alarms, etc., can solve the problems of ignoring the influence of environmental pressure, rising smoke alarm threshold, slow response, etc., to achieve clear and intuitive detection algorithm, improve Accuracy, the effect of improving responsiveness
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[0023] The invention selects components on the basis of fully considering the accuracy and stability of the detector.
[0024] 1) The sensor module 1 includes a smoke sensor, a thermal sensor, a carbon monoxide sensor, a pressure sensor, and a humidity sensor. The smoke sensor adopts laser smoke sensing technology, including laser drive circuit, laser diode, optical smoke chamber, and silicon photocell. The laser drive circuit adopts constant current source drive chip IC-WKN, and the laser diode adopts N-type semiconductor laser diode with a power of 5mw and a wavelength of 850nm. The light-receiving element is made of large-area silicon photocells, which can improve the sensitivity to weak scattered light detection. The thermal sensor adopts Pt100 with faster response and stable operation, and the temperature measurement range is -200~850℃. The carbon monoxide sensor chooses TGS5042 electrochemical sensor, which has the characteristics of good gas selectivity, strong anti-g...
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