Optical self-detection linear beam type smoke-sensitive fire detector and on-site self-detection method

Abstract

The invention belongs to the technical field of fire detection, in particular to an optical self-detection linear beam type smoke-sensitive fire detector and an on-site self-detection method; the detector comprises a single-chip microcomputer, a signal receiving circuit and a signal answer circuit, and also comprises a linear beam type electrically-controlled dimming simulated smoke-sensitive optical self-detection circuit. Fire detection sensitivity detection and fault diagnosis can be provided for the detector in real time on site; an alarm signal is given out in self-detection if the performance indexes of the detector, such as fire detection function or sensitivity, are abnormal; therefore, the detector is far more advantageous than traditional linear beam type smoke-sensitive fire detectors in terms of main performances and technical indexes, such as convenient and effective daily maintenance and on-site detection, lower fault rate and false alarm rate, avoidance of fire alarm missing, and insurance of fire detection sensitivity; the detector serves as an advanced, reliable, practical and emergency novel fire detection and alarming product for firefighting security of large-space building sites in China.

Description

technical field [0001] The invention belongs to the technical field of fire detection, and in particular relates to an optical self-inspection linear beam smoke detector and an on-site self-inspection method. Background technique [0002] Linear beam smoke detectors are widely used in fire protection projects of large-space buildings and venues that play an important role in the national economy and social life. Large size, high location, complex distribution, inconvenient working conditions, high risk, on-site inspection and daily maintenance are very difficult, and there is a lack of convenient and effective on-site inspection and calibration methods. [0003] In order to cope with the difficulty of on-site detection, some unreasonable detection methods have appeared: 1) completely ignore the fire detection mechanism, and use wireless remote control or wired transmission to conduct false detection; 3) The detection method of blocking the light path by opaque and non-quant...

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Problems solved by technology

[0002] Linear beam smoke detectors are widely used in fire protection projects of large-space buildings and venues that play an important role in the national economy and social life. Large size, high location, complex distribution, inconvenient working conditions, high risk, on-site inspection and daily maintenance are very difficult, lack of convenient and effective on-site inspection and calibration methods

[0003] In order to cope with the difficulty of on-site detection, some unreasonable detection methods have appeared: 1) completely ignore the fire detection mechanism, and use wireless remote control or wired transmission to conduct false detection; 3) Use the detection method of opaque and non-quantified objects to block the light path; these methods that do not conform to the principle of fire detection and cannot really detect the product performance have brought hidden dangers to fire safety

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