Air-breathing high-sensitivity smoke particle detector and application thereof
A high-sensitivity, smoke particle technology, applied in particle suspension analysis, instruments, alarms, etc., can solve the problem of single monitoring of smoke particles, to overcome the delay and interference of air flow in the protection area, eliminate the impact of detection accuracy, It is beneficial to the effect of subsequent signal processing
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[0026] In this embodiment, the structure of the aspirated high-sensitivity smoke particle detector is set as follows: the smoke particle detector is arranged at the end of the suction pipe of the monitored area, the air sample is actively extracted and filtered through the suction pipe, and the detector uses laser The particle scattering method detects the smoke particles with a particle size not greater than 20 μm in the actively drawn and filtered air sample, and obtains the detection signal. In the super-early and early stage of the fire, the particle size of the smoke particles is mostly concentrated at about 1 μm. In this embodiment, the large particles are filtered out of the air sample, because when the large particles enter the detector, they will scatter more energy forward. Affect the correlation coefficient between the detection value and the smoke particle concentration value, and cause interference to the detection result of the smoke particle concentration.
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