针对亟需矿用火灾烟雾传感器检定装置的需求,提出矿用烟雾传感器的检定方法.根据朗伯比尔定律,将检定装置测量的遮光率推算到1 m 厚度烟雾遮光率;运用激光散射测量原理,提高低浓度烟雾的测量灵敏度;采用高速同步触发烟雾传感器和外部光功率计的标定方案,解决无标准烟雾试样的困难.实现一套检定装置,主要由烟雾发生器、激光测量单元、处理电路等组成,具有响应快、测量精度高、灵敏度高等优点,也适用于地面消防用粒子型烟雾传感器的检定和传感器出厂校准.

Aiming at the needs for calibration device of mine fire smoke sensor,verification method of mining smoke sensor is proposed.According to Lambert-beer's law and the shading rate of the measuring beam,the shading rate at which laser beam passes through one meter thickness smoke is calculated.Based on the principle of laser scattering measurement,the aim for high sensitivity measurement of low concentration smoke is achieved.Utilizing high speed synchronous trigger calibration scheme of smoke sensor and external optical power meter,the difficulty of lack of standard material is solved when calibrating.With characteristics of fast response,high measuring precision and high sensitivity,a set of device has be realized and mainly composed of a smoke generator,the laser measuring unit and the processing circuit.The device is also applicable to factory calibration of ground fire smoke sensor of particle type.