提高火灾烟雾传感器检测精度的方法  

Method for detection precision improving of fire smog sensor

作　　者：张思祥[1] 甘凯 周围[1] ZHANG Sixiang;GAN Kai;ZHOU Wei(Research Institute of Modern Measurement and Control Technology,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学现代测控技术研究所,天津300130

出　　处：《传感器与微系统》2021年第1期151-153,共3页Transducer and Microsystem Technologies

摘　　要：针对目前市面上普遍销售的烟雾火灾报警器存在测量精度不高、报警延时较长的问题,提出一种基于电路和光路两方面的改进方法。首次利用了信号的调制与解调方法,将光信号进行调制从而排除其他干扰光的影响,对电压信号进行差分放大,通过增加光程来提高光的吸收率,从而提高测量灵敏度。通过理论分析、电路设计以及实验,验证可以将检测时间缩短6~10 s,提高检测精度40%以上。Aiming at the problems of low measurement precision and long alarm delay of smog fire alarm widely sold on the market,an improved method based on circuit and optical path is studied.This method for the first time uses the modulation and demodulation of the signal in the measurement and control circuit to modulate the optical signal so as to eliminate the influence of other interfering light.Differential amplification is carried out on voltage signal,absorptivity of light can be improved by increasing the optical path,so as to improve the measurement sensitivity.Through theoretical analysis,circuit design and experiment,it is proved that the detection time can be shortened by 6~10 seconds.It can improve the detection precision by more than 40%.

关 键 词：烟雾传感器 调制与解调 报警延时 检测精度 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]