本文提出了由一氧化碳、光电感烟和温度传感器构成的复合火灾探测器 ,它由低功耗二氧化锡一氧化碳传感器、散射光烟雾探测和半导体温度传感器构成 ,在其自带微处理器中使用复合偏置滤波算法对输入信号进行处理。该探测器已通过各种欧洲标准试验火的测试 ,结果表明使用监测一氧化碳浓度的复合探测器能够更加有效地探测火灾 In this paper, a composite fire detector composed of carbon monoxide, photoelectric smoke and temperature sensor is proposed. It consists of low-power tin dioxide carbon monoxide sensor, scattered light smoke detection and semiconductor temperature sensor. Bias filter algorithm to process input signal. The probe has passed various European standard test fire tests, the results show that the use of composite detectors to monitor carbon monoxide concentration can more effectively detect fire