Abstract: In order to improve the reliability of automatic fire alarm system and find a way to reduce the false alarm rate of photoelectric smoke detector, the research results, product characteristics and inspection standards of photoelectric smoke detection technology at home and abroad in recent years were investigated, and the technical status and development trend of photoelectric smoke detector were analyzed. Results show that in order to solve the problem of false alarm, technological research and development can be carried out in the direction of improving photoelectric sensor scheme, optimizing smoke identification algorithm, and using composite sensor, but more important, timely promulgate and update of corresponding national standards to lead the healthy development of the industry.

Key words:  smoke detection, fire alarm, labyrinth, anti-interference