Abstract: The invention discloses a smoke detection method, which comprises the steps of: adjusting a detection period of a smoke alarm to be a rapid detection period when a smoke density is detected to meet a set density threshold; calculating a ratio of an electrical signal increment caused by a first transmitted signal to an electrical signal increment caused by a second transmitted signal; and increasing a smoke alarm threshold when smoke is judged not to be caused by a fire hazard based on the ratio. In the invention, different types of smoke can be identified and different alarm modes can be selected to solve the problem of a false alarm.
Type:
Grant
Filed:
July 29, 2019
Date of Patent:
September 8, 2020
Assignee:
SITERWELL ELECTRONICS CO., LIMITED
Inventors:
Dongfang Chen, Xingxing Huang, Qingqin Shi