Title:
SMOKE-SENSING ALARM AND FIRE DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/192047
Kind Code:
A1
Abstract:
A smoke-sensing alarm, comprising a housing and a circuit board (2) provided inside the housing. The circuit board (2) comprises a microcontroller module (2a), a smoke-sensing module (3), an alarm module (2b), and an ultrasonic module (8); when the smoke-sensing module (3) detects that indoor smoke concentration exceeds a threshold, the ultrasonic module (8) is started continuously for preset times to detect predetermined monitoring spaces to obtain ultrasonic data comprising echo time and an echo intensity value corresponding to the echo time; when a wave crest peak value change, a fluctuation frequency, and a fluctuation amplitude in the ultrasonic data exceed preset conditions, sending an alarm signal. The alarm is added with an ultrasonic function on the basis of an existing smoke-sensing alarm, the ultrasonic module (8) is started to further determine smoke flow intensity when the smoke-sensing module (3) detects that the smoke concentration exceeds the threshold, and by means of two different modes of smoke situation determination methods, in combination with the advantages of both, the final smoke alarm accuracy rate is high, and the occurrence of false alarms is reduced.
Inventors:
XU CHENGJIAN (CN)
GONG DAGUO (CN)
CHEN CHENG (CN)
LI XIAOLONG (CN)
GUO ZHANGLE (CN)
ZHU NENGHUI (CN)
HUANG ZHENCHUAN (CN)
GONG DAGUO (CN)
CHEN CHENG (CN)
LI XIAOLONG (CN)
GUO ZHANGLE (CN)
ZHU NENGHUI (CN)
HUANG ZHENCHUAN (CN)
Application Number:
PCT/CN2019/106999
Publication Date:
October 01, 2020
Filing Date:
September 20, 2019
Export Citation:
Assignee:
WENZHOU LIANAN IOT TECH CO LTD (CN)
International Classes:
G08B17/10; G08B29/18
Foreign References:
| JP4396333B2 | 2010-01-13 | |||
| JP4396333B2 | 2010-01-13 | |||
| CN108765859A | 2018-11-06 | |||
| CN104112324A | 2014-10-22 | |||
| CN109801469A | 2019-05-24 |
Attorney, Agent or Firm:
SHANGHAI GOOIP CO., LTD. (CN)
Download PDF: