Title:
PIR SENSOR SIGNAL TRIGGERING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/182099
Kind Code:
A1
Abstract:
Disclosed are a PIR sensor signal triggering method and device. The method comprises: setting a first voltage threshold and a second voltage threshold; generating a triggering signal within a preset time duration range starting timing at the moment while a monitoring signal generated by a PIR sensor reaches the first voltage threshold and when the number of times that the monitoring signal generated by the PIR sensor alternatively reaches the first voltage threshold and the second voltage threshold reaches a set number of times. The first voltage threshold and the second voltage threshold are voltage thresholds that a waveform generated by a human body on the PIR sensor can reach the set number of times within the preset time duration range and waveforms generated by other heat sources other than the human body on the PIR sensor cannot reach the set number of times within the preset time duration range. The present application achieves the accurate recognition and signal triggering of the waveform for the human body by using the characteristic of different waveforms generated by the heat sources such as the human body and hot air on the PIR sensor.
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Inventors:
WU ZHAOJIE (CN)
HUANG HAIJIANG (CN)
HUANG HAIJIANG (CN)
Application Number:
PCT/CN2020/078459
Publication Date:
September 17, 2020
Filing Date:
March 09, 2020
Export Citation:
Assignee:
HANGZHOU HIKVISION DIGITAL TEC (CN)
International Classes:
G08B13/191; G08B29/18
Foreign References:
| US3896311A | 1975-07-22 | |||
| US4612442A | 1986-09-16 | |||
| CN202075426U | 2011-12-14 | |||
| CN104021641A | 2014-09-03 |
Attorney, Agent or Firm:
PATENTSINO IP FIRM (CN)
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