title: [Study on the application of pyroelectric infrared sensor to safety protection system].
abstract: Using the infrared ray of human body, which is received and magnified by pyroelectric infrared sensor to form a certain voltage control signal, and using the control signal to trigger a voice recording-reproducing circuit, a pyroelectric infrared detector voice device with auto-control function designed. The circuit adopted new pyroelectric infrared detector assembly and voice recording-reproducing assembly. When someone is present in the detectable range of the pyroelectric infrared detector, first, the pyroelectric infrared sensor will transform the incepted radiation energy to a electric signal, which is then magnified and compared by an inside circuit, and an output control signal, touches off the voice recording-reproducing assembly with the reproducer sending out a beforehand transcribed caution voice to wise the man who does not know well the surrounding condition that the frontage is a danger zone and should not be approched. With the design of integrated structures, the distance-warning device has the advantages of strong anti-jamming ability, low temperature resistance, working stability and use-convenience, and it can be suitably installed and used in several locations which may endanger person safety, such as substation, high voltage switch panel, electric transformer, etc.
authors.affiliation: Physics and Electronic Science Department, Luoyang Normal College, Luoyang 471022, China.
authors.forename: Song-de
authors.initials: SD
authors.lastname: Wang
authors.forename: Shuan-ji
authors.initials: SJ
authors.lastname: Zhang
authors.forename: Xiao-long
authors.initials: XL
authors.lastname: Zhu
authors.forename: Jie-hui
authors.initials: JH
authors.lastname: Yang