S923 digital intelligent pyroelectric sensor
I. overview
The digital intelligent pyroelectric sensor s923 uses a special analog-to-digital hybrid processing integrated circuit as a built-in processing chip, which combines the complete functions required by a single passive infrared pyroelectric mobile detector. The input terminal with high input impedance is used to access pyroelectric sensitive element, pyroelectric signal is converted into 16 bit digital signal, and further processed by digital band-pass filter, then compared with threshold value to obtain mobile detection signal, all signal processing is completed on chip.
Two, characteristics
The pyroelectric signal is processed by digital signal processing technology.
N two differential high input impedance inputs are used as sensor sensitive element inputs.
N a 16 bit high-precision AD converter is used to convert the voltage signal generated by the sensor into a digital signal.
N a second-order Butterworth band-pass filter is used to filter the output digital signal of AD converter, effectively filtering the low-frequency and high-frequency noise interference caused by various reasons.
N as the signal processing is all completed in the shielded shell, it has a stronger anti radio interference ability.
N the sensitivity threshold and timing time can be adjusted by the external partial resistance.
N the input end of the illuminance sensor can control the sensor to work when the ambient illuminance is lower than the set illuminance.
N low voltage, low power consumption.
Three, use
N automatic lighting control of indoor light, corridor, stair light, etc.
N solar automatic induction lamp
N automatic door
N infrared mobile intrusion detector
N Internet of things infrared mobile detection
N camera automatic control
N toys
N automatic control of digital photo frame and building advertising screen
N automatic control of home appliances such as computers, televisions, refrigerators, air conditioners and drinking fountains
N occupation detection
N automobile anti-theft system