PIR PASSIVE INFRAREDPIR SENSOR SECURITY SYSTEM INCLUDING THE PIR SENSOR AND METHOD FOR OPERATING THE SECURITY SYSTEM

摘要

A passive infrared (PIR) sensor according to an embodiment of the present invention includes a PIR sensing module for sensing a human body, a temperature sensor for measuring an ambient temperature and generating a measurement value, a memory for storing a reference temperature received from the input interface, A processor for calculating a difference between the measured value and the reference temperature, generating a control signal for controlling the sensitivity of the PIR sensing module based on the calculation result, and outputting the generated control signal to the PIR sensing module Wherein the PIR sensing module includes a sensitivity adjustment circuit for adjusting the sensitivity in response to the control signal and detects the human body based on the adjusted sensitivity.;