What Are the Different Types of Motion Detectors?
There are five basic types of motion detectors, and the active infrared (IR) and passive infrared (PIR) detectors are the most common types used. Other versions or types are the continuous wave (CW) radar, ultrasonic motion and vibration motion detectors. The main difference between active and passive types of motion detectors is that active detectors send out signals and search for motion, while passive detectors do not emit any signal. A passive detector reacts to a signal that is sent to the detector, such as noticeable body heat or sound waves. An active detector, however, sends out a pulse of ultrasonic sound waves and measures the reflection of the waves to detect motion.
Original Article Source Credits: Wise Geek ,https://www.wise-geek.com/
Article Written By: Lori Kilchermann
Original Article Posted on: February 09, 2021
Link to Original Article: https://www.wise-geek.com/what-are-the-different-types-of-motion-detectors.htm