The Ultimate Guide to Infrared Motion Sensor
16th Aug 2023
What is infrared motion sensor Infrared motion sensors, also known as passive infrared (PIR) sensors, are electronic devices that detect infrared radiation emitted by objects in their field of view. These sensors are widely used in various applications, from security systems and automatic lighting to energy-saving devices and smart home automation. The ultimate guide to infrared motion sensors provides comprehensive insights into their technology, applications, and advantages, showcasing their significance in modern technology and everyday life. Working Principle of Infrared Motion Sensor Infrared motion sensors work based on detecting changes in infrared radiation emitted by warm objects in their surroundings. The sensors consist of one or more pyroelectric sensors that detect infrared radiation. When a warm object moves within the sensor’s field of view, it causes a change in the amount of infrared radiation detected by the sensor. This change triggers the sensor to send a signal, indicating motion, which can be used to trigger various actions or alarms. Types of Infrared Motion Sensors Passive Infrared (PIR) Sensors: PIR sensors are the most common infrared motion sensors. They detect changes in infrared radiation but do not emit any radiation themselves. PIR sensors are widely used in security systems, automatic lighting, and occupancy detection. Active Infrared (AIR) Sensors: AIR sensors emit and detect infrared radiation. They are commonly used in distance measurement, obstacle detection, and object counting applications. Dual Technology Sensors: Dual technology sensors combine infrared technology with other sensing technologies, such as microwave or ultrasonic sensors. The combination of these technologies improves accuracy and reduces […]
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