What are some common types of infrared sensors? In what main aspects do different infrared sensors differ from one another?
Release time:
2020-07-30
Principle: Any object with a temperature above absolute zero (-273 degrees Celsius) emits electromagnetic radiation. The radiation emitted by the human body falls within the infrared range of the electromagnetic spectrum. Passive Infrared (PIR) motion detectors exploit this principle. They are equipped with highly sensitive infrared sensors that respond to even subtle changes in heat sources by altering their voltage output. The sensor’s detection area is divided into discrete zones by a split mirror; if a heat source is detected moving across any of these zones, it triggers a change in voltage, thereby activating or deactivating lighting or other electrical loads.
Principle: Any object with a temperature above absolute zero (-273 degrees Celsius) emits electromagnetic radiation. The radiation emitted by the human body falls within the infrared range of the electromagnetic spectrum.
Passive infrared (PIR) motion detectors operate on this principle. They are equipped with highly sensitive infrared sensors that respond to even the slightest changes in heat sources by altering their voltage output. The sensor's detection range is divided into discrete zones by a split mirror. If a heat source is detected moving within any of these segmented zones, it triggers a change in voltage, which can then be used to control lighting or other electrical loads.
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