What is the purpose of infrared sensors?

1 Answers
DeCarter
07/29/25 9:00pm
Here are the uses of infrared sensors: 1. Perceive certain characteristics of the surrounding environment; 2. Measure the heat emitted by objects and detect motion: For example, cars and televisions use infrared detectors to interpret signals sent from remote controls. Below is the classification of infrared sensors based on operation: 1. Thermal type: Converts part of infrared rays into heat, extracting output signals such as resistance changes and electromotive force through heat. 2. Quantum type: Utilizes the photoelectric effect of semiconductor migration to absorb energy differences and the quantum type that employs the photovoltaic effect of PN junctions.
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