If those objects move to an extent above a preset threshold, the microcomputer turns on the light. Passive infrared sensors (PIR), also called “passive infrared detectors” (PID), use a camera with a lens opaque to visible light to constantly monitor the temperature of objects within their field of view.Īny object that emits at a temperature above room temperature is “seen” by the camera.Ī microcomputer attached to the PIR monitors the position of any above room temperature heat sources relative to the sensor. Infrared radiation exists in the wavelength range between 700 nm and 1 mm (2.75591e-5 in and 0.04 in). Humans and most objects we interact with emitting excess energy in the form of infrared radiation ( IR), colloquially known as “ heat.” But it’s detectable by electronic devices.
Under normal circumstances, this radiation isn’t visible to the human eye. There are three types of motion sensors used in commercially available motion sensor lights: Passive InfraredĮverything that exists at a temperature above absolute zero (0 K, -273.15 ℃, -459.67 ℉, 0 °R) constantly releases excess energy in the form of electromagnetic radiation.
#KEEP LIGHT SWITCH IN ON POSITION PROFESSIONAL#
Have the Motion Sensors Adjusted by a Qualified Professional How Motion Sensors Work
0 kommentar(er)
