C. PIR Motion sensor
The purpose of motion sensor in this project was to detect
any presence of human within the range of the sensor.
Regarding to its name, passive infra red (PIR), infrared was
the measuring parameter of the sensor. Infrared is the portion
of the electromagnetic spectrum that falls between
microwaves and visible light. The Figure 4 shows PIR Sensor.
The infrared has wavelengths longer than visible light but
shorter than microwaves. Humans, at normal body
temperature, radiate most strongly in the infrared, at an
approximate wavelength 10. With this fact, PIR sensor or
motion detector is most adequate device with having least
false detection.
C. PIR Motion sensorThe purpose of motion sensor in this project was to detectany presence of human within the range of the sensor.Regarding to its name, passive infra red (PIR), infrared wasthe measuring parameter of the sensor. Infrared is the portionof the electromagnetic spectrum that falls betweenmicrowaves and visible light. The Figure 4 shows PIR Sensor.The infrared has wavelengths longer than visible light butshorter than microwaves. Humans, at normal bodytemperature, radiate most strongly in the infrared, at anapproximate wavelength 10. With this fact, PIR sensor ormotion detector is most adequate device with having leastfalse detection.
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