The passive infrared sensor (PIR sensor) can detect whether a human being or homeothermic animal passes by.
Working principle
The PIR sensor uses a human pyroelectric infrared sensor as a core component. The normal temperature of a human body is 37 °C, corresponding to the infrared light of 10 μm in wavelength. The PIR sensor detects the movement of a human body or heat source nearby by detecting the change of the infrared light of 10 μm in wavelength.
To sensitively detect the change of the 10 μm infrared light, the PIR sensor uses a Fresnel filter to concentrate the infrared light so that the sensor can receive as much infrared light as possible in the environment.
Real-life example
- A shopping mall uses a PIR sensor on its automatic door to determine whether to open or close the door.
Specifications
- Dimensions: 24 × 20 (mm)
- Detection range: 3–5 (m)
- Detection angle range at the x-axis: 80 degrees
- Detection angle range at the y-axis: 55 degrees
- Operating duration after being triggered: 3s
- Operating current: 15 mA
Comments
Hi, I'm trying to teach how to use the passive IR detector add on and can't find any support on how to set up the blocks?
Hi, right-click on the boolean block of the PIR, then click help. It will show a basic example how to set up the blocks.
I don't have the PIR blocks and don't see them in extensions on https://ide.mblock.cc/. Can you direct where to find the blocks?
TIA
The extensions are available through HaloCode controller or CyberPi. Which controller are you using?
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