Microcontroller and sensor

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Microcontroller and sensor [Copy link]

How can I use an infrared sensor to count the number of people using a microcontroller? And output the number of people on an LED display? ? Is there any relevant template program or reference:

数码小叶

Put an infrared tube at the door? ? Interrupt once: time:: time:

chunyang

Use an interception infrared sensor with appropriate channels. When a person passes by, the infrared light is intercepted once. The number of interceptions is the number of people. When programming, you need to pay attention to the "anti-shake" of the interception count, that is, when a person stands at a specific position next to the sensor, the light is constantly and quickly intercepted. This can be judged by the pulse length and interval time. The rest should be very simple.

lehuijie

But if the level of the infrared receiving tube changes for one cycle, it is judged that there is a person. However, if two people are parallel or a slightly larger object passes by, the detection will be wrong, so the detection may require multi-directional detection.