Security protection system based on magnetic sensor
A magnetic sensor and security system technology, applied in the direction of electric alarm, open alarm, anti-theft alarm mechanical activation, etc., can solve problems such as alarm failure, and achieve strong adaptability, low power consumption, and strong stability. Effect
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[0017] Embodiment: The magnetic sensor adopts MMC2120, the microprocessor adopts STM32, and the wireless module adopts nRF24L01. Powered by lithium battery.
[0018] The acquisition end is a patch with a size of about 35mm*25mm*5mm, which can be attached to the door or built into the object to be detected. The PCB inside the patch integrates MMC2120 magnetic field sensor, STM32 microprocessor, and nRF24L01 wireless transmission module. Stick the magnetic signal detection terminal on the edge of the door, preferably on the top of the door, and then power on. Afterwards, the monitor can hold the alarm terminal and observe the alarm indicator [ figure 2 Mark 7], or listen to the buzzer alarm sound, to monitor whether the door is opened.
[0019] Gently shake the door with your hand, you can observe the flashing indicator light on the alarm terminal, and hear the alarm sound of "Dididi" from the buzzer.
[0020] Acquisition of magnetic field signals:
[0021] Give the magnet...
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