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We designed a child multi-function health detector, the design based on STM32F103 core chip for information processing core, mainly including body temperature module, heart rate and blood pressure module, button module, OLED display module, alarm module. The body temperature module uses the MLX90614 infrared temperature measurement sensor to collect the human body temperature, After magnifying the weak temperature signal collected by the amplification circuit, After conversion from ADC0832 chip to STM32F103 MCU, After processing, display the body temperature information on the OLED display screen, Heart rate blood pressure module collection using MKB0805 pulse blood pressure sensor body heart rate value and blood pressure value, After filtering out the high-frequency noise signal, The weak heart rate signal and weak blood pressure signal for amplified transmission STM32F103 microcontroller, The microcontroller processes the heart rate values and blood pressure values and displays them on the OLED display screen. The key module has three keys: select the key, determine the key and return to the key. Select the key to select the measurement function, such as measuring temperature, heart rate and blood pressure; determine the key to determine the measurement function, and enter the index measurement display interface; return to the key to return to the previous function interface. The alarm module uses buzzer and LED to alert the user of the current measurement indicators. The results detected by the children's multifunctional health detector can be used for parents to understand and better promote their children's health. Through the application of intelligent technology, corresponding solutions can be put forward for different children. The school can also query the physical condition of each student through the mobile phone client, and screen according to the relevant supplementary trace element ingredients recommended on the client, so as to add scientific meals for children.
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