P‐2.20: Hand Interaction Acquisition Technology Based on Hall Sensor

The design adopts the assistance of Hall sensor and permanent magnet to realize the capture of finger movement, which has the advantages of low cost and accurate recognition. STM32 is used as the main control module and MDK5 development platform in the design. The platform has the advantages of high integration and convenient development, and also has the characteristics of digital signal processing, high performance, real-time function, low voltage and low power consumption. A permanent magnet is designed at the center of the palm of the glove to form a constant magnetic field near the palm. The Hall sensor is a magnetic field sensor made according to the Hall effect, which can convert the magnetic field strength into a voltage signal. Through the AD conversion module built in STM32 chip, the output voltage of Hall sensor can be collected and converted into finger position and posture information through algorithm.