Trolley capable of automatically following mobile terminal to walk
A mobile terminal and automatic follow-up technology, applied in two-dimensional position/channel control and other directions, can solve problems such as easy noise, hidden safety hazards, expensive products, etc., and achieve the effect of low cost, high real-time performance, and easy shopping
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[0019] See figure 1 , The trolley that can automatically follow the mobile terminal of the present invention includes STM32F103 main control chip, electronic compass module, Bluetooth module, ultrasonic ranging sensor, DC gear motor, steering gear and LCD display. The electronic compass module and the main control chip are connected through IIC (PB8, PB9) communication, the LCD display and the main control chip are connected through SPI communication, the Bluetooth module and the main control chip are connected and communicated through the USART method, and the DC gear motor and the steering gear are It is directly connected to the main control chip through GPIO.
[0020] The main control chip is used to calculate the steering angle value of the trolley according to the position information of the trolley and the mobile terminal, and output the calculation result to the driving circuit of the steering gear, and the steering gear finally controls the steering of the...
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