Design of Intelligent Supermarket Service Robot Based on Raspberry Pi

In this paper, an intelligent supermarket service robot with the functions of speech recognition, intelligent following, voice interaction and automatic payment is realized. It is a 1:20 intelligent robot model, in which Raspberry Pi 4B is the main controller responsible for complex digital image processing and STM32F103RCT6 microcontroller is the auxiliary controller responsible for robot movement, obstacle avoidance and communication. The system uses camera to capture video, and realizes object tracking and commodity QR code recognition through OpenCV image recognition technology. Baidu AI is used for speech recognition and speech synthesis to achieve voice interaction with customers. The robot can also be controlled by APP through Bluetooth communication, and obstacle avoidance can be realized through ultrasonic module. The robot recognizes the QR code of goods, calculates the total price of goods, and generates the payment QR code for customers to realize automatic payment.