The Design for Ultrasonic Ranging System based on Bluetooth Transmission

Because of its strong signal intensity and good directivity, ultrasonic can be widely used in the field of industrial control, exploration and measurement, robot localization and security. Based on this, the ultrasonic distance measurement instrument with high precision and miniaturization character has been designed with the core of enhanced 51 microcontroller. The system is mainly composed of a main controller module, ultrasonic transmitting module, ultrasonic receiving module, Bluetooth receiving module and the display module LCD1602 module. In this paper, both the hardware circuit and the system software flow chart has been described, and the design of the system has also been tested, the results show that the ultrasonic ranging system has the advantages of high measuring precision, good accuracy, the measurement relative error is low.