Ultrasonic range finder

   Since ultrasonic ranging is a non-contact detection technology, it is not affected by light, color of the object being measured, etc. It is more hygienic than other instruments and more resistant to harsh environments such as moisture, dust, high temperature, corrosive gases, etc. It has low maintenance and no pollution. , high reliability, long life and other characteristics.

   This design includes two parts: hardware and software design. The module is divided into sub-modules such as data acquisition, button control, four-digit digital tube display, and alarm. The circuit structure can be divided into: ultrasonic sensor , buzzer , and microcontroller control circuit. As far as the core module of this design is concerned, the microcontroller is the central unit of the design, so this system is also an application of the microcontroller application system. The microcontroller application system also consists of hardware and software. Hardware includes systems composed of microcontrollers, input/output devices, and peripheral application circuits. Software is the general term for various working programs. The development process of a single-chip microcomputer application system includes several stages such as overall design, hardware design, and software design. The system uses STC89C52 microcontroller as the core control unit . When the measured distance is less than the set distance, the main control chip compares the measured value with the set value. Then control the buzzer alarm.