"基于单片机的超声波测距装置设计与实现"

Abstract: This thesis introduces a ultrasonic distance measuring device based on a single chip microcomputer. The core device in the hardware is the AT89C51 single-chip microcomputer, which also includes ultrasonic modules, display modules, and other main devices. The device is small in size, simple in structure, and cost-effective. The software is designed based on the C language, using a modular design method, consisting of main programs, delay subprograms, count subprograms, calculation subprograms, display subprograms, etc. The device achieves LCD display, with a distance measurement range of 2cm-450cm and an accuracy of 1cm, suitable for non-contact measurements in the industrial field. The study of ultrasonic distance measurement has practical significance due to its wide application in industries such as liquid level measurement, reverse radar, and obstacle avoidance for robots. Compared with traditional distance measurement methods, ultrasonic distance measurement can achieve non-contact measurement, especially in harsh environments with toxic gases or dust. It is also more cost-effective and simple in structure compared to advanced non-contact methods such as laser and radar. Therefore, this thesis provides a valuable contribution to the field of ultrasonic distance measurement on single-chip microcomputers. Keywords: AT89C51; ultrasonic; distance measurement.