高精度超声波液位测量系统的设计与实现

摘要

To solve the problem of higher power consumption and lower accuracy in the existing measuring system,ultrasonic liquid level measuring system based on MSP430F149 was introduced.The system realized the design of hardware circuit and software algorithm,and it has the advantage of low power consumption and high measure accuracy.This paper focused on the system configuration,the design method to improve the accuracy and the experimental results.Experimental results show that the measured data is accurate between 20 cm and 1 500 cm and precision can reach 2 mm in the empty laboratory with the temperature of 25 ℃.Compared with other designs,this system has higher accuracy,reliability,practicability,so it can be better used in the industrial field.%文中针对现有的液位测量系统功耗较大、精度有待提高等问题,设计了一种基于MSP430F149单片机的高精度低功耗超声波液位测量系统.该系统实现了硬件电路的设计和软件算法的开发.文中重点分析了系统组成、提高精确度的设计方法和实验结果.实验表明:在环境温度为25℃的空旷实验室内,该系统测量范围为20～1 500 cm,测量精确度可达2 mm.相比于其他设计,该系统有更高的精确度,并且有较高的可靠性和实用性,可以更好地满足各种工业现场的需求.