说明：  超声测距作为一种非接触测量技术，因其性能好，价格低廉、使用方便，在 工业测量、车辆避障、安全预警、自动导航以及现场机器人等相关领域都有应用。
(As a non-contact ultrasonic distance measuring technology, because of its good performance, low cost, easy to use, in industrial measurement, traffic avoidance, safety warning, automatic navigation and on-site application of robotics and other relevant areas.)