在机械手、行走机器人等需要进行运动控制的系统中,往往需要测距、接近和防碰传感器。本文介绍了自行设计、调试的小功率超声波测距传感器。由换能器发出间断的超声波窄脉冲同时接收由反射物体返回的反射波。在装订好声速的情况下,通过计算发送波及反射波前沿的时间差,测量运动物体相对反射物间的距离。该传感器具有简单可靠、耗能少、体积小、成本低等特点。本文给出了传感器电路组成及测试结果。 In robots, walking robots and other systems that require motion control, ranging, proximity and anti-collision sensors are often required. This article describes the self-designed, low-power ultrasonic ranging sensor debugging. A narrow ultrasonic pulse intermittently emitted by the transducer simultaneously receives reflected waves returned by the reflecting object. In the case of good binding sound velocity, the distance between the moving object and the reflector can be measured by calculating the time difference between the transmitted wave front and the reflected wave front. The sensor is simple and reliable, less energy consumption, small size, low cost and so on. This article gives the sensor circuit composition and test results.