说明：  随着科技的发展，运用超声波作出精确测量已经成为可能，由于超声波测距是一种非接触检测技术，可以运用各种环境中，较其他仪器更加卫生，更耐潮湿、粉尘、高温、腐蚀气体等恶劣环境。该智能超声波测距系统分为超声波测距部分，显示部分，主控部分，语音芯片（1）超声波测距主要用超声波模块，传回来的数据给单片机处理。（2）显示部分由lcd显示（3）主控部分主要由51单片机及其外围电路组成。（4）语音芯片主要单片机控制芯片发声。本系统设计完毕后能够实现以下功能。1）lcd即时显示当前距离值。2）距离值可以精确到厘米。3)播放其测得的距离值
(With the development of science and technology, the use of ultrasound to make precise measurements have become possible due to the ultrasonic distance measurement is a non-contact detection technology that can use a variety of environments, more hygienic than other instruments, and more resistant to moisture, dust, high temperature, corrosive gas and other harsh environments. The intelligent ultrasonic ranging system consists of ultrasonic distance measurement section, a display section, main section, voice chip (1) is mainly used ultrasonic ultrasonic ranging module, transmit the data back to the microcontroller processing. (2) display part by the lcd display (3) main part consists of 51 single-chip and its peripheral circuit. (4) voice sound chip main control chip microcontroller. The system design has been completed to achieve the following functions. 1) lcd instantly displays the current distance value. 2) The distance value can be accurate to centimeters. 3) play its measured dist)