在STC系列单片机中STC98C52因其多功能性与实用性，备受好评，被

在STC系列单片机中STC98C52因其多功能性与实用性，备受好评，被广大电子设计爱好者所推崇并得到了广泛应用。本次实验的测距仪系统主要由HC-SR04超声波传感器与STC89C52单片机来实现。其原理是：通过对主控制器STC89C52进行警报距离值的设定，然后将这一设定值与由超声波传感器测得的与前方物体之间的距离作比较，再进行相应的处理、判断、比较。若最后蜂鸣器因受到主控制器的控制发出蜂鸣，则说明测量得到的距离值比设定的值要小。采用超声波测距具有以下优点：能够方便、快速、简单的测得距离；较轻松的实现了对实验数据的实时检测和控制。通过基于单片机的超声测距仪的设计，加深了我对单片机原理与在实践中应用的理解。本次实验中实现了整个超声波测距仪的设计，其中包含了超声波发射电路、数字显示电路、单片机主控制电路和接收电路，并且附加了一个报警电路。

在STC系列单片机中STC98C52因其多功能性与实用性，备受好评，被广大电子设计爱好者所推崇并得到了广泛应用。 本次实验的测距仪系统主要由HC-SR04超声波传感器与STC89C52单片机来实现。 其原理是：通过对主控制器STC89C52进行警报距离值的设定，然后将这一设定值与由超声波传感器测得的与前方物体之间的距离作比较，再进行相应的处理、判断、比较。 若最后蜂鸣器因受到主控制器的控制发出蜂鸣，则说明测量得到的距离值比设定的值要小。 采用超声波测距具有以下优点：能够方便、快速、简单的测得距离；较轻松的实现了对实验数据的实时检测和控制。 通过基于单片机的超声测距仪的设计，加深了我对单片机原理与在实践中应用的理解。 本次实验中实现了整个超声波测距仪的设计，其中包含了超声波发射电路、数字显示电路、单片机主控制电路和接收电路，并且附加了一个报警电路。

Stc98c52, one of the STC series single-chip computers, is highly praised for its multi-function and practicability, and widely used by the electronic design enthusiasts. The ranging system of this experiment is mainly realized by hc-sr04 ultrasonic sensor and STC89C52 single chip microcomputer. The principle is: set the alarm distance value of the main controller STC89C52, then compare the set value with the distance between the object measured by the ultrasonic sensor and the object in front, and then carry out the corresponding processing, judgment and comparison. If the final buzzer beeps due to the control of the main controller, it means that the measured distance value is smaller than the set value. Using ultrasonic distance measurement has the following advantages: it can measure the distance conveniently, quickly and simply; it can easily realize the real-time detection and control of the experimental data. Through the design of ultrasonic rangefinder based on single-chip microcomputer, I have deepened my understanding of the principle of single-chip microcomputer and its application in practice. In this experiment, the design of the whole ultrasonic rangefinder is realized, which includes the ultrasonic transmitting circuit, digital display circuit, MCU main control circuit and receiving circuit, and an alarm circuit is added.<br>