基于AT89C51单片机超声波测距仪设计VIP免费

- 1 - 基于 AT89C51单片机的超声波测距仪的设计【摘要】 AT89C51 是一个低功耗，高性能 CMOS 8 位单片机，片内含 4k Bytes ISP(In-system programmable) 的可反复擦写 10000 次的 Flash 只读程序存储器，器件采用ATMEL公司的高密度、非易失性存储技术制造，兼容标准MCS-51指令系统及 80C51引脚结构，芯片内集成了通用 8 位中央处理器和 ISP Flash 存储单元， AT89C51在众多嵌入式控制应用系统中得到广泛应用。 这次设计主要是利用AT89C51单片机、HC-SR04超声波传感器、蜂鸣器完成测距报警系统的制作，将 AT89C51作为主控制芯片， 利用超声波对物体的感应，将前方物体的距离探测出来，然后单片机处理运算， 与设定的报警距离值进行比较判断，当测得距离小于设定值时，AT89C51发出指令控制蜂鸣器报警。【关键词 】： AT89C51单片机、 HC-SR04超声波传感器、蜂鸣器ABSTRACT AT89C51 is a low power consumption, high performance CMOS 8-bit microcontroller, tablet containing 4 k Bytes of ISP (In system programmable) can wipe again and again 1000 times of Flash memory read-only applications, device adopts high density of ATMEL company, nonvolatile storage technology, compatible with standard MCS - 51 structure, instruction system and 80 c51 pin chip integrates general 8-bit CPU and ISP Flash memory cell, AT89C51 is widely applied In many embedded control applications.This design is mainly made using AT89C51 SCM, HC-SR04 ultrasonic sensor, buzzer completed ranging alarm system,the AT89C51 as the main control chip,the use of ultrasonic sensing of object ,the detected objects in front of the distance,then the MCU processing operations,and the set alarm distance to compare the value of judgment,when the measuring distance is smaller than the set value,AT89C51 sends out a command to control the buzzer alarm. 【KEY WORDS】: AT89C51 Single chip microcomputer 、HC-SR04 ultrasonic sensor 、- 2 - Buzzer 目录一、绪论 ...............................................