基于AT89S52的汽车测速与倒车提示模拟系统的设计

发布时间：2018-03-29 05:17

本文选题：AT89S52　切入点：CX20106A　出处：《南昌大学》2012年硕士论文

【摘要】：AT89S52是美国ATMEL公司生产的低电压,高性能CMOS8位单片机,片内含4Kbytes的快速可擦写的只读程序存储器(PEROM)和128bytes的随机存取数据存储器(RAM),片内置通用8位中央处理器(CPU)和flash存储单元,功能强大的AT89S52单片机可提供许多高性价比的应用场合,可灵活应用于各种控制领域。本论文利用单片机AT89S52作为控制器,基于超声波测距原理和光电码盘测转速的原理,设计了一个模拟汽车测速与倒车提示的电路,并编写了对应的测速、测距等程序。论文作者主要完成的工作包括： (1)调研了国内外汽车测速和倒车雷达现状以及发展情况,提出了汽车测速与倒车提示模拟电路的总体设计方案。 (2)研究了单片机AT89S52的电路结构、引脚功能和工作原理,设计了基于单片机AT89S52的汽车测速与倒车提示模拟电路的控制电路。 (3)分析了CX20106A芯片的结构与特点,并在研究了超声波测距原理的基础上提出了超声波测距电路的设计方案,设计了基于CD4069和CX20106A的超声波发射与接收电路。 (4)介绍了光电码盘测速法,提出了利用光电码盘进行转速测量的设计方案,设计了基于槽型光电传感器的转速检测电路。 (5)利用电子产品开发系统Altium Designer和Electronics Workbench两款软件进行电路设计与仿真,利用实验电路和示波器进行数据测量和分析。
[Abstract]:AT89S52 is a low voltage, high performance CMOS8 single chip microcomputer produced by ATMEL Company of USA. The chip contains 4Kbytes's fast erasable read-only program memory (PEROM) and 128bytes's random access data memory (RAM). The chip has a universal 8-bit CPU) and a flash memory cell. The powerful AT89S52 microcontroller can provide many applications with high performance and price ratio, and can be used flexibly in various control fields. In this paper, based on the principle of ultrasonic ranging and the principle of measuring rotational speed of photoelectric code disk, a circuit is designed to simulate vehicle speed measurement and reverse indication, and the corresponding speed measurement is compiled. The main work accomplished by the author of the thesis includes:. 1) the present situation and development of vehicle speed measurement and reversing radar at home and abroad are investigated, and the overall design scheme of the analog circuit for vehicle speed measurement and reverse warning is put forward. In this paper, the circuit structure, pin function and working principle of single chip computer AT89S52 are studied, and the control circuit of automobile speed measurement and reverse warning analog circuit based on single chip computer AT89S52 is designed. In this paper, the structure and characteristics of CX20106A chip are analyzed, and the design scheme of ultrasonic ranging circuit is put forward on the basis of studying the principle of ultrasonic ranging. The ultrasonic transmitting and receiving circuit based on CD4069 and CX20106A is designed. This paper introduces the method of measuring the speed of the photoelectric code disk, puts forward the design scheme of measuring the rotational speed by using the photoelectric code disk, and designs the speed measuring circuit based on the slot photoelectric sensor. The electronic product development system Altium Designer and Electronics Workbench are used to design and simulate the circuit, and the experimental circuit and oscilloscope are used to measure and analyze the data.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.12

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