自行车测速设计

电子信息工程论文编号:DZXX156  论文字数:10766,页数:32

目录
摘要 I
ABSTRACT II
第1章 引言 1
 1.1 背景 1
 1.2 研究内容 2
第2章 自行车测速系统概述 3
 2.1 测速的原理介绍 3
 2.1.1 转速测量传感器的介绍 3
 2.1.2转速测量的方法 5
 2.2本课题所采用的测量方法 7
第3章 自行车转速测量系统硬件设计与实现 8
 3.1 硬件电路构成及设计原理 8
 3.2硬件电路的设计 8
 3.2.1系统控制单元 8
 3.2.2 电压转换 10
 3.2.3 转速信号采集 10
 3.2.4 显示电路 11
 3.3本章小结 13
第4章 系统软件设计 14
 4.1 系统软件流程设计 14
 4.2 系统软件的实现 14
 4.2.1 定时 15
 4.2.2 计数与测速 15
 4.2.3 显示 16
第5章 系统的调试与抗干扰研究 17
 5.1系统的调试 17
 5.1.1转速测量的调试 17
 5.2系统的抗干扰措施 17
 5.2.1系统硬件抗干扰措施 17
第6章 结束语 20
 致  谢 21
参考文献 22
附录 23
附录1 源代码 23
附录2 电路图 27
附录3 系统仿真图 28
附录4 元器件清单 28
附录5 实际硬件图 29

摘要
 随着工业生产和科学技术的迅速发展，交通工具的应用在不断扩大，品种和数量也在不断增长。中国是一个自行车大国，随着人民生活水平的提高，自行车除了代步作用外，逐渐开始被人们用作健身和休闲。为了更好的了解骑行过程中的锻炼效果，自行车速的测量就成了一个比较关键的问题。一般自行车速度的测量都是通过检测转速来实现的。
 本文在对目前国内外机械的转速测量技术等进行了深入了解和分析后，以自行车为实验对象，尝试了建立通过轴转速测量而测量出自行车速度的仪器。
 首先介绍了用于机械转速测量时最常用的测量方法和使用的传感器，并对其原理、使用方法和性能进行了详细分析，由此选定了适合本课题的研究方法和传感器。
 在硬件设计方面，分别阐述分析了以AT89S52单片机为核心所构建的系统的各组成部分，包括电平转换、转速测量、结果显示等方面，并分析了各个部分的原理图的组成及其所涉及的芯片的特性。

关键词：转速测量，脉冲计频，抗干扰

ABSTRACT
 With industrial production and the rapid development of science and technology, transport applications in the expanding variety and number are also growing. China is a big country bike, with the improvement of living standards, the role of bicycles in addition to means of transport, people gradually began to be used for fitness and leisure. In order to better understand the cycle in the process of training effect, a bike-speed measurements have become a more critical issue. General bike speed are measured by detecting the speed to achieve.
 The content was based on the deep understanding of the current domestic and international machinery for the speed measurement technology. Take the bicycle to the target，I try to build the shaft rotational speed measurements to measure the speed of the bicycle equipment.
 Firstly, the content introduced mechanical speed measurements for the most commonly used measurement methods and use of sensors. What’s more? It made a detailed analysis of this topic of the principles, methods and the use of function..Which has been selected for research methods and sensors.    On the hardware design, respectively, it was analysis of a AT89S52 microcontroller as the core of the system by building various components, including level translation, speed measurement，results showed that, and so on. Meanwhile it was analyzed the various parts of the principle of the composition involved and the characteristics of the chip.     Key words: Measurement of the rotational speed ，The pulse counts the frequency ，
 Anti-disturbance