基于AT89C51的立定跳远测距系统设计_毕业设计论文.doc

毕业设计说明书 基于AT89C51的立定跳远 测距系统设计 清华大学2012届毕业设计说明书 基于AT89C51的立定跳远测距系统设计 摘 要 广大青少年身心健康、体魄强健、意志坚强、充满活力，是一个民族旺盛生命力的体现，是社会文明进步的标志，是国家综合实力的重要方面。随着中华人民共和国《学生体质健康标准》的颁布实施，开发智能化体质测试系统用于检测大中小学生的身体健康状况已经成为当务之急。 立定跳远测距系统是智能化体质测试系统系列产品之一，该系统将计算机软硬件技术溶为一体，技术含量高。在研究参考国内外现有立定跳远测距仪的基础上，充分利用现代电子、计算机、红外线传感测控等方面的技术成果，开发了新一代基于红外线发光二极管和单片机的立定跳远测距系统。 本文所论述的立定跳远测距系统采用计算机显示，可根据不同被测对象选择不同的起跳点，性能稳定，精度较高。系统实用、缓冲性能和附着地面性能优良。 本文所论述的立定跳远测距系统是以单片机AT89C51为核心部件的工作系统。用Altium Designer软件完成硬件设计的基础上，确定C语言为编程语言，确定了系统软件的总体结构，设计了主程序流程图，通过C语言编制的软件程序支持，能够实现对被测者所跳距离的处理、运算，从而实现测量。同时，本文对单片机AT89C51与PC机之间进行通讯、实施PC机控制的工作做了一定的研究和探讨。 关键词：立定跳远测距系统，红外线传感测控，单片机 The Research and Development of Advanced Standing Abstract Masses of adolescent physical and mental health, body robust, strong will, full of vitality, is the embodiment of a nation strong vitality, is a symbol of social civilization and progress, are important aspects of the comprehensive national strength.With the promulgation and actualization of The Health Stalldard for Students Physical Constitution of the Peoples Republic of China,it has become a pressing obligation to develop the Intelligent Testing System for Physical Constitution Measurement. The advanced standing long jump range finderis one of the series of products of The Intelligent IC Card Testing System for Physical Constitution Measurement.This device is a high technical product which is the combination of computer hardware and software.Under the study of the standing long jump range finder at home and abroad,an advanced standing long jump range finder that based on infrared LED and SCM (Single Chip Microprocessor) is developed,which takes advantages of the technology process in the fields such as electronic,computer,sensor and controlling. The standing long jump range finder discussed in this paper uses the PC to show the testing data.Different jumping-off points can be chosen for different people.It has stable capability and high precession.The measure error is less than one centimeter.Its prac