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立定跳远是学生体育达标和升学体育考试中必须测试的项目,学生人数众多,评判工作量大,为了进行合理和公正地评判,立定跳远自动测距仪是必可缺少的测量评判仪器.为了减轻立定跳远测试工作中裁判的工作量,提高测试工作的效率,本文采用现代化的嵌入式计算机技术设计了立定跳远自动测距仪.软件部分设计采用的模块化的设计,使用C语言,Keil C51编译.该立定跳远测距仪实现了测试成绩的实时显示和犯规提醒,测量精度为1cm.“,”The automatic range finder of standing long jump is designed for PE qualification test and entrance PE examination in schools, application of which can greatly improve the accuracy of the test result and working efficiency of the test, and consequently reduce the manual work of the judge. It realizes automatic measuring of the jumping distance, real-time display of the test result and alarming for the foul action and the measuring accuracy reaches lcm. The software of the system adopts modular design, is written in C language and compiled by Keil C51.