智能型BMI体重指数测试仪的设计与制作毕业设计重点解读.doc

本科毕业设计 （2012届） 题 目 智能型BMI体重指数测试仪的设计与制作 学 院 专 业 班 级 学 号 学生姓名 指导教师 完成日期 诚 信 承 诺 我谨在此承诺：本人所写的毕业论文《智能型BMI体重指数测试仪的设计与制作》均系本人独立完成，没有抄袭行为，凡涉及其他作者的观点和材料，均作了注释，若有不实，后果由本人承担。 承诺人（签名）： 2012 年 05 月 09日 摘 要 本设计主要设计BMI（Body Mass Index，身体质量指数STC12C5A16S2控制单元，由电阻式应变片获取电信号，经AD620放大器、按键、显示模块以及软件程序来完成整个称重系统。本设计运用LCD1602液晶分两行显示采集到体重值，用户输入的身高值和经系统处理过的BMI值和用户的身体质量STC12C5A16S2；称重传感器；AD620 ABSTRACT This design mainly the design signal processing system of BMI weight tester, then realize the entire BMI weight test. BMI weight tester system mainly including weighing transducer, amplifiers, signal processing and liquid crystal display is the key to the whole system. BMI test process: from sensors to collect the electrical signals, after a series of signal processing and input height value, by BMI = weight (kg) / (height ^ 2) get the final outcome. The whole bridge weighing transducers composition of two 50kg half bridge weighing transducers and its range is weighing 100kg. BMI eventually is decided by the collected weight and the height of the user. The BMI weight tester system is mainly composed of taking A/D conversion function of the single chip microcomputer STC12C5A16S2 control units, by the resistance strain gauge type for electrical signal ,through the process of amplifier AD620, buttons, display module and software program to complete the whole weighing system. This design uses LCD1602 to display the collected weight value, the user input height value and the system with the body mass index (BMI) and the users healthy condition .the intuitive and easy to read characteristics will be lively loved by users. Obviously the single-chip microcomputer control weight scales have characteristics of conveniently use, intuitive, high measurement accuracy, low cost etc. In addition, in modern society with the improvement of peoples living standard, people take more and more attention on their health