红外温度计.doc

2016届本科毕业设计 基于单片机的红外人体温度检测装置设计 院 （系） 名 称 物理与电子信息学院 专 业 名 称 电子信息科学与技术 学 生 姓 名 ==== 学 号 ====== 指 导 教 师 ====== 完 成 时 间 2016年5月6日 基于单片机的红外人体温度检测装置设计 ===== ======== 指导教师：====== 摘 要关键词Design of Infrared Human Body Temperature Detection Device Based on Single Chip Microcomputer ===== ==== =================== ================ Abstract: In order to solve the problem of traditional temperature measurement speed slow and difficult to use in high population density, this paper introduces the design of a fast infrared human body temperature detection device, the device using non-contact measurement method, can quickly and accurately measure the temperature of the human body, and on individual body temperature anomalies with identification and alarm function. The measuring device mainly comprises an infrared sensor, an analog digital conversion circuit, a signal analysis and processing circuit, a digital tube display circuit and an abnormal alarm system. This design under the control of AT89C51. First of all, the tps334 infrared temperature sensor to detect the human body temperature, then choose the AD7705 digital to analog conversion, and then the signal processing method for measuring, finally through the LCD intuitive display output data, perform the measurement task. The experiment shows that the system can realize non contact human body temperature measurement and abnormal alarm function, and has the characteristics of high temperature measurement speed, high sensitivity, convenient operation and so on, it has certain application value. Keywords: Infrared Temperature Sensor; Fast Check; A/D Switch; Decoding Display; Exceeded Alarm 目录 1 引言 1 1.1 研究背景 1 1.2 基于单片机的红外快速人体温度检测装置的研究意义 1 1.3 本文主要研究内容 2 2 基于单片机的红外快速人体温度检测装置的设计框架 2 2.1 设计思路 2 2.2 方案比较 2 2.3 利用红外测温的优点 4 3 红外测温系统设计与工作原理 5 3.1 红外测温系统组成 5 3.2 单元电路的设计 5 3.2.1 传感器选用 5 3.2.2 信号处理电路设计 6 3.2.3 译码显示电路设计 14 3.2.4 报警电路 15 3.2.5 电源电路的设计 16 3.3 系统的工作原理