测温仪设计
29页1、非接触式红外测温仪设计摘要温度测量技术应用十分广泛,而且在现代设备故障检测领域中也是一项 非常重要的技术。但在某些应用领域中,要求测量温度用的传感器不能与被 测物体相接触,这就需要一种非接触的测温方式来满足上述测温需求。本论 文正是应上述实际需求而设计的红外测温仪。红外测温仪是以黑体辐射定律作为理论基础,是光学理论和微电子学综 合发展的产物。与传统的测温方式相比,具有响应时间短、非接触、不干扰 被测温场、使用寿命长、操作方便等一系列优点。本文介绍了红外测温仪测温的基本原理和实现方法,提出了以STC89C51单片机为其核心控制部件的红外测温系统。详细介绍了该系统的构成和实现 方式,给出了硬件原理图和软件的设计流程图。该系统主要由光学系统、光 电探测器、显示输出等部分组成。光学系统汇集其视场内目标的红外辐射能 量,红外能量聚焦在光电探测仪上并转变为相应的电信号。STC89C51单片机负责控制启动温度测量、接收测量数据、并按照单片机中的温度值计算算法 计算出目标的温度值再通过 LED把结果显示出来。关键词:STC89C51单片机,红外测温,LED显示THE DESIGN OF NON 一 C
2、ONTECT INFRAREDTHERMOMETERABSTRACTThe technology of temperature measurement is used widespread, and it also important in the modern equipment failure examination field. But in some application domains, we needn the sensor contact with the measured object which used in temperature measurement, this needs a kind of non-contact temperature measurement to satisfies the demand and the design of this infrared thermometer is also based on the demand.Infrared thermomter, it uses the blackbody radiation
3、laws as the theories foundation, it is the outcome that the optical theories and micro-electronics learn a comprehensive development. Compared to the way of traditional temperature measurement, it has a series of merits, such as short in response time, non-contact, noninterference to temperature field, long useful time and convenient operation, etc.The paper introduces the basic principle of infrared thermometer and the method of realization, puts forward infrared trermometer system with the STC
4、89C51 MCU as the CPU. The paper introduces the composing and the method of that system in detail, and gives the hardware principle diagram and the design flow chart of the software. The system formed by the optical system, photoelectron detector,display and output partially. The optical system collects the infrared radiation energy of the object in its field of view, the infrared energy focusing on the instrument and transforms to the corresponding electrical signal. The STC89C51 MCU is used to
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