基于单片机的热释电测温仪设计.doc

基于单片机的热释电温度测控仪 摘要 热释电红外测温仪是一种利用物体热释电效应而制成的新型红外测温仪器，它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。 本文详细介绍了热释电红外测温仪测温的基本原理和实现方法，以热释电红外测温仪现阶段的技术作为参考，提出并研制了一种基于ARM内核的高性能的嵌入式微处理器的热释电红外测温系统。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。文中还对影响热释电红外测温仪测温精度的因素和软硬件的相关设计做了详细的分析，并采取了相应措施，本文主要做了以下工作： 阐述了红外测温仪的发展现状和分类，并指出了本文的研究意义；阐述了热释电红外测温仪的原理，并对目前红外测温仪的几种方案的优缺点进行了详细的介绍；对ARM核微处理器作了详细的介绍，并对本文用到的ARM核芯片LPC2132的功能特点和结构做了详细的介绍;详细分析了系统的功能要求，提出了总体设计方案，并在此基础上进行了系统的硬件设计，对每个部分所完成的功能和设计思路作了说明；介绍了系统的软件设计，以流程图的方式介绍了各个功能的具体实现；对影响红外测温仪的测温误差的因素进行了分析，对系统中出现的软硬件干扰问题做了相应的抗干扰措施；为本文研究的主要结论，对系统的进一步的研究工作进行了展望。 关键词：热释电传感器，红外测温仪，ARM，LPC2132 Microcontroller-based Temperature Measurement and Control Instrument Pyroelectric ABSTRACT PIR thermometer is a kind of infrared thermometer that makes use of the pyroelectricity effect, it uses the blackbody radiation laws as the theories foundation, it is the outcome that the optical theories and micro-electronics learn 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． This paper introduces the basic principle of PIR and the method of realization in detail．With the technique that the IR thermometers present stage as a reference．It put forward and develop a kind of measure system according to the embedded microprocessor of high performance ARM．The paper introduces the composing and the method of that system in detail．and gives the hardware principle diagram and design flow chart of the software．The factors that influence PIR thermometer`s accuracy and the related interference of hardware and software are analyzed in detail, and adopted to corresponded matures．The following work is done： The present condition and classification of IR thermometer are introduced elaborately, and the meaning of this research is point out; The principle of PIR is int