自校验红外辐射温度计的研制

发布时间：2019-04-20 10:42

【摘要】：在科学实验、工农业生产和生活学习中温度这一物理量扮演着重要的角色。在一些特殊条件的场所,测温的相关问题就成为了关键性的问题。就温度计或温度传感器与被测温场间的相关性来说,可以将温度测量法分成接触和非接触这两类测温方法。非接触测温在很多方面都优于接触测温。非接触测温法具有不接触受测对象、较快响应、测量区间宽和对受测对象温场不产生影响等优点。非接触测温法中的辐射测温法是一种十分关键的测温法,其较为常用的仪器是辐射温度计。利用这种测温方式可以不干扰被测温场,不影响温场分布。但是传统非接触测温会存在操作不方便,探测器响应时间久等不足。因此,本论文针对上述不足设计了一种简单、便捷的非接触测温装置。首先,利用辐射测温的原理为依据,对辐射温度计进行相应设计。其次,通过利用TracePro软件对装置进行模拟,并对光学系统设计的可信性进行验证,极大的提高了设计的测温装置的可信度。最后进行自校验,在提高测温装置便携性的同时,保证了测量结果的准确性。针对上述说明,本论文主要研究内容如下:对8到14μm工作波段的红外辐射温度计的实验光学系统展开设计,在探究分析已存辐射温度计光学系统构造的前提下,将本次课题中使用的辐射测温光学系统设计出来,对光学系统中的结构元件进行了简化,方便组装实验装备,控制实验中的客观变量和调控实验光路,构建实验平台。研究结果表明,在通过初期性能测试后,该系统结构达到设计要求,在测温时,使用氟利昂热管黑体辐射源,测量获得的黑体辐射源温度稳定性和均匀性优于0.2℃。当黑体辐射源稳定控制在34℃,38℃、42℃时,所设计的辐射温度计样机可以正常工作。通过实时单点修正的方法,测得示值误差为0.68℃,对红外辐射温度计中的示值漂移消除,实现自行校验。
[Abstract]:Temperature plays an important role in scientific experiments, industrial and agricultural production and life learning. In some places with special conditions, the related problems of temperature measurement have become the key problems. As far as the correlation between the thermometer or temperature sensor and the measured temperature field is concerned, the temperature measurement method can be divided into two kinds of temperature measurement methods: contact method and non-contact method. Non-contact temperature measurement is superior to contact temperature measurement in many aspects. The non-contact temperature measurement method has the advantages of non-contact, fast response, wide measurement interval and no influence on the temperature field of the measured object. The radiation thermometer is one of the most important methods in the non-contact temperature measurement, and the most commonly used instrument is the radiation thermometer. This temperature measurement method can not interfere with the measured temperature field and do not affect the distribution of the temperature field. However, the traditional non-contact temperature measurement has some disadvantages, such as inconvenient operation, long response time and so on. Therefore, a simple and convenient non-contact temperature measuring device is designed in this paper. Firstly, based on the principle of radiation temperature measurement, the corresponding design of radiation thermometer is carried out. Secondly, by using TracePro software to simulate the device and verify the reliability of the optical system design, the reliability of the designed temperature measurement device is greatly improved. Finally, self-calibration is carried out to improve the portability of the temperature measurement device and ensure the accuracy of the measurement results. In view of the above explanation, the main research contents of this thesis are as follows: the experimental optical system of infrared radiation thermometers operating at 8 to 14 渭 m is designed, and on the premise of exploring and analyzing the structure of the existing radiation thermometers, the optical system of infrared radiation thermometers is designed. The optical system of radiation temperature measurement used in this paper is designed to simplify the structural elements of the optical system, to assemble the experimental equipment conveniently, to control the objective variables in the experiment and to control the optical path of the experiment, and to construct the experimental platform. The results show that after the initial performance test, the structure of the system meets the design requirements. When using Freon heat pipe blackbody radiation source, the temperature stability and uniformity of the blackbody radiation source obtained from the measurement are better than 0.2 鈩，

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