红外线辐射温度计的校准

当前,红外测温仪的应用范围越来越广,测温仪的准确性关系着生活、生产,因此,测温仪的校准成为了备受关注的问题。文章从红外测温仪的工作原理出发,详细介绍了红外测温仪校准过程中的校准距离的确定、发射率的调节、数据处理等方面;针对校准过程中出现的问题,给出了解决方案;最后,从黑体辐射源与标准红外测温仪的发展方面,总结了红外测温仪校准的发展趋势。     

红外测温仪概述

本文就红外测温仪的特点、工作原理、分类、性能、选择以及使用红外测温仪主要考虑的注意事项作出简单的概述,并对红外测温仪的应用举例说明。     

环境温度对红外测温仪的影响

影响红外测温仪测量误差的闪素有很多，本文以宝安康电子（北京）有限公司TN105工业用红外测温仪为样本，探讨环境温度对红外测温仪的影响。     

红外测温仪在塑料加工中的应用

本文简单介绍了红外测温仪工作原理、特点、围内外的发展状况及红外测温仪在塑料加工中的应用过程.     

红外辐射测温仪及校准方法探讨

介绍了红外辐射测温技术的工作原理,分析了红外辐射测温仪在使用中产生测量误差的各种因素,提出了红外辐射测温仪校准方面存在的问题.     

浅析高频焊管焊接的温度测控

高频焊接温度是焊管生产的重要工艺参数,它直接关系到焊接过程是否能正常建立,并直接影响到焊缝质量。本文主要对红外测温仪运用在国产高频焊接机组上的稳定性进行研究分析,总结了红外测温仪的理论基础和基本原理,以及影响红外测温仪正常测温的各种因素。     

浅谈红外测温仪在线温度校准

本文讲述在线红外测温仪测量温度的准确与否将直接影响烟丝的内在质量,为了保证烟丝的工艺质量必须对红外测温仪进行现场校准。     

插入式红外辐射测温仪校准方法的研究

插入式红外辐射测温仪是近年来新兴的高温领域测温仪表,与热电偶相比,价格低廉、寿命长,与红外辐射测温仪相比,它可避免恶劣环境的干扰,准确度更高。对插入式红外辐射测温仪的原理结构及校准方法做了介绍和研究,有助于其在高温测量领域中的推广及应用。     

浅谈红外体温测量法

本文首先对红外测温法的原理进行了阐述;然后探讨了红外测温仪在体温测量中的应用,并介绍了目前国内常用的几种测量体温的红外测温仪,最后,分析了红外体温测量法的优缺点及其应用的前景。     

红外测温仪示值误差测量结果的不确定度评定

文章以输出为温度显示的红外测温仪为例,介绍了采用二等标准铂铑10-铂热电偶检定红外测温仪时的测量方法,分析了红外测温仪的示值误差的测量数学模型和示值误差的测量结果的不确定度来源,并计算出示值误差的测量结果的各不确定度分量和扩展不确定度。     

红外空芯光纤辐射温度计的研制及应用

为了对冲击发电机的轴套温度进行监测,设计并研制了一种新型的红外光纤辐射温度计.温度计主要由红外空芯玻璃光纤、红外探测器、放大电路及80C552单片机组成.在分析各部分实现功能的基础上,重点研究了环境温度变化对探测器的影响,并实现了数学建模.温度计的工作波长是8~14μm,测量温度范围是60~400℃,测试环境温度范围是25~60℃.利用可精确控温的实物标定炉和环境模拟箱对温度计进行了标定,测量误差小于2%.经过几个月的在线监测,取得了较好的测量结果.     

Thermal Radiative Properties and Temperature Measurement from Turbine Coatings

Recent studies have displayed the spectral radiative properties of ceramic thermal barrier coatings which are finding applications in high performance turbine engines. As a function of temperature, a region in the long wavelength infrared spectrum exhibits properties which will minimize the classical errors associated with temperature measurement by radiometric detection. Hollow sapphire waveguides transmit the portion of the long wavelength infrared spectrum which is optimum for radiometric temperature measurement from these materials, while the physical properties of the sapphire can withstand the combustion conditions within the engine. A prototype long wavelength infrared radiation thermometer was constructed to obtain surface temperature measurements from coated turbine blades subjected to high temperature combustion conditions.     

环境温度对红外辐射式体温计读数的影响

本简要介绍了所研制的红外辐射式体温计的构成及标定实验方法；研究了环境温度对体温计的影响；并在实验基础上提出了采用分段标定及对环境温度补结果进行修正的方法，提出了测量精度。     

一种根据被测对象的真实温度检定红外温度计的新方法

提出了一种检定红外温度计的新方法。应用此方法 ,检定温度计是直接对准被测对象而不是黑体。此外 ,它回避了光谱发射率的测量和温度计光谱响应度的数据。     

Linearization and stabilization of the conversion characteristics of a thermoelectric thermometer

An analysis is given of the condition of a digital thermometer utilizing thermoelectric converters (thermocouples). A method is established for digitally correcting the errors due to nonlinearity and instability of the calibration characteristic of a thermocouple by providing additional heating and cooling of its working end by passing calibrated electric current pulses through it. A microprocessor is used to process the effects on the thermocouple of the additional current, without dismantling it from its operating location, in order to correct the errors of the thermoelectric thermometer. Translated from Izmeritel'naya Tekhnika, No. 5, pp. 42–46, May, 1996.     

High-Speed Infrared Radiation Thermometry for Microscale Thermophysical Property Measurements

A new infrared radiation thermometer having a high temporal response and a high spatial resolution is being developed at NMIJ to meet the existing demand for measurements of thermophysical properties of thin films, coatings, and solids in microscale. The thermometer consists of a photovoltaic (pv)-type of mercury cadmium telluride (MCT) detector and a compact Cassegrain type of mirror optics without a mechanical chopper. The performance of the thermometer has been well characterized experimentally. Sensing infrared radiation around 10 μm of wavelength, the thermometer covers the temperature range from −50 to 150°C and has a temperature resolution better than 0.3°C at −50°C for blackbody radiators. The spatial resolution has also been checked by using a test pattern (USAF 1951) for rating the resolution of optical systems. Temperature changes of specimen surfaces in periodic heating with a laser beam modulated above 100 kHz have been observed successfully with the thermometer. The results shows that the thermometer has great potential for measuring the thermal diffusivity, thermal conductivity, and specific heat capacity of microscale substances at low temperatures based on the periodic heating and pulsed laser heating methods. Paper presented at the Fifteenth Symposium on Thermophysical Properties, June 22–27, 2003, Boulder, Colorado, U.S.A.     

Integrated Thin-Film dc RSQUIDs for Noise Thermometry

Integrated thin-film dc RSQUIDs (Resistive Superconducting QUantum Interference Devices) have been developed that significantly simplify noise thermometer operation. We show theoretically that the main equations for noise thermometry deduced for rf RSQUIDs can also be applied to dc RSQUIDs. Our dc RSQUIDs can at least be operated down to 0.04 K. Between 0.14 and 5.9 K the measured noise temperature agrees with the temperature of calibrated reference thermometers. We investigate the errors and uncertainties of a dc RSQUID noise thermometer, in particular errors due to excess noise. A model for excess noise and its impact on the noise temperature is presented and shown to be in agreement with the measurements.     

铁电薄膜的制备及应用技术研究

研究出具有特色的制备铁电薄膜的 sol-gel技术;制备出高质量、高可靠的 PLT、PZT、PYZT、BST”l、PbTiO3、BaTiO3、Bi4Ti3O12多晶铁电薄膜,PLT、PZT和伽里O3异质外延生长铁电薄膜;研制出铁电薄膜热释电单元红外传感器,8元、9元、1O元线列和8X8元阵列;研制出热释电火情探测器和热释电非接触式温度测试仪。     

A Vacuum Infrared Standard Radiation Thermometer at the PTB

A thermal infrared radiation thermometer was jointly developed by the Physikalisch-Technische Bundesanstalt and Raytek GmbH for temperature measurements from − 150°C to 170°C under vacuum. The radiation thermometer is a purpose-built instrument to be operated with the PTB reduced-background infrared calibration facility. The instrument is a stand-alone system with an airtight housing that allows operation inside a vacuum chamber, attached to a vacuum chamber, and in air. The radiation thermometer will serve to calibrate thermal radiation sources, i.e., blackbody radiators, by comparing their radiance temperature to that of a variable-temperature reference blackbody inside the reduced-background calibration facility. Furthermore, since it can be operated under vacuum and in air, the instrument also allows the water- and ammonia-heat-pipe reference blackbodies of the PTB low-temperature calibration facility operated in air to be compared with the variable-temperature blackbody operated under vacuum. Finally, provided that sufficient long-term stability is achieved, the instrument shall be used as a transfer radiation thermometer to carry and compare the temperature scale of PTB by means of radiation thermometry to remote-sensing calibration facilities outside PTB. The mechanical, optical, and electrical designs of the instrument are reported. Results of investigations on the temperature resolution, size-of-source effect, and the reference function are given. The heat-pipe blackbodies operating in air are compared to the variable-temperature blackbody operated under vacuum by using the vacuum radiation thermometer. References to commercial products are provided for identification purposes only and constitute neither endorsement nor representation that the item identified is the best available for the stated purpose.     

Measurements of absolute temperature below 0.75 K using a Josephson-junction noise thermometer

In order to extend the international temperature scale of 1990, ITS-90, below its lower limit of 0.65 K, we have developed a temperature scale ranging from 6 to 750 mK. Values of absolute temperature are defined on this scale by an R-SQUID noise thermometer. A review is given here of the decade of our experience in the operation of this thermometer and in modeling its systematic errors. The reproducibility of noise temperature values was assessed using superconductive fixed points and the melting curve of³He. To assess the accuracy of the noise thermometer, it was compared with another absolute thermometer (based on nuclear orientation) at the lowest temperatures and with an internationally recognized scale above 0.5 K. The noise thermometer temperatures were used to calibrate two paramagnetic salt thermometers, the result being the construction of a temperature scale that is smooth to approximately 0.01%. On the basis of these comparisons, temperature values defined by the R-SQUID are deemed to be reproducible to within 0.1% and accurate to within 0.3%.Retired.