声学锅炉二维温度分布测量方法及仿真分析

介绍了声学锅炉二维温度分布测量方法的基本原理。论述了一种利用信号互相关分析方法计算声波在锅炉内的传播时间,在此基础上利用最小二乘算法重建炉膛断面温度场,进行了温度场重建仿真。对声学法锅炉二维温度分布测量技术存在的一些问题进行了分析和讨论。     

渗金属气压对光电高温计测温精度影响的实验研究

为准确控制双辉等离子渗金属工件的温度,借助自制的一套热电偶测温实验装置,对光电高温计测温进行了比对实验,探讨了气压对光电高温计测温精度的影响。实验结果表明:在双辉等离子渗金属过程中,对同一工件温度,随工作气压的升高,光电高温计所用的ε值也增大。工作气压每增高5～10Pa,将ε值提高0 1,这时光电高温计的温度测量误差会小于±3℃。     

The Theoretical Analysis of Multi-wavelength Pyrometer: Check and Autosearch for Emissivity General Expression

0INTRODUCTION~nocSeveralkindsofmulti-wavelengthpyrometershavebeendesignedandwidelyusedsince19791i--11].ThegeneraleXPressionbetWeenemissivityandwavelengthmustheintroducedtOsolvetheproblemdeterminingtinetemperatureforallendssivityhehabviors.TheexpressioncannotbepredictedandtheaccuracyoftrUetemperaturecannotbeestimatedafterdatatreatmenteither.TheeXPressionsassumedforE(A)include:Wherenisthechannelnumberofthemulti--wavelengthPyrometer.C.t..['jconcludedaPessidristicviewthattheaccuracyreqUi…     

光电高温计在双辉等离子渗金属测温中的应用研究

为准确测量双辉等离子渗金属中的工件温度，借助自行研制的一套热电偶测温实验装置，采用比对实验的手段，得出了在碳钢表面常规双辉等离子渗金属过程中，准确选定光电高温计的材料发射率修正系数的方法。     

快速退火炉高温计的校温

作为半导体生产 中的一种重要设备,快速退火炉需要实现精确、可靠的温度控制。 它通常使用辐射式高温计来检测温度。在使用过程中,由于诸 多原因,需要对高温计进行校温。基于某型进口快速退火 炉,分析了其高温计的校温方法。介绍了热电偶和熔点测 试采样方法,并采用这两种方法丰富了采样数据。通过 线性计算估算了1000~1500℃范围内的校温数据;基于曲线 拟合进行了数据采样,得到了更加准确的校温结果。通过比 较,分析了两种校温方法各自的优缺点。结果表明,线性计算校温法更适 用于1100℃以下的校温;曲线拟合校温法更适用于1100℃以 上的校温。     

分光式便携比色高温计的设计

在一种新型的便携式棱镜分比色温度计中,采用成象光谱焦平面结合象差匹配技术限定工作波长和带宽,简化了仪器的结构,提高了稳定性;单片机数据采集系统的低功耗设计,不仅实现了多功能,而且用电池供电系统即可工作。     

Emissivity estimation for high temperature radiation pyrometry on Ti–6Al–4V

The paper demonstrates a versatile procedure suitable for industrial implementation of temperature measurement on a hot titanium alloy. The driving force has been the need for an accurate temperature measurement during additive manufacturing using laser welding technology where Ti–6Al–4V-wire is melted. The challenges consider both industrial constraints and the varying emissivity of the surface. Measurements makes use of a narrow bandwidth spot radiation pyrometer and a calibration procedure for estimation of the surface temperature through spectral emissivity estimation. The theoretical results are validated through experiments. A number of difficulties in radiation temperature measurements for metals with varying surface properties are discussed; especially the case of surface oxidation. The uncertainty in temperature reading due to the uncertainty in the emissivity estimate is established along with a model that qualitatively describes surface oxidation. The procedure is expected to be useful for several manufacturing applications where it is important to control high temperatures.     

一维高温温度场测试技术

研制了可对一维高温温度场进行测量的扫描式高温计．该扫描式高温计分为旋转扫描式光学系统、比色高温计和上位机三个部分．在分析温度场测量要求的基础上,推导了比色光学高温计的测量原理,建立了数学模型．基于光的反射理论,研究了旋转扫描式光学系统与一维温度场之间的运动关系．利用光学光纤将光学探头接收的光信号进行远距离传输,增加了测量的便利性和整套装置对测量环境的适应能力,专用的微型工控及控制系统提高了这套装置独立工作及与其他设备进行协调合作的能力．对比色高温计的波长函数和测量精度进行了标定,校验结果表明在800℃～3500℃范围内的测量精度为1％．最后,利用扫描式高温计对棒状碳／碳试样的轴向温度场进行了测量,通过几个固定点温度对一维温度场的测量精度进行了校验,最大测量误差为3．09％．     

Research on the Temperature and Emissivity Measurement of the Metallic Thermal Protection Blanket

The temperatures and emissivities of the metallic thermal protection blanket at (900–1,300) °C are investigated experimentally by using a multi-wavelength pyrometer. A linear relation between the emissivity and true temperature at different wavelengths is assumed. Based on this assumption, the true temperatures and spectral emissivities of the metallic thermal protection blanket at the two temperature measurement points can be calculated simultaneously. Some experimental results for the practical data processing of measurements performed on the metallic thermal protection blanket show that the difference between the calculated temperature and the temperature measured by a standard thermocouple is within  ±  10°C.     

棱镜分光式精密（标准）多波长硅光电高温计

介绍一种棱镜分光式、无干涉滤光片的多波长精密（标准）硅光电高温计。实验表明，此仪器信噪比高，稳定性好，波长选择性好，且结构紧凑，操作方便。