硬质合金磨削温度的实验研究

采用半人工和人工热电偶法，对硬质合金YG6和YT30平面磨削的磨削温度进行了实验研究。并对磨削参数与磨削温度的关系，进行了理论分析及实验验证。结果表明：磨削深度和工作台速度增加，磨削温度升高，但工作台速度的改变，对磨削温度的影响较小．     

Experimental and numerical studies on the determination of twist drill temperature in dry drilling: A new approach

In this paper, the influences of the spindle speed and feed rate on the drill temperature responses have been investigated. A new experimental approach was developed to measure drill temperature in drilling process. Drill temperatures were measured by inserting standard thermocouples through the coolant (oil) hole of TiAlN-coated carbide drills. Experimental parameters used in the study has based on Taguchi’s method. Experimental study was conducted by using two different workpiece materials, AISI 1040 steel and Al 7075-T651. The drill bit temperature was predicted using a numerical calculation with Third Wave AdvantEdge^TM Lagrangian based on explicit finite element analysis software. The results obtained from experimental study and finite element analyses (FEA) were compared. Good agreement between the measured and analyzed temperature results was found in dry drilling process.     

工业热电偶、热电阻自动检定装置

将传统的手动热电偶、热电阻检定装置改进为自动检定装置，实现了自动连续检定。     

实验用热电偶校验系统的改造

由于实验教学的需要,笔者提出热电偶校验系统的改造方案,并承担改造过程中有关软件的编制。系统的改造把仪表校验和计算机应用结合起来,改造成本较低,改造后的系统界面友好,使用方便。     

An improved two-colour pyrometer based method for measuring dynamic temperature mapping of hydrogen-air combustion

To solve the problem of measuring the combustion temperature of hydrogen gas, an improved two-colour pyrometer with suspended tungsten powder was developed and calibrated by a tungsten halogen lamp. The characteristic temperature parameters of the premixed 30% H₂/70% air flame, including temperature distribution, proportion, maximum value, minimum value, and average value, could be measured and calculated using the improved two-colour pyrometer method and a python code. The temperature measuring results of H₂-air mixture obtained by this technique were compared with that of thermocouples and previous studies. The results verified its feasibility to measure the flame temperature structure of H₂ combustion. Future work concerning the influential factors of the improved two-colour pyrometer was also mentioned.     

Temperature control system for laser heating: Application for minute asteroidal materials

A temperature control system for a laser heating has been developed to extract noble gases from minute material samples recovered from the asteroid Itokawa by the Hayabusa spacecraft. An ultra-fine thermocouple was produced from 3% Re–W and 26% Re–W wires 25 μm in diameter, and its electromotive force was calibrated. A temperature control program was originally produced using LabVIEW 2011 in which proportional-integral-derivative (PID) control was not adopted as an algorithm of the program. Particle samples smaller than 60 μm in diameter were set in conical depressions in a sample holder made of fused silica and irradiated by a slightly defocused Nd-YAG laser. The temperature of the samples was recorded by the thermocouple that passed through a small hole 50 μm in diameter because the sample and the thermocouple always came into contact during laser heating. The program controlled the temperature of the tiny samples appropriately. The average temperature during heating was slightly lower than the setting temperature and the standard deviation and the maximum overshoot were lower than 2.5% and 6.0% of the setting temperature, respectively. The performance of the temperature control system is high enough to conduct the stepwise heating experiment for minute extraterrestrial material samples.     

热电偶测温原理中的基本定律

阐述均质导体、中间导体和中间温度3定律的基本理论和其应用。     

Calibration of dynamic tool–workpiece interface temperature measurement during friction stir welding

The objective of this work is to accurately measure the transient temperatures at the tool–workpiece interface during friction stir welding (FSW) using thermocouples that are embedded in the tool. Temperature sensors embedded in the friction stir (FS) tool provide a non-consumable localized temperature measurement capability that is crucial for process research, development, and control. A modification of the ASTM E-1461 standard for measuring thermal diffusivity with pulses of heat flux is proposed for calibrating the transient response of temperature sensors located near the surface of the FS tool. These tests enable the calculation of each sensor’s time constant, which are used in one-dimensional analytical models of the dynamic response to calculate the true interface temperature. Time constants between 21 and 43 ms are measured for 0.25-mm-diameter, sheathed thermocouples located at the FS tool surface.     

Novel temperature measurement method & thermodynamic investigations of amorphous polymers during high rate deformation

Polymers are frequently used in applications in which they may be exposed to high rate or impact loading, and there is growing industrial importance in understanding their mechanical behavior at different strain rates. An important aspect of this is the temperature rise due to adiabatic conditions in high rate loading. This paper describes research that has been performed to measure the temperature rise that occurs in specimens undergoing rapid deformation. A novel thermocouple design is presented and applied to PMMA and 20 wt% DINP-plasticized PVC, deformed at moderate and high strain rates. The measurements are accompanied by investigations of strain energy.     

微梁结构热偶微波功率传感器的灵敏度分析

在微波技术研究中，微波功率是表征微波信号特性的一个重要参数。微波功率测量已成为电磁测量的重要部分，可应用于很多场合，如发射机输出功率（包括天线系统辐射的功率）和振荡器输出功率的测量，毫瓦计的校准，标准信号发生器的校准等。微波功率传感器是微波功率计探头中的核心元件。微梁结构热偶微波功率传感器选择具有低电阻温度系数的Ta2N和高热电功率塞贝克系数的Si作为热偶材料，利用半导体工艺和NEMS工艺制作。器件获得了比薄膜结构更高的灵敏度，并且具有动态范围大、零点漂移小等特点，此结构已有多种形式。着重从理论上分析了MIS结构对该传感器灵敏度的影响，并提出了一种新的结构设计，以进一步提高器件性能。