The thermal conductivity researchinner material by isothermal curve

• Main Authors: Wei-Shen Hsieh, 謝偉伸
• Other Authors: 張榮森
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/47jsay

碩士 === 國立中央大學 === 光電科學與工程學系 === 105 === In this paper, we discuss the method of calculating the internal temperature of the material by using the isothermal curve. Because the traditional measurement method needs to contact the material or can not reach the internal temperature of the non-destructive direct measurement material, the thermocouple can only measure a part of the local surface Temperature, infrared surface can only know the surface temperature, even the destruction of the measurement is also prone to damage in the process of generating other heat sources or the original temperature loss, easy to know the actual temperature inside the material, this paper proposed by the formula derived first Temperature curve and with the equivalent circuit can be achieved in the non-destructive material under the state of any material inside the temperature. The measurement method is used to calculate the internal temperature of the material by using the heat conduction principle and the characteristic curve of the isothermal curve. The temperature is measured in a fixed range constant temperature and humidity environment to improve the accuracy, and an external heating source is provided. The surface temperature of the material was determined by thermal image instrument, and the temperature of the material was measured by software. The characteristics of the surface of the material were obtained, and the characteristics of the heat conduction theory were used, and the data were obtained. Derivation of the formula, you can quickly get the material within the point temperature. The process can be found in the isothermal curve similar to an oval, can be informed of the direction of long and short axis, representing the different length of material or the direction of heat. Different materials have different heat transfer coefficients and different temperature curves. The proportion of the composition of the material can also use this method to calculate the composition of the concentration of how much. In the academic contribution, this paper derives the equation of the isothermal curve for later research or related personnel use, industry contribution, can get a fast and correct internal temperature measurement method. Subsequent, such as the concentration of different liquids, solid can use this method of measurement, and can further develop multi-point heat source measurement and other research.