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Numerical Simulation and Analysis of Temperature Field of Continuous Temperature Measuring Sensor

Author: GuanWenChao
Tutor: XieZhi
School: Northeastern University
Course: Measuring Technology and Instruments
Keywords: Temperature sensor Temperature field Finite Element Dynamic characteristic Thermal response function
CLC: TP212
Type: Master's thesis
Year: 2008
Downloads: 43
Quote: 0
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Abstract


In the continuous casting process , Tundish temperature is the main factor affecting the quality of the finished product , and normal production . Currently, the molten steel continuous temperature sensor with its advantages of simple structure , stable performance , high accuracy , low cost , and capable of continuous temperature measurement is widely used in steel mills tundish temperature measurement . However , a continuous temperature sensor structure so that it has a longer thermal inertia in the temperature measuring process , there is a certain hysteresis phenomenon , causing unreliable measurements . This study in order to compensate for this lag dynamic error continuous temperature measurement of the dynamic characteristics of the sensor , and to provide a theoretical basis for the optimization of the sensor design and actual use . This paper first analyzes the heat transfer process of the sensor , the sensor differential equations of heat transfer ; then the equation and its boundary conditions , initial conditions for the establishment of a mathematical model of the sensor temperature field ; then this model using ANSYS software. numerical simulation study of the inner and outer layers of the sensor structure , physical parameters , initial conditions and boundary conditions and other factors affect its temperature measurement accuracy and dynamic characteristics to establish thermal analysis model ; simulation results with the steel mills field data collection compare , validate , and ultimately establish a continuous function of the temperature sensor temperature thermal response . Tangshan Iron and Steel Company Tundish in the conclusions of the numerical simulation verification , comparison and verification of continuous temperature measurement data and simulation results , show that the simulation results relative temperature error is less than 1% , the proposed model is correct . The establishment of the thermal response function residuals less than 10 ℃, can more accurately estimate the dynamic error of the sensor temperature measurement . Application of numerical simulation results , this paper studies the method of application of the simulation results tundish the of slag steel water interface temperature field for further analysis ; theoretically molten steel layer and multi-layer steel slag layer perpendicular to the direction of the temperature change , determine the feasibility of using the temperature gradient method for steel surface of the water and the slag surface boundaries detection to provide a theoretical basis for the level measurement methods based on the temperature gradient detection .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor
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