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Research on Reconstruction of Temperature Fields Based on Acoustic Sensors

Author: LiuZhe
Tutor: ShaoFuQun
School: Northeastern University
Course: Detection Technology and Automation
Keywords: Acoustic Method Temperature field The method of least squares Single - path function method
CLC: TK311
Type: Master's thesis
Year: 2008
Downloads: 53
Quote: 2
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Abstract


The combustion temperature test technology is one of the important foundation of the combustion theory and technology development , and the furnace flame temperature field has a very important significance for boiler control and combustion diagnostics . The acoustic thermometry temperature measurement method as a new , fast, accurate , wide measuring range , temperature field measurement and online control can meet the needs of industrial production , scientific research , for the optimization of combustion , reduce pollution , equipment the safe operation , as well as the furnace design has important guiding significance . This article describes the basic theory and common methods of measurement of acoustic temperature field detection . Coal-fired boiler furnace temperature field reconstruction based on the measurement of acoustic wave propagation time between the sensor and a simulation study. Selected on two typical planar vertical furnace , these two planes are surrounded by three-dimensional temperature field reconstruction . Provided each on a plane uniformly placed eight received / hair combo sound sensor , the sound of a sensor may be not the same all the other sensors in the side walls of the received . According to the measured acoustic wave propagation between different sensors , using the least squares method, unimodal symmetric temperature field , single peak deflection temperature field and the bimodal temperature field of three-dimensional temperature field reconstruction . Determine a single path function for symmetrically typical furnace temperature field , first , and then divided into a grid , and the temperature values ??of the grid points interpolation method and algorithm for the reconstruction of the two-dimensional temperature field . However, the algorithm has some limitations , only unimodal symmetric temperature field better reconstruction . Concluded many factors affect the temperature field reconstruction accuracy and propose improvement methods .

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal measurement and thermal automatic control > Measurement techniques and instrumentation > Temperature Measurements
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