声学法重建炉内温度场的算法研究

基于声学测温的基本原理和理想状态下炉内温度场的分布规律,提出了每条声波传播路径上温度的抛物线函数,利用数值计算插值方法中的平方反比法,得出了测量平面上划分的各网格点温度值,从而实现了二维温度场的重建。基于领域经验,借助工程数学软件MATLAB,对本重建算法进行了计算机仿真,得出了二维温度场的网格立体图和等温线图。最后,将仿真出的温度场和理想温度场比较,进行误差分析,验证了本重建算法的正确性和可行性,取得了声学测温图像重建的一定进展。

Research on Reconstruction Algorithm of Temperature Field by Acoustic Measurement in Boiler

Based on the theory of acoustic measurement of gas temperature and the ideal temperature field distribution in boiler,parabola function is chosen to describe the temperature character on every sonic path.In the grid on the measured plane,the temperature of each node can be obtained by the inverse square distance law.The reconstruction of the two-dimensional temperature field is realized.According to the specialty experience and engineering software,MATLAB,computer simulation of the reconstruction algorithm can be done,and the three dimensional display and the isothermal contour can be produced.Finally,the simulated temperature field is compared with the ideal one,and the error is analyzed.It is proved that the reconstruction algorithm is accurate and feasible.This research acquires the effective progress in picture reconstruction by acoustic pyrometry.