储粮温度分布声学CT重建仿真  

Simulation on acoustic CT reconstruction of temperature distribution of stored grains

作　　者：颜华[1] 庄蔷 王晓宁[1,2] 

机构地区：[1]沈阳工业大学信息科学与工程学院,沈阳110870 [2]沈阳大学信息工程学院,沈阳110044

出　　处：《沈阳工业大学学报》2015年第6期662-666,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(60772054;61372154);辽宁省高等学校优秀人才支持计划项目(LR2013005)

摘　　要：为了实现储粮温度分布声学CT法监测,对三维温度场的声学CT重建进行了仿真研究.将30个声波收发器以两种不同的布局设置在被测区域周围,被测区域的剖分考虑了1 000和1 500个像素两种方式,对约2 000个单热点模型温度场进行了仿真数据重建,并利用重建温度场的均方根误差、热点温度误差和热点位置误差评价了温度场重建质量.结果表明,收发器布局和被测区域剖分方式都会对温度场的重建质量产生较大影响,该仿真研究为声学CT系统的优化提供了依据.In order to realize the acoustic computer tomography （CT） monitoring of temperature distribution in stored grains, the reconstruction of three-dimensional temperature fields with acoustic CT was simulated and researched. Thirty sound transceivers were arranged around the measurement region in two different layouts. The measurement region is subdivided in two different ways of 1 000 and 1 500 voxels. About two thousand single-hot model temperature fields were reconstructed with the simulation data. The root-mean-square error, hot spot temperature error and hot spot position error of reconstructed temperature fields were used to evaluate the quality of the fields. The results show that both transceiver layout and the subdivision ways of measured region have great effect on the reconstruction quality of temperature fields, and the simulation research can provide the basis for the optimization of acoustic CT system.

关 键 词：声学CT 储粮 三维温度分布 重建 收发器布局 优化 重建误差 仿真研究 

分 类 号：TK311[动力工程及工程热物理—热能工程]