三维温度场声学CT重建中的声波路径选择

Selection of sound path in reconstruction of 3D temperature field with acoustic CT

为了优化三维温度场声学CT重建系统,对声波路径的合理选择进行了仿真研究.将20个声波收发器布置在长方体被测区域的周围,分别考虑了4种声波路径选择方式,保留了非重复的所有路径、去除了长方体棱边上的路径、去除了长方体侧面上的路径和去除了长方体表面上的路径.用相对误差、均方根误差等指标,评价了温度场的重建质量.结果表明,声波路径的选择方式对温度场重建具有明显影响.合理地选择声波路径,可以降低声学CT法温度场重建的误差和计算量.

In order to optimize the acoustic computer tomography （CT） reconstruction system for the 3D temperature field, the reasonable selection of sound path was performed with simulation research. Twenty sound transceivers were arranged around a cuboid measurement area. Four acoustic path selection modes were considered, all non-duplicated paths were retained, and the paths on the edges, sides and surfaces of the cuboid were removed. In addition, the relative error and root-mean-square error were used to evaluate the reconstruction quality of temperature field. The results show that the selection modes of sound path have an obvious effect on the reconstruction of temperature field. The errors and computation amount in the acoustic CT method for the reconstruction of temperature field can be reduced through the reasonable selection of sound path.