IEEE Trans Ultrason Ferroelectr Freq Control. 2022 Apr;69(4):1497-1507. doi: 10.1109/TUFFC.2022.3151778. Epub 2022 Mar 30.
To improve the ability of the acoustic computed tomography (CT) temperature field reconstruction system for reconstructing various temperature distributions in the measured area, square and circular layouts of transducers were studied. In case of the square layout, the focus was on the placement of the transducers, and in case of the circular layout, the focus was on the division of grids. We proposed the coefficient matrix theory and indexes for studying and evaluating transducers layout. Four typical temperature field models were simulated and reconstructed. Simulation results showed that in a square layout, optimizing the position of transducers can result in better reconstruction quality. In a circular layout, a regular hexagonal grid division was better than an equal-area division, and better reconstruction quality was obtained by choosing the appropriate number of grids. For a small number of transducers, the circular layout of nine transducers with 27 acoustic rays and 91 regular hexagonal grids resulted in better reconstruction quality than the square and circular layout of eight transducers; in each reconstruction, the error was ≤ 5.07%.
为了提高声层析（CT）温度场重建系统重建测量区域内各种温度分布的能力，研究了换能器的方形和圆形布置。在方形布置的情况下，重点是换能器的放置，而在圆形布置的情况下，重点是网格的划分。我们提出了系数矩阵理论和指标，用于研究和评估换能器布置。模拟和重建了四个典型的温度场模型。仿真结果表明，在方形布置中，优化换能器的位置可以获得更好的重建质量。在圆形布置中，规则六边形网格划分优于等面积划分，通过选择适当的网格数量可以获得更好的重建质量。对于少量的换能器，采用 9 个换能器和 27 个声射线以及 91 个规则六边形网格的圆形布置，其重建质量优于 8 个换能器的方形和圆形布置；在每次重建中，误差均≤5.07%。
