Improved Time-of-Flight Estimation Method for Acoustic Tomography System
Improved Time-of-Flight Estimation Method for Acoustic Tomography System
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DOI：
10.1109/tim.2019.2908704
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发表时间：
2020-04-01
影响因子：
5.6
通讯作者：
Jia, Jiabin
中科院分区：
文献类型：
--
作者：
Bao, Yong;Jia, Jiabin
基于声波飞行时间（TOF）测量的层析成像由于其无创、成本相对较低、时间分辨率高、易于使用等优点，被认为是一种很有前途的温度场监测技术。准确估计TOF是提高重建图像质量的关键。本文提出了一种基于赤池信息准则（Akaike information criterion， AIC）的改进TOF估计方法。对比传统的加权AIC TOF估计方法对串扰和声反射的影响，研究了两方面的改进：采用自适应窗口进行精确的AIC TOF估计；采用相位校正方法进一步提高TOF估计的时间分辨率和噪声鲁棒性。通过两个实验验证了所提出方法的可行性和有效性。
Tomographic imaging based on acoustic wave time-of-flight (TOF) measurement is considered to be a promising technique for monitoring temperature fields due to it being noninvasive, relatively low cost, having a high temporal resolution, and being easy to use. Accurate estimation of the TOF is key in improving the quality of the reconstructed images. In this paper, an improved TOF estimation method based on the Akaike information criterion (AIC) is developed. Two improvements are studied in comparison to the conventional weighted AIC TOF estimation methods against crosstalk interference and sound reflections: an adaptive window is applied for accurate AIC TOF estimation; a phase correction method is used to further improve the temporal resolution and noise robustness of the TOF estimation. The feasibility and effectiveness of the developed methods are validated in two experiments.