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Sensors 2017, 17(9), 2084; https://doi.org/10.3390/s17092084

Dynamic Reconstruction Algorithm of Three-Dimensional Temperature Field Measurement by Acoustic Tomography

Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, North China Electric Power University, Beijing 102206, China
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Received: 18 July 2017 / Revised: 5 September 2017 / Accepted: 6 September 2017 / Published: 12 September 2017
(This article belongs to the Special Issue Acoustic Sensing and Ultrasonic Drug Delivery)
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Abstract

Accuracy and speed of algorithms play an important role in the reconstruction of temperature field measurements by acoustic tomography. Existing algorithms are based on static models which only consider the measurement information. A dynamic model of three-dimensional temperature reconstruction by acoustic tomography is established in this paper. A dynamic algorithm is proposed considering both acoustic measurement information and the dynamic evolution information of the temperature field. An objective function is built which fuses measurement information and the space constraint of the temperature field with its dynamic evolution information. Robust estimation is used to extend the objective function. The method combines a tunneling algorithm and a local minimization technique to solve the objective function. Numerical simulations show that the image quality and noise immunity of the dynamic reconstruction algorithm are better when compared with static algorithms such as least square method, algebraic reconstruction technique and standard Tikhonov regularization algorithms. An effective method is provided for temperature field reconstruction by acoustic tomography. View Full-Text
Keywords: acoustic tomography; three-dimensional temperature field; reconstruction algorithm; dynamic model;robust estimation acoustic tomography; three-dimensional temperature field; reconstruction algorithm; dynamic model;robust estimation
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Li, Y.; Liu, S.; Inaki, S.H. Dynamic Reconstruction Algorithm of Three-Dimensional Temperature Field Measurement by Acoustic Tomography. Sensors 2017, 17, 2084.

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