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Vol. 150, No. 3, March 2013, pp. 51-58

 

Bullet

 

Temperature Distribution Measurement Based on ML-EM Method Using Enclosed Acoustic CT System

 
Shinji Ohyama, Masato Mukouyama

Graduate School of Science and Engineering, Tokyo Institute of Technology

2-12-1, O-Okayama, Meguro-Ku, Tokyo, Japan

Tel.: +81-3-5734-2543

E-mail: sohyama@ctrl.titech.ac.jp

 

Received: 23 January  2013   /Accepted: 19 March 2013   /Published: 29 March 2013

Digital Sensors and Sensor Sysstems

 

Abstract: In this paper, a measurement method for cross-sectional temperature distributions is considered. A novel method based on an acoustic computed tomography (CT) technique is proposed.  Specifically, the temperature distributions are estimated using the time of flight (TOF) of multidirectional ultrasonic propagation paths. Maximum Likelihood Expectation Maximization (ML-EM) method and the Median Filter are introduced to reconstruct the temperature distributions in a square area properly. The effectiveness of the proposed reconstruction method is confirmed experimentally.

 

Keywords: Acoustic tomography, ML-EM, Temperature distribution measurement

 

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