Temperature Distribution Measurement Using Reflection with Acoustic Computerized Tomography

Abstract

In this paper, we propose a new acoustic computerized tomography (A-CT) method using reflection. This method is alternate optimization for measuring the temperature distribution in a cylindrical space. The A-CT method using reflection includes two inverse problems, namely, the back projection of Radon transform and the division of times of flight (TOFs) of reflected sounds into TOFs of pre-reflection and post-reflection. The TOF estimation problem requires the temperature distribution. To solve this problem mathematically, alternate optimization is applied to the A-CT method using reflection. Simulation results indicate that our new A-CT method using reflection is useful for measuring the temperature distribution in a cylindrical space.

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

“…152,180,189,190) Temperature and flow measurements and their visualization have also been performed in air as examples of environmental measurement. [126][127][128][129]132,133,[191][192][193][194][195][196][197][198] In addition, buried objects and the distribution of soil properties have been visualized as examples of underground measurements. 143,185,[199][200][201][202][203][204][205][206][207] …”

Estimation of water stress of plant by vibration measurement of leaf using acoustic radiation force

“…By using these techniques, we are aiming to perform the most suitable irrigation control to save water in soil culture by adopting ''negativepressure-difference irrigation'', which is reported to be effective for cultivating plants as well as saving water [21]. Acoustic techniques are also applied to the measurement of environmental conditions, such as temperature, humidity, and wind velocity [22][23][24].…”

Accuracy Evaluation of Surface Temperature Profiling by a Laser Ultrasonic Method

“…In the early stages, Degertekin et al 1) carried out temperature measurements of semiconductor wafers using Lamb waves, and Simon et al 2) attempted to fabricate a temperature tomograph using an array sensor. Mizutani and coworkers, 3,4) Kudo and coworkers, 5,6) Huang et al, 7) Tsai et al, 8) Funakoshi et al, 9) and Minamide et al 10) extensively studied the measurements of temperature distributions in air using multiple sensors. Chen et al, 11) Balasubramainiam et al, 12) and Ishikawa and Mizutani 13) applied temperature measurement techniques using a delay line to industrial applications.…”