Acoustic Speed Measurement Platform for Monitoring Highly Concentrated Gas Temperature Distribution

Soma Pal, Fu Sung Lin, Ching Chuan Hsieh, Man Ching Huang, Cheng You Lee, Ya Han Liu, Chen Yuan Lu, Shan Wen Du, Chih Hsien Huang

研究成果: Article同行評審

摘要

Acoustic thermography reconstructs 2-D gas temperature distributions by using sound speeds from multiple paths across a plane. However, a reliable platform that can provide accurate sound speeds in a highly concentrated temperature distribution environment has not been fully discussed. Most of the existing temperature reconstruction algorithms are developed using simulated data and validated with customized systems. The results from the reported systems are difficult to reproduce due to the lack of critical information, such as the methods for determining the time of flight (TOF). Moreover, previous attempts have not investigated the effect of a sharp temperature gradient, in which the difference of acoustic impedance between high- and low-temperature regions cannot be neglected. In response, this letter demonstrates a reliable acoustic platform designed specifically for measuring the acoustic speeds in an environment with a critical temperature distribution. The main components of the proposed platform are discussed in detail, including the TOF calculation technique, the hardware architecture, and the working principle. The performance of the platform has been evaluated by comparing the captured acoustic velocities and the reconstructed temperature map with results from a thermocouple array. The average acoustic velocity measured by the proposed platform for 100 times is 341 \pm \ 3 m/s at room temperature (25 °C) and 354 \pm \ 5\ m/s after heater turned on (38.27 °C). Moreover, the 2-D temperature map reconstructed by acquired acoustic velocities also matches the results from the thermocouple array. Therefore, the proposed platform can be considered as an accurate and reliable acoustic speed measurement system for monitoring the 2-D temperature distribution.

原文English
文章編號5500404
期刊IEEE Sensors Letters
6
發行號3
DOIs
出版狀態Published - 2022 3月 1

All Science Journal Classification (ASJC) codes

  • 儀器
  • 電氣與電子工程

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