Design of Ultrasonic Gas Temperature Measurement System with Humidity Self-Correction

Abstract:

In the ultrasonic gas temperature measurement system, the principle is that the velocity of sound in gas is a function of temperature. But because the propagation speed of ultrasonic wave can be easily affected by humidity, the accuracy of the gas temperature measurement will be affected too. This dissertation will implement the ultrasonic gas temperature measurement system with humidity correction suitable for all kinds of environment humidity. This type of ultrasonic technique is a highly efficient algorithm with the advantages of both time-of-flight method and phase shift method. And the system is realized with a single-chip microcomputer-based with a relative humidity/water vapor pressure meter. The main advantages of this ultrasonic temperature measurement system are high resolution, using narrow-bandwidth ultrasonic transducer of low cost and ease of implementation.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 5166-5170
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.5166
• Online since: November 2011
• Authors: Ming Lin Yao, Yu Jun Guan, Cui Ying Dong
• Keywords: Humidity Self-Correction, Phase-Shift Method, Time-of-Flight Method, Ultrasonic Gas Temperature Measurement

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