| Acoustic thermometry is widely used in daily life, medical research and industrial production, with great significance to broaden the application range of temperature measurement. In this paper, the acoustic thermometry methods are classified according to whether the sensitive element is in direct contact with the object to be measured. Also, this paper describes the basic principle, calculation formula and main parameters of ultrasonic internal thermometry, surface acoustic wave thermometry, sound-velocity thermometry and acoustic resonance thermometry respectively. Next, this paper introduces the main representative products, practical application and current application limitations of acoustic thermometry methods. By comparing and analyzing the precision problems and difficulties of acoustic thermometry methods, the conclusions and prospects are drawn, which can provide reference for further optimization and development of acoustic thermometry technology. |
