A NOVEL ULTRASONIC THERMOMETRY FOR MONITORING TEMPERATURE PROFILES IN MATERIALS |
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| Ikuo Ihara, Manabu Takahashi |
- Abstract:
- A new ultrasonic method for monitoring the temperature distribution inside a material being heated or cooled is presented. The principle of the method is based on the temperature dependence of the velocity of ultrasonic wave propagating through a material. An effective inverse analysis coupled with a finite difference calculation is used to determine the one-dimensional temperature distribution inside a thick plate. To verify the practical feasibility of the ultrasonic method, experiments have been demonstrated. A single side of a steel plate of 30 mm thickness is heated by contacting with a heater of 200 ºC and subsequently cooled down by water. Ultrasonic pulse-echo measurements are then performed for the steel during the heating and cooling. A change in the transit time of longitudinal ultrasonic waves across the steel is continuously acquired and used to determine the temperature distribution inside the steel. The temperature distribution and its transient variation determined by the ultrasonic method almost agree with those obtained using thermocouples installed in the steel. Thus, it is verified that the present method can be a promising means for real-time monitoring of temperature profiles in materials being heated or cooled.
- Keywords:
- ultrasonic thermometry, temperature distribution, inverse analysis
- Download:
- IMEKO-WC-2009-TC12-627.pdf
- DOI:
- -
- Event details
- Event name:
- XIX IMEKO World Congress
- Title:
Fundamental and Applied Metrology
- Place:
- Lisbon, PORTUGAL
- Time:
- 06 September 2009 - 11 September 2009