Accurate Ultrasonic Thickness Measurement for Arbitrary Time-Variant Thermal Profile
Abstract
:1. Introduction
2. Calibration and Theoretical Formulation
2.1. Calibration
2.1.1. Experimental Setup and Procedure
2.1.2. Calibration Results
2.2. Theoretical Formulation for Thickness Estimation
3. Experiments
- Step (1)—calculate the experimental speed ratio () using the measured TOF from shear and compressive sensors, as shown in Equation (5).
- Step (2)—using the temperature and speed ratio relationship from calibration, calculate the average temperature () in the plate.
- Step (3)—use in Equations (9) or (10) to calculate the average speed of compressive or shear ultrasonic waves, respectively. To ensure an unbiased comparison with other two methods, shear speed is also used here in the following step.
- Step (4)—obtain the thickness of the plate from the calculated shear speed.
4. Results and Discussions
4.1. Continuous Heating
4.2. Intermittent Heating
5. Summary and Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Palanisamy, R.P.; Pyun, D.-K.; Findikoglu, A.T. Accurate Ultrasonic Thickness Measurement for Arbitrary Time-Variant Thermal Profile. Sensors 2024, 24, 5304. https://doi.org/10.3390/s24165304
Palanisamy RP, Pyun D-K, Findikoglu AT. Accurate Ultrasonic Thickness Measurement for Arbitrary Time-Variant Thermal Profile. Sensors. 2024; 24(16):5304. https://doi.org/10.3390/s24165304
Chicago/Turabian StylePalanisamy, Rajendra P., Do-Kyung Pyun, and Alp T. Findikoglu. 2024. "Accurate Ultrasonic Thickness Measurement for Arbitrary Time-Variant Thermal Profile" Sensors 24, no. 16: 5304. https://doi.org/10.3390/s24165304