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High power ultrasound standard
1Acoustical Standards, Institute for National Measurement Standards, National Research Council, Ottawa, Ontario Canada.
The Journal of the Acoustical Society of America
|May 11, 2002
Summary
This study introduces a cost-effective ultrasonic power measurement system using a radiation force balance. The automated system achieves measurement uncertainties between 5% and 10%, improving accuracy in ultrasonic power assessment.
Area of Science:
- Acoustics
- Metrology
- Engineering
Background:
- Accurate measurement of ultrasonic power is crucial for various applications.
- Existing methods may be complex or costly.
- A need exists for a sensitive, economical, and automated system.
Purpose of the Study:
- To present a novel, sensitive radiation force balance for laboratory ultrasonic power measurement.
- To describe the implementation and automation of an economically attractive system.
- To investigate design aspects influencing measurement uncertainty.
Main Methods:
- Utilizing the principle of measuring ultrasonic radiation force on a conical float in water.
- Automating system operation via the IEEE-488 bus and a desktop computer.
- Developing a theoretical model for ultrasonic power measurement with a conical reflector target.
Main Results:
- A functional and economically viable radiation force balance system was implemented.
- System operation was successfully automated for efficient laboratory use.
- Expanded uncertainty (95% confidence level) was estimated between 5% and 10%.
Conclusions:
- The developed radiation force balance offers a sensitive and automated solution for ultrasonic power measurement.
- The system's design allows for investigation of factors affecting measurement uncertainty.
- The achievable uncertainty range makes this system suitable for laboratory applications.