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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

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Mode perturbation method for optimal guided wave mode and frequency selection.

J H Philtron¹, J L Rose²

¹Graduate Program in Acoustics, The Pennsylvania State University, University Park, PA 16802, United States.

|March 1, 2014

Summary

This summary is machine-generated.

Researchers developed a novel method to optimize guided wave selection for nondestructive evaluation. This technique enhances defect detection sensitivity and inspection efficiency by identifying optimal wave modes and frequencies.

Keywords:

Interface waves Mode selection Phased array Ultrasonic guided waves

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Area of Science:

Nondestructive Evaluation (NDE)
Ultrasonic Guided Waves
Materials Science

Background:

Understanding guided wave mechanics is crucial for predicting success in NDE applications.
Optimal selection of guided wave modes and frequencies can significantly improve defect sensitivity and penetration power.
Material property uncertainties often necessitate in-field adjustments for inspection efficiency.

Purpose of the Study:

To introduce a novel mode and frequency perturbation method for identifying optimal guided wave parameters.
To enhance inspection efficiency by maximizing defect sensitivity or penetration power.
To demonstrate the technique's application in guided interface wave bond evaluation.

Main Methods:

A novel mode and frequency perturbation method was developed and applied.
An ultrasonic phased array comb transducer was utilized to sweep phase velocity and frequency space.
The technique identifies optimal mode points based on quantifiable wave characteristics.

Main Results:

The method successfully identified optimal mode and frequency points for guided wave applications.
Demonstrated effectiveness in guided interface wave bond evaluation.
The selected optimal modes offered higher sensitivity to defects or greater penetration power.

Conclusions:

The described perturbation method enables the selection of optimal guided wave modes and frequencies for specific NDE applications.
This approach allows for adjustments to increase inspection efficiency in the field.
The choice of optimal mode depends on the specific requirements of the inspection, such as defect sensitivity or penetration depth.