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Inverse stimulation enables ultrasonic binary coding for NDE using a custom linear testing system.

Marius W Schäfer¹, Sarah C L Fischer¹

¹Fraunhofer IZFP, Campus E3.1, Saarbruecken, 66123, Saarland, Germany.

|May 26, 2024

Summary

This summary is machine-generated.

This study introduces inverse stimulation for ultrasonic testing, enabling precise control over ultrasonic echoes. This method achieves binary ultrasonic echo generation with performance matching digital codes, enhancing non-destructive evaluation capabilities.

Keywords:

Binary coding Coded excitation Inverse stimulation Linear system model Ultrasound

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Area of Science:

Materials Science
Non-Destructive Evaluation
Signal Processing

Background:

Conventional ultrasonic testing methods face limitations with complex materials.
Techniques like coded stimulation in radar and medical ultrasound offer potential for optimization.
Extending ultrasonic testing capabilities requires advanced signal processing strategies.

Purpose of the Study:

To explore inverse stimulation for ultrasonic testing systems.
To engineer ultrasonic echoes to match target code sequences.
To demonstrate a novel approach for enhancing ultrasonic non-destructive evaluation.

Main Methods:

Designed and built a custom ultrasonic testing system.
Obtained the system's transfer function using pulse and chirp stimulation.
Performed inverse stimulation based on the transfer function to shape ultrasonic echoes.
Analyzed the auto-correlation function of generated echoes and compared them to the original code sequence.

Main Results:

Successfully engineered ultrasonic echoes to match target binary code sequences.
Demonstrated that inverse stimulation can generate binary ultrasonic echoes with performance equivalent to digital codes.
Validated the effectiveness of the custom-built ultrasonic system for echo engineering.

Conclusions:

Inverse stimulation is a viable technique for advanced ultrasonic testing.
The proposed integrated, low-voltage system enables echo engineering via transfer function analysis.
This approach significantly enhances the capabilities and applications of ultrasonic non-destructive evaluation.