Application Cases

【Overview】
In this study, the Aigtek ATA-2022B high-voltage amplifier was used to build an ultrasonic guided wave testing platform for identifying and localizing damage in different structures. By comparing the changes in signals received by sensors before and after damage, combined with the four-point arc localization method, the damage position was detected and localized.

Experiment Name: Experimental Study on Damage Identification of Wing Skin Structures Based on Lamb Waves

Experiment Principle:
The structural health monitoring system based on Lamb waves uses a signal generator to excite Lamb wave signals. The piezoelectric sensor converts the electrical signal into mechanical vibration, driving the tested plate to vibrate and causing Lamb waves to propagate through the structure. Piezoelectric receiving elements at other locations convert the mechanical vibration back into an electrical signal through the inverse piezoelectric effect. The signal is then acquired by an oscilloscope and transmitted to a PC, where damage localization on the plate is completed by analyzing the response signals.

Experimental Block Diagram:

Experimental Setup Photos:

Experimental Procedure:
An experimental platform was built consisting of a signal generator, high-voltage amplifier, oscilloscope, and PZT sensors. After completing the soldering, positioning, and quality inspection of the PZT sensors, experiments were conducted on both a flat plate structure and wing skin structures with groove and hole damage. A sinusoidal signal modulated by a Hanning window was applied, and a single-transmitter-single-receiver mode was used for signal acquisition. After noise reduction, differential signal processing, and Hilbert transform, the four-point arc localization method was applied to achieve damage localization, and the waveform characteristics of different types of damage were compared.

Application Fields:
Aerospace, structural health monitoring system development, industrial nondestructive testing, detection technology optimization and upgrading, automated detection equipment development

Advantages of Aigtek Amplifiers in This Application:

1. DC–1 MHz wide bandwidth and high slew rate – Precisely meets the high-frequency excitation requirements of Lamb waves, ensuring the  propagation of multimodal signals.

2. High voltage output capability – Generates high-energy Lamb waves that penetrate complex structures and improve the signal-to-noise ratio.

3. Low distortion and high output stability – Ensures the accuracy of differential signal processing before and after damage, as well as the repeatability of the four-point arc localization method.

Recommended Product: ATA-2000 Series High-Voltage Amplifier

Figure: ATA-2000 Series High-Voltage Amplifier Specifications and Parameters

The experimental materials in this article are compiled and released by Xi'an Aigtek Electronics. Aigtek has become a large-scale instrument and equipment supplier with a wide range of products in the industry. Demo units are available for free trial. Xi'an Aigtek Electronics is a high-tech enterprise specializing in the research, development, production, and sales of electronic testing instruments such as power amplifiers, high-voltage amplifiers, power signal sources, preamplifiers for weak signals, high-precision voltage sources, and high-precision current sources.