Application Cases

【Overview】
In this study, the Aigtek ATA-4315 high-voltage power amplifier was used to build an ultrasonic experimental system. Addressing the lack of research on the acoustic scattering characteristics of cylindrical scatterers buried in sediment or exposed to corrosive environments, a theoretical model of an infinite porous medium embedding a cylindrical scatterer was constructed. Using the elastic wave theory for porous media (Biot's theory) combined with boundary conditions, the backscattering spectrum was obtained and numerically simulated. The model's ability to accurately identify the position of the scatterer was experimentally verified, solving the problem of scattering field distribution caused by the complexity of porous media in principle, and providing a high-precision real-time detection solution for geological exploration and nondestructive testing of cylindrical structures.

Experiment Name: Experimental Study and Analysis of Measurement Methods for Acoustic Scattering Characteristics of Cylindrical Scatterers in Porous Media and the Energy Transfer Efficiency of an Ultrasonic Experimental System

Experiment Objective:
This study aims to investigate the influence of parameters such as porosity and dimensionless frequency ka on the acoustic scattering characteristics of cylindrical scatterers in porous media. By building an ultrasonic experimental system and combining it with variational mode decomposition and total focusing imaging algorithms, the correctness of the theoretical model, the accuracy of scatterer position recognition, and real-time detection capability were verified, providing a high-precision online monitoring solution for geological exploration and nondestructive testing of cylindrical structures.

Testing Equipment:
Signal generator, high-voltage power amplifier (ATA-4315), transmitting and receiving probes, test specimen, oscilloscope, host computer.

Experimental Procedure:
An ultrasonic experimental system was built to study the acoustic scattering characteristics of cylindrical scatterers in porous media. Variational mode decomposition and total focusing imaging algorithms were combined to achieve real-time data processing. After system calibration, scattering signals were acquired by varying the angle between the probes, and time-domain waveforms were recorded for algorithm analysis. Theoretical and experimental data were compared to verify the consistency of the scattering amplitude ratio, confirming the correctness of the model. Finally, signal reconstruction imaging was used to accurately identify the scatterer position, and the acoustic wave propagation attenuation characteristics were analyzed. The system stability and reliability were verified under varying porosity and dimensionless frequency ka conditions. Real-time analysis and accuracy assessment confirmed that this method is suitable for geological exploration and nondestructive testing of cylindrical structures.

Figure 1: Schematic Diagram of the Overall Experimental System

Experimental Results:
Using the ultrasonic experimental system combined with variational mode decomposition and total focusing imaging algorithms, the correctness of the theoretical model for acoustic scattering characteristics of cylindrical scatterers in porous media was verified. The results show that under different probe angles (5°, 30°, 60°), the time-domain signals captured experimentally were consistent with the theoretically predicted trend of scattering amplitude ratio, showing high agreement after normalization, confirming that the model effectively characterizes the distribution of the scattering field.

Figure 2: Comparison of Captured Time-Domain Signals

Figure 3: Reconstructed Scattering Interface

Advantages of Aigtek Amplifiers in This Application:

1. Wideband coverage – Precisely meets the full-band frequency sweep testing requirements for the dimensionless frequency ka parameter.

2. Voltage output – Overcomes the strong attenuation of porous media, ensuring reliable capture of high signal-to-noise ratio scattering signals.

3. Low harmonic distortion and high output stability – Ensures the signal processing accuracy of variational mode decomposition and total focusing imaging algorithms.

Recommended Product: ATA-4315 High-Voltage Power Amplifier

Figure: ATA-4315 High-Voltage Power Amplifier Specifications and Parameters