Application Cases

The propagation characteristics of guided waves in pipeline networks are of great significance to non-destructive testing and structural health monitoring. When guided waves pass through pipeline bends, scattering occurs, which affects the propagation efficiency and signal quality of the guided waves. Therefore, studying the scattering characteristics of guided waves at pipeline bends is crucial for optimizing non-destructive testing techniques and improving the accuracy of structural health monitoring. The method based on normal mode expansion is an effective means of studying guided wave scattering at pipeline bends. This method decomposes the propagation of guided waves in pipelines into a superposition of a series of normal modes and then analyzes the interactions and conversions of these modes at the pipeline bends.

The ATA/G-3000/300 series power amplifiers from Antai Electronics, based on Class AB amplification circuits, feature low distortion and high stability. With a maximum bandwidth of up to 120 kHz and a maximum output current of up to 40 A, they are widely used in various magnetic material tests, performance evaluations, and magnetostrictive transducer drives.

Experiment Name: Study on Guided Wave Scattering at Pipeline Bends Based on Normal Mode Expansion

Experiment Principle: Normal modes are solutions to the wave equation under specific boundary conditions, representing the basic units of wave propagation in a medium. In pipelines, the propagation of guided waves can be regarded as a superposition of a series of normal modes. When guided waves pass through pipeline bends, due to the change in the geometric shape of the pipeline, scattering occurs. The scattered waves propagate in all directions and interfere with the original guided waves. In the experiment, sensors are placed at different positions along the pipeline. The signal source and power amplifier are activated to record the amplitude, phase, and frequency of the scattered waves. Data processing software is then used to process and analyze the experimental data to obtain the scattering characteristics of guided waves at pipeline bends.

Experiment Block Diagram:

Experiment Process: An arbitrary function generator is used to generate a 5-cycle 30 kHz pulse waveform, which is then amplified by the power amplifier (Aigtek ATA-3080). The amplified signal is sent to the transmitting transducer to excite longitudinal guided waves in the pipeline. The weak guided wave signals are detected by the receiving sensors, pre-amplified, and high-pass filtered before being collected by the data acquisition system (NI PXIe-1082).

Application Directions: Non-destructive testing and structural health monitoring, pipeline design and optimization, wave control and signal processing, energy and industrial applications

Application Scenarios: Non-destructive testing, guided waves, normal modes, wave propagation, guided wave scattering, structural health monitoring

Product Recommendation: ATA-300/3000 Series Power Amplifiers

Figure: Specifications of the ATA-300/3000 Series Power Amplifiers