Application Cases

About Materials Testing

Materials testing, as a crucial part of materials science research and industrial production quality control, covers a wide range from basic scientific research to practical production. It plays an indispensable role in promoting material innovation and ensuring product quality.

During the process of materials testing, it is often necessary to apply specific excitation signals to materials to observe their responses and thereby obtain the performance parameters of the materials. Common signal generators typically output signals with low power, which may not meet the requirements of materials testing that demands higher signal power. In such cases, power amplifiers can play a key role. Aigtek, a leading electronics company, will share some recent experimental cases in the field of materials testing to assist engineers in related fields.

Experimental Case Demonstrations

▼ Application of High-Voltage Amplifier in Ferroelectric Domain Reversal Research

In the field of nonlinear optics, improving frequency conversion efficiency is one of the key objectives. Traditional phase-matching methods are limited by the material dispersion characteristics, while quasi-phase-matching (QPM) technology overcomes this limitation by creating periodic structures within the material to compensate for phase mismatch, thereby enhancing frequency conversion efficiency. In particular, in crystals with ferroelectric properties, periodic domain reversal can be achieved by applying a high electric field, enabling QPM. In this process, using a high-voltage amplifier to apply a high electric field is a crucial step in achieving periodic domain reversal.

▼ Application of High-Voltage Amplifier in Ultrasonic Non-Destructive Testing of Composite Plates

Carbon fiber reinforced polymer (CFRP) composites are widely used in the aerospace field due to their excellent mechanical properties. However, detecting and locating damage in composite materials remains a significant challenge. This study introduces a novel method using a multi-modal gated recurrent unit neural network (MGNN) model for damage detection and localization in carbon fiber reinforced polymer composites.

▼ Application of High-Voltage Amplifier in the Control of Electroactive Polymer-Based Facial Robots

In this experiment, the core flexible component of the facial robot is made by stacking PVC gel electroactive polymer with a stainless-steel mesh electrode. Under the influence of an electric field, the gel undergoes creeping deformation, causing the gel to fill the mesh pores of the electrode under the electric field, resulting in thickness-direction expansion and contraction movements.

▼ Application of High-Voltage Amplifier in Electro-Luminescence

In this experiment, signals generated by a signal generator and an amplifier are ultimately grounded at one end and connected to a metal plane at the other end. By bringing the luminescent fiber within 10 cm of the metal plane, the fiber can be made to emit light through human touch. This wireless method ultimately enables novel visual applications such as solvent polarity visualization, underwater luminescence, and touch-induced luminescence.

▼ Application of High-Voltage Amplifier in Achieving Non-Hermitian Acoustic Band Weaving

This experiment constructs a simple non-Hermitian tight-binding model to explore the topological weaving and phase transitions of acoustic complex bands. To realize acoustic non-Hermiticity, non-reciprocal coupling is introduced into a dual-cavity-tube structure, modulated by a power amplifier and a phase shifter. The former regulates the unidirectional coupling strength, while the latter simulates lattice momentum, thereby generating a series of topological complex band chains and knots in the synthetic dimension space, including single chains, single knots, Hopf links, and trefoil knots.

▼ Application of Power Amplifier in High-Power Piezoelectric Material Testing

This paper investigates the piezoelectric and dielectric properties of piezoelectric materials operating under high-power conditions. Since piezoelectric properties under small-signal conditions cannot be directly applied to high-power transducers, a comprehensive impedance method combining the advantages of constant-voltage and constant-current methods, as well as an improved transient method, has been developed for high-power testing of PZT-5H piezoelectric ceramics. The effects of power and temperature on the performance of PZT-5H were studied, particularly the trends of the electromechanical coupling coefficient k31, piezoelectric constant d31, and elastic compliance sE11 with increasing power, as well as the rapid attenuation and stabilization of the mechanical quality factor Qm.

More Application Case Sharing

After years of accumulation, Aigtek has now established its own power amplifier application case library, gathering cutting-edge experimental research results from the forefront of the field to help researchers expand their thinking and break through innovation. More power amplifier application cases will be shared in the future, so stay tuned.