Application Cases

Ultrasonic non-destructive testing is a commonly used technique for detecting internal defects in materials and components. It leverages the propagation characteristics of ultrasonic waves within materials, detecting internal defects by receiving echo signals. Ultrasonic non-destructive testing offers advantages such as high precision, speed, and non-destructiveness, making it widely applicable in the industrial sector.

The principle of ultrasonic non-destructive testing is based on the propagation characteristics of ultrasonic waves in materials. Ultrasonic waves are high-frequency sound waves, typically ranging from 1 MHz to 50 MHz. When ultrasonic waves propagate through a material and encounter an interface or defect, phenomena such as reflection, refraction, and scattering occur. These phenomena alter the propagation path and amplitude of the ultrasonic waves. By analyzing the received echo signals, information about the location, shape, and size of defects within the material can be determined. The ATA-2021B high-voltage amplifier, with its balanced bandwidth and voltage specifications, has broad applications in the field of non-destructive testing. Today, Aigtek shares several previous non-destructive testing cases, hoping to assist researchers in their work.

Case 1: Application of ATA-2021B High-Voltage Amplifier in the Detection of Hole Crack Defects in CFRP Plates Using Giant Magnetostrictive Transducers

Required Equipment:
ATA-2021B high-voltage amplifier, signal source, oscilloscope, transducers, etc.

Experiment Overview:
A frequency sweep signal was applied to the transducer to determine its optimal operating frequency range. An excitation signal was then applied to the transducer, and ultrasonic guided waves were used to detect hole defects in CFRP. Signal processing was performed to identify the defect location. The experimental plate was made of CFRP, with dimensions of 500 mm × 500 mm and a thickness of 2 mm. The excitation waveform was generated by a signal generator, amplified by a power amplifier, and used to drive a giant magnetostrictive transducer to produce high-energy ultrasonic signals. A PZT-5 square patch was employed for signal acquisition. By analyzing the signals, information about defects contained in the guided wave signals was determined.

Case 2: Application of ATA-2021B High-Voltage Amplifier in the Study of Wood Joint Damage Identification Using Piezoelectric Sensing Technology

Required Equipment:
ATA-2021B power signal source, laptop, test specimens, etc.

Experiment Overview:
This experiment investigates the feasibility of using piezoelectric active sensing to identify damage at the joints of mortise-and-tenon wood structures. As the driver, PZT1 generates stress waves that propagate through the structure and are received by PZT2, which acts as the sensor. When damage occurs in the structure, the energy of the propagating stress waves decreases. The stress wave signal received by PZT2 weakens compared to the signal under healthy conditions, and the severity of the damage corresponds to a reduction in the received stress wave energy. This method enables the identification of structural damage.

Figure: Specifications of the ATA-2021B High-Voltage Amplifier