Application Cases

Experiment Name: Experimental Study of Magnetostrictive Patch Transducers

Test Equipment:
ATA-2022B high-voltage amplifier, signal generator, oscilloscope, transducer, PC, etc.

Experimental Process:

Figure 1: Schematic Diagram of the Experimental System Setup

The experimental system utilizes a signal generator to provide the input signal, which is amplified by a high-voltage amplifier and transmitted to the excitation transducer to generate the excitation signal. The receiving transducer captures the signal and transmits it to the oscilloscope, which then sends it to a PC for signal acquisition, observation, and storage. The schematic diagram of the experimental system setup is shown in Figure 1. The physical setup of the experimental system used in this study is shown in Figure 2.

Figure 2: Physical Image of the Experimental System Equipment

Test Results:

An experimental platform was constructed, including a signal generator, high-voltage amplifier, oscilloscope, host computer, transducers, and the test object. An excitation signal modulated by a Hanning window was set, and groups of excitation and receiving transducers were arranged and bonded to the aluminum test plate. The following configurations were used:

1. MPT excitation signal with PZT reception,

2. PZT excitation signal with MPT reception,

3. GMPT single-transmit-single-receive signal,

4. MDPT excitation signal with PZT reception,

5. PZT excitation signal with PZT reception.

By verifying the velocity of the direct wave, it was confirmed that the designed transducers could excite, receive, or perform single-transmit-single-receive Lamb wave signals. After signal processing and resampling, the sum of squared signal amplitudes was obtained. The GMPT patch volume was half that of the MPT patch, yet its energy intensity increased by 5.62 times. The sum of squared excitation signal amplitudes for MDPT was 1.48 times that of traditional PZT. A frequency sweep experiment determined the optimal operating frequency of the MDPT to be 65.6 kHz. PZT patches were arranged in a semicircle around the MDPT on the aluminum plate, confirming that the MDPT exhibited relatively good omnidirectional characteristics.

Recommended High-Voltage Amplifier: ATA-2022B

Figure: ATA-2022B High-Voltage Amplifier Specifications

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