Application Cases

Experiment Name: Application of the ATA-1372A Broadband Amplifier in Ultrasonic Detection of Fiber-Optic Ultrasonic Sensors in Solid/Liquid Environments

Experiment Direction:Ultrasonic Detection

Experimental Equipment:ATA-1372A Broadband Amplifier, Signal Generator, Piezoelectric Ceramic Transducer, Tunable Laser, Circulator, Oscilloscope, etc.

Experiment Objective:To generate sinusoidal signals through a signal generator, amplify them using a power amplifier to drive a piezoelectric ceramic transducer, and excite continuous and pulsed ultrasonic signals at different frequencies. The experiment aims to compare the ultrasonic detection characteristics of fiber-optic ultrasonic sensors with those of a reference piezoelectric ceramic transducer in both solid and liquid environments, thereby verifying the ultrasonic detection characteristics of the fiber-optic ultrasonic sensors.

Experiment Process:The ultrasonic detection experimental system in a solid environment is shown in the figure. A metal plate is used as the transmission medium for ultrasonic waves, allowing the testing of continuous and pulsed ultrasonic signals in solid materials. The experimental system consists of two parts: acoustic emission and acoustic detection. The acoustic emission part generates pulsed and continuous ultrasonic signals by driving a PZT transducer with a signal generator and a power amplifier. The acoustic detection part uses a fiber-optic ultrasonic sensing structure to detect the acoustic pressure of ultrasonic waves.

Experiment Results:

• For continuous ultrasonic signals at 300 kHz, 2 MHz, and 3 MHz, the signal-to-noise ratio (SNR) of the sensing structure was 41.8 dB, 66.5 dB, and 61.7 dB, respectively.

  
  

• For pulsed ultrasonic signals at 300 kHz, 2 MHz, and 3 MHz, the SNR of the sensing structure was 41.6 dB, 67.6 dB, and 56.8 dB, respectively.

  
  

The experimental results for continuous and pulsed ultrasonic signals indicate that the sensing structure exhibits a wide frequency response range of 300 kHz to 3 MHz for both continuous and pulsed signals in solids. Within the ultrasonic frequency range of 2–3 MHz, its performance is comparable to that of the reference PZT.

Specifications of the ATA-1372A Broadband Amplifier Used in the Experiment: