Application Cases

Experiment Name: Application of Power Amplifiers in Ultrasonic Emission Field Strength Testing for Transducers

Experiment Objective:
Design and fabricate an ultrasonic transducer for descaling in highly acidic fluid systems. A static fluid ultrasonic field strength testing system, assembled using polypropylene piping, was employed to study factors influencing ultrasonic propagation.

Experimental Equipment:
Ultrasonic detector, ultrasonic vibration system, ATA-4011B high-voltage power amplifier, function signal generator, digital oscilloscope, etc.

Experimental Procedure:
Fabrication of Ultrasonic Transducer:
The transducer was assembled by securely fastening components including a ceramic ultrasonic emitter, acid-resistant gaskets, plastic support plates, waveguides, piezoelectric vibrators, copper electrode plates, and steel loads using screws. After ensuring a tight seal between the plastic support plates and the transducer, it was installed at the pipeline flange position of the testing system.

Static Pipeline Ultrasonic Field Strength Testing System:
A static pipeline ultrasonic field strength testing system was designed and assembled, as shown in the diagram. The medium used was a 1.0 mol/L zinc sulfate solution or selected concentrations of highly acidic aqueous solutions. This system was used to test and compare the ultrasonic emission intensities of the designed transducer and a conventional transducer with a stainless steel emitter. For ease of comparison, both transducers were of the same dimensions, emission power, and operating frequency. Since acoustic field strength is proportional to the electrical signal strength measured by the ultrasonic sensor, a self-developed high-sensitivity composite piezoelectric sensor was used to measure voltage as a substitute for acoustic field strength in comparative analysis. A sinusoidal wave generated by the function signal generator was amplified by the ATA-4011 power amplifier to drive the transducer.

Static Pipeline Ultrasonic Field Strength Testing System

Experimental Results:
The results indicate that using a ceramic ultrasonic emitter facilitates the transmission of ultrasonic energy into the liquid phase. As the contact area between the thicker end of the waveguide and the ceramic emitter increases, the efficiency of ultrasonic energy transmission improves. The vibration nodes of the transducer were identified using finite element analysis software, optimizing the transducer's structural design.

Figure: ATA-4011C High-Voltage Power Amplifier Specifications and Parameters