In the research and development and production process of ultrasonic equipment, how to know whether the ultrasonic parts and components involved by the engineer meet the requirements, their quality, performance, and parameters requires the use of ultrasonic impedance measuring instruments to detect.
1. Transducer: Admittance circle diagram can not appear parasitic circle, resonance impedance should be as close as possible to design impedance, dynamic impedance should be low, quality factor Qm should be close to design requirements, capacitance should match circuit.
2. Piezoelectric ceramic sheet:
You can judge the quality of the device directly from the admittance circle chart and logarithmic coordinates. If delamination or cracks occur in the ceramic sheet, the logarithmic curve will have multiple peaks and multiple parasitic small circles appear on the admittance circle chart.
From the design, processing and assembly, whether it is reasonable or defective, it can be clearly seen directly on the circular diagram.