Research on Measuring the Resonant Frequency of Vibrating Cylinder with Frequency Sweep Method

Introduce the principle of measuring resonant frequency of vibrating cylinder with frequency sweep method and its implementation method. Design a measurement system that includes frequency sweeping signal generator, AGC amplifier, amplitude - phase detection, AID converter acquisition and the keyboard and LCD. The frequency sweeping signal generator can generate sine wave in different frequency to drive the excitation coil of vibrating cylinder, then the amplitude and phase can be collected from the pick-up coil. The LCD can show the amplitude-frequency curve and phase-frequency curve. This method can accurately measure the resonant frequency of vibrating cylinder, and the phase difference between excitation and pick-up signal and calculate the Q value. It can provide more measurement information and fully embody the characteristics of the vibrating cylinder.