波尔共振仪相位差测量方法的改进

IMPROVING THE MEASURING METHOD OF PHASE DIFFERENCE USING THE POHL RESONATOR

介绍了波尔共振仪研究机械受迫振动的幅频特性和相频特性的用途 ,阐述了频闪法测定相位差和利用脉冲电路改进相位差测量的方法 ,给出了改进方案电路方框图及各点波形图并分析了数字显示相位差的理论依据 .

We introduced the application of the Pohl resonator in studying the amplitude-frequency and the phase-frequency characteristics of a forced oscillation discussed. The measuring method of phase difference with a stroboscope and the measuring method of phase difference by applying an impulse circuit, together with the block diagram of the circuit and the oscillogram for each joint. The principle of digital display of the phase difference is analyzed.