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本文介绍一种用于频率范围2～5O千周,振幅500～3000埃的高频振动的测振方法,它以激光波长为标准,是一种振幅绝对测量法.此法的干涉系统通过测量光束与标准高频振动台发生联系,当振动台振动时,移动的干涉条纹经光电转换后进入专用示波器形成莉萨如圆,它以相位表征振动台的振幅,专用示波器的作用是把相位圆按相位进行等分.细分后的脉冲信号经放大整形后送入计数器的A门,计数器用A/B计数.B门为计数的开关门,它由信号发生器输入周期信号,这样,计数器所显示的计数值为振动台振动一周期的总
This paper presents a method for vibration measurement of high-frequency vibration in the frequency range of 2 ~ 50Othousands of weeks with an amplitude of 500 ~ 3000A, which is an absolute amplitude measurement method based on laser wavelength.The interference system of this method measures When the vibrating table is vibrated, the moving interference fringes enter the special oscilloscope to form Lisa Ruyuan by photoelectric conversion, which characterizes the amplitude of the vibrating table by the phase. The purpose of the special purpose oscilloscope is to make the phase circle Divided by the phase.After the breakdown of the pulse signal amplified by plastic into the A door counter, counter with A / B count.B door for the count of the switch door, it is the signal generator input cycle signal, so that the counter The displayed count value is the total vibration of the vibration table for a period