A DEVICE FOR MEASURING THE VIBRATION AMPLITUDE AND FREQUENCY OF A VIBRATING BODY WITHOUT PHYSICAL CONTACT THEREWITH

摘要

A device for measuring the vibration amplitude and frequency of a vibrating body without physical contact therewith comprising an ultrasonic transmitter for transmitting ultrasonic waves such that the said transmitter consisting of a signal generator, power amplifier and an ultrasonic transmitting transducer; an ultrasonic receiver for picking up the vibrations of the said surface, said receiver consisting of an ultrasonic receiving transducer, a signal conditioner, a digitizer, and a digital signal processing unit for furnishing an output signal of the amplitude and frequency of vibration of the vibrating body.