Vibration measuring device and method

Abstract

The invention discloses a vibration measuring device and a method. A vibration induction unit is used for inducting a vibration state and emitting light beam emitted by the light source emitter; an acquisition unit is used for collecting the light beam reflected by the vibration induction unit and transforming a collected optical signal to an electrical signal; and an electrical signal corresponding to the reflected light beam is analyzed to obtain a vibration direction and an amplitude size. Specifically, when vibration is received, the vibration induction unit generates corresponding deformation; the reflected light beam generates a corresponding displacement; and the vibration direction and the amplitude size are judged according to displacement changes of the reflected light beam. When the vibration induction unit generates small deformation due to the inducted vibration, the reflected light beam generates comparably big displacement changes; the comparably big displacement changes are realized in the same way that the vibration inducted by the vibration induction unit is amplified; and the accurate acquisition of the vibration is realized and the accuracy of the vibration measuring is improved.

Description

technical field [0001] The present application relates to the technical field of vibration measurement, in particular to a vibration measurement device and method. Background technique [0002] At present, the accuracy of the vibration measurement device has not been accurate enough, which has affected the promotion of the vibration measurement device. [0003] For example, due to the limitation of vibration measurement accuracy, the existing dynamic microphone recording is inaccurate, which limits the speech recognition technology. Specifically, the working principle of the dynamic microphone is as follows. When sound waves vibrate the diaphragm on the dynamic microphone, the coil connected to the diaphragm vibrates with the diaphragm, and the coil vibrates in the magnetic field. The collection current is generated, the size and defense line of the collection current are changing, and the amplitude and frequency are determined by the sound wave. The collection current is a...

AI Technical Summary

Problems solved by technology

Since the coil is arranged at certain positions on the diaphragm, only the vibration information of a specific position of the diaphragm can be collected, and the vibration of the diaphragm cannot be fully reflected

In addition, the coil is arranged on the diaphragm, which increases the weight of the diaphragm, thereby causing an error in the amplitude of the diaphragm and making the acquisition signal inaccurate; another existing steel ball vibration sensor, by detecting the vibration of the steel ball The vibration generated by the ball, this kind of vibration measurement method also has the phenomenon that the steel ball affects the amplitude of the diaphragm, so there is also the phenomenon of inaccurate signal acquisition

[0004] Through the research on the prior art, the inventor found that: the existing vibration measurement methods all have the problem of poor signal acquisition accuracy

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