Method and device for measuring resonant frequency of tuning fork quartz crystal oscillator based on acoustic excitation

Abstract

The invention relates to a tuning fork type quartz crystal oscillator resonant frequency measurement technology, in particular to a tuning fork type quartz crystal oscillator resonant frequency measurement method based on sound excitation and a device. The technical problem that the outside electromagnetic environment and measurement spaces easily limit measurement and accordingly enables a result to be inaccurate when inherent frequency of an existing tuning fork type quartz crystal oscillator is measured is solved. The tuning fork type quartz crystal oscillator resonant frequency measurement method based on sound excitation comprises the following steps of (a) adopting laser beams to perform excitation on the tuning fork type quartz crystal oscillator to be measured; (b) introducing a probe beam while scanning the sound wave frequency; (c) acquiring reflection light intensity change information received by one receiving face fixed at a spatial position and converting the intensity change into a corresponding electrical signal; (d) demodulating the electrical signal of reflection light and obtaining the inherent frequency of the tuning fork type quartz crystal oscillator to be measured according to a frequency response curve. By adopting the tuning fork type quartz crystal oscillator resonant frequency measurement method based on the sound excitation, electromagnetic signal interference is effectively avoided, and the probe problem in a narrow space is solved.

Description

technical field [0001] The invention relates to a technique for measuring the resonant frequency of a tuning fork type quartz crystal oscillator, in particular to a method and device for measuring the resonant frequency of a tuning fork type quartz crystal oscillator based on acoustic excitation. Background technique [0002] The tuning fork quartz crystal oscillator is a quartz crystal resonator made of quartz material with piezoelectric effect, such as figure 1 As shown, its appearance is "Y" shape. Since the appearance of this quartz tuning fork, it has been widely used due to its stable resonance frequency, small size, high quality factor, low price, long service life and many other advantages. Especially in recent years, the rapid development of quartz tuning fork enhanced photoacoustic spectroscopy technology, scanning probe microscope technology and microchemical analysis technology has further broadened the application field of tuning fork quartz crystal oscillator ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method and device for measuring the resonant frequency of a tuning-fork quartz crystal oscillator based on acoustic excitation to solve the technical problem that the current measurement of the natural frequency of the tuning-fork-type quartz crystal oscillator is easily affected by the harsh external electromagnetic environment and high temperature, resulting in inaccurate results.

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