Method and device for measuring resonant frequency of tuning fork quartz crystal oscillator based on optical 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 optical excitation and a device. The technical problem that the outside electromagnetic environment easily influences measurement and 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 optical 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 laser beam intensity modulation frequency; (c) acquiring reflection light intensity change information received by one receiving face 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 optical excitation, environmental noise 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 resonance frequency of a tuning fork type quartz crystal oscillator, in particular to a method and device for measuring the resonance frequency of a tuning fork type quartz crystal oscillator based on light excitation. Background technique [0002] Tuning fork type 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" shaped. This kind of quartz tuning fork has been widely used since its introduction due to its stable resonance frequency, small size, high quality factor, low price and long service life. 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 fields of tuning fork quartz crystal oscillators to high-precision gas d...

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 light excitation to solve the technical problem that the current measurement of the natural frequency of the tuning-fork quartz crystal oscillator is easily affected by the harsh external electromagnetic environment, resulting in inaccurate results.

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