Tuning fork type quartz crystal oscillator resonant frequency measurement method based on sound excitation and device

A quartz crystal oscillator and resonant frequency technology, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as harsh electromagnetic environments and inaccurate results, and achieve higher upper limit of working temperature, simple device and low cost Effect

Active Publication Date: 2014-06-25
SHANXI UNIV
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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 curre

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  • Tuning fork type quartz crystal oscillator resonant frequency measurement method based on sound excitation and device
  • Tuning fork type quartz crystal oscillator resonant frequency measurement method based on sound excitation and device
  • Tuning fork type quartz crystal oscillator resonant frequency measurement method based on sound excitation and device

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Embodiment Construction

[0021] A method for measuring the resonant frequency of a tuning fork-type quartz crystal oscillator based on acoustic excitation, comprising the following steps: (a) using sound waves to excite the tuning-fork-type quartz crystal oscillator to be measured, and the frequency of the sound waves is scanned near the natural frequency of the tuning-fork-type quartz crystal oscillator; b) While scanning the frequency of the sound wave, a beam of probe light is introduced to be incident on the outer surface of any vibrating arm of the tuning fork quartz crystal oscillator. The reflected light generated after the probe light hits the outer surface of the vibrating arm is vertical to the plane where the probe light is located plane and the plane is perpendicular to the outer surface of the vibrating arm of the tuning fork quartz crystal oscillator; the angle formed between the probe light and the outer surface of the vibrating arm is 10°~80° (10°, 20°, 30°, 40°, 50°, 60° can be selected...

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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 ...

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Application Information

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IPC IPC(8): G01H9/00
Inventor 武红鹏董磊
Owner SHANXI UNIV
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