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Piezoelectric excitation device for bare quartz vibrator and test device and method for quality factor

A technology of quartz oscillator and excitation device, which is used in measurement devices, surveying and navigation, speed measurement by gyro effect, etc.

Active Publication Date: 2021-05-28
武汉华中旷腾光学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems existing in the prior art, the present invention provides a piezoelectric excitation device for a bare quartz vibrator and a quality factor testing device and method to solve the defects in the excitation method in the prior art

Method used

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  • Piezoelectric excitation device for bare quartz vibrator and test device and method for quality factor
  • Piezoelectric excitation device for bare quartz vibrator and test device and method for quality factor
  • Piezoelectric excitation device for bare quartz vibrator and test device and method for quality factor

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Embodiment 1

[0048]Embodiment 1 provided by the present invention is a structural block diagram of a piezoelectric excitation device for a bare quartz vibrator provided by the present invention, as figure 1 Shown is a structural schematic diagram of an embodiment of a quality factor testing device for a bare quartz vibrator provided by the present invention.

[0049] A piezoelectric excitation device for a bare quartz oscillator provided by the present invention includes an excitation head 1 and an excitation head fixing device 2 that are fixedly connected.

[0050] The excitation head fixing device 2 is provided with an electrical interface and a piezoelectric material. After receiving the excitation signal through the electrical interface, the excitation head 1 is made to vibrate through the piezoelectric material. After the excitation head 1 vibrates, it drives the quartz vibrator 3 to vibrate.

[0051] Such as figure 2 Shown is a partial cross-sectional view of a piezoelectric excita...

Embodiment 2

[0060] Embodiment 2 provided by the present invention is a structural schematic diagram of a quality factor testing device for a bare quartz vibrator provided by the present invention. figure 1 It can be seen that an embodiment of a quality factor testing device for a bare quartz vibrator provided by the present invention includes: a piezoelectric excitation device, a laser vibrometer 4 and a clamping device 5 for a quartz vibrator. Wherein, the piezoelectric excitation device is a piezoelectric excitation device provided in Embodiment 1 above.

[0061] The piezoelectric excitation device includes an excitation head 1 and an excitation head fixing device 2 which are fixedly connected.

[0062] The excitation head fixing device 2 is provided with an electrical interface and a piezoelectric material. After receiving a driving signal through the electrical interface, the excitation head 1 is vibrated through the piezoelectric material. After the excitation head 1 vibrates, it dri...

Embodiment 3

[0076] Embodiment 3 provided by the present invention is an embodiment of a quality factor testing method for a bare quartz vibrator provided by the present invention. The method is based on the quality factor testing device for a bare quartz vibrator provided in Example 2. The quality factor Q value Defined as: 2π times the ratio of the energy stored in an oscillating system to the energy lost in each cycle. The higher the Q value of the hemispherical resonator, the smaller the energy loss, and only a small amount of energy can be added to maintain the stable standing wave vibration of the resonator. In order to accurately test the quality factor of the quartz resonator, the following calculation elements must be realized:

[0077] (1) Test the resonance frequency of the harmonic oscillator;

[0078] (2) The harmonic oscillator starts to vibrate, and has sufficient vibration amplitude and high enough signal-to-noise ratio;

[0079] (3) Calculate the decay time τ according to...

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Abstract

The invention relates to a piezoelectric excitation device of a bare quartz vibrator and a quality factor testing device and method, and improves the excitation method of a quartz resonator. The piezoelectric excitation device includes a fixedly connected excitation head and an excitation head fixing device; An electrical interface and a piezoelectric material are provided, and after the excitation signal is received through the electrical interface, the excitation head is vibrated through the piezoelectric material, and the vibration of the excitation head drives the vibration of the quartz vibrator to be measured. In order to ensure that the harmonic oscillator is effectively excited under different vacuum degrees and before metallization, the amplitude and frequency of the vibration can be flexibly adjusted by controlling the excitation signal, and the initial excitation of the large displacement of the bare harmonic oscillator can be realized. The structure and implementation process are simple and can be carried out fixed-point incentives.

Description

technical field [0001] The invention relates to the technical field of hemispherical resonant gyroscopes, in particular to a piezoelectric excitation device for a bare quartz vibrator and a quality factor testing device and method. Background technique [0002] Hemispherical Resonator Gyro (HRG) is a vibrating gyro without high-speed rotor and movable support, which has the characteristics of high precision, small mass, small size, short start-up time, high overload and high reliability. Known as the most potential Gothic vibrating top. The working principle of HRG is based on the Gothic effect produced when the hemispherical shell harmonic oscillator rotates around the central axis, so that its mode shape precesses relative to the object in the ring direction. [0003] The mechanical quality factor (Q value) of the quartz vibrator is one of the important performance parameters of the vibrating gyroscope. The structure of the hemispherical resonator is characterized by a ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G01C19/5705G01C19/5783
CPCG01C19/5705G01C19/5783G01C25/005
Inventor 王鹏张熙张红波
Owner 武汉华中旷腾光学科技有限公司
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