Campaniform oscillator type angular rate gyroscope

A technology of angular rate gyroscope and bell-shaped vibrator, which is applied in gyroscope effect for speed measurement, gyroscope/steering sensing equipment, speed/acceleration/shock measurement, etc. Low quality factor and other problems, to achieve the effect of high sensitivity, high quality factor and good structural strength

Inactive Publication Date: 2011-02-09
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of existing gyroscopes, such as poor anti-high overload capability, low quality factor, no power-off self-holding capability, complex structure, strict processing technology requirements, etc., to provide a fused axisymmetric multi-curved surface with variable thickness. The angular rate gyroscope with the bell-shaped structure oscillator as the sensitive element, that is, the bell-shaped oscillator type angular rate gyroscope

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  • Campaniform oscillator type angular rate gyroscope
  • Campaniform oscillator type angular rate gyroscope
  • Campaniform oscillator type angular rate gyroscope

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] The invention utilizes the bell-shaped vibrator to be in a stable four-antinode resonant state under the action of the driving electrode, the Coriolis force causes the vibrator to twist and deform in the circumferential direction, and detects the deformation and displacement of the vibrator through the detection electrode. Since the deformation displacement of the vibrator has a linear relationship with the Coriolis force, the magnitude of the external input angular rate can be calculated by detecting the deformation displacement of the vibrator.

[0032] Working principle of the present invention:

[0033] The vibrator particle works in a resonant state in the X-axis (radial direction):

[0034] x(t)=x 0 sin(ω 1 t) (1)

[0035] In the formula: χ 0 - the maximum displacement of the radial vibration of the vibrator;

[0036] ω 1 - the fundamental...

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Abstract

The invention relates to an angular rate gyroscope which has the variable-thickness axisymmetric multi-curved surface fusion structural feature and takes an oscillator with a campaniform structure as a sensitive element. The angular rate gyroscope consists of the oscillator, an oscillator support structure, an airtight cover, a cylindrical outer frame and a system circuit, wherein the oscillator is made of a quartz material and is machined integrally for forming with a phi-shaped support rod; the upper and the lower ends of the support rod are respectively fixed to the top end of a support cover and the central position of a support base plate; a driving electrode and a vibration mode stable electrode are attached to the support cover; a detection electrode is arranged in the inner space of the campaniform oscillator; the airtight cover and the cylindrical outer frame are sequentially arranged outside a support structure; and the system circuit is positioned between the bottom of the airtight cover and the outer frame. The angular rate gyroscope is suitable for the application field of measuring medium and low-precision angular rate in the high dynamic environment, and the oscillator with the campaniform structure has the high quality factors and high overload capacity resistance and has the characteristics of hold facility during power failure, simple structure, suitability for batch production and the like.

Description

technical field [0001] The invention relates to an angular rate gyroscope, in particular to a bell-shaped vibrator angular rate gyroscope. Background technique [0002] As an inertial device sensitive to the angular motion of the carrier, the gyroscope is the core component of the inertial navigation, guidance and control system. Among them, the vibrating gyroscope represents an important inertial technology and has all the inertial qualities. Vibrating gyroscopes based on the principle of Coriolis force are becoming more and more important in the field of inertial technology, and have been widely valued as a new generation of inertial instruments. Driven by the development of science and technology and market demand, various vibrating gyroscopes have emerged one after another. At present, the vibrating gyroscope mainly has three working modes: hemispherical resonance, piezoelectric vibration and micromechanical vibration. [0003] The hemispherical resonant gyro uses the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/5705
Inventor 付梦印苏中李擎邓志红刘宁张凤萍
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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