Liquid floated rotor type micro gyroscope based on super-hydrophobic effect

A super-hydrophobic and rotor technology, applied in the direction of rotating gyroscopes, etc., can solve the problem that the control of the gyro rotor is difficult to achieve, and achieve the effect of small rotation resistance, simple process and high stability

Inactive Publication Date: 2010-07-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the traditional suspended rotor gyroscope uses electromagnetic force or electrostatic force to levitate the rotor, coupled with the driving force to make it rotate, the control of the gyro rotor becomes difficult to achieve.

Method used

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  • Liquid floated rotor type micro gyroscope based on super-hydrophobic effect
  • Liquid floated rotor type micro gyroscope based on super-hydrophobic effect

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Example 1: When there is no external angular velocity input, the rotor rotates smoothly without deflection. Therefore, the equivalent detection capacitance value will not change, and the differential detection output is zero, indicating that there is no external angular velocity input.

example 2

[0019] Example 2: When there is an external angular velocity input along the X axis, the rotor will deflect under the action of Coriolis force. If the rotor rotates at a high speed in the counterclockwise direction, the velocity V of the particle on the left side relative to the rotor is along the positive Y direction, and it will be deflected upward by the Coriolis force in the Z direction. As a result, the distance between the plates of the upper left and lower right detection capacitors decreases, and the capacitance increases; similarly, the distance between the plates of the upper right and lower left detection capacitors increases, and the capacitance decreases. After differential detection, the capacitance change corresponds to the external angular velocity input.

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Abstract

The invention provides a liquid floated rotor type micro gyroscope based on super-hydrophobic effect, which comprises a sealing cavity of which the inner wall surface has super-hydrophilic effect, wherein the cavity is filled with high-purity deionized water; a circular magnetic rotor of which the surface has hydrophobic effect is suspended in the middle of the high-purity deionized water; a stator and a detection electrode are installed outside the sealing cavity; the stator generates magnetic drive signals to drive the magnetic rotor to rotate at high speed in the sealing cavity; and the detection electrode can detect a deflection angle generated by additional angular speed when the rotor rotates at high speed. A layer of gas film is formed on the surface of the rotor because of super-hydrophobic effect and is suspended in the high-purity deionized water, thereby greatly reducing the resistance when the rotor rotates at high speed and improving the sensitivity and the accuracy of the micro gyroscope. The invention has the advantages of small rotation resistance of the sensor rotor, high stability, high sensitivity, easy processing, and the like.

Description

[0001] (1) Field [0002] The invention relates to a sensor structure, specifically a super-hydrophobic and super-hydrophilic effect to realize the suspension of the rotor by the surface tension of the liquid, an electromagnetic drive to increase the driving force, and a capacitance detection force to improve the detection accuracy. (2) Background technology [0003] A gyroscope is a sensing device that measures the angle or angular rate of an object relative to inertial space. As early as 1852, the French scientist Foucault produced a huge single pendulum top, which successfully demonstrated the phenomenon of the earth's rotation. Since the gyroscope has the ability of autonomous navigation in any environment, it has been widely used in the fields of aviation, spaceflight, navigation and military since its inception, and has always been a key technology developed by various countries. [0004] In recent years, people began to pay attention to the suspended rotor micro-gyrosc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/02G01C19/14
Inventor 刘晓为陈伟平尹亮赵振刚董长春
Owner HARBIN INST OF TECH
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