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Device for testing radial magnetic field sensitivity of fiber optic gyro

A technology of radial magnetic field and fiber optic gyroscope, applied in the direction of measuring devices, instruments, etc., to achieve the effect of reducing influence, uniform distribution of magnetic field, and improving measurement speed

Inactive Publication Date: 2010-07-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no test device that meets the above requirements in the current prior art, so there is an urgent need for a device that can accurately control the rotation angle of the fiber optic gyroscope and measure quickly to measure the radial magnetic field sensitivity of the fiber optic gyroscope

Method used

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  • Device for testing radial magnetic field sensitivity of fiber optic gyro
  • Device for testing radial magnetic field sensitivity of fiber optic gyro
  • Device for testing radial magnetic field sensitivity of fiber optic gyro

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Experimental program
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Embodiment Construction

[0014] Such as figure 1 As shown, the testing device of the present invention has a bracket 9 on which a bearing seat 7 is fixedly installed. Such as figure 2 with image 3 As shown, the working surface 2 of the turntable is provided with threaded holes 16 for fixing the fiber optic gyroscope. The rotating shaft 3 of the turntable is a stepped shaft, and the upper end of the rotating shaft 3 is provided with a square shaft head 13, which can be closely matched with the square hole 17 in the center of the work surface 2 of the turntable. The shoulder 12 of the rotating shaft 3 is used to limit the working table surface 2 of the turntable. One end of the rotating shaft 3 of the rotating table close to the working table surface 2 of the turntable is installed together with the bracket 9 through the rolling bearing 10; the other end of the rotating shaft 3 is connected with the bearing seat through the rolling bearing 24 7 installed together, the shaft shoulder 15 at this end ...

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Abstract

The invention discloses a device for testing radial magnetic field sensitivity of a fiber optic gyro, mainly comprising a rotary table, a support, a bearing pedestal fixedly connected with the support, a first electrical machine and a second electrical machine; wherein a revolving shaft of the rotary table is respectively arranged with the support and the bearing pedestal by a rolling bearing, a driving band is arranged at the position where the revolving shaft, the support and the bearing pedestal are arranged, the revolving shaft is connected with a driving shaft of the first electrical machine by the driving band, the driving shaft of the second electrical machine is fixedly connected with a second revolving shaft by a shaft coupler, the second revolving shaft is fixedly provided with a Hall sensor. The device of the invention can be employed to fast test radial magnetic field sensitivity of a fiber optic gyro, features low cost, simple structure, easy adjustment, convenient operation and accurate and reliable testing.

Description

technical field [0001] The invention relates to a test device for the radial magnetic field sensitivity of an optical fiber gyroscope. Background technique [0002] Fiber optic gyro is a sensor sensitive to angular rate and angular deviation based on the Sagnac effect. It has the characteristics of fast response, high sensitivity, long life, easy manufacture, easy integration, and strong environmental adaptability. In practical applications, the fiber optic gyro is disturbed by the environment, resulting in signal drift, and the accuracy is greatly affected. The external magnetic field is an important factor affecting the accuracy of the fiber optic gyroscope. Due to the existence of the magneto-optical effect, the polarization state of the light wave in the fiber optic gyroscope changes due to the influence of the external magnetic field, causing non-reciprocal phase drift and phase difference. The size and direction of the magnetic field change, which affects the zero bia...

Claims

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Application Information

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IPC IPC(8): G01C25/00
Inventor 张登伟华琪车双良舒晓武刘承
Owner ZHEJIANG UNIV
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