CN101769761B - Device for testing radial magnetic field sensitivity of fiber optic gyro - Google Patents
Device for testing radial magnetic field sensitivity of fiber optic gyro Download PDFInfo
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- CN101769761B CN101769761B CN2010101047331A CN201010104733A CN101769761B CN 101769761 B CN101769761 B CN 101769761B CN 2010101047331 A CN2010101047331 A CN 2010101047331A CN 201010104733 A CN201010104733 A CN 201010104733A CN 101769761 B CN101769761 B CN 101769761B
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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
The present invention relates to a kind of proving installation of radial magnetic field sensitivity of fiber optic gyro.
Background technology
Optical fibre gyro is based on the Sagnac effect, a kind of sensor responsive to angular speed and angular displacement, and it is fast to have a response, and integrated, characteristics such as environmental suitability is strong are grown, made easily, are easy to highly sensitive, the life-span.In the practical application, optical fibre gyro receives the interference of environment, produces signal drift, and precision receives very big influence.External magnetic field is the key factor that influences the optical fibre gyro precision; Because the existence of magneto-optic effect, the polarization state of light wave is influenced by external magnetic field and changes in the optical fibre gyro, causes the non-reciprocal phase phase drift; Produce phase differential; This phase differential changes with size, the direction of external magnetic field, influences the zero stable partially of optical fibre gyro, and the precision of optical fibre gyro is had a direct impact.
In order further to improve the precision of optical fibre gyro, need to reduce the influence of magnetic field to optical fibre gyro output.So want the magnetic field sensitivity of measuring optical fiber gyro.Theoretical and experiment shows; The radial magnetic field sensitivity of optical fibre gyro and the size and Orientation of external magnetic field have relation, thus in measurement, need constantly to change the direction in magnetic field, and it is relatively heavier to be used for producing the Helmholtz coil in magnetic field; Be not suitable for frequently changing the position; So generally in measurement, will constantly rotate optical fibre gyro,, and require stability of rotation with the direction of change optical fibre gyro with respect to magnetic field; The angle of rotating can accurately be located, and also need in measuring process, keep Distribution of Magnetic Field even simultaneously.In addition, because the radial magnetic field sensitivity of measuring optical fiber gyro need be done a large amount of experiments, need device to measure fast.Do not satisfy the above proving installation that requires in the current prior art, so be badly in need of the radial magnetic field sensitivity that a kind of device that can accurately control the optical fibre gyro rotational angle, measure fast comes the measuring optical fiber gyro.
Summary of the invention
The proving installation that the purpose of this invention is to provide a kind of radial magnetic field sensitivity of fiber optic gyro.
What the present invention realized technical scheme that above-mentioned purpose is taked is: bearing seat, first motor and second motor that the proving installation of this radial magnetic field sensitivity of fiber optic gyro mainly comprises turntable, support, is fixedly connected with support; The rotating shaft of said turntable is installed together with support and bearing seat respectively through rolling bearing; Between the installation place of rotating shaft and support, bearing seat, driving-belt is installed also; Said rotating shaft connects with the driving shaft of first motor through this driving-belt; The driving shaft of second motor is through shaft coupling second rotating shaft that has been fixedly connected, and said second rotating shaft is installed with Hall element.
Further, first motor according to the invention is stepper motor or servomotor.
Compared with prior art, the invention has the beneficial effects as follows: (1) to aspect the research of optical fibre gyro output influence, not having special-purpose testing apparatus in magnetic field at present, proving installation of the present invention is the radial magnetic field sensitivity of measuring optical fiber gyro very easily.(2) first motors use stepper motor or servomotor, can accurately control the angle that turntable rotates, accurately the location.Use driving-belt to carry out transmission between the rotating shaft of (3) first motors and turntable, can first motor be placed outside the magnetic field, reduce of the influence of first motor magnetic field.(4) proving installation of the present invention is except that motor and bearing, and miscellaneous part all uses aluminum to do, and to reduce the influence of material to Distribution of Magnetic Field, makes Distribution of Magnetic Field even.(5) between the installation place of support and bearing seat, driving-belt is installed, can be made the turntable stability of rotation.(6) use Hall element, only need Hall element to rotate a week and can obtain the magnetic induction density in optical fibre gyro magnetic field of living in, improved measuring speed.
Description of drawings
Fig. 1 is the broken section structural representation of the proving installation of radial magnetic field sensitivity of fiber optic gyro of the present invention.
Fig. 2 is the structural representation of the rotating shaft of turntable of the present invention.
Fig. 3 is the structural representation of the work top of turntable of the present invention.
Fig. 4 is the assembling synoptic diagram of the present invention's first motor and support.
Fig. 5 is the assembling synoptic diagram of the present invention's second motor and support.
Among the figure: 1. first motor, the 2. work top of turntable, the 3. rotating shaft of turntable, 4. shaft coupling, 5. driving-belt, 6. second motor; 7. bearing seat, 8. second rotating shaft, 9. support, 10. rolling bearing, 11. Hall elements, 12. shaft shoulders; 13. square spindle nose, 14. axle collars, 15. shaft shoulders, 16. threaded holes, 17. square holes, 18. bolts; 19. lock-screw, 20. step belt pulleys, 21. circular holes, 22. screws, 23. belt pulleys, 24. rolling bearings
Embodiment
As shown in Figure 1, proving installation of the present invention has a support 9, on support 9, is installed with a bearing seat 7.As shown in Figures 2 and 3, the work top 2 of turntable is provided with threaded hole 16, is used for fixing optical fibre gyro.The rotating shaft 3 of turntable is a multidiameter, is provided with square spindle nose 13 in the upper end of rotating shaft 3, can with the center of the work top 2 of turntable square hole 17 closely cooperate.The shaft shoulder 12 of rotating shaft 3 is used for the work top 2 of spacing turntable, and the rotating shaft 3 of turntable is installed together through rolling bearing 10 and support 9 near an end of the work top 2 of turntable; The other end of this rotating shaft 3 is installed together through rolling bearing 24 and bearing seat 7, but the shaft shoulder 15 axial limiting rotating shafts 3 that rotating shaft 3 should be held.
As shown in Figure 4, first motor 1 is fixed on the support 9 through bolt 18.First motor uses stepper motor or servomotor can accurately control the angle that turntable rotates, to realize accurate location.Step belt pulley 20 cooperates with the driving shaft of first motor 1, carries out radial location through lock-screw 19.
Like Fig. 1 and shown in Figure 5, second motor 6 is fixed on the support 9 through screw 22.Support 9 is provided with circular hole 21, so that the driving shaft of second motor 6 passes from circular hole 21.The driving shaft of second motor 6 is fixedly connected through the shaft coupling 4 and second rotating shaft 8.Be installed with Hall element 11 in second rotating shaft 8, this Hall element 11 is used for the magnetic induction density of the residing radial magnetic field of measuring optical fiber gyro.For making Hall element 11 can realize accurate measurement, when using proving installation of the present invention, Hall element 11 is in the magnetic field that the Helmholtz coil produces.Make Hall element 11 as far as possible near optical fibre gyro, then can further improve measuring accuracy.
When using apparatus of the present invention to measure, earlier optical fibre gyro is fixed on the work top 2 of turntable, again whole testing device is put into uniform magnetic field.Magnetic field can be produced by the Helmholtz coil, and it produces the uniform magnetic field that is positioned at hub of a spool.During test, the magnetic field that coil is produced is horizontal direction, and optical fibre gyro should be positioned at coil central authorities simultaneously.In order to reduce the interference that motor produces magnetic field, first motor 1 will be positioned over the coil outside.Start optical fibre gyro, after optical fibre gyro output by the time is stable, 1 uniform rotation of first motor, through the magnetic induction density in Hall element 11 measurement magnetic fields, the output of computer acquisition optical fibre gyro under radial magnetic field effect on all directions.
Claims (2)
1. the proving installation of a radial magnetic field sensitivity of fiber optic gyro; It is characterized in that: the bearing seat (7), first motor (1) and second motor (6) that comprise turntable, support (9), be fixedly connected with support (9); The rotating shaft of said turntable (3) is installed together with support (9) and bearing seat (7) respectively through rolling bearing; Between the installation place of rotating shaft (3) and support (9), bearing seat (7), driving-belt (5) is installed also; Said rotating shaft (3) connects with the driving shaft of first motor (1) through this driving-belt (5), and the driving shaft of second motor (6) is through shaft coupling (4) second rotating shaft (8) that has been fixedly connected, and said second rotating shaft (8) is installed with Hall element (11).
2. the proving installation of a kind of radial magnetic field sensitivity of fiber optic gyro according to claim 1, it is characterized in that: said first motor (1) is stepper motor or servomotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101047331A CN101769761B (en) | 2010-01-29 | 2010-01-29 | Device for testing radial magnetic field sensitivity of fiber optic gyro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101047331A CN101769761B (en) | 2010-01-29 | 2010-01-29 | Device for testing radial magnetic field sensitivity of fiber optic gyro |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101769761A CN101769761A (en) | 2010-07-07 |
| CN101769761B true CN101769761B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101047331A Expired - Fee Related CN101769761B (en) | 2010-01-29 | 2010-01-29 | Device for testing radial magnetic field sensitivity of fiber optic gyro |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575295B (en) * | 2012-07-27 | 2016-06-01 | 中国航空工业第六一八研究所 | A kind of inertial element magnetic-field sensitivity measuring system |
| CN103090881A (en) * | 2012-12-25 | 2013-05-08 | 陕西宝成航空仪表有限责任公司 | Galvanical solenoid for fiber optic gyroscope magnetic influence system |
| CN103712634B (en) * | 2013-12-24 | 2016-04-13 | 浙江大学 | The measuring method of optical fibre gyro vibration-magnetic field degree of cross-linking |
| CN103968857A (en) * | 2014-03-20 | 2014-08-06 | 中国人民解放军军械工程学院 | Fiber-optic gyroscopemagnetic susceptibility testing system |
| CN110849395A (en) * | 2019-11-21 | 2020-02-28 | 衡阳市和仲通讯科技有限公司 | Support for testing optical fiber gyroscope |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1622842A (en) * | 2002-02-28 | 2005-06-01 | 纽马格尼蒂克斯公司 | Bi-axial rotating magnetic therapeutic device |
| CN101285690A (en) * | 2008-05-26 | 2008-10-15 | 浙江大学 | Optical fibre gyroscope magnetic field-temperature sensitivity test method |
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2010
- 2010-01-29 CN CN2010101047331A patent/CN101769761B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1622842A (en) * | 2002-02-28 | 2005-06-01 | 纽马格尼蒂克斯公司 | Bi-axial rotating magnetic therapeutic device |
| CN101285690A (en) * | 2008-05-26 | 2008-10-15 | 浙江大学 | Optical fibre gyroscope magnetic field-temperature sensitivity test method |
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| CN101769761A (en) | 2010-07-07 |
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