CN101285690A - Optical fibre gyroscope magnetic field-temperature sensitivity test method - Google Patents
Optical fibre gyroscope magnetic field-temperature sensitivity test method Download PDFInfo
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- CN101285690A CN101285690A CNA2008100616569A CN200810061656A CN101285690A CN 101285690 A CN101285690 A CN 101285690A CN A2008100616569 A CNA2008100616569 A CN A2008100616569A CN 200810061656 A CN200810061656 A CN 200810061656A CN 101285690 A CN101285690 A CN 101285690A
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- 238000010998 test method Methods 0.000 title claims abstract description 16
- 230000035945 sensitivity Effects 0.000 title claims abstract description 10
- 239000013307 optical fiber Substances 0.000 title claims description 74
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 230000003068 static effect Effects 0.000 claims abstract description 4
- 230000005426 magnetic field effect Effects 0.000 claims description 14
- 239000004065 semiconductor Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 13
- 238000011160 research Methods 0.000 abstract description 6
- 238000013178 mathematical model Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
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Abstract
The invention discloses a test method for the magnetic field and temperature performance of fiber optic gyroscopes. The test method comprises the following main test steps that: a fiber optic gyroscope is horizontally placed on a test platform and rotates in a magnetic field at a constant speed; a computer acquires the output of the fiber optic gyroscope under the action of a static state, a radial magnetic field, an axial magnetic field and different temperature, and respectively tests the output of the fiber optic gyroscope under the combined action of the radial/axial magnetic fields and temperature. The magnetic field and temperature sensitivity of the fiber optic gyroscope can be analyzed through measured magnetic field values, temperature values and corresponding gyroscope output, so as to evaluate the zero-bias stability of the gyroscope under the action of the magnetic fields and temperature, which lays a good solid foundation for building mathematical models later and further carrying out the magnetic field and temperature compensation of the gyroscope. The test method can test the radial/axial magnetic field sensitivity and temperature characteristics of the fiber optic gyroscope, which fills a gap in the research in China.
Description
Technical field
The present invention relates to a kind of optical fibre gyroscope magnetic field-temperature sensitivity test method.
Background technology
Optical fibre gyro is a kind of optical fiber angular-rate sensor based on the Sagnac effect.Magnetic field of optical fibre gyro and temperature are two key factors that influence optical fibre gyroscope output accuracy.The additional non-reciprocal phase relevant with magnetic field is poor because magneto-optic effect, optical fibre gyro produce, and this phase differential changes along with the variation of external magnetic field size and direction, has reduced the zero stability partially of optical fibre gyro, has directly influenced the precision of gyro.Because the Shupe effect of temperature, thermograde becomes when fiber optic coils exists, the refractive index of fiber optic coils every bit changes in time, so the phase change difference of two-beam ripple through causing owing to temperature behind the fiber optic coils, therefore has the situation of zero drift to occur.
Though the at present domestic relevant device that research and evaluation temperature effect are arranged aspect research optical fibre gyroscope magnetic field and magnetic field-temperature overall evaluation system, does not have special-purpose method of testing and equipment, has brought great inconvenience for experiment and research.This patent provides a kind of optical fibre gyroscope magnetic field-temperature sensitivity test method, can test magnetic field easily, the variation of temperature and magnetic field-temperature is to the influence of optical fibre gyro output, thereby the research and the evaluation and test of optical fibre gyroscope magnetic field, temperature and magnetic field-temperature performance have been quickened, for determining the influence relation of magnetic field-temperature later on to gyro, set up mathematical model, and good solid foundation has been laid in the magnetic field-temperature compensation of optical fibre gyro.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of optical fibre gyroscope magnetic field-temperature performance test methods is provided.
The method of testing of optical fibre gyroscope magnetic field-temperature performance may further comprise the steps:
1) optical fibre gyro is placed horizontally at test platform, output when the computer acquisition optical fibre gyro is static;
2) add magnetic field, optical fibre gyro is under the radial magnetic field effect;
3) control optical fibre gyro uniform rotation in magnetic field;
4) measure magnetic field intensity, the output under the radial magnetic field effect of computer acquisition optical fibre gyro all directions by Hall element;
5) after test a period of time, optical fibre gyro stops operating, and optical fibre gyro turns over 90 degree by the vertical level direction, and at this moment, optical fibre gyro is under the axial magnetic field effect;
6) according to step 3), step 4), magnetic field is closed in the output under the axial magnetic field effect of computer acquisition optical fibre gyro all directions;
7) it is 0 ℃～60 ℃ by semiconductor cooler control optical fibre gyro working temperature;
8) by temperature sensor real-time testing temperature value, the output of computer acquisition optical fibre gyro under the different temperatures environment;
9) according to step 2), step 3), step 7), step 8), under test radial magnetic field and the temperature acting in conjunction, the output of optical fibre gyro.
10) according to step 5), step 7), step 8), under test axial magnetic field and the temperature acting in conjunction, the output of optical fibre gyro.
The described magnetic field that adds is that optical fibre gyro is placed the Helmholtz coil, the uniform magnetic field that is positioned at the hub of a spool place is provided by the Helmholtz coil, control the size of uniform magnetic field by the electric current that changes direct current steady power supply, change the direction in magnetic field by the polarity that changes power supply.
The uniform rotation in magnetic field of described control optical fibre gyro is to realize that by stepper motor stepper motor turns over the θ angle, and gyro also turns over corresponding angle θ, controls the angle position of gyro with this.
Describedly measure magnetic field intensity by Hall element and be to use a driven by motor Hall element to rotate, the maximum value of magnetic field that records is magnetic field intensity.
The beneficial effect that the present invention compared with prior art has: (1) this method of testing can measuring fiber gyro radial magnetic field sensitivity, and it is stable partially to estimate radial magnetic field effect optical fibre gyro down zero, has filled up the blank of domestic this research; (2) this method of testing can be applied to the measuring fiber gyroaxis to magnetic-field-sensitive characteristic and temperature characterisitic.
Description of drawings
Accompanying drawing is the principle schematic of optical fibre gyroscope magnetic field-temperature performance test methods, among the figure: 1. optical fibre gyro 2. semiconductor transducers 3. rotatable platform 4.Helmholtz coils
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in drawings, turntable horizontal positioned at first, optical fibre gyro is placed on it, and turntable and optical fibre gyro relative fixed make the complete level of optical fibre gyro that guarantees.This moment, whole test system was in the middle of the uniform magnetic field, and optical fibre gyro is under the radial magnetic field effect.Semiconductor cooler is placed on the turntable, can control temperature variation.Therefore this method of testing can the measuring fiber gyro with temperature, the output of the variation of magnetic field and magnetic field-temperature, data output to host computer.Handle by data, analyze the performance impact of magnetic field temperature on fiber gyro host computer.
The method of testing of optical fibre gyroscope magnetic field-temperature performance may further comprise the steps:
1) optical fibre gyro is placed horizontally at test platform, output when the computer acquisition optical fibre gyro is static;
2) add magnetic field, optical fibre gyro is under the radial magnetic field effect;
3) control optical fibre gyro uniform rotation in magnetic field;
4) measure magnetic field intensity, the output under the radial magnetic field effect of computer acquisition optical fibre gyro all directions by Hall element;
5) after test a period of time, optical fibre gyro stops operating, and optical fibre gyro turns over 90 degree by the vertical level direction, and at this moment, optical fibre gyro is under the axial magnetic field effect;
6) according to step 3), step 4), magnetic field is closed in the output under the axial magnetic field effect of computer acquisition optical fibre gyro all directions;
7) it is 0 ℃～60 ℃ by semiconductor cooler control optical fibre gyro working temperature;
8) by temperature sensor real-time testing temperature value, the output of computer acquisition optical fibre gyro under the different temperatures environment;
9) according to step 2), step 3), step 7), step 8), under test radial magnetic field and the temperature acting in conjunction, the output of optical fibre gyro.
10) according to step 5), step 7), step 8), under test axial magnetic field and the temperature acting in conjunction, the output of optical fibre gyro.
The described magnetic field that adds is that optical fibre gyro is placed the Helmholtz coil.Magnetic field is produced by the Helmholtz coil, and it provides the uniform magnetic field that is positioned at hub of a spool, can control the size of uniform magnetic field by the electric current that changes direct current steady power supply, changes the direction in magnetic field by the polarity that changes power supply.In the experiment, place about the Helmholtz coil, the magnetic field of generation is horizontal direction.Optical fibre gyro is positioned at coil central authorities, guarantees that it is in the uniform magnetic field, and can not place magnetic conductive component in the Helmholtz coil, so that uniform magnetic field is not subjected to the influence of magnetic conductive component.
The uniform rotation in magnetic field of described control optical fibre gyro is to realize that by stepper motor stepper motor turns over the θ angle, and gyro also turns over corresponding angle θ, controls the angle position of gyro with this, can come the control step motor by pwm circuit.
Describedly measure magnetic field intensity by Hall element and be to use a driven by motor Hall element to rotate, the maximum value of magnetic field that records is magnetic field intensity.Hall element is to the magnetic-field component sensitivity perpendicular to its induction zone, the direction that can not guarantee its induction zone is just vertical with magnetic direction, need to rotate Hall element, its maximum value of magnetic field that records is magnetic field intensity, and this moment, the induction zone position was perpendicular to surface level.So use a driven by motor Hall element to rotate.
Claims (4)
1, a kind of method of testing of optical fibre gyroscope magnetic field-temperature performance is characterized in that may further comprise the steps:
1) optical fibre gyro is placed horizontally at test platform, output when the computer acquisition optical fibre gyro is static;
2) add magnetic field, optical fibre gyro is under the radial magnetic field effect;
3) control optical fibre gyro uniform rotation in magnetic field;
4) measure magnetic field intensity, the output under the radial magnetic field effect of computer acquisition optical fibre gyro all directions by Hall element;
5) after test a period of time, optical fibre gyro stops operating, and optical fibre gyro turns over 90 degree by the vertical level direction, and at this moment, optical fibre gyro is under the axial magnetic field effect;
6) according to step 3), step 4), magnetic field is closed in the output under the axial magnetic field effect of computer acquisition optical fibre gyro all directions;
7) it is 0 ℃～60 ℃ by semiconductor cooler control optical fibre gyro working temperature;
8) by temperature sensor real-time testing temperature value, the output of computer acquisition optical fibre gyro under the different temperatures environment;
9) according to step 2), step 3), step 7), step 8), under test radial magnetic field and the temperature acting in conjunction, the output of optical fibre gyro.
10) according to step 5), step 7), step 8), under test axial magnetic field and the temperature acting in conjunction, the output of optical fibre gyro.
2, the method for testing of a kind of optical fibre gyroscope magnetic field-temperature performance according to claim 1, it is characterized in that: the described magnetic field that adds is that optical fibre gyro is placed the Helmholtz coil, the uniform magnetic field that is positioned at the hub of a spool place is provided by the Helmholtz coil, control the size of uniform magnetic field by the electric current that changes direct current steady power supply, change the direction in magnetic field by the polarity that changes power supply.
3, a kind of optical fibre gyroscope magnetic field-temperature sensitivity test method according to claim 1, it is characterized in that: the uniform rotation in magnetic field of described control optical fibre gyro is to realize by stepper motor, stepper motor turns over the θ angle, gyro also turns over corresponding angle θ, controls the angle position of gyro with this.
4, a kind of optical fibre gyroscope magnetic field-temperature sensitivity test method according to claim 1, it is characterized in that: describedly measure magnetic field intensity by Hall element and be to use a driven by motor Hall element to rotate, the maximum value of magnetic field that records is magnetic field intensity.
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| CN2008100616569A CN101285690B (en) | 2008-05-26 | 2008-05-26 | Optical fibre gyroscope magnetic field-temperature sensitivity test method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769761B (en) * | 2010-01-29 | 2012-05-23 | 浙江大学 | Device for testing radial magnetic field sensitivity of fiber optic gyro |
| 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 |
| CN103575295A (en) * | 2012-07-27 | 2014-02-12 | 中国航空工业第六一八研究所 | Inertial element magnetic-field sensitivity measuring system |
| CN103712634A (en) * | 2013-12-24 | 2014-04-09 | 浙江大学 | Vibration-magnetic field cross-coupling degree measurement method for fiber-optic gyroscope |
| CN106032992A (en) * | 2015-03-19 | 2016-10-19 | 北京自动化控制设备研究所 | Apparatus and method for measuring magnetic field sensitivity of fiber optic gyroscope in full temperature scope |
| CN106772134A (en) * | 2017-03-01 | 2017-05-31 | 中国科学院武汉物理与数学研究所 | A kind of apparatus and method of automatic field compensation |
| CN110146109A (en) * | 2019-05-17 | 2019-08-20 | 浙江大学 | A kind of two-dimentional compensation method of optical fibre gyro magnetic temperature crosslinking coupling error |
| CN113865577A (en) * | 2021-10-26 | 2021-12-31 | 北京天兵科技有限公司 | Fiber-optic gyroscope, and magnetic temperature cross-linking coupling error sectional compensation method and system |
| CN113865576A (en) * | 2021-10-26 | 2021-12-31 | 北京天兵科技有限公司 | Optical fiber gyroscope based on interpolation, magnetic temperature cross-linking coupling error compensation method and system |
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| CN106441368B (en) * | 2016-10-25 | 2019-02-22 | 浙江大学 | A kind of optical fibre gyro optical fiber circumstance temperature becomes characteristic measurement method and device |
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| CN100368774C (en) * | 2005-06-07 | 2008-02-13 | 中国航天时代电子公司 | Engineering implementation method for quick starting inertial measurement unit of optical fiber gyroscope and guaranteeing precision |
| CN100458475C (en) * | 2007-03-29 | 2009-02-04 | 浙江大学 | Estimation method for performance of depolarized optical fiber gyro depolarizer |
| CN101105422B (en) * | 2007-07-30 | 2010-04-21 | 浙江大学 | Depolarizer performance accurate estimation method |
| CN101109637A (en) * | 2007-08-21 | 2008-01-23 | 浙江大学 | Method for improving zero bias temperature sensitivity of optical fiber gyroscope |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769761B (en) * | 2010-01-29 | 2012-05-23 | 浙江大学 | Device for testing radial magnetic field sensitivity of fiber optic gyro |
| CN103575295A (en) * | 2012-07-27 | 2014-02-12 | 中国航空工业第六一八研究所 | Inertial element magnetic-field sensitivity measuring system |
| 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 |
| CN103712634A (en) * | 2013-12-24 | 2014-04-09 | 浙江大学 | Vibration-magnetic field cross-coupling degree measurement method for fiber-optic gyroscope |
| 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 |
| CN106032992A (en) * | 2015-03-19 | 2016-10-19 | 北京自动化控制设备研究所 | Apparatus and method for measuring magnetic field sensitivity of fiber optic gyroscope in full temperature scope |
| CN106772134A (en) * | 2017-03-01 | 2017-05-31 | 中国科学院武汉物理与数学研究所 | A kind of apparatus and method of automatic field compensation |
| CN106772134B (en) * | 2017-03-01 | 2019-05-21 | 中国科学院武汉物理与数学研究所 | A kind of apparatus and method of automatic field compensation |
| CN110146109A (en) * | 2019-05-17 | 2019-08-20 | 浙江大学 | A kind of two-dimentional compensation method of optical fibre gyro magnetic temperature crosslinking coupling error |
| CN113865577A (en) * | 2021-10-26 | 2021-12-31 | 北京天兵科技有限公司 | Fiber-optic gyroscope, and magnetic temperature cross-linking coupling error sectional compensation method and system |
| CN113865576A (en) * | 2021-10-26 | 2021-12-31 | 北京天兵科技有限公司 | Optical fiber gyroscope based on interpolation, magnetic temperature cross-linking coupling error compensation method and system |
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| CN101285690B (en) | 2010-06-02 |
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Inventor after: Lv Xinwei Inventor after: Zhang Dengwei Inventor after: Cheng Laifu Inventor after: Chen Xiaojie Inventor after: Shu Xiaowu Inventor before: Cheng Laifu Inventor before: Zhang Dengwei Inventor before: Shu Xiaowu |
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Free format text: CORRECT: INVENTOR; FROM: CHENG LAIFU ZHANG DENGWEI SHU XIAOWU TO: LV XINWEI ZHANG DENGWEI CHENG LAIFU CHEN XIAOJIE SHU XIAOWU |
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Granted publication date: 20100602 Termination date: 20140526 |