CN101750058A - Optical fiber gyroscope with centre wavelength monitoring and regulating function - Google Patents
Optical fiber gyroscope with centre wavelength monitoring and regulating function Download PDFInfo
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- CN101750058A CN101750058A CN200810218291A CN200810218291A CN101750058A CN 101750058 A CN101750058 A CN 101750058A CN 200810218291 A CN200810218291 A CN 200810218291A CN 200810218291 A CN200810218291 A CN 200810218291A CN 101750058 A CN101750058 A CN 101750058A
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Abstract
The invention discloses an optical fiber gyroscope which can effectively control the wavelength stability of light source and obviously improve the scale factor stability of the optical fiber gyroscope; the optical fiber gyroscope comprises a light source, a coupler, an MIOC integration optical multi-functional modulator, a wavelength detection element for detecting and calculating the wavelength deviation, a wavelength feedback control circuit and a light wave regulating part; the wavelength detection element transmits data to the light wave regulating part through the light wave regulating part, and the light wave regulating part regulates the light source according to the received data. The technology overcomes the wavelength drifting of the light source, caused by slow change of temperature and time, the drifting of wavelength relevance of the coupler along with the temperature, the wavelength transmission characteristic drifting of the MIOC integration optical multi-functional modulator along with the temperature, so as to effectively solve the problem of the wavelength stability of the light source and improve the scale factor stability of the optical fiber gyroscope system.
Description
Technical field
The present invention relates to optical gyroscope, specifically is a kind of fibre optic gyroscope, belongs to the gyro technical field.
Background technology
Fibre optic gyroscope is a kind of simple in structure, with low cost, gyroscope of being easy to produce in batches.Its development is to be precondition with low loss fiber and small-sized reliable semiconductor light sources, a kind of interferometer that utilizes optical fiber to constitute, belong to optics, silent oscillation gyroscope, it is from having broken away from the category of rotor gyro in essence, and because optical fibre gyro adopts is all solid state design, compare with other gyro, because its tangible advantage will progressively replace traditional mechanical formula gyroscope.
The development of fiber optic gyroscope performance is along with the development of photoelectric technology develops.At present, the application of optical fibre gyro develops to both direction: the one, be applied to the high-precision optical fiber gyro instrument of inertial navigation system, develop fibre optic gyroscope product with low drift, high stability, strong anti-interference ability, and be applied in the engineering practice, objectives for drift drop to 0.001～0.1 °/below the h.The Another application direction of fibre optic gyroscope is that the low cost of 10 °/h, dual-use fibre optic gyroscope product (referring generally to the open loop gyroscope) are worked energetically in the development drift.The emphasis of this direction is to reduce cost, strengthen it to strive power unexpectedly, enlarge its range of application.Fibre optic gyroscope is an indispensable critical component in the inertial navigation system as the device of measured angular speed, angular displacement, is widely used in space vehicle, aircraft, guided missile, naval vessel, panzer, the auto-navigation system.
But there is certain instability in the scaling factor of optical fibre gyro at present, wherein derives from the wave length shift of super luminescence diode SLD light source to a great extent.The constant multiplier error of closed-loop fiber optic gyroscope and the variable quantity of mean wavelength are proportional.So how to solve the drift of SLD optical source wavelength is exactly the great technical barrier of pendulum in face of us.
Summary of the invention
The present invention aims to provide a kind of wavelength stability that can effectively control light source, includes, but are not limited to centre wavelength and mean wavelength, obviously improves the fibre optic gyroscope of stability of the scaling factor of optical fibre gyro.
For achieving the above object, a kind of fibre optic gyroscope of the present invention with centre wavelength monitoring and regulating function, comprise light source, coupling mechanism, the multi-functional modulator of MIOC integrated optics, also comprise the wavelength detecting element, wavelength feedback control circuit, the light wave adjusting parts that are used to detect and calculate wavelength shift, described wavelength detecting element is sent to light wave by the wavelength feedback control circuit with data and regulates parts, and light wave is regulated parts are regulated wideband light source according to the data that receive mean wavelength.
Described wavelength detecting element is connected on an output port of coupling mechanism, to detect the part optical wavelength of SLD light source output.
Be inserted with second coupling mechanism between described coupling mechanism and the multi-functional modulator of MIOC integrated optics, second coupling mechanism is told the optical wavelength after a part is returned from the multi-functional modulator of MIOC integrated optics, the wavelength detecting element is connected on an end of second coupling mechanism, the optical wavelength after returning from the multi-functional modulator of MIOC integrated optics with detection.
Described light wave is regulated parts and is made up of current driving element and temperature control component.
Described wavelength detecting element can adopt multiple active and passive devices to wavelength sensitive such as the photodetector, fiber grating, optical filter, wavelength division multiplexer of wavelength sensitive.
Technical scheme of the present invention has overcome light source because the gradual wave length shift that causes of temperature and time, the wavelength dependence of coupling mechanism is with the drift of temperature, the transmission wavelength characteristics of the multi-functional modulator of MIOC integrated optics is with the drift of temperature, and the comprehensive wavelength dependent characteristics of fiber optic loop, detector photoelectric device, thereby solved the problem of optical source wavelength stability effectively, improved the scale-factor stabilised property of optical fibre gyro system.
Description of drawings
Fig. 1 is the structured flowchart of the specific embodiment of the invention one.
Embodiment
As shown in Figure 1, the fibre optic gyroscope in the present embodiment one comprises wideband light source, the coupling mechanism of SLD, connects wavelength detecting element 1 at an output port of coupling mechanism, and this wavelength detecting element 1 is used for detecting and calculating wavelength shift.Wavelength detecting element 1 is sent to light wave by wavelength feedback control circuit 2 with data and regulates parts 3, and light wave is regulated parts 3 and is connected to the SLD light source, and regulates the SLD light source according to the data that receive.
Embodiments of the invention two, though drawing is not arranged to be indicated, but itself and embodiment one are roughly the same, difference is to be inserted with second coupling mechanism between coupling mechanism and the multi-functional modulator of MIOC integrated optics, second coupling mechanism is told the optical wavelength after a part is returned from the multi-functional modulator of MIOC integrated optics, wavelength detecting element 1 is connected on an end of second coupling mechanism, the optical wavelength after returning from the multi-functional modulator of MIOC integrated optics with detection.
Wherein, wavelength detecting element 1 is the optical element to the optical wavelength sensitivity, this element comprises, still is not limited to wavelength relative photo electric explorer, fiber grating, comprises the various optical filters that wavelength is relevant, multiple active and passive device to wavelength sensitive such as wavelength division multiplexer.Light wave is regulated parts and is made up of current driving element and temperature control component.
When of the variation of system centre wavelength owing to each optical component, this variation may be because temperature, vibrations and gradual etc. causing in time, include, but are not limited to the variation that these reasons cause, when this variation caused wave length shift, the detection optical fiber components and parts that wavelength is relevant promptly can detect the drift of wavelength.This wavelength comprises the parameter that centre wavelength, mean wavelength or other can the descriptive system wavelength, system compares wavelength that detects and the numerical value that writes down before, if deviation is arranged, then revise in real time, comprise correction to the gyro output data, and the SLD light source is regulated, and the wavelength variations that makes it is to compensate the center wavelength variation that causes owing to a variety of causes.Purpose is to make the output of gyro keep constant, reduces significantly because the various external worlds or the uncertainty of inside or intrinsic factor cause error.
Claims (5)
1. fibre optic gyroscope with centre wavelength monitoring and regulating function, comprise light source, coupling mechanism, the multi-functional modulator of MIOC integrated optics, it is characterized in that comprising the wavelength detecting element (1), wavelength feedback control circuit (2), the optical wavelength adjusting parts (3) that are used to detect and calculate wavelength shift, described wavelength detecting element is sent to light wave by wavelength feedback control circuit (2) with data and regulates parts (3), and light wave is regulated parts (3) and regulated light source according to the data that receive.
2. fibre optic gyroscope according to claim 1 is characterized in that, described wavelength detecting element (1) is connected on an output port of coupling mechanism, and the optical wavelength with detection light source output comprises mean wavelength, various correlation parameters such as peak wavelength, general designation optical wavelength.
3. fibre optic gyroscope according to claim 1, it is characterized in that, be inserted with second coupling mechanism between described coupling mechanism and the multi-functional modulator of MIOC integrated optics, second coupling mechanism is told the optical wavelength after a part is returned from the multi-functional modulator of MIOC integrated optics, described wavelength detecting element (1) is connected on an end of second coupling mechanism, the optical wavelength after returning from the multi-functional modulator of MIOC integrated optics with detection.
4. according to each described fibre optic gyroscope in the claim 1 to 3, it is characterized in that described light wave is regulated parts (3) and is made up of current driving element and temperature control component.
5. fibre optic gyroscope according to claim 4 is characterized in that, described wavelength detecting element (1) can adopt multiple active and passive devices to wavelength sensitive such as wavelength relative photo electric explorer, fiber grating, optical filter, wavelength division multiplexer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810218291A CN101750058A (en) | 2008-12-09 | 2008-12-09 | Optical fiber gyroscope with centre wavelength monitoring and regulating function |
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| CN200810218291A CN101750058A (en) | 2008-12-09 | 2008-12-09 | Optical fiber gyroscope with centre wavelength monitoring and regulating function |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607551A (en) * | 2012-03-21 | 2012-07-25 | 浙江大学 | Fiber optic gyroscope capable of eliminating influence of wavelength change to scale factor |
| CN102706362A (en) * | 2012-05-24 | 2012-10-03 | 湖北航天技术研究院总体设计所 | Optical power self-correction method for fiber-optic gyroscope and high-precision fiber-optic gyroscope using same |
| CN104613954A (en) * | 2015-01-27 | 2015-05-13 | 浙江大学 | Single-light source double-peak fiber optic gyro |
| CN107111255A (en) * | 2014-12-29 | 2017-08-29 | Asml控股股份有限公司 | To the feedback control system of Barebone |
| CN107543537A (en) * | 2017-07-10 | 2018-01-05 | 北京控制工程研究所 | A kind of method for improving optic fiber gyroscope graduation factor stability |
| CN112097753A (en) * | 2020-09-14 | 2020-12-18 | 湖南航天机电设备与特种材料研究所 | Method and system for detecting phase change point of optical fiber ring |
| CN112710331A (en) * | 2020-12-21 | 2021-04-27 | 株洲菲斯罗克光电技术有限公司 | Optical fiber gyroscope initialization calibration method and system |
| CN112710332A (en) * | 2020-12-21 | 2021-04-27 | 株洲菲斯罗克光电技术有限公司 | Method and system for calibrating output power of optical fiber gyroscope |
| CN114234955A (en) * | 2022-03-01 | 2022-03-25 | 深圳奥斯诺导航科技有限公司 | Scale factor on-line compensation system and method of fiber-optic gyroscope |
-
2008
- 2008-12-09 CN CN200810218291A patent/CN101750058A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607551B (en) * | 2012-03-21 | 2015-01-28 | 浙江大学 | Fiber optic gyroscope capable of eliminating influence of wavelength change to scale factor |
| CN102607551A (en) * | 2012-03-21 | 2012-07-25 | 浙江大学 | Fiber optic gyroscope capable of eliminating influence of wavelength change to scale factor |
| CN102706362A (en) * | 2012-05-24 | 2012-10-03 | 湖北航天技术研究院总体设计所 | Optical power self-correction method for fiber-optic gyroscope and high-precision fiber-optic gyroscope using same |
| CN102706362B (en) * | 2012-05-24 | 2015-01-21 | 湖北航天技术研究院总体设计所 | Optical power self-correction method for fiber-optic gyroscope and high-precision fiber-optic gyroscope using same |
| JP2018503872A (en) * | 2014-12-29 | 2018-02-08 | エーエスエムエル ホールディング エヌ．ブイ． | Feedback control system for alignment system |
| CN107111255B (en) * | 2014-12-29 | 2018-11-13 | Asml控股股份有限公司 | To the feedback control system of Barebone |
| CN107111255A (en) * | 2014-12-29 | 2017-08-29 | Asml控股股份有限公司 | To the feedback control system of Barebone |
| US10082740B2 (en) | 2014-12-29 | 2018-09-25 | Asml Holding N.V. | Feedback control system of an alignment system |
| CN104613954A (en) * | 2015-01-27 | 2015-05-13 | 浙江大学 | Single-light source double-peak fiber optic gyro |
| CN104613954B (en) * | 2015-01-27 | 2017-04-12 | 浙江大学 | Single-light source double-peak fiber optic gyro |
| CN107543537A (en) * | 2017-07-10 | 2018-01-05 | 北京控制工程研究所 | A kind of method for improving optic fiber gyroscope graduation factor stability |
| CN107543537B (en) * | 2017-07-10 | 2019-12-20 | 北京控制工程研究所 | Method for improving scale factor stability of fiber-optic gyroscope |
| CN112097753A (en) * | 2020-09-14 | 2020-12-18 | 湖南航天机电设备与特种材料研究所 | Method and system for detecting phase change point of optical fiber ring |
| CN112097753B (en) * | 2020-09-14 | 2023-07-07 | 湖南航天机电设备与特种材料研究所 | Method and system for detecting optical fiber ring phase change point |
| CN112710331A (en) * | 2020-12-21 | 2021-04-27 | 株洲菲斯罗克光电技术有限公司 | Optical fiber gyroscope initialization calibration method and system |
| CN112710332A (en) * | 2020-12-21 | 2021-04-27 | 株洲菲斯罗克光电技术有限公司 | Method and system for calibrating output power of optical fiber gyroscope |
| CN114234955A (en) * | 2022-03-01 | 2022-03-25 | 深圳奥斯诺导航科技有限公司 | Scale factor on-line compensation system and method of fiber-optic gyroscope |
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Application publication date: 20100623 |