CN108036806A - A kind of angular displacement based on multi-core optical fiber and angular velocity measurement system - Google Patents
A kind of angular displacement based on multi-core optical fiber and angular velocity measurement system Download PDFInfo
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- CN108036806A CN108036806A CN201711464490.0A CN201711464490A CN108036806A CN 108036806 A CN108036806 A CN 108036806A CN 201711464490 A CN201711464490 A CN 201711464490A CN 108036806 A CN108036806 A CN 108036806A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 43
- 238000005259 measurement Methods 0.000 title claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 8
- 240000008042 Zea mays Species 0.000 claims abstract description 6
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 6
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 6
- 235000005822 corn Nutrition 0.000 claims abstract description 6
- 229910052711 selenium Inorganic materials 0.000 claims abstract description 6
- 239000011669 selenium Substances 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000008054 signal transmission Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of angular displacement based on multi-core optical fiber and angular velocity measurement system, including light source, multi-core optical fiber, to be measured turn face and demodulated equipment；The light source, which by multi-core optical fiber is fanned out to connector and is bonded to the central core of multi-core optical fiber, is used as output channel, and the fibre core of surrounding is then used as receiving channel, for collecting follow-up reflected light；The face to be measured that turns is cyclic structure, and cyclic structure is divided into multiple sectors, and compartment of terrain is handled in each sector surfaces, the high reflectance processing done for laser band with high-selenium corn successively；Output end face and the face perfect parallelism to be measured that turns are placed at the same time, the distance on two sides should be as far as possible small；The demodulated equipment is used for the output light for detecting each receiving channel of multi-core optical fiber, and handle analysis, the angular displacement and angular velocity measurement system based on multi-core optical fiber, due to can only complete the reception and transmission of signal by single multi-core optical fiber, it is low with cost, electromagnetism interference, it is simple in structure, the advantages that high sensitivity.
Description
Technical field
The present invention relates to technical field of optical fiber sensing, is specially a kind of angular displacement and angular velocity measurement based on multi-core optical fiber
System.
Background technology
In recent years, measurement in relation to angular speed and angular displacement in the field of daily life and industrial production etc. increasingly by
To concern, unmanned aerial vehicle (UAV) control, camera lens stabilization and accurate production etc..By the measurement to this parameter, rotation can be analyzed
Transfer from one department to another corresponding situation of the shaft to various excitations of uniting.The method that common measurement method uses contact, is adhered to using mass body
The construction of modern elastic substrates is won in injection, angular speed is measured with interaction by mass body and substrate.But contact
There is very big application limitation in measurement, have a certain impact to measured object.Non-contact measurement based on laser, in measurement accuracy
And there is very big advantage on measurement method.
Multi-core optical fiber is a kind of Novel transmission optical fiber, is used to meet since the network user is skyrocketed through the super large band that brings
Wide demand.Traditional fiber is single structure, forms monochromatic light waveguide around single fibre core by covering, multi-core optical fiber is then interior containing more
More fiber waveguides of root fibre core but public covering, cross section is as schemed.If the multi-core optical fiber of five light waves coupling, function is that is, more
The combination of root single-core fiber, can greatly improve level of integrated system, reduce cost of manufacture and difficulty.
Existing data transfer needs more multi-core optical fibers to complete the transmission of big data, and not only cost is big for it, but also
Structure is also more complicated, and remolding sensitivity is relatively low；The transmission of data is not easy to, using with limitation.
The content of the invention
Invention provides a kind of angular displacement based on multi-core optical fiber and angular velocity measurement system, solves background technology
The difficult problem of middle proposition.
In order to achieve the above object, the present invention is achieved by the following technical programs：A kind of angle position based on multi-core optical fiber
Move with angular velocity measurement system, including light source, multi-core optical fiber, to be measured turn face and demodulated equipment；The light source passes through multi-core optical fiber
It is fanned out to connector and is bonded to the central core of multi-core optical fiber as output channel, the fibre core of surrounding is then used as receiving channel, for collecting
Follow-up reflected light；The face to be measured that turns is cyclic structure, and cyclic structure is divided into multiple sectors, and compartment of terrain is in each fan successively
Area surface, the high reflectance processing done for laser band are handled with high-selenium corn；At the same time by output end face with to be measured to turn face tight
Lattice are placed in parallel, and the distance on two sides should be as far as possible small；The demodulated equipment is used for the output light for detecting each receiving channel of multi-core optical fiber,
And handle analysis, you can the rotating speed to be measured for turning face is detected accordingly.
As present invention further optimization technical solution, the light source is single-frequency laser.
As present invention further optimization technical solution, the demodulated equipment is popped one's head in by PD, Acquisition Circuit and processor
Form, PD probes receive the reflection that sector connector is drawn and receive light, convert optical signal into Electric signal processing；Acquired circuit is put
Greatly, after filtering and modulus AD conversion, it is transmitted to processor and is calculated.
Beneficial effect
The present invention provides a kind of angular displacement based on multi-core optical fiber and angular velocity measurement system.Possess following
Beneficial effect：
The angular displacement and angular velocity measurement system based on multi-core optical fiber, are realized to measured object rotational angle displacement and angular speed
Non-contact measurement system；This method can realize the angular displacement resolution ratio of μm magnitude, and resolution ratio turns the half of face with to be measured
The increase in footpath.Due to can only complete the reception and transmission of signal by single multi-core optical fiber, low with cost, anti-electromagnetism is done
Disturb, it is simple in structure, the advantages that high sensitivity；It is highly practical, use easy to spread.
Brief description of the drawings
Fig. 1 is the system structure diagram of the present invention；
Fig. 2 is the multi-core optical fiber sectional view of the present invention；
Fig. 3 is the high reflection region reception amount schematic diagram of the present invention；
Fig. 4 is the overlooking region reception amount schematic diagram of the present invention；
Fig. 5 is the high-selenium corn region reception amount schematic diagram of the present invention；
In figure：1- light sources, 2- multi-core optical fibers, 3- be to be measured to turn face, 4- demodulated equipments, 5- multi-core optical fibers are fanned out to connector, 6-PD
Probe, 7- Acquisition Circuits, 8- processors.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
- 5 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of angular displacement based on multi-core optical fiber is surveyed with angular speed
Amount system, including light source 1, multi-core optical fiber 2, to be measured turn face 3 and demodulated equipment 4；The light source 1 is fanned out to connector by multi-core optical fiber
5 are bonded to the central core of multi-core optical fiber 2 as output channel, and the fibre core of surrounding is then used as receiving channel, follow-up for collecting
Reflected light, optical fiber due to being that system realizes the core measured on the detection of luminous power size, should be fixed, avoided not
Necessary bending loss；The light source 1 is single-frequency laser；The face 3 to be measured that turns is cyclic structure, and cyclic structure is divided into
Multiple sectors, in each sector surfaces, the high reflectance processing done for laser band is handled with high-selenium corn for compartment of terrain successively；Together
When output end face and the face perfect parallelism to be measured of turning are placed, the distance on two sides should be as far as possible small, when tested surface rotates, due to it is high instead
End face is spaced inswept successively with absorbing end face, therefore can partly reflex to optical fiber with certain rule by the output light of multi-core optical fiber
The fibre core of end face surrounding.Wherein the width of Gao Fan areas and uptake zone should be greater than the ultimate range between fiber core, could be accurate
Detection；The demodulated equipment 4 is used for the output light for detecting 2 each receiving channel of multi-core optical fiber, and handles analysis, you can be measured
The rotating speed for turning face 3 is detected accordingly, and the demodulated equipment 4 is made of PD probes 6, Acquisition Circuit 7 with processor 8, and PD is visited
The reflection that first 6 reception sector connector is drawn receives light, converts optical signal into Electric signal processing；Acquired circuit 7 amplifies, filters
After ripple and modulus AD conversion, it is transmitted to processor 8 and is calculated..
For the fibre core quantity of different resolution requirement and multi-core optical fiber, the mode of demodulation process can be different, by figure
Exemplified by five core fibres in 1, when inswept region is entirely high anti-region, the reflection light quantity that four receiving terminals receive is maximum
Value, and when inswept region is entirely high-selenium corn region, then it is opposite for minimum.The pilot process of four receiving terminals answers various satisfactions
Certain sine and cosine relation, can pass through calibration, be fitted specific function curve.The system also can only detect the maximum of reception amount
Minimum pulse, reduces the complexity of system, while resolution ratio can be reduced to 100 μm of magnitudes, is in view of the face to be measured that turns at this time
Circle, fiber end face is different from the relative position with side, and the resolution ratio for detecting angular speed also can be different, and resolution ax θ=
360 ° × Δ d/2 π R, wherein Δ d is the width of each Gao Fanqu, while Gao Fanqu and circle center distance R values are bigger, and resolution ratio is higher.
In order to avoid error caused by vibrations, there should be specific mechanical framework strictly to fix fiber end face with tested surface.
At the same time in order to avoid the interference of ambient light, the detection of reflected light size is influenced, should be answered near fiber end face and tested surface
Carry out necessary every light processing.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed, or further include as this process, method, article or equipment
Intrinsic key element.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of changes, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of angular displacement based on multi-core optical fiber and angular velocity measurement system, it is characterised in that：Including light source (1), multi-core optical
Fine (2), to be measured turn face (3) and demodulated equipment (4)；The light source (1) is fanned out to connector (5) by multi-core optical fiber and is bonded to multi-core optical fiber
(2) central core is as output channel, and the fibre core of surrounding is then used as receiving channel, for collecting follow-up reflected light；It is described
The face (3) to be measured that turns is cyclic structure, and cyclic structure is divided into multiple sectors, and compartment of terrain is directed in each sector surfaces successively
High reflectance processing and the high-selenium corn of laser band are handled；Output end face and the face perfect parallelism to be measured that turns are placed at the same time, two
The distance in face should be as far as possible small；The demodulated equipment (4) is used for the output light for detecting multi-core optical fiber (2) each receiving channel, and handles
Analysis, you can detected accordingly to the rotating speed to be measured for turning face (3).
2. a kind of angular displacement based on multi-core optical fiber according to claim 1 and angular velocity measurement system, it is characterised in that：
The light source (1) is single-frequency laser.
3. a kind of angular displacement based on multi-core optical fiber according to claim 1 and angular velocity measurement system, it is characterised in that：
The demodulated equipment (4) is popped one's head in (6) by PD, Acquisition Circuit (7) is formed with processor (8), and PD probes (6) receive sector connector and draw
The reflection gone out receives light, converts optical signal into Electric signal processing；Acquired circuit (7) amplification, filtering and modulus AD conversion
Afterwards, processor (8) is transmitted to be calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464490.0A CN108036806A (en) | 2017-12-28 | 2017-12-28 | A kind of angular displacement based on multi-core optical fiber and angular velocity measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464490.0A CN108036806A (en) | 2017-12-28 | 2017-12-28 | A kind of angular displacement based on multi-core optical fiber and angular velocity measurement system |
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| CN108036806A true CN108036806A (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711464490.0A Pending CN108036806A (en) | 2017-12-28 | 2017-12-28 | A kind of angular displacement based on multi-core optical fiber and angular velocity measurement system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926589A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Optical fiber vibration sensor static calibration device |
| FR3123432A1 (en) * | 2021-05-31 | 2022-12-02 | Safran | Set for measuring the temporal characterization of vibratory and/or rotating phenomena and system for measuring such a set |
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