CN109813350A - A kind of high-speed magnetic floating novel optical fiber positioning system - Google Patents
A kind of high-speed magnetic floating novel optical fiber positioning system Download PDFInfo
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- CN109813350A CN109813350A CN201910033012.7A CN201910033012A CN109813350A CN 109813350 A CN109813350 A CN 109813350A CN 201910033012 A CN201910033012 A CN 201910033012A CN 109813350 A CN109813350 A CN 109813350A
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Abstract
The present invention provides a kind of high-speed magnetic floating novel optical fiber positioning systems, comprising: optical fiber and the grating demodulation device being connected with the optical fiber；Grating is respectively equipped at the different positions of the optical fiber, the grating is used to respond the trigger signal of target object, and generates corresponding light reflection signal；The grating demodulation device is for receiving the light reflection signal, and the position for the grating for reflecting signal according to the generation light determines the position of the target object.The high-speed magnetic floating novel optical fiber positioning system provided through the embodiment of the present invention, can rapidly and accurately determine stop position, and locating speed is fast, precision is high, and use optical fiber transmission mode, and time delay is low.Optical fiber strong antijamming capability, and price is low, it can be with save the cost.
Description
Technical field
The present invention relates to detection and localization technical fields, in particular to a kind of high-speed magnetic floating novel optical fiber positioning system.
Background technique
In the system of high-speed magnetic floating, positioning is a part and parcel, and system must be able to quickly in real time and safe and reliable
Detect geographical location locating for magnetic-levitation train, and be transferred to upper layer train control system and the advanced positions of train marked
It is bright, so that reliably control traction can be carried out to the traveling of train.Its performance directly influences the starting of high-speed maglev train, adds
Speed, speed stabilizing, deceleration, accurate stop；Influence energy consumption, operational safety etc..
Existing inductive line intersected speed-position detection method is to assemble vehicle ON TRAINS by being laid with intersection loop line in orbit
Carry what induction coil was realized.Intersect loop line to work with the AC signal of certain frequency, vehicle-mounted coil is intersected in loop line by induction
Current signal magnetic field generated generates induced voltage, and then position pulse signal is obtained after Shape correction, by counting pulse
Number (i.e. train is by the number of inductive loop of entwining) determines train position.It is missed since the arrangement of inductive line intersected exists
Difference, and the case where there are external interference or test leakages, lead to low measurement accuracy.
Another tooth socket positioning mode is that stator slot is designed as to rectangular aperture slot, using the fixation position width of tooth socket, is led to
It crosses the mode counted to long stator synchronous linear motor stator tooth socket and realizes speed-position detection.To guarantee measurement accuracy, then
It needs to lay a large amount of stator tooth socket, the case where cost is higher, and which equally exists test leakage, causes measurement result wrong
Difference.
Summary of the invention
To solve the above problems, the embodiment of the present invention is designed to provide a kind of high-speed magnetic floating novel optical fiber positioning system
System.
In a first aspect, the embodiment of the invention provides a kind of high-speed magnetic floating novel optical fiber positioning systems, comprising: optical fiber and with
The connected grating demodulation device of the optical fiber；
Grating is respectively equipped at the different positions of the optical fiber, the grating is used to respond the triggering letter of target object
Number, and generate corresponding light reflection signal；
The grating demodulation device reflects signal for receiving the light, and according to the grating for generating the light reflection signal
Position determine the position of the target object.
A kind of high-speed magnetic floating novel optical fiber positioning system provided in an embodiment of the present invention, on the driving trace of target object
The optical fiber for being carved with multiple gratings is laid, target object triggering grating movement and then the spy of the light of optical grating reflection specific wavelength are utilized
Property, optical grating regulating device determines which grating movement in optical fiber, may thereby determine that the position of target object.The high-speed magnetic floating is new
Type optical fibre positioning system can rapidly and accurately determine stop position, and locating speed is fast, precision is high, and use optical fiber transmission side
Formula, time delay are low.Optical fiber strong antijamming capability, and price is low, it can be with save the cost.
In the scheme that the above-mentioned first aspect of the embodiment of the present invention provides, laying is carved with more on the driving trace of target object
The optical fiber of a grating is adjusted using target object triggering grating movement and then the characteristic of the light of optical grating reflection specific wavelength, grating
Device determines which grating movement in optical fiber, may thereby determine that the position of target object.High-speed magnetic floating novel optical fiber positioning
System can rapidly and accurately determine stop position, and locating speed is fast, precision is high, and use optical fiber transmission mode, and time delay is low.Light
Fine strong antijamming capability, and price is low, it can be with save the cost.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 shows the first structure signal of high-speed magnetic floating novel optical fiber positioning system provided by the embodiment of the present invention
Figure；
Fig. 2 shows the second structural representations of high-speed magnetic floating novel optical fiber positioning system provided by the embodiment of the present invention
Figure；
Fig. 3 shows the third structural representation of high-speed magnetic floating novel optical fiber positioning system provided by the embodiment of the present invention
Figure；
Fig. 4 shows the 4th structural representation of high-speed magnetic floating novel optical fiber positioning system provided by the embodiment of the present invention
Figure；
Fig. 5 shows the 5th structural representation of high-speed magnetic floating novel optical fiber positioning system provided by the embodiment of the present invention
Figure.
Specific embodiment
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
A kind of high-speed magnetic floating novel optical fiber positioning system provided in an embodiment of the present invention, for measuring the position of target object
It sets, which is specifically as follows object, such as train, magnetic suspension train etc. along desired guiding trajectory traveling.Referring to Fig. 1 institute
Show, which includes: optical fiber 10 and the grating demodulation device 20 being connected with optical fiber 10.Optical fiber 10
It can be laid along the driving trace of target object, grating demodulation device 20 determines target object by the optical signal that optical fiber 10 returns
Position.
As shown in Figure 1, being respectively equipped with grating at the different positions of optical fiber 10,8 grating a are shown in Fig. 11~a8；
Grating is used to respond the trigger signal of target object, and generates corresponding light reflection signal.Specifically, target object be equipped with can
Equipment to trigger grating movement, target object can be travelled along desired guiding trajectory, when target object passes through grating, the triggering
Equipment can trigger corresponding grating movement, i.e., target object produces trigger signal, and grating responds the trigger signal and can produce
Raw corresponding light reflects signal, and light reflection signal can be got by grating demodulation device 20.
Grating demodulation device 20 is determined for receiving light reflection signal, and according to the position for the grating for generating light reflection signal
The position of target object.Specifically, which light grating demodulation device 20 can be determined that based on the light reflection signal received
Grid generate the light reflect signal, due to the position of grating in a fiber be it is determining, at this time can grating position, and then really
The fixed target object is located at the grating, it can using the position of grating as the position of target object.Grating demodulation device 20
It specifically can be grating demodulation instrument.
The course of work of the high-speed magnetic floating novel optical fiber positioning system is specific as follows: the inspection of the multiple wavelength of transmission in optical fiber 10
Light is surveyed, the light source for issuing detection light can be additionally set, detection light can also be issued by grating demodulation device 20.When no target object
When, when the grating on optical fiber 10 is failure to actuate, grating demodulation device at this time；When there are target object and target object passes through grating
When, grating movement is triggered, the light for the respective wavelength for meeting bragg wavelength matching condition in detection light is anti-at the grating
It is emitted back towards and, i.e., grating generates light reflection signal, and grating demodulation device 20, which demodulates light reflection signal, later can determine that the light is anti-
The wavelength of signal, the i.e. center reflection wavelength of the grating are penetrated, and then determines which grating is acted, so that it is determined that target pair
As the position at place.
A kind of high-speed magnetic floating novel optical fiber positioning system provided in an embodiment of the present invention, on the driving trace of target object
The optical fiber for being carved with multiple gratings is laid, target object triggering grating movement and then the spy of the light of optical grating reflection specific wavelength are utilized
Property, optical grating regulating device determines which grating movement in optical fiber, may thereby determine that the position of target object.The high-speed magnetic floating is new
Type optical fibre positioning system can rapidly and accurately determine stop position, and locating speed is fast, precision is high, and use optical fiber transmission side
Formula, time delay are low.Optical fiber strong antijamming capability, and price is low, it can be with save the cost.
On the basis of the above embodiments, the grating at different location has different center reflection wavelengths.That is a position
Set a corresponding center reflection wavelength, when determining stop position, the optical signal based on the received of grating demodulation device 20
Wavelength can determine stop position.
" center reflection wavelength " in the embodiment of the present invention refers to the wavelength of the wave reflected when grating movement, i.e. grating
The wavelength of the light reflection signal of generation.The center reflection wavelength can specifically be determined by the grating slit width of grating, spacing etc..It should
Grating specifically can be strain grating, or other types grating, it is only necessary to can respond the trigger signal of target object
?.By taking grating is strain grating as an example, triggering equipment can be additionally arranged in target object (such as train), and target can also be used
Original equipment on object, for example strain grating movement is triggered using the magnetic field of magnetic suspension train.
On the basis of the above embodiments, multiple grating groups, grating group are set gradually according to preset interval on optical fiber 10
The grating of different center reflection wavelengths is equipped at inherent different position.It is shown in Figure 2, multiple gratings are set on optical fiber 10
Group, in Fig. 2 by taking four grating groups as an example, the multiple gratings of setting in each grating group, for example first grating group is equipped with 8 in Fig. 2
A grating a1~a8, behind also be provided with 8 grating b respectively in three grating groups1~b8、c1~c8、d1~d8。
When determining stop position, it is first determined which grating movement in grating group determined later for the position of grating group,
And then combining the position or sequence of the position and grating of grating group in the grating group is that can determine the absolute position of the grating,
It may thereby determine that the position of target object.Illustrate by taking high-speed magnetic floating novel optical fiber positioning system shown in Fig. 2 as an example, if different
Grating group is in addition to position difference, and the center reflection wavelength of grating therein is successively identical, i.e. grating a1、b1、c1、d1Center it is anti-
Ejected wave length is identical, is λ1, grating a2、b2、c2、d2Center reflection wavelength it is identical, be λ2... if target object is in Fig. 2 along light
Fibre 10 from left to right moves, then detects that wavelength is λ when 20 first time of grating demodulation device1Reflected light when, can determine light
Grid a1Movement；Detect that wavelength is λ when second of grating demodulation device 201Reflected light when, can determine grating b1Movement, from
And it can determine the position where target object.
On the basis of the above embodiments, shown in Figure 3, the high-speed magnetic floating novel optical fiber positioning system further include: with
The connected optical time domain reflecting device 30 of optical fiber 10.Optical time domain reflecting device 30 is used to reflect signal according to light and determines that generating light reflects
The grating group position of signal；Grating demodulation device 20 is used to according to reflected light signal determine position of the grating in grating group, it
The position of target object is determined according to the position Synthesis of grating group position and grating in grating group afterwards.
In the embodiment of the present invention, optical time domain reflecting device 30 is based on optical time domain reflection (Optical Time-Domain
Reflectometer, OTDR) principle can substantially determine occur light reflection position, that is, the position of the grating acted；Optical time domain
Reflection unit 30 specifically can be optical time domain reflectometer.Since the positioning accuracy of optical time domain reflecting device 30 is lower, the present invention is real
It applies in example and grating is divided into multiple grating groups, determine the grating acted in which grating using optical time domain reflecting device 30
Group, it can determine the position for generating the grating group of light reflection signal；It is accurately the light using grating demodulation device 20 later
Which grating movement in grid group, and then can accurately determine the position of the grating acted.By grating demodulation device and
Optical time domain reflecting device is positioned, and to can use the detection light comprising a small amount of wavelength can be realized precise positioning.It is with Fig. 3
Example, if different grating groups are in addition to position difference, the center reflection wavelength of grating therein is successively identical, i.e. each light of optical fiber 10
The center reflection wavelength of i-th of grating is identical as the center reflection wavelength of i-th of grating in other grating groups in grid group, such as
Grating a1、b1、c1、d1Center reflection wavelength it is identical；If in each grating group including 8 kinds of gratings, 8 kinds of gratings are corresponded in 8
Oculo cardiac reflex wavelength X1~λ8, only need in detection light at this time comprising 8 kinds of center reflection wavelengths.
Include 4 grating groups in optical fiber 10 specifically, in Fig. 3, include 8 gratings in each grating group, and four gratings
For group in addition to the position on optical fiber 10 is different, four grating groups are identical；Meanwhile in order to guarantee optical time domain reflecting device 30
It can be accurately positioned, the preset interval between adjacent gratings group is not less than the measurement accuracy of optical time domain reflecting device 30, i.e. grating
a1With b1The distance between be not less than optical time domain reflecting device 30 measurement accuracy.When needing to position, transmission includes 8 in optical fiber
Kind wavelength X1~λ8Detection light, when grating is failure to actuate, detection light can be by optical fiber without reflecting, grating solution at this time
Device 20 and optical time domain reflecting device 30 is adjusted not to receive reflected light.When the movement of some grating, for example train passes through grating
c5, i.e. grating c5Movement, grating c5Reflection wavelength is λ5Light reflect signal.At this point, optical time domain reflecting device 30 can determine instead
The position of light reflection signal is penetrated, and determines which grating group is the general location be located at, can determine that the grating group is the at this time
Three grating groups；Simultaneously as grating demodulation device 20 get be wavelength be λ5Light reflect signal, may thereby determine that
It is the light reflection signal that the 5th grating generates, and then determination is that the 5th grating is acted in third grating group,
That is grating c5Movement.If optical time domain reflecting device 30 is unable to the position of accurate judgement grating group, optical time domain reflection can also be based on
The measurement accuracy of device 30 determines a range, is determined in the range based on the determined grating serial number of grating demodulation device 20
The exact position of grating.
In the embodiment of the present invention, in order to improve positioning accuracy and positioning real-time, need to carve on optical fiber than comparatively dense
Grating, for example carve a grating every 10cm or carve a grating every 1cm.To need to detect the distance of 1km length (i.e.
Fiber lengths are 1km), optical fiber every 10cm carve a grating for, then need to carve 10,000 gratings on light, if only utilizing
Grating demodulation device 20 is positioned, embodiment as shown in Figure 1, then needs to identify 10,000 waves with the grating demodulation device 20
Long (the corresponding wavelength of each grating), requires grating demodulation device 20 excessively high.And use grating demodulation device+optical time domain anti-
The mode of injection device is positioned, embodiment as shown in Figure 3, and 8 gratings are arranged in each grating group, needs to be arranged 1250 altogether
Grating group, 8 gratings in each grating group are identical；Detection light is only needed comprising 8 wavelength, grating demodulation device at this time
20 needs can identify 8 wavelength, while guaranteeing positioning accuracy and positioning real-time, can also reduce cost.
On the basis of the above embodiments, shown in Figure 4, the high-speed magnetic floating novel optical fiber positioning system include it is a plurality of simultaneously
The optical fiber 10 of row setting, every optical fiber 10 are equipped with multiple grating groups, and the position of grating group and other light in every optical fiber 10
The position of the grating group of fibre 10 is not overlapped.
Every optical fiber 10 accesses different grating demodulation device 20 and optical time domain reflecting device 30；Or every optical fiber 10 connects
Enter the different optical channels of grating demodulation device 20 and optical time domain reflecting device 30.
Even if detection light can also decay when passing through grating since grating is failure to actuate, to limit optical fiber used
10 length.In the embodiment of the present invention, positioned respectively by a plurality of parallel arrangement of optical fiber 10, i.e., by the grating of positioning
It is distributed on different optical fiber, if ignoring decaying when detection light is transmitted in a fiber, high-speed magnetic floating novel optical fiber positioning system
The detecting distance of system can be increased with multiple.For example an optical fiber can detecte the distance of 1km long, then 10 optical fiber can detecte
The distance of 10km long.Specifically, detection device (i.e. grating demodulation device 20 and an optical time domain reflection can be set in an optical fiber
Device 30), the detection device of multichannel, one optical fiber of an Air conduct measurement can also be used.Since optical fiber cost is very low, using more
Influence very little of the optical fiber (such as optical cable) to cost is positioned over long distances so as to be realized using additional small cost.
On the basis of the above embodiments, when there are a plurality of optical fiber, in every optical fiber 10 i-th grating of grating group with
I-th of grating center reflection wavelength having the same of the grating group of other optical fiber 10.Since every optical fiber 10 is required to provide
Detection light can be used 1 beam detection light, realized in the way of gating optical fiber when the set-up mode of every optical fiber 10 is identical
Every optical fiber can be with normal transmission detection light.The specification of unified optical fiber also facilitates subsequent positioning, avoids location algorithm excessively multiple
It is miscellaneous or error-prone.
It should be noted that for the convenience of description, being with the grating quantity in each grating group in the embodiment of the present invention
Explanation (for example Fig. 2-Fig. 4 is so that a grating group includes 8 gratings as an example), can also adopt according to the actual situation for identical
4,5,6,4,5,6 ... etc. are followed successively by with the grating quantity in other distribution modes, such as grating group, it is only necessary to which guarantee can be true
Determine stop position.
On the basis of the above embodiments, shown in Figure 5 when being positioned only with grating demodulation device 20, it should
Device also may include a plurality of parallel arrangement of optical fiber 10, and in every optical fiber 10 position of grating and other optical fiber 10 grating
Position be not overlapped.
Every optical fiber 10 accesses different grating demodulation devices 20；Or every optical fiber 10 accesses grating demodulation device 20
Different optical channels.
In the embodiment of the present invention, in the case where not using optical time domain reflecting device 30, a plurality of optical fiber can also be used and reduce
Requirement to grating demodulation device 20.For example, if desired grating demodulation device 20 can detecte 10,000 kinds of wavelength, if setting 10
Optical fiber only needs grating demodulation device 20 to can detecte 1,000 kinds of wavelength at this time.
On the basis of the above embodiments, which can also include parallel with optical fiber 10
The inductive line intersected of setting；Inductive line intersected is used to primarily determine the relative position of target object.
When grating demodulation device 20 receives light reflection signal, according to the determining target object of grating demodulation device 20
Position is modified relative position, using position identified after amendment as the position of finally determining target object；
When grating demodulation device 20 does not receive light reflection signal, using relative position as finally determining target object
Position.
In the embodiment of the present invention, the position of target object is primarily determined using traditional inductive line intersected, and utilize light
Exact position determined by grid demodulating equipment 20 is modified the position that this is primarily determined, to guarantee inductive line intersected institute really
The accuracy set is positioned, inductive line intersected test leakage is avoided, also can avoid cumulative errors.Meanwhile in setting inductive line intersected
Afterwards, it does not need that intensive grating is arranged in a fiber, leads to too small amount of grating and can be realized and relatively accurately position, reduce simultaneously
Detection light passes through the quantity of grating, reduces loss, avoids that light loss is excessive to cause detection device that cannot accurately adopt because detecting
Collect reflected light.
On the basis of the above embodiments, the high-speed magnetic floating novel optical fiber positioning system the position for determining target object it
Afterwards, the alternate position spike according to target object in different moments determines the movement speed of target object, to realize quickly positioning.Together
When, due to the ratio comparatively dense that grating can be set, motion state of the target object between two adjacent gratings be can be equivalent to
Uniform motion, speed determined by the positioning system are more accurate.
A kind of high-speed magnetic floating novel optical fiber positioning system provided in an embodiment of the present invention, on the driving trace of target object
The optical fiber for being carved with multiple gratings is laid, target object triggering grating movement and then the spy of the light of optical grating reflection specific wavelength are utilized
Property, optical grating regulating device determines which grating movement in optical fiber, may thereby determine that the position of target object.The high-speed magnetic floating is new
Type optical fibre positioning system can rapidly and accurately determine stop position, and locating speed is fast, precision is high, and use optical fiber transmission side
Formula, time delay are low.Optical fiber strong antijamming capability, and price is low, it can be with save the cost.Using grating demodulation device+optical time domain reflection
The mode of device is positioned, and the requirement to grating demodulation device can be greatly reduced, and is guaranteeing that positioning accuracy and positioning are real
While when property, cost can also be reduced；It can use additional small cost using a plurality of optical fiber and realize positioning over long distances.Using
Optical fiber+inductive line intersected mode is positioned, it is possible to reduce the quantity of grating used is reduced costs, and be can reduce
The loss that detection light is transmitted in a fiber further improves the accuracy of positioning.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of high-speed magnetic floating novel optical fiber positioning system characterized by comprising optical fiber and the grating being connected with the optical fiber
Demodulating equipment；
Grating is respectively equipped at the different positions of the optical fiber, the grating is used to respond the trigger signal of target object,
And generate corresponding light reflection signal；
The grating demodulation device is for receiving the light reflection signal, and the position for reflecting the grating of signal according to the light is generated
Set the position for determining the target object.
2. positioning system according to claim 1, which is characterized in that the grating at different location has different centers anti-
Ejected wave is long.
3. positioning system according to claim 1, which is characterized in that set gradually on the optical fiber according to preset interval
Multiple grating groups, the interior grating that different center reflection wavelengths are equipped at different positions of the grating group.
4. positioning system according to claim 3, which is characterized in that the high-speed magnetic floating novel optical fiber positioning system is also wrapped
It includes: the optical time domain reflecting device being connected with the optical fiber；
The optical time domain reflecting device, which is used to reflect signal according to the light, determines the grating group position for generating the light reflection signal
It sets；The grating demodulation device is used to determine position of the grating in grating group according to the reflected light signal, later according to really
Position of the fixed grating group position and grating in grating group determines the position of the target object.
5. positioning system according to claim 4, which is characterized in that the preset interval between adjacent gratings group is not small
In the measurement accuracy of the optical time domain reflecting device.
6. positioning system according to claim 4, which is characterized in that including a plurality of parallel arrangement of optical fiber, every optical fiber
Multiple grating groups are equipped with, and the position of grating group and the position of the grating group of other optical fiber be not be overlapped in every optical fiber；
Every intelligent acess different grating demodulation device and optical time domain reflecting device；Or every intelligent acess grating demodulation dress
Set the different optical channels with optical time domain reflecting device.
7. positioning system according to claim 4, which is characterized in that be equipped with the grating of identical quantity, and institute in grating group
It is identical as the center reflection wavelength of i-th of grating in other grating groups to state the center reflection wavelength of i-th of grating in grating group.
8. positioning system according to claim 1, which is characterized in that including a plurality of parallel arrangement of optical fiber, and every light
The position of the grating of the position and other optical fiber of grating is not be overlapped in fibre；
The different grating demodulation device of every intelligent acess；Or the different light of every intelligent acess grating demodulation device are logical
Road.
9. -8 any positioning system according to claim 1, which is characterized in that further include and optical fiber is parallel arrangement of intersects
Inductive loop；
The inductive line intersected is used to primarily determine the relative position of the target object；
When the grating demodulation device receives light reflection signal, according to the determining target pair of the grating demodulation device
The position of elephant is modified the relative position, using position identified after amendment as the target object finally determined
Position；
When the grating demodulation device does not receive light reflection signal, using the relative position as the mesh finally determined
Mark the position of object.
10. -8 any positioning system according to claim 1, which is characterized in that described device is also used to:
Alternate position spike according to the target object in different moments determines the movement speed of the target object.
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Cited By (4)
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| CN110749952A (en) * | 2019-10-31 | 2020-02-04 | 武汉理工大学 | Method for preparing fiber grating array optical cable for positioning and measuring speed of high-speed magnetic suspension train |
| CN110758474A (en) * | 2019-10-28 | 2020-02-07 | 武汉理工大学 | Array grating sensing and cross induction loop combined high-speed magnetic suspension train positioning and speed measuring method |
| CN114987579A (en) * | 2022-05-26 | 2022-09-02 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle and speed measuring and positioning system thereof |
| WO2023165124A1 (en) * | 2022-03-04 | 2023-09-07 | 中车青岛四方机车车辆股份有限公司 | Positioning system and method for maglev train |
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| CN110758474A (en) * | 2019-10-28 | 2020-02-07 | 武汉理工大学 | Array grating sensing and cross induction loop combined high-speed magnetic suspension train positioning and speed measuring method |
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| CN114987579A (en) * | 2022-05-26 | 2022-09-02 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle and speed measuring and positioning system thereof |
| CN114987579B (en) * | 2022-05-26 | 2024-07-16 | 中车青岛四方机车车辆股份有限公司 | Railway vehicle and speed measuring and positioning system thereof |
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