CN110081919A - Landmark locations acquisition methods and device - Google Patents
Landmark locations acquisition methods and device Download PDFInfo
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- CN110081919A CN110081919A CN201810074817.1A CN201810074817A CN110081919A CN 110081919 A CN110081919 A CN 110081919A CN 201810074817 A CN201810074817 A CN 201810074817A CN 110081919 A CN110081919 A CN 110081919A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000003287 optical effect Effects 0.000 claims abstract description 77
- 239000000835 fiber Substances 0.000 claims abstract description 68
- 239000013307 optical fiber Substances 0.000 claims abstract description 63
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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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
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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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
- G01D5/268—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 using optical fibres
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Abstract
The present invention relates to a kind of landmark locations acquisition methods, for obtaining the landmark locations of Fibre Optical Sensor point, if including the following steps: the endpoint terrestrial reference for obtaining the main section of composition optical fiber；The endpoint terrestrial reference of line segment where obtaining Fibre Optical Sensor point；The terrestrial reference of the Fibre Optical Sensor point is obtained according to the endpoint terrestrial reference of line segment where the Fibre Optical Sensor point.The present invention also provides a kind of landmark locations acquisition device.Landmark locations acquisition methods of the invention and device, the method for obtaining the landmark locations of Fibre Optical Sensor point by manual measurement completely instead of tradition, the difficulty that the cost and Fibre Optical Sensor point terrestrial reference for greatly reducing fiber deployment obtain.
Description
Technical field
The present invention relates to landmark locations acquiring technology field more particularly to a kind of landmark locations acquisition methods and a kind of
Cursor position acquisition device.
Background technique
Optical fiber sensing technology is using based on the certain optical characteristics of fiber medium, and acquisition is subjected to environment temperature when fiber medium
When degree and stress variation, caused temperature and the variation of stress meter amount.Compared with other method for sensing, Fibre Optical Sensor has transmission
The unique advantages such as, sensing point scale more and completely passive detection sensings wider apart from longer, measurement geographic range.For example,
Distributing optical fiber sensing (DTS) system of standard can support 20000 meters of transmission range, be equivalent to along optical line by can be with
Support up to 20000 sensing points.The sensing point and its large-scale sensing data of such multi-quantity can be corresponded to smoothly very much
A sensing mapping out, wherein optical line on geographical location by that can carry out visualization display, and each sensing point
It can successively be shown along optical fiber route.
In this process, a key and challenging problem are how to will be indicated as each sensing points of distance
It is converted into the actual geographic coordinate position indicated by two dimension or three-dimensional coordinate.Geographical coordinate is that (three-dimensional is also wrapped with latitude, longitude
Include height above sea level) indicate the terrestrial reference in earth coordinates, hereinafter referred to as " terrestrial reference ".It is shown on terrestrial reference map or generalized information system
The process of sensing points P (i), first task are first to find the landmark locations of P (i).
Conventional method usually requires a field technician, after system is installed, need to allow each Fibre Optical Sensor point
It is subjected to temperature or strain variation, sensing host is allowed to calculate the fiber distance of the point.And along optical fiber route hand-held
Terrestrial reference positioning device record the map terrestrial reference of each sensing point.Then map terrestrial reference and fiber distance are corresponded to each other and defeated
Enter database.To establish configuration relation required for map denotation.
However, the method for above-mentioned manual testing's sensing point is a very time-consuming process, it is also easy to malfunction.And
In the actual environment, the optical fiber where sensing point often loses label, therefore, prevent sensing point is from accurately being identified.
Thus, need it is a kind of reduction cost of labor, reduce landmark locations obtain difficulty landmark locations acquisition methods and
Device.
Summary of the invention
Based on this, it is necessary to which artificial telephone expenses are more when obtaining for current progress Fibre Optical Sensor point and sensing point is easy to lose
Mistake causes to be not easy the problem of taking landmark locations, provides a kind of ground for reducing cost of labor, reducing landmark locations acquisition difficulty
Cursor position acquisition methods and device.
Purpose according to the present invention provides a kind of landmark locations acquisition methods, for obtaining the ground mark of Fibre Optical Sensor point
It sets, this method comprises the following steps:
If obtaining the endpoint terrestrial reference of the main section of composition optical fiber；
Line segment where obtaining Fibre Optical Sensor point；
The terrestrial reference of the Fibre Optical Sensor point is obtained according to the endpoint terrestrial reference of line segment where the Fibre Optical Sensor point.
If the step of endpoint terrestrial reference of the main section for obtaining composition optical fiber in one of the embodiments, to obtain
The step of optical fiber inflection point terrestrial reference.
If the step of endpoint terrestrial reference of the main section for obtaining composition optical fiber in one of the embodiments, to obtain
The step of several homogeneous section endpoint terrestrial references of the optical fiber.
The space point of sensor-based system where the length of the homogeneous section is less than the optical fiber in one of the embodiments,
Resolution.
The step of endpoint terrestrial reference for obtaining several optical fiber line segments in one of the embodiments, to obtain the light
The coordinate of map where fine sensing point.
Purpose according to the present invention also provides a kind of landmark locations acquisition device, for obtaining the terrestrial reference of Fibre Optical Sensor point
Position, the device include:
First obtains module, if the endpoint terrestrial reference of the main section for obtaining composition optical fiber；
Second obtains module, for line segment where obtaining Fibre Optical Sensor point；
Third obtains module, for obtaining the Fibre Optical Sensor according to the endpoint terrestrial reference of line segment where the Fibre Optical Sensor point
The terrestrial reference of point.
The first acquisition module further comprises in one of the embodiments: first acquisition unit, for obtaining
State optical fiber inflection point terrestrial reference.
The first acquisition module further comprises in one of the embodiments: second acquisition unit, for obtaining
State several homogeneous section endpoint terrestrial references of optical fiber.
The space point of sensor-based system where the length of the homogeneous section is less than the optical fiber in one of the embodiments,
Resolution.
The first acquisition module further comprises in one of the embodiments: third acquiring unit, for obtaining
The coordinate of map where stating Fibre Optical Sensor point.
The beneficial effect comprise that landmark locations acquisition methods of the invention and device, form light by obtaining
If the endpoint terrestrial reference of fine main section, by line segment where judging Fibre Optical Sensor point, then according to where the Fibre Optical Sensor point
The endpoint terrestrial reference of line segment obtains the terrestrial reference of the Fibre Optical Sensor point.Landmark locations acquisition methods of the invention and device, instead of
The method that tradition obtains the landmark locations of Fibre Optical Sensor point by manual measurement completely, greatly reduce the cost of fiber deployment with
The difficulty that Fibre Optical Sensor point terrestrial reference obtains.
Detailed description of the invention
Fig. 1 is the landmark locations acquisition methods flow chart of one embodiment of the invention；
Fig. 2 is the diagram that the present invention calculates sensing point terrestrial reference by the terrestrial reference of consecutive points；
Fig. 3 is the landmark locations acquisition device schematic diagram of one embodiment of the invention.
Specific embodiment
As described above, conventional method usually requires a field technician, after system is installed, each light need to be allowed
Fine sensing point is subjected to temperature or strain variation, and sensing host is allowed to calculate the fiber distance of the point.And along optical fiber route
The map terrestrial reference of each sensing point is recorded with the terrestrial reference positioning device of hand-held.Then map terrestrial reference and fiber distance is mutual
Corresponding and input database.To establish configuration relation required for map denotation.And landmark locations acquisition methods of the invention
And device, by obtaining the position of the predetermined point on optical fiber, instead of the terrestrial reference for manually directly acquiring Fibre Optical Sensor point of script
Position is respectively provided with fiber position node on general optical fiber, saves artificial the step of finding sensing point, is also prevented from because of sensing point
Position record disappears the problem of causing sensing point that can not find, and reduces the difficulty of sensing point landmark locations acquisition.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to of the invention real
The specific embodiment for applying the temperature acquisition system of example is illustrated.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
The present invention is illustrated in further detail below in conjunction with attached drawing 1-2.
It is the landmark locations acquisition methods flow chart of one embodiment of the invention shown in Fig. 1.
Shown in Fig. 2, the diagram of sensing point terrestrial reference is calculated by the terrestrial reference of consecutive points for the present invention.
It is the landmark locations acquisition device schematic diagram of one embodiment of the invention shown in Fig. 3.
It is a landmark locations acquisition methods 100 of the invention, for obtaining the landmark locations of Fibre Optical Sensor point with reference to Fig. 1.
The present invention relates to optical fiber sensing system, including but not limited to distributed temperature sensing (DTS), distributed strain sensings
(DSS), distributed acoustics sensor (DAS), distribution type fiber-optic Bragg grating sensing.It, should in a distributed manner for temperature sensor
Method 100 includes the following steps:
Step S120: if obtaining the endpoint terrestrial reference of the main section of composition optical fiber.
If optical fiber is divided into main section, the terrestrial reference of the endpoint of these line segments is then obtained.
Handheld positioning device can be used along optical fiber route record position information by field technician, thus into one
Step obtains the endpoint landmark information of optical fiber line segment.The method of the present invention step, technical staff need to only use the preparatory of positioning device
Automatic setting control function periodically records terrestrial reference with uniform distance interval, or only records the inflection point terrestrial reference of optical line line.Step
Optical fiber line segment refers to for optical fiber being divided into several straightways close to straight line in rapid S120, can specifically include following methods
If optical fiber is divided into main section, the available optical fiber inflection point terrestrial reference, or optical fiber is divided into several equidistant line segments.
When optical fiber laying structure is simple, for example, have the straightway region of large area, inflection point it is less when, can choose and directly obtain
The inflection point terrestrial reference for taking optical fiber, can greatly reduce labor workload.At this point, entire optical line is by being considered as by optical fiber starting point
What many line segments between terminal formed.The points to be collected by optical line by practical topology determine.If route is straight
Line then only needs the beginning and end two o'clock of collection path.Also, in order to further increase efficiency, the present invention can be by intelligence
APP execution above-mentioned steps can be used on mobile phone.
In other optical fiber laying structures, it can choose with uniform distance interval, periodically record optical fiber terrestrial reference.Once
Technical staff from the beginning record reach optical line by end, then this step complete.Wherein, the length of above-mentioned homogeneous section is preferably small
The spatial resolution of sensor-based system where the optical fiber.In order to the optical fiber route topological most accurately reflected on map,
It should will be set to be equal to or less than the spatial resolution of optical fiber sensing system.For example, if spatial resolution is 3 meters,
Interval can be set to 2 meters or 3 meters.
If the present invention is effectively, because it requires field technician to remember by the endpoint for the main section for obtaining optical fiber
The point quantity of record wants much less or the present invention that can be automatically recorded by positioning device with preset distance interval.
It in other embodiments, can if the step of above-mentioned steps S120 obtains the endpoint terrestrial reference of the main section of composition optical fiber
Think the coordinate of map where directly acquiring the Fibre Optical Sensor point, and replaces Fibre Optical Sensor point using the coordinate of map
Terrestrial reference.Under certain deployment scenarios, field technician possibly can not set foot in optical line by field in.For example, optical line
Coil holder is set to the top of skyscraper or railway.In this case, optical line is by being likely to and rail route or skyscraper
The street at place is parallel.Therefore, the present invention directly can replace actual optical line using railway or the map terrestrial reference in street
Line terrestrial reference.Clearly this reduces the record of technical staff points.So in some cases, actual optical line is by can be by
The route routing substitution completely of institute's monitoring objective (such as railway).
Step S140: line segment where Fibre Optical Sensor point is obtained.
The step obtains the optical distance information of Fibre Optical Sensor point first.That is, Fibre Optical Sensor point is sensed apart from starting point
The distance of host position.The range information of Fibre Optical Sensor point can be directly acquired by optical time domain reflectometer (OTDR).So
Afterwards, judge which line segment its specific location is set in.
Step S160: the ground of the Fibre Optical Sensor point is obtained according to the endpoint terrestrial reference of line segment where the Fibre Optical Sensor point
Mark.
Above-mentioned line segment is the line segment close to straight line, can be by geometric operation method, by where Fibre Optical Sensor point
The endpoint terrestrial reference of line segment, calculates the terrestrial reference of Fibre Optical Sensor point.
The terrestrial reference of Fibre Optical Sensor point can according to circumstances, for two-dimentional (longitude, dimension) or three-dimensional (longitude, latitude, height above sea level
Highly).Below by taking most complicated three-dimensional situation as an example, circular be can be such that
OTDR can be used to obtain the optical distance of each sensing points along optical fiber route in the present invention.This is one and is not required to
Want the auto-programming of human intervention.
The distance of each sensing point is defined as the optical distance with starting point (this is also the position for sensing host).
The sensing data and terrestrial reference of its sensing point are shown as follows:
OTDR[N]{
distance；
sensing_data；
map_x；
map_y；
map_z；}
Wherein, in above structure, N is defined as total sensing points on optical fiber.Wherein, X-axis indicates that longitude, Y-axis indicate latitude
Degree, Z axis indicate height above sea level.
Using similar definition, the optical line of acquisition is recorded by the following seal of endpoint of upper line segment:
ROUTE[M]{
distance；
map_x；
map_y；
map_z；}
Note: wherein M is the total points recorded by technical staff along optical fiber route.Wherein, X-axis indicates longitude, Y-axis table
Show that latitude, Z axis indicate height above sea level.
Firstly, being based on the optical distance of specific sensing points [m] (OTDR [m] distance), two phases of the optical line in are obtained
Adjoint point:
ROUTE[n].distance<OTDR[m].distance<ROUTE[n+1].distance
Wherein, n and n+1 indicates optical line by two adjacent points, and specific sensing points are on optical fiber in point n and point n+1
Between.
As shown in Fig. 2, the relative distance calculating between three points is as follows, it is sensing points [m] terrestrial reference X-axis numerical value meter below
It calculates:
L(n, m)=OTDR [m] .distance-ROUTE [n] .distance
L(n, n+1)=ROUTE [n+1] .distance-ROUTE [n] .distance
L(n_x, m_x)=OTDR [m] .map_x-ROUTE [n] .map-x
L(n_x, n+1_x)=ROUTE [n+1] .map-x-ROUTE [n] .map-x
Wherein, L (n, m) indicates the distance of point m to point n, and L (n, n+1) indicates the distance of point n+1 to point n, L (n_x, m_x)
M point and n point are indicated in the projector distance of X-axis, L (n_x, n+1_x) indicates n point and n+1 point in the projector distance of X-axis.
Relationship between these relative distances can be indicated with following formula:
To which sensing points [m] terrestrial reference X-axis numerical value can pass through following formula derivation:
Similar, Y-axis and Z axis numerical value can be calculated with identical method and be obtained
However, the route of optical fiber is a two-dimentional integration system in most of deployment scenarios.In such scene, Z
Axis terrestrial reference is not required.One special scene is exactly that the route of optical fiber is straight line.For example, DTS fiber deployment is one
A tunnel environment.The scene of such simplification, only X terrestrial reference are necessary.So in one-dimensional coordinate system, sensing point [m] X-axis
Terrestrial reference calculates as follows:
OTDR [m] .map_x=ROUTE [n.] map_x+L(n, m)
With reference to Fig. 3, the invention also includes a kind of landmark locations acquisition device 200, for obtaining the terrestrial reference of Fibre Optical Sensor point
Position.The device obtains sensing point terrestrial reference by using the above method 100.The device 200 specifically includes: first obtains module
220, second obtains module 240 and third acquisition module 260.
Wherein, if first obtains the endpoint terrestrial reference that module 220 obtains the main section of composition optical fiber, second obtains module 240
Line segment where obtaining Fibre Optical Sensor point, third obtain module 260 and are obtained according to the endpoint terrestrial reference of line segment where the Fibre Optical Sensor point
Take the terrestrial reference of the Fibre Optical Sensor point.
Wherein, the first acquisition module 220 further comprises: first acquisition unit 222 is turned for obtaining the optical fiber
Point terrestrial reference.
In other examples, the first acquisition module 220 can further include: second acquisition unit 224,
For obtaining several homogeneous section endpoint terrestrial references of the optical fiber.
Wherein, the spatial resolution of sensor-based system where the length of the homogeneous section is less than the optical fiber.
In other examples, the first acquisition module 220 can further include: third acquiring unit 226,
Coordinate for map where obtaining the Fibre Optical Sensor point.
Wherein, above-mentioned first acquisition module 220 may include above-mentioned first acquisition unit 222, second acquisition unit 224 with
And one or more in third acquiring unit 226.Any mode is used in this way, can be specifically chosen according to the actual situation
Calculate the terrestrial reference of sensing point.
Landmark locations acquisition methods of the invention and device, if with being made up of the endpoint of the main section of optical fiber acquisition
Then mark obtains institute according to the endpoint terrestrial reference of line segment where the Fibre Optical Sensor point by line segment where judging Fibre Optical Sensor point
State the terrestrial reference of Fibre Optical Sensor point.Landmark locations acquisition methods of the invention and device pass through manual measurement instead of tradition completely
The method for obtaining the landmark locations of Fibre Optical Sensor point, what the cost and Fibre Optical Sensor point terrestrial reference for greatly reducing fiber deployment obtained
Difficulty.
The present invention claims the point quantity that field technician to be recorded to want much less, or can be by positioning device with default
Distance interval automatically record；It is capable of sensing point position on the determination map of high precision；Eliminate the process hand of using trouble
The needs of dynamic matching sensing points, find sensing point to use Fibre Optical Sensor host by making optical fiber be subjected to temperature or strain variation
Distance.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of landmark locations acquisition methods, for obtaining the landmark locations of Fibre Optical Sensor point, which is characterized in that including walking as follows
It is rapid:
If obtaining the endpoint terrestrial reference of the main section of composition optical fiber；
Line segment where obtaining Fibre Optical Sensor point；
The terrestrial reference of the Fibre Optical Sensor point is obtained according to the endpoint terrestrial reference of line segment where the Fibre Optical Sensor point.
2. landmark locations acquisition methods according to claim 1, which is characterized in that if the main line for obtaining composition optical fiber
Section endpoint terrestrial reference the step of, for obtain the optical fiber inflection point terrestrial reference the step of.
3. landmark locations acquisition methods according to claim 1, which is characterized in that if the main line for obtaining composition optical fiber
The step of the step of endpoint terrestrial reference of section, homogeneous section endpoint terrestrial references several for the acquisition optical fiber.
4. landmark locations acquisition methods according to claim 3, which is characterized in that the length of the homogeneous section is less than institute
The spatial resolution of sensor-based system where stating optical fiber.
5. landmark locations acquisition methods according to claim 1, which is characterized in that the end for obtaining several optical fiber line segments
The step of point terrestrial reference, for the coordinate for obtaining Fibre Optical Sensor point place map.
6. a kind of landmark locations acquisition device, for obtaining the landmark locations of Fibre Optical Sensor point characterized by comprising
First obtains module, if the endpoint terrestrial reference of the main section for obtaining composition optical fiber；
Second obtains module, for line segment where obtaining Fibre Optical Sensor point；
Third obtains module, for obtaining the Fibre Optical Sensor point according to the endpoint terrestrial reference of line segment where the Fibre Optical Sensor point
Terrestrial reference.
7. landmark locations acquisition device according to claim 6, which is characterized in that the first acquisition module is further wrapped
It includes: first acquisition unit, for obtaining the optical fiber inflection point terrestrial reference.
8. landmark locations acquisition device according to claim 6, which is characterized in that the first acquisition module is further wrapped
It includes: second acquisition unit, for obtaining several homogeneous section endpoint terrestrial references of the optical fiber.
9. landmark locations acquisition device according to claim 8, which is characterized in that the length of the homogeneous section is less than institute
The spatial resolution of sensor-based system where stating optical fiber.
10. landmark locations acquisition device according to claim 6, which is characterized in that the first acquisition module is further
It include: third acquiring unit, the coordinate for map where obtaining the Fibre Optical Sensor point.
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Cited By (1)
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| CN115311805A (en) * | 2022-08-18 | 2022-11-08 | 重庆大学 | Fire-fighting safety system integrating multi-parameter sensing and signal processing method |
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