CN206057212U - Transmission line equipment salt dense system based on optical fiber collimator - Google Patents
Transmission line equipment salt dense system based on optical fiber collimator Download PDFInfo
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- CN206057212U CN206057212U CN201621078340.7U CN201621078340U CN206057212U CN 206057212 U CN206057212 U CN 206057212U CN 201621078340 U CN201621078340 U CN 201621078340U CN 206057212 U CN206057212 U CN 206057212U
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- optical fiber
- salt
- collimator
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- fiber collimator
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Abstract
This utility model provides a kind of transmission line equipment salt dense system based on optical fiber collimator, including：Laser instrument, for emission detection light；Optical fiber collimator sensor probe, is contacted with testing medium；Fiber coupler, is coupled with the fiber optic collimator sensing head, for the detection light is transferred into and out the optical fiber collimator sensor probe；Photoelectric probe, is coupled with the fiber coupler, for being received from the light data that the optical fiber collimator sensor probe is reflected；And processing unit, the salt for processing the light data to obtain the testing medium is close.The transmission line of electricity salt dense system operability based on optical fiber collimator that this utility model is provided is strong, it is easy to install on a large scale, simple structure, relative inexpensiveness, anti-electromagnetic interference capability are strong.
Description
Technical field
This utility model relates to the use of optical instrument carries out the technical field of pollutant measurement monitoring to transmission line equipment,
More particularly to a kind of transmission line equipment salt dense system based on optical fiber collimator.
Background technology
Transmission line of electricity surface is easy to be affected by operating area environmental contaminants, so that the pollution of insulator surface accumulation
The thing time of tide is caused insulation breakdown flashover, insulation flashover to be then likely to result in accident, affects the safety of transmission line of electricity.To guarantee safety
Reliable power supply, power department must be cleaned to insulator chain by predetermined period, and cleaning period interval is depending on pollutant
Salt density value.In order to determine the reasonable period of preventive maintenance, it is ensured that the safe operation of electrical network, it is therefore desirable to set up transmission line of electricity salt
Close monitoring system, to implement to monitor to insulation status, it is to avoid due to the grid pollution flashover accident that environmental pollution is caused.
In the close sensing technology of various salt, optical fiber equal salt deposit density sensing technology increasingly receives publicity, because relative to which
For the close sensing technology of its salt, optical fiber equal salt deposit density sensing technology has the advantages that and projects that for example, sensing element is without the need for electronics a large amount of
Unit, burn-proof and explosion prevention anticorrosion, sensitivity height, flexible pliable, anti-electromagnetic interference, can work at high temperature under high pressure, sensor
Simple structure is compact, easily realize distant signal transmission and loss of signal is little etc..With economic fast development, electrical network scale
Expansion, air quality decline, antifouling work work also need to do very big effort.
Although existing transmission line of electricity salinity measuring system has had various designs, all there is various deficiencies, example
Such as：Some schemes (such as patent CN103645157B) are peelled off at the top of inverted U optical fiber outer using a presentation inverted U optical fiber
Skin, and its coat is peelled off, using the bare fibre for being formed come what is detected, this scheme seems simple, but actually operates
Come exist it cannot be guaranteed that during batch making properties of product concordance, and fixation not easy to install, the reflective light intensity for detecting are little etc.
Problem；The scheme (such as patent CN102768183B) and for example having monitors transmission line of electricity salinity, but this using Bragg grating
The scheme of kind needs special Wavelength demodulation equipment, and its equipment price is expensive so that the practicality of scheme itself is had a greatly reduced quality；And for example
Some schemes (such as patent application CN101793659A) though propose the close monitoring scheme of the salt for being also based on Fibre Optical Sensor, its
Optical fiber to sensing has special requirement, and the versatility of its sensor fibre is simultaneously bad；Again again if any scheme (such as patent
CN101101265B) propose using multiple photo-detector groups to monitor the salt density of power transmission and transforming equipment, but the core of this scheme
Electronic sensor is also based on, the electromagnetism interference of the program is not good, during especially for high-tension power transmission and transformation equipment, system
Stability, practicality need to be considered.
Utility model content
The purpose of this utility model is, solve salt dense system simplicity present in prior art, versatility and
The not enough problem of stability.
The purpose of this utility model employs the following technical solutions to realize.
A kind of transmission line equipment salt dense system based on optical fiber collimator, including：Laser instrument, for emission detection
Light；Optical fiber collimator sensor probe, is contacted with testing medium；Fiber coupler, is coupled with the fiber optic collimator sensing head, is used for
The detection light Jing optical fiber is transferred into and out into the optical fiber collimator sensor probe；Photoelectric probe, with the fiber coupler
Coupling, for being received from the light data that the optical fiber collimator sensor probe is reflected；And processing unit, for processing
It is close to obtain the salt of the testing medium to state light data.
A kind of transmission line equipment salt dense system based on optical fiber collimator, including：Laser instrument, for emission detection
Light；The close sensor measuring path of one salt, successively including the first fiber coupler, the second fiber coupler and optical fiber collimator
Sensor probe, the detection light enter the close sensor measuring path of the salt, and the optical fiber collimator sensor probe is treated for measurement
Survey medium salt close；One standard correction sensing pathway, successively including the first fiber coupler, the 3rd fiber coupler, Yi Jiguang
Fine sensing head, the detection light enter the standard correction sensing pathway, and the optical fiber sensor head is placed in the air cartridge of sealing；
One the first photoelectric probe, and second fiber coupler connection is receiving the number that the optical fiber collimator sensor probe is returned
According to；One the second photoelectric probe, and the 3rd fiber coupler connection is receiving the data that the optical fiber sensor head is returned；Place
Reason unit, the data for analyzing and processing the first, second photoelectric probe collection are close with the salt for obtaining the testing medium.
Compared to prior art, the transmission line of electricity salt dense system based on optical fiber collimator that this utility model is provided is led to
Strong, workable with property, it is easy to install on a large scale, simple structure, relative inexpensiveness, anti-electromagnetic interference capability are strong.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of description, and in order to allow above and other purpose of the present utility model, feature
Can become apparent with advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Description of the drawings
Fig. 1 is the transmission line equipment salt dense system based on optical fiber collimator that this utility model first embodiment is provided
The structural representation of system.
Fig. 2 is reflective light intensity and the close graph of relation of salt.
Fig. 3 is the graph of relation of reflective light intensity and drop number.
Fig. 4 is the transmission line equipment salt dense system based on optical fiber collimator that this utility model second embodiment is provided
The structural representation of system.
Specific embodiment
For the ease of understanding this utility model, this utility model is more fully retouched below with reference to relevant drawings
State.Better embodiment of the present utility model is given in accompanying drawing.But, this utility model can come in many different forms
Realize, however it is not limited to embodiments described herein.On the contrary, the purpose for providing these embodiments is to make to this practicality newly
It is more thorough comprehensive that the disclosure of type understands.
Unless otherwise defined, all of technology used herein and scientific terminology are led with technology of the present utility model is belonged to
The implication that the technical staff in domain is generally understood that is identical.In term used in the description of the present utility model it is simply herein
The purpose of description specific embodiment, it is not intended that in limiting this utility model.Term as used herein " and/or " bag
Include the arbitrary and all of combination of one or more related Listed Items.
Embodiment 1
Refer to Fig. 1, the transmission line of electricity salt dense based on optical fiber collimator that this utility model first embodiment is provided
System 100 includes：One laser instrument 101, fiber coupler 102, optical fiber collimator sensor probe 103, photoelectric probe 104, place
Reason unit 105.
The light that laser instrument 101 sends enters optical fiber collimator sensor probe 103, fiber optic collimator through fiber coupler 102
After device sensor probe 103 probes into testing medium 106, have on the interface of testing medium 106 and optical fiber collimator sensor probe 103
Light beam is reflected into optical fiber collimator sensor probe 103, then enters photoelectric probe 104 through optical fiber, fiber coupler 102,
Data processing is carried out by processing unit 105 finally, the salt of corresponding testing medium 106 is obtained so as to according to the light intensity value for obtaining
Close value.
On the end face of optical fiber collimator sensor probe 103, return loss is by the difference with material refractive index on separating surface
And change, and, when separating surface is bigger, the transducing signal light intensity being reflected back is bigger, and the signal to noise ratio of system is higher, more beneficial to long-range
Long-distance sensing.This provides theoretical basiss to measure salt density value.Two test cases presented below：
First, appropriate Sodium Chloride is weighed with electronic scale first, be placed in clean beaker, add appropriate deionized water
The sample of the different salt density of configuration.Using optical fiber collimator sensor probe as the close sensor probe of salt, the Sodium Chloride for having configured is put in
In sample (probe is not contacted with other objects).Experiment is measured to different salinity sample respectively successively, while record is corresponding
Reflective light intensity, draw relation between salinity light intensity (note：Salt dense can be represented with salimity measurement).It is anti-with what is measured
It is vertical coordinate to penetrate light intensity, and salinity is abscissa, makes corresponding relation curve as shown in Figure 2.
It can be seen that the one-to-one dependence of dullness between the reflective light intensity for measuring and salinity, is there is, and linearly
Degree is fine, and R values reach 0.99 or so, and (R represents degree of fitting R-square here, refers to and is fitted by the test data point in Fig. 2
The formula that goes out can in much degree " truly " reflect the rule of test data.Between " real measured physics law "
Can there is certain deviation.Degree of fitting R is higher, shows that the goodness of fit is higher between formula and measured data).
Therefore, the transmission line equipment salt dense system based on optical fiber collimator that this utility model first embodiment is provided
System can obtain salt density value by reflective light intensity.
2nd, with the conductive materials in Sodium Chloride simulated air, by reflective light intensity come detection fiber collimator sensor probe
The micro salt content of the crystalline solid of end face.The NaCl solution that concentration is 2% is drawn with liquid-transfering gun, Deca is visited in collimator successively
On the end face of head, the quality of solute is increased into integral multiple, reduce error.Change of the light intensity under different number of drops
Fig. 3 is referred to, vertical coordinate represents reflective light intensity, and abscissa represents drop number.As seen from Figure 3 as air-dry time is elapsed, light
Strong stable reading is in certain value.As can be seen here, the recorded reading of optical fiber collimator sensor probe and optical fiber collimator sensor probe
The quality of the Sodium Chloride crystalline solid of end face has positively related relation.
Therefore, the transmission line equipment salt dense system based on optical fiber collimator that this utility model first embodiment is provided
System is except obtaining salt density value by reflective light intensity, additionally it is possible to obtain salt quality.
Embodiment 2
Refer to Fig. 4, the transmission line of electricity salt dense based on optical fiber collimator that this utility model second embodiment is provided
System 200 includes：One laser instrument 20, the first fiber coupler 21, the second fiber coupler 22, the 3rd fiber coupler 23,
Single-mode fiber sensing head 26, optical fiber collimator sensor probe 28, the first photoelectric probe 29, the second photoelectric probe 30 and process are single
Unit 31, including data acquisition unit 311 and processing circuit module 312.
The optical maser wavelength that laser instrument 20 sends can be 1550nm, but not limited to this.
First fiber coupler 21, the second fiber coupler 22, and optical fiber collimator sensor probe 28 form salt all the way
Close sensor measuring path, optical fiber collimator sensor probe 28 are close for measuring testing medium salt.
First fiber coupler 21, the 3rd fiber coupler 23, and single-mode fiber sensing head 26 formed one article of standard school
Positive sensing pathway, single-mode fiber sensing head 26 are inserted in the air cartridge 14 of sealing as reference.
First photoelectric probe 29 and the close sensor measuring path connection of salt, the second photoelectric probe 30 and standard correction sensing pathway
Connection, and data acquisition unit 311 is entered data into, analyzed and processed by processing circuit module 312.
Preferably, the end face 280 of the optical fiber collimator sensor probe 28 is vertical with incident beam.
Preferably, the splitting ratio of first, second, third fiber coupler 21,22,23 is 50:50.
(light intensity is I to the laser beam sent from laser instrument 200) B1 and B2 two-way is divided into by the first fiber coupler 21 first,
A part of light B1 enters the close sensor measuring path of salt through the second fiber coupler 22, and optical signal is visited by optical fiber collimator sensing
28 enter in testing medium 15, and emergent light runs into the boundary contact surface of optical fiber collimator sensor probe 28 and testing medium 15,
Then part light is reflected back toward the second fiber coupler 22, and the light beam B1 ' of formation is received by the first photoelectric probe 29.
Another part light B2 enters standard correction sensing pathway, standard correction sensing pathway through the 3rd fiber coupler 23
Using fixed single-mode fiber sensing head 26, the light into single-mode fiber sensing head 26 is in sensing head and the contact interface quilt of air
Part is reflected back the 3rd fiber coupler 23, and the light beam B2 ' of formation is received by the second photoelectric probe 30.
Second fiber coupler 22 has in another light path for separating in addition to connecting optical fiber collimator sensor probe 28
Have a first optical fiber output port 25, the 3rd fiber coupler 23 in addition to connecting single-mode fiber sensing head 26, another
There is a second optical fiber output port 27, it is preferable that in order to eliminate returning for the two optical fiber output ports in the light path for separating
Ripple is lost, using the winding post processing of beveling port.
From Fresnel law, different refractivity separating surface has reflection to light.When light (remembers that incident intensity is
Iin) vertical incidence when, reflective light intensity IrFor：
nsensorIt is refractive index, the n of sensor probexIt is testing medium refractive index.
In the present embodiment, after the optical power fluctuation and loss of meter and involved some fiber couplers, the first photoelectricity
Probe 29 receives light intensity I1For：
Wherein nsensorAnd nxRespectively optical fiber collimator sensor probe 28 with it is to be measured be situated between 15 refractive index, β1、β1', β2、β2'
And β3、β3' it is respectively two output ports point of the second fiber coupler 22, the 3rd fiber coupler 23, the first fiber coupler 21
Light intensity splitting ratio not with same input port, wherein having contained the added losses of respective fiber coupler.
Photoelectric probe 30 receives light intensity：
The light intensity difference of two photoelectric probe is：
(2) and (3) formula is substituted into into (4) formula, can be obtained：
WhereinFor a constant, determined by each fiber coupler coefficient of coup, nsensorIt is
The refractive index of optical fiber collimator sensor probe 28, air refraction n0It is known constant.
When optical fiber collimator sensor probe 28 is positioned in air, there is nx=n0, directly can survey thus according to (5) formula
Measure out constant
For the testing medium 15 of the close content of different salt, its equivalent salt density value is different, corresponding equivalent (average) refractive index
nxAlso by difference, reflective light intensity difference Δ I can be drawn from (5) formula thus is also changed therewith.It is possible thereby to measure with instead
Penetrate the associated close parameter of salt of light intensity difference.
It is known that measurement result with light source intensity I by (5) formula0It is unrelated, i.e., using this utility model second embodiment
The salt dense system of offer can not only measure salt density value, can also eliminate the unstability pair that environmental change is caused to light source
The impact of measured value.
Through test, under identical Variation of Salinity Condition, using optical fiber collimator sensor probe and ordinary optic fibre sensing head (for example
Single-mode fiber sensing head) contrast and experiment show：The intensity of reflected light drawn using optical fiber collimator sensor probe measurement
It is the several times of the intensity of reflected light drawn using ordinary optic fibre probe measurement, and the two light intensity difference is with the rising of measurement salt density
And increase.This means, under same light source and external environmental condition, to do sensor probe using optical fiber collimator and salt can be caused close
Under equivalent environment noise, retroreflective signs intensity has larger enhancing to measuring system so that the effective signal-to-noise ratio of system has larger carrying
Height, such that it is able to extended fiber distance sensing.
The salt dense system 200 that this utility model second embodiment is provided is adapted to the salt for measuring transmission line equipment
Degree, practical, the systematic survey sensitivity is higher, easy to operate, it is easy to install on a large scale, simple structure, cost are relatively low
Honest and clean, anti-electromagnetic interference capability is strong, also has the advantages that real-time online is remotely supervised.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more concrete and detailed,
But therefore can not be interpreted as the restriction to this utility model the scope of the claims.It should be pointed out that common for this area
For technical staff, without departing from the concept of the premise utility, some deformations and improvement can also be made, these all belong to
In protection domain of the present utility model.
Claims (8)
1. a kind of transmission line equipment salt dense system based on optical fiber collimator, it is characterised in that include：
Laser instrument, for emission detection light；
Optical fiber collimator sensor probe, is contacted with testing medium；
Fiber coupler, is coupled with the fiber optic collimator sensing head, described for the detection light Jing optical fiber is transferred into and out
Optical fiber collimator sensor probe；
Photoelectric probe, is coupled with the fiber coupler, for being received from what the optical fiber collimator sensor probe was reflected
Light data；And
Processing unit, for processing the light data so as to the salt for obtaining the testing medium is close.
2. a kind of transmission line equipment salt dense system based on optical fiber collimator, it is characterised in that include：
Laser instrument, for emission detection light；
The close sensor measuring path of one salt, successively including the first fiber coupler, the second fiber coupler and optical fiber collimator
Sensor probe, the detection light enter the close sensor measuring path of the salt, and the optical fiber collimator sensor probe is treated for measurement
Survey medium salt close；
One standard correction sensing pathway, successively including the first fiber coupler, the 3rd fiber coupler and Fibre Optical Sensor
Head, the detection light enter the standard correction sensing pathway, and the optical fiber sensor head is placed in the air cartridge of sealing；
One the first photoelectric probe, and second fiber coupler connection returned with receiving the optical fiber collimator sensor probe
Data；
One the second photoelectric probe, and the 3rd fiber coupler connection is receiving the data that the optical fiber sensor head is returned；
Processing unit, for analyzing and processing the data of the first, second photoelectric probe collection to obtain the testing medium
Salt is close.
3. salt dense system as claimed in claim 2, it is characterised in that elicite between first, second photoelectric probe
Light intensity difference be Δ I, be expressed as：
Wherein, K is constant, is determined by the coefficient of coup of first, second, third fiber coupler, nsensorIt is the optical fiber
The refractive index of collimator sensor probe, n0It is air refraction, calculates nxIt is close with the salt for obtaining the testing medium.
4. salt dense system as claimed in claim 2, it is characterised in that the end face of the optical fiber collimator sensor probe with
Incident beam is vertical.
5. salt dense system as claimed in claim 2, it is characterised in that first, second, third fiber coupler
Splitting ratio is 50:50.
6. salt dense system as claimed in claim 2, it is characterised in that the processing unit include data acquisition unit and
Processing circuit module.
7. salt dense system as claimed in claim 2, it is characterised in that the optical fiber sensor head is single-mode fiber sensing
Head.
8. salt dense system as claimed in claim 2, it is characterised in that described second, third fiber coupler is separated
Other fiber ports in addition to the optical fiber collimator sensor probe and the optical fiber sensor head twined using beveling ports
Around process, to eliminate return loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621078340.7U CN206057212U (en) | 2016-09-23 | 2016-09-23 | Transmission line equipment salt dense system based on optical fiber collimator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621078340.7U CN206057212U (en) | 2016-09-23 | 2016-09-23 | Transmission line equipment salt dense system based on optical fiber collimator |
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| Publication Number | Publication Date |
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| CN206057212U true CN206057212U (en) | 2017-03-29 |
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| CN201621078340.7U Expired - Fee Related CN206057212U (en) | 2016-09-23 | 2016-09-23 | Transmission line equipment salt dense system based on optical fiber collimator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168581A (en) * | 2016-09-23 | 2016-11-30 | 华南师范大学 | Transmission line equipment salt dense system and method based on optical fiber collimator |
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2016
- 2016-09-23 CN CN201621078340.7U patent/CN206057212U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168581A (en) * | 2016-09-23 | 2016-11-30 | 华南师范大学 | Transmission line equipment salt dense system and method based on optical fiber collimator |
| CN106168581B (en) * | 2016-09-23 | 2019-04-30 | 华南师范大学 | Transmission line equipment salt dense system and method based on optical fiber collimator |
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Granted publication date: 20170329 Termination date: 20170923 |