CN106092366A - A kind of carbon brush monitoring system - Google Patents
A kind of carbon brush monitoring system Download PDFInfo
- Publication number
- CN106092366A CN106092366A CN201610363068.5A CN201610363068A CN106092366A CN 106092366 A CN106092366 A CN 106092366A CN 201610363068 A CN201610363068 A CN 201610363068A CN 106092366 A CN106092366 A CN 106092366A
- Authority
- CN
- China
- Prior art keywords
- carbon brush
- optical
- monitoring means
- temperature
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 82
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000012544 monitoring process Methods 0.000 title claims abstract description 79
- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims description 27
- 239000013307 optical fiber Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 238000012423 maintenance Methods 0.000 claims description 7
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 238000007689 inspection Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 10
- 238000005538 encapsulation Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 150000001721 carbon Chemical class 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000008844 regulatory mechanism Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 206010063045 Effusion Diseases 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2205/00—Application of thermometers in motors, e.g. of a vehicle
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a kind of carbon brush monitoring system, including the monitoring means for monitoring carbon brush state, it also includes, the light source cell being connected with monitoring means and conversion unit, and the processing unit being connected with conversion unit；Described light source cell provides light as exciting signal source for described monitoring means；Described monitoring means can variation with temperature and the light wave of the light injected is occurred sensing change, and by this optical signal feedback to described conversion unit；The optical signal that described monitoring means feedback is come is converted into the corresponding signal of telecommunication by described conversion unit；The signal of telecommunication obtained is calculated, processes by described processing unit, completes the real time on-line monitoring to carbon brush temperature.The present invention, it can be avoided that the artificial mode patrolled and examined, reduces human cost, economizes on resources, and can be prevented effectively from the security risk during manual inspection.
Description
Technical field
The invention belongs to generator-temperature detection monitoring technical field, the carbon brush monitoring system of a kind of electromotor.
Background technology
Carbon brush is that electromotor sound contacts and the equipment of positive energy exchange with slip ring, is the important composition of generator excited system
Part.But due to a lot of reasons in Yun Hanging, superheating phenomenon occurs often, seriously jeopardizes the safe operation of electromotor.In order to protect
Card unit safety stable operation, to the maintenance of specification carbon brush, all there are strict requirements in power plant, and carbon brush thermometric is in carbon brush regular maintenance
Very important one, general by infrared thermometer periodic measurement carbon brush temperature, owing to the working environment of carbon brush equipment is subject to
The various factors impacts such as dust, infrared thermometer often cannot obtain reliable temperature data, and monitoring time interval is longer,
Real time on-line monitoring cannot be realized, it is impossible to find fault in real time.
Carbon brush normal operating temperature is usually 50 DEG C～80 DEG C (exceeding about 40 DEG C than ambient temperature), carbon brush CURRENT DISTRIBUTION
Entirety compares balance, and every block of carbon brush operating current is at 20-100A.Brush spring pressure ratio is more uniform, and carbon brush activity is freely and nothing
Vibrations bite phenomenon.The heat that carbon brush produces in running with collector ring is taken away by ventilating system, i.e. generates heat and heat radiation basically reaches
Balance.Under normal operating condition, when load increases electric current increase or indivedual carbon brush operating mode is deteriorated, temperature has trace in short-term and increases
Adding, system is able to maintain that the poised state balancing or reaching new.If but carbon brush shortens, brush spring pressure diminishes, contact
Resistance becomes big, carbon brush operating condition variation, and when operating current increase, variations in temperature, the balanced capacity of system reduces, part carbon
Brush temperature will raise, thus cause whole system temperature to raise, the most uncontrollable state.Adstante febre carbon brush and collection
Electricity ring temperature is up to more than 100 DEG C, is up to 200 DEG C time the most serious--and 300 DEG C.Now carbon brush duty is worse and worse, carbon brush
CURRENT DISTRIBUTION is the most uneven, and minority carbon brush electric current reaches 300A, and other carbon brush electric currents are close to 0.A large amount of carbon brush occur not
Beating normally or bite, and substantial amounts of spark occur, shunt welding is blown or takes off pigtail；Carbon brush and the collector ring grating change of tune obtain sharply
Ear-piercing, until causing collector ring ring fire.
Carbon brush thermometric currently mainly has: (1) measures the temperature of carbon brush by regularly tours of inspection；(2) infrared ray is passed through
Temperature measurement on-line mode realizes；(3) realized by electric transducer temperature measurement on-line mode.The most traditional several method, enters carbon brush
Trip temperature is monitored, and all cannot accomplish that 100% is reliable, especially for the unit that carbon brush fault rate is high, can thereby result in unit non-
Planned outage stops, and system causes bad impact, power plant also brings along bad economic loss simultaneously.Human at periodic intervals patrols and examines
Expending substantial amounts of human and material resources, human at periodic intervals makes an inspection tour in can not finding the short time fault automatically recovered, it is impossible to the most early send out
Potential safety hazard existing, that abatement apparatus is potential.Meanwhile, site environment is complicated, and infrared measurement of temperature error is big；And traditional electric transducer needs
Sensor power to be given, can cause secondary failure because of temp measuring system itself, cause bigger loss
Summary of the invention
The purpose of this part is to summarize some aspects of embodiments of the invention and briefly introduce some preferably to implement
Example.Make a summary in this part and the description of the present application and denomination of invention may be done a little simplification or omit to avoid making our department
Point, the purpose of specification digest and denomination of invention obscure, and this simplification or omission cannot be used for limiting the scope of the present invention.
In view of problem present in above-mentioned and/or existing carbon brush monitoring system, it is proposed that the present invention.
Therefore, it is an object of the invention to provide the carbon brush monitoring system of a kind of electromotor, it is it can be avoided that artificial patrols and examines
Mode, reduce human cost, economize on resources, and the security risk during manual inspection can be prevented effectively from.
For solving above-mentioned technical problem, the present invention provides following technical scheme: a kind of carbon brush monitors system, including for supervising
The monitoring means of carbon determination brush state, it also includes, the light source cell being connected with monitoring means and conversion unit, and single with converting
The processing unit that unit is connected；Described light source cell provides light as exciting signal source for described monitoring means；Described monitoring
Unit can variation with temperature and the light wave of the light injected is occurred sensing change, and by this optical signal feedback to described turn
Changing unit, it includes that front end sensing optic cable, described front end sensing optic cable include the fiber-optical grating temperature sensor of gap variable, institute
State fiber-optical grating temperature sensor to be changed when ambient temperature changes by its effective refractive index and screen periods, thus lead
The reflection wavelength causing fiber grating is moved, and detects the temperature parameters of carbon brush；Described conversion unit is by described monitoring means
The optical signal that feedback is come is converted into the corresponding signal of telecommunication；The signal of telecommunication obtained is calculated, processes by described processing unit, complete
The real time on-line monitoring of carbon brush temperature in pairs.
As a kind of preferred version of carbon brush of the present invention monitoring system, wherein: described conversion unit includes detection
Device module, forward-propagating and the two ways of optical signals of back propagation in its receiving front-end sensing optic cable, and convert optical signals to electricity
Signal.
As a kind of preferred version of carbon brush of the present invention monitoring system, wherein: the echo of described fiber grating
Long being moved, it with the relation of variations in temperature is: △ λ g/ λ g=[ζs+(1-Pe)αsub] △ T, in formula: ζs=1/neff=△
Neff/ △ T is the thermo-optical coeffecient of optical fiber, describes optical fibre refractivity variation with temperature relation；Pe is the elasto-optical coefficient of optical fiber；
αsubThe thermal coefficient of expansion of the base material for pasting mutually with described fiber grating.
As a kind of preferred version of carbon brush of the present invention monitoring system, wherein: described light source cell includes adjustable
Humorous light source module, it includes that ASE light source, fibre optic isolater, fixed optical attenuator and tunable TEA CO2 laser, ASE light source send
Light pass through fixed optical attenuator so that the light being input to tunable TEA CO2 laser meets the restriction requirement of its entrance power,
Fibre optic isolater between ASE light source and tunable TEA CO2 laser is in order to ensure the direction of optic path.
As a kind of preferred version of carbon brush of the present invention monitoring system, wherein: described conversion unit, processing unit
And light source cell is arranged in equipment rack, and described monitoring means is connected with described carbon brush, and it passes through light each other
Cable connects.
As a kind of preferred version of carbon brush of the present invention monitoring system, wherein: described monitoring means sets with described
Connection unit it is provided with, in order to connect the optical cable extended from described monitoring means and to set with described on optical cable between standby host frame
The optical cable that standby host frame is connected.
As a kind of preferred version of carbon brush of the present invention monitoring system, wherein: described connection unit includes flange
Dish and adapter, it is simple to the connection between optical cable and demolition and maintenance.
As a kind of preferred version of carbon brush of the present invention monitoring system, wherein: described base material is that polyamides is sub-
Amine.
Beneficial effects of the present invention: the carbon brush monitoring system of the offer of the present invention, it is possible to the round-the-clock state to carbon brush is entered
Row monitoring, provides for power supply monitoring center and judges reference data accurately, it is ensured that electric power system stable operation；And it can be avoided that
The artificial mode patrolled and examined, reduces human cost, economizes on resources, and can be prevented effectively from the safety wind during manual inspection
Danger.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, required use in embodiment being described below
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for this
From the point of view of the those of ordinary skill of field, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.Wherein:
Fig. 1 is the principle schematic of the monitoring system of a kind of carbon brush described in one embodiment of the invention；
Fig. 2 is the structural representation of a kind of carbon brush of embodiment illustrated in fig. 1 of the present invention monitoring system；
Fig. 3 is the structural representation connecting unit described in embodiment illustrated in fig. 1 of the present invention.
Detailed description of the invention
Understandable, below in conjunction with Figure of description pair for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from
The detailed description of the invention of the present invention is described in detail.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but the present invention is all right
Using other to be different from alternate manner described here to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
Secondly, " embodiment " or " embodiment " referred to herein refers to may be included at least one realization side of the present invention
Special characteristic, structure or characteristic in formula.Different in this manual local " in one embodiment " occurred not refer both to
Same embodiment, is not single or the most mutually exclusive with other embodiments embodiment.
As it is shown in figure 1, Fig. 1 shows the principle schematic of a kind of carbon brush monitoring system.This carbon brush Application of Monitoring System in
On generator carbon brush, it is achieved the monitoring to carbon brush temperature.Carbon brush monitoring system in this embodiment, that includes for monitoring
The monitoring means 100 of carbon brush state, the light source cell 400 being connected with monitoring means 100 and conversion unit 200, and with conversion
The processing unit 300 that unit 200 is connected.Aforementioned four unit its be connected by optical cable each other, wherein, light source cell
400 provide light as exciting signal source for monitoring means 100；Monitoring means 100 can variation with temperature and to injecting
There is sensing change in the light wave of light, and by this optical signal feedback to conversion unit 200；Conversion unit 200 is by monitoring means 100
The optical signal that feedback is come is converted into the corresponding signal of telecommunication；The signal of telecommunication obtained is calculated, processes by processing unit 300, complete
The real time on-line monitoring of carbon brush temperature in pairs.
In this embodiment, monitoring means 100 includes that front end sensing optic cable, front end sensing optic cable include gap variable
Fiber-optical grating temperature sensor, in order to detect the temperature parameters of carbon brush.Fiber-optical grating temperature sensor passes through its effective refractive index
Change when ambient temperature changes with screen periods, thus cause the reflection wavelength of fiber grating to be moved, detect
The temperature parameters of carbon brush.
Effective refractive index and the screen periods of fiber grating can change when ambient temperature changes, and thus cause optical fiber
The reflection wavelength of grating is moved.The reason of the optical fiber Bragg raster centre wavelength drift that temperature causes mainly comprises two sides
Face: optical fiber thermo-optic effect and thermal expansion effects.The movement of fiber grating reflection wavelength is represented by with the relation of variations in temperature:
In formula: ζ=1/neff=△ neff/ △ T is the thermo-optical coeffecient of optical fiber, optical fibre refractivity variation with temperature is described
Relation；αs=1 △ λ/λ △ T is the thermal coefficient of expansion of optical fiber, describes the pitch variation with temperature relation of grating.Can from formula
To find out △ λsAnd linear between △ T, by measuring the mobile △ λ g of fiber grating reflection wavelength, just may determine that ring
Border temperature.Owing to the temperature coefficient of fiber grating is the least, individually do its sensitivity of sensing element with it the highest, in order to improve temperature
Sensitivity, can be pasted on fiber grating on the base material that thermal coefficient of expansion is bigger.If the thermal coefficient of expansion of base material is
αsub, and meet αsub" α, then after pasting, fiber grating reflection wavelength variation with temperature relation has given below: △ λ g/ λ g=
[ζs+(1-Pe)αsub] △ T, in formula: ζs=1/neff=△ neff/ △ T is the thermo-optical coeffecient of optical fiber, describe optical fibre refractivity with
The variation relation of temperature；Pe is the elasto-optical coefficient of optical fiber；αsubThe thermal expansion of the base material for pasting mutually with described fiber grating
Coefficient.Can be seen that between △ λ g and △ T linear from formula, by measuring the movement of fiber grating reflection wavelength, just
May determine that ambient temperature.
At present, FBG encapsulation most common method has two kinds:
1, FBG is affixed directly on base material, typically paster encapsulation, and the method is that the high temperature resistant organic gel of employing will
FBG is packaged on beryllium-bronze base material, and the linear expansion coefficient of base material is bigger than FBG, to improve its temperature control.
2, utilizing mould or tubing embedding, typically capillary tubing encapsulation, the method is that capillary tubing is enclosed within FBG
On, middle embedding modification acrylate, then put people's baking oven and dry further, solidify.
The advantage of method 2 is while not changing FBG ga(u)ge factor, improves its temperature control coefficient；Lack
Point is owing to the diameter of capillary tubing is the least, is unfavorable for that the envelope of modification acrylate fills.The shortcoming of method for packing 1 is to cause
The line non-homogeneous expansion of FBG is even, and therefore both method for packing are the most less desirable.In order to make up the deficiency of said method, we
Improved, to obtaining more preferably packaging effect in terms of encapsulating structure, encapsulating material and encapsulation binding agent.
In the present embodiment, inventor have developed the novel encapsulation technology with international advanced technology.First, nonmetal
Polyimide substrate material secondly make groove shapes, with exhausting the polyimide adhesive of vacuum by optical fiber Bragg grating encapsulation
In grooved substrate, this method ensure that sensor changed by ambient temperature affected time binding agent and base material permissible
Keeping the expansion of degree of the same race, the line non-homogeneous expansion greatly reducing FBG is even, it is ensured that sensor reliability and stability.?
After, then it being enclosed within outside sensor with glass bushing, AB glue seals two ends, and do so both ensure that the safety of sensor, also subtracts
The problem having lacked the cross sensitivity of stress and temperature.
Encapsulation design parameter:
That is, the fiber-optical grating temperature sensor of specific customization is arranged on carbon brush by this carbon brush monitoring system, optical fiber light
Grid temperature sensor after through light source cell 400 as exciting signal source incidence, by conversion unit 200 detect its reflection or
The optical signal transmitted, is allowed to be converted into the corresponding signal of telecommunication, and transformation result is transferred in processing unit 300, by processing
The signal obtained is calculated, processes by unit 300, finally completes carbon brush temperature real time on-line monitoring.
Concrete, light source cell 400 includes tunable optical source module, and it includes ASE light source (i.e. amplified spontaneous emission light
Source), fibre optic isolater, fixed optical attenuator and tunable TEA CO2 laser (Fabry-Perot wave filter), ASE light source sends
Light passes through fixed optical attenuator so that the light being input to tunable TEA CO2 laser meets the restriction requirement of its entrance power, ASE
Fibre optic isolater between light source and tunable TEA CO2 laser is in order to ensure the direction of optic path.Fibre optic isolater can be protected
The unidirectional operation of card light, prevents backlight from damaging other devices.Now, because temperature signal is carried in reflecting light,
By reflecting the transmission of light, monitoring means 100 collect, finally by ways such as demodulation, extract required temperature information.Cause
This, carbon brush monitoring system must have stable light source cell 400, provides carrier light signal for whole carbon brush monitoring system.Light source
The above-mentioned parts of unit 400 have regulatory mechanism, it is possible to according to practical situation regulating optical power, improve accuracy of detection, protect simultaneously
Card security of system.
In another embodiment, light source cell 400 includes, outside tunable optical source module, also including wavelength rectification module.
In this embodiment, pointed tunable optical source module also include ASE light source (i.e. amplified spontaneous emission source), optical fiber every
From device, fixed optical attenuator and tunable TEA CO2 laser (Fabry-Perot wave filter), the light that ASE light source sends is by fixing
Optical attenuator so that the light being input to tunable TEA CO2 laser meets the restriction requirement of its entrance power, and ASE light source is with adjustable
Fibre optic isolater between humorous F-P wave filter is in order to ensure the direction of optic path.Fibre optic isolater ensure that the unidirectional of light
Run, prevent backlight from damaging other devices.Now, because temperature signal is carried in reflecting light, by reflection light
Transmission, monitoring means 100 collect, finally by ways such as demodulation, extract required temperature information.Therefore, carbon brush prison
Examining system must have stable light source cell 400, provides carrier light signal for whole carbon brush monitoring system.Light source cell 400
Above-mentioned parts have regulatory mechanism, it is possible to according to practical situation regulating optical power, improve accuracy of detection, ensure system peace simultaneously
Entirely.But owing to initial optical signal is in transmitting procedure, signal can change, and wavelength rectification module is by Wavelength calibration, now, will
Tunable TEA CO2 laser obtains sampled point and the wavelength one_to_one corresponding of the spectrum signal of telecommunication, for tunable F-P light filter non-linear
Demarcate and reference wavelength is provided.Wavelength rectification module can increase substantially wavelength positioning precision, reduces owing to wave filter is non-linear
The error brought, plays demarcation effect to tunable light filter non-linear.After this module, can complete what high accuracy demodulated
Result.
It is preferred that wavelength rectification module is made up of F-P etalon and PIN detector.The part output of light source cell 400
Light distributes to fiber F-P etalon, conversion unit 200 optical signal that fiber F-P etalon exports is converted into voltage analog
Signal, and be input to capture card, capture card control scanning frame and obtain the spectrogram of fiber F-P etalon, pass through processing unit
300 carry out algorithm process, will be obtained the sampled point of the spectrum signal of telecommunication and wavelength one_to_one corresponding by tunable TEA CO2 laser, for can
Tuned light wave filter nonlinear calibration provides reference wavelength, thus is corrected tunable optical source output wavelength.Significantly carry
High wavelength positioning precision, reduces the error brought owing to wave filter is non-linear, to the demarcation of non-linear of tunable TEA CO2 laser
Effect.
Conversion unit 200 includes detector module, forward-propagating and the two of back propagation in its receiving front-end sensing optic cable
Road optical signal, and convert optical signals to the signal of telecommunication.The operation principle of conversion unit 200 is based on photoelectric effect.Photoelectric effect is
An important phenomenon in physics, metal surface, under photoirradiation effect, as long as the frequency of light exceedes a certain limiting frequency, is subject to
The metal surface Electron absorption photon energy that light irradiates is excited, and will launch electronics, i.e. photoelectric effect.Outside metal, add one
Individual Guan Bi circuit, adds forward power supply, and the photoelectron of these effusions all arrives at anode and just forms so-called photoelectric current, and then complete
Become light energy to electricity transformation of energy.
The optical signal collected is converted into voltage analog signal by detector module, and conversion unit 200 utilizes the electricity of input
Pressure analogue signal, exports analog or digital signal, controls tunable TEA CO2 laser, be finally returned to processing unit 300, complete
Become last data processing work.
It is noted herein that: carbon brush monitoring system also includes voltage cell (not shown), for in system
Other unit provide running voltage.In system, the running voltage of each unit not national standard electric power system is provided
220V, it is therefore desirable to have transformation system to realize the conversion of voltage.Voltage cell utilize external 220V power supply as input source, can
The output multiple voltage such as+5V ,+12V and+48V simultaneously, it is ensured that the work requirements of each unit.
Seeing Fig. 2 and Fig. 3, conversion unit 200, processing unit 300 and light source cell 400 are all arranged on equipment rack
In 500, and monitoring means 100 is connected with carbon brush, and it is connected by optical cable each other.Monitoring means 100 and equipment rack
Connection unit 600 it is additionally provided with, in order to connect the optical cable extended from monitoring means 100 and and equipment on optical cable between 500
The optical cable that frame 500 is connected.
During generator maintenance, equipment rack 500 entirety may hang away maintenance, therefore installs one in wind-tunnel Position Design
Connect unit 600 as equipment in equipment rack 500 (conversion unit 200, processing unit 300 and light source cell 400 etc.) and
The burble point of rear end equipment (monitoring means 100 etc.).Before equipment rack 500 needs entirety to hang away, it is thus only necessary to single connecting
In unit 600, optical connector 602 is extracted and can be realized separating.Connect unit 600 as it is shown on figure 3, connect unit 600 to include flange
Dish 601 and adapter 602, it is simple to the connection between optical cable and demolition and maintenance.
As it has been described above, the carbon brush monitoring system of the offer of the present invention, it is possible to the round-the-clock state to carbon brush is monitored, for
Power plant monitoring and control center provides and judges reference data accurately, it is ensured that electricity generation system stable operation；And it can be avoided that artificial patrols
The mode of inspection, reduces human cost, economizes on resources, and can be prevented effectively from the security risk during manual inspection.
It should be noted that above example is only in order to illustrate technical scheme and unrestricted, although with reference to preferably
The present invention has been described in detail by embodiment, it will be understood by those within the art that, can be to the technology of the present invention
Scheme is modified or equivalent, and without deviating from the spirit and scope of technical solution of the present invention, it all should be contained at this
In the middle of bright right.
Claims (8)
1. a carbon brush monitoring system, including the monitoring means (100) for monitoring carbon brush state, it is characterised in that: also include,
The light source cell (400) being connected with monitoring means (100) and conversion unit (200), and be connected with conversion unit (200)
Processing unit (300)；
Described light source cell (400) is that described monitoring means (100) provides light as exciting signal source；
Described monitoring means (100) can variation with temperature and the light wave of the light injected is occurred sensing change, and should
Optical signal feedback is to described conversion unit (200), and it includes that front end sensing optic cable, described front end sensing optic cable include gap variable
Fiber-optical grating temperature sensor, described fiber-optical grating temperature sensor by its effective refractive index and screen periods in extraneous temperature
Degree changes when changing, and thus causes the reflection wavelength of fiber grating to be moved, detects the temperature parameters of carbon brush；
The optical signal that described monitoring means (100) feedback is come is converted into the corresponding signal of telecommunication by described conversion unit (200)；
The signal of telecommunication obtained is calculated, processes by described processing unit (300), completes the prison of the real-time online to carbon brush temperature
Survey.
2. carbon brush monitoring system as claimed in claim 1, it is characterised in that: described conversion unit (200) includes detector mould
Block, forward-propagating and the two ways of optical signals of back propagation in its receiving front-end sensing optic cable, and convert optical signals to the signal of telecommunication.
3. carbon brush monitoring system as claimed in claim 1 or 2, it is characterised in that: the reflection wavelength of described fiber grating occurs
Mobile, it with the relation of variations in temperature is: △ λ g/ λ g=[ζs+(1-Pe)αsub] △ T, in formula: ζs=1/neff=△ neff/
△ T is the thermo-optical coeffecient of optical fiber, describes optical fibre refractivity variation with temperature relation；Pe is the elasto-optical coefficient of optical fiber；αsubFor with
The thermal coefficient of expansion of the base material that described fiber grating is pasted mutually.
4. carbon brush monitoring system as claimed in claim 3, it is characterised in that: described light source cell (400) includes tunable optical
Source module, it includes ASE light source, fibre optic isolater, fixed optical attenuator and tunable TEA CO2 laser, the light that ASE light source sends
Pass through fixed optical attenuator so that the light being input to tunable TEA CO2 laser meets the restriction requirement of its entrance power, ASE light
Fibre optic isolater between source and tunable TEA CO2 laser is in order to ensure the direction of optic path.
5. carbon brush monitoring system as claimed in claim 1, it is characterised in that: described conversion unit (200), processing unit
(300) and in light source cell (400) is arranged on equipment rack (500), and described monitoring means (100) is connected with described carbon brush
Connecing, it is connected by optical cable each other.
6. carbon brush monitoring system as claimed in claim 5, it is characterised in that: described monitoring means (100) and described equipment machine
Connection unit (600) it is provided with, in order to connect the light extended from described monitoring means (100) on optical cable between frame (500)
Cable and the optical cable being connected with described equipment rack (500).
7. carbon brush monitoring system as claimed in claim 6, it is characterised in that: described connection unit (600) includes ring flange
(601) and adapter (602), it is simple to the connection between optical cable and demolition and maintenance.
8. carbon brush monitoring system as claimed in claim 3, it is characterised in that: described base material is polyimides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610363068.5A CN106092366B (en) | 2016-05-27 | 2016-05-27 | A kind of carbon brush monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610363068.5A CN106092366B (en) | 2016-05-27 | 2016-05-27 | A kind of carbon brush monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106092366A true CN106092366A (en) | 2016-11-09 |
| CN106092366B CN106092366B (en) | 2019-04-12 |
Family
ID=57230973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610363068.5A Active CN106092366B (en) | 2016-05-27 | 2016-05-27 | A kind of carbon brush monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106092366B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148021A (en) * | 2023-10-30 | 2023-12-01 | 华能新能源股份有限公司山西分公司 | Wind-powered electricity generation sliding ring brush testing arrangement |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1865876A (en) * | 2005-11-21 | 2006-11-22 | 天津爱天光电子科技有限公司 | Fiber-optic grating sensor and fiber-optic grating detection device having same |
| CN204405054U (en) * | 2015-02-10 | 2015-06-17 | 中国地震局第一监测中心 | Based on the multi-path static level device of fiber-optic grating sensor |
| CN205580621U (en) * | 2016-03-29 | 2016-09-14 | 浦峰 | Carbon brush monitoring system |
-
2016
- 2016-05-27 CN CN201610363068.5A patent/CN106092366B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1865876A (en) * | 2005-11-21 | 2006-11-22 | 天津爱天光电子科技有限公司 | Fiber-optic grating sensor and fiber-optic grating detection device having same |
| CN204405054U (en) * | 2015-02-10 | 2015-06-17 | 中国地震局第一监测中心 | Based on the multi-path static level device of fiber-optic grating sensor |
| CN205580621U (en) * | 2016-03-29 | 2016-09-14 | 浦峰 | Carbon brush monitoring system |
Non-Patent Citations (2)
| Title |
|---|
| 卢婧 等: "基于F-P 标准具和Music算法的FBG动态应变传感系统", 《光电工程》 * |
| 江毅 等: "《光纤FABRY-PEROT干涉仪原理及应用》", 30 April 2009 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148021A (en) * | 2023-10-30 | 2023-12-01 | 华能新能源股份有限公司山西分公司 | Wind-powered electricity generation sliding ring brush testing arrangement |
| CN117148021B (en) * | 2023-10-30 | 2024-01-02 | 华能新能源股份有限公司山西分公司 | Wind-powered electricity generation sliding ring brush testing arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106092366B (en) | 2019-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207850562U (en) | Multifunctional optical fiber distributed on line monitoring equipment | |
| CN1844941B (en) | A photoelectric integrated strong electric field measurement system | |
| CN103207162B (en) | Cable tunnel multiple gases concentration online monitoring system based on Fibre Optical Sensor | |
| CN203163769U (en) | Overhead line safety monitoring system based on distributed fiber sensors | |
| CN101701859B (en) | Fiber grating monitoring system for power transmission line | |
| CN201707750U (en) | Gaseous spectrum absorption box and temperature control grating and combined fiber grating fire hazard warning system | |
| CN107817743A (en) | A kind of bridge security online monitoring system | |
| CN103591971A (en) | Positioning method and system of fiber grating | |
| CN202141770U (en) | Cable carrying capacity calculation and early warning system based on distributed optical fiber temperature measurement | |
| CN202511922U (en) | Oppc optical cable stress and carrying capacity measuring and calculating system | |
| CN206930377U (en) | Based on narrow band laser demodulating fiber bragg grating temp measuring system | |
| CN201903411U (en) | Power equipment temperature online monitoring system based on fiber bragg grating temperature sensor | |
| CN206974448U (en) | The joint Raman of both-end detection and the distribution type optical fiber sensing equipment of Brillouin scattering | |
| CN205002952U (en) | Testing arrangement of two -way loss of optic fibre with pronunciation communication function | |
| CN106092366A (en) | A kind of carbon brush monitoring system | |
| CN207300447U (en) | Bridge security monitoring device based on optical fiber sensing technology | |
| CN207866359U (en) | A kind of overhead transmission line Vibration Condition Monitoring device | |
| CN110375791A (en) | Bridge security monitoring method based on optical fiber sensing technology | |
| CN205580621U (en) | Carbon brush monitoring system | |
| Jie et al. | A new packaged FBG sensor for underground cable temperature monitoring | |
| CN111307196A (en) | A radiation-resistant method and system for distributed electrothermal annealing and photothermal annealing | |
| CN209085812U (en) | A kind of unidirectional strain transducer of fiber grating | |
| CN203337286U (en) | Optical-fiber on-line temperature measuring system dedicated for electric power contacts | |
| CN107631796B (en) | A kind of fibre optic rediation monitoring device and monitoring method | |
| CN205506256U (en) | Insulator for station cable temperature measurement system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |