CN106092366B - A kind of carbon brush monitoring system - Google Patents
A kind of carbon brush monitoring system Download PDFInfo
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- CN106092366B CN106092366B CN201610363068.5A CN201610363068A CN106092366B CN 106092366 B CN106092366 B CN 106092366B CN 201610363068 A CN201610363068 A CN 201610363068A CN 106092366 B CN106092366 B CN 106092366B
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- 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
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- General Physics & Mathematics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
It further include the light source unit and conversion unit being connected with monitoring unit, and the processing unit being connected with conversion unit including the monitoring unit for monitoring carbon brush state the invention discloses a kind of carbon brush monitoring system；The light source unit provides light as exciting signal source for the monitoring unit；The monitoring unit can variation with temperature and induction variation is occurred to the light wave of the light of injection, and by the optical signal feedback to the conversion unit；The optical signal that monitoring unit feedback is come is converted corresponding electric signal by the conversion unit；The processing unit calculates the electric signal of acquisition, is handled, and the real time on-line monitoring to carbon brush temperature is completed.The present invention can be avoided the mode of artificial inspection, reduces human cost, economizes on resources, and can effectively avoid the security risk during manual inspection.
Description
Technical field
The invention belongs to generator-temperature detection monitoring technology field, the carbon brush of especially a kind of generator monitors system.
Background technique
Carbon brush and slip ring are the equipment of generator sound contact and positive energy exchange, are the important compositions of generator excited system
Part.But occurs superheating phenomenon often due to a lot of reasons in operation, seriously jeopardize the safe operation of generator.In order to protect
Unit safety stable operation is demonstrate,proved, there are strict requirements for maintenance of the power plant to specification carbon brush, and carbon brush thermometric is in carbon brush daily maintenance
Very important one, generally by infrared thermometer periodic measurement carbon brush temperature, due to carbon brush equipment working environment by
The various factors such as dust influence, and infrared thermometer can not often obtain reliable temperature data, and monitoring time interval is longer,
It cannot achieve real time on-line monitoring, can not find failure in real time.
Carbon brush normal operating temperature is usually 50 DEG C~80 DEG C (being higher by 40 DEG C or so than environment temperature), carbon brush current distribution
Whole relatively to balance, every block of carbon brush operating current is in 20-100A.Brush spring pressure is relatively uniform, and carbon brush activity is freely and nothing
Shake bite phenomenon.The heat generated in carbon brush and current collection inscription of loop is taken away by ventilating system, i.e. fever is basically reached with heat dissipation
Balance.Under normal operating condition, when load increases electric current increase or individual carbon brush operating conditions are deteriorated, temperature has micro increasing in short-term
Add, system is able to maintain that balance or reaches new equilibrium state.But if carbon brush shortens, brush spring pressure becomes smaller, contacts
Resistance becomes larger, carbon brush operating condition is deteriorated, and when operating current increase, temperature change, the balanced capacity of system is reduced, part carbon
Brush temperature will increase, and so as to cause the raising of whole system temperature, even up to be unable to control state sometimes.Adstante febre carbon brush sum aggregate
Electric circumstance temperature degree is up to 100 DEG C or more, and up to 200 DEG C even in the worst case -- 300 DEG C.At this time carbon brush working condition worse and worse, carbon brush
Current distribution is very uneven, and a small number of carbon brush electric currents reach 300A, and other carbon brush electric currents are close to 0.A large amount of carbon brush occur not
Normal bounce or bite, and there is a large amount of spark, pigtail is blown or taken off to shunt welding；Carbon brush and the change of tune of collector ring grating obtain sharply
It is ear-piercing, until causing collector ring ring fire.
Carbon brush thermometric mainly has at present: (1) temperature of carbon brush is measured by regularly tours of inspection；(2) pass through infrared ray
Temperature measurement on-line mode is realized；(3) it is realized by electric transducer temperature measurement on-line mode.Traditional several method at present, to carbon brush into
Trip temperature monitoring can not all accomplish that 100% is reliable, especially for the unit of carbon brush high failure rate, it is non-to thereby result in unit
Planned outage stops, and causes undesirable influence to system, while also bringing along undesirable economic loss to power plant.Artificial regular visit
A large amount of human and material resources are expended, artificial periodical inspection cannot find the failure restored automatically in the short time, cannot early send out in time
Existing, the elimination potential security risk of equipment.Meanwhile site environment is complicated, infrared measurement of temperature error is big；And traditional electric transducer needs
It to power to sensor, secondary failure can be caused because of temp measuring system itself, cause bigger loss
Summary of the invention
The purpose of this section is to summarize some aspects of the embodiment of the present invention and briefly introduce some preferable implementations
Example.It may do a little simplified or be omitted to avoid our department is made in this section and the description of the application and the title of the invention
Point, the purpose of abstract of description and denomination of invention it is fuzzy, and this simplification or omit and cannot be used for limiting the scope of the invention.
The problem of monitoring system in view of above-mentioned and/or existing carbon brush, proposes the present invention.
Therefore, the purpose of the present invention is to provide a kind of carbon brush of engine to monitor system, can be avoided artificial inspection
Mode, reduce human cost, economize on resources, and can effectively avoid the security risk during manual inspection.
In order to solve the above technical problems, the invention provides the following technical scheme: a kind of carbon brush monitors system, including for supervising
The monitoring unit of carbon determination brush state further includes the light source unit and conversion unit being connected with monitoring unit, and single with conversion
The processing unit that member is connected；The light source unit provides light as exciting signal source for the monitoring unit；The monitoring
Unit can variation with temperature and induction variation is occurred to the light wave of the light of injection, and by the optical signal feedback to described turn
Change unit comprising front end sensing optic cable, the front end sensing optic cable include the variable fiber grating temperature sensor of spacing, institute
It states fiber grating temperature sensor to change by its effective refractive index and screen periods when ambient temperature changes, thus lead
The reflection wavelength of fiber grating is caused to move, to detect the temperature parameters of carbon brush；The conversion unit is by the monitoring unit
The optical signal that feedback is come is converted into corresponding electric signal；The processing unit calculates the electric signal of acquisition, is handled, complete
The real time on-line monitoring of pairs of carbon brush temperature.
A kind of preferred embodiment as carbon brush of the present invention monitoring system, in which: the conversion unit includes detection
Device module, the two ways of optical signals of forward-propagating and backpropagation in receiving front-end sensing optic cable, and convert optical signals to electricity
Signal.
A kind of preferred embodiment as carbon brush of the present invention monitoring system, in which: the back wave of the fiber grating
Length moves, the relationship with temperature change are as follows: △ 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 relationship；Pe is the elasto-optical coefficient of optical fiber；
αsubThermal expansion coefficient for the base material mutually pasted with the fiber grating.
A kind of preferred embodiment as carbon brush of the present invention monitoring system, in which: the light source unit includes adjustable
Humorous light source module comprising ASE light source, fibre optic isolater, fixed optical attenuator and tunable TEA CO2 laser, ASE light source issue
Light by fixed optical attenuator so that the light for being input to tunable TEA CO2 laser meets the limitation requirement of its entrance power,
Direction of the fibre optic isolater to guarantee optic path between ASE light source and tunable TEA CO2 laser.
A kind of preferred embodiment as carbon brush of the present invention monitoring system, in which: the conversion unit, processing unit
And light source unit is arranged in equipment rack, and the monitoring unit is connected with the carbon brush, passes through light each other
Cable connection.
A kind of preferred embodiment as carbon brush of the present invention monitoring system, in which: the monitoring unit is set with described
It is provided with connection unit on optical cable between standby host frame, to connect the optical cable extended from the monitoring unit and set with described
The optical cable that standby host frame is connected.
A kind of preferred embodiment as carbon brush of the present invention monitoring system, in which: the connection unit includes flange
Disk and connector, convenient for the connection and demolition and maintenance between optical cable.
A kind of preferred embodiment as carbon brush of the present invention monitoring system, in which: the base material is that polyamides is sub-
Amine.
Beneficial effects of the present invention: the carbon brush of offer of the invention monitors system, can the round-the-clock state to carbon brush into
Row monitoring, provides for power supply monitoring center and accurately judges reference data, it is ensured that power supply system stable operation；And it can be avoided
The mode of artificial inspection reduces human cost, economizes on resources, and can effectively avoid the safety wind during manual inspection
Danger.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is a kind of schematic illustration of carbon brush monitoring system described in one embodiment of the invention；
Fig. 2 is the structural schematic diagram that a kind of carbon brush of embodiment illustrated in fig. 1 of the present invention monitors system；
Fig. 3 is the structural schematic diagram of connection unit described in embodiment illustrated in fig. 1 of the present invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, right with reference to the accompanying drawings of the specification
A specific embodiment of the invention is described in detail.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, 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 the specific embodiments disclosed below.
Secondly, " one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one realization side of the invention
A particular feature, structure, or characteristic in formula." in one embodiment " that different places occur in the present specification not refers both to
The same embodiment, nor the individual or selective embodiment mutually exclusive with other embodiments.
As shown in Figure 1, Fig. 1 shows a kind of schematic illustration of carbon brush monitoring system.The carbon brush Application of Monitoring System in
On generator carbon brush, the monitoring to carbon brush temperature is realized.Carbon brush in this embodiment monitors system comprising for monitoring
The monitoring unit 100 of carbon brush state, the light source unit 400 and conversion unit 200 being connected with monitoring unit 100, and with conversion
The processing unit 300 that unit 200 is connected.Aforementioned four unit its each other be connected by optical cable, wherein light source unit
400 provide light as exciting signal source for monitoring unit 100；Monitoring unit 100 can variation with temperature and to injection
Induction variation occurs for the light wave of light, and by the optical signal feedback to conversion unit 200；Conversion unit 200 is by monitoring unit 100
The optical signal that feedback is come is converted into corresponding electric signal；The electric signal of 300 pairs of processing unit acquisitions is calculated, is handled, complete
The real time on-line monitoring of pairs of carbon brush temperature.
In this embodiment, monitoring unit 100 includes front end sensing optic cable, and front end sensing optic cable includes that spacing is variable
Fiber grating temperature sensor, to detect the temperature parameters of carbon brush.Fiber grating temperature sensor passes through its effective refractive index
It changes with screen periods when ambient temperature changes, causes the reflection wavelength of fiber grating to move, thus to detect
The temperature parameters of carbon brush.
The effective refractive index and screen periods of fiber grating can change when ambient temperature changes, and thus lead to optical fiber
The reflection wavelength of grating moves.The reason of optical fiber Bragg raster central wavelength caused by temperature is drifted about mainly includes two sides
Face: optical fiber thermo-optic effect and thermal expansion effects.The movement of fiber grating reflection wavelength and the relationship of temperature change may be expressed as:
In formula: ζ=1/neff=△ neff/ △ T is the thermo-optical coeffecient of optical fiber, describes optical fibre refractivity variation with temperature
Relationship；αs=1 △ λ/λ △ T is the thermal expansion coefficient of optical fiber, describes the pitch variation with temperature relationship of grating.It can from formula
To find out △ λsIt is in a linear relationship between △ T, by measuring the mobile △ λ g of fiber grating reflection wavelength, it can determine ring
Border temperature.Due to the temperature coefficient very little of fiber grating, it is not high that sensing element its sensitivity individually is done with it, in order to improve temperature
Fiber grating can be pasted on the biggish base material of thermal expansion coefficient by sensitivity.If the thermal expansion coefficient of base material is
αsub, and meet αsub" α, then there is given below fiber grating reflection wavelength variation with temperature relationship after pasting: △ λ g/ λ g=
[ζs+(1-Pe)αsub] △ T, in formula: ζs=1/neff=△ neff/ △ T be optical fiber thermo-optical coeffecient, description optical fibre refractivity with
The variation relation of temperature；Pe is the elasto-optical coefficient of optical fiber；αsubThermal expansion for the base material mutually pasted with the fiber grating
Coefficient.It is from formula it can be seen that in a linear relationship between △ λ g and △ T, by measuring the movement of fiber grating reflection wavelength, just
It can determine environment temperature.
Currently, there are two ways to FBG encapsulation is the most frequently used:
1, FBG is affixed directly on base material, and typically patch encapsulates, and this method is will using high temperature resistant organic gel
FBG is packaged on beryllium-bronze base material, and the linear expansion coefficient ratio FBG's of base material is big, to improve its temperature sensitivity.
2, using mold or tubing encapsulating, typically capillary tubing is encapsulated, and this method is to cover capillary tubing in FBG
On, then intermediate encapsulating modification acrylate puts people's baking oven and further dries, solidifies.
The advantages of method 2 is to improve its temperature sensitivity coefficient while not changing FBG ga(u)ge factor；It lacks
Point is the envelope filling for being unfavorable for modification acrylate since the diameter of capillary tubing is too small.The shortcomings that packaging method 1 is to will cause
The line expansion of FBG is uneven, therefore both packaging methods are all less desirable.In order to make up the deficiency of the above method, we
It is improved in terms of encapsulating structure, encapsulating material and encapsulation binder, to obtain more preferably packaging effect.
In the present embodiment, inventor has developed the novel encapsulation technology with international advanced technology.Firstly, nonmetallic
Polyimide substrate material be made into groove shapes, secondly, with the polyimide adhesive of vacuum is exhausted by optical fiber Bragg grating encapsulation
In grooved substrate, this method ensure that adhesive and base material can be with when being changed by ambient temperature is influenced for sensor
The expansion for keeping degree of the same race, the line expansion for greatly reducing FBG are uneven, it is ensured that sensor reliability and stability.Most
Afterwards, then with glass sock pipe sleeve outside sensor, AB glue seals both ends, does so the safety that both ensure that sensor, also subtracts
The problem of having lacked the cross sensitivity of stress and temperature.
Encapsulate design parameter:
That is, the fiber grating temperature sensor of specific customization is mounted on carbon brush by carbon brush monitoring system, optical fiber light
Grid temperature sensor after light source unit 400 is incident as exciting signal source, by conversion unit 200 detect its reflection or
The optical signal transmitted is allowed to be converted into corresponding electric signal, and transformation result is transferred in processing unit 300, passes through processing
The signal of 300 pairs of unit acquisitions is calculated, is handled, and carbon brush temperature real time on-line monitoring is finally completed.
Specifically, light source unit 400 includes tunable optical source module comprising ASE light source (i.e. amplified spontaneous emission light
Source), fibre optic isolater, fixed optical attenuator and tunable TEA CO2 laser (Fabry-Perot filter), what ASE light source issued
Light is by fixed optical attenuator, so that the light for being input to tunable TEA CO2 laser meets the limitation requirement of its entrance power, ASE
Direction of the fibre optic isolater to guarantee optic path between light source and tunable TEA CO2 laser.Fibre optic isolater can be protected
The unidirectional operation for demonstrate,proving light, prevents backlight from damaging other devices.At this point, because temperature signal loads in reflecting light,
It by the transmitting of reflected light, is collected by monitoring unit 100, finally by methods such as demodulation, extracts required temperature information.Cause
This, carbon brush monitoring system must have stable light source unit 400, monitor system for entire carbon brush and provide carrier wave optical signal.Light source
The above-mentioned component of unit 400 possesses adjustment mechanism, regulating optical power, raising detection accuracy can protect simultaneously according to the actual situation
Card system safety.
In another embodiment, light source unit 400 includes outside tunable optical source module, further includes 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 filter), the light that ASE light source issues passes through fixation
Optical attenuator so that the light for being input to tunable TEA CO2 laser meets the limitation requirement of its entrance power, ASE light source with it is adjustable
Direction of the fibre optic isolater to guarantee optic path between humorous F-P filter.Fibre optic isolater can guarantee the unidirectional of light
Operation, prevents backlight from damaging other devices.At this point, passing through reflected light because temperature signal loads in reflecting light
Transmitting, collected by monitoring unit 100, finally by demodulation etc. methods, extract required temperature information.Therefore, carbon brush is supervised
Examining system must have stable light source unit 400, monitor system for entire carbon brush and provide carrier wave optical signal.Light source unit 400
Above-mentioned component possesses adjustment mechanism, can regulating optical power according to the actual situation, improve detection accuracy, while guaranteeing that system is pacified
Entirely.But since initial optical signal is in transmission process, signal can change, and wavelength rectification module is by Wavelength calibration, at this point, will
Tunable TEA CO2 laser obtains the sampled point of spectrum electric signal and wavelength corresponds, and is tunable F-P light filter non-linear
Calibration provides reference wavelength.Wavelength rectification module can increase substantially wavelength positioning accuracy, reduce since filter is non-linear
Bring error plays calibration to tunable light filter non-linear.After the module, it can complete what high-precision demodulated
As a result.
Preferably, wavelength rectification module is made of F-P etalon and PIN detector.A part output of light source unit 400
Light distributes to fiber F-P etalon, converts voltage analog for the optical signal that fiber F-P etalon exports by conversion unit 200
Signal, and it is input to capture card, the spectrogram of fiber F-P etalon is obtained by acquisition card control scanning frame, through the processing unit
300 carry out algorithm process, the sampled point that spectrum electric signal is obtained by tunable TEA CO2 laser and wavelength are corresponded, being can
Tuned light wave filter nonlinear calibration provides reference wavelength, to be corrected to tunable optical source output wavelength.Significantly mention
High wavelength positioning accuracy is reduced due to the non-linear bring error of filter, is demarcated to tunable TEA CO2 laser non-linear
Effect.
Conversion unit 200 includes detector module, the two of forward-propagating and backpropagation in receiving front-end sensing optic cable
Road optical signal, and convert optical signals to electric signal.The working principle of conversion unit 200 is based on photoelectric effect.Photoelectric effect is
An important phenomenon in physics, metal surface is under light effect of irradiation, as long as the frequency of light is more than a certain limiting frequency, by
The metal surface Electron absorption photon energy of light irradiation is excited, will launching electronics, i.e. photoelectric effect.Add one outside metal
A closed circuit, in addition positive power supply, the photoelectron of these evolutions all arrive at anode and just form so-called photoelectric current, and then complete
At the conversion of light energy to electric energy.
Collected optical signal is converted voltage analog signal by detector module, and conversion unit 200 utilizes the electricity inputted
Analog signal is pressed, analog or digital signal is exported to control tunable TEA CO2 laser and is finally returned to processing unit 300, it is complete
At last data processing work.
It is noted herein that: it further includes voltage cell (not shown) that carbon brush, which monitors system, for in system
Other units provide operating voltage.The operating voltage of each unit is not provided by national standard power supply system in system
220V, it is therefore desirable to there is transformation system to realize the conversion of voltage.Voltage cell, can using external 220V power supply as input source
The multiple voltages such as+5V ,+12V and+48V are exported simultaneously, guarantee the work requirements of each unit.
Referring to figs. 2 and 3, conversion unit 200, processing unit 300 and light source unit 400 are all arranged in equipment rack
In 500, and monitoring unit 100 is connected with carbon brush, is connected each other by optical cable.Monitoring unit 100 and equipment rack
Connection unit 600 is additionally provided on optical cable between 500, to connect the optical cable extended from monitoring unit 100 and and equipment
The optical cable that rack 500 is connected.
When generator maintenance, equipment rack 500 may integrally hang away maintenance, therefore install one in wind-tunnel Position Design
Connection unit 600 as equipment (conversion unit 200, processing unit 300 and light source unit 400 etc.) in equipment rack 500 and
The burble point of rear end equipment (monitoring unit 100 etc.).Before equipment rack 500 needs whole hang away, it is thus only necessary to which connection is single
Separation can be realized in the extraction of optical connector 602 in member 600.Connection unit 600 is as shown in figure 3, connection unit 600 includes flange
Disk 601 and connector 602, convenient for the connection and demolition and maintenance between optical cable.
As described above, offer of the invention carbon brush monitor system, can the round-the-clock state to carbon brush be monitored, be
Power plant monitoring and control center, which provides, accurately judges reference data, it is ensured that electricity generation system stable operation；And it can be avoided artificial patrol
The mode of inspection reduces human cost, economizes on resources, and can effectively avoid the security risk during manual inspection.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferable
Embodiment describes the invention in detail, those skilled in the art should understand that, it can be to technology of the invention
Scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered in this hair
In bright scope of the claims.
Claims (3)
1. a kind of carbon brush monitors system, including the monitoring unit (100) for monitoring carbon brush state, it is characterised in that: further include
The light source unit (400) and conversion unit (200) being connected with monitoring unit (100), and be connected with conversion unit (200)
Processing unit (300)；
The light source unit (400) is that the monitoring unit (100) provide light as exciting signal source；And the light source unit
400 further include wavelength rectification module, and the wavelength rectification module is tunable F-P light filter non-linear mark by Wavelength calibration
Reference wavelength is provided surely；
The monitoring unit (100) can variation with temperature and induction variation is occurred to the light wave of the light of injection, and should
Optical signal feedback is to the conversion unit (200) comprising front end sensing optic cable, the front end sensing optic cable include that spacing is variable
Fiber grating temperature sensor, the fiber grating temperature sensor is by its effective refractive index and screen periods in extraneous temperature
Degree changes when changing, and causes the reflection wavelength of fiber grating to move, thus to detect the temperature parameters of carbon brush；
It further include the base material mutually pasted with the fiber grating, if the thermal expansion coefficient of the base material is αsub, and it is full
Sufficient αsub" α, wherein α is the thermal expansion coefficient of optical fiber, then fiber grating reflection wavelength variation with temperature relationship is under after pasting
Formula provides: Δ λ g/ λ g=[ζs+(l-Pe)asub] Δ T, in formula: ζs=1/neff=Δ neff/ Δ T is the thermo-optical coeffecient of optical fiber,
Optical fibre refractivity variation with temperature relationship is described；Pe is the elasto-optical coefficient of optical fiber；αsubIt is mutually pasted with the fiber grating
The thermal expansion coefficient of base material, it is from formula it can be seen that in a linear relationship between Δ λ g and Δ T, it is anti-by measurement fiber grating
The long movement of ejected wave, can determine environment temperature；
The base material is polyimides, and the polyimides is described using a kind of packaging method and the optical fiber Bragg grating encapsulation
Packaging method further include: firstly, nonmetallic polyimide substrate material is made into groove shapes；Secondly, with vacuum is exhausted
Polyimide adhesive by optical fiber Bragg grating encapsulation in grooved substrate, this method ensure that sensor changes by ambient temperature
Influence when adhesive and base material can keep the expansion of degree of the same race, the line expansion for greatly reducing FBG is uneven, really
Sensor reliability and stability are protected；Finally, AB glue seals both ends, both guarantees again with glass sock pipe sleeve outside sensor
The safety of sensor, the problem of decreasing the cross sensitivity of stress and temperature；
The optical signal that the monitoring unit (100) feedback is come is converted corresponding electric signal by the conversion unit (200)；
The processing unit (300) calculates the electric signal of acquisition, is handled, and completes to supervise the real-time online of carbon brush temperature
It surveys；
The conversion unit (200), processing unit (300) and light source unit (400) setting are interior in equipment rack (500), and
The monitoring unit (100) is connected with the carbon brush, is connected each other by optical cable；The monitoring unit (100) with
Connection unit (600) are provided on optical cable between the equipment rack (500), to connect from the monitoring unit (100)
The optical cable extended and the optical cable being connected with the equipment rack (500)；And the connection unit (600) includes ring flange
(601) and connector (602), convenient for the connection and demolition and maintenance between optical cable.
2. carbon brush as described in claim 1 monitors system, it is characterised in that: the conversion unit (200) includes detector mould
Block, the two ways of optical signals of forward-propagating and backpropagation in receiving front-end sensing optic cable, and convert optical signals to electric signal.
3. carbon brush as claimed in claim 1 or 2 monitors system, it is characterised in that: the light source unit (400) includes tunable
Light source module comprising ASE light source, fibre optic isolater, fixed optical attenuator and tunable TEA CO2 laser, what ASE light source issued
Light is by fixed optical attenuator, so that the light for being input to tunable TEA CO2 laser meets the limitation requirement of its entrance power, ASE
Direction of the fibre optic isolater to guarantee optic path between light source and tunable TEA CO2 laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610363068.5A CN106092366B (en) | 2016-05-27 | 2016-05-27 | A kind of carbon brush monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610363068.5A CN106092366B (en) | 2016-05-27 | 2016-05-27 | A kind of carbon brush monitoring system |
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| CN106092366B true CN106092366B (en) | 2019-04-12 |
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| 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 |
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 |
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