CN108318248A - Bearing state on-line monitoring system based on optical fiber vibration sensing and method - Google Patents
Bearing state on-line monitoring system based on optical fiber vibration sensing and method Download PDFInfo
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- CN108318248A CN108318248A CN201710032443.2A CN201710032443A CN108318248A CN 108318248 A CN108318248 A CN 108318248A CN 201710032443 A CN201710032443 A CN 201710032443A CN 108318248 A CN108318248 A CN 108318248A
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- sensing optical
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
Abstract
The present invention provides bearing state on-line monitoring system and method based on optical fiber vibration sensing.Laser generator is used to send out pulse laser to circulator, light scanning apparatus is used to the pulse laser from circulator being sequentially input to more vibrating sensing optical cables, every vibrating sensing optical cable in more vibrating sensing optical cables is used to sense the vibration of one or more bearings, come from more vibrating sensing optical cable transmissions, scattered light signal with bear vibration information is input to photodetector through light scanning apparatus and circulator, the scattered light signal is converted to electric signal and by the electric signal transmission to signal acquisition and processing module by photodetector, signal acquisition and processing module are for handling the electric signal, and the working condition of bearing is determined by the electric signal.More vibrating sensing optical cables are formed as parallel relationship.The length of every vibrating sensing optical cable can be shortened, improve the sensitivity of monitoring system, reduce the cost of monitoring system.
Description
Technical field
The invention belongs to bearing state on-line monitoring technique field, specifically a kind of intelligent shaft based on optical fiber vibration sensing
State on_line monitoring system and method is held, which can be to be realized with a low cost the status monitoring of a large amount of bearings.
Background technology
Bearing state on-line monitoring system based on temperature sensing can be different to detect by monitoring bearing operating temperatures variation
Normal situation, because when bearing fault, abrasion is drastically accelerated, and operating temperature also can be increased accordingly.
The amplitude versus frequency characte for having benefited from the vibration signal that the vibrating sensors such as accelerometer detect, the axis based on vibrating sensing
Unusual condition can be detected but also can effectively judge failure type by holding state on_line monitoring system not only.By will be from vibration
The feature vector extracted in signal compares the pattern-recognition that bearing fault type can be achieved with failure mode data library.
Optical fiber sensing technology provides a kind of new vibration detecting solution.Under the effect of Rayleigh effect, due to optical fiber
The spatial distribution randomness of interior atoms or molecule rises and falls, and the laser transmitted in optical fiber will produce scattering light backward.Work as environment
When middle presence vibration, vibration can cause optical fiber to generate ess-strain, and the scattered light signal transmitted backward is caused correspondingly to become
Change.Therefore whole optical fiber can transmit laser but also be used as vibrating sensor.This advantage of optical fiber sensing technology makes it very
It is suitble to while monitors multiple bearings.
The existing technical solution based on temperature sensing, each bearing need at least one comprising transducing part, power supply unit
Divide the temperature sensing unit with communications portion, and the quantity of system monitoring bearing is limited by circuit signal processing capacity.Institute
With just needed if monitoring multiple bearings cover on-line monitoring systems, cost is very high and waste of resource.In addition, based on temperature
The technical solution of degree sensing can not judge specific failure type.
The existing vibrating sensing technical solution based on accelerometer, equally exists each bearing and at least needs a set of vibration
The problem of sensing unit and bearing monitoring quantity are limited by circuit signal processing capacity.
Although optical fiber vibration sensing technology can solve to be based on temperature in a manner of by the multiple bearings of fiber-optic monitoring
In sensing and accelerometer sensing technology scheme the problem of the wasting of resources, but its cost is still very high.It will be readily understood that
The quantity of monitoring bearing means that vibrating sensing optical fiber is longer.And because the intensity of Rayleigh scattering optical signal is the same as laser
Power positive correlation, so long vibrating sensing optical fiber just needs powerful laser.Meanwhile laser is gone back in optical fiber transmission process
It can be lost.It is increased at present by using powerful laser and power amplifier to improve the scheme of detection range
System cost is added.
Invention content
The predominantly fatigue failure of the reason of the shortcomings that in view of the above-mentioned prior art, the present invention is based on most bearing failures, because
This cognition of less demanding to the renewal speed of monitoring data of this bearing condition monitoring system and one kind is provided and can be monitored simultaneously
The bearing state on-line monitoring system and method based on optical fiber vibration sensing of the low cost of the state of multiple bearings.
The present invention may be used but be not limited to following proposal.
A kind of bearing state on-line monitoring system based on optical fiber vibration sensing, the monitoring system include that laser generates dress
Set, circulator, light scanning apparatus, more vibrating sensing optical cables, photodetector and signal acquisition and processing module,
The laser generator is used to send out pulse laser,
The pulse laser generated by the laser generator enters the light scanning apparatus by the circulator,
The light scanning apparatus is used to the pulse laser being sequentially input to the more vibrating sensing optical cables,
Every vibrating sensing optical cable in the more vibrating sensing optical cables is used to sense shaking for one or more bearings
Dynamic, scattered light signal come from the more vibrating sensing optical cable transmissions, with bear vibration information is via the optical scanning
Device and the circulator enter the photodetector,
The photodetector is used to the scattered light signal being converted to electric signal, and by the electric signal transmission to described
Signal acquisition and processing module,
The signal acquisition and processing module are used for from being carried out from the electric signal that photodetector transmission comes
It manages, and determines the working condition of bearing by the electric signal.
Preferably, the laser generator includes laser and pulse-modulator, the laser generated by the laser
The light scanning apparatus is entered by the circulator after being modulated by the pulse-modulator.
Preferably, the end far from the light scanning apparatus of the more vibrating sensing optical cables is respectively connected with attenuator,
The pulse laser that the attenuator is used to make to transmit in the vibrating sensing optical cable is decayed.It shakes this way it is possible to avoid being transmitted to
The laser of the end of dynamic sensing optic cable generates the reflected light (towards light scanning apparatus) backward, improves the detection essence of scattered light signal
Degree.
Preferably, the monitoring system further includes bearing fault pattern database, and the signal acquisition and processing module will
Its obtained electric signal is compared with the data in the bearing fault pattern database, to determine the working condition of bearing
And/or failure type.
Preferably, the light scanning apparatus includes speculum, motor and multiple laser couplers, from the circulator
Pulse laser is incident on the speculum, and the motor makes the speculum move and be reflected into the pulse laser described more
In selected laser couplers in a laser couplers, the multiple laser couplers respectively with the more vibrating sensing light
Cable connects, to make the pulse laser be incident in corresponding vibrating sensing optical cable.
Preferably, the light scanning apparatus includes two parallel speculums and fixed plate, described two parallel reflections
Mirror is installed on the fixed plate, and the fixed plate is installed on the main shaft of the motor, the end face of described two parallel speculums
Not in same plane, the symmetrical centre of described two parallel speculums is on the main-shaft axis of the motor.
Preferably, the vibrating sensing optical cable includes the hanging transducing part of fibre core and solid transmission section, described
On the length direction of vibrating sensing optical cable, the transmission section and the transducing part are alternately arranged, and the transducing part is used for
It is installed to bearing, with the vibration of sensing bearing, the transmission section is used for transmission the pulse laser and the scattering light.
Preferably, the transducing part of the vibrating sensing optical cable is wound on the circumferential recess of the flange of the end cap of shaft end
In, the transmission section of the vibrating sensing optical cable is fixed, and the flange of the end cap of the bearing is resisted against the outer of bearing
Circle, with the vibration of receiving bearing.
Preferably, the multiple bearings for needing to monitor are partially disposed in outside the vibrating sensing optical cable of the monitoring system
Centre position.
A kind of bearing state on-line monitoring method based on optical fiber vibration sensing, the monitoring method include the following steps：
Send out pulse laser；
The pulse laser is sequentially input in more vibrating sensing optical cables, wherein every vibrating sensing optical cable is equal
One or more bearings are connected to, with the vibration of sensing bearing；
Come from the more vibrating sensing optical cable transmissions, scattered light signal with bear vibration information is converted into electricity
Signal, and the electric signal is handled, and the working condition of bearing is determined by the electric signal.
The monitoring method can be realized using monitoring system according to the present invention.
In the bearing state on-line monitoring system based on optical fiber vibration sensing of the present invention and method, light scanning apparatus is used
In the pulse laser from laser generator is sequentially input to more vibrating sensing optical cables.Therefore, more vibrating sensings
Optical cable is formed as parallel relationship.Every vibration can be shortened in the case where not reducing the quantity for the bearing that can be monitored in total
The length of sensing optic cable.It is thereby possible to reduce the power of the laser transmitted in vibrating sensing optical cable or in lower laser work(
Preferable sensitivity is obtained under conditions of rate.In this application, due to shortening the length of every vibrating sensing optical cable,
Low power laser can be used and/or omit power amplifier, thus the cost of monitoring system can be reduced.
Description of the drawings
Fig. 1 is the bearing state on-line monitoring system based on optical fiber vibration sensing according to an embodiment of the invention
Structural schematic diagram.
Fig. 2 is the structural schematic diagram of the light scanning apparatus in the monitoring system of Fig. 1.
Fig. 3 is the fundamental diagram of the light scanning apparatus of Fig. 2.
Fig. 4 is the axial sectional diagrammatical view illustration of the vibrating sensing optical cable in the monitoring system of Fig. 1.
Fig. 5 is installed on a kind of schematic diagram of mounting means of bearing for the vibrating sensing optical cable in the monitoring system of Fig. 1.
Reference numerals list
1 laser, 2 pulse-modulators, 3 circulators, 4 light scanning apparatus, 5 vibrating sensing optical cables, 6 bearings, 7 attenuators, 8
Photodetector, 9 signal acquisitions and processing module, 10 power modules, 401A, 401B, 401A ', 401B ' speculums, 402 fix
Plate, 403 motors, 404A, 404B, 404C laser couplers, 101 incident lasers, 102,102 ' shoot lasers, 405 symmetrical centres,
501 transmission sections, 502 transducing parts, 503 fibre cores, 504 protective cases, 505 coverings, 601 end caps, 602 Circular Plates, 603 flanges,
604 circumferential recess
Specific implementation mode
Referring to Fig.1, the bearing state on-line monitoring system based on optical fiber vibration sensing of an embodiment of the invention
(hereinafter, being also referred to as " monitoring system " sometimes) includes laser 1, pulse-modulator 2, circulator 3, light scanning apparatus 4, vibration
Sensing optic cable 5, attenuator 7, photodetector 8, signal acquisition and processing module 9 and power module 10.
The laser that laser 1 generates is pulse modulation after device 2 is modulated to pulse laser, passes through circulator 3 and optical scanning device
The vibrating sensing optical cable 5 that 4 enter in more (n roots) vibrating sensing optical cables 5 is set to detect multiple (m) bearings 6 work feelings
Vibration under condition.The vibration of bearing 6 can cause the variation of fiber stress in vibrating sensing optical cable 5, so as to cause Rayleigh scattering light
Signal accordingly changes.Rayleigh scattering optical signal with bear vibration information is backward (that is, to the side opposite with laser direction of advance
To) received by photodetector 8 after light scanning apparatus 4 and circulator 3, it is changed into after electric signal by signal acquisition and processing
The processing of module 9.The laser of onwards transmission eventually enters into attenuator 7 and is attenuated.
Because distance of each bearing 6 away from photodetector 8 that same root vibrating sensing optical cable 5 detects is different,
Therefore the vibration signal of each bearing can be distinguished by receiving the time of signal.In signal acquisition and processing module 9,
Rayleigh scattering electric signal is compared with bearing failure database after treatment, and then determines the working condition of bearing 6.Light is swept
Imaging apparatus 4 is controlled so as to connect circulator 3 with the vibrating sensing optical cable 5 of different branches, and the state of a large amount of bearings is realized with this
Monitoring.
Signal acquisition and processing module 9 may include AD converter and microprocessor.Signal acquisition and processing module 9 can be with
It is connected to pulse-modulator 2, to control the modulating mode of pulse-modulator 2.Although the laser 1 in the application and pulse tune
Laser that device 2 processed can send out pulse laser by one substitutes, still, in the laser 1 and pulse-modulator 2 of the present invention
Combination in, can use emit continuous light thus less expensive laser 1, and it is right by signal acquisition and processing module 9
The control of pulse-modulator 2, pulse-modulator 2 can generate the pulse laser of different modulating pattern.It should be appreciated that can also incite somebody to action
Laser 1 and pulse-modulator 2 in the application are collectively referred to as the laser generator for sending out pulse laser.Circulator 3
For by the pulse laser from pulse-modulator 2 be transmitted to light scanning apparatus 4 and for will from light scanning apparatus 4 dissipate
It penetrates optical signal and is transmitted to photodetector 8.Well known, circulator is the non-reversible device for having several ends.In this application, it goes in ring
Device 3 has at least three ends.For example, the pulse laser from pulse-modulator 2 enters circulator 3 from end 1, light is output to from end 2
Scanning means 4；Scattered light signal from light scanning apparatus 4 enters circulator 3 from end 2, and photodetector 8 is output to from end 3.
Signal acquisition and processing module 9 are also connected to light scanning apparatus 4, not control light scanning apparatus 4 by circulator 3 and not
Vibrating sensing optical cable 5 with branch is connected to, and signal acquisition and processing module 9 can also control light scanning apparatus 4 by 3 He of circulator
A certain vibrating sensing optical cable 5 connection retention time, that is, monitor the root vibrating sensing optical cable 5 be connected to bearing 6 it is lasting when
Between.The retention time or duration can be according to the numbers and/or the root for the bearing 6 that the root vibrating sensing optical cable 5 is connected to
The length of vibrating sensing optical cable 5 determines.
Power module 10 is laser 1, pulse-modulator 2, light scanning apparatus 4, photodetector 8, signal acquisition and place
Reason module 9 etc. needs the component of electric power to provide electric power.
More (n roots) vibrating sensing optical cables 5 are parallel to light scanning apparatus 4, (swash in the end of every vibrating sensing optical cable 5
Front end in light direction of advance) one attenuator 7 of connection.Attenuator 7 can fall the laser attenuation of advance, to prevent or drop
The low laser being reflected back is formed as the noise of scattered light signal.
Every vibrating sensing optical cable 5 may be coupled to multiple (m) bearings.Thus, monitoring system of the invention can supervise
Survey the state of m × n bearing.Certainly, the number for the bearing 6 that every vibrating sensing optical cable 5 connects (monitoring) can also be different.
As shown in Fig. 2, light scanning apparatus 4 include two plane mirrors 401A and 401B, fixed plate 402, motor 403 and
Multiple (be greater than or equal to n) laser couplers 404A, 404B, 404C ....Two plane mirrors 401A's and 401B is anti-
It is parallel to each other relative to one another to penetrate face.The reflecting surface of two plane mirrors 401A and 401B are relative to each other.Two planes
The end face of speculum 401A and 401B are not in the same plane.Two plane mirrors 401A and 401B are mounted on fixed plate 402
On, their symmetrical centre is overlapped with the center of fixed plate 402.Fixed plate 402 is mounted on the main shaft of motor 403, motor 403
Main-shaft axis and fixed plate axis overlap, and by the symmetrical centre of two plane mirrors 401A and 401B.Laser coupled
Device 404A, 404B, 404C ... connect respectively with a vibrating sensing optical cable 5.
Fig. 3 shows the operation principle of light scanning apparatus 4, and the laser (incident laser 101) from circulator 3 is with fixation side
It is parallel with the 102 summation incident laser 101 of shoot laser that 401B reflects through two plane mirror 401A to incidence, and enter
Laser couplers 404A and coupled vibrating sensing optical cable 5.When motor 403 drives plane mirror 401A and 401B around it
When symmetrical centre 405 rotates, i.e., position 401A and 401B shown in plane mirror from solid line turn to position shown in phantom
When 401A ' and 401B ', shoot laser 102 ' generates parallel offset compared to the shoot laser 102 before rotation, and enters laser coupled
Device 404B and coupled vibrating sensing optical cable 5.Multiple coupler 404A for being arranged in the plane perpendicular to shoot laser,
404B, 404C ..., you can it will be in the laser coupled in free space to vibrating sensing optical cable 5.
Light scanning apparatus 4 is the form of input all the way, Multichannel Parallel output, and output way amount may range from 4 to 64.Light
Scanning means 4 is configured to the incident laser 101 from circulator 3 being sequentially input to more vibrating sensing optical cables 5.Light is swept
Imaging apparatus 4 can be configured to the incident laser 101 from circulator 3 being cyclically sequentially inputted to more vibrating sensing optical cables
5 (multiple laser couplers 404A, 404B, 404C ...).Light scanning apparatus 4 can also be according to signal acquisition and processing module 9
Control the incident laser 101 from circulator 3 is selectively input to specific vibrating sensing optical cable 5.
It should be appreciated that it is above-mentioned by " incident laser 101 is sequentially input to more vibrating sensing optical cables 5 " it is merely meant that same
One time only inputted laser to a vibrating sensing optical cable 5, in different time, can input and swash to different vibrating sensing optical cables 5
Light.This is not offered as in turn or cyclically inputting laser to all vibrating sensing optical cables 5, is also not offered as shaking to more
The time that dynamic sensing optic cable 5 inputs laser must be equal to each other.It, can not also be to any vibration in sometime point or period
Sensing optic cable 5 inputs laser.The manner of execution of light scanning apparatus 4 can be suitably controlled by signal acquisition and processing module 9.
The structure of the light scanning apparatus of the present invention is not limited to above structure.The quantity of speculum can also be one or more
It is a.The quantity of motor can also be one or more.Motor can make one or more speculums rotations or mobile, and motor may be used also
So that the partially reflecting mirror rotation or mobile in multiple speculums.Motor can also make multiple laser couplers while movement, or
Person makes a selected laser couplers be moved to the position for receiving incident laser.Moreover, two speculums nor is it necessary that it is flat
Row configuration.
As shown in figure 4, vibrating sensing optical cable 5 is divided into two kinds of different structure parts, transmission section 501 according to different functions
For fibre core (also referred to as naked fibre) 503 solid constructions wrapped up by protective case 504 and covering 505, transducing part 502 is hollow knot
Structure, that is, fibre core 503 vacantly in protective case 504, does not have covering 505 between protective case 504 and fibre core 503.
On the length direction of vibrating sensing optical cable 5, transmission section 501 and transducing part 502 are alternately arranged.Transducing part
502 for installation into bearing, with the vibration of sensing bearing.Transmission section 501 is used for transmission laser and the scattering light of negative line feed.
Transducing part 502 is more suitable for sense vibrations than transmission section 501.Certainly, laser and scattering light can also pass in transducing part 502
It is defeated.
It should be appreciated that transducing part 502, which is installed to bearing, covers inner ring or outer ring that transducing part 502 is installed to bearing
On, but this is not easily accomplished in many cases.Thus, transducing part 502 is installed to bearing and is also contemplated by transducing part 502
It is installed to and bearing touch and other components (such as end cap of bearing cited below) of the vibration of receiving bearing.
As shown in figure 5, vibrating sensing optical cable 5 can be installed to the end cap 601 of bearing 6.End cap 601 includes Circular Plate 602
With the axial side flange 603 outstanding of inner circumferential direction from Circular Plate 602.Circumferential recess 604 is provided on flange 603.Vibration
The transducing part 502 of sensing optic cable 5 is freely wound in the circumferential recess 604 of the flange 603 of end cap 601.Vibrating sensing optical cable 5
The transmission section 501 of non-vibration sensing is fixed.
When the end cap 601 is installed to bearing 6, flange 603 is against the outer ring of bearing 6, with the vibration of receiving bearing.Annulus
Plate 602 can be contained in bearing block.
Host of the bearing state on-line monitoring system in addition to vibrating sensing optical cable 5 based on optical fiber vibration sensing of the present invention
It is placed on the substantially intermediate or center for the multiple bearings for needing to monitor, increases the quantity of monitoring bearing with this.
The bearing state on-line monitoring system based on optical fiber vibration sensing of the present invention can also include bearing fault pattern
Database (such as voice print database).In this way, scattered light signal and bearing that signal acquisition and processing module 9 can be obtained
Data in fault mode database are compared, to determine the working condition and/or failure type of bearing.Thus, the present invention
Monitoring system can be referred to as " intelligence " bearing state on-line monitoring system.
In the bearing state on-line monitoring system based on optical fiber vibration sensing of the present invention, pass through the vibration of special designing
Sensing optic cable and its installation method, the layout type and light scanning apparatus of function element, the present invention provides one kind by carrying
High optical fiber vibration monitoring device sensitivity reduces energy loss to improve monitoring number of bearings, to realize that set of system is supervised online
Survey the technical solution of multiple bearings.The technical solution can substantially reduce system cost, improve bearing on-line monitoring system in high speed
The feasibility of large-scale application is realized in the equipment such as train, Wind turbines and multiple lathes.
The present invention also provides a kind of, and the bearing state based on optical fiber vibration sensing based on above-mentioned monitoring system is monitored on-line
Method.
It should be appreciated that the above embodiment is merely exemplary, it is not used in the limitation present invention.Those skilled in the art can be with
Various modifications and changes are made to the above embodiment under the teachings of the present invention, without departing from the scope of the present invention.
Claims (10)
1. a kind of bearing state on-line monitoring system based on optical fiber vibration sensing, the monitoring system include laser generator,
Circulator, light scanning apparatus, more vibrating sensing optical cables, photodetector and signal acquisition and processing module,
The laser generator is used to send out pulse laser,
The pulse laser generated by the laser generator enters the light scanning apparatus by the circulator,
The light scanning apparatus is used to the pulse laser being sequentially input to the more vibrating sensing optical cables,
Every vibrating sensing optical cable in the more vibrating sensing optical cables is used to sense the vibration of one or more bearings, from
The more vibrating sensing optical cable transmissions come, scattered light signal with bear vibration information via the light scanning apparatus and
The circulator enters the photodetector,
The photodetector is used to the scattered light signal being converted to electric signal, and gives the electric signal transmission to the signal
Acquisition and processing module,
The signal acquisition and processing module are used to handle the electric signal come from photodetector transmission, and
The working condition of bearing is determined by the electric signal.
2. the bearing state on-line monitoring system according to claim 1 based on optical fiber vibration sensing, which is characterized in that
The laser generator includes laser and pulse-modulator,
The laser generated by the laser enters the light by the circulator after being modulated by the pulse-modulator and sweeps
Imaging apparatus.
3. the bearing state on-line monitoring system according to claim 1 based on optical fiber vibration sensing, which is characterized in that
The end far from the light scanning apparatus of the more vibrating sensing optical cables is respectively connected with attenuator, and the attenuator is used
In the pulse laser decaying for making to transmit in the vibrating sensing optical cable.
4. the bearing state on-line monitoring system according to claim 1 based on optical fiber vibration sensing, which is characterized in that
The monitoring system further includes bearing fault pattern database, the telecommunications that the signal acquisition and processing module are obtained
It number is compared with the data in the bearing fault pattern database, to determine the working condition and/or failure type of bearing.
5. the bearing state on-line monitoring system according to claim 1 based on optical fiber vibration sensing, which is characterized in that
The light scanning apparatus includes speculum, motor and multiple laser couplers,
Pulse laser from the circulator is incident on the speculum, the motor so that the speculum is moved and will be described
Pulse laser is reflected into the selected laser couplers in the multiple laser couplers, the multiple laser couplers difference
It is connect with the more vibrating sensing optical cables, to make the pulse laser be incident in corresponding vibrating sensing optical cable.
6. the bearing state on-line monitoring system according to claim 5 based on optical fiber vibration sensing, which is characterized in that
The light scanning apparatus includes two parallel speculums and fixed plate, and described two parallel speculums are installed on described
Fixed plate, the fixed plate are installed on the main shaft of the motor, the end faces of described two parallel speculums not in same plane,
The symmetrical centre of described two parallel speculums is on the main-shaft axis of the motor.
7. the bearing state on-line monitoring system according to claim 1 based on optical fiber vibration sensing, which is characterized in that
The vibrating sensing optical cable includes the hanging transducing part of fibre core and solid transmission section, in the vibrating sensing optical cable
Length direction on, the transmission section and the transducing part are alternately arranged,
The transducing part is for installation into bearing, and with the vibration of sensing bearing, the transmission section is used for transmission the pulse
Laser and the scattering light.
8. the bearing state on-line monitoring system according to claim 7 based on optical fiber vibration sensing, which is characterized in that
The transducing part of the vibrating sensing optical cable is wound in the circumferential recess of the flange of the end cap of shaft end, and the vibration passes
The transmission section of sensing optical cable is fixed,
The flange of the end cap of the bearing is resisted against the outer ring of bearing, with the vibration of receiving bearing.
9. the bearing state on-line monitoring system according to any one of claim 1 to 8 based on optical fiber vibration sensing,
It is characterized in that,
The centre position for being partially disposed in the multiple bearings for needing to monitor outside the vibrating sensing optical cable of the monitoring system.
10. a kind of bearing state on-line monitoring method based on optical fiber vibration sensing, the monitoring method include the following steps：
Send out pulse laser；
The pulse laser is sequentially input in more vibrating sensing optical cables, wherein every vibrating sensing optical cable is all connected with
To one or more bearings, with the vibration of sensing bearing；
Come from the more vibrating sensing optical cable transmissions, scattered light signal with bear vibration information is converted into telecommunications
Number, and the electric signal is handled, and the working condition of bearing is determined by the electric signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710032443.2A CN108318248B (en) | 2017-01-16 | 2017-01-16 | Optical fiber vibration sensing-based bearing state online monitoring system |
| PCT/CN2018/072604 WO2018130217A1 (en) | 2017-01-16 | 2018-01-15 | Bearing status online monitoring system and method based on optical fiber vibration sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710032443.2A CN108318248B (en) | 2017-01-16 | 2017-01-16 | Optical fiber vibration sensing-based bearing state online monitoring system |
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| CN108318248A true CN108318248A (en) | 2018-07-24 |
| CN108318248B CN108318248B (en) | 2021-09-28 |
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| CN113654788A (en) * | 2021-09-18 | 2021-11-16 | 西华师范大学 | Optical fiber sensing system for online monitoring of rotating shaft state |
| CN115882937A (en) * | 2022-11-30 | 2023-03-31 | 江苏亮点光电研究有限公司 | Optical time domain reflection-based optical fiber laser state online monitoring optical path and method |
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| CN110867195B (en) * | 2019-11-20 | 2023-12-12 | 四川赛康智能科技股份有限公司 | Online defect monitoring method for electric main equipment based on voiceprint and vibration |
| CN112459972A (en) * | 2020-12-01 | 2021-03-09 | 新疆大学 | Wind driven generator main bearing state monitoring device and monitoring method thereof |
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| CN113654788A (en) * | 2021-09-18 | 2021-11-16 | 西华师范大学 | Optical fiber sensing system for online monitoring of rotating shaft state |
| CN113654788B (en) * | 2021-09-18 | 2023-09-08 | 西华师范大学 | Optical fiber sensing system for online monitoring of rotating shaft state |
| CN115882937A (en) * | 2022-11-30 | 2023-03-31 | 江苏亮点光电研究有限公司 | Optical time domain reflection-based optical fiber laser state online monitoring optical path and method |
| CN115882937B (en) * | 2022-11-30 | 2024-01-09 | 江苏亮点光电研究有限公司 | Optical time domain reflection-based optical fiber laser state online monitoring light path and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108318248B (en) | 2021-09-28 |
| WO2018130217A1 (en) | 2018-07-19 |
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