CN201885826U - Electromechanical equipment optical fiber online monitoring system - Google Patents
Electromechanical equipment optical fiber online monitoring system Download PDFInfo
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- CN201885826U CN201885826U CN2010206123252U CN201020612325U CN201885826U CN 201885826 U CN201885826 U CN 201885826U CN 2010206123252 U CN2010206123252 U CN 2010206123252U CN 201020612325 U CN201020612325 U CN 201020612325U CN 201885826 U CN201885826 U CN 201885826U
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Abstract
An electromechanical equipment optical fiber online monitoring system is characterized by comprising an optical circulator and a wideband light source. The wideband light source is connected with an input end of the optical circulator by a connecting optical fiber, a first output end of the optical circulator is connected with an optical fiber temperature sensor, an optical fiber strain sensor and an optical fiber vibration sensor by transmission optical cables, the optical fiber temperature sensor, the optical strain sensor and the optical fiber vibration sensor are connected together in series, a second output end of the optical circulator outputs optical signals to a modularized spectrometer, the modularized spectrometer converts the optical signals into electric signals, and the electric signals are acquired by a data acquisition unit, and then transmitted to a data analyzer for processing prior to being transmitted to a displayer for display. The electromechanical equipment optical fiber online monitoring system mainly realizes online monitoring of temperature, strain and vibration on one optical fiber by the aid of wavelength division multiplexing technology, obtains running states of equipment by the aid of online analysis of different parameters, can also find causes and the position of a fault, simultaneously can realize status parameter online monitor of multiple equipment after adding an optical path switching module, improves loading capacity, and provides a basis for parameter analysis and management of the multiple equipment.
Description
Technical field
The utility model relates to a kind of monitoring device of electromechanical equipment presence, relates in particular to a kind of fiber-optic monitoring system.
Background technology
The electromechanical equipment safety monitoring is being born support equipment and is being moved normally, preventing that run case from developing into the function of accident conditions, and safety is had very important effect.For example: genset is the important component part of equipment vitality in order to guarantee the required power supply of electric power, and along with the raising of automaticity, consumer is more and more, and the quality of genset operation is the whole security performance of influence directly.In order to guarantee electromechanical equipment long period, safe operation at full capacity, more and more need the running status and the long-run development trend of electromechanical equipment are monitored and forecast, according to state equipment is carried out leading management and anticipatory maintenance, prevent trouble before it happens so that accomplish, reduce catastrophic failure and reduce maintenance cost, increase economic efficiency.Grasp the parameters of operation in real time, accomplish timely early warning and diagnosis with the fault that may occur, and carry out performance maintenance visual plants such as genset; Operating experience shows that electromechanical equipment influences overall operation because of electronics, the mechanical equipment fault that super shake, overtemperature, superpressure and corrosion etc. cause is the principal element that causes a serious accident.
At present, the Configuration Inspection of important electromechanical equipment is based on maintenance process and the preceding checkout of operation, and the main operational factor with equipment place system in service is monitored based on artificial inspection, lacks real-time, actual effect, has the hysteresis problem.The means of artificial inspection are mainly based on infrared measurement of temperature, electric insulation measurement, motor bearings vibration measuring etc., and required monitoring equipment is many, and efficient is poor.There is a few devices to realize the on-line monitoring of running status, detect and detected based on the virtual instrument of PC modern age as traditional electronic instrument, the electronic sensors that adopt, its technological requirement height, maintenanceability be poor, be difficult to insulation processing, be subject to problem such as the interference of electromagnetic field more.And Fibre Optical Sensor has more outstanding advantage as a kind of optical profile type measurement, if any higher sensitivity and resolution, measure the frequency band broad, response speed is fast, have than great dynamic range, volume is little, long transmission distance, itself is not charged, wiring is simple, is not subjected to electromagnetic interference (EMI), and radiation resistance is good, be not acted upon by temperature changes, corrosion-resistant, can realize the single line multimetering, cumulative volume is little, be suitable for inflammable, explosive, space and be subjected to use under the rugged surroundings such as strict restriction and strong electromagnetic etc., realize the real-time monitoring, diagnosing of fault easily.
Adopt optical fiber sensing technology, real time on-line monitoring and analysis to multimode parameters such as the temperature of electromechanical equipment, strain, vibrations can in real time, objectively reflect the equipment operation state of the art, and avoid unnecessary shutdown maintenance and blindly overhaul, use manpower and material resources sparingly, improve plant factor; By the on-line fault diagnosis analysis, find some incipient faults, to handle early, the generation of trouble saving or accident reduces accident rate, guarantees device security, long-term operation; The character and the reason that have an accident are provided, shorten troubleshooting and repair time, improve repair quality; For designing unit and manufacturer provide the problem of equipment actual operating state and existence, help improving design and workmanship or the like.This shows, electromechanical equipment real time on-line monitoring and fault diagnosis technology are explored and studied, for guaranteeing long-term, reliable, the efficient operation of these equipment, thereby guarantee that safety and production is significant and actual application value with increasing economic efficiency.
Summary of the invention
Can not real-time online and electronic sensor deficiency in order to overcome existing electromechanical equipment safety monitoring, the invention provides a kind of optical fiber on-line monitoring system.But the various states parameter of native system on-line real time monitoring equipment operation can realize that also the state parameter of many equipment is monitored simultaneously, helps unified operating analysis, management and the fault diagnosis of equipment.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of electromechanical equipment optical fiber on-line monitoring system, it is characterized in that it comprises optical circulator and the wideband light source that is connected with the optical circulator input end, optical circulator first output terminal is connected with the fibre optic temperature sensor that is cascaded, fibre optic strain sensor and optical fibre vibration sensor by transmission cable; Second output terminal output light signal of optical circulator is to the modular optical spectrometer, and the modular optical spectrometer is converted into electric signal with light signal, and electric signal send display to show after sending the data-analyzing machine processing after the data acquisition unit collection.
Wideband light source is the ASE light source, and spectral width is 40nm, and scope is 1525nm-1565nm.Fibre optic temperature sensor, fibre optic strain sensor and optical fibre vibration sensor all adopt bragg grating, and the wavelength coverage of work does not overlap mutually.Described transmission cable be connected optical fiber and be single mode fiber cable.The modular optical spectrometer is the spectrometer module of 1550 wave bands.Data-analyzing machine is an atom D510 processor.Fiber optic temperature, fibre strain, optical fibre vibration sensor all adopt the fiber grating of 1550nm wave band to make, and serve as that sign is distinguished with different wavelength, and the wavelength coverage of each working sensor that is cascaded are not overlapping.The wide range light that wideband light source sends inserts transmission cable behind optical circulator, enter fiber optic temperature, fibre strain, optical fibre vibration sensor successively, and each sensor reflected back respectively has the narrow band light grating spectrum signal of temperature, strain and vibration information.The modular optical spectrometer changes the light signal that reflects into electric signal, obtain the intensity information in the whole broadband spectral scope, and upload to data-analyzing machine by data acquisition unit, data-analyzing machine carries out data analysis, find the centre wavelength of each sensor grating, and according to the definition working range distinguish fiber optic temperature, fibre strain, optical fibre vibration sensor, wavelength conversion situation by analyte sensors can draw temperature, strain, the vibration parameters of being monitored, the running status of analytical equipment is finally carried out parameter by display and state shows.
A kind of electromechanical equipment optical fiber on-line monitoring system that the utility model also relates to, it is characterized in that it comprises optical circulator and the wideband light source that is connected with the optical circulator input end, optical circulator first output terminal is connected with the fibre optic temperature sensor that is cascaded, fibre optic strain sensor and optical fibre vibration sensor with transmission cable by the light path handover module successively, and described transmission cable is the single mode multifiber cable; Second output terminal output light signal of optical circulator is to the modular optical spectrometer, and the modular optical spectrometer is converted into electric signal with light signal, and electric signal send display to show after sending data-analyzing machine to handle after the data acquisition unit collection.Can realize on-line monitoring, improve the band carrying capacity of system greatly multiple devices.
The utility model beneficial effect is: 1, can realize the real-time monitoring and the analysis of multimode parameter, by the on-line fault diagnosis analysis, find some incipient faults, handle early, the generation of trouble saving or accident reduces accident rate, guarantees device security, long-term, running at full capacity; 2, use Fibre Optical Sensor, higher sensitivity and resolution are arranged, measure the frequency band broad, response speed is fast, has than great dynamic range, and volume is little, long transmission distance, itself is not charged, and wiring is simple, is not subjected to electromagnetic interference (EMI), radiation resistance is good, be not acted upon by temperature changes, corrosion-resistant, be suitable for inflammable, explosive, space and be subjected to use under the rugged surroundings such as strict restriction and strong electromagnetic; 3, use wavelength-division multiplex technique, the sensor of a plurality of different parameters of can realizing connecting simultaneously on same the optical fiber; 4, use the light path handover module, can realize the on-line measurement of many equipment status parameters.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a schematic diagram of the present utility model; Fig. 2 is the wavelength-division multiplex schematic diagram of sensor in the utility model; Fig. 3 is the Extended Principle Diagram of the utility model multichannel; Among the figure: 1-wideband light source, 2-optical fiber circulator, 3-transmission cable, 4-temperature sensor, 5-strain transducer, 6-vibration transducer, 7-modular optical spectrometer, 8-data acquisition unit, 9-data-analyzing machine, 10-display, 11-light path handover module.
Embodiment
Present embodiment is a kind of electromechanical equipment optical fiber on-line monitoring system, and embodiment is as follows:
As shown in Figure 1, the utility model relates to a kind of electromechanical equipment optical fiber on-line monitoring system, specifically comprises wideband light source 1, ring of light device 2, transmission cable 3, fibre optic temperature sensor 4, fibre optic strain sensor 5, optical fibre vibration sensor 6, modular optical spectrometer 7, data acquisition unit 8, data processor 9 and display 10.The output of wideband light source 1 connects the input end of optical circulator 2, the input end of the output termination transmission cable 3 of optical circulator 2, the input end of the output termination fibre optic temperature sensor 4 of transmission cable 3, the input end of the output termination fibre optic strain sensor 5 of fibre optic temperature sensor 4, the input end of the output termination optical fibre vibration sensor 6 of fibre optic strain sensor, the return terminal connection module spectrometer 7 of optical circulator 2 connects the input end of data acquisition unit 8, the input end of the output termination data processor 9 of data acquisition unit 8, the output termination display 10 of data processor 9.
Wideband light source 1 sends continuous broadband spectral, through optical circulator 2 and transmission cable 3, enter into fibre optic temperature sensor 4, fibre optic strain sensor 5 and optical fibre vibration sensor 6, the Bragg grating spectrum that centre wavelength of each sensor reflected back is different, through the return terminal of transmission cable and optical circulator to modular optical spectrometer 7, modular optical spectrometer 7 obtains the data of overall optical spectral width after opto-electronic conversion, data-analyzing machine 9 is analyzed data acquisition unit 8 from the data that modular optical spectrometer 7 collects, obtain the centre wavelength value of each sensor, situation of change according to centre wavelength calculates the temperature that is detected, strain, the numerical value of vibration shows numerical value by display 10 at last.
What 1 example of wideband light source adopted is the ASE light source, and spectral width is 40nm, and scope is 1525nm-1565nm;
Transmission cable all adopts single-mode fiber with all optical fiber that is connected;
Fibre optic temperature sensor 4, fibre optic strain sensor 5, optical fibre vibration sensor 6 all adopt bragg grating to make, and the employing order is connected in series, not influenced by three sensor orders of connection but separate timing, and centre wavelength is relevant during only with sensor production;
Fibre optic temperature sensor 4, fibre optic strain sensor 5, optical fibre vibration sensor 6 use the wavelength-division multiplex technique district to be connected in series on the optical fiber, increase the band carrying capacity of system, use λ in this example
1, λ
2, λ
3Distinguished;
The main effect of optical circulator is to realize can realizing input, exporting and return of light, has bigger isolation in input with between returning, and avoids crosstalking of light; Be input to output and output to and return smaller insertion loss, improve the utilization rate of light source power;
7 examples of modular optical spectrometer adopt the spectrometer module of 1550 wave bands, the light signal of 1525nm-1565nm can be converted to electric signal, and can obtain rectifying and improving the power level value in wideband light source 1 scope;
8 examples of data acquisition unit adopt the NI capture card, are responsible for the data of acquisition module spectrometer 7, and are uploaded to data-analyzing machine 9;
9 examples of data-analyzing machine adopt atom D510 processor, the data that obtain can be analyzed, find the centre wavelength value of each sensor, and can be distinguished according to the working range that defines, finally demodulate temperature, strain, vibrating numerical by wavelength change separately, analyze the duty of electromechanical equipment;
In the specific implementation, so parameter is on-line monitoring, in the process of equipment operation, can realize the collection and the analysis of parameter.
As shown in Figure 2, fibre optic temperature sensor 4, fibre optic strain sensor 5 and optical fibre vibration sensor are connected on the optical fiber, adopt wavelength-division multiplex technique, the centre wavelength value difference of three sensors, and given three perform regions not overlapping, avoided temperature, strain, three physical parameters of vibration λ in this example to occur obscuring separating timing
1, λ
2, λ
3The centre wavelength of representing fiber optic temperature, strain, vibration transducer respectively;
Present embodiment is another kind of electromechanical equipment optical fiber on-line monitoring system, repeat no more with embodiment 1 something in common, difference is as follows: as shown in Figure 3, the utility model in theory structure optical circulator 2 and transmission cable 3 between increase a light path handover module 11, transmission cable 3 adopts multifiber cable, can realize the state parameter on-line monitoring on many electromechanical equipments.The main effect of light path handover module 11 is to carry out passage to switch between different fiber, can significantly improve the capacity of total system.
Light path handover module 11 uses photoswitch to carry out the light path switching in this example;
The utility model has solved a kind of electromechanical equipment optical fiber on-line monitoring scheme, monitoring comprising fiber optic temperature, strain, vibration parameters, signal uses Optical Fiber Transmission, sensing element adopts Fibre Optical Sensor, but have not charged, be not subjected to the advantages such as electromagnetic interference, wiring are simple, corrosion-resistant, the big on-line monitoring of dynamic range. Simultaneously also solved the parameter monitoring of equipment in running, on-line analysis gives warning in advance to equipment fault, reduces maintenance cost.
Claims (10)
1. electromechanical equipment optical fiber on-line monitoring system, it is characterized in that it comprise optical circulator with the optical circulator input end by being connected the wideband light source that optical fiber connects, optical circulator first output terminal is connected with the fibre optic temperature sensor that is cascaded, fibre optic strain sensor and optical fibre vibration sensor by transmission cable; Second output terminal output light signal of optical circulator is to the modular optical spectrometer, and the modular optical spectrometer is converted into electric signal with light signal, and electric signal send display to show after sending the data-analyzing machine processing after the data acquisition unit collection.
2. electromechanical equipment optical fiber on-line monitoring system according to claim 1 is characterized in that fibre optic temperature sensor, fibre optic strain sensor and optical fibre vibration sensor all adopt bragg grating, and the wavelength coverage of work does not overlap mutually.
3. electromechanical equipment optical fiber on-line monitoring system according to claim 1 is characterized in that wideband light source is the ASE light source, and spectral width is 40nm, and scope is 1525nm-1565nm.
4. electromechanical equipment fiber-optic monitoring according to claim 1 system is characterized in that described transmission cable and is connected optical fiber and is single mode fiber cable.
5. electromechanical equipment fiber-optic monitoring according to claim 1 system is characterized in that the modular optical spectrometer is the spectrometer module of 1550 wave bands.
6. electromechanical equipment fiber-optic monitoring according to claim 1 system is characterized in that data-analyzing machine is an atom D510 processor.
7. electromechanical equipment optical fiber on-line monitoring system, it is characterized in that it comprise optical circulator with the optical circulator input end by being connected the wideband light source that optical fiber connects, optical circulator first output terminal is connected with the fibre optic temperature sensor that is cascaded, fibre optic strain sensor and optical fibre vibration sensor with transmission cable by the light path handover module successively, and described transmission cable is the single mode multifiber cable; Second output terminal output light signal of optical circulator is to the modular optical spectrometer, and the modular optical spectrometer is converted into electric signal with light signal, and electric signal send display to show after sending data-analyzing machine to handle after the data acquisition unit collection.
8. electromechanical equipment optical fiber on-line monitoring system according to claim 7 is characterized in that described light path handover module is a photoswitch.
9. electromechanical equipment fiber-optic monitoring according to claim 8 system is characterized in that fibre optic temperature sensor, fibre optic strain sensor and optical fibre vibration sensor all adopt bragg grating, and the wavelength coverage of work does not overlap mutually.
10. electromechanical equipment fiber-optic monitoring according to claim 8 system is characterized in that wideband light source is the ASE light source, and spectral width is 40nm, and scope is 1525nm-1565nm; Described transmission cable be connected optical fiber and be single mode fiber cable; The modular optical spectrometer is the spectrometer module of 1550 wave bands; Data-analyzing machine is an atom D510 processor.
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| CN2010206123252U CN201885826U (en) | 2010-11-18 | 2010-11-18 | Electromechanical equipment optical fiber online monitoring system |
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| CN2010206123252U CN201885826U (en) | 2010-11-18 | 2010-11-18 | Electromechanical equipment optical fiber online monitoring system |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487162A (en) * | 2013-08-15 | 2014-01-01 | 国网吉林省电力有限公司长春供电公司 | High voltage equipment contact temperature online monitoring system based on optical fiber network |
| CN103791848A (en) * | 2014-01-16 | 2014-05-14 | 云南电力试验研究院（集团）有限公司电力研究院 | Transformer winding monitoring system based on optical fiber sensing technology |
| CN104215197A (en) * | 2014-03-20 | 2014-12-17 | 哈尔滨工业大学 | Device and method for measuring shapes of spaces on basis of low-reflectivity three-core fiber grating arrays |
| CN104614091A (en) * | 2015-02-05 | 2015-05-13 | 中国科学院合肥物质科学研究院 | All-fiber long-distance high-spatial-resolution single-photon temperature sensor |
| CN106043168A (en) * | 2016-06-30 | 2016-10-26 | 大连楼兰科技股份有限公司 | Real-time monitoring system and method for vehicle body health conditions |
| CN104111127B (en) * | 2014-07-28 | 2017-01-25 | 北京航天易联科技发展有限公司 | Optical wavelength division multiplexer bandwidth selecting device |
| US9557232B2 (en) | 2013-05-10 | 2017-01-31 | Corning Optical Communications LLC | Structural strain sensing optical cable |
| CN106596104A (en) * | 2016-12-22 | 2017-04-26 | 湖北工程学院 | Apparatus and method for monitoring rolling bearing |
| CN106972976A (en) * | 2017-05-19 | 2017-07-21 | 烽火通信科技股份有限公司 | Intelligent optical fiber wiring system and the implementation method for replacing electronic tag with fibre optical sensor |
| CN107219020A (en) * | 2017-07-21 | 2017-09-29 | 无锡市曙光电缆有限公司 | A kind of power cable joint temperature-measuring system |
| CN107402112A (en) * | 2017-08-25 | 2017-11-28 | 北京航空航天大学 | A kind of operational modal analysis system and method based on optical fiber sensing network |
| CN107452177A (en) * | 2017-04-14 | 2017-12-08 | 浙江省邮电工程建设有限公司 | A kind of communications optical cable safety pre-warning system |
| CN107990836A (en) * | 2017-11-21 | 2018-05-04 | 武汉理工大学 | A kind of pipelines and petrochemical pipelines strain and temperature online monitoring system and method |
| CN108061522A (en) * | 2017-12-14 | 2018-05-22 | 贵州航天计量测试技术研究所 | Distribution type fiber-optic Bragg grating MISSILE LAUNCHING case strain monitoring system |
| CN108731597A (en) * | 2018-05-11 | 2018-11-02 | 南京工程学院 | A kind of light path optical-fibre precise displacement sensor altogether |
| CN109507453A (en) * | 2018-12-06 | 2019-03-22 | 广州广电计量检测股份有限公司 | A kind of revolving speed calibration system and calibration method based on fiber grating |
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| CN110715752A (en) * | 2019-07-23 | 2020-01-21 | 国网山西省电力公司信息通信分公司 | Optical cable joint box detection system and method |
| CN111323144A (en) * | 2020-03-27 | 2020-06-23 | 武汉理工大学 | Distributed optical fiber sensing system for simultaneously measuring temperature, strain and vibration |
| CN113055085A (en) * | 2021-02-04 | 2021-06-29 | 国网山西省电力公司太原供电公司 | Power communication network operation and maintenance device |
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| CN116295789A (en) * | 2023-05-18 | 2023-06-23 | 齐鲁工业大学(山东省科学院) | Combined vibration detection system based on distributed fiber bragg grating strain sensor |
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2010
- 2010-11-18 CN CN2010206123252U patent/CN201885826U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9557232B2 (en) | 2013-05-10 | 2017-01-31 | Corning Optical Communications LLC | Structural strain sensing optical cable |
| CN103487162A (en) * | 2013-08-15 | 2014-01-01 | 国网吉林省电力有限公司长春供电公司 | High voltage equipment contact temperature online monitoring system based on optical fiber network |
| CN103791848A (en) * | 2014-01-16 | 2014-05-14 | 云南电力试验研究院（集团）有限公司电力研究院 | Transformer winding monitoring system based on optical fiber sensing technology |
| CN104215197A (en) * | 2014-03-20 | 2014-12-17 | 哈尔滨工业大学 | Device and method for measuring shapes of spaces on basis of low-reflectivity three-core fiber grating arrays |
| CN104215197B (en) * | 2014-03-20 | 2019-07-30 | 哈尔滨工业大学 | Based on three core fibre grating array spatial form measuring device of antiradar reflectivity and method |
| CN104111127B (en) * | 2014-07-28 | 2017-01-25 | 北京航天易联科技发展有限公司 | Optical wavelength division multiplexer bandwidth selecting device |
| CN104614091A (en) * | 2015-02-05 | 2015-05-13 | 中国科学院合肥物质科学研究院 | All-fiber long-distance high-spatial-resolution single-photon temperature sensor |
| CN106043168A (en) * | 2016-06-30 | 2016-10-26 | 大连楼兰科技股份有限公司 | Real-time monitoring system and method for vehicle body health conditions |
| CN106596104A (en) * | 2016-12-22 | 2017-04-26 | 湖北工程学院 | Apparatus and method for monitoring rolling bearing |
| CN107452177A (en) * | 2017-04-14 | 2017-12-08 | 浙江省邮电工程建设有限公司 | A kind of communications optical cable safety pre-warning system |
| CN107452177B (en) * | 2017-04-14 | 2023-05-23 | 浙江省邮电工程建设有限公司 | Communication optical cable safety precaution system |
| CN106972976B (en) * | 2017-05-19 | 2019-09-27 | 烽火通信科技股份有限公司 | Intelligent optical fiber wiring system and the implementation method for replacing electronic tag with fibre optical sensor |
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| CN107402112A (en) * | 2017-08-25 | 2017-11-28 | 北京航空航天大学 | A kind of operational modal analysis system and method based on optical fiber sensing network |
| CN107990836A (en) * | 2017-11-21 | 2018-05-04 | 武汉理工大学 | A kind of pipelines and petrochemical pipelines strain and temperature online monitoring system and method |
| CN108061522A (en) * | 2017-12-14 | 2018-05-22 | 贵州航天计量测试技术研究所 | Distribution type fiber-optic Bragg grating MISSILE LAUNCHING case strain monitoring system |
| CN108731597A (en) * | 2018-05-11 | 2018-11-02 | 南京工程学院 | A kind of light path optical-fibre precise displacement sensor altogether |
| CN109507453A (en) * | 2018-12-06 | 2019-03-22 | 广州广电计量检测股份有限公司 | A kind of revolving speed calibration system and calibration method based on fiber grating |
| CN109687903B (en) * | 2018-12-28 | 2021-09-28 | 东南大学 | Optical fiber macrobend on-line monitoring system and method |
| CN109687903A (en) * | 2018-12-28 | 2019-04-26 | 东南大学 | Optical fiber macrobending on-line monitoring system and method |
| CN110715752A (en) * | 2019-07-23 | 2020-01-21 | 国网山西省电力公司信息通信分公司 | Optical cable joint box detection system and method |
| CN111323144A (en) * | 2020-03-27 | 2020-06-23 | 武汉理工大学 | Distributed optical fiber sensing system for simultaneously measuring temperature, strain and vibration |
| CN113055085A (en) * | 2021-02-04 | 2021-06-29 | 国网山西省电力公司太原供电公司 | Power communication network operation and maintenance device |
| CN113078375A (en) * | 2021-02-09 | 2021-07-06 | 南京大学 | Battery monitoring system and monitoring method |
| CN116295789A (en) * | 2023-05-18 | 2023-06-23 | 齐鲁工业大学(山东省科学院) | Combined vibration detection system based on distributed fiber bragg grating strain sensor |
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