CN104374503A - Explosion-proof motor rotor stress measurement device and method - Google Patents
Explosion-proof motor rotor stress measurement device and method Download PDFInfo
- Publication number
- CN104374503A CN104374503A CN201410704400.0A CN201410704400A CN104374503A CN 104374503 A CN104374503 A CN 104374503A CN 201410704400 A CN201410704400 A CN 201410704400A CN 104374503 A CN104374503 A CN 104374503A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- proof motor
- fiber
- fire proof
- stress
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses an explosion-proof motor rotor stress measurement device and method. The explosion-proof motor rotor stress measurement device comprises a plurality of sets of optical fiber raster stress sensors with different central frequencies, an optical fiber channel arranged in a rotor shaft of an explosion-proof motor, an optical fiber rotary connector and an optical fiber raster stress measuring system, wherein the output ends of the optical fiber raster stress sensors are connected with the input end of a transmission optical fiber inside the explosion-proof motor, the output end of the transmission optical fiber inside the explosion-proof motor is connected with a rotor end of the optical fiber rotary connector through the optical fiber channel in the rotor shaft of the motor, and a stator end of the optical fiber rotary connector is connected with the optical fiber raster stress measuring system based on the wavelength division multiplexing principle through a transmission optical fiber outside the explosion-proof motor. The explosion-proof motor rotor stress measurement device and method can realize rotor stress testing of the explosion-proof motor rotor, and accurately and efficiently realize rotor stress measurement of the explosion-proof motor.
Description
Technical field
The present invention relates to fire proof motor technical field of measurement and test, particularly relate to a kind of fire proof motor rotor stress measurement mechanism and measuring method.
Background technology
Fire proof motor rotor stress is tested, and is of great significance for optimal design, raising fire proof motor reliability tool.Have the multifrequency natures such as strong electromagnetic, air gap are little, narrow space, rotor turns due to fire proof motor, and need inside and outside electric signal isolation, it is the difficult problem of fire proof motor research field that fire proof motor rotor stress is measured always.At present, there is very large difficulty, to the method for the main employing indirect inspection of rotor stress in the stress directly measuring rotor.First temperature of rotor is measured, then by setting up thermodynamical model, the stress of analytical calculation rotor.
At present, studies in China mechanism, scholar propose certain methods to the test of fire proof motor rotor stress, the people such as Wang Yanwu as naval engineering university in 2010 adopts the model of the method establishment of finite element Y100L-2 type rotor, and then analyzes and researches to the temperature field of rotor and Stress Field Distribution.But there is poor for applicability, that measuring accuracy is low shortcoming in the method.For another example the cut two kind method of testings such as around-France and ring core method of the people such as Tan Pengcheng to the surface residual stress of machine shaft of Shanghai Communications University in 2013 have carried out comparative analysis.But the unrelieved stress that its method is only applicable to countershaft is measured, and cannot realize measuring the thermal stress of rotor.
Summary of the invention
The object of this invention is to provide a kind of fiber grating fire proof motor rotor stress measurement mechanism based on wavelength-division multiplex principle and measuring method, a fire proof motor rotor stress test difficult problem can be overcome, realize fire proof motor rotor stress accurately and efficiently and measure.
The present invention adopts following technical proposals:
A kind of fire proof motor rotor stress measurement mechanism, comprise the optical fiber optical grating stress sensor that some group switching centre frequencies are different, be arranged on the optical-fibre channel in fire proof motor armature spindle, fiber rotation connector and optical fiber optical grating stress measuring system, some groups of described optical fiber optical grating stress sensors are separately positioned on fire proof motor rotor, fiber rotation connector is arranged on fire proof motor armature spindle one end, the output terminal of some groups of optical fiber optical grating stress sensors connects the input end of fire proof motor internal transmission optical fiber, the rotor-end of the optical-fibre channel connecting fiber rotary connector of output terminal in rotor axis of electric of fire proof motor internal transmission optical fiber, the stator terminal of fiber rotation connector is connected with the optical fiber optical grating stress measuring system based on wavelength-division multiplex principle by fire proof motor external transmission optical fiber.
Described optical fiber optical grating stress sensor comprises outer field fibre cladding, and be fiber core and fiber grating in fibre cladding, described fiber grating is positioned at centre, and the two ends of fiber grating are fiber core.
Described fiber rotation connector and fire proof motor armature spindle are coaxially installed.
Described optical fiber optical grating stress measuring system is connected with host computer.
The optical fiber optical grating stress sensor that described some group switching centre frequencies are different adopts parallel connection, series connection and/or series-parallel system to connect.
Described optical-fibre channel comprises and is arranged in fire proof motor armature spindle and the radial hole of conducting and axial hole.
A kind of fire proof motor rotor stress measuring method, comprises the following steps:
A: set gradually on rotor first optical fiber optical grating stress sensor, second optical fiber optical grating stress sensor ..., the n-th optical fiber optical grating stress sensor, and the optical-fibre channel connecting fiber rotary connector utilizing fire proof motor internal transmission optical fiber to arrange in rotor axis of electric n optical fiber optical grating stress sensor rotor-end, and the stator terminal of fiber rotation connector to be connected with the optical fiber optical grating stress measuring system based on wavelength-division multiplex principle by fire proof motor external transmission optical fiber;
B: utilize optical fiber optical grating stress measure produce broadband light incide each optical fiber optical grating stress sensor through fire proof motor external transmission optical fiber, fiber rotation connector and fire proof motor internal transmission optical fiber, and each optical fiber optical grating stress sensor is reflected containing stress information reflected light signal again through fire proof motor internal transmission optical fiber, fiber rotation connector and fire proof motor external transmission Optical Fiber Transmission to optical fiber optical grating stress measuring system;
C: the reflected light signal containing stress information collected by optical fiber optical grating stress measuring system, calculates reflected light wavelength variation delta, according to reflected light wavelength variation delta and stress
εfuntcional relationship Δ=
f(
ε), calculate each optical fiber optical grating stress sensor position place fire proof motor rotor stress.
Described optical fiber optical grating stress sensor comprises outer field fibre cladding, and be fiber core and fiber grating in fibre cladding, described fiber grating is positioned at centre, and the two ends of fiber grating are fiber core.
Described fiber rotation connector and fire proof motor armature spindle are coaxially installed.
The optical fiber optical grating stress sensor that described some group switching centre frequencies are different adopts parallel connection, series connection and/or series-parallel system to connect.
Some groups of optical fiber optical grating stress sensors are separately positioned on fire proof motor rotor by the present invention, optical fiber optical grating stress is utilized to measure the broadband light of generation through fire proof motor external transmission optical fiber, fiber rotation connector and fire proof motor internal transmission optical fiber incide each optical fiber optical grating stress sensor, and the reflected light signal containing stress information reflected by each optical fiber optical grating stress sensor is again through fire proof motor internal transmission optical fiber, fiber rotation connector and fire proof motor external transmission Optical Fiber Transmission are to optical fiber optical grating stress measuring system, each optical fiber optical grating stress sensor position place fire proof motor rotor stress is calculated eventually through reflected light wavelength variable quantity.The present invention adopts spectral measurement, and fire proof motor inside is all light signal, avoids the impact of the inner strong electromagnetic of fire proof motor; The diameter of the optical fiber optical grating stress sensor that the present invention uses and Transmission Fibers is very little, and suitable dress property is very good; The present invention, by optical signal transmission fiber, achieves the electrical isolation inside and outside fire proof motor, does not damage the explosion-proof performance of fire proof motor.Measuring method that the present invention carries can realize the stress measurement of fire proof motor rotor multiple spot.
Accompanying drawing explanation
Fig. 1 is fire proof motor temperature of rotor measuring principle figure of the present invention;
Fig. 2 is that the invention process illustrates certain type fire proof motor rotor multipoint temperature measuring schematic diagram;
Fig. 3 is optical fiber optical grating stress sensor structural representation of the present invention;
Fig. 4 is that the invention process illustrates certain type fire proof motor rotor stress test spectral schematic diagram; Wherein 4-a is the spectrum of incident light, and 4-b is the spectrum of reflected light, and 4-c is the spectrum of transmitted light, and 4-d is the spectrum change amount that STRESS VARIATION causes.
Embodiment
As shown in figures 1 and 3, fire proof motor rotor stress measurement mechanism of the present invention, comprise the optical fiber optical grating stress sensor 1 that some group switching centre frequencies are different, be arranged on the optical-fibre channel in fire proof motor armature spindle 3, fiber rotation connector 7 and optical fiber optical grating stress measuring system 9, some groups of optical fiber optical grating stress sensors 1 are separately positioned on fire proof motor rotor, optical fiber optical grating stress sensor 1 comprises outer field fibre cladding 15, be fiber core 16 and fiber grating 17 in fibre cladding 15, described fiber grating 17 is positioned at centre, the two ends of fiber grating 17 are fiber core 16.Optical-fibre channel comprises and is arranged in fire proof motor armature spindle 3 and the radial hole 5 of conducting and axial hole 6, fiber rotation connector 7 is arranged on fire proof motor armature spindle 3 one end, the output terminal of some groups of optical fiber optical grating stress sensors 1 connects the input end of fire proof motor internal transmission optical fiber 4, the radial hole 5 of output terminal in rotor axis of electric of fire proof motor internal transmission optical fiber 4 and the rotor-end of axial hole 6 connecting fiber rotary connector 7, the stator terminal of fiber rotation connector 7 is connected with the optical fiber optical grating stress measuring system 9 based on wavelength-division multiplex principle by fire proof motor external transmission optical fiber 8.Fiber rotation connector 7 and fire proof motor armature spindle 3 are coaxially installed, and optical fiber optical grating stress measuring system 9 is connected with host computer 11.According to actual user demand, for the fire proof motor of multi-form structure, the optical fiber optical grating stress sensor 1 that in the present invention, some group switching centre frequencies are different can adopt parallel connection, series connection and/or series-parallel system to connect.
A kind of fire proof motor rotor stress measuring method of the present invention, comprises the following steps:
A: set gradually on rotor first optical fiber optical grating stress sensor 1, second optical fiber optical grating stress sensor 1 ..., the n-th optical fiber optical grating stress sensor 1, and the optical-fibre channel connecting fiber rotary connector 7 utilizing fire proof motor internal transmission optical fiber 4 to arrange in rotor axis of electric n optical fiber optical grating stress sensor 1 rotor-end, and the stator terminal of fiber rotation connector 7 to be connected with the optical fiber optical grating stress measuring system 9 based on wavelength-division multiplex principle by fire proof motor external transmission optical fiber 8; Optical fiber optical grating stress sensor 1 comprises outer field fibre cladding 15, and be fiber core 16 and fiber grating 17 in fibre cladding 15, described fiber grating 17 is positioned at centre, and the two ends of fiber grating 17 are fiber core 16.Fiber rotation connector 7 and fire proof motor armature spindle 3 are coaxially installed.
B: the broadband light utilizing fiber grating 17 stress measurement to produce incides each optical fiber optical grating stress sensor 1 through fire proof motor external transmission optical fiber 8, fiber rotation connector 7 and fire proof motor internal transmission optical fiber 4, and the reflected light signal containing stress information reflected by each optical fiber optical grating stress sensor 1 transfers to optical fiber optical grating stress measuring system 9 through fire proof motor internal transmission optical fiber 4, fiber rotation connector 7 and fire proof motor external transmission optical fiber 8 again;
C: the reflected light signal containing stress information collected by optical fiber optical grating stress measuring system 9, calculates reflected light wavelength variation delta, according to reflected light wavelength variation delta and stress
εfuntcional relationship Δ=
f(
ε), calculate each optical fiber optical grating stress sensor 1 position place fire proof motor rotor stress.
Detect demand according to reality, for the fire proof motor of multi-form structure, the optical fiber optical grating stress sensor 1 that in the present invention, some group switching centre frequencies are different can adopt parallel connection, series connection and/or series-parallel system to connect.Optical fiber optical grating stress measuring system 9 is connected with host computer 11.
Below in conjunction with specific embodiment, the present invention is described further:
As shown in Figure 2, adopt in the present embodiment and be separately positioned on the different optical fiber optical grating stress sensor 1 of the epitrochanterian 5 group switching centre frequencies of fire proof motor, optical fiber optical grating stress sensor 1 can select the MS-01 of Shenzhen T & S Communications Co., Ltd..5 groups of optical fiber optical grating stress sensors 1 are connected by optical fiber splicer, and fiber rotation connector 7 adopts the SNFO-1A of Sen Ruipu Electronics Co., Ltd. of Shenzhen; Optical fiber optical grating stress measuring system 9 adopts the TS-WI-80 8 channel fiber grating sensing analyser of the too time.
Before measurement, 5 MS-01 type optical fiber optical grating stress sensors 1 are installed to the precalculated position on tested rotor surface, and are connected with the rotor-end interface of SNFO-1A type fiber rotation connector 7 by fire proof motor internal transmission optical fiber 4.The stator terminal of fiber rotation connector 7 is connected with TS-WI-80 type fiber grating 17 sensing assays instrument by fire proof motor external transmission optical fiber 8, and TS-WI-80 is connected with computing machine by USB interface.
During measurement, by the broadband light produced in S-WI-80 type fiber grating 17 sensing assays instrument, incide 5 MS-01 type optical fiber optical grating stress sensors 1 through fire proof motor external transmission optical fiber 8, fiber rotation connector 7 and fire proof motor internal transmission optical fiber 4.The spectrum schematic diagram of stress measurement as shown in Figure 4.Spectrum broadband light as depicted in fig. 4-a incides MS-01 type optical fiber optical grating stress sensor 1, and the light identical with the centre frequency of MS-01 type optical fiber optical grating stress sensor 1 is by optical grating reflection, and reflected light spectrum is as shown in Fig. 4-b; The light different from the centre frequency of MS-01 type optical fiber optical grating stress sensor 1 directly through grating, transmission and going out, transmitted spectrum is as shown in Fig. 4-c; The connecting fiber of transmitted light between 5 MS-01 type optical fiber optical grating stress sensors 1 arrives other MS-01 type optical fiber optical grating stress sensor 1.The centre frequency counter stress of MS-01 type optical fiber optical grating stress sensor 1 is responsive, and namely STRESS VARIATION can cause the change of the centre frequency of MS-01 type optical fiber optical grating stress sensor 1, as shown in Fig. 4-d, and reflected light wavelength variation delta and stress
εfuntcional relationship Δ=
f(
ε);
The frequency spectrum of reflected light is measured by S-WI-80 type fiber grating 17 sensing assays instrument, by computer measurement software, spectral change amount is converted to stress, just can obtains each MS-01 type optical fiber optical grating stress sensor 1 position place fire proof motor rotor stress.In the present embodiment, because the centre frequency of 5 the MS-01 type optical fiber optical grating stress sensors 1 selected is different, so be independent of each other each other when spectral measurement, S-WI-80 type fiber grating 17 sensing assays instrument adopts the method for wavelength-division multiplex, measure the spectral change of 5 MS-01 type optical fiber optical grating stress sensors 1 respectively, in conjunction with computer measurement software, just can measure the stress of 5 points on fire proof motor rotor respectively, realize the multiple spot stress measurement of fire proof motor working rotor state.
Below by reference to the accompanying drawings the specific embodiment of the present invention is described; but these explanations can not be understood to limit the scope of the invention; protection scope of the present invention is limited by the claims of enclosing, and any change on the claims in the present invention basis is all protection scope of the present invention.
Claims (10)
1. a fire proof motor rotor stress measurement mechanism, it is characterized in that: comprise the optical fiber optical grating stress sensor that some group switching centre frequencies are different, be arranged on the optical-fibre channel in fire proof motor armature spindle, fiber rotation connector and optical fiber optical grating stress measuring system, some groups of described optical fiber optical grating stress sensors are separately positioned on fire proof motor rotor, fiber rotation connector is arranged on fire proof motor armature spindle one end, the output terminal of some groups of optical fiber optical grating stress sensors connects the input end of fire proof motor internal transmission optical fiber, the rotor-end of the optical-fibre channel connecting fiber rotary connector of output terminal in rotor axis of electric of fire proof motor internal transmission optical fiber, the stator terminal of fiber rotation connector is connected with the optical fiber optical grating stress measuring system based on wavelength-division multiplex principle by fire proof motor external transmission optical fiber.
2. fire proof motor rotor stress measurement mechanism according to claim 1, it is characterized in that: described optical fiber optical grating stress sensor comprises outer field fibre cladding, be fiber core and fiber grating in fibre cladding, described fiber grating is positioned at centre, and the two ends of fiber grating are fiber core.
3. fire proof motor rotor stress measurement mechanism according to claim 1 and 2, is characterized in that: described fiber rotation connector and fire proof motor armature spindle are coaxially installed.
4. fire proof motor rotor stress measurement mechanism according to claim 3, is characterized in that: described optical fiber optical grating stress measuring system is connected with host computer.
5. fire proof motor rotor stress measurement mechanism according to claim 4, is characterized in that: the optical fiber optical grating stress sensor that described some group switching centre frequencies are different adopts parallel connection, series connection and/or series-parallel system to connect.
6. fire proof motor rotor stress measurement mechanism according to claim 5, is characterized in that: described optical-fibre channel comprises and is arranged in fire proof motor armature spindle and the radial hole of conducting and axial hole.
7. a fire proof motor rotor stress measuring method, is characterized in that, comprises the following steps:
A: set gradually on rotor first optical fiber optical grating stress sensor, second optical fiber optical grating stress sensor ..., the n-th optical fiber optical grating stress sensor, and the optical-fibre channel connecting fiber rotary connector utilizing fire proof motor internal transmission optical fiber to arrange in rotor axis of electric n optical fiber optical grating stress sensor rotor-end, and the stator terminal of fiber rotation connector to be connected with the optical fiber optical grating stress measuring system based on wavelength-division multiplex principle by fire proof motor external transmission optical fiber;
B: utilize optical fiber optical grating stress measure produce broadband light incide each optical fiber optical grating stress sensor through fire proof motor external transmission optical fiber, fiber rotation connector and fire proof motor internal transmission optical fiber, and each optical fiber optical grating stress sensor is reflected containing stress information reflected light signal again through fire proof motor internal transmission optical fiber, fiber rotation connector and fire proof motor external transmission Optical Fiber Transmission to optical fiber optical grating stress measuring system;
C: the reflected light signal containing stress information collected by optical fiber optical grating stress measuring system, calculates reflected light wavelength variation delta, according to reflected light wavelength variation delta and stress
εfuntcional relationship Δ=
f(
ε), calculate each optical fiber optical grating stress sensor position place fire proof motor rotor stress.
8. fire proof motor rotor stress measurement mechanism according to claim 7, it is characterized in that: described optical fiber optical grating stress sensor comprises outer field fibre cladding, be fiber core and fiber grating in fibre cladding, described fiber grating is positioned at centre, and the two ends of fiber grating are fiber core.
9. fire proof motor rotor stress measurement mechanism according to claim 8, is characterized in that: described fiber rotation connector and fire proof motor armature spindle are coaxially installed.
10. fire proof motor rotor stress measurement mechanism according to claim 9, is characterized in that: the optical fiber optical grating stress sensor that described some group switching centre frequencies are different adopts parallel connection, series connection and/or series-parallel system to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704400.0A CN104374503B (en) | 2014-11-28 | 2014-11-28 | A kind of fire-proof motor rotor stress measurement apparatus and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704400.0A CN104374503B (en) | 2014-11-28 | 2014-11-28 | A kind of fire-proof motor rotor stress measurement apparatus and measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104374503A true CN104374503A (en) | 2015-02-25 |
| CN104374503B CN104374503B (en) | 2017-01-04 |
Family
ID=52553554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410704400.0A Active CN104374503B (en) | 2014-11-28 | 2014-11-28 | A kind of fire-proof motor rotor stress measurement apparatus and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104374503B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802398A (en) * | 2016-11-02 | 2017-06-06 | 北京信息科技大学 | A kind of detecting apparatus for rotor position based on fiber grating |
| CN112432604A (en) * | 2020-10-30 | 2021-03-02 | 西安近代化学研究所 | Rotary dynamic strain testing system and method for propellant grain winding and wrapping |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56110029A (en) * | 1980-02-05 | 1981-09-01 | Toshiba Corp | Monitoring device for torsion stress of shaft |
| JPS61225613A (en) * | 1985-03-29 | 1986-10-07 | Mitsubishi Electric Corp | Optical measuring instrument |
| CN2775629Y (en) * | 2005-03-18 | 2006-04-26 | 南阳二机石油装备(集团)有限公司 | Optic fiber grating sensing stress detector |
| JP2007297947A (en) * | 2006-04-28 | 2007-11-15 | Kawasaki Heavy Ind Ltd | Fluorescence spectroscopic internal stress inspection device |
| CN102004012A (en) * | 2010-10-29 | 2011-04-06 | 华北电力大学 | Real-time monitoring method for generator unit shafting rotor bearing load |
| CN202073605U (en) * | 2011-04-25 | 2011-12-14 | 广东电网公司电力科学研究院 | Online thermal stress monitoring system for steam turbine rotor of ultrasupercritical unit |
| CN204373817U (en) * | 2014-11-28 | 2015-06-03 | 南阳防爆集团股份有限公司 | A kind of fire proof motor rotor stress measurement mechanism |
-
2014
- 2014-11-28 CN CN201410704400.0A patent/CN104374503B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56110029A (en) * | 1980-02-05 | 1981-09-01 | Toshiba Corp | Monitoring device for torsion stress of shaft |
| JPS61225613A (en) * | 1985-03-29 | 1986-10-07 | Mitsubishi Electric Corp | Optical measuring instrument |
| CN2775629Y (en) * | 2005-03-18 | 2006-04-26 | 南阳二机石油装备(集团)有限公司 | Optic fiber grating sensing stress detector |
| JP2007297947A (en) * | 2006-04-28 | 2007-11-15 | Kawasaki Heavy Ind Ltd | Fluorescence spectroscopic internal stress inspection device |
| CN102004012A (en) * | 2010-10-29 | 2011-04-06 | 华北电力大学 | Real-time monitoring method for generator unit shafting rotor bearing load |
| CN202073605U (en) * | 2011-04-25 | 2011-12-14 | 广东电网公司电力科学研究院 | Online thermal stress monitoring system for steam turbine rotor of ultrasupercritical unit |
| CN204373817U (en) * | 2014-11-28 | 2015-06-03 | 南阳防爆集团股份有限公司 | A kind of fire proof motor rotor stress measurement mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802398A (en) * | 2016-11-02 | 2017-06-06 | 北京信息科技大学 | A kind of detecting apparatus for rotor position based on fiber grating |
| CN112432604A (en) * | 2020-10-30 | 2021-03-02 | 西安近代化学研究所 | Rotary dynamic strain testing system and method for propellant grain winding and wrapping |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104374503B (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104374491A (en) | Explosion-proof motor rotor temperature measuring device and method | |
| CN201885826U (en) | Electromechanical equipment optical fiber online monitoring system | |
| CN103674117B (en) | Measure entirely method and device with weak optical fiber Bragg grating temperature and strain based on Raman scattering simultaneously | |
| CN103591971B (en) | A kind of localization method of fiber grating | |
| CN204007519U (en) | Optical fiber optical grating sensing experiment instrument | |
| CN103532616A (en) | Integrative optical cable fault detection device | |
| CN104454007A (en) | Mine safety early warning system based on multi-fiber-core optical fibers | |
| CN103940360A (en) | Strain monitoring device based on cascade chirped fiber gratings | |
| CN103076108A (en) | Novel power cable conductor temperature measuring sensor based on FBG (fiber bragg grating) | |
| CN204373817U (en) | A kind of fire proof motor rotor stress measurement mechanism | |
| CN101789564A (en) | Installation structure of optical fiber sensor used for contact temperature detection of power switch cabinet | |
| CN204286635U (en) | A kind of fire proof motor temperature of rotor measurement mechanism | |
| CN203519765U (en) | On-line positioning system for wind power plant current collection line faults | |
| CN104374503A (en) | Explosion-proof motor rotor stress measurement device and method | |
| CN202420549U (en) | Transformer multi-parameter fiber on-line monitoring system | |
| CN207036297U (en) | A kind of optical fiber grating temperature-measuring system | |
| CN101975867A (en) | Fiber bragg grating-based rotating speed detection system and detection method thereof | |
| CN203587125U (en) | Positioning system of fiber grating | |
| CN103529318A (en) | Instantaneous temperature rise and transmission loss test system for optical fiber composite low-voltage cable | |
| CN203629716U (en) | Underground power transmission cable joint temperature real time online measuring device | |
| CN206541004U (en) | A kind of motor fluid field and temperature field integrated measurer | |
| CN202281843U (en) | Distributed sensing demodulation system based on tapered fiber gratings | |
| Werneck et al. | Optical fiber sensors | |
| CN206177328U (en) | Optic fibre microcavity sensor demodulating equipment | |
| CN203132737U (en) | Novel power cable conductor temperature measuring sensor based on FBG (fiber Bragg grating) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 473008 No. 1801 Dushan Avenue, Nanyang City, Henan Province Patentee after: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP Co.,Ltd. Address before: 473008 No. 22 Zhongjing North Road, Nanyang, Henan Patentee before: NANYANG EXPLOSION PROTECTION GROUP Co.,Ltd. |
|
| CP03 | Change of name, title or address |