CN106597280A - Motor fluid field and temperature field integrated measuring device and method - Google Patents
Motor fluid field and temperature field integrated measuring device and method Download PDFInfo
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- CN106597280A CN106597280A CN201611166285.1A CN201611166285A CN106597280A CN 106597280 A CN106597280 A CN 106597280A CN 201611166285 A CN201611166285 A CN 201611166285A CN 106597280 A CN106597280 A CN 106597280A
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- 239000012530 fluid Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 17
- 239000013307 optical fiber Substances 0.000 claims abstract description 24
- 239000000835 fiber Substances 0.000 claims description 88
- 238000005259 measurement Methods 0.000 claims description 19
- 230000003287 optical effect Effects 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 238000001228 spectrum Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a motor fluid field and temperature field integrated measuring device which comprises a stator core, a rotator arranged on the stator core and an outer housing. The slots between the outer housing and the stator core and between the stator core and the rotor form a motor axial air channel. The slots inside the stator core form a motor radial air channel. The device also comprises multi-channel fluid field optical fiber acquisition modules, multi-channel temperature field optical fiber acquisition modules, a demodulator and a computer. The plurality of the fluid field optical fiber acquisition modules and the temperature field optical fiber acquisition modules are uniformly distributed in the motor axial air channel and the motor radial air channel wherein the signal output ends of the fluid field optical fiber acquisition modules and the temperature field optical fiber acquisition modules are connected with the demodulator; and the signal output end of the demodulator is connected with the signal input end of the computer; the device of the invention is capable of accurately measuring the fluid field and temperature field parameters inside a motor.
Description
Technical field
The present invention relates to Motor Measuring Technology field, more particularly to a kind of motor fluid field and temperature field integrated measuring dress
Put and method.
Background technology
When motor works, internal temperature can be raised so as to insulant accelerated ageing, cause efficiency to reduce, and serious can
Cause electrical fault.The parameter such as temperature and wind pressure and wind speed is important parameter when motor works, the design, research, survey in motor
It is required for measuring its temperature and wind pressure and wind speed in multiple links such as examination and operation.Motor temperature and wind pressure and wind speed measurement set to optimization
Meter, raising performance tool are of great significance.
At present, studies in China mechanism proposes certain methods to motor temperature measurement, mainly there is Shanghai Communications University's electric power
Zhang Zhenhan, Yi Xinqiang of marine integrated power technology science and techniques of defence key lab of naval engineering university of institute et al., adopt
Pt100 critesistor realizes that motor temperature is measured;Either direct measurement or indirect measurement are all the electricity for adopting to said method
Survey method, is easily disturbed by motor internal forceful electric power magnetic environment, and certainty of measurement is not high.
Wu Yihui of Fujian Shuikou Power Generation Group Co., Ltd. et al., using high speed, high-precision infrared temperature-test sensor
Realize the temperature survey of electromotor.But, due to the size of infrared probe it is larger, so middle and small motor cannot be applied to.Separately
Outward, the operating temperature range of infrared temperature sensor is generally less than 60 DEG C, it is impossible to which long-term work is in the electricity with higher temperature
Inside machine.
For the test of motor fluid field, a pine of University Of Chongqing and the fourth power of Zhejiang University establish motor local ventilation and dissipate
Heat test model, and tested using the measuring system being mainly made up of pitot tube and pressure transducer;DEC's east
The Qian Feng of Electric Machine Co., Ltd establishes ventilation model to high-power generator, equally employs and is mainly passed by pitot tube and pressure
The measuring system that sensor is constituted is tested.But, these simulation armies are not the fluid field tests carried out for true motor, only
It is only capable of providing design reference, practical application can not be reached.
At present, existing motor has the multifrequency natures such as little strong electromagnetic, air gap, narrow space, rotor rotation, for anti-
For quick-fried motor, in addition it is also necessary to inside and outside electric signal isolation, various methods such as traditional thermistor temperature detecting, infrared measurement of temperature cannot expire
Sufficient its measurement demand, electric motor temperature field is always a difficult problem for electromechanical testing with fluid field test.
The content of the invention
It is an object of the invention to provide a kind of motor fluid field and temperature field integrated measurer and method, can be accurate
Fluid field inside measurement motor and temperature field parameters.
The technical solution used in the present invention is:
A kind of motor fluid field and temperature field integrated measurer, including stator core, the rotor being installed in stator core
And shell, the gap between shell and stator core, stator core and rotor forms motor axial direction ventilating duct, in stator core
Gap forms motor radial ducts, also including multi-path fluid field collecting fiber module, multi way temperature field collecting fiber module, solution
Instrument and computer, multiple fluid field collecting fiber modules and multiple temperature field collecting fiber modules is adjusted to be evenly distributed on motor axial direction
In ventilating duct and motor radial ducts, the signal of multiple fluid field collecting fiber modules and multiple temperature field collecting fiber modules
Outfan connects (FBG) demodulator, and the signal output part of (FBG) demodulator connects the signal input part of computer, is provided with computer
JPFBGTest test systems.
Include multiple pressure fiber-optic grating sensors, multiple pressure optical fiber grating sensings per road fluid field collecting fiber module
Device is adopted to be connected in series after (FBG) demodulator or parallel connection and connects (FBG) demodulator by fiber coupler;Per road temperature field collecting fiber module
Including multiple Temperature fiber Grating Sensors, multiple pressure fiber-optic grating sensors are adopted and are connected in series after (FBG) demodulator or parallel connection
(FBG) demodulator is connected by fiber coupler.
The mid frequency of each the pressure fiber-optic grating sensor included in described every road fluid field collecting fiber module
It is different;The mid frequency of each Temperature fiber Grating Sensor included in per road temperature field collecting fiber module is different.
Described (FBG) demodulator adopts optical fiber grating sensing analyser.
A kind of measuring method based on motor fluid field and temperature field integrated measurer, comprises the following steps:
A:Multiple collection points are preset on every road motor axial direction ventilating duct and every road motor radial ducts of motor, is adopted at each
A pressure fiber-optic grating sensor and a Temperature fiber Grating Sensor are installed at collection point;
B:The all pressure optical fiber grating sensings that will be arranged on every road motor axial direction ventilating duct or every road motor radial ducts
Device is connected on a channel interface of (FBG) demodulator, Qie Jiangmei roads electricity motor axial direction ventilating duct or often road motor radial ducts
All Temperature fiber Grating Sensors of upper setting are connected on a channel interface of (FBG) demodulator;
C:(FBG) demodulator sends optical signal, reaches each pressure fiber-optic grating sensor through fiber-optic transfer and optical fiber temperature grating is passed
Sensor;
D:Each pressure fiber-optic grating sensor and Temperature fiber Grating Sensor are received after optical signal, by reflective information original road
Feed back to (FBG) demodulator;
E:(FBG) demodulator receives every road motor axial direction ventilating duct or per road motor radial ducts upward pressure optical fiber grating sensing
The optical signal that device and Temperature fiber Grating Sensor are reflected, and signal is changed, is demodulated, measure each pressure light
The mid frequency of fiber grating sensor and Temperature fiber Grating Sensor reflected light signal, and measurement result is transferred to into calculating
Machine;
F:Computer is analyzed and calculating by JPFBGTest Survey Software to spectrum, obtains each pressure fiber grating
Sensor and the temperature and pressure physical quantity of Temperature fiber Grating Sensor position.
The all pressures arranged on the axial ventilating duct of described step B Zhong Mei roads motor or every road motor radial ducts
Power fiber-optic grating sensor is connected to a channel interface of (FBG) demodulator by way of series, parallel or connection in series-parallel are combined
On;The all Temperature fiber Grating Sensors arranged on every road motor axial direction ventilating duct or every road motor radial ducts are led to
The mode for crossing series, parallel or connection in series-parallel combination is connected on a channel interface of (FBG) demodulator.
Each the pressure light that will be arranged on step 6 Zhong Mei roads motor axial direction ventilating duct or every road motor radial ducts
Fiber grating sensor arranges different mid frequencyes;Arrange per road motor axial direction ventilating duct or on the motor radial ducts of every road
Each Temperature fiber Grating Sensor different mid frequencyes are set.
The present invention on every road motor of motor axial direction ventilating duct and every road motor radial ducts by presetting multiple adopting
Collection point, installs a pressure fiber-optic grating sensor and a Temperature fiber Grating Sensor, to collection at each collection point
Point carries out collection while pressure and temperature;Pressure fiber-optic grating sensor and Temperature fiber Grating Sensor are by the light for collecting
Signal.It is sent on a channel interface of (FBG) demodulator;(FBG) demodulator receives every road motor axial direction ventilating duct or per road motor
The optical signal that radial ducts upward pressure fiber-optic grating sensor and Temperature fiber Grating Sensor are reflected, and signal is entered
Row conversion, demodulation, measure the center of each pressure fiber-optic grating sensor and Temperature fiber Grating Sensor reflected light signal
Frequency, and measurement result is transferred to into calculating.(FBG) demodulator sends information to again computer, and computer is surveyed by JPFBGTest
Amount software is analyzed and calculating to spectrum, obtains each pressure fiber-optic grating sensor and Temperature fiber Grating Sensor institute
In the temperature and pressure physical quantity of position.
Description of the drawings
Fig. 1 is the structural representation of the motor fluid field with temperature field integrated measurer of the present invention;
Fig. 2 is method of the present invention flow chart.
Specific embodiment
As shown in figure 1, the present invention includes stator core 2, the rotor 3 being installed in stator core 2 and shell 1, the He of shell 1
Gap between stator core 2, stator core 2 and rotor 3 forms motor axial direction ventilating duct Z, and the gap in stator core 2 is formed
Motor radial ducts J, also including multi-path fluid field collecting fiber module, multi way temperature field collecting fiber module, (FBG) demodulator and
Computer, multiple fluid field collecting fiber modules and multiple temperature field collecting fiber modules are evenly distributed on motor axial direction ventilating duct
In Z and motor radial ducts J, the signal output of multiple fluid field collecting fiber modules and multiple temperature field collecting fiber modules
End connection (FBG) demodulator, the signal output part of (FBG) demodulator connects the signal input part of computer, JPFBGTest is provided with computer
Test program.
Include multiple pressure fiber-optic grating sensors 4 per road fluid field collecting fiber module, multiple pressure fiber gratings are passed
Sensor 4 is adopted to be connected in series after (FBG) demodulator or parallel connection and connects (FBG) demodulator by fiber coupler 6;Per road temperature field collecting fiber
Module includes multiple Temperature fiber Grating Sensors 5, multiple pressure fiber-optic grating sensors 4 using be connected in series (FBG) demodulator or
(FBG) demodulator is connected by fiber coupler 6 after parallel connection.
The mid frequency of each the pressure fiber-optic grating sensor 4 included in described every road fluid field collecting fiber module
It is different;The mid frequency of each Temperature fiber Grating Sensor 5 included in per road temperature field collecting fiber module is different.
Described (FBG) demodulator adopts optical fiber grating sensing analyser.
A kind of measuring method based on motor fluid field and temperature field integrated measurer, comprises the following steps:
A:Multiple collection points are preset on every road motor axial direction ventilating duct Z and every road motor radial ducts J of motor, every
One pressure fiber-optic grating sensor 4 and a Temperature fiber Grating Sensor 5 are installed at individual collection point;Collection point is pressed
Gather while power and temperature;The setting of collection point can according to the actual needs, and the form mark according to coordinate is clear in electricity
Which position of machine, such as, in first radial ducts JJ1 of motor, the 3rd collection point 3 then can be expressed as(J1、
3), the position which group pressure fiber-optic grating sensor 4 and Temperature fiber Grating Sensor 5 is placed, such as, places the 3rd
Group, then be Z3, then the first of motor radial ducts J, and the quantity of information of the 3rd collection point is:(J1、3、Z3), with such
Push away, each collection point is labeled.So mode is easy to computer to calculate after result, can quickly correspond to and find out this knot
Fruit is the data at which position of motor.The present invention carries out the correspondence of data only with this kind of mode, and the present invention is also not only
It is only limitted to this mode.
B:The all pressure optical fiber light that will be arranged on every road motor axial direction ventilating duct Z or every road motor radial ducts J
Gate sensor 4 is connected on a channel interface of (FBG) demodulator, and Qie Jiangmei roads motor axial direction ventilating duct or every road motor are radially
The all Temperature fiber Grating Sensors 5 arranged on ventilating duct J are connected on a channel interface of (FBG) demodulator;
C:(FBG) demodulator sends optical signal, and through fiber-optic transfer each pressure fiber-optic grating sensor 4 and optical fiber temperature grating are reached
Sensor 5;
D:Reflective information original road is sent to demodulation by each pressure fiber-optic grating sensor 4 and Temperature fiber Grating Sensor 5 again
Instrument;
E:(FBG) demodulator receives every road motor axial direction ventilating duct Z or passes per road motor radial ducts J upward pressures fiber grating
The optical signal that sensor 4 and Temperature fiber Grating Sensor 5 are reflected, and signal is changed, is demodulated, measure each pressure
The mid frequency of power fiber-optic grating sensor 4 and the reflected light signal of Temperature fiber Grating Sensor 5, and measurement result is transferred to
Computer;
F:Computer is analyzed and calculating by JPFBGTest Survey Software to spectrum, obtains each pressure fiber grating
Sensor 4 and the temperature and pressure physical quantity of the position of Temperature fiber Grating Sensor 5.
Described step B Zhong Mei roads motor axial direction ventilating duct Z or per road motor radial ducts J on arrange it is all
Pressure fiber-optic grating sensor 4 is connected to a passage of (FBG) demodulator by way of series, parallel or connection in series-parallel are combined and connects
On mouth;The all optical fiber temperature grating sensings that will be arranged on every road motor axial direction ventilating duct or every road motor radial ducts J
Device 5 is connected on a channel interface of (FBG) demodulator by way of series, parallel or connection in series-parallel are combined.
Each pressure that will be arranged on step 6 Zhong Mei roads motor axial direction ventilating duct Z or every road motor radial ducts J
Fiber-optic grating sensor 4 arranges different mid frequencyes;Per road motor axial direction ventilating duct or on every road motor radial ducts J
Each Temperature fiber Grating Sensor 5 for arranging arranges different mid frequencyes.
The operation principle of the present invention is illustrated below in conjunction with the accompanying drawings:
As depicted in figs. 1 and 2, the embodiment of the present invention, fiber-optical grating temperature sensor is passed from two pieces of jade put together light succinum series fibre grating
Sensor, according to test needs, sets the fluid field collecting fiber module of series system all the way and all the way temperature of string and combination
Degree field collecting fiber module, chooses 8 different Temperature fiber Grating Sensors 5 of mid frequency different with 8 mid frequencyes
Pressure fiber-optic grating sensor 4, in actual arrangement operation, can according to circumstances set preset.When constituency parallel way
When, need that these fiber-optic grating sensors are connected in parallel by fiber coupler.(FBG) demodulator selects JPHOTONICS-
16 16 channel fiber grating sensing analysers, install on computers the JPFBGTest Survey Software supporting with it.
Before measurement, connect in a series arrangement 8 pressure fiber-optic grating sensors 4 are installed to into tested motor stator
Precalculated position, and (FBG) demodulator is accessed after connecting by optical fiber;Also, by connected in the way of going here and there and combining 8 temperature
Fiber-optic grating sensor 5 is installed to the precalculated position of tested motor stator, and is demodulated by fine bonder and JPHOTONICS-16
Instrument is connected.JPHOTONICS-16 is connected by network interface with computer.Wherein, pressure fiber-optic grating sensor 4 and temperature light
The connected mode of fiber grating sensor 5 is varied, connected mode not exclusively pointed in this specification, can be according to need
Will, in the case where coincident circuit connects, can adopt.In embodiment, each the pressure fiber grating for connecting in a series arrangement
An optical fiber temperature acquisition module should be also provided with the position of sensor 4, while the pressure and temperature of preset is gathered, equally
, should also be provided with one in the predetermined position of each Temperature fiber Grating Sensor 5 connected in the way of going here and there and combine
Pressure collecting fiber module, but do not show in fig. 2.
During measurement, the wideband light source in JPHOTONICS-16 type (FBG) demodulators sends optical signal, through fiber-optic transfer, reaches
16 fiber-optic grating sensors.8 fluid field fiber-optic grating sensors and 8 temperature field fiber-optic grating sensors receive signal
Afterwards, by collection signal returned in the form of optical signal, optical signal further along backtracking, afterwards, inside (FBG) demodulator
Photoelectric conversion module converts optical signals to the signal of telecommunication, by data acquisition module by the central authorities inside signals collecting to (FBG) demodulator
In processing system, and signal is demodulated, measures the mid frequency of each sensor reflected light signal, and by measurement result
It is transferred to computer.(FBG) demodulator belongs to existing mature technology, will not be described here.
The mid frequency of fiber-optic grating sensor is sensitive to temperature, pressure and other parameters, i.e. temperature, pressure and other parameters change energy
Enough cause the change of fiber-optic grating sensor mid frequency, optical fiber grating sensing is measured by JPHOTONICS-16 types (FBG) demodulator
The mid frequency of device reflected light, and measurement result is passed through into network interface transfers to outer computer, outside computer passes through
JPFBGTest Survey Software is calculated, and mid frequency variable quantity is converted to into the parameters such as temperature and wind pressure and wind speed, it is possible to obtain light
The temperature and wind pressure and wind speed of fiber grating sensor present position.In the present embodiment, because 8 fiber gratings selected per road are passed
The mid frequency of sensor is different, thus the fiber-optic grating sensor in per road each other spectral measurement is independent of each other,
JPHOTONICS-16 types (FBG) demodulator measures respectively the spectral change of 8 fiber-optic grating sensors using the method for wavelength-division multiplex,
With reference to computer JPFBGTest Survey Software, it is possible to the temperature or wind pressure and wind speed of 8 points in difference measurement motor, electricity is realized
The multiple spot fluid field of machine working condition and temperature field measurement.JPFBGTest e measurement technologies belong to existing mature technology, and here is not
Repeat again.
Claims (7)
1. a kind of motor fluid field and temperature field integrated measurer, including stator core, it is installed on turning in stator core
Son and shell, the gap between shell and stator core, stator core and rotor forms motor axial direction ventilating duct, in stator core
Gap formed motor radial ducts, it is characterised in that:Also include multi-path fluid field collecting fiber module, multi way temperature field light
Fine acquisition module, (FBG) demodulator and computer, multiple fluid field collecting fiber modules and multiple temperature field collecting fiber modules it is uniform
It is distributed in motor axial direction ventilating duct and motor radial ducts, multiple fluid field collecting fiber modules and multiple temperature field optical fiber
The signal output part connection (FBG) demodulator of acquisition module, the signal output part of (FBG) demodulator connects the signal input part of computer, calculates
JPFBGTest test systems are installed in machine.
2. motor fluid field according to claim 1 and temperature field integrated measurer, it is characterised in that:Per road fluid
Field collecting fiber module includes multiple pressure fiber-optic grating sensors, and multiple pressure fiber-optic grating sensors are adopted and are connected in series solution
Adjust and (FBG) demodulator is connected by fiber coupler after instrument or parallel connection;Include multiple optical fiber temperatures per road temperature field collecting fiber module
Grating sensor, multiple pressure fiber-optic grating sensors are adopted to be connected in series after (FBG) demodulator or parallel connection and connected by fiber coupler
Connect (FBG) demodulator.
3. motor fluid field according to claim 2 and temperature field integrated measurer, it is characterised in that:Described is every
The mid frequency of each the pressure fiber-optic grating sensor included in the fluid field collecting fiber module of road is different;Per road temperature field light
The mid frequency of each Temperature fiber Grating Sensor included in fine acquisition module is different.
4. motor fluid field according to claim 3 and temperature field integrated measurer and method, it is characterised in that:Institute
The (FBG) demodulator stated adopts optical fiber grating sensing analyser.
5. a kind of measuring method based on motor fluid field and temperature field integrated measurer, it is characterised in that:Including following
Step:
A:Multiple collection points are preset on every road motor axial direction ventilating duct and every road motor radial ducts of motor, is adopted at each
A pressure fiber-optic grating sensor and a Temperature fiber Grating Sensor are installed at collection point;
B:The all pressure optical fiber grating sensings that will be arranged on every road motor axial direction ventilating duct or every road motor radial ducts
Device is connected on a channel interface of (FBG) demodulator, Qie Jiangmei roads electricity motor axial direction ventilating duct or often road motor radial ducts
All Temperature fiber Grating Sensors of upper setting are connected on a channel interface of (FBG) demodulator;
C:(FBG) demodulator sends optical signal, reaches each pressure fiber-optic grating sensor through fiber-optic transfer and optical fiber temperature grating is passed
Sensor;
D:Each pressure fiber-optic grating sensor and Temperature fiber Grating Sensor are received after optical signal, by reflective information original road
Feed back to (FBG) demodulator;
E:(FBG) demodulator receives every road motor axial direction ventilating duct or per road motor radial ducts upward pressure optical fiber grating sensing
The optical signal that device and Temperature fiber Grating Sensor are reflected, and signal is changed, is demodulated, measure each pressure light
The mid frequency of fiber grating sensor and Temperature fiber Grating Sensor reflected light signal, and measurement result is transferred to into calculating
Machine;
F:Computer is analyzed and calculating by JPFBGTest Survey Software to spectrum, obtains each pressure fiber grating
Sensor and the temperature and pressure physical quantity of Temperature fiber Grating Sensor position.
6. the measuring method based on motor fluid field and temperature field integrated measurer according to claim 7, it is special
Levy and be:The all pressures arranged on the axial ventilating duct of described step B Zhong Mei roads motor or every road motor radial ducts
Power fiber-optic grating sensor is connected to a channel interface of (FBG) demodulator by way of series, parallel or connection in series-parallel are combined
On;The all Temperature fiber Grating Sensors arranged on every road motor axial direction ventilating duct or every road motor radial ducts are led to
The mode for crossing series, parallel or connection in series-parallel combination is connected on a channel interface of (FBG) demodulator.
7. the measuring method based on motor fluid field and temperature field integrated measurer according to claim 6, it is special
Levy and be:Each the pressure light that will be arranged on step 6 Zhong Mei roads motor axial direction ventilating duct or every road motor radial ducts
Fiber grating sensor arranges different mid frequencyes;Arrange per road motor axial direction ventilating duct or on the motor radial ducts of every road
Each Temperature fiber Grating Sensor different mid frequencyes are set.
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CN104180922A (en) * | 2014-08-21 | 2014-12-03 | 中国计量学院 | Power generator stator iron core temperature detection system and method based on optical fiber sensor |
CN104374491A (en) * | 2014-11-28 | 2015-02-25 | 南阳防爆集团股份有限公司 | Explosion-proof motor rotor temperature measuring device and method |
CN206541004U (en) * | 2016-12-16 | 2017-10-03 | 卧龙电气集团股份有限公司 | A kind of motor fluid field and temperature field integrated measurer |
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- 2016-12-16 CN CN201611166285.1A patent/CN106597280A/en active Pending
Patent Citations (6)
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CN102128653A (en) * | 2010-12-29 | 2011-07-20 | 上海华魏光纤传感技术有限公司 | Distributed optical fiber flow measuring device and method |
US20120279313A1 (en) * | 2011-05-05 | 2012-11-08 | Diatzikis Evangelos V | Fluid flow velocity and temperature measurement |
CN103582820A (en) * | 2011-05-05 | 2014-02-12 | 西门子能源有限公司 | Fluid flow velocity and temperature measurement |
CN104180922A (en) * | 2014-08-21 | 2014-12-03 | 中国计量学院 | Power generator stator iron core temperature detection system and method based on optical fiber sensor |
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Application publication date: 20170426 |