CN108645549A - Distributed fiber grating Rocket tank cylinder section stress measurement system - Google Patents
Distributed fiber grating Rocket tank cylinder section stress measurement system Download PDFInfo
- Publication number
- CN108645549A CN108645549A CN201810436054.0A CN201810436054A CN108645549A CN 108645549 A CN108645549 A CN 108645549A CN 201810436054 A CN201810436054 A CN 201810436054A CN 108645549 A CN108645549 A CN 108645549A
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- CN
- China
- Prior art keywords
- cylinder section
- rocket tank
- tank cylinder
- fiber grating
- measurement system
- 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.)
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- 238000005259 measurement Methods 0.000 title claims abstract description 21
- 239000000835 fiber Substances 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 230000002463 transducing effect Effects 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000005693 optoelectronics Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims 1
- 235000019628 coolness Nutrition 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 239000011888 foil Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000069 prophylactic effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/247—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet using distributed sensing elements, e.g. microcapsules
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
Abstract
The present invention provides one kind being based on distributed fiber grating Rocket tank cylinder section stress measurement system, which is made of Rocket tank stress demodulation part and cylinder section transducing part.Rocket tank cylinder section stress demodulation part is made of ASE light sources, optical circulator, ccd array, FPGA, 1 × 4 photoswitch, fan/radiator, power supply module, Ethernet or usb interface module, host computer；Cylinder section transducing part is made of 4 road FBG sensings, wherein 3 tunnels are strain transducer, 1 tunnel is temperature sensor, is differed per 15 20, road FBG sensor.Present invention employs the installation of the sensor of fiber grating sensing technology, fiber grating demodulation technology, large-sized structural parts and emulation technologies, transducing part has the characteristics that no cable, electromagnetism interference, light-weight, realizes the stress mornitoring of Rocket tank cylinder section inner and outer surfaces.
Description
Technical field
The present invention relates to rocket launcher section stress measurement system, especially distributed fiber grating Rocket tank cylinder section stress to survey
Amount system.
Background technology
Rocket launcher Duan Yousan block central angles are that 120 ° of aluminium alloy siding welding forms, strong to detect the structure after its welding
Degree and stability are often used the stress variation situation that foil gauge measures test point, usually in rocket launcher section applies loading
One tested point of situation will survey the stress in three directions, and a foil gauge can measure the stress in three directions simultaneously.
The measurement of foil gauge is inaccurate, and reacts slower, and each measurement direction of foil gauge will individually connect a circuit,
It measures dozens of point every time to need to connect a large amount of p-wire, electrical wire is around Rocket tank, once solder joint falls off, event occurs
Barrier, investigation are got up relatively difficult.
Invention content
To solve the above problems, the present invention provides a kind of distributed fiber grating Rocket tank cylinder section stress measurement systems
System, including：Rocket tank stress demodulation part and cylinder section transducing part；Rocket tank cylinder section stress demodulation part is by ASE
Light source, optical circulator, ccd array, FPGA, 1 × 4 photoswitch, fan/radiator, power supply module, Ethernet or USB interface mould
Block, host computer composition；The power supply module provides alternating current and direct current, powers for Rocket tank cylinder section stress demodulation part；
The ASE light sources put forward broadband light, and broadband light reaches 1 × 4 photoswitch after circulator, are believed the control of photoswitch by FPGA
Number, timesharing is entered corresponding FBG sensor channel by broadband light, measures the FBG sensor composition Sensor Network of each tested point
Network, 1 × 4 photoswitch, circulator reach FPGA after the light that optical grating reflection is returned is carried out ccd array opto-electronic conversion, filtered,
After amplification, A/D conversion process, data are transmitted to host computer by Ethernet or usb interface module, are converted into optical wavelength and answer
Become, temperature, test data is saved in designated position, carries out further simulation analysis by host computer；The cylinder section transducing part
It is made of 4 road FBG sensings, wherein 3 tunnels are strain transducer, 1 tunnel is temperature sensor, per 15-20, road sensor.
Beneficial effects of the present invention are：
1, small, light-weight, manufacture craft is ripe using fiber-optic grating sensor as the sensor of this system, this
The fiber-optic grating sensor selected in system is the sensor of large-scale production, Pasting, also solderable on object under test surface,
Measurand will not be had an impact in measurement process.
2, fibre optical sensor it is intrinsic it is non-conductive, anti-electromagnetic interference capability is strong, Rocket tank material be aluminium alloy, use optical fiber
The signal of sensor measurement Rocket tank stress variation is more accurate.
3, using the broadbands 80nm ASE light sources, under conditions of connecting multiple sensors all the way, single biography can effectively be widened
The strain measurement range of sensor.
4, the system can complete strain signal transformation, acquisition, storage and real-time display function, can effective prophylactic tria
Structural destruction caused by stress is excessive in the process.
5, gathered data can be stored in designated position by the system, facilitate the simulation and analysis of later stage stress.
Description of the drawings
Fig. 1 is the distributed fiber grating Rocket tank cylinder section stress measurement system of the present invention.
Specific implementation mode
As shown in Figure 1, distributed fiber grating Rocket tank cylinder section stress measurement system of the present invention, including Rocket tank is answered
Power demodulation part and cylinder section transducing part, Rocket tank cylinder section stress demodulation part is by ASE light sources 1, optical circulator 2, ccd array
3, FPGA4,1 × 4 photoswitch 5, fan/radiator 6, power supply module 7, Ethernet or usb interface module 8, host computer 9 form；
Cylinder section transducing part is made of 4 road FBG sensings, wherein No. 3 strain transducers 11,12,13, temperature sensor 10 all the way, per road
15-20 sensor.
Distributed fiber grating Rocket tank cylinder section stress measurement system, maximum operating frequency 5kHz, low-limit frequency 1Hz,
ASE light sources 1 provide the wideband light source of 1525nm-1605nm, and broadband light reaches 1 × 4 photoswitch 5 after circulator 2, passes through
Timesharing is entered corresponding FBG sensor channel by the control signal of FPGA4 pairs of 1 × 4 photoswitch 5, broadband light, measures each wait for
The FBG sensor of measuring point forms sensing network, and the light that 1 × 4 photoswitch 5, circulator 2 return optical grating reflection carries out ccd array 3
FPGA4 is reached after opto-electronic conversion, after the processing such as filtered, amplification, A/D conversions, data pass through Ethernet or usb interface module
8 are transmitted to host computer 9, are converted into optical wavelength and strain, temperature, and test data is saved in designated position by host computer 9, into traveling
The simulation analysis of one step.
ASE light sources 1 are the wideband light source of 1525nm-1605nm, and luminous power 10mW, is equipped with fan and radiator 6 is timely
Temperature is reduced, light source service life is extended.
FPGA4 modules integrated level is high, including driving circuit, filter circuit, amplifying circuit, A/D conversion circuits etc., by photoelectricity
Transformed signal is transmitted to host computer by Ethernet or USB interface 8 after processing, and FPGA4 provides control for photoswitch
Signal.
Power supply module 7 provides 220V alternating currents for host computer 9 and fan/radiator 6, is ASE light sources 1,1 × 4 photoswitch
5, FPGA4, ccd array 3, Ethernet or usb interface module 8 provide 5V direct currents.
The FPGA4 data transmitted are handled, are converted into the physical quantitys such as wavelength or temperature, strain and show in real time by host computer 9
Show；It is arranged by the preservation of display interface, gathered data can be stored in designated position, storage format can be selected as text
Format or Excel formats.
Cylinder section Sensor section, shares four road FBG sensors, is series connection per connection type between sensor all the way.
Cylinder section Sensor section, FBG strain transducers need wavelength caused by removing temperature change to float in data processing
It moves, FBG temperature sensors should be mounted in Rocket tank cylinder section tested point 2cm, the strain transducer near tested point.
Cylinder section transducing part, FBG sensor are encapsulated by the elastic patch of Specialty Design, and Rocket tank cylinder is fixed on
Section tested point surface, selects the mode of welding to fix, and sensor is easy for installation, can directly be tested, and saves time.
Claims (8)
1. a kind of distributed fiber grating Rocket tank cylinder section stress measurement system, which is characterized in that including：Rocket tank cylinder section
Stress demodulation part and cylinder section transducing part；
The Rocket tank cylinder section stress demodulation part is by ASE light sources, circulator, ccd array, FPGA, 1 × 4 photoswitch, wind
Fan/radiator, power supply module, Ethernet or usb interface module, host computer composition；
The power supply module provides alternating current and direct current, powers for Rocket tank cylinder section stress demodulation part；The ASE light sources
Broadband light is provided, broadband light reaches 1 × 4 photoswitch after circulator, passes through the control signal of FPGA pairs of 1 × 4 photoswitch, broadband
Timesharing is entered corresponding FBG sensor channel by light, measure each tested point FBG sensor composition sensing network, 1 × 4
Photoswitch, circulator reach FPGA, filtered, amplification, A/ after the light that optical grating reflection is returned is carried out ccd array opto-electronic conversion
After D conversion process, data are transmitted to host computer by Ethernet or usb interface module, are converted into optical wavelength and strain, temperature,
Test data is saved in designated position by host computer, carries out further simulation analysis；
The cylinder section transducing part is made of 4 road FBG sensings, wherein 3 tunnels are strain transducer, 1 tunnel is temperature sensor, per road
15-20 sensor.
2. distributed fiber grating Rocket tank cylinder section stress measurement system as described in claim 1, which is characterized in that ASE
Light source is the wideband light source of 1525nm-1605nm, luminous power 10mW.
3. distributed fiber grating Rocket tank cylinder section stress measurement system as described in claim 1, which is characterized in that described
Power supply module, while 220V alternating currents and 5V direct currents being provided, wherein host computer and fan/radiator use 220V alternating currents,
ASE light sources, photoswitch, ccd array, FPGA, Ethernet or usb interface module use 5V direct currents.
4. distributed fiber grating Rocket tank cylinder section stress measurement system as described in claim 1, which is characterized in that described
1 × 4 photoswitch provides control signal by FPGA；Fan/the radiator is used for ASE light source fast coolings.
5. distributed fiber grating Rocket tank cylinder section stress measurement system as described in claim 1, which is characterized in that described
Host computer is desktop computer or laptop with ethernet interface.
6. distributed fiber grating Rocket tank cylinder section stress measurement system as described in claim 1, which is characterized in that described
Connection type is series connection between sensor.
7. distributed fiber grating Rocket tank cylinder section stress measurement system as described in claim 1, which is characterized in that described
Strain transducer is encapsulated using elastic patch, is fixed on Rocket tank cylinder section tested point.
8. distributed fiber grating Rocket tank cylinder section stress measurement system as described in claim 1, which is characterized in that described
Temperature sensor is encapsulated using elastic patch, is fixed in Rocket tank cylinder section tested point 2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810436054.0A CN108645549A (en) | 2018-05-09 | 2018-05-09 | Distributed fiber grating Rocket tank cylinder section stress measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810436054.0A CN108645549A (en) | 2018-05-09 | 2018-05-09 | Distributed fiber grating Rocket tank cylinder section stress measurement system |
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| Publication Number | Publication Date |
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| CN108645549A true CN108645549A (en) | 2018-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810436054.0A Pending CN108645549A (en) | 2018-05-09 | 2018-05-09 | Distributed fiber grating Rocket tank cylinder section stress measurement system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964579A (en) * | 2022-07-28 | 2022-08-30 | 煤炭科学技术研究院有限公司 | Mining stress monitoring system based on distributed grating array |
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2018
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| US20130099104A1 (en) * | 2007-10-23 | 2013-04-25 | US Seismic Systems, Inc. | Interrogator having an analog interrogator following at least one amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114964579A (en) * | 2022-07-28 | 2022-08-30 | 煤炭科学技术研究院有限公司 | Mining stress monitoring system based on distributed grating array |
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Application publication date: 20181012 |