CN109060205A - Dock crane stress monitoring system and method based on fiber grating strain induction - Google Patents
Dock crane stress monitoring system and method based on fiber grating strain induction Download PDFInfo
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- CN109060205A CN109060205A CN201811280277.9A CN201811280277A CN109060205A CN 109060205 A CN109060205 A CN 109060205A CN 201811280277 A CN201811280277 A CN 201811280277A CN 109060205 A CN109060205 A CN 109060205A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 54
- 230000006698 induction Effects 0.000 title claims abstract description 51
- 239000000835 fiber Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 230000003287 optical effect Effects 0.000 claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 8
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 7
- 239000013307 optical fiber Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
Classifications
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- 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 a kind of dock crane stress monitoring system and method based on fiber grating strain induction, the monitoring method is the following steps are included: step 1, Fiber Bragg Grating Sensor Array is set on the surface of dock crane, distributes an ID coding to detection sensor each in Fiber Bragg Grating Sensor Array；Step 2 obtains the optical signal that all detection sensors generate in Fiber Bragg Grating Sensor Array, and optical signal is carried out demodulation and obtains electric signal；Step 3 analyzes processing to electric signal and obtains ess-strain information；Step 4 encodes display ess-strain information according to ID.
Description
Technical field
The present invention relates to engineering instrument stress monitoring technical fields, and in particular to it is a kind of based on fiber grating strain induction
Dock crane stress monitoring system and method.
Background technique
Gantry crane on board is made as a kind of important material conveyance equipment, the important function in shipbuilding field is increasingly convex
It is aobvious.In the use process of gantry crane equipment, metal structure can gradually be influenced by corrosion, wear etc. and is deformed, by force
Degree and rigidity decline therewith.It needs that dock crane is detected and maintained often in daily production, at present many shipyards
" time-based maintenance, correction maintenance " traditional approach is still continued to use regularly to overhaul crane.This maintenance mode can only obtain
Know the situation under specific non-production state, can not reflect situation of the crane under entire working condition, there are safety
Hidden danger.Further, since traditional approach generally requires to carry out maintenance down, spend human and material resources, maintenance cost is high.
Summary of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of incuded based on fiber grating strain
Dock crane stress monitoring system and method, the stress data of real-time monitoring dock crane.
Dock crane stress monitoring method provided by the invention based on fiber grating strain induction, has such spy
Sign, comprising the following steps: step 1 is arranged Fiber Bragg Grating Sensor Array on the surface of dock crane, passes to fiber grating
Each detection sensor distributes an ID coding in sensor array；Step 2 obtains all inspections in Fiber Bragg Grating Sensor Array
The optical signal that sensor generates is surveyed, optical signal is subjected to demodulation and obtains electric signal；Step 3 answers electric signal analysis processing
Stress-strain information；Step 4 encodes display ess-strain information according to ID.
In the dock crane stress monitoring method provided by the invention based on fiber grating strain induction, can also have
There is such feature: where Fiber Bragg Grating Sensor Array is set in step 1 specifically: the structural member quantity of dock crane
It is set as n, the surface of each structural member is divided into k characteristic area according to surface shape and surface area, and each characteristic area is provided with
At least one induction site is arranged n optical cable branch line according to n structural member of dock crane, connects j on every optical cable branch line
A detection sensor, j >=k, detection sensor are correspondingly arranged on induction site.
In the dock crane stress monitoring method provided by the invention based on fiber grating strain induction, can also have
There is such feature: where wherein, specific following steps are handled to the analysis of electric signal in step 3: step 1, by step 2
The electric signal voltage signal output of acquisition；Step 2, voltage signal is subjected to analog-to-digital conversion and obtains digital signal；Step 3, root
The digital signal in all induction sites of same time point is obtained according to ID coding and is arranged, using arrangement result as shipbuilding lifting
The Stress distribution of machine at the time point；Step 4, believed according to all historical figures that ID coding obtains same induction site
Number；Step 5, using Stress distribution and historical figures signal as ess-strain information.
In the dock crane stress monitoring method provided by the invention based on fiber grating strain induction, can also have
There is such feature: where also corresponding in Fiber Bragg Grating Sensor Array that temperature-compensating corresponding with detection sensor is set
Sensor is electric signal according to the optical signal demodulation that step 2 generates temperature compensation sensor, according to the step in step 3
1, the Electric signal processing of temperature compensation sensor is that digital signal passes before carrying out step 3 according to temperature-compensating by step 2
Sensor digital signal amendment detection sensor digital signal, and according to after amendment detection sensor digital signal carry out after
Continuous step 3,4,5.
In the dock crane stress monitoring method provided by the invention based on fiber grating strain induction, can also have
There is such feature: where after Fiber Bragg Grating Sensor Array is set, three-dimensional emulation mould also is established to dock crane
Induction site of the ID coding in three-dimensional simulation model is associated with by type one by one；According in three-dimensional simulation model
ID coding display ess-strain information.
The present invention also provides a kind of dock crane stress monitoring systems based on fiber grating strain induction, have in this way
Feature, comprising: Fiber Bragg Grating Sensor Array includes a plurality of optical cable branch corresponding with multiple structural members of dock crane
Line, every optical cable branch line are connected with multiple detection sensors, and detection sensor is attached at the surface of structural member；Fiber grating demodulation
Instrument is connect with Fiber Bragg Grating Sensor Array, has multiple optical interfaces, and multiple optical interfaces are connected respectively a plurality of optical cable
Branch line；Live host, connect with fiber Bragg grating (FBG) demodulator；And monitoring computer, it is connect with live main-machine communication.
In the dock crane stress monitoring system provided by the invention based on fiber grating strain induction, can also have
Such feature: where the surface adhesion of structural member has adhesive layer, and detection sensor is embedded to the inside of adhesive layer.
In the dock crane stress monitoring system provided by the invention based on fiber grating strain induction, can also have
Such feature: where detection sensor connects temperature compensation sensor, the non-table for being attached at structural member of temperature compensation sensor
Face.
In the dock crane stress monitoring system provided by the invention based on fiber grating strain induction, can also have
Such feature: where using length scanning type optical fiber laser as light source in fiber Bragg grating (FBG) demodulator.
In the dock crane stress monitoring system provided by the invention based on fiber grating strain induction, can also have
Such feature: where live host and monitoring computer connect for wireless communication, and live host is connected with wireless launcher,
Wireless bridge is provided between live host and monitoring computer, monitoring computer is connected with radio receiver.
Action and effect of the invention:
Dock crane stress monitoring system and method based on fiber grating strain induction of the invention, can pass through optical fiber
The structural member surface ess-strain third contact of a total solar or lunar eclipse signal of grating sensor array induction dock crane, through optical fiber field host (FBG) demodulator
It is demodulated into electric signal.It is handled using live host analysis, obtains Stress distribution situation and all historical figures signals.To
The structural member surface ess-strain information of dock crane can be monitored on host and monitoring computer in real time at the scene, it is real
Acquisition production status flowering structure part surface stress situation is showed and can monitor in real time, avoiding traditional periodic inspection could obtain
The problem of stress situation, facilitates the situation that monitoring personnel knows crane according to real-time monitoring stress variation data at any time.
In addition, will be warm in the dock crane stress monitoring system and method for the invention based on fiber grating strain induction
The digital signal of the digital signal amendment detection sensor of degree compensation sensor acquisition, compensation temperature is to acquisition stress-strain data
Influence.
Detailed description of the invention
Fig. 1 is showing for the dock crane stress monitoring system based on fiber grating strain induction in the embodiment of the present invention
It is intended to；
Fig. 2 is showing for the dock crane stress monitoring method based on fiber grating strain induction in the embodiment of the present invention
It is intended to.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to make specifically the dock crane stress monitoring system and method incuded the present invention is based on fiber grating strain
It illustrates.
As shown in Figure 1, the dock crane stress monitoring system 100 based on fiber grating strain induction in the present embodiment wraps
It includes: Fiber Bragg Grating Sensor Array 10, fiber Bragg grating (FBG) demodulator 20, live host 30, wireless launcher 40, wireless bridge
50, radio receiver 60, monitoring computer 70.
Fiber Bragg Grating Sensor Array 10 includes the portal-framed structure, big mechanism of car, trolley body, raising with dock crane
The corresponding a plurality of optical cable branch line 11 of multiple structural members such as mechanism, every optical cable branch line 11 are connected with multiple detection sensor 11a, inspection
Survey the surface that sensor 11a is attached at structural member.Each structural member according to shape and surface area can surface be divided into multiple spies
Area is levied, for example, portal-framed structure can be divided into top gantry characteristic area, cantilevered feature area, leg aspect area, lower beam feature
Area is arranged multiple induction sites in each characteristic area, a detection sensor 11a is arranged on each induction site, incudes at site
Be stained with adhesive layer, detection sensor 11a is embedded to the inside of adhesive layer, adhesive layer with a thickness of 2.8mm~3.5mm, it is ensured that it is viscous
Effect is connect, while also guaranteeing good sensing effect, does not interfere with the induction of sensor.In the present embodiment, detection sensor
11a connection temperature compensation sensor (not illustrating in figure), the non-surface for being attached at structural member of temperature compensation sensor, detection sensing
Device 11a and temperature compensation sensor are FBG sensor, influence of the compensation temperature to detection sensor 11a.
Fiber Bragg grating (FBG) demodulator 20 has multiple optical interfaces, and optical cable branch line 11 passes through FC/APC optic splice and optical fiber light
Multiple optical interfaces of grid (FBG) demodulator 20 match grafting.Fiber Bragg grating (FBG) demodulator 20 is made using length scanning type optical fiber laser
For light source, realization multi-pass signal acquires in real time and optical path signal gain.The light letter that Fiber Bragg Grating Sensor Array 10 acquires
Number electric signal is demodulated into through fiber Bragg grating (FBG) demodulator 20.Fiber Bragg grating (FBG) demodulator 20 embeds FPGA hardware logic chip, using shape
The software architecture of state machine and recurrence event structure mutual coupling.
Live host 30 is connect with fiber Bragg grating (FBG) demodulator 20 by cable.Analysis processing telecommunications is provided in live host
Number software run program, show ess-strain information on host 30 at the scene after analysis processing, for operator's reality at scene
When check.
Monitoring computer 70 and live host 30 are wireless communication connection, realize that monitoring indoor staff's real time inspection rises
Heavy-duty machine surface stress strained situation.Live host 30 is connected with wireless launcher 40, for emitting wireless signal.Live host
Wireless bridge 50 is provided between 30 and monitoring computer 70, the transfer for wireless signal.Monitoring computer 70, which is connected with, wirelessly to be connect
Receiving apparatus 60, for receiving wireless signal, radio receiver 60 uses wireless AP devices in the present embodiment.
As shown in Fig. 2, being applied to the dock crane stress monitoring system incuded based on fiber grating strain in the present embodiment
System 100 monitoring method the following steps are included:
Step 1: Fiber Bragg Grating Sensor Array is set on the surface of dock crane, by the structural member of dock crane
Quantity is set as n, and the surface of each structural member is divided into k characteristic area according to surface shape and surface area, and each characteristic area is set
It is equipped at least one detection induction site and the adjacent and quantity consistent temperature-compensating induction site with detection induction site location,
N optical cable branch line is set according to n structural member of dock crane, connects j detection sensor and j on every optical cable branch line
Temperature compensation sensor, j >=k, detection sensor are correspondingly arranged on detection induction site, and temperature compensation sensor is correspondingly arranged
On temperature-compensating induction site.
After Fiber Bragg Grating Sensor Array is arranged, to detection sensor distribution one each in Fiber Bragg Grating Sensor Array
A first ID coding distributes a 2nd ID coding, the first ID coding and the 2nd ID coding one to each temperature compensation sensor
One association.After Fiber Bragg Grating Sensor Array is set, while three-dimensional simulation model is established to dock crane and is stored
At the scene on host and monitoring computer, induction site of the first ID coding in three-dimensional simulation model is associated with one by one.
Step 2: all detection sensors and all temperature compensation sensors in Fiber Bragg Grating Sensor Array are obtained and is generated
Optical signal, by optical signal carry out demodulation obtain electric signal.
Step 3: analyzing processing to electric signal and obtain ess-strain information, specific following steps:
Step 1, electric signal voltage signal output step 2 obtained.
Step 2, voltage signal is subjected to analog-to-digital conversion and obtains digital signal.
Before carrying out step 3, according to the corresponding relationship of the 2nd ID coding and the first ID coding, sensed using temperature-compensating
The digital signal of the digital signal amendment detection sensor of device, and it is subsequent according to the digital signal progress of detection sensor after amendment
Step.
Step 3, the digital signal in all induction sites of same time point is obtained according to the first ID coding and arranged, it will
Stress distribution of the result of arranging as dock crane at the time point.
Step 4, all historical figures signals in same induction site are obtained according to the first ID coding.
Step 5, using Stress distribution and historical figures signal as ess-strain information.
Step 4: it is answered on host and monitoring computer according to the ID coding display stress in three-dimensional simulation model at the scene
Become information.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (10)
1. a kind of dock crane stress monitoring method based on fiber grating strain induction, which is characterized in that including following step
It is rapid:
Step 1 is arranged Fiber Bragg Grating Sensor Array on the surface of dock crane, gives the Fiber Bragg Grating Sensor Array
In each detection sensor distribute an ID coding；
Step 2 obtains the optical signal that all detection sensors generate in the Fiber Bragg Grating Sensor Array, the light is believed
It number carries out demodulation and obtains electric signal；
Step 3 analyzes processing to the electric signal and obtains ess-strain information；
Step 4 shows the ess-strain information according to ID coding.
2. the dock crane stress monitoring method according to claim 1 based on fiber grating strain induction, feature
It is:
Wherein, the Fiber Bragg Grating Sensor Array is set in the step 1 specifically:
The structural member quantity of the dock crane is set as n, and the surface of each structural member is according to surface shape and surface
Product is divided into k characteristic area, and each characteristic area is provided at least one induction site,
N optical cable branch line is set according to n structural member of the dock crane, connects j institute on every optical cable branch line
Detection sensor, j >=k are stated, the detection sensor is correspondingly arranged on the induction site.
3. the dock crane stress monitoring method according to claim 2 based on fiber grating strain induction, feature
It is:
Wherein, specific following steps are handled to the analysis of the electric signal in step 3:
Step 1, electric signal voltage signal output step 2 obtained；
Step 2, the voltage signal is subjected to analog-to-digital conversion and obtains digital signal；
Step 3, the digital signal in all induction sites of same time point is obtained according to ID coding and arranged, by result of arranging
As the Stress distribution of the dock crane at the time point；
Step 4, all historical figures signals in same induction site are obtained according to ID coding；
Step 5, using the Stress distribution and the historical figures signal as the ess-strain information.
4. the dock crane stress monitoring method according to claim 3 based on fiber grating strain induction, feature
It is:
Wherein, also corresponding in the Fiber Bragg Grating Sensor Array that temperature-compensating biography corresponding with the detection sensor is set
Sensor,
It is electric signal according to the optical signal demodulation that step 2 generates the temperature compensation sensor,
According in step 3 step 1, step 2 by the Electric signal processing of the temperature compensation sensor be digital signal,
Before carrying out step 3, the number of the detection sensor is corrected according to the digital signal of the temperature compensation sensor
Signal, and subsequent step 3,4,5 are carried out according to the digital signal of detection sensor described after amendment.
5. the dock crane stress monitoring method according to claim 2 based on fiber grating strain induction, feature
It is:
Wherein, after the Fiber Bragg Grating Sensor Array is set, three-dimensional emulation mould also is established to the dock crane
The induction site of the ID coding in the three-dimensional simulation model is associated with by type one by one；
According to the ID coding display ess-strain information in the three-dimensional simulation model.
6. a kind of dock crane stress monitoring system based on fiber grating strain induction characterized by comprising
Fiber Bragg Grating Sensor Array includes a plurality of optical cable branch line corresponding with multiple structural members of dock crane, every institute
It states optical cable branch line and is connected with multiple detection sensors, the detection sensor is attached at the surface of the structural member；
Fiber Bragg grating (FBG) demodulator is connect with the Fiber Bragg Grating Sensor Array, has multiple optical interfaces, multiple optics
Interface is connected respectively a plurality of optical cable branch line；
Live host is connect with the fiber Bragg grating (FBG) demodulator；And
Monitoring computer is connect with the live main-machine communication.
7. the dock crane stress monitoring system based on fiber grating strain induction stated according to claim 6, feature exist
In:
Wherein, the surface adhesion of the structural member has adhesive layer, and the detection sensor is embedded to the inside of the adhesive layer.
8. the dock crane stress monitoring system according to claim 6 based on fiber grating strain induction, feature
It is:
Wherein, the detection sensor connects temperature compensation sensor, and the temperature compensation sensor is non-to be attached at the structure
The surface of part.
9. the dock crane stress monitoring system according to claim 6 based on fiber grating strain induction, feature
It is:
Wherein, use length scanning type optical fiber laser as light source in the fiber Bragg grating (FBG) demodulator.
10. the dock crane stress monitoring system according to claim 6 based on fiber grating strain induction, feature
It is:
Wherein, the live host and the monitoring computer are wireless communication connection,
The scene host is connected with wireless launcher,
It is provided with wireless bridge between the scene host and the monitoring computer,
The monitoring computer is connected with radio receiver.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811280277.9A CN109060205A (en) | 2018-10-31 | 2018-10-31 | Dock crane stress monitoring system and method based on fiber grating strain induction |
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| CN201811280277.9A CN109060205A (en) | 2018-10-31 | 2018-10-31 | Dock crane stress monitoring system and method based on fiber grating strain induction |
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Cited By (3)
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| WO2020198700A1 (en) * | 2019-03-27 | 2020-10-01 | Etrack Tech, Inc. | Systems and methods for non-invasive equipment monitoring |
| CN111930161A (en) * | 2020-06-12 | 2020-11-13 | 杭州奥创光子技术有限公司 | Simulation control method and system for laser |
| 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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