CN203940886U - A kind of space two-dimensional three-dimensional stress strain monitoring platform - Google Patents
A kind of space two-dimensional three-dimensional stress strain monitoring platform Download PDFInfo
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- CN203940886U CN203940886U CN201420310649.9U CN201420310649U CN203940886U CN 203940886 U CN203940886 U CN 203940886U CN 201420310649 U CN201420310649 U CN 201420310649U CN 203940886 U CN203940886 U CN 203940886U
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Abstract
The utility model discloses a kind of space two-dimensional three-dimensional stress strain monitoring platform, comprise information collecting device, optical fiber monitoring device, line concentrating case and be arranged on the space two-dimensional three-dimensional stress strain transducer in structure to be measured; The ess-strain information of space two-dimensional three-dimensional stress strain transducer for producing under the effect of perception construction extraneous factor to be measured; Optical fiber monitoring device is connected with space two-dimensional three-dimensional stress strain transducer by line concentrating case, treats geodesic structure body and monitors; Information collecting device is connected with optical fiber monitoring device, for catching with storing fiber optic Monitoring Data and monitoring information being shown.The utility model compact conformation, functional reliability are high, have the advantages such as simple, monitoring cost is low, work efficiency is high, engineering adaptability is strong of laying; The sensor adopting in the utility model has the advantages such as integrated and miniaturization concurrently, and measuring accuracy is high, long service life, can avoid extraneous and destroy, and increases the engineering adaptability under varying environment.
Description
Technical field
The utility model relates to the monitoring device of water conservancy and field of civil engineering, is specifically related to a kind of space two-dimensional three-dimensional stress strain monitoring platform.
Background technology
Along with the growth of tenure of use, a lot of great water conservancies and civil engineering work can inevitably suffer the impacts such as the performance degradation of material own, adverse environment load action, very easily cause that engineering structure military service condition is abnormal.If can not monitor in time and find above-mentioned variation, very likely cause the generation of some catastrophic event.In China, along with the construction of a large amount of civilian military engineerings, the Safety monitoring meaning of important engineering and great structure becomes very great, therefore, need to develop the monitoring device that a kind of measurement range is large and reliability is high.
Utility model content
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of space two-dimensional three-dimensional stress strain monitoring platform.
Technical scheme: for solving the problems of the technologies described above, space two-dimensional three-dimensional stress strain monitoring platform of the present utility model, comprises information collecting device, optical fiber monitoring device, line concentrating case and be arranged on the space two-dimensional three-dimensional stress strain transducer in structure to be measured; The ess-strain information of described space two-dimensional three-dimensional stress strain transducer for producing under the effect of perception construction extraneous factor to be measured; Described optical fiber monitoring device is connected with described space two-dimensional three-dimensional stress strain transducer by line concentrating case, treats geodesic structure body and monitors; Described information collecting device is connected with described optical fiber monitoring device, for catching with storing fiber optic Monitoring Data and monitoring information being shown.
Described two-dimentional three-dimensional stress strain transducer comprises discoid basal disc, be arranged on groove, fixture, distance scale, angle scale, the packaging part of the inside circumference of basal disc and be positioned at the port wire jumper at optical fiber two ends; Described fixture is arranged in the circle centre position and groove of basal disc, for fixed fiber, moves towards; Described distance scale arranges through the center of circle of basal disc, for calibrating instrument internal optical fiber overall length and go up different length along the line; Described angle scale is arranged on described slot wedge place, is used for different directions and the angle of mark optical fiber; Described packaging part covers described basal disc top, by the top of fixture, fixes; Described port wire jumper stretches out respectively basal disc and is connected with external devices.
Described space two-dimensional three-dimensional stress strain transducer uses the mode of series connection to be laid in structure to be measured.
Beneficial effect: space two-dimensional three-dimensional stress strain monitoring platform of the present utility model, compact conformation, functional reliability are high, have the advantages such as simple, monitoring cost is low, work efficiency is high, engineering adaptability is strong of laying; The space two-dimensional three-dimensional stress strain transducer adopting in the utility model has the advantages such as integrated and miniaturization concurrently, and measuring accuracy is high, long service life, adopts encapsulating structure protective device to avoid extraneous and destroys, and increases the engineering adaptability under varying environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of space two-dimensional three-dimensional stress strain monitoring platform of the present utility model;
Fig. 2 is the structural representation of space two-dimensional three-dimensional stress strain transducer in Fig. 1;
Fig. 3 is the structural representation of space two-dimensional three-dimensional stress strain monitoring platform in embodiment;
Fig. 4 is PPP-BOTDA technical schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As depicted in figs. 1 and 2, space two-dimensional three-dimensional stress strain monitoring platform of the present utility model, comprises information collecting device 1, optical fiber monitoring device 2, line concentrating case 3 and is arranged on the space two-dimensional three-dimensional stress strain transducer 4 in structure 5 to be measured; The ess-strain information that space two-dimensional three-dimensional stress strain transducer 4 produces under extraneous factor effect for perception structure 5 to be measured; Optical fiber monitoring device 2 is connected with space two-dimensional three-dimensional stress strain transducer 4 by line concentrating case 3, treats geodesic structure body 5 and carries out distributed monitoring; Information collecting device 1 is connected with optical fiber monitoring device 2, for catching with storing fiber optic Monitoring Data and monitoring information being shown.
In the present embodiment, space two-dimensional three-dimensional stress strain transducer 4 comprises discoid basal disc 17, be arranged on the groove 18 of the inside circumference of basal disc 17, fixture 19, distance scale 21, angle scale 22, packaging part 23 and be positioned at the port wire jumper 24 at optical fiber 20 two ends; Fixture 19 is arranged in the circle centre position and groove 18 of basal disc 17, for fixed fiber 20 trends; Distance scale 21 arranges through the center of circle of basal disc 17, for calibrating instrument internal optical fiber 20 overall lengths and go up different length along the line; Angle scale 22 is arranged on groove 18 edges, is used for different directions and the angle of mark optical fiber 20; Packaging part 23 covers basal disc 17 tops, by the top of fixture 19, fixes, and jointly completes the object of encapsulation, and then reaches protective device and avoid extraneous and destroy, and increases the engineering adaptability under varying environment; Port wire jumper 24 stretches out respectively basal disc 17 and is connected with line concentrating case 3.Space two-dimensional three-dimensional stress strain transducer 4 uses the mode of series connection to be laid in structure 5 to be measured.
Below, will take SMF-28e general single mode fiber as example, the concrete operational version of space two-dimensional three-dimensional stress strain monitoring platform of the present utility model is described, but the use of this platform be not limited to this.
As shown in Figure 3, the ess-strain information that space two-dimensional three-dimensional stress strain transducer 4 produces under extraneous factor effect for perception structure 5 to be measured, by line concentrating case 3, is pooled to optical fiber monitoring device 2, then by information collecting device 1.As shown in Figure 4, used two-dimentional three-dimensional stress strain transducer 4 is used to pre-pumping pulse technology, can obtain the Brillouin shift Distribution Value of optical fiber 20 in structure 5 to be measured (being SMF-28e general single mode fiber) each point, due to its with cause that the strain of its variation and temperature have linear relationship, can utilize this point oppositely to solve its strain and temperature conditions.In space two-dimensional three-dimensional stress strain transducer 4, fixture 19 is arranged on and in the circle centre position of basal disc 17 and groove 18, fixes optical fiber 20 trends, distance scale 21 is laid through the center of circle of basal disc 17, be used for demarcating its upper different length along the line, angle scale 22 is arranged on described groove 18 edges, is used for different directions and the angle of mark optical fiber 20; Basal disc 17 tops are packaging part 23, and protective device is avoided extraneous and destroyed, and port wire jumper 24 stretches out outside basal disc 17.
Optical fiber monitoring device 2 comprises signal handling equipment 6, pump light source 7, optoelectronic multiplex switch 8, amplifier 9, light path control equipment 10, probe source 11, partially controls equipment 12, the first photodetector 13, the second photodetector 14, the 3rd photodetector 16 and measure device 15 for clocking capability, the signal connection end mouth E of described signal handling equipment 6 and signal connection end mouth F are connected respectively the light input end mouth of pump light source 7 and probe source 11, realize frequency and the performance number of the light signal of modulated pumping light source and probe source; The light signal output end mouth of pump light source 7 connects optoelectronic multiplex switch 8 and amplifier 9 and light path control equipment 10 input ports successively, by line concentrating case 3, is connected with the initial end wire jumper connectivity port of the optical fiber 20 of current monitoring in fibre-optical sensing device 5; The optical output port of probe source connects the input port of inclined to one side control equipment 12, by line concentrating case 3, is connected with another wire jumper connectivity port of end of the optical fiber 20 of current monitoring in fibre-optical sensing device 5; The signal input part of the first photodetector 13 is connected with pump light source sensor fibre, signal output part is connected with the C interface of signal handling equipment 6, and the real output value of the pump light source detecting is transferred to signal handling equipment 6 so that the frequency of the light signal of pump light source and performance number are further adjusted; The signal input part of the second photodetector 14 is connected with probe source side sensor fibre, signal output part is connected with the D interface of signal handling equipment 6, and the real output value of the probe source detecting is transferred to signal handling equipment 6 so that the frequency of the light signal of probe source and performance number are further adjusted; Measure clocking capability and be connected with sensor fibre one end with the signal input part of device 15, signal output part is connected with the B interface of signal handling equipment 6 realizes the space orientation with optical fiber each point to monitoring; The signal input part of the 3rd photodetector 16 is connected with sensor fibre one end of light path control equipment 10, and signal output part is connected with the A interface of signal handling equipment 6, realizes stimulated Brillouin scattering signal power is dorsad measured.
When the pumping pulse light of pump light source transmitting is propagated in this device, can describe its contour shape with step function, specifically use H (t, Ω)=H
1(t, Ω)+H
2(t, Ω)+H
3(t, Ω)+H
4(t, Ω) represents, wherein H (t, Ω) is stimulated Brillouin scattering light spectral term, is by pumping pulse light quadratic integral gained, that is:
wherein, H
1(t, Ω) represents pumping pulse light, and its spatial resolution is corresponding to D (duration of pumping pulse light), and its spectrum of this wide spectral range distributes more flat, unfavorable for strain monitoring; H
2the pre-pump light reciprocation of (t, Ω) indicating impulse light and pulse, the FWHW identical with continuous light (half value overall with, i.e. spectral line width Δ ν that it can obtain
b), it uses Γ
brepresent; H
3the pre-pump light of (t, Ω) indicating impulse and pulsed light reciprocation; H
4(t, Ω) represents the pre-pump light of pulse, has low spatial resolution, narrow spectral range characteristic.
During fiber-optic monitoring, obtain brillouin gain frequency spectrum: the characteristic of phonon is described with h (z, s), the length value that L is optical fiber, its expression formula is:
v wherein
b(z) be Brillouin's centre frequency at the measuring point z place on optical fiber,
accordingly, the expression formula that can obtain BGS (brillouin gain frequency spectrum Brillouin Gain Spectrum) is:
a wherein
cWfor detection of optical power, β is perturbation parameter.
Utilize this device to complete distributed strain monitoring on its whole different directions along the line upper, control pre-pump light with and the lasting time of the pre-pump light of pulse, can be so that H
4(t, Ω) is limited in the pre-pumping length of pump light, and H
3(t, Ω) and H
1the integration of (t, Ω) equates, can guarantee that like this Brillouin's gain is constant, and H
2(t, Ω) can, so that brillouin gain frequency spectrum narrows down, through after such process, can utilize two-dimentional three-dimensional stress effector 4 to realize the distributed multiaxial strain monitoring of high precision.
Modulation space two-dimensional three-dimensional stress strain monitoring platform: detection fiber monitoring device 2 is no-load running situation in the monitoring closed-loop path in early stage.Two-dimentional three-dimensional stress strain transducer 4 is connected with optical fiber monitoring device 2 separately, forms closed-loop path, substantially detect, if this sensor reading is normal, and without situations such as appearance damages, think that it possesses the pacing items that is laid in body to be measured.
Connect optical fiber 20, space two-dimensional three-dimensional stress strain monitoring platform is monitored.
First monitoring instrument is calibrated, then initial end is connected to pump light source, optical fiber 20 ends are connected to probe source, then body to be measured is placed on microcomputer controlled electro-hydraulic servo universal testing machine and is tested, and image data.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. a space two-dimensional three-dimensional stress strain monitoring platform, is characterized in that: comprise information collecting device (1), optical fiber monitoring device (2), line concentrating case (3) and be arranged on the space two-dimensional three-dimensional stress strain transducer (4) in structure to be measured (5); The ess-strain information that described space two-dimensional three-dimensional stress strain transducer (4) produces under extraneous factor effect for perception structure to be measured (5); Described optical fiber monitoring device (2) is connected with described space two-dimensional three-dimensional stress strain transducer (4) by line concentrating case (3), treats geodesic structure body (5) and monitors; Described information collecting device (1) is connected with described optical fiber monitoring device (2), for catching with storing fiber optic Monitoring Data and monitoring information being shown.
2. space two-dimensional three-dimensional stress strain monitoring platform according to claim 1, is characterized in that: described space two-dimensional three-dimensional stress strain transducer (4) comprises discoid basal disc (17), be arranged on the groove (18) of the inside circumference of basal disc (17), fixture (19), distance scale (21), angle scale (22), packaging part (23) and be positioned at the port wire jumper (24) at optical fiber (20) two ends; Described fixture (19) is arranged in the circle centre position and groove (18) of basal disc (17), for fixed fiber (20), moves towards; Described distance scale (21) arranges through the center of circle of basal disc (17), for calibrating instrument internal optical fiber (20) overall length and go up different length along the line; Described angle scale (22) is arranged on described groove (18) edge, is used for different directions and the angle of mark optical fiber (20); Described packaging part (23) covers described basal disc (17) top, by the top of fixture (19), fixes; Described port wire jumper (24) stretches out respectively basal disc (17) and is connected with external devices.
3. space two-dimensional three-dimensional stress strain monitoring platform according to claim 1 and 2, is characterized in that: described space two-dimensional three-dimensional stress strain transducer (4) uses the mode of series connection to be laid in structure to be measured (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420310649.9U CN203940886U (en) | 2013-10-24 | 2014-06-11 | A kind of space two-dimensional three-dimensional stress strain monitoring platform |
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|---|---|---|---|
| CN201320660084 | 2013-10-24 | ||
| CN201320660084.2 | 2013-10-24 | ||
| CN201420310649.9U CN203940886U (en) | 2013-10-24 | 2014-06-11 | A kind of space two-dimensional three-dimensional stress strain monitoring platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478364A (en) * | 2017-06-30 | 2017-12-15 | 中国特种设备检测研究院 | A kind of fiber-optic grating sensor applied to single-point stress monitoring |
| WO2018036340A1 (en) * | 2016-08-22 | 2018-03-01 | 同济大学 | Contact state monitoring device |
-
2014
- 2014-06-11 CN CN201420310649.9U patent/CN203940886U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018036340A1 (en) * | 2016-08-22 | 2018-03-01 | 同济大学 | Contact state monitoring device |
| CN107478364A (en) * | 2017-06-30 | 2017-12-15 | 中国特种设备检测研究院 | A kind of fiber-optic grating sensor applied to single-point stress monitoring |
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