CN209147940U - A kind of makeshift stage truss structure stress security optical fibre Grating Detecting System - Google Patents
A kind of makeshift stage truss structure stress security optical fibre Grating Detecting System Download PDFInfo
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- CN209147940U CN209147940U CN201821686504.3U CN201821686504U CN209147940U CN 209147940 U CN209147940 U CN 209147940U CN 201821686504 U CN201821686504 U CN 201821686504U CN 209147940 U CN209147940 U CN 209147940U
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Abstract
The utility model discloses a kind of makeshift stage truss structure stress security optical fibre Grating Detecting Systems, including light source, coupler, fiber-optic grating sensor, steel pipe, fiber Bragg grating (FBG) demodulator, host computer and alarm, light source is used to provide optical signal to coupler, coupler is connect by optical fiber with fiber-optic grating sensor, fiber Bragg grating (FBG) demodulator, fiber Bragg grating (FBG) demodulator and upper mechatronics, host computer is electrically connected with alarm, the fiber-optic grating sensor is arranged in steel pipe, and steel pipe is removably attachable to the fatiguability position of stage truss.Long service life, it is cheap, be not easy to be affected by the external environment.
Description
Technical field
The utility model belongs to optical fiber grating sensing field, specifically a kind of makeshift stage truss structure stress safety
Fiber grating detection system.
Background technique
It is present since the safety accident of makeshift stage is increasingly frequent, the security of the lives and property of people is by prestige
The side of body, so the safety problem of stage truss is urgently to be resolved.
Although fiber-optic grating sensor has been applied to some fields, the research and development of specialized complete sensing technology are obtained, such as
Aerospace, navigation, civil engineering, medicine and biology, power industry, nuclear industry and chemistry and environment etc., but waved temporarily
The application of platform field is few and immature, and this patent is to research and develop the fiber grating detection system of a set of measurement makeshift stage truss,
It for this advanced technology of fiber grating, is applied to makeshift stage field and lays the foundation, and provide skill for stage safety detection aspect
Art is supported.
The sensor of traditional measurement strain is strain-ga(u)ge transducer, and the service life is short, price, unstable chemcial property, in rain
It is perishable, transmission capacity is smaller, is easily affected by the external environment.
Summary of the invention
Place, the utility model provide a kind of makeshift stage truss structure stress in order to overcome the above-mentioned deficiencies of the prior art
Security optical fibre Grating Detecting System, the service life is long, it is cheap, be not easy to be affected by the external environment.
To achieve the above objectives, the present invention adopts the following technical solutions: a kind of makeshift stage truss structure stress peace
All -fiber Grating Detecting System, including light source, coupler, fiber-optic grating sensor, steel pipe, fiber Bragg grating (FBG) demodulator, host computer
And alarm, light source are used to provide optical signal to coupler, coupler passes through optical fiber and fiber-optic grating sensor, fiber grating solution
Instrument connection is adjusted, fiber Bragg grating (FBG) demodulator and upper mechatronics, host computer are electrically connected with alarm, the fiber-optic grating sensor
It is arranged in steel pipe, steel pipe is removably attachable to the fatiguability position of stage truss.
In the above-mentioned technical solutions, the fiber-optic grating sensor is externally provided with capillary tubing, is equipped with first in capillary tubing
Epoxy resin layer, capillary tubing are externally provided with second layer epoxy resin layer, and the both ends of capillary tubing are equipped with fixed ring for fixing,
The both ends of steel pipe are equipped with the third epoxy resin layer for fixing optical fiber.
In the above-mentioned technical solutions, the both ends of the steel pipe are equipped with L-shaped connecting plate, and connecting plate is equipped with through-hole, lead to
It is equipped with the steel pipe sleeve for connecting with steel tube end part at hole, is set on connecting plate there are two bolt hole, connecting plate passes through U-bolt
It is connect with stage truss.
In the above-mentioned technical solutions, the fiber Bragg grating (FBG) demodulator is connect by RS232 serial ports with host computer.
The beneficial effects of the utility model are: arranging dismountable light by the generation fatigue or injury region in stage truss
Fiber grating sensor, and the optical signal of fiber grating is converted by electric signal by fiber Bragg grating (FBG) demodulator and passes to host computer,
Electric signal issues police by warning device when deflection is excessive to learn the deflection of stage truss to host computer by analysis
Report, avoids causing danger, and the long service life of the system, cheap, external environment are small to the system interference, measurement knot
Fruit is accurate.
Detailed description of the invention
Fig. 1 is the part-structure connection figure of the utility model.
Fig. 2 is the structural schematic diagram of steel pipe and connecting plate in the utility model.
Fig. 3 is the schematic diagram of internal structure of fiber grating.
Fig. 4 is the truss structure schematic diagram of makeshift stage.
Fig. 5 is FEM Numerical Simulation figure.
Fig. 6 is the workflow block diagram of the utility model.
Wherein: 1. table tops, 2. stage brackets, 3. telescopic rods, 4. sole brackets, 5. first fatiguability positions, 6. second easily
Fatigue location, 7. third fatiguability positions, 8. steel pipes, 9. connecting plates, 10. steel pipe sleeves, 11. fiber-optic grating sensors, 12. light
Fibre, 13. first epoxy resin layers, 14. second epoxy resin layers, 15. capillary tubings, 16. third epoxy resin layers, 17. is fixed
Ring, 18. fiber Bragg grating (FBG) demodulators, 19. host computers, 20. warning devices.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the utility model is described in further detail.
Such as Fig. 1-Fig. 3 and a kind of makeshift stage truss structure stress security optical fibre Grating Detecting System shown in fig. 6, including
Light source, coupler, fiber-optic grating sensor 11, steel pipe 8, fiber Bragg grating (FBG) demodulator 18, host computer 19 and alarm 20, light source are used
In providing optical signal to coupler, coupler is connect by optical fiber 12 with fiber-optic grating sensor 11, fiber Bragg grating (FBG) demodulator 18,
Fiber Bragg grating (FBG) demodulator 18 is electrically connected with host computer 19, and host computer 19 is electrically connected with alarm 20, the fiber-optic grating sensor
11 are arranged in steel pipe 8, and steel pipe 8 is removably attachable to the fatiguability position of stage truss.
In the above-mentioned technical solutions, the fiber-optic grating sensor 11 is externally provided with capillary tubing 15, sets in capillary tubing 15
There is the first epoxy resin layer 13, capillary tubing 15 is externally provided with second layer epoxy resin layer 14, and the both ends of capillary tubing 15, which are equipped with, to be used
In fixed fixed ring 17, the both ends of steel pipe 8 are equipped with the third epoxy resin layer 16 for fixing optical fiber 23.Third epoxy resin
Layer 16 can both fix optical fiber 12, isolation external stress can also will be made all to conduct capillary steel at hollow inside steel pipe 8
In pipe 15, so as to more accurately measure the adaptability to changes of fatiguability position.
In the above-mentioned technical solutions, the both ends of the steel pipe 8 are equipped with L-shaped connecting plate 9, and connecting plate 9 is equipped with through-hole,
Through hole is equipped with the steel pipe sleeve 10 for connecting with 8 end of steel pipe, is set on connecting plate 9 there are two bolt hole, connecting plate 9 passes through
U-bolt is connect with stage truss.Steel pipe sleeve 10 is stepped construction, in order to reinforce between steel pipe sleeve 10 and steel pipe 8
Bonding strength can apply glue in the small end outer wall of steel pipe sleeve 10.
In the above-mentioned technical solutions, the fiber Bragg grating (FBG) demodulator 18 is connect by RS232 serial ports with host computer.
Using the utility model system when, first according to the size of makeshift stage, material, the structure of truss, first in three-dimensional
The unit composition truss of makeshift stage is drawn in graphics software, as shown in Figure 4；Real structure in practice is maximumlly restored,
It is made of several table tops 1, telescopic rod 3, stage bracket 2, sole bracket 4, brace, the size of single table top 1 is 1220mm*
1220mm*5mm, all parts are standard components, can be assembled into oneself desired form at random；Second step, using finite element
Software carries out the simulation analysis of structure, specific steps are as follows: to the makeshift stage in Fig. 4 to the makeshift stage three-dimensional structure in Fig. 4
Grid dividing is carried out, several units and node are formed, in order to preferably progress discrete calculation；A face is selected, into
Row applied force, in actually performance, performer changes multiplicity to the power of stage, it is difficult to calculate this excitation, therefore selection one average
Power 1200N carries out force analysis to surface 1, applies pressure, an excitation as stage performer to table top；Solution is easy to happen
The position of fatigue is acquired by analysis as a result, as shown in figure 5, the first fatiguability position 5, the second fatiguability position 6 in Fig. 5
It is the position for being easy to happen deformation with third fatiguability position 7, so the steel pipe 8 of fiber-optic grating sensor 11 is passed through U-shaped spiral shell
Bolt and connecting plate 9 are arranged at this 3 point.
When truss generates deformation, the pitch in fiber-optic grating sensor 11 changes, and the light for causing light source to be injected exists
It is reflected at pitch, when the stress difference being subject to, different pitch will be caused, then the wavelength of the optical signal returned is just not
Equally, this is the basic principle of Fibre Optical Sensor, returns to optical signal through conducting optical fiber 12 and passes to the light on fiber Bragg grating (FBG) demodulator 18
Electric conversion module is converted into faint electric signal, through amplifying circuit, amplifies electric signal, realizes the acquisition of signal, fiber grating
(FBG) demodulator 18 is transferred data in the software labview in host computer, and carry out data processing, is passed through by RS232 serial ports
Fourier transformation, filtering processing obtain required waveform, strain comparative maturity for fiber-optic grating sensor measurement,
Pitch changes caused wavelength drift amount and deformation direct proportionality and obtains makeshift stage so handling by related algorithm
The stress variation of truss provides data for stage safety monitoring and supports.
Alarm threshold value is set in labview, connects the hardware alarms device of periphery.The makeshift stage truss structure that will be measured
Adaptability to changes, be arranged to different gradients, adaptability to changes is set as 10 grades by the system in the present embodiment in proportion, 1-7 be it is normal, refer to
Show the color of lamp for green；7-9 grades of adaptability to changes, the color of indicator light are yellow；10 grades or more are triggered alarm system, due to
Adaptability to changes is continually changing, it is assumed that insists on the continuous regular hour when 10 grades or more, can be considered the quilt of makeshift stage truss
Dangerous at measuring point, to avoid alarm song that unnecessary fear occurs to people around, the detection system that we design provides voice
Prompt, such as: the performer of stage, which note that around 5 points of makeshift stage, security risk, please leaves stage immediately！
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.
Claims (4)
1. a kind of makeshift stage truss structure stress security optical fibre Grating Detecting System, it is characterized in that: include light source, coupler,
Fiber-optic grating sensor, steel pipe, fiber Bragg grating (FBG) demodulator, host computer and alarm, light source are used to provide optical signal to coupler,
Coupler is connect by optical fiber with fiber-optic grating sensor, fiber Bragg grating (FBG) demodulator, and fiber Bragg grating (FBG) demodulator is electrically connected with host computer
It connects, host computer is electrically connected with alarm, and the fiber-optic grating sensor is arranged in steel pipe, and steel pipe is removably attachable to stage
The fatiguability position of truss.
2. makeshift stage truss structure stress security optical fibre Grating Detecting System according to claim 1, it is characterized in that: institute
It states fiber-optic grating sensor and is externally provided with capillary tubing, be equipped with the first epoxy resin layer in capillary tubing, capillary tubing is externally provided with the
Two layers of epoxy resin layer, the both ends of capillary tubing are equipped with fixed ring for fixing, and the both ends of steel pipe are equipped with for fixing optical fiber
Third epoxy resin layer.
3. makeshift stage truss structure stress security optical fibre Grating Detecting System according to claim 1, it is characterized in that: institute
The both ends for stating steel pipe are equipped with L-shaped connecting plate, and connecting plate is equipped with through-hole, and through hole is equipped with for connecting with steel tube end part
Steel pipe sleeve is set on connecting plate there are two bolt hole, and connecting plate is connect by U-bolt with stage truss.
4. makeshift stage truss structure stress security optical fibre Grating Detecting System according to claim 1, it is characterized in that: institute
Fiber Bragg grating (FBG) demodulator is stated to connect by RS232 serial ports with host computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821686504.3U CN209147940U (en) | 2018-10-09 | 2018-10-09 | A kind of makeshift stage truss structure stress security optical fibre Grating Detecting System |
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| CN201821686504.3U CN209147940U (en) | 2018-10-09 | 2018-10-09 | A kind of makeshift stage truss structure stress security optical fibre Grating Detecting System |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532258A (en) * | 2021-07-15 | 2021-10-22 | 上海汇焰智能科技有限公司 | Stage mother frame capable of monitoring deformation and control method for preventing deformation |
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2018
- 2018-10-09 CN CN201821686504.3U patent/CN209147940U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532258A (en) * | 2021-07-15 | 2021-10-22 | 上海汇焰智能科技有限公司 | Stage mother frame capable of monitoring deformation and control method for preventing deformation |
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