CN105043613A - Cable stress measuring device based on fiber grating sensing technology - Google Patents
Cable stress measuring device based on fiber grating sensing technology Download PDFInfo
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- CN105043613A CN105043613A CN201510295433.9A CN201510295433A CN105043613A CN 105043613 A CN105043613 A CN 105043613A CN 201510295433 A CN201510295433 A CN 201510295433A CN 105043613 A CN105043613 A CN 105043613A
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Abstract
The invention discloses a cable stress measuring device based on the fiber grating sensing technology. The device comprises a positioning base plate, two clamping portions are symmetrically arranged at the surface of the positioning base plate, each clamping portion comprises a lower clamping block, an upper clamping block and an upper pressing block which are successively stacked, the two ends of the lower clamping block are respectively provided with threaded through holes which penetrate the surface and bottom of the low clamping block, the positioning base plate is locked to the threaded through holes via first screws, the middle of the surface of the lower clamping block is provided with a first arched groove, the middle of the upper clamping block is provided with a second arched groove which is symmetrical with the first arched groove, the first arched groove cooperates with the second arched groove to clamp a cable, the two clamping portions are respectively arranged at the two ends of a fiber grating sensor in a clamping manner, the upper pressing block fixes the end portions of the fiber grating sensor at the surface of the upper pressing block via third screws, and the fiber grating sensor is connected with a data collector. The cable stress measuring device has the advantages of being convenient to install, resistant to electromagnetism, low in weight, high in electric insulation performance, resistant to corrosion, low in transmission loss and the like.
Description
Technical field
The present invention relates to pick-up unit field, be specifically related to a kind of cable body stress measurement device based on fiber grating sensing technology.
Background technology
At present, conventional in engineering cable force measurement method has: vibration frequency method, oil pressure gauge method of reading, pressure transducer method and three-point bending method.
Frequency method has shortcomings, when application the method carries out the cable tension test of drag-line, the two ends of drag-line are defined as hinged bearing or hold-down support by us usually, but, when for multiple spot resiliency supported border, the relation between the size of Suo Li and frequency is uncertain.Simultaneously drag-line the pickup from shake frequency and determine also all to there is certain difficulty now.
Application oil pressure gauge method of reading measures the active cable force that Suo Lishi is only applicable to measure structure in work progress in engineering, cannot measure the rope internal force of the complete Cable power of stretch-draw or passive generation pulling force.
Generally adopt load sensor in pressure transducer method, also have many shortcomings, the volume of load sensor and quality are all very large, cause installing inconvenience; When measuring cable body stress data, the load sensor be difficult to damaging keeps in repair; Meanwhile, load sensor price is very high, and maintenance cost is also very high, so be difficult to generally use in engineering.
The shortcoming of 3 mensuration measurement Suo Li drag-line supposition is become " full flexible " in measuring process, but in practice, this also needs the ability of the bending resistance considering drag-line interface, otherwise measurement result will be made bigger than normal, causes the inaccurate of measurement.
Summary of the invention
The object of the invention is to the above problem overcoming prior art existence, a kind of cable body stress measurement device based on fiber grating sensing technology is provided, the present invention is easy for installation, the advantage such as have light, the anti-electromagnetism of quality, electrical insulating property is good, corrosion-resistant, loss is little, can repeat the strain of stable measurement cable body.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of cable body stress measurement device based on fiber grating sensing technology, comprise positioning plate, described positioning plate surface is symmetrically arranged with two clamping sections, described clamping section comprises the lower fixture block superposing setting successively, upper fixture block and upper holder block, described lower fixture block two ends are provided with runs through the described surface of lower fixture block and the tapped through hole of bottom, described positioning plate is locked by the first screw and tapped through hole, described lower fixture block surface middle part is provided with the first arc groove, second arc groove symmetrical with the first arc groove is provided with in the middle of bottom described upper fixture block, described first arc groove coordinates the second arc groove clamping cable body, described upper fixture block two ends are all locked by the second screw and tapped through hole, two described clamping sections are folded in fiber-optic grating sensor two ends, described upper holder block is surperficial at upper fixture block by the end winding support of described fiber-optic grating sensor by the 3rd screw, described fiber-optic grating sensor is connected with data acquisition unit.
Further, be also provided with the first gap between described upper fixture block and lower fixture block, the radius of described first arc groove and the radius of the second arc groove are equal to the radius of cable body.
Further, the 3rd arc groove is provided with in the middle of bottom described upper fixture block crown center and upper holder block.
Further, be provided with the second gap between two described the 3rd arc grooves, the radius of described 3rd arc groove equals the radius of fiber-optic grating sensor end.
Further, described fiber-optic grating sensor is unidirectional strain fiber-optic grating sensor or two-way strain fiber-optic grating sensor.
The invention has the beneficial effects as follows:
This device can not damage cable body surface, ensures the safety of cable body, and easy accessibility, disassembly process can not affect the normal use of cable body.
This application of installation scope is wide, both before cable stretching construction, this device can be installed to newly-built Cable Structure, overall process monitoring can be carried out to Suo Li within Cable Structure construction stage and operation cycle, in the Cable Structure of having runed, this device can be installed again, the basis of original Suo Li is monitored the variable quantity of the Suo Li that extraneous factor causes.
This device adds positioning plate, can be kept the Parallel Symmetric of fixture on cable body by its positioning function, and then guarantee fiber-optic grating sensor be arranged in parallel relative to cable body and the accuracy of measurement data.
The utilization of fiber-optic grating sensor makes device possess the features such as electromagnetism interference, electrical insulation capability is good, corrosion-resistant, loss is little in use, and do not need engineering staff regularly to arrive execute-in-place when using, only by communication cable, Signal transmissions need be returned in the data acquisition unit of pulpit by after multiple sensor series, just can realize automation collection, reach long-continued monitoring effect.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in embodiment of the present invention technology, be briefly described to the accompanying drawing used required in the description of embodiment technology below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is side-looking structural representation of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
With reference to shown in Fig. 1 and Fig. 2, a kind of cable body stress measurement device based on fiber grating sensing technology, comprise positioning plate 1, positioning plate surface is symmetrically arranged with two clamping sections 2, clamping section comprises the lower fixture block 21 superposing setting successively, upper fixture block 22 and upper holder block 23, lower fixture block two ends are provided with runs through the surface of described lower fixture block and the tapped through hole 24 of bottom, positioning plate is locked with tapped through hole by the first screw 11, lower fixture block surface middle part is provided with the first arc groove 211, second arc groove 221 symmetrical with the first arc groove 211 is provided with in the middle of bottom upper fixture block, first arc groove coordinates the second arc groove clamping cable body, upper fixture block two ends are all locked with tapped through hole by the second screw 12, two clamping sections are folded in fiber-optic grating sensor 3 two ends, upper holder block 23 is surperficial at upper fixture block by the end winding support of described fiber-optic grating sensor by the 3rd screw 13, fiber-optic grating sensor is connected with data acquisition unit 4.
Wherein, the first gap 5 is also provided with between upper fixture block and lower fixture block, the radius of the first arc groove and the radius of the second arc groove are equal to the radius of cable body, such can ensure the first arc groove and the second arc groove perfectly agree with cable body surface, and when locking, by the headspace in the first gap, clamping effect can be made greatly to improve, clamping effect will be caused to be deteriorated because of cable body its own resilient and by expanding with heat and contract with cold of environment temperature, finally cause detecting data deviation.
The 3rd arc groove 231 is provided with in the middle of bottom upper fixture block crown center and upper holder block.The radius being provided with the second gap the 7, three arc groove between two the 3rd arc grooves equals the radius of fiber-optic grating sensor end, and clamping mode is consistent with above-mentioned upper fixture block and lower fixture block herein, and its effect is consistent.
Described fiber-optic grating sensor is unidirectional strain fiber-optic grating sensor, this unidirectional strain fiber-optic grating sensor strain measurement scope 0-6000 μ ε, for detecting newly-built Cable Structure, before cable stretching construction, this device is installed, within Cable Structure construction stage and operation cycle, overall process monitoring can be carried out to Suo Li.
The principle of work of the present embodiment is as follows:
First that two lower fixture blocks are surperficial at positioning plate by the first screw locking during use, then cable body downside is close to the first arc groove on lower fixture block, then fixture block is laid at cable body upper side by the second arc groove laminating, and locked by the second screw and lower fixture block, because two clamping sections are symmetricly set at fixing the end, so the 3rd arc groove on two clamping sections is located on a straight line, easy for installation, there will not be two clamping section deflections not at a straight line, cause fiber-optic grating sensor inclination sandwiched, exact value cannot be drawn during measurement, and can lock after hand-held positioning plate the second screw or the 3rd screw, center of effort is large, install laborsaving.After installing fiber-optic grating sensor, removed by positioning plate, namely complete installation, installation accuracy meets testing requirement completely.
Can detect in a stationary situation after installing without the parameters numerical value under tensile state, primary data as a comparison.
Start to carry out stretch-draw to cable body, produce stretcher strain, so the cable body part between two clamping sections also can produce stretcher strain, because two clamping sections are firm and on cable body, when cable body produces stretcher strain, clamping section also can produce displacement along with cable body, again because two clamping section upper pinch are fixed wtih fiber-optic grating sensor, when described clamping section produces displacement, namely fiber-optic grating sensor is pulled, fiber-optic grating sensor is made to produce the dependent variable consistent with cable body, then variable data is now read, by the wavelength of fiber-optic grating sensor and the corresponding relation of strain, the dependent variable of the fiber-optic grating sensor after this stretch-draw can be drawn, the i.e. dependent variable of cable body herein, pass through the known elastic modulus of cable body and area of section again, just can draw cable body Suo Li now.In lasting testing process, only need the data of Real-time Collection fiber-optic grating sensor to realize, clamping effect is good, can ensure the validity detecting data for a long time.
Embodiment two
Embodiment two is with the difference of embodiment one, described fiber-optic grating sensor is two-way strain fiber-optic grating sensor, fiber-optic grating sensor strain measurement scope-2000 μ ε-+3000 μ ε, after adopting two-way strain fiber-optic grating sensor, Suo Li variable quantity in the Cable Structure of having runed can be monitored, no matter Suo Li increases (showing as normal strain) or reduces (showing as negative strain), can be transferred data in data acquisition unit, so usable range is wide by two-way strain fiber-optic grating sensor.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. the cable body stress measurement device based on fiber grating sensing technology, it is characterized in that: comprise positioning plate, described positioning plate surface is symmetrically arranged with two clamping sections, described clamping section comprises the lower fixture block superposing setting successively, upper fixture block and upper holder block, described lower fixture block two ends are provided with runs through the described surface of lower fixture block and the tapped through hole of bottom, described positioning plate is locked by the first screw and tapped through hole, described lower fixture block surface middle part is provided with the first arc groove, second arc groove symmetrical with the first arc groove is provided with in the middle of bottom described upper fixture block, described first arc groove coordinates the second arc groove clamping cable body, described upper fixture block two ends are all locked by the second screw and tapped through hole, two described clamping sections are folded in fiber-optic grating sensor two ends, described upper holder block is surperficial at upper fixture block by the end winding support of described fiber-optic grating sensor by the 3rd screw, described fiber-optic grating sensor is connected with data acquisition unit.
2. a kind of cable body stress measurement device based on fiber grating sensing technology according to claim 1, it is characterized in that: be also provided with the first gap between described upper fixture block and lower fixture block, the radius of described first arc groove and the radius of the second arc groove are equal to the radius of cable body.
3. a kind of cable body stress measurement device based on fiber grating sensing technology according to claim 1, is characterized in that: be provided with the 3rd arc groove in the middle of bottom described upper fixture block crown center and upper holder block.
4. a kind of cable body stress measurement device based on fiber grating sensing technology according to claim 3, it is characterized in that: be provided with the second gap between two described the 3rd arc grooves, the radius of described 3rd arc groove equals the radius of fiber-optic grating sensor end.
5. a kind of cable body stress measurement device based on fiber grating sensing technology according to claim 1, is characterized in that: described fiber-optic grating sensor is unidirectional strain fiber-optic grating sensor or two-way strain fiber-optic grating sensor.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107152979A (en) * | 2017-04-26 | 2017-09-12 | 广西大学 | Clipping cable cable power monitoring device |
| CN107228728A (en) * | 2017-06-30 | 2017-10-03 | 石家庄赫德光电科技有限公司 | A kind of high ferro suspension power supply cable force monitoring tension sensor and monitoring system |
| CN107294011A (en) * | 2017-07-29 | 2017-10-24 | 国网河南省电力公司南召县供电公司 | A kind of cable peeling device |
| CN108680291A (en) * | 2018-07-17 | 2018-10-19 | 大连理工大学 | A kind of cable force monitoring device based on fiber-optic grating sensor |
| CN109612403A (en) * | 2019-01-29 | 2019-04-12 | 广州大学 | A kind of fiber Bragg grating strain sensor and its installation method |
| CN109764997A (en) * | 2017-11-10 | 2019-05-17 | 宝沃汽车（中国）有限公司 | Belt tension detection method and belt tension meter |
| CN110455441A (en) * | 2019-07-24 | 2019-11-15 | 河海大学 | A kind of external tendon prestressing force testing auxiliary device |
| CN110501032A (en) * | 2019-08-15 | 2019-11-26 | 齐贺 | One kind being based on fiber grating construction sensor fixing structure |
| CN110672238A (en) * | 2019-11-15 | 2020-01-10 | 华北电力大学 | Experimental device for measuring tensile and bending stress-strain of power transmission conductor strand |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152979A (en) * | 2017-04-26 | 2017-09-12 | 广西大学 | Clipping cable cable power monitoring device |
| CN107228728A (en) * | 2017-06-30 | 2017-10-03 | 石家庄赫德光电科技有限公司 | A kind of high ferro suspension power supply cable force monitoring tension sensor and monitoring system |
| CN107294011A (en) * | 2017-07-29 | 2017-10-24 | 国网河南省电力公司南召县供电公司 | A kind of cable peeling device |
| CN107294011B (en) * | 2017-07-29 | 2023-08-22 | 国网河南省电力公司南召县供电公司 | Cable stripping device |
| CN109764997A (en) * | 2017-11-10 | 2019-05-17 | 宝沃汽车（中国）有限公司 | Belt tension detection method and belt tension meter |
| CN108680291A (en) * | 2018-07-17 | 2018-10-19 | 大连理工大学 | A kind of cable force monitoring device based on fiber-optic grating sensor |
| CN108680291B (en) * | 2018-07-17 | 2024-01-05 | 大连理工大学 | Cable force monitoring device based on fiber bragg grating sensor |
| CN109612403A (en) * | 2019-01-29 | 2019-04-12 | 广州大学 | A kind of fiber Bragg grating strain sensor and its installation method |
| CN110455441A (en) * | 2019-07-24 | 2019-11-15 | 河海大学 | A kind of external tendon prestressing force testing auxiliary device |
| CN110455441B (en) * | 2019-07-24 | 2021-06-01 | 河海大学 | External cable prestressing force test auxiliary device |
| CN110501032A (en) * | 2019-08-15 | 2019-11-26 | 齐贺 | One kind being based on fiber grating construction sensor fixing structure |
| CN110672238A (en) * | 2019-11-15 | 2020-01-10 | 华北电力大学 | Experimental device for measuring tensile and bending stress-strain of power transmission conductor strand |
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