CN204831657U - Cable body stress measurement device based on fiber bragg grating sensor technique - Google Patents
Cable body stress measurement device based on fiber bragg grating sensor technique Download PDFInfo
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- CN204831657U CN204831657U CN201520371707.3U CN201520371707U CN204831657U CN 204831657 U CN204831657 U CN 204831657U CN 201520371707 U CN201520371707 U CN 201520371707U CN 204831657 U CN204831657 U CN 204831657U
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- cable body
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Abstract
The utility model discloses a cable body stress measurement device based on fiber bragg grating sensor technique, including positioning bottom plate, positioning bottom plate surface symmetry is provided with two clamp parts, lower clamp splice that the clamp part set up including stack in proper order, goes up the clamp splice and goes up the briquetting, and lower clamp splice both ends all are provided with to be run through the down surface of clamp splice and the screw thread through -hole of bottom, positioning bottom plate is provided with first arc recess through first screw and screw thread through -hole lock solid, lower clamp splice surface middle part, goes up the second arc recess that is provided with in the middle of the clamp splice bottom with first arc groove phase symmetry, first arc recess cooperation second arc recess presss from both sides the tight cable body, two clamp part clamps are established at fiber bragg grating sensor ware both ends, upward the briquetting pass through the third screw with the end fixing of fiber bragg grating sensor ware is on last clamp splice surface, and the fiber bragg grating sensor ware is connected with data collection station. The utility model discloses simple to operate has anti electromagnetism, the quality is light, insulating property good, corrosion -resistant, advantage such as transmission loss is little.
Description
Technical field
The utility model relates to pick-up unit field, is 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.
Utility model content
The purpose of this utility model is the above problem overcoming prior art existence, a kind of cable body stress measurement device based on fiber grating sensing technology is provided, the utility model 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 utility model 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 beneficial effects of the utility model are:
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 solutions of the utility model, in order to better understand technological means of the present utility model, 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 utility model.Embodiment of the present utility model 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 the utility model embodiment 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 embodiments more of the present utility model, 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 utility model;
Fig. 2 is side-looking structural representation of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
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 utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model 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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| Application Number | Priority Date | Filing Date | Title |
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| CN201520371707.3U CN204831657U (en) | 2015-06-02 | 2015-06-02 | Cable body stress measurement device based on fiber bragg grating sensor technique |
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| CN201520371707.3U CN204831657U (en) | 2015-06-02 | 2015-06-02 | Cable body stress measurement device based on fiber bragg grating sensor technique |
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| CN204831657U true CN204831657U (en) | 2015-12-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043613A (en) * | 2015-06-02 | 2015-11-11 | 昆山市建设工程质量检测中心 | Cable stress measuring device based on fiber grating sensing technology |
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2015
- 2015-06-02 CN CN201520371707.3U patent/CN204831657U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043613A (en) * | 2015-06-02 | 2015-11-11 | 昆山市建设工程质量检测中心 | Cable stress measuring device based on fiber grating sensing technology |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20180602 |