CN203894197U - Sensing device for monitoring bridge hanging rope damage employing active and passive waveguide - Google Patents
Sensing device for monitoring bridge hanging rope damage employing active and passive waveguide Download PDFInfo
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- CN203894197U CN203894197U CN201420312029.9U CN201420312029U CN203894197U CN 203894197 U CN203894197 U CN 203894197U CN 201420312029 U CN201420312029 U CN 201420312029U CN 203894197 U CN203894197 U CN 203894197U
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- hoist cable
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Abstract
The utility model provides a sensing device for monitoring bridge hanging rope damage employing active and passive waveguide. The sensing device comprises a hoop matched with a bridge hanging rope in diameter, wherein five first notch grooves are formed in the axial direction of the hoop; two second notch grooves are respectively formed in an upper hoop body and a lower hoop body in the circumferential direction; wire slots which are equal to the hoop in length are respectively formed in one sides of the upper hoop body and the lower hoop body; 20 piezoelectric ceramic sensors are arranged on the notch grooves; a signal transmission line is welded on the upper surface of each piezoelectric sensor; the transmission lines are routed along the wire slots; the transmission lines are high-shield coaxial cables; an insulating layer is arranged on the surface of the sensing device; an electromagnetic shielding layer is arranged on the surface of the insulating layer; and the electromagnetic shielding layer and the insulating layer are connected through epoxy resin. By adopting the sensing device, the data of the bridge hanging rope damage can be well collected, and a hardware platform is provided for non-destructive detection of the damage of the whole bridge hanging rope.
Description
Technical field
The utility model relates to construction engineering technical field, and particularly the moving waveguide monitoring bridge of a kind of main quilt draws the sensing device of hoist cable damage.
Background technology
Long-span bridges is the economic lifeline of countries and regions, and the construction of bridge and maintenance are the piths of a national basis facility.In long-span bridges, drawing hoist cable is main primary structure member.Within the operating period that reaches decades; under the coupling of the factors such as long-term effect, fatigue effect and the unexpected catastrophe effect of environmental attack, material aging and load; damage accumulation and the drag decay of structure and system will inevitably be caused; thereby opposing disaster, even the ability under home effect declines, and under extreme case, will cause catastrophic burst accident.Newly building bridge draws the cost of hoist cable generally to account for 25%～30% of full-bridge, if it is changed to rope, the price of changing rope is newly-built 3～4 times.Bridge draws hoist cable damage monitoring method to have manual detection method at present, and the method is mainly carried out body structure surface observation by naked eyes or magnifier, helpless to inherent vice; Ultrasonic detection method, by echo time and signal intensity, is known the position of damage.The method bridge draw hoist cable detect in effect undesirable, be mainly because draw between hoist cable inner wire (steel strand wires) and have some spaces, surface is rough and uneven in surface, damage field is fixing, causes echoed signal unintelligible.Ray detection can only one section of detection, and testing cost is higher, instrument is expensive, have certain radiativity.Although Magnetic Flux Leakage Inspecting method can more clearly judge position and the quantity of fracture of wire; but this equipment complexity, for the hoist cable that draws that has external protection, not high, the same defect spatial resolution of accuracy of detection is not high; damage for the hoist cable that draws being embedded in beam, detect effect poorer.
Since piezoelectric effect is found, the research to piezoelectric and be applied in bridge and draw the application in hoist cable damage monitoring to get the attention.Piezoelectric ceramics has positive inverse piezoelectric effect.Utilize the positive-effect of piezoelectric ceramics, developed initiatively waveguide monitoring technology (supersonic guide-wave), detect the existence of damage by " inquiry " structure, and estimate its degree; Utilize its back wash effect, developed into passive waveguide monitoring technology (acoustic emission), do not need it to interact by the response of " listening " structure, monitoring of structures damage.Waveguide detection technique has a lot of outstanding advantages: long, highly sensitive, the different mode of propagation distance to different type of impairment sensitivities, detect wide.Guided wave is drawing inside and the surperficial vibration that has particle of hoist cable, sound field spreads all over whole waveguide, the signal receiving comprises the globality information of drawing hoist cable inside and contact interface, and therefore guided wave detection technology can detect the information of whole waveguide, instead of a point or a face.Draw the damage monitoring of hoist cable to obtain some application at bridge based on active waveguide monitoring technology (supersonic guide-wave) at present, the method has good accuracy of detection to the damage having existed, but undesirable for drawing the damage evolution monitoring effect of hoist cable.And passive waveguide monitoring technology (acoustic emission) draws the damage incapability having existed in hoist cable unable to bridge, but there is higher monitoring accuracy to drawing hoist cable damage to develop.
Summary of the invention
The technical problems to be solved in the utility model, be to provide the moving waveguide monitoring bridge of a kind of main quilt to draw the sensing device of hoist cable damage, can gather well the data that bridge draws hoist cable damage, draw the damage of hoist cable that a hardware platform is provided for realizing lossless detection full-bridge beam.
The utility model is achieved in that the moving waveguide monitoring bridge of a kind of main quilt draws the sensing device of hoist cable damage, and described sensing device comprises a clip that draws hoist cable diameter to match with described bridge; In the axial direction of described clip, offer at least 5 road the first cuttings, and each the first cutting is uniformly distributed; Described clip comprises upper and lower two hoop bodies; Described upper hoop and lower hoop are upwards offering at least 2 road the second cuttings week respectively; 4 total road the second cuttings of upper hoop and lower hoop are uniformly distributed, and upper hoop becomes 90 degree angles with two cornerwise the second cuttings after lower hoop fastening; Described upper hoop and lower hoop one side offer respectively one with clip with long wire casing; On the 1st, 3,5 roads in described 5 road the first cuttings, be provided with 4 piezoceramic transducers, and the long edge clip circumferential arrangement of each 4 piezoceramic transducers being positioned in 4 road the second cuttings, as the sensing device that produces torsion mode; On the 2nd, 4 roads in 5 road the first cuttings, be provided with 4 piezoceramic transducers, and the long edge clip of each 4 piezoceramic transducers is axial arranged and be positioned in 4 road the second cuttings, as the sensing device that produces longitudinal mode; A signal transmssion line of upper surface welding of described piezoceramic transducer, transmission line carries out cabling along wire casing, and described transmission line is high shielding coaxial cable, and described sensing device surface is laid with an insulation course; Described surface of insulating layer is laid with an electro-magnetic screen layer, and electro-magnetic screen layer is connected by epoxy resin with insulation course.
Further, described clip is cylindrical clip.
Further, between adjacent two first cuttings of described 5 road the first cuttings, distance is 15～25mm.
Further, described each the second groove depth is 3～4mm, and length is 20～30mm; The width of described wire casing is 5～10mm.
Further, described piezoceramic transducer adopts cementing agent to be fixed in the first cutting or the second cutting.
Further, described thickness of insulating layer is 0.1～0.3mm; The thickness of electro-magnetic screen layer is 0.5～2mm.
Further, described insulation course is the thin adhesive tape of thermosetting imines; Described electro-magnetic screen layer is superelevation conductive silicon rubber.
The utility model has the advantage of: the utility model is integrated together two kinds of sensors that produce longitudinal mode and torsion mode, form 5 roads and survey, and on clip, be provided with high shielding coaxial cable, insulation course and electro-magnetic screen layer; Thereby form the moving waveguide testing sensor of main quilt with electromagnetic screen and filter function; Wherein three road sensors as active monitoring, remaining two road sensors as passive monitoring; Or two road sensors as active monitoring, remaining three road sensors as passive monitoring.The utility model can gather the data that bridge draws hoist cable to damage well, draws the damage of hoist cable that a hardware platform is provided for realizing lossless detection full-bridge beam.
Brief description of the drawings
Fig. 1 is the structural representation that the utility model removes insulation course and electro-magnetic screen layer.
Fig. 2 is schematic cross-section of the present utility model.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, the moving waveguide monitoring bridge of a kind of main quilt draws the sensing device of hoist cable damage, and described sensing device comprises a clip 1 that draws hoist cable diameter to match with described bridge; In the axial direction of described clip 1, offer at least 5 road the first cuttings 11, and each the first cutting 11 is uniformly distributed; Described clip 1 comprises upper and lower two hoop bodies (12,13); Described upper hoop 12 and lower hoop 13 are upwards offering at least 2 road the second cuttings 14 week respectively; 4 total road the second cuttings 14 of upper hoop 12 and lower hoop 13 are uniformly distributed, and 14 one-tenth 90 degree angle α of upper hoop 12 and two cornerwise the second cutting after lower hoop 13 fastenings; Described upper hoop 12 and lower hoop 13 1 sides offer respectively one with clip 1 with long wire casing (not shown); On the 1st, 3,5 roads in described 5 road the first cuttings 11, be provided with 4 piezoceramic transducers 3, and the long edge clip circumferential arrangement of each 4 piezoceramic transducers 3 being positioned in 4 road the second cuttings 14, as the sensing device that produces torsion mode; On the 2nd, 4 roads in 5 road the first cuttings 11, be provided with 4 piezoceramic transducers, and the long edge clip of each 4 piezoceramic transducers is axial arranged and be positioned in 4 road the second cuttings 14, as the sensing device that produces longitudinal mode; A upper surface signal transmssion line of welding (not shown) of described piezoceramic transducer 3, transmission line carries out cabling along wire casing, and described transmission line is high shielding coaxial cable, and described sensing device surface is laid with an insulation course 4; Described insulation course 4 surfaces are laid with an electro-magnetic screen layer 5, and electro-magnetic screen layer 5 is connected by epoxy resin (not shown) with insulation course 4.
Be cylindrical clip at clip 1 described in the utility model.As long as also in practical application also can for other shapes can draw hoist cable to hold tightly on bridge.
Wherein, between adjacent two first cuttings of described 5 road the first cuttings 11, distance is 15～25mm.Described each the second groove depth is 3～4mm, and length is 20～30mm; The width of described wire casing is 5～10mm.
In addition, described piezoceramic transducer 3 adopts cementing agent to be fixed in the first cutting 11 or the second cutting 14.Described insulation course 4 thickness are 0.1～0.3mm; The thickness of electro-magnetic screen layer 5 is 0.5～2mm.Described insulation course is the thin adhesive tape of thermosetting imines; Described electro-magnetic screen layer is superelevation conductive silicon rubber.
In a word, the utility model is integrated together two kinds of sensors that produce longitudinal mode and torsion mode, forms 5 roads and surveys, and on clip, be provided with high shielding coaxial cable, insulation course and electro-magnetic screen layer; Thereby form the moving waveguide testing sensor of main quilt with electromagnetic screen and filter function; Wherein three road sensors as active monitoring, remaining two road sensors as passive monitoring; Or two road sensors as active monitoring, remaining three road sensors as passive monitoring.The utility model can gather the data that bridge draws hoist cable to damage well, draws the damage of hoist cable that a hardware platform is provided for realizing lossless detection full-bridge beam.
The foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (7)
1. the moving waveguide monitoring bridge of main quilt draws a sensing device for hoist cable damage, it is characterized in that: described sensing device comprises a clip that draws hoist cable diameter to match with described bridge; In the axial direction of described clip, offer at least 5 road the first cuttings, and each the first cutting is uniformly distributed; Described clip comprises upper and lower two hoop bodies; Described upper hoop and lower hoop are upwards offering at least 2 road the second cuttings week respectively; 4 total road the second cuttings of upper hoop and lower hoop are uniformly distributed, and upper hoop becomes 90 degree angles with two cornerwise the second cuttings after lower hoop fastening; Described upper hoop and lower hoop one side offer respectively one with clip with long wire casing; On the 1st, 3,5 roads in described 5 road the first cuttings, be provided with 4 piezoceramic transducers, and the long edge clip circumferential arrangement of each 4 piezoceramic transducers being positioned in 4 road the second cuttings, as the sensing device that produces torsion mode; On the 2nd, 4 roads in 5 road the first cuttings, be provided with 4 piezoceramic transducers, and the long edge clip of each 4 piezoceramic transducers is axial arranged and be positioned in 4 road the second cuttings, as the sensing device that produces longitudinal mode; A signal transmssion line of upper surface welding of described piezoceramic transducer, transmission line carries out cabling along wire casing, and described transmission line is high shielding coaxial cable, and described sensing device surface is laid with an insulation course; Described surface of insulating layer is laid with an electro-magnetic screen layer, and electro-magnetic screen layer is connected by epoxy resin with insulation course.
2. the moving waveguide monitoring bridge of main quilt according to claim 1 draws the sensing device of hoist cable damage, it is characterized in that: described clip is cylindrical clip.
3. the moving waveguide monitoring bridge of main quilt according to claim 1 draws the sensing device of hoist cable damage, it is characterized in that: between adjacent two first cuttings of described 5 road the first cuttings, distance is 15～25mm.
4. the moving waveguide monitoring bridge of main quilt according to claim 1 draws the sensing device of hoist cable damage, it is characterized in that: described each the second groove depth is 3～4mm, and length is 20～30mm; The width of described wire casing is 5～10mm.
5. the moving waveguide monitoring bridge of main quilt according to claim 1 draws the sensing device of hoist cable damage, it is characterized in that: described piezoceramic transducer adopts cementing agent to be fixed in the first cutting or the second cutting.
6. the moving waveguide monitoring bridge of main quilt according to claim 1 draws the sensing device of hoist cable damage, it is characterized in that: described thickness of insulating layer is 0.1～0.3mm; The thickness of electro-magnetic screen layer is 0.5～2mm.
7. the moving waveguide monitoring bridge of main quilt according to claim 1 draws the sensing device of hoist cable damage, it is characterized in that: described insulation course is the thin adhesive tape of thermosetting imines; Described electro-magnetic screen layer is superelevation conductive silicon rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420312029.9U CN203894197U (en) | 2014-06-12 | 2014-06-12 | Sensing device for monitoring bridge hanging rope damage employing active and passive waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420312029.9U CN203894197U (en) | 2014-06-12 | 2014-06-12 | Sensing device for monitoring bridge hanging rope damage employing active and passive waveguide |
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| Publication Number | Publication Date |
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| CN203894197U true CN203894197U (en) | 2014-10-22 |
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| CN201420312029.9U Withdrawn - After Issue CN203894197U (en) | 2014-06-12 | 2014-06-12 | Sensing device for monitoring bridge hanging rope damage employing active and passive waveguide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034803A (en) * | 2014-06-12 | 2014-09-10 | 福建省建筑科学研究院 | Sensing device and monitoring method of active and passive waveguide monitoring bridge cable damage |
| CN106286550A (en) * | 2016-09-29 | 2017-01-04 | 大连理工大学 | A kind of intelligent nut device for monitoring bolt connection state |
| CN106402124A (en) * | 2016-09-29 | 2017-02-15 | 大连理工大学 | Intelligent bolt device for monitoring dynamic stress conditions of bolt connection |
-
2014
- 2014-06-12 CN CN201420312029.9U patent/CN203894197U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034803A (en) * | 2014-06-12 | 2014-09-10 | 福建省建筑科学研究院 | Sensing device and monitoring method of active and passive waveguide monitoring bridge cable damage |
| CN106286550A (en) * | 2016-09-29 | 2017-01-04 | 大连理工大学 | A kind of intelligent nut device for monitoring bolt connection state |
| CN106402124A (en) * | 2016-09-29 | 2017-02-15 | 大连理工大学 | Intelligent bolt device for monitoring dynamic stress conditions of bolt connection |
| CN106402124B (en) * | 2016-09-29 | 2018-11-09 | 大连理工大学 | A kind of intelligent bolt device for monitoring bolt connection dynamic stress situation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141022 Effective date of abandoning: 20160420 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |