CN101329304A - Modularization excitation detection device - Google Patents
Modularization excitation detection device Download PDFInfo
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- CN101329304A CN101329304A CNA2008100228385A CN200810022838A CN101329304A CN 101329304 A CN101329304 A CN 101329304A CN A2008100228385 A CNA2008100228385 A CN A2008100228385A CN 200810022838 A CN200810022838 A CN 200810022838A CN 101329304 A CN101329304 A CN 101329304A
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Abstract
The invention discloses a modularization excitation detection device, at least comprising two single-section exciters; furthermore, a traction bracket is arranged on at least one single-section exciter; the single-section exciter is provided with a connecting part used for the rotary connection of adjacent single-section exciters. The connecting part is provided with a hole which is internally provided with a connecting bolt; the connecting part is provided with an adjusting trough which is internally provided with an adjusting bolt; furthermore, the connecting part is fixed on a first magnet cover or a second magnet cover by the adjusting bolt. By changing the number of the accessed exciters, the width of each single-section exciter and the angle between the exciters, the cables of different diameters can be magnetized and detected; the smart and changeable modularization exciter can carry out the excitation and detection of other tested parts with complex shapes such as I-steel and angle steel, etc.; the magnetic-leakage signal of the tested part can be conveniently and effectively detected by the methods of permanent magnet excitation and Hall detection.
Description
Technical field
The present invention relates to a kind ofly to striding the measured object of cable-stayed bridge cable and some other complicated shapes greatly, the device that carries out excitation and detection relates in particular to a kind of modularization excitation detection device.
Background technology
Cable is widely used in elevator, crane and the various building, is one of load-carrying members the most frequently used in the engineering.In large foundation facilities such as cable-stayed bridge, suspension bridge, most of weight of bearing these buildings especially of cable is very big to the influence of building safety.If the structural health of cable goes wrong, the light then normal use of influence building, heavy then the people's lives and property is constituted greatly threat.Along with the economic development and the social development in the world, various heavy constructions are more and more.Under these circumstances, the monitoring to wire rope assemblies health also seems more and more important.With China is example, and only in field of cable-stayed bridge, owing to lack enough monitorings and corresponding maintenance, existing in recent years eight bridge blocks have carried out drag-line and changed or reinforce.
External situation allows of no optimist equally.The Kohlbrand Estruary bridge of Hamburg, Germany is because the suspension cable seriously corroded, in addition because the sewage of the salinity that mixing that vehicle ' splashes makes the suspension cable expansion, that builds up just changed whole suspension cables on the 3rd year, costing and reach 6,000 ten thousand dollars, is four times of original cost.
Cable internal stress more complicated, the stress that is subjected to when cable is excessive or when too concentrating, and when perhaps the pe sheath of outside is damaged, corrosion takes place extremely easily until fracture, and then may cause security incident.Therefore, the urgent hope of engineering circle can have a cover system can detect the situation of cable internal corrosion fracture accurately.But, during present engineering is used, also there is not a kind of comparatively suitable method, can only lean on people's visual inspection substantially, present cable has arrived certain time limit substantially and has just all changed, and wastes very big.If can develop a kind of convenience and have the method for high accuracy to detect cable, thereby the safety of guarantee large foundation facility will have very big engineering Practical significance and huge potential economic benefit.
At present, the representative method that has proposed has: ultrasonic Detection Method, infiltration detection method, ray detection method, acoustic emission detection method, detection method of eddy, electromagnetic detection method etc.In recent years, except Electromagnetic Testing Technology was used in practice, other detection methods still only limited to laboratory study, and the electromagnetic detection method is the most reliable wire rope cable detection method of generally acknowledging at present.
Summary of the invention
The invention provides a kind of simple in structure, widely applicable and can improve the modularization excitation detection device that detects quality.
The present invention adopts following technical scheme:
A kind of modularization excitation detection device, comprise at least 2 joint single-unit magnetizing exciters and at least therein a single-unit magnetizing exciter be provided with towing bracket, on the single-unit magnetizing exciter, be provided with and be used for the web member that adjacent single-unit magnetizing exciter is rotationally connected.
Of the present invention detected mainly to as if stride the cable of cable-stayed bridge greatly, for large diameter cable, adopt and manyly magnetic pole is encircled cable magnetize, can reach abundant magnetized purpose, help the generation of magnetic leakage signal.Modularization excitation detection device of the present invention just can constitute approximate regular polygon by connecting the single-unit magnetizing exciter of different numbers, encircles cable.For example, the 6 joint length of sides are that regular hexagon that the single-unit magnetizing exciter of 66.4mm constitutes can carry out excitation to the cable of diameter 90mm and detects; The 8 joint length of sides are that the octagon that the single-unit magnetizing exciter of 66.27mm constitutes can carry out the excitation detection to the cable of diameter 135mm.
But simply also be not enough to satisfy actual requirement by single-unit magnetizing exciter (being the increase and decrease of regular polygon limit number), because change the regular polygon parameter, the vary in diameter amount of its regular polygon incircle is bigger (to be that magnetic pole and testing circuit on the single-unit magnetizing exciter is too big to the distance on cable surface, be unfavorable for detecting faint magnetic leakage signal), can not satisfy the specification of actual cable.By Wuhan Jun Shan Changjiang River Highway Bridge, its cable diameters between the 145mm, is at interval with 5mm at 95mm.So the length of side of the single-unit magnetizing exciter of the present invention's design can be regulated, regulate the variation that the single-unit magnetizing exciter length of side can be realized in the position of bolt in regulating tank by changing.For example: the 6 joint length of sides are that the regular hexagon that the single-unit magnetizing exciter of 66.4mm constitutes can carry out the excitation detection to the cable of diameter 90mm; The 6 joint length of sides are that the regular hexagon that the single-unit magnetizing exciter of 72.17mm constitutes can carry out the excitation detection to the cable of diameter 100mm.
When excitation module composition regular polygon carried out excitation to cable, whole module dimidiation whenever partly all had a joint magnetizing exciter to be fixed on cable rope climbing robot or other haulage gears by towing bracket.
On described single-unit magnetizing exciter, each fixes one piece of permanent magnet as magnetic pole with magnet cover two ends, then is Hall element and peripheral circuit thereof on the testing circuit between two permanent-magnet poles.
Connect by bolt between described magnet cover and the web member, opened one section regulating tank on the web member, the relative position of scalable and magnet cover promptly changes the length of side of every joint magnetizing exciter.
For those complex-shaped measured pieces, as joist steel, angle steel etc.The present invention also can carry out excitation to it effectively and detect.Just can carry out excitation to angle steel when for example, two joint single-unit magnetizing exciters become an angle of 90 degrees detects.
Connect with coupling bolt by the hole on the web member between the magnetizing exciter, both can insert the single-unit magnetizing exciter of varying number, also can change angle between magnetizing exciter neatly by coupling bolt.
And excitation and pick-up unit will be carried into the high-altitude by cable rope climbing robot, so the DC electromagnet excitation of common usefulness has inferior position on volume, weight, external power supply, property easy to detect.And adopt permanent magnet as magnetic pole, convenient, reliable, and need not additional power source, all have a clear superiority in every respect than DC electromagnet.
Compared with prior art, modularization excitation detection device of the present invention has following advantage:
1, this modularization excitation detection device can be encircled the major diameter cable to its excitation, can reach the cable uniform magnetization, magnetizes effectively, helps the generation of magnetic leakage signal.
2, detected mainly to as if stride the cable of cable-stayed bridge greatly, its cable diameters has a lot of specifications.By Wuhan Jun Shan Changjiang River Highway Bridge, its cable diameters between the 145mm, is at interval with 5mm at 95mm.By the angle between the single-unit magnetizing exciter that inserts varying number, the length of side that changes every joint magnetizing exciter, adjusting magnetizing exciter, can adapt to the cable of different-diameter.
3, this modularization excitation detection device can be by the adjusting of self, guarantee excitation and testing circuit to the distance of cable periphery about 5mm, help like this detecting faint magnetic leakage signal, after being convenient to the post-processed of cable damage signal.
4, because the advantage on this modular structure, can change angle neatly by the coupling bolt between the single-unit magnetizing exciter, can insert the single-unit magnetizing exciter of different numbers by the hole on the web member, so can change the detection that shape adapts to the measured piece of some complicated shapes neatly, as joist steel, angle steel etc.
5, adopt permanent magnet excitation mode dispense with outer connecting power, on volume, weight, ease of use and detection cost, all remarkable advantages is arranged than the active exciting method of direct current.
Description of drawings
Fig. 1 is the synoptic diagram that excitation module is encircled cable;
Fig. 2 is a single-unit magnetizing exciter synoptic diagram of the present invention;
Fig. 3 is that two joint single-unit magnetizing exciters become an angle of 90 degrees, angle steel is carried out excitation detect synoptic diagram.
Embodiment
A kind of modularization excitation detection device, comprise at least 2 joint single-unit magnetizing exciters 12 and at least therein a single-unit magnetizing exciter 12 be provided with towing bracket 11, on single-unit magnetizing exciter 12, be provided with and be used for the web member 25 that adjacent single-unit magnetizing exciter 12 is rotationally connected.The quantity of above-mentioned single-unit magnetizing exciter can determine that the quantity of single-unit magnetizing exciter can specifically can be selected 2,6,10,3 or 7 joints according to the shape and the size of measurand in 2～10 adjusting ranges.
Present embodiment is provided with hole 26 on described web member 25, in hole 26, be provided with coupling bolt 14, on web member 25, be provided with regulating tank 27, in regulating tank 27, be provided with and regulate bolt 23, and web member 25 is fixed on first magnet cover 24 or second magnet cover 29 by regulating bolt 23.
The described single-unit magnetizing exciter of present embodiment comprises magnetic bridge 21, be respectively equipped with first magnet cover 24 and second magnet cover 29 at the two ends of magnetic bridge 21, in first magnet cover 24, be provided with first permanent magnet 22, in second magnet cover 29, be provided with second permanent magnet 30, between first magnet cover 24 and second magnet cover 29, be provided with testing circuit 28, on first magnet cover 24, be provided with first window 31, on second magnet cover 29, be provided with second window 32.
Below in conjunction with accompanying drawing, the present invention is elaborated:
Excitation module is encircled the synoptic diagram of cable as shown in Figure 1, when magnetization and detection cable 13, modularization excitation device dimidiation, every half point does not have a joint magnetizing exciter 12 to link to each other with cable rope climbing robot or other haulage gears by towing bracket 11, can insert the single-unit magnetizing exciter 12 of varying number by bolt 14.Inserting the angle of 12 of the width of the concrete number of single-unit magnetizing exciter 12, every joint magnetizing exciter 12 and single-unit magnetizing exciters decides on the diameter of cable.
Single-unit magnetizing exciter synoptic diagram as shown in Figure 2, first permanent magnet 22 and second permanent magnet 30 are fixed on the two ends of magnetic bridge 21 respectively by first magnet cover 24 and second magnet cover 29, the centre of magnetic bridge 21 is testing circuits 28, be connected by bolt 23 between first magnet cover 24 and the web member 25, the position of change adjusting bolt 23 in regulating tank 27 can be realized the indentation of web member 25 and stretch out, promptly changed the width of single-unit magnetizing exciter 12.
Magnetizing exciter detects the angle steel synoptic diagram as shown in Figure 3, and when magnetization and detection angle steel 16, two joint single-unit magnetizing exciters 12 are by coupling bolt 14 connections and be adjusted to 90 degree.Can realize the abundant excitation of angle steel is also detected its magnetic leakage signal effectively.
Claims (5)
1, a kind of modularization excitation detection device, it is characterized in that, at least comprise 2 joint single-unit magnetizing exciters (12) and at least therein a single-unit magnetizing exciter (12) be provided with towing bracket (11), on single-unit magnetizing exciter (12), be provided with and be used for the web member (25) that adjacent single-unit magnetizing exciter (12) is rotationally connected.
2, modular excitation detection device according to claim 1 is characterized in that, is provided with hole (26) on described web member (25), is provided with coupling bolt (14) in hole (26).
3, modularization excitation detection device according to claim 1 and 2, it is characterized in that, the single-unit magnetizing exciter comprises magnetic bridge (21), be respectively equipped with first magnet cover (24) and second magnet cover (29) at the two ends of magnetic bridge (21), in first magnet cover (24), be provided with first permanent magnet (22), in second magnet cover (29), be provided with second permanent magnet (30), between first magnet cover (24) and second magnet cover (29), be provided with testing circuit (28).
4, modularization excitation detection device according to claim 3 is characterized in that, is provided with first window (31) on first magnet cover (24), is provided with second window (32) on second magnet cover (29).
5, modularization excitation detection device according to claim 4, it is characterized in that, on web member (25), be provided with regulating tank (27), in regulating tank (27), be provided with and regulate bolt (23), and web member (25) is fixed on first magnet cover (24) or second magnet cover (29) by regulating bolt (23).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100228385A CN101329304B (en) | 2008-07-24 | 2008-07-24 | Modularization excitation detection device |
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|---|---|---|---|
| CN2008100228385A CN101329304B (en) | 2008-07-24 | 2008-07-24 | Modularization excitation detection device |
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| CN101329304A true CN101329304A (en) | 2008-12-24 |
| CN101329304B CN101329304B (en) | 2011-08-03 |
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Cited By (12)
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| CN102180341A (en) * | 2011-03-03 | 2011-09-14 | 太原理工大学 | Scraper state detection device of scraper conveyor |
| CN102322792A (en) * | 2011-07-28 | 2012-01-18 | 刘天宜 | Concrete pole rebar quality tester and detection method by using tester |
| CN102735745A (en) * | 2012-07-09 | 2012-10-17 | 重庆大学 | Multi-probe magnetic memory detection device |
| CN103219128A (en) * | 2013-03-20 | 2013-07-24 | 华中科技大学 | Through type permanent magnetizer and magnetic flux leakage testing probe formed by permanent magnetizer |
| CN104458892A (en) * | 2014-12-08 | 2015-03-25 | 厦门大学 | Defect detecting device for steel profile |
| TWI486581B (en) * | 2013-06-14 | 2015-06-01 | ||
| CN105353027A (en) * | 2015-11-26 | 2016-02-24 | 中国海洋石油总公司 | ACFM-based chained rapid detection probe for surface defects |
| CN108318576A (en) * | 2018-02-05 | 2018-07-24 | 东南大学 | Cable steel wire testing agency based on leakage magnetic flux detection |
| CN108461680A (en) * | 2018-03-26 | 2018-08-28 | 沈阳航天新光集团有限公司 | A kind of large modular seawater battery |
| CN108654536A (en) * | 2018-05-23 | 2018-10-16 | 中国矿业大学 | A kind of DC electromagnetic type liquid magnetized experimental provision and method |
| CN109183613A (en) * | 2018-09-04 | 2019-01-11 | 香港中文大学（深圳） | A kind of cable detecting robot |
| CN113152273A (en) * | 2021-04-28 | 2021-07-23 | 重庆交通大学 | Detection device and detection method for boom diseases |
Family Cites Families (3)
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|---|---|---|---|---|
| US5321356A (en) * | 1992-05-26 | 1994-06-14 | Ndt Technologies, Inc. | Magnetic inspection device for elongated objects and inspection method |
| JP4295774B2 (en) * | 2006-07-20 | 2009-07-15 | 株式会社日立ビルシステム | Wire rope flaw detector |
| CN201229320Y (en) * | 2008-07-24 | 2009-04-29 | 东南大学 | Modularized excitation detection device |
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2008
- 2008-07-24 CN CN2008100228385A patent/CN101329304B/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180341A (en) * | 2011-03-03 | 2011-09-14 | 太原理工大学 | Scraper state detection device of scraper conveyor |
| CN102322792A (en) * | 2011-07-28 | 2012-01-18 | 刘天宜 | Concrete pole rebar quality tester and detection method by using tester |
| CN102322792B (en) * | 2011-07-28 | 2014-02-19 | 陈厚桂 | Concrete pole rebar quality tester and detection method by using tester |
| CN102735745B (en) * | 2012-07-09 | 2015-05-20 | 重庆大学 | Multi-probe magnetic memory detection device |
| CN102735745A (en) * | 2012-07-09 | 2012-10-17 | 重庆大学 | Multi-probe magnetic memory detection device |
| CN103219128B (en) * | 2013-03-20 | 2015-07-01 | 华中科技大学 | Through type permanent magnetizer and magnetic flux leakage testing probe formed by permanent magnetizer |
| CN103219128A (en) * | 2013-03-20 | 2013-07-24 | 华中科技大学 | Through type permanent magnetizer and magnetic flux leakage testing probe formed by permanent magnetizer |
| TWI486581B (en) * | 2013-06-14 | 2015-06-01 | ||
| CN104458892B (en) * | 2014-12-08 | 2018-01-02 | 厦门大学 | A kind of steel profile defect detecting device |
| CN104458892A (en) * | 2014-12-08 | 2015-03-25 | 厦门大学 | Defect detecting device for steel profile |
| CN105353027B (en) * | 2015-11-26 | 2019-08-09 | 中国海洋石油集团有限公司 | A kind of quick detection probe of surface defect chain type based on ACFM |
| CN105353027A (en) * | 2015-11-26 | 2016-02-24 | 中国海洋石油总公司 | ACFM-based chained rapid detection probe for surface defects |
| CN108318576A (en) * | 2018-02-05 | 2018-07-24 | 东南大学 | Cable steel wire testing agency based on leakage magnetic flux detection |
| CN108461680A (en) * | 2018-03-26 | 2018-08-28 | 沈阳航天新光集团有限公司 | A kind of large modular seawater battery |
| CN108654536A (en) * | 2018-05-23 | 2018-10-16 | 中国矿业大学 | A kind of DC electromagnetic type liquid magnetized experimental provision and method |
| CN109183613A (en) * | 2018-09-04 | 2019-01-11 | 香港中文大学（深圳） | A kind of cable detecting robot |
| CN109183613B (en) * | 2018-09-04 | 2024-03-01 | 香港中文大学（深圳） | Cable detection robot |
| CN113152273A (en) * | 2021-04-28 | 2021-07-23 | 重庆交通大学 | Detection device and detection method for boom diseases |
| CN113152273B (en) * | 2021-04-28 | 2022-07-29 | 重庆交通大学 | Detection device and detection method for boom diseases |
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| CN101329304B (en) | 2011-08-03 |
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