CN103454339B - A kind of autoexcitation shields full magnetic information induction sniffer - Google Patents
A kind of autoexcitation shields full magnetic information induction sniffer Download PDFInfo
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- CN103454339B CN103454339B CN201310353186.4A CN201310353186A CN103454339B CN 103454339 B CN103454339 B CN 103454339B CN 201310353186 A CN201310353186 A CN 201310353186A CN 103454339 B CN103454339 B CN 103454339B
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Abstract
A kind of autoexcitation shields full magnetic information induction sniffer, comprise shielded cable, detector and probe, detector is connected with probe by shielded cable, probe comprises housing, and be arranged on excitation screen unit and the detection sensor unit of inner walls, the annular that excitation screen unit is connected in head and the tail by some rare earth permanent magnet cylindrical magnets, detection sensor unit by some sensors with the cascade of magnetic bridge formula electromagnetism, each sensor with its axially with measured piece wirerope axis to the attitude in 30 ° of-60 ° of angles of cut, arrange around housing through-hole in the form of a ring at equal intervals each other, two annulars are at regular intervals along the axial tool of housing through-hole, and two annular center lines all overlap with the through hole center line be located on housing.The present invention can shield external magnetic field completely to the interference of measured piece and the normal component of simultaneously collection analysis damage magnetic information and axial component while encouraging measured piece, reliable results, efficiently convenient.
Description
Technical field
The present invention relates to a kind of the cannot-harm-detection device, the cannot-harm-detection device of especially a kind of wire rope (cable).
Background technology
At present, in wire rope (cable) damage check field, the detection technique based on magnetic principle is more common, belongs to comparatively accurate, easily realization, relative maturity detection technique.
Wherein one is called as " strong magnetic detection method ", when using this kind of method, tested wire rope (cable) must be first made to be magnetized to saturated or hypersaturated state, then utilize detecting element and Hall element, inductive coil or fluxgate etc. detect wire rope (cable) surface external leakage field information or pass the flux change of coil thus realize testing goal, the shortcoming of this kind of method is:
1, often kind of sensor can only detect the long-pending loss of local defect and LF or cross section metal and LMA, and can not detect the damage of this two class simultaneously;
Require when 2, detecting that wire rope (cable) surface is close to by sensor, instrument and equipment, easily by jam, maybe may bring personal injury and equipment loss;
3, strong Magnetic testi instrument is heavier, installs operating difficulties consuming time;
4, strong Magnetic testi instrument must use permanent magnetism kicker magnet, causes uncertain electromagnetic pollution and interference during detection or to ambient electron, electrical equipment;
5, most strong Magnetic testi instrument can not effectively be got rid of the undesired signal at scene.
Another kind is called as " weak Magnetic testi technology ", when this technology uses, after magnetizing wire rope, utilizes wire rope to be detected by " low-intensity magnetic field of loading ".The shortcoming of this kind of detection method is:
1, testing process divides magnetization and detection two steps to realize, and thus needs repeatedly to load and unload transduction equipment equipment;
2, detecting element is coil pickoff, because it relies on " weak magnetic characteristic ", detects and all may lose efficacy when meeting inside and outside magnetic interference;
3, by " low-intensity magnetic field of loading " easily uneven, non-continuous event, make testing result reliability poor;
4, antijamming capability is low causes that assorted signal is many, rate of false alarm is high;
5, the usual time to time change of " weak magnetic " intensity, causes the repeatability of testing result, stability all poor.
To sum up, the sensor performance limitation that existing method is selected due to it, can only obtain single-direction magnetic signal according to the pick-up unit that said method makes, and the information gathered is imperfect, not comprehensive, causes the large poor reliability of degree of distortion; Although some pick-up units have employed " high sensitive sensor ", because of exist characterization processes essential defect and cannot exclusive PCR, cause that testing result degree of certainty is low, rate of false alarm is high, poor stability.
Summary of the invention
In order to solve the problems of the technologies described above
,the invention provides a kind of autoexcitation and shield full magnetic information induction detection side device, in can using for wire rope (cable), effectively detection is implemented in issuable various damage.
The present invention in order to solve the problems of the technologies described above adopted technical scheme is: a kind of autoexcitation shields full magnetic information induction sniffer, comprise shielded cable, detector and probe, detector is connected with probe by shielded cable, described probe comprises housing, and the excitation screen unit be arranged in housing and detection sensor unit, described housing is provided with the through hole running through two ends, left and right, described excitation screen unit is made up of some rare earth permanent magnet cylindrical magnets being parallel to housing through-hole direction, the annular that rare earth permanent magnet cylindrical magnet connects in head and the tail is also connected with the inwall of housing by excitation screen unit support, described detection sensor unit by some sensors with the cascade of magnetic bridge formula electromagnetism, each sensor with its axially with measured piece wirerope axis to the attitude in 30 ° of-60 ° of angles of cut, arrange around housing through-hole in the form of a ring at equal intervals each other, and the annular that in the annular that forms of described excitation screen unit middle rare earth permanent magnetism cylindrical magnet and detection sensor unit, sensor is formed is at regular intervals along the axial tool of housing through-hole, and two that form annular center lines all overlap with the through hole center line of housing.
In described detection sensor unit, each sensor axis and measured piece wirerope axis are in the angle of cut of 45 °, and each sensor away from one end of measured piece wire rope all towards excitation screen unit.
In described detection sensor unit, near one end of measured piece wire rope and described excitation screen unit, the spacing between one end of detection sensor unit is 70mm-210mm to sensor.
Described housing is tubular or rectangle.
Beneficial effect:
1, while the present invention implements self-excitation excitation to wire rope (cable), synchronously realize anti-interference shielding, shield external magnetic field completely to the interference of measured piece; Detection sensor unit is because arrange with excitation screen unit consubstantiality, therefore the magnetic vector information that dynamic synchronous quantitative detection excitation screen unit and tested wire rope (cable) synthesize, normal component (being equivalent to LF and local defect) and the axial component (being equivalent to LMA and the long-pending loss of cross section metal) of magnetic information can be damaged by collection analysis simultaneously;
2, in detection sensor unit, sensor axis and the axial phase place at a certain angle of wire rope (cable) are arranged, and make each of damage information synchronously be responded to synthesis to component; Some sensors mutual magnetic bridge formula cascade layout, establishes the complete collection framework of three dimensions, really achieves the full magnetic information detection to wire rope (cable) damage signal.The degree of certainty of fault localization result is high, rate of false alarm is low; Excitation, shielding, induction, detection multifunctional unit integrated synchronous carry out, and only need single job, simple and practical, efficiently convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention pops one's head in.
Fig. 2 is after Fig. 1 removes housing, the side view of excitation screen unit and detection sensor unit.
In figure, 1, housing, 101, detection sensor unit rack, 102, leg, 103, excitation screen unit support, 104, handle, 2, detection sensor unit, 3, excitation screen unit, 4, wire rope.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete detailed description is further done to the present invention.
As shown in the figure, comprise shielded cable, detector (shielded cable and detector are not shown in the drawings) and probe, detector is connected with probe by shielded cable, described probe comprises housing 1, and the excitation screen unit 3 be arranged in housing 1 and detection sensor unit 2, described housing 1 is provided with the through hole running through two ends, left and right, described excitation screen unit 3 is made up of some rare earth permanent magnet cylindrical magnets being parallel to housing 1 through hole direction, the annular that rare earth permanent magnet cylindrical magnet connects in head and the tail is also connected with the inwall of housing 1 by excitation screen unit support 103, described detection sensor unit 2 by some sensors with the cascade of magnetic bridge formula electromagnetism, each sensor is with its axial attitude in 30 °-60 ° angles of cut axial with measured piece wire rope 4, each other at equal intervals in the form of a ring around housing 1 via arrangement, it is connected with housing 1 inwall by detection sensor unit rack 101, and the annular that in the annular that forms of described excitation screen unit 3 middle rare earth permanent magnetism cylindrical magnet and detection sensor unit 2, sensor is formed is at regular intervals along the axial tool of housing 1 through hole, and two the annular center lines formed all overlap with the through hole center line of housing 1.
Described housing 1 is tubular or rectangle, and the present embodiment housing 1 is tubular.
The rare earth permanent magnet cylindrical magnet of the present embodiment is standard rare earth permanent magnet column.
Described inwall distance wire rope 4 surface distance comprising the circular excitation screen unit 3 of some standard rare earth permanent magnet columns is 1mm≤s1≤40mm.Preferred 30mm < s1≤40mm, this specific embodiment, bonding excitation screen unit inwall distance wire rope 4 surface distance of multiple standard rare earth permanent magnet column is 35mm.
In described detection sensor unit 2, each sensor axis and measured piece wire rope 4 are axially in the angle of cut of 45 °, and each sensor away from one end of measured piece wire rope 4 all towards excitation screen unit 3, for gathering the resultant vector signal of damage magnetic information in level, vertical direction.
In described detection sensor unit 2, near one end of measured piece wire rope 4 and described excitation screen unit 3, the spacing between one end of detection sensor unit 2 is 70mm-210mm to sensor, and the present embodiment selects 140mm.
The outer wall of described housing 1 is provided with in order to passive leg 102 and the handle 104 in order to be convenient for carrying.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art are not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (4)
1. an autoexcitation shields full magnetic information induction sniffer, comprise shielded cable, detector and probe, detector is connected with probe by shielded cable, it is characterized in that: described probe comprises housing (1), and the excitation screen unit (3) be arranged in housing (1) and detection sensor unit (2), described housing (1) is provided with the through hole running through two ends, left and right, described excitation screen unit (3) is made up of some rare earth permanent magnet cylindrical magnets being parallel to housing (1) through hole direction, the annular that rare earth permanent magnet cylindrical magnet connects in head and the tail, and be connected by the inwall of excitation screen unit support (103) with housing (1), described detection sensor unit (2) by some sensors with the cascade of magnetic bridge formula electromagnetism, each sensor is with its axial attitude in 30 °-60 ° angles of cut axial with measured piece wire rope (4), each other at equal intervals in the form of a ring around housing (1) via arrangement, and the annular that in the annular that forms of described excitation screen unit (3) middle rare earth permanent magnetism cylindrical magnet and detection sensor unit (2), sensor is formed is at regular intervals along the axial tool of housing (1) through hole, and two that form annular center lines all overlap with the through hole center line of housing (1).
2. a kind of autoexcitation according to claim 1 shields full magnetic information induction sniffer, it is characterized in that: in described detection sensor unit (2), each sensor axis and measured piece wire rope (4) are axially in the angle of cut of 45 °, and each sensor away from one end of measured piece wire rope (4) all towards excitation screen unit (3).
3. a kind of autoexcitation according to claim 1 shields full magnetic information induction sniffer, it is characterized in that: in described detection sensor unit (2), near one end of measured piece wire rope (4) and described excitation screen unit (3), the spacing between one end of detection sensor unit (2) is 70mm-210mm to sensor.
4. a kind of autoexcitation according to claim 1 shields full magnetic information induction sniffer, it is characterized in that: described housing (1) is tubular or rectangle.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106959337A (en) * | 2017-05-03 | 2017-07-18 | 河南科技大学 | The open magnetic pumping damage of steel cable detecting system that declines of one kind |
| CN107907874B (en) * | 2017-12-14 | 2024-02-09 | 南京铭创测控科技有限公司 | Balancing device of hole and groove detection probe |
| CN108089069A (en) * | 2018-01-09 | 2018-05-29 | 南京南瑞集团公司 | A kind of combined electromagnetic signal shielding device of automobile applied to the long cable Space-charge distribution measuring of DC ultra-high-voltage |
| CN108709928A (en) * | 2018-08-30 | 2018-10-26 | 洛阳泰斯特探伤技术有限公司 | A kind of single rope Internet of Things probe apparatus |
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| CN2575674Y (en) * | 2002-11-01 | 2003-09-24 | 华中科技大学 | Signal amplitude converter |
| CN101839891A (en) * | 2009-03-06 | 2010-09-22 | 株式会社日立建筑系统 | The failure detector of wire rope |
| CN102243212A (en) * | 2011-05-04 | 2011-11-16 | 山西潞安环保能源开发股份有限公司漳村煤矿 | Wire rope on-line detector |
| CN203432941U (en) * | 2013-08-14 | 2014-02-12 | 洛阳泰斯特探伤技术有限公司 | Self-excitation inductive detection device capable of shielding all-magnetic information |
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| JP4500437B2 (en) * | 2000-12-15 | 2010-07-14 | 株式会社日立ビルシステム | Wire rope damage detection device |
| KR101192286B1 (en) * | 2011-02-09 | 2012-10-17 | 한국표준과학연구원 | Device for detecting LF and LMA of wire rope |
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| CN2575674Y (en) * | 2002-11-01 | 2003-09-24 | 华中科技大学 | Signal amplitude converter |
| CN101839891A (en) * | 2009-03-06 | 2010-09-22 | 株式会社日立建筑系统 | The failure detector of wire rope |
| CN102243212A (en) * | 2011-05-04 | 2011-11-16 | 山西潞安环保能源开发股份有限公司漳村煤矿 | Wire rope on-line detector |
| CN203432941U (en) * | 2013-08-14 | 2014-02-12 | 洛阳泰斯特探伤技术有限公司 | Self-excitation inductive detection device capable of shielding all-magnetic information |
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