CN103454339A - Self-excited shield full magnetic information inductive detecting device - Google Patents
Self-excited shield full magnetic information inductive detecting device Download PDFInfo
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- CN103454339A CN103454339A CN2013103531864A CN201310353186A CN103454339A CN 103454339 A CN103454339 A CN 103454339A CN 2013103531864 A CN2013103531864 A CN 2013103531864A CN 201310353186 A CN201310353186 A CN 201310353186A CN 103454339 A CN103454339 A CN 103454339A
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Abstract
The invention relates to a self-excited shield full magnetic information inductive detecting device which comprises a shielding cable, a detector and a probe, wherein the detector is connected with the probe through the shielding cable; the probe comprises a shell as well as an excitation shielding unit and a detection and induction unit which are arranged on the inner wall of the shell. The excitation shielding unit is in a ring shape which is formed by connecting a plurality of rare earth permanent columnar magnets in a head-to-tail manner. The detection and induction unit consists of a plurality of sensors cascaded by magnetic bridge type electromagnets. The sensors are arranged around through holes of the shell circularly at equal intervals in a posture that the axial directions of the sensors and a tested piece, namely a steel wire rope, form crossing angles of 30-60 degrees axially. The two rings have a certain axial interval along the through holes of the shell, and both the central lines of the two rings are superposed with the central lines of the through holes formed in the shell. The device provided by the invention can completely shield interference on the tested piece caused by external magnetic fields while the tested piece is excited, and meanwhile, collects and analyzes a normal component and an axial component of damage magnetic information. The device is reliable in result, efficient and 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 accurately, easily realizes, relatively ripe detection technique.
A kind of being called as " strong magnetic detection method " wherein, while using this kind of method, must at first make tested wire rope (cable) be magnetized to saturated or hypersaturated state, then utilize detecting element be the detection wire rope (cable) such as Hall element, inductive coil or fluxgate thus surperficial outside leakage field information or realize testing goal through the flux change of coil, the shortcoming of this kind of method is:
1, can only to detect local defect be that the long-pending loss of LF or cross section metal is LMA for every kind of sensor, and can not detect this two classes damage simultaneously;
While 2, detecting, require sensor to be close to wire rope (cable) surface, instrument and equipment, easily by jam, maybe may bring personal injury and equipment loss;
3, strong magnetic detecting instrument is heavier, and the fitting operation difficulty is consuming time;
4, strong magnetic detector must be used the permanent magnetism kicker magnet, during detection or to electronics, electrical equipment cause uncertain electromagnetic pollution and interference on every side;
5, most strong magnetic detectors can not effectively be got rid of on-the-spot undesired signal.
Another kind is called as " weak magnetic detection technique ", during this utilization, after wire rope is magnetized, 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 is divided magnetization and is detected two steps and realize, thereby need to repeatedly load and unload the conversion instrument and equipment;
2, detecting element is coil pickoff, due to its dependence " weak magnetic characteristic ", while meeting inside and outside magnetic interference, detects and all may lose efficacy;
3, by " low-intensity magnetic field of loading ", inhomogeneous, non-continuous event easily being occurred, makes the testing result reliability poor;
4, antijamming capability is low causes that assorted signal is many, rate of false alarm is high;
5, the common time to time change of " weak magnetic " intensity, cause the repeatability of testing result, stability all poor.
To sum up, existing method is due to its sensor performance limitation of selecting, and the pick-up unit of making according to said method can only be obtained the single-direction magnetic signal, and the information gathered is imperfect, not comprehensive, causes the large poor reliability of degree of distortion; Although some pick-up units have adopted " high sensitive sensor ", can't get rid of interference because of the essential defect that has characterization processes, cause that the 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), issuable various damages are implemented effectively to survey.
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 be arranged on excitation screen unit and the detection sensor unit in housing, described housing is provided with the through hole that runs through the two ends, left and right, described excitation screen unit is comprised of some rare earth permanent magnet cylindrical magnets that are parallel to the housing through-hole direction, the rare earth permanent magnet cylindrical magnet is the annular of head and the tail connection and is 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 and the measured piece wirerope axis to the attitude that is 30 ° of-60 ° of angles of cut, uniformly-spaced around housing through-hole, arrange in the form of a ring each other, and the annular that in the annular that described excitation screen unit middle rare earth permanent magnetism cylindrical magnet forms and detection sensor unit, sensor forms axially has a determining deviation along housing through-hole, and the center line of two annulars that form all overlaps with the through hole center line of housing.
In described detection sensor unit, each sensor axis and measured piece wirerope axis be to the angle of cut that is 45 °, and each sensor away from an end of measured piece wire rope all towards the excitation screen unit.
In described detection sensor unit, sensor is 70mm-210mm near an end and the described excitation screen unit of measured piece wire rope near the spacing between an end of detection sensor unit.
Described housing is tubular or rectangle.
Beneficial effect:
When 1, the present invention implements the self-excitation excitation to wire rope (cable), synchronously realize anti-interference shielding, shield the interference of external magnetic field to measured piece fully; The detection sensor unit is because arrange with excitation screen unit consubstantiality, therefore the magnetic vector information that capable of dynamic synchronous quantitative detection excitation screen unit and tested wire rope (cable) are synthetic, the normal component (being equivalent to LF is local defect) of the magnetic information of collection analysis damage simultaneously and axial component (being equivalent to LMA is the long-pending loss of cross section metal);
2, the axial phase place setting at a certain angle of sensor axis and wire rope (cable) in the detection sensor unit, make the respectively synthetic by synchronous induction to component of damage information; The mutual magnetic bridge formula of some sensors cascade layout, set up the complete collection framework of three dimensions, really realized the full magnetic information of wire rope (cable) damage signal is surveyed.The degree of certainty of fault localization result is high, rate of false alarm is low; Excitation, shielding, induction, detection Multifunctional centralized are integral synchronously and carry out, and only need single job, simple and practical, efficiently convenient.
The 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, the detection sensor unit rack, 102, leg, 103, excitation screen unit support, 104, handle, 2, the detection sensor unit, 3, the excitation screen unit, 4, wire rope.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is done to further concrete detailed explanation.
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 be arranged on excitation screen unit 3 and the detection sensor unit 2 in housing 1, described housing 1 is provided with the through hole that runs through the two ends, left and right, described excitation screen unit 3 is comprised of some rare earth permanent magnet cylindrical magnets that are parallel to housing 1 through hole direction, the rare earth permanent magnet cylindrical magnet is the annular of head and the tail connection and is 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 with its axially and measured piece wire rope 4 axially be the attitude of 30 ° of-60 ° of angles of cut, each other uniformly-spaced 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 described excitation screen unit 3 middle rare earth permanent magnetism cylindrical magnets form and detection sensor unit 2, sensor forms axially has a determining deviation along housing 1 through hole, and the center line of two annulars that form all overlaps 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.
Describedly comprise that the inwall of the circular excitation screen unit 3 of some standard rare earth permanent magnet columns is 1mm≤s1≤40mm apart from wire rope 4 surface distances.Preferred 30mm<s1≤40mm, this specific embodiment, the bonding excitation screen unit inwall formed of a plurality of standard rare earth permanent magnet columns is 35mm apart from wire rope 4 surface distances.
In described detection sensor unit 2, each sensor axis and measured piece wire rope 4 axially are the angle of cut of 45 °, and each sensor away from an end of measured piece wire rope 4 all towards excitation screen unit 3, for gathering the resultant vector signal of damage magnetic information on level, vertical direction.
In described detection sensor unit 2, sensor is 70mm-210mm near an end and the described excitation screen unit 3 of measured piece wire rope 4 near the spacing between an end of detection sensor unit 2, and the present embodiment is selected 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 the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art are not within breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, 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 be arranged on excitation screen unit (3) and detection sensor unit (2) in housing (1), described housing (1) is provided with the through hole that runs through the two ends, left and right, described excitation screen unit (3) is comprised of some rare earth permanent magnet cylindrical magnets that are parallel to housing (1) through hole direction, the rare earth permanent magnet cylindrical magnet is the annular that head and the tail connect, and be 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 with its axially and measured piece wire rope (4) axially be the attitude of 30 ° of-60 ° of angles of cut, each other uniformly-spaced in the form of a ring around housing (1) via arrangement, and the annular that in the annular that described excitation screen unit (3) middle rare earth permanent magnetism cylindrical magnet forms and detection sensor unit (2), sensor forms axially has a determining deviation along housing (1) through hole, and the center line of two annulars that form all overlaps 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) axially are the angle of cut of 45 °, and each sensor away from an 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, and it is characterized in that: in described detection sensor unit (2), sensor is 70mm-210mm near an end and the described excitation screen unit (3) of measured piece wire rope (4) near the spacing between an end of detection sensor unit (2).
4. a kind of autoexcitation according to claim 1 shields full magnetic information induction sniffer, and it is characterized in that: described housing (1) is tubular or rectangle.
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| CN201310353186.4A CN103454339B (en) | 2013-08-14 | 2013-08-14 | A kind of autoexcitation shields full magnetic information induction sniffer |
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| CN201310353186.4A CN103454339B (en) | 2013-08-14 | 2013-08-14 | A kind of autoexcitation shields full magnetic information induction sniffer |
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| CN103454339B CN103454339B (en) | 2015-10-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107907874A (en) * | 2017-12-14 | 2018-04-13 | 南京铭创测控科技有限公司 | The balancing device of hole slot 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107907874A (en) * | 2017-12-14 | 2018-04-13 | 南京铭创测控科技有限公司 | The balancing device of hole slot detection probe |
| 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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| CN103454339B (en) | 2015-10-28 |
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