CN111044607B - Improved generation quadrature electric disturbance moves vortex sensor - Google Patents
Improved generation quadrature electric disturbance moves vortex sensor Download PDFInfo
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- CN111044607B CN111044607B CN201911369449.4A CN201911369449A CN111044607B CN 111044607 B CN111044607 B CN 111044607B CN 201911369449 A CN201911369449 A CN 201911369449A CN 111044607 B CN111044607 B CN 111044607B
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Abstract
The invention discloses an improved orthogonal electric disturbance vortex sensor, which is characterized in that the structure of a conventional orthogonal vortex probe is improved, namely, two vortex detection coils which are wound in an orthogonal mode are respectively changed into two vortex detection coils which are coaxially and parallelly arranged, the two vortex detection coils which are coaxially and parallelly arranged are connected to an output detection circuit in a differential input mode, and when in detection, a group of vortex detection coils which are only perpendicular to the advancing direction in the sensor has the detection function by fast switching of an electronic change-over switch, namely, the detection function of a group of vortex detection coils which are parallel to the advancing direction of the sensor is cancelled, so that the sensor has the function of detecting hole defects.
Description
Technical Field
The invention relates to an eddy current detection sensor, in particular to an improved orthogonal electric disturbance eddy current sensor.
Background
The orthogonal current disturbance vortex sensor is used for detecting welding seams and the like, is relatively mature, and after the international British (European Union) standard EN1711 is exported, china is also exported to the national standard GB/T26954 related to welding seam vortex detection, which greatly promotes the application of the novel sensor technology. Particularly in the aspects of in-service metal components, equipment and detection of on-line metal pipes, bars, wires and plates, the sensor is widely applied due to the great advantage of small lift-off noise. However, the sensor has the technical defects that firstly, the sensor is sensitive to cracks on the metal surface, but the sensor is a detection blind area for the cracks forming an angle of 45 degrees with the travelling direction; secondly, the detection sensitivity is lower than that of a conventional eddy current point probe, and particularly the probe is extremely insensitive to hole defects.
In order to solve the technical defect of 45-degree direction crack blind areas of the conventional orthogonal sensor, chinese patent CN102879461B 'a non-directional electromagnetic detection sensor based on a cross-linking differential detection principle', adopts a cross-linking combined probe and a differential mixing algorithm principle, and the sensor is formed by two groups of cross-shaped differential detection coil groups which are different in 45-degree angle and concentrically wound on a coil winding framework, so that the problem of 45-degree direction crack blind areas of the differential electromagnetic detection sensor formed by cross orthogonality of two detection coils is solved, and detection without omission is realized. The technology is widely applied in the fields of aerospace, aviation, railways, ships, electric power and the like, brings very remarkable social and economic benefits, and particularly solves the problem that 45-degree crack omission is caused in the quality of Chinese air force and naval weaponry in the in-service detection for a long time. However, in practical application, the method is extremely insensitive to hole defects, and detection of the defects cannot be realized. The existence of the hole-like defects not only affects the appearance, but also easily causes stress concentration, embrittlement and the like, fatigue cracks are generated and spread, and the strength and impact performance of the material are reduced, so that it is necessary to improve the existing orthogonal current disturbance vortex sensor to realize detection of the hole-like defects.
Disclosure of Invention
The object of the present invention is to solve the problems mentioned in the background section above by means of an improved quadrature electrical disturbance eddy current sensor.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an improved generation quadrature electric interference vortex sensor, includes mutually perpendicular's vortex detection coil L and vortex detection coil T, its characterized in that: the eddy current detection coil L consists of an eddy current detection coil L1 and an eddy current detection coil L1', wherein a terminal end of the winding of the eddy current detection coil L1 is connected with a starting end of the winding of the eddy current detection coil L1', and the eddy current detection coil L1' are coaxial and are arranged in parallel; the eddy current detection coil L1 and the eddy current detection coil L1' are connected to an output detection circuit in a differential input mode; the eddy current detection coil T consists of an eddy current detection coil T2 and an eddy current detection coil T2', a terminal end of the winding of the eddy current detection coil T2 is connected with a starting end of the winding of the eddy current detection coil T2', and the eddy current detection coil T2' are coaxial and are arranged in parallel; the eddy current detection coil T2 and the eddy current detection coil T2' are connected to an output detection circuit in a differential input mode; during detection, through the fast switching of the electronic change-over switch, only one group of eddy current detection coils perpendicular to the advancing direction in the sensor has the function of detection, namely the detection function of one group of eddy current detection coils parallel to the advancing direction of the sensor is canceled, so that the sensor has the function of detecting hole defects.
The size, shape and number of turns of the eddy current detection coil L1, the eddy current detection coil L1', the eddy current detection coil T2 and the eddy current detection coil T2' are the same; the interval between the eddy current detecting coil L1 and the eddy current detecting coil L1 'is the same as the interval between the eddy current detecting coil T2 and the eddy current detecting coil T2'.
The improved orthogonal electric disturbance eddy current sensor has the beneficial effects that through improving the structure of a conventional orthogonal eddy current probe, two eddy current detection coils which are wound in an orthogonal mode are respectively changed into two eddy current detection coils which are coaxially and parallelly arranged, the two eddy current detection coils which are coaxially and parallelly arranged are connected to an output detection circuit in a differential input mode, and during detection, the function of detecting only one group of eddy current detection coils which are perpendicular to the advancing direction in the sensor is realized through the rapid switching of an electronic switch, namely the detection function of one group of eddy current detection coils which are parallel to the advancing direction of the sensor is cancelled, so that the sensor has the function of detecting hole defects.
The present invention is described in further detail below with reference to examples, but the present invention is not limited to the examples.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic diagram of an improved quadrature electrical disturbance eddy current sensor configuration in accordance with an embodiment of the invention.
Fig. 2 is a schematic diagram of fast switching of eddy current testing coils in a sensor according to an embodiment of the invention.
In the figure, l.eddy current detecting coils L, t.eddy current detecting coils T, L1' eddy current detecting coils L1', T2'.
Detailed Description
An embodiment, as shown in fig. 1 and 2, an improved orthogonal electric disturbance eddy current sensor includes an eddy current detecting coil L and an eddy current detecting coil T perpendicular to each other, and is characterized in that: the eddy current detection coil L consists of an eddy current detection coil L1 and an eddy current detection coil L1', wherein a terminal end of the winding of the eddy current detection coil L1 is connected with a starting end of the winding of the eddy current detection coil L1', and the eddy current detection coil L1' are coaxial and are arranged in parallel; the eddy current detection coil L1 and the eddy current detection coil L1' are connected to an output detection circuit in a differential input mode; the eddy current detection coil T consists of an eddy current detection coil T2 and an eddy current detection coil T2', a terminal end of the winding of the eddy current detection coil T2 is connected with a starting end of the winding of the eddy current detection coil T2', and the eddy current detection coil T2' are coaxial and are arranged in parallel; the eddy current detection coil T2 and the eddy current detection coil T2' are connected to an output detection circuit in a differential input mode; during detection, through the fast switching of the electronic change-over switch, only one group of eddy current detection coils perpendicular to the advancing direction in the sensor has the function of detection, namely the detection function of one group of eddy current detection coils parallel to the advancing direction of the sensor is canceled, so that the sensor has the function of detecting hole defects.
The size, shape and number of turns of the eddy current detection coil L1, the eddy current detection coil L1', the eddy current detection coil T2 and the eddy current detection coil T2' are the same; the interval between the eddy current detecting coil L1 and the eddy current detecting coil L1 'is the same as the interval between the eddy current detecting coil T2 and the eddy current detecting coil T2'.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, but any modifications, equivalents and improvements made by those skilled in the art without departing from the spirit of the present invention, should fall within the scope of protection defined by the appended claims.
Claims (1)
1. The utility model provides an improved generation quadrature electric interference vortex sensor, includes mutually perpendicular's vortex detection coil L and vortex detection coil T, its characterized in that: the eddy current detection coil L consists of an eddy current detection coil L1 and an eddy current detection coil L1', wherein a terminal end of the winding of the eddy current detection coil L1 is connected with a starting end of the winding of the eddy current detection coil L1', and the eddy current detection coil L1' are coaxial and are arranged in parallel; the eddy current detection coil L1 and the eddy current detection coil L1' are connected to an output detection circuit in a differential input mode; the eddy current detection coil T consists of an eddy current detection coil T2 and an eddy current detection coil T2', a terminal end of the winding of the eddy current detection coil T2 is connected with a starting end of the winding of the eddy current detection coil T2', and the eddy current detection coil T2' are coaxial and are arranged in parallel; the size, shape and number of turns of the eddy current detection coil L1, the eddy current detection coil L1', the eddy current detection coil T2 and the eddy current detection coil T2' are the same; the interval between the eddy current detection coil L1 and the eddy current detection coil L1 'is the same as the interval between the eddy current detection coil T2 and the eddy current detection coil T2'; the eddy current detection coil T2 and the eddy current detection coil T2' are connected to an output detection circuit in a differential input mode; during detection, through the fast switching of the electronic change-over switch, only one group of eddy current detection coils perpendicular to the advancing direction in the sensor has the function of detection, namely the detection function of one group of eddy current detection coils parallel to the advancing direction of the sensor is canceled, so that the sensor has the function of detecting hole defects.
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| CN201911369449.4A CN111044607B (en) | 2019-12-26 | 2019-12-26 | Improved generation quadrature electric disturbance moves vortex sensor |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4706021A (en) * | 1983-08-08 | 1987-11-10 | The Charles Stark Draper Laboratory, Inc. | Crossed wire defect detector employing eddy currents |
| US6822443B1 (en) * | 2000-09-11 | 2004-11-23 | Albany Instruments, Inc. | Sensors and probes for mapping electromagnetic fields |
| CN1559011A (en) * | 2001-08-03 | 2004-12-29 | Method and apparatus for a multi-component induction instrument measuring system for geosteering and formation resistivity data interpretation in horizontal, vertical and deviated wells | |
| WO2009037954A1 (en) * | 2007-09-20 | 2009-03-26 | Nuclear Engineering, Ltd. | Eddy-current flaw detecting method, eddy-current flaw detecting device, and eddy-current flaw detecting probe |
| JP2009092549A (en) * | 2007-10-10 | 2009-04-30 | Hitachi Ltd | Eddy current inspection probe and eddy current inspection apparatus |
| CN104880508A (en) * | 2015-04-13 | 2015-09-02 | 北京理工大学 | Orthogonal rotation exciting field eddy current transducer |
| CN108872368A (en) * | 2018-07-24 | 2018-11-23 | 爱德森（厦门）电子有限公司 | A kind of non-directional orthogonal eddy current testing device of modified |
| CN110095528A (en) * | 2019-05-07 | 2019-08-06 | 南京逐路电子科技有限公司 | Orthogonal rotation Eddy Inspection System |
| JP2019138871A (en) * | 2018-02-15 | 2019-08-22 | 株式会社東芝 | Eddy-current flaw detection device and eddy-current flaw detection method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6734668B2 (en) * | 2002-10-02 | 2004-05-11 | Zetec, Inc. | Eddy current probe having diagonal magnetic fields alternating between posts at corners of orthogonal solenoid coils |
| JP6472334B2 (en) * | 2015-06-03 | 2019-02-20 | 日立Ｇｅニュークリア・エナジー株式会社 | Eddy current inspection device |
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- 2019-12-26 CN CN201911369449.4A patent/CN111044607B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4706021A (en) * | 1983-08-08 | 1987-11-10 | The Charles Stark Draper Laboratory, Inc. | Crossed wire defect detector employing eddy currents |
| US6822443B1 (en) * | 2000-09-11 | 2004-11-23 | Albany Instruments, Inc. | Sensors and probes for mapping electromagnetic fields |
| CN1559011A (en) * | 2001-08-03 | 2004-12-29 | Method and apparatus for a multi-component induction instrument measuring system for geosteering and formation resistivity data interpretation in horizontal, vertical and deviated wells | |
| WO2009037954A1 (en) * | 2007-09-20 | 2009-03-26 | Nuclear Engineering, Ltd. | Eddy-current flaw detecting method, eddy-current flaw detecting device, and eddy-current flaw detecting probe |
| JP2009092549A (en) * | 2007-10-10 | 2009-04-30 | Hitachi Ltd | Eddy current inspection probe and eddy current inspection apparatus |
| CN104880508A (en) * | 2015-04-13 | 2015-09-02 | 北京理工大学 | Orthogonal rotation exciting field eddy current transducer |
| JP2019138871A (en) * | 2018-02-15 | 2019-08-22 | 株式会社東芝 | Eddy-current flaw detection device and eddy-current flaw detection method |
| CN108872368A (en) * | 2018-07-24 | 2018-11-23 | 爱德森（厦门）电子有限公司 | A kind of non-directional orthogonal eddy current testing device of modified |
| CN110095528A (en) * | 2019-05-07 | 2019-08-06 | 南京逐路电子科技有限公司 | Orthogonal rotation Eddy Inspection System |
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