CN107830797B - Large-range eddy current sensor for pipeline deformation detection and manufacturing method thereof - Google Patents
Large-range eddy current sensor for pipeline deformation detection and manufacturing method thereof Download PDFInfo
- Publication number
- CN107830797B CN107830797B CN201711150916.5A CN201711150916A CN107830797B CN 107830797 B CN107830797 B CN 107830797B CN 201711150916 A CN201711150916 A CN 201711150916A CN 107830797 B CN107830797 B CN 107830797B
- Authority
- CN
- China
- Prior art keywords
- sensor
- sensor coil
- rectangle
- signal processing
- eddy current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 29
- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000004806 packaging method and process Methods 0.000 claims abstract description 12
- 230000006698 induction Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 6
- 239000012945 sealing adhesive Substances 0.000 claims description 5
- 239000000565 sealant Substances 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229920006332 epoxy adhesive Polymers 0.000 claims description 2
- 238000000034 method Methods 0.000 description 10
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
A wide-range eddy current sensor for pipeline deformation detection and a manufacturing method thereof, wherein the eddy current sensor comprises: a sensor base, the bottom of which is provided with a groove; the sensor coil is arranged on the top surface of the sensor base and is used for sending out induction signals and receiving detection signals; the packaging cover is arranged on the sensor coil in a covering mode and packages the sensor coil on the top surface of the sensor base; and the signal processing circuit component is accommodated in the groove and sealed, and receives detection signals obtained by the sensor coil for signal processing, wherein the section of the sensor coil in a winding plane is a first rectangle.
Description
Technical Field
The invention relates to the field of pipeline nondestructive detection, in particular to a wide-range eddy current sensor for pipeline deformation detection and a manufacturing method thereof.
Background
The pipeline deformation detector is special equipment for in-service pipeline detection, wherein the sensor is a core element for detecting the deformation amount of the sensor. At present, a mechanical contact type sensor is adopted in a sensor for detecting pipeline deformation, and the corrosion-resistant layer on the inner wall of a detected pipeline can be damaged to different degrees. The non-contact type eddy current sensor is a better solution for replacing a mechanical contact type sensor, but the detection range of the current mature eddy current sensor is only 50mm at maximum, and in practice, the maximum deformation of a phi 1219mm pipeline can reach 150mm, and the current mature eddy current sensor cannot meet the deformation measurement range of the phi 1219mm pipeline or more. Therefore, there is a need to develop a wide-range non-touch eddy current sensor.
Disclosure of Invention
In view of the above technical problems, the present invention provides a wide-range non-touch eddy current sensor and a method for manufacturing the same in order to overcome the above drawbacks of the prior art.
According to one aspect of the present invention, there is provided an eddy current sensor comprising: a sensor base, the bottom of which is provided with a groove; the sensor coil is arranged on the top surface of the sensor base and is used for sending out induction signals and receiving detection signals; the packaging cover is arranged on the sensor coil in a covering mode and packages the sensor coil on the top surface of the sensor base; and the signal processing circuit component is accommodated in the groove and sealed, and receives detection signals obtained by the sensor coil for signal processing, wherein the section of the sensor coil in a winding plane is a first rectangle.
In some embodiments, the first rectangle has an aspect ratio of 1.5 to 5/3.
In some embodiments, the signal processing circuit assembly is sealed with a high pressure resistant sealant comprised of a two-component room temperature curing epoxy.
In some embodiments, the sensor base has a second rectangle in cross-section in the plane of the sensor coil windings, the second rectangle having a length and width substantially equal to the length and width of the first rectangle, respectively.
In some embodiments, the detection signal is a voltage V, which corresponds to a detected distance x of formula 1:
V＝k×e -0.04x +b, wherein k, x and b are real numbers and 0.5.ltoreq.k.ltoreq.1, -3.ltoreq.b.ltoreq.1, -0.ltoreq.x.ltoreq.150 mm, the slope of the curve corresponding to formula 1 is negative and as x increases gradually, the slopeThe absolute value becomes smaller gradually, and the detected distance x is determined according to the value of the detection signal voltage V.
In some embodiments, when the absolute value of the slope is less than the threshold r, the multiplied voltage V' of the detection signal voltage V corresponds to the detected distance x according to equation 2:
V＝k′×e -0.04x +b, wherein k ' and N are real numbers, k ' =Nk, 3.ltoreq.N.ltoreq.10, T.ltoreq.x.ltoreq.150mm, T is the value of x corresponding to the absolute value of the slope of the curve corresponding to formula 1 as threshold r, and the detected distance x is determined according to the value of the multiplied voltage V '.
According to another aspect of the present invention, there is provided a method for manufacturing an eddy current sensor, including: a groove is arranged at the bottom of the sensor base; arranging a sensor coil on the top surface of a sensor base, and packaging the sensor coil on the top surface of the sensor base by adopting a packaging cover; and the signal processing circuit component is accommodated and sealed in the groove, and the section of the sensor coil in the winding plane is a first rectangle.
In some embodiments, the housing and sealing the signal processing circuit assembly within the recess comprises: the signal processing circuit component is accommodated in the groove; preparing high-pressure-resistant sealing adhesive by adopting a two-component room-temperature curing epoxy adhesive; filling and sealing the prepared high-pressure-resistant sealing adhesive into the groove while stirring, so as to avoid air bubbles and completely cover the signal processing circuit component; and curing the encapsulated sensor base with the bottom surface facing upwards for more than 20 hours in a room temperature environment.
In some embodiments, the first rectangle has an aspect ratio of 1.5 to 5/3.
In some embodiments, the sensor base has a second rectangle in cross-section in the plane of the sensor coil windings, the second rectangle having a length and width substantially equal to the length and width of the first rectangle, respectively.
From the above technical scheme, the invention has at least the following beneficial effects:
the section of the sensor coil in the winding plane is rectangular, and the sensor coil has higher measurement precision and larger detection range compared with a sensor coil with a circular section with the same area;
the high-pressure-resistant sealant is adopted to encapsulate the signal processing circuit component to form the eddy current sensor, so that the eddy current sensor has pressure resistance and can bear 15Mpa pressure;
the detected distance x is obtained by acquiring the value of the detection signal voltage V based on the signal curve, and for the portion where the absolute value of the slope of the signal curve is smaller than the threshold value, the detected distance x is obtained by acquiring the value of the multiplication voltage value V' of the detection signal voltage V, thereby improving the detection accuracy.
Drawings
FIG. 1 is a schematic diagram of an eddy current sensor according to one embodiment of the invention;
FIG. 2 is a diagram showing the correspondence between detection signals and detection distances;
FIG. 3 is a flow chart illustrating a method of fabricating an eddy current sensor in accordance with another embodiment of the invention.
Detailed Description
Some embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
An embodiment of the invention provides an eddy current sensor, which comprises a sensor base, a sensor coil, a packaging cover and a signal processing circuit component. The signal processing component can be a circuit board, the eddy current sensor can be used for non-contact detection in the pipeline, and deformation of the detected pipeline can be detected in a non-contact mode by detecting the distance between the eddy current sensor arranged in the metal pipe to be detected and the metal pipe wall.
Fig. 1 is a schematic structural diagram of an eddy current sensor according to an embodiment of the invention, and as shown in fig. 1, an eddy current sensor 100 includes a sensor base 10, a sensor coil 20, a package cover 30, and a signal processing circuit assembly 40. The sensor base 10 is of a columnar structure, the bottom of the sensor base 10 is provided with a groove 11, the sensor coil 20 is arranged on the top surface of the sensor base 10, the packaging cover 30 covers the sensor coil 20 and wraps the sensor coil 20, the sensor coil 20 is packaged on the top surface of the sensor base 10 and used for protecting the sensor coil 20, and the packaging cover 30 can be combined with the top surface of the sensor base 10 in a welding or bonding mode. The signal processing circuit assembly 40 is accommodated and sealed in the groove 11 at the bottom of the sensor base 10, and is used for generating an induction signal for exciting the sensor coil 20, receiving the detection signal of the sensor coil, and performing signal processing to obtain the distance from the metal pipe wall detected by the eddy current sensor 100. The sensor base 10 and the package cover 30 may be made of a non-metal insulating material, such as a resin material, for example, polyurethane, in order to avoid interference with signals of the eddy current sensor.
The sensor coil 20 can be wound by copper wires, the measured value is the average value in the detection range, the section of the sensor coil 20 in the winding plane can be round or rectangular or other shapes, and the manufacturing process of the sensor coil adopting the round section is relatively simple. For the sensor coil with the circular section formed by adopting the same wire winding, the larger the area of the sensor coil is, the larger the measuring range is, but the larger the detection range (when the sensor coil is positioned at the same position of the metal tube to be detected, the detection range is the wall area of the metal tube to be detected by the sensor coil) is, and the lower the detection precision is. According to the prior art, the measuring range/coil diameter is usually in the range of 0.6-1, and the diameter of a large-range sensor coil is usually too large to be suitable for metal pipeline detection. In an embodiment, a rectangular winding section may be used, which is approximately the same as the measuring range of a sensor coil with the same cross-sectional area and a circular winding section, but has a smaller detection range than a sensor coil with the same cross-sectional area and a circular winding section, so that higher detection accuracy can be obtained. In view of the feasibility of the processing technique thereof, it is preferable to use a sensor coil having a rectangular cross section with an aspect ratio in the range of 1.5 to 5/3, which has a high detection accuracy while obtaining a large detection range, and whose range may be 150mm or more.
The cross section of the sensor base 10 in the winding plane of the sensor coil 20 has the same or similar shape as the cross section of the sensor 20, and when both are rectangular, the length and width of the cross section of the sensor base 10 in the winding plane of the sensor coil 20 may be substantially equal to or slightly greater than the length and width of the cross section of the sensor coil 20 in the winding plane thereof, respectively.
The signal processing circuit assembly 40 may be a circuit board that is received in the recess 11 and is sealed with a high pressure resistant sealant 50 that is composed of a two-component room temperature curing epoxy. The eddy current sensor with the structure can resist high pressure, for example, can work normally in severe environments such as 15Mpa pressure.
The principle of detecting an eddy current sensor is described below, in which the sensor coil with a rectangular cross section is adopted, when the eddy current sensor moves along the axis of the sensor coil in the metal tube to be detected, the signal processing circuit assembly 40 excites the sensor coil to generate alternating current so as to generate alternating magnetic field to act on the wall of the metal tube to be detected, eddy current is generated on the surface of the wall of the tube, and at the same time, the eddy current generates an alternating magnetic field with a direction opposite to that of the sensor coil, and due to the reaction, the amplitude and phase of the high-frequency current of the sensor coil are changed, namely, the equivalent impedance of the sensor coil is changed, and the signal processing circuit assembly 40 converts the equivalent impedance change into voltage change to form a detection signal.
The detection signal voltage V, which corresponds to the detected distance x with equation 1:
V＝k×e -0.04x +b, wherein 0.5.ltoreq.k.ltoreq.1, -3.ltoreq.b.ltoreq.1, k, b being a real number.
Wherein x is more than or equal to 0 and less than or equal to 150mm.
Fig. 2 is a diagram showing a correspondence between a detection signal and a detection distance, wherein an abscissa indicates a detection distance x and an ordinate indicates a voltage value. The solid curve is a curve corresponding to formula 1, as shown in fig. 2, the slope of the curve corresponding to formula 1 is negative, and as x increases gradually, the absolute value of the slope becomes smaller gradually, and the detected distance x can be determined according to the value of the detection signal voltage V. The resolution of the detection signal voltage V can be expressed by the absolute value of a slope, and the larger the absolute value of the slope is, the higher the resolution is; on the contrary, as can be seen from fig. 2, the resolution of the detected signal voltage V decreases with increasing detected distance x, and the accuracy of calculating the detected distance x from the acquired detected signal voltage V is not high.
To overcome this problem, the portion of the solid curve where the absolute value of the slope is smaller than the threshold R is multiplied by R, where R corresponds to x at point R, for example t=60 mm, at point R on the curve corresponding to formula 1 in fig. 2. At this time, the multiplied voltage V' of the detection signal voltage V and the detected distance x satisfy equation 2:
V′＝k′×e -0.04x +b, where k '=nk, 3.ltoreq.n.ltoreq.10, t.ltoreq.x.ltoreq.150 mm, and k' N is a real number.
In fig. 2, the dashed curve represents the curve corresponding to equation 2, and for the portion where the absolute value of the slope of the curve corresponding to equation 1 is smaller than the threshold r, the resolution of the multiplied voltage V' of the detected signal voltage V is significantly improved due to the multiplication (N-fold amplification) method, and the accuracy of the detected distance x obtained therefrom is also improved accordingly.
Another embodiment of the present invention provides a method for manufacturing an eddy current sensor, and fig. 3 shows a flowchart of a method for manufacturing an eddy current sensor according to another embodiment of the present invention, and as shown in fig. 3, the method includes:
s100, arranging a groove at the bottom of a sensor base;
the sensor base 10 is a columnar structure and is made of a nonmetallic insulating material, such as a resin material like polyurethane, and the structure with the bottom groove 11 can be directly and integrally formed in a casting mode, or the groove 11 can be formed at the bottom of the columnar structure by adopting a machining or etching process.
S200, arranging a sensor coil on the top surface of a sensor base, and packaging the sensor coil on the top surface of the sensor base by adopting a packaging cover;
the sensor coil 20 may be wound with copper wire, and its cross-section in the plane of the winding may be circular or rectangular or other shape, preferably rectangular in this embodiment, with an aspect ratio preferably in the range of 1.5-5/3. The package cover 30 may be made of the same material as the sensor base 10, and may be bonded to the top surface of the sensor base 10 by welding or bonding.
The cross section of the sensor base 10 in the winding plane of the sensor coil 20 has the same or similar shape as the cross section of the sensor 20, for example, each has a rectangular shape, and the length and width of the cross section of the sensor base 10 in the winding plane of the sensor coil 20 may be substantially equal to or slightly larger than the length and width of the cross section of the sensor coil 20 in the winding plane thereof, respectively.
S300, the signal processing circuit component is accommodated and sealed in the groove.
The method specifically comprises the following steps:
s301: the signal processing circuit component is accommodated in the groove;
s302: preparing high-pressure-resistant sealing glue by adopting a two-component room-temperature curing epoxy glue in a ratio of 5:1;
s303: filling and sealing the prepared high-pressure-resistant sealing adhesive into the groove while stirring, so as to avoid air bubbles and completely cover the signal processing circuit component;
s304: the encapsulated sensor base is cured for more than 20 hours, e.g., 24 hours, at room temperature with the bottom surface facing upward.
It should be noted that the shapes and dimensions of the various components in the drawings do not reflect the actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention.
The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are merely directions with reference to the drawings, and are not intended to limit the scope of the present invention. In addition, the above embodiments may be mixed with each other or other embodiments based on design and reliability, i.e. the technical features of the different embodiments may be freely combined to form more embodiments.
It should be noted that, in the drawings or the text of the specification, implementations not shown or described are all forms known to those of ordinary skill in the art, and not described in detail. Furthermore, the above definitions of the elements and methods are not limited to the specific structures, shapes or modes mentioned in the embodiments, and may be simply modified or replaced by those of ordinary skill in the art.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the invention thereto, but to limit the invention thereto, and any modifications, equivalents, improvements and equivalents thereof may be made without departing from the spirit and principles of the invention.
Claims (6)
1. An eddy current sensor, comprising:
a sensor base, the bottom of which is provided with a groove;
the sensor coil is arranged on the top surface of the sensor base and is used for sending out induction signals and receiving detection signals; the packaging cover is arranged on the sensor coil in a covering mode and packages the sensor coil on the top surface of the sensor base; and
the signal processing circuit component is accommodated and sealed in the groove, receives detection signals obtained by the sensor coil, performs signal processing,
the section of the sensor coil in a winding plane is a first rectangle, and the length-width ratio of the first rectangle is 1.5-5/3;
wherein, the detection signal is a voltage V, and a distance x between the voltage V and the detected voltage V corresponds to formula 1:
V＝k×e -0.04x +b, wherein k, x and b are real numbers, k is more than or equal to 0.5 and less than or equal to 1, b is more than or equal to-3 and less than or equal to-1, x is more than or equal to 0 and less than 60mm, the slope of the curve corresponding to formula 1 is negative, the absolute value of the slope gradually becomes smaller along with the gradual increase of x, and the detected distance x is determined according to the value of the detection signal voltage V;
wherein, the multiplied voltage V' of the detection signal voltage V and the detected distance x conform to formula 2:
V′＝k′×e -0.04x +b, where k ' and N are real numbers, and k ' =nk, 3.ltoreq.n.ltoreq.10, 60.ltoreq.x.ltoreq.150 mm, the detected distance x being determined from the value of the multiplication voltage V '.
2. The eddy current sensor according to claim 1, wherein the signal processing circuit assembly is sealed with a high pressure resistant sealant composed of a two-component room temperature curing epoxy.
3. The eddy current sensor according to claim 1, wherein the sensor base has a second rectangle in cross-section in the plane of the sensor coil windings, the second rectangle having a length and width substantially equal to the length and width of the first rectangle, respectively.
4. A method of making an eddy current sensor as claimed in any one of claims 1 to 3, comprising:
a groove is arranged at the bottom of the sensor base;
arranging a sensor coil on the top surface of a sensor base, and packaging the sensor coil on the top surface of the sensor base by adopting a packaging cover; and
the signal processing circuit component is accommodated and sealed in the groove,
the section of the sensor coil in the winding plane is a first rectangle.
5. The method of manufacturing of claim 4, wherein said housing and sealing the signal processing circuit assembly within the recess comprises:
the signal processing circuit component is accommodated in the groove;
preparing high-pressure-resistant sealing adhesive by adopting a two-component room-temperature curing epoxy adhesive;
filling and sealing the prepared high-pressure-resistant sealing adhesive into the groove while stirring, so as to avoid air bubbles and completely cover the signal processing circuit component; and
and (3) solidifying the encapsulated sensor base for more than 20 hours in a room temperature environment with the bottom surface of the encapsulated sensor base facing upwards.
6. The method of manufacturing of claim 4 or 5, wherein the sensor base has a second rectangle in cross-section in the plane of the sensor coil windings, the second rectangle having a length and width substantially equal to the length and width of the first rectangle, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711150916.5A CN107830797B (en) | 2017-11-18 | 2017-11-18 | Large-range eddy current sensor for pipeline deformation detection and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711150916.5A CN107830797B (en) | 2017-11-18 | 2017-11-18 | Large-range eddy current sensor for pipeline deformation detection and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107830797A CN107830797A (en) | 2018-03-23 |
| CN107830797B true CN107830797B (en) | 2023-10-27 |
Family
ID=61652814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711150916.5A Active CN107830797B (en) | 2017-11-18 | 2017-11-18 | Large-range eddy current sensor for pipeline deformation detection and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107830797B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553138A (en) * | 2003-12-19 | 2004-12-08 | 上海交通大学 | Long measuring range displacement sensor with waterproof function |
| CN201302455Y (en) * | 2008-11-25 | 2009-09-02 | 罗福恒 | Package structure of eddy current transducer |
| CN201589598U (en) * | 2010-02-03 | 2010-09-22 | 上海乐春重工机电设备有限公司 | Electric eddy sensor tamper-proof structure |
| CN102022971A (en) * | 2010-12-21 | 2011-04-20 | 清华大学 | Electric eddy sensor |
| CN203489834U (en) * | 2013-09-26 | 2014-03-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor |
| CN105823493A (en) * | 2016-03-11 | 2016-08-03 | 上海交通大学 | Sensitivity enhancement type eddy current transducer |
| CN205482783U (en) * | 2016-02-26 | 2016-08-17 | 江西飞尚科技有限公司 | Current vortex soil deformation measuring transducer |
| CN105891323A (en) * | 2014-11-21 | 2016-08-24 | 中机生产力促进中心 | Eddy probe array for detecting pipeline deformation |
| CN205537488U (en) * | 2016-02-01 | 2016-08-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor |
| CN106500580A (en) * | 2016-09-26 | 2017-03-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor and its probe and coil |
| CN206291843U (en) * | 2016-11-11 | 2017-06-30 | 珠海市运泰利自动化设备有限公司 | Parallel wire ring type current vortex sensor |
| CN207907818U (en) * | 2017-11-18 | 2018-09-25 | 中机生产力促进中心 | Wide range current vortex sensor for Deformation inspection |
-
2017
- 2017-11-18 CN CN201711150916.5A patent/CN107830797B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553138A (en) * | 2003-12-19 | 2004-12-08 | 上海交通大学 | Long measuring range displacement sensor with waterproof function |
| CN201302455Y (en) * | 2008-11-25 | 2009-09-02 | 罗福恒 | Package structure of eddy current transducer |
| CN201589598U (en) * | 2010-02-03 | 2010-09-22 | 上海乐春重工机电设备有限公司 | Electric eddy sensor tamper-proof structure |
| CN102022971A (en) * | 2010-12-21 | 2011-04-20 | 清华大学 | Electric eddy sensor |
| CN203489834U (en) * | 2013-09-26 | 2014-03-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor |
| CN105891323A (en) * | 2014-11-21 | 2016-08-24 | 中机生产力促进中心 | Eddy probe array for detecting pipeline deformation |
| CN205537488U (en) * | 2016-02-01 | 2016-08-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor |
| CN205482783U (en) * | 2016-02-26 | 2016-08-17 | 江西飞尚科技有限公司 | Current vortex soil deformation measuring transducer |
| CN105823493A (en) * | 2016-03-11 | 2016-08-03 | 上海交通大学 | Sensitivity enhancement type eddy current transducer |
| CN106500580A (en) * | 2016-09-26 | 2017-03-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Eddy current displacement sensor and its probe and coil |
| CN206291843U (en) * | 2016-11-11 | 2017-06-30 | 珠海市运泰利自动化设备有限公司 | Parallel wire ring type current vortex sensor |
| CN207907818U (en) * | 2017-11-18 | 2018-09-25 | 中机生产力促进中心 | Wide range current vortex sensor for Deformation inspection |
Non-Patent Citations (1)
| Title |
|---|
| 宋宇等.《传感器及自动检测技术》.北京理工大学出版社,2013,第78页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107830797A (en) | 2018-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102283432B1 (en) | Coreless current sensor for high current power module | |
| JP4861155B2 (en) | Current sensor and molding method thereof | |
| JPS6038182Y2 (en) | Electromagnetic flow meter unit | |
| US7124645B2 (en) | Magnetic-inductive measuring device for flowing substances and method for its production | |
| JP6321800B2 (en) | Current sensor | |
| US9581571B2 (en) | Acoustic sensor and acoustic sensor system | |
| JP6131588B2 (en) | Current sensor | |
| US8067877B2 (en) | Anti-EMI ultrasonic transducer | |
| EP3228975B1 (en) | Eddy current sensor | |
| JP2021524591A (en) | Current converter with integrated primary conductor | |
| CN107830797B (en) | Large-range eddy current sensor for pipeline deformation detection and manufacturing method thereof | |
| US20060022125A1 (en) | Displacement sensor | |
| KR102107267B1 (en) | Sensor for detecting the position of a generator element | |
| JP2015152363A (en) | current sensor | |
| JP6343142B2 (en) | Coil with electronic components | |
| JP2013242301A (en) | Current sensor | |
| JP2015049061A (en) | Current sensor | |
| JP2009281915A (en) | Temperature sensor integrated type pressure sensor device | |
| KR101709671B1 (en) | Pressure Sensor Using Eddy Current | |
| JP5086733B2 (en) | Magnetic detection probe and method of manufacturing magnetic detection probe | |
| US11061084B2 (en) | Coil actuated pressure sensor and deflectable substrate | |
| JP2018048956A (en) | Torque sensor and correction method therefor | |
| JP6731093B2 (en) | Current detector | |
| KR102072065B1 (en) | A coreless non-contact type current measuring system | |
| JP2014174042A (en) | Current sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |