CN110412065B - Nuclear magnetic resonance sensor for composite insulator aging detection - Google Patents
Nuclear magnetic resonance sensor for composite insulator aging detection Download PDFInfo
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- CN110412065B CN110412065B CN201910532198.0A CN201910532198A CN110412065B CN 110412065 B CN110412065 B CN 110412065B CN 201910532198 A CN201910532198 A CN 201910532198A CN 110412065 B CN110412065 B CN 110412065B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
Abstract
The nuclear magnetic resonance sensor for the aging detection of the composite insulator can collect and arrange nuclear magnetic signals of the whole insulator at one time, realize the whole measurement of different radius areas of a sample, and reduce the workload of the measurement, so that the aging degree of the whole insulator is evaluated, and the nuclear magnetic resonance sensor has certain significance for improving the measurement efficiency and reducing the omission of the nuclear magnetic resonance sensor.
Description
Technical Field
The invention relates to the technical field of nuclear magnetic resonance, in particular to a nuclear magnetic resonance sensor for aging detection of a composite insulator.
Background
In actual engineering, if a sensor needs to be placed in a sample for measurement, and at this time, if different positions of the sample need to be measured, the sensor needs to be rotated or moved for measurement, or a radio frequency coil needs to be re-matched for re-measurement, so that the reliability of measurement is reduced, the workload of actual measurement is increased, in order to integrally evaluate the aging degree of a whole insulator, realize the integral measurement of different radius regions of the sample, and reduce the workload of measurement, it is necessary to provide a variable-size annular nuclear magnetic resonance sensor which can be used for composite insulator aging detection.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a nuclear magnetic resonance sensor for detecting the aging of a composite insulator, which realizes the overall measurement of different radius areas of a sample.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a nuclear magnetic resonance sensor for composite insulator ageing testing, includes two bases that the structure is the same, two base mirror symmetry that the structure is the same, the base is the tourus structure, the base can open and shut, be provided with a plurality of slots on the base, slot evenly distributed forms a plurality of different radial annular slots on the different radiuses of base, the slot is used for pegging graft magnet unit, is provided with the recess between the slot of same radius, the recess is used for placing conductive spring, forms annular magnet through conductive spring swing joint between the magnet unit of same radius, correspond directly over the magnet unit and be provided with a radio frequency coil unit, form annular radio frequency coil through conductive spring swing joint between the radio frequency coil unit of same radius, the magnetic pole direction of magnet unit is the same, radio frequency coil unit produces the radio frequency magnetic field and detects the echo signal that is surveyed the sample and produces, the radio frequency magnetic field generated by the annular radio frequency coil is orthogonal to the static magnetic field generated by the annular magnet.
Furthermore, the base comprises two semi-circular ring bodies, and one ends of the two semi-circular ring bodies are hinged with each other.
Further, a support structure for supporting the base is also included.
Further, bearing structure includes the bracing piece, the bracing piece is from last down to set gradually first horizontal pole, second horizontal pole, first horizontal pole is used for supporting the base that is located the top, the second horizontal pole is used for supporting the base that is located the below.
Further, the first cross bar and the second cross bar can move relatively along the vertical direction.
Furthermore, a spiral distance adjuster is arranged on the supporting rod.
Further, the radio frequency coil unit is spiral-shaped.
Further, the radio frequency coil unit is in a rectangular spiral shape.
Further, the base is provided with matching circuits corresponding to structures with different radiuses and is provided with a switch adjustable selection circuit.
The nuclear magnetic resonance sensor for the aging detection of the composite insulator can collect and arrange nuclear magnetic signals of the whole insulator at one time, realize the whole measurement of different radius areas of a sample, and reduce the workload of the measurement, so that the aging degree of the whole insulator is evaluated, and the nuclear magnetic resonance sensor has certain significance for improving the measurement efficiency and reducing the omission of the nuclear magnetic resonance sensor.
According to the nuclear magnetic resonance sensor for the aging detection of the composite insulator, the annular magnet can be placed into the slots with different radiuses in the using process, the purpose of changing the radius of the annular magnet is achieved, the overall measurement of the area with different radiuses of the sample is realized, the problem that the traditional nuclear magnetic resonance instrument cannot measure different positions of the sample, or the measurement can be carried out only after the sensor and the sensor are rotated or moved or the radio frequency coil is re-matched is solved, the measurement reliability is greatly improved, the workload of actual measurement is reduced, and the nuclear magnetic resonance sensor is high in practicability.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a schematic structural view of the base of the present invention.
Fig. 4 is a schematic structural view of the ring magnet and the ring rf coil of the present invention in a non-closed state.
Detailed Description
The following examples may help one skilled in the art to more fully understand the present invention, but are not intended to limit the invention in any way.
Examples
Referring to fig. 1, a nuclear magnetic resonance sensor for composite insulator aging detection includes two bases 1 with the same structure, the two bases 1 are mirror symmetry, the base 1 is a torus structure, the base 1 can be opened and closed, the base 1 is composed of two semicircular toroids 11, one ends of the two semicircular toroids 11 are hinged to each other, the base 1 is provided with a plurality of slots 12, the slots 12 are uniformly distributed on different radiuses of the base to form a plurality of annular slots 12 with different radiuses, the slots 12 are used for inserting magnet units 13, a groove 14 is arranged between the slots 12 with the same radius, the groove 14 is used for placing a conductive spring, the magnet units 13 with the same radius are movably connected through the conductive spring to form an annular magnet, two sides of the magnet units 13 are provided with hanging rings, two ends of the conductive spring are provided with hooks, the conductive spring is movably connected to the hanging ring through a hook, a radio frequency coil unit 15 is correspondingly arranged right above the magnet unit 13, the radio frequency coil units 15 with the same radius are movably connected through the conductive spring to form an annular radio frequency coil, the magnetic pole directions of the magnet units 13 are the same, the radio frequency coil units 15 generate a radio frequency magnetic field and detect echo signals generated by a detected sample, and the radio frequency magnetic field generated by the annular radio frequency coil is orthogonal to a static magnetic field generated by the annular magnet; the device also comprises a supporting structure 2 for supporting the base 1, wherein the supporting structure 2 comprises a supporting rod 21, the supporting rod 21 is sequentially provided with a first cross rod 22 and a second cross rod 23 from top to bottom, the first cross rod 22 is used for supporting the base 1 positioned above, the second cross rod 23 is used for supporting the base 1 positioned below, the first cross rod 22 and the second cross rod 23 can move relatively along the vertical direction, the supporting rod 21 is provided with a spiral distance adjuster 24, the radio frequency coil unit 15 is in a rectangular spiral shape, and the base 1 is provided with matching circuits corresponding to structures with different radiuses and a switch-adjustable selection circuit.
The nuclear magnetic resonance sensor for the aging detection of the composite insulator can collect and arrange nuclear magnetic signals of the whole insulator at one time, realize the whole measurement of different radius areas of a sample, and reduce the workload of the measurement, so that the aging degree of the whole insulator is evaluated, and the nuclear magnetic resonance sensor has certain significance for improving the measurement efficiency of the nuclear magnetic resonance sensor and reducing the omission; when the device is used, the annular magnet can be placed into the slots 12 with different radiuses, the purpose of changing the radiuses of the annular magnet is achieved, the overall measurement of the areas with different radiuses of the sample is achieved, the problem that the traditional nuclear magnetic resonance instrument cannot measure different positions of the sample, or the measurement can be carried out only after the traditional nuclear magnetic resonance instrument needs to rotate a sensor and a mobile sensor or re-match a radio frequency coil is solved, the measurement reliability is greatly improved, the workload of actual measurement is reduced, and the practicability is high.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. The utility model provides a nuclear magnetic resonance sensor for composite insulator ageing testing, its characterized in that includes two bases that the structure is the same, two base mirror symmetry that the structure is the same, the base is the torus structure, the base can open and shut, be provided with a plurality of slots on the base, slot evenly distributed is on the different radiuses of base, forms a plurality of different radial annular slots, the slot is used for pegging graft magnet unit, is provided with the recess between the slot of same radius, the recess is used for placing conductive spring, forms annular magnet through conductive spring swing joint between the magnet unit of same radius, correspond directly over the magnet unit and be provided with a radio frequency coil unit, form annular radio frequency coil through conductive spring swing joint between the radio frequency coil unit of same radius, the magnetic pole direction of magnet unit is the same, the radio frequency coil unit generates a radio frequency magnetic field and detects an echo signal generated by the tested sample, and the radio frequency magnetic field generated by the annular radio frequency coil is orthogonal to the static magnetic field generated by the annular magnet.
2. The NMR sensor for composite insulator degradation detection according to claim 1, wherein the base is formed of two semicircular rings, and one ends of the two semicircular rings are hinged to each other.
3. The NMR sensor for composite insulator degradation detection of claim 1, further comprising a support structure for supporting the base.
4. The NMR sensor for composite insulator aging detection according to claim 3, wherein the support structure comprises a support rod, the support rod is provided with a first cross rod and a second cross rod from top to bottom in sequence, the first cross rod is used for supporting the base located above, and the second cross rod is used for supporting the base located below.
5. The NMR sensor for composite insulator degradation detection of claim 4, wherein the first and second rails are capable of relative vertical movement.
6. The NMR sensor for composite insulator aging detection according to claim 5, wherein the support rod is provided with a screw distance adjuster.
7. The NMR sensor for composite insulator degradation detection according to claim 1, wherein the RF coil unit has a spiral shape.
8. The NMR sensor for composite insulator degradation detection according to claim 7, wherein the RF coil unit has a rectangular spiral shape.
9. The NMR sensor for composite insulator aging detection according to claim 1, wherein the base has matching circuits corresponding to different radius structures, and has a switch adjustable selection circuit.
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| CN111929340A (en) * | 2020-06-23 | 2020-11-13 | 贵州电网有限责任公司 | Composite insulating material NMR formula nondestructive test device convenient to use |
| CN111855710A (en) * | 2020-07-31 | 2020-10-30 | 洛阳欣隆工程检测有限公司 | DR real-time detection system for field large-diameter pipeline weld joint |
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2019
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| EP1486793A2 (en) * | 2003-06-10 | 2004-12-15 | Hitachi, Ltd. | Superconducting magnetic resonance r.f. probe coil |
| WO2006097888A1 (en) * | 2005-03-16 | 2006-09-21 | Koninklijke Philips Electronics, N.V. | Optical decoupling, tuning and shimming of magnetic resonance coils |
| CN104297281A (en) * | 2014-10-24 | 2015-01-21 | 广东电网有限责任公司东莞供电局 | Circular-arc unilateral nuclear magnetic resonance sensor |
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