CN108759653B - Wind generating set load strain monitoring device based on eddy current sensor - Google Patents
Wind generating set load strain monitoring device based on eddy current sensor Download PDFInfo
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- CN108759653B CN108759653B CN201810828314.9A CN201810828314A CN108759653B CN 108759653 B CN108759653 B CN 108759653B CN 201810828314 A CN201810828314 A CN 201810828314A CN 108759653 B CN108759653 B CN 108759653B
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- eddy current
- current sensor
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- vortex sensor
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 11
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 34
- 238000009434 installation Methods 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract 1
- 230000007774 longterm Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012549 training Methods 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a load strain monitoring device of a wind generating set based on an eddy current sensor, which comprises an L-shaped electromagnetic induction base, an eddy current sensor mounting sliding seat, an eddy current sensor adjusting sliding rail and an eddy current sensor, wherein the L-shaped electromagnetic induction base is provided with a plurality of electric power units; the L-shaped electromagnetic induction base and the eddy current sensor adjusting slide rail are fixed on the surface of the test member, the eddy current sensor mounting slide seat is slidably mounted on the eddy current sensor adjusting slide rail, and the eddy current sensor mounting slide seat and the eddy current sensor adjusting slide rail are tightly combined and fixed by fastening through a fixing bolt passing through a sliding groove on the eddy current sensor mounting slide seat and a through hole on the eddy current sensor adjusting slide rail; the electric vortex sensor is arranged on the electric vortex sensor mounting sliding seat in a threaded manner and is connected to a collection system of the wind generating set. The invention has the advantages of moderate price, low installation technical requirement, convenient disassembly and assembly, high test precision, convenient integration of test signals, long service life and the like.
Description
Technical Field
The invention relates to the technical field of strain monitoring of wind generating sets, in particular to a load strain monitoring device of a wind generating set based on an eddy current sensor.
Background
With the development of large-scale and intelligent wind generating sets, owners and manufacturers are paying more attention to the stability and reliability of the wind generating sets, particularly the offshore wind power is developed and applied in recent years, and the problem of prominent offshore wind power operation and maintenance is that the offshore wind power is difficult to operate and maintain, high in cost, bad in environment and the like, so that a monitoring system suitable for a long term and independent of a main control system is put into development in China, and the health state of a fan is monitored in an omnibearing way, wherein the load strain monitoring system is an important monitoring means related to the safety and service life of the whole fan. The method can accurately measure local stress strain or high stress concentration points according to a strain gauge test mode, has high test accuracy, but has high installation technical requirements, drift in long-term operation, limited service life and difficult later replacement and maintenance, so the strain test is mostly used for short-term high-precision experimental test; another optical fiber load sensor developed in recent years is gradually applied, overcomes the defects of a strain gauge, has the advantages of long service life and the like, but has special equipment, needs a special optical demodulator, is inconvenient to integrate with other systems, has high price of the whole system, and in addition, most of demodulators have attenuation after long-time operation, so that the deviation of a measuring result is caused, and the use of the optical fiber load sensor in engineering is limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a wind generating set load strain monitoring device based on an eddy current sensor, which adopts a high-precision eddy current sensor and combines corresponding equipment tools to realize a strain monitoring device with good engineering application. The device is applied to engineering projects, and after a corresponding analysis algorithm is established through analysis of data, the device can be widely applied to large intelligent offshore wind turbines to continuously and accurately monitor the health condition of the turbines.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: a load strain monitoring device of a wind generating set based on an eddy current sensor comprises an L-shaped electromagnetic induction base, an eddy current sensor mounting sliding seat, an eddy current sensor adjusting sliding rail and an eddy current sensor; the L-shaped electromagnetic induction base and the eddy current sensor adjusting slide rail are fixed on the surface of the test component, the vertical surface of the L-shaped electromagnetic induction base faces the eddy current sensor adjusting slide rail, in order to ensure the uniformity and the perpendicularity of the installation distance, an L-shaped ruler is required to be placed between the L-shaped electromagnetic induction base and the eddy current sensor adjusting slide rail during fixing, and fixing operation is required to be performed after the vertical surface of the L-shaped ruler is tightly attached to the vertical surface of the L-shaped electromagnetic induction base and the horizontal edge end surface of the L-shaped ruler is tightly attached to one end surface of the eddy current sensor adjusting slide rail; the electric vortex sensor installation sliding seat consists of a vertical plate and two strip-shaped plates which are fixed at the bottom of the vertical plate and extend outwards horizontally, a threaded hole is formed in the middle of the upper part of the vertical plate, the electric vortex sensor is installed on the vertical plate in a threaded mode, corresponding sliding grooves are formed in the two strip-shaped plates, through holes corresponding to the sliding grooves are formed in the linear guide plates of the electric vortex sensor adjustment sliding rail, the electric vortex sensor installation sliding seat is slidably installed on the electric vortex sensor adjustment sliding rail, after the electric vortex sensor installation sliding seat is installed, the linear guide plates of the electric vortex sensor adjustment sliding rail are located between the two strip-shaped plates of the electric vortex sensor installation sliding seat, and the electric vortex sensor installation sliding seat and the electric vortex sensor adjustment sliding rail can be tightly combined and fixed through the sliding grooves on the two strip-shaped plates and the through holes in the linear guide plates by using fixing bolts; the electric vortex sensor passes through a threaded hole on an electric vortex sensor installation sliding seat in a threaded fit mode to be installed on the electric vortex sensor installation sliding seat, and in order to ensure the uniformity of the monitoring distance, the L-shaped gauge is placed between the L-shaped electromagnetic induction base and the electric vortex sensor adjusting sliding rail to be tightly attached, the electric vortex sensor is adjusted to enable the end face of the electric vortex sensor to be attached to the L-shaped gauge, and the thickness of the L-shaped gauge is used for ensuring the consistency of the installation distance; the electric vortex sensor inserts wind generating set's acquisition system, evaluate initial distance through the electromagnetic induction volume between monitoring electric vortex sensor's terminal surface and the L shape electromagnetic induction base, when the test component surface takes place to warp, then can drive the distance between electromagnetic induction base and the electric vortex sensor regulation slide rail and change, because electric vortex sensor and electric vortex sensor installation slide are all fixed on electric vortex sensor regulation slide rail, consequently, the change of surface strain on the test component just can drive the change of distance between electromagnetic induction base and the electric vortex sensor terminal surface to test the change of part strain.
The L-shaped electromagnetic induction base and the eddy current sensor adjusting slide rail are fixed on the surface of the test member in a glue fixing or welding mode.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the test precision is high, each sensor is calibrated before delivery, and the test result is ensured not to deviate due to the differences of the installation process and personnel technology.
2. The installation technology requirement is low, and the on-site engineer can complete the installation of the equipment after short-term training.
3. The tool distance is adjustable, so that deviation caused in the installation process can be effectively reduced, and the installation uniformity can be ensured under the condition of forming standard installation standards.
4. The device is convenient to install and maintain, long in service life and suitable for long-term stable monitoring.
5. The device is not affected by temperature, has high corrosion resistance, and can ensure the consistency of the test in the environment of the sensor application range.
Drawings
Fig. 1 is a front view of the device of the present invention.
Fig. 2 is a top view of the device of the present invention.
Fig. 3 is a structural view of the L-shaped ruler.
FIG. 4 is a schematic view of the structure of the device of the present invention after the L-shaped ruler is placed.
FIG. 5 is a schematic view of an eddy current sensor mounting carriage.
FIG. 6 is a second schematic view of the structure of the eddy current sensor mounting carriage.
FIG. 7 is a third schematic view of the structure of the eddy current sensor mounting carriage.
Fig. 8 is a schematic structural view of an adjustment slide rail of the eddy current sensor.
FIG. 9 is a second schematic view of the structure of the current vortex sensor adjusting rail.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Referring to fig. 1 to 9, the load strain monitoring device of a wind generating set based on an eddy current sensor provided by the embodiment comprises an L-shaped electromagnetic induction base 1, an eddy current sensor mounting sliding seat 2, an eddy current sensor adjusting sliding rail 3 and an eddy current sensor 5; since the whole device tests the structural strain by monitoring the distance and change of the eddy current relative to the sensing plane, the monitoring device ensures the perpendicularity and distance of the eddy current sensor 5 relative to the sensing plane. The L-shaped electromagnetic induction base 1 and the eddy current sensor adjusting slide rail 3 are fixed on the surface of the test member 6 in a glue fixing or welding mode, the vertical surface of the L-shaped electromagnetic induction base 1 faces the eddy current sensor adjusting slide rail 3, and in order to ensure the uniformity and the perpendicularity of the installation distance, as shown in fig. 4, an L-shaped ruler 7 is required to be placed between the L-shaped electromagnetic induction base 1 and the eddy current sensor adjusting slide rail 3 during fixing, and fixing operation is required after the vertical surface of the L-shaped ruler 7 is tightly attached to the vertical surface of the L-shaped electromagnetic induction base 1 and the horizontal edge end surface of the L-shaped ruler 7 is tightly attached to one end surface of the eddy current sensor adjusting slide rail 3; the eddy current sensor mounting sliding seat 2 consists of a vertical plate 21 and two parallel strip-shaped plates 22 which are fixed at the bottom of the vertical plate 21 and extend outwards horizontally, a threaded hole 23 is formed in the middle of the upper part of the vertical plate 21 and is used for mounting the eddy current sensor 5 on the vertical plate 21 in a threaded manner, corresponding sliding grooves 24 are formed in the two strip-shaped plates 22, through holes 32 corresponding to the sliding grooves 24 are formed in a linear guide plate 31 of the eddy current sensor adjusting sliding rail 3, the eddy current sensor mounting sliding seat 2 is slidably mounted on the eddy current sensor adjusting sliding rail 3, a linear guide plate 31 of the eddy current sensor adjusting sliding rail 3 is positioned between the two strip-shaped plates 22 of the eddy current sensor mounting sliding seat 2 after mounting, the eddy current sensor mounting sliding seat 2 and the eddy current sensor adjusting sliding rail 3 are tightly combined and fixed by using fixing bolts 4 through the sliding grooves 24 on the two strip-shaped plates 22 and the through holes 32 on the linear guide plate 31, and anti-slip nuts or threads can be used for anti-slip treatment when necessary; the eddy current sensor 5 is installed on the eddy current sensor installation slide seat 2 by penetrating through a threaded hole 23 on the eddy current sensor installation slide seat 2 in a threaded fit mode, in order to ensure uniformity of monitoring distance, as shown in fig. 4, the L-shaped gauge 7 is placed between the L-shaped electromagnetic induction base 1 and the eddy current sensor adjustment slide rail 3 to keep close fit, and after the eddy current sensor 5 is adjusted, the end face of the eddy current sensor 5 is attached to the L-shaped gauge 7, and the thickness of the L-shaped gauge 7 is used for ensuring consistency of the installation distance; the eddy current sensor 5 is connected into a collection system of the wind generating set, an initial distance is estimated by monitoring electromagnetic induction quantity between the end face of the eddy current sensor 5 and the L-shaped electromagnetic induction base 1, when the surface of the test component 6 is deformed, the electromagnetic induction base 1 and the eddy current sensor adjusting sliding rail 3 are driven to change in distance, and the eddy current sensor 5 and the eddy current sensor mounting sliding seat 2 are fixed on the eddy current sensor adjusting sliding rail 3, so that the surface strain change on the test component 6 can drive the distance change between the electromagnetic induction base 1 and the end face of the eddy current sensor 5, and the change of the strain of a test component is tested.
The L-shaped gauge 7 can be specially processed according to the test requirement, and is required to have high-precision verticality, and the thickness and the length of the gauge keep one specification as much as possible in one project, so that all installation results are unified.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so variations in shape and principles of the present invention should be covered.
Claims (2)
1. Wind generating set load strain monitoring device based on current vortex sensor, its characterized in that: the device comprises an L-shaped electromagnetic induction base, an electric vortex sensor mounting sliding seat and an electric vortex sensor adjusting sliding rail, and an electric vortex sensor; the L-shaped electromagnetic induction base and the eddy current sensor adjusting slide rail are fixed on the surface of the test component, the vertical surface of the L-shaped electromagnetic induction base faces the eddy current sensor adjusting slide rail, in order to ensure the uniformity and the perpendicularity of the installation distance, an L-shaped ruler is required to be placed between the L-shaped electromagnetic induction base and the eddy current sensor adjusting slide rail during fixing, and fixing operation is required to be performed after the vertical surface of the L-shaped ruler is tightly attached to the vertical surface of the L-shaped electromagnetic induction base and the horizontal edge end surface of the L-shaped ruler is tightly attached to one end surface of the eddy current sensor adjusting slide rail; the electric vortex sensor installation sliding seat consists of a vertical plate and two strip-shaped plates which are fixed at the bottom of the vertical plate and extend outwards horizontally, a threaded hole is formed in the middle of the upper part of the vertical plate, the electric vortex sensor is installed on the vertical plate in a threaded mode, corresponding sliding grooves are formed in the two strip-shaped plates, through holes corresponding to the sliding grooves are formed in the linear guide plates of the electric vortex sensor adjustment sliding rail, the electric vortex sensor installation sliding seat is slidably installed on the electric vortex sensor adjustment sliding rail, after the electric vortex sensor installation sliding seat is installed, the linear guide plates of the electric vortex sensor adjustment sliding rail are located between the two strip-shaped plates of the electric vortex sensor installation sliding seat, and the electric vortex sensor installation sliding seat and the electric vortex sensor adjustment sliding rail can be tightly combined and fixed through the sliding grooves on the two strip-shaped plates and the through holes in the linear guide plates by using fixing bolts; the electric vortex sensor passes through a threaded hole on an electric vortex sensor installation sliding seat in a threaded fit mode to be installed on the electric vortex sensor installation sliding seat, and in order to ensure the uniformity of the monitoring distance, the L-shaped gauge is placed between the L-shaped electromagnetic induction base and the electric vortex sensor adjusting sliding rail to be tightly attached, the electric vortex sensor is adjusted to enable the end face of the electric vortex sensor to be attached to the L-shaped gauge, and the thickness of the L-shaped gauge is used for ensuring the consistency of the installation distance; the electric vortex sensor is connected into a collection system of the wind generating set, the initial distance is estimated by monitoring electromagnetic induction quantity between the end face of the electric vortex sensor and the L-shaped electromagnetic induction base, when the surface of the test component is deformed, the surface strain change of the test component can drive the electromagnetic induction base and the electric vortex sensor to adjust the distance between the slide rails to change, and therefore the change of the strain of the test component can be detected.
2. The wind generating set load strain monitoring device based on an eddy current sensor as recited in claim 1, wherein: the L-shaped electromagnetic induction base and the eddy current sensor adjusting slide rail are fixed on the surface of the test member in a glue fixing or welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828314.9A CN108759653B (en) | 2018-07-25 | 2018-07-25 | Wind generating set load strain monitoring device based on eddy current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828314.9A CN108759653B (en) | 2018-07-25 | 2018-07-25 | Wind generating set load strain monitoring device based on eddy current sensor |
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| Publication Number | Publication Date |
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| CN108759653A CN108759653A (en) | 2018-11-06 |
| CN108759653B true CN108759653B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810828314.9A Active CN108759653B (en) | 2018-07-25 | 2018-07-25 | Wind generating set load strain monitoring device based on eddy current sensor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594184A (en) * | 2019-10-14 | 2019-12-20 | 中铁第四勘察设计院集团有限公司 | Safety monitoring device and method for tunnel hoisting fan |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08145815A (en) * | 1994-11-24 | 1996-06-07 | Nippon Steel Corp | Stress sensor |
| CN208567778U (en) * | 2018-07-25 | 2019-03-01 | 明阳智慧能源集团股份公司 | A kind of wind power generating set load strain monitoring device based on current vortex sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7526964B2 (en) * | 2002-01-25 | 2009-05-05 | Jentek Sensors, Inc. | Applied and residual stress measurements using magnetic field sensors |
| US6960911B2 (en) * | 2002-01-29 | 2005-11-01 | Kabushiki Kaisha Toshiba | Strain sensor |
| CN107614954B (en) * | 2015-03-06 | 2020-10-27 | 世伟洛克公司 | System and method for strain detection in a coupling |
-
2018
- 2018-07-25 CN CN201810828314.9A patent/CN108759653B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08145815A (en) * | 1994-11-24 | 1996-06-07 | Nippon Steel Corp | Stress sensor |
| CN208567778U (en) * | 2018-07-25 | 2019-03-01 | 明阳智慧能源集团股份公司 | A kind of wind power generating set load strain monitoring device based on current vortex sensor |
Non-Patent Citations (1)
| Title |
|---|
| 电涡流式压力传感器的研究;胡嗣云;仪表技术与传感器(第05期) * |
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