CN114136223B - Optical fiber detection device for automatically measuring air gap of large motor - Google Patents
Optical fiber detection device for automatically measuring air gap of large motor Download PDFInfo
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- CN114136223B CN114136223B CN202111297921.5A CN202111297921A CN114136223B CN 114136223 B CN114136223 B CN 114136223B CN 202111297921 A CN202111297921 A CN 202111297921A CN 114136223 B CN114136223 B CN 114136223B
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- optical fiber
- motor
- fiber probe
- air gap
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses an optical fiber detection device for automatically measuring air gaps of a large motor, which comprises an optical fiber probe, a propelling device, a moving device, a main control device and a track, wherein the optical fiber probe is arranged on the propelling device, the moving device is arranged on the propelling device and can drive the propelling device to move on the track, the propelling device comprises a lifting bracket, a first motor is arranged on the lifting bracket, a lifting platform is connected on the lifting bracket in a sliding way, the output end of the first motor is connected with the lifting platform, the optical fiber probe is vertically arranged on the lifting platform, and the main control device is respectively connected with the optical fiber probe, the propelling device and the moving device through signals. The production cost is reduced.
Description
Technical Field
The invention relates to the technical field of optical fiber detection, in particular to an optical fiber detection device for automatically measuring an air gap of a large motor.
Background
The fiber probe is the foremost part of the fiber sensor that receives signals, and the fiber has many excellent properties, such as: water resistance, high temperature resistance and chemical corrosion resistance; electromagnetic interference and nuclear radiation resistance, electrical insulation; small size, flexibility, light weight, and can be used in places where people cannot reach (such as high temperature region), or in areas harmful to people (such as nuclear radiation region). The optical fiber-based sensor has many characteristics, such as high sensitivity, high transmission speed, large information capacity, wide applicability, and the like.
For a magnetic levitation motor, the air gap between the primary electromagnet and the secondary electromagnet is one of the most critical factors for ensuring the normal operation of the magnetic levitation motor. The air gap distribution can be uneven in links of manufacturing, mounting, running and the like, when the air gap distribution is more than 10%, the magnetic suspension motor is considered to have air gap faults, the faults can generate unbalanced magnetic pulling force on the primary electromagnet, and therefore the detection of the air gap has important significance on the motor. The traditional air gap dynamic measurement method utilizes the principles of capacitance, inductance and eddy current to measure, but the methods are not suitable for accurate measurement in a strong electromagnetic field environment. The optical fiber sensor measures displacement by using the principle that the intensity of received light changes due to the change of the distance between a measured surface and the surface of the sensor, so that the optical fiber sensor has the advantage of anti-electromagnetic interference.
The existing optical fiber sensor probe is limited in the process of extending into a large-scale motor secondary electromagnet for detection, the length of a gap exceeds the range of the optical fiber sensor sometimes, the phenomenon of scattering and the like easily occurs after the light emitted by the optical fiber sensor exceeds the range, so that the measurement is not accurate enough, multiple points of the motor need to be measured during measurement, and each point needs to be detected by installing one optical fiber sensor probe, so the measurement cost is improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an optical fiber detection device for automatically measuring the air gap of a large motor, and aims to solve the problems in the prior art.
In order to solve the technical problem, the invention is solved by the following technical scheme:
the utility model provides an optical fiber detection device for automatic measure big motor air gap, includes fiber probe, advancing device, mobile device, main control unit and track, fiber probe sets up on advancing device, mobile device installs on advancing device, mobile device can drive advancing device and move on the track, advancing device includes lifting support, the last first motor that is equipped with of lifting support, the last landing platform that has connect of lifting support, the output of first motor is connected with the landing platform, the vertical setting of fiber probe is on the landing platform, main control unit respectively with fiber probe, advancing device and mobile device signal connection.
Preferably, the optical fiber probe comprises a transmitting optical fiber and at least two groups of receiving optical fibers arranged from inside to outside, the receiving optical fibers comprise a plurality of multimode optical fibers, and the multimode optical fibers are arranged on the outer side of the transmitting optical fiber in a surrounding manner.
Preferably, the lifting platform is connected to the lifting support in a sliding manner through a screw rod, and the output end of the first motor is connected with the screw rod.
Preferably, the first motor is a stepping motor.
Preferably, the first motor is a linear motor.
Preferably, the moving device comprises a rotating shaft, one end of the rotating shaft is rotatably connected to the lower portion of the lifting support, a gear is fixed on the rotating shaft, and the other end of the rotating shaft is connected with the second motor.
Preferably, the track comprises a track support, the track support is annular, a rack is connected to the inner wall of the track support, the rack can be in gear joint with a gear, and an annular hole for the rotating shaft to penetrate through is formed in the track support.
Preferably, a motor sliding groove is formed in the outer side of the track support, and the second motor is connected in the motor sliding groove in a sliding mode.
The invention has the advantages that:
the invention improves the measuring range of the optical fiber probe by arranging the propelling device, if the measuring range of the optical fiber probe is not enough to measure an overlarge air gap, the propelling device can accurately push the optical fiber probe into the secondary magnet of the motor, the propelling distance of the propelling device can be calculated by the main control device, the propelling distance of the propelling device and the detecting distance of the optical fiber probe are the actual distance of the air gap, and the optical fiber probe can be driven to move to the lower part of each detection point by arranging the moving device, so that one optical fiber probe can detect a plurality of points, the production cost is reduced, the invention has reasonable design, meets the market demand and is suitable for popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be discussed below, it is obvious that the technical solutions described in conjunction with the drawings are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings can be obtained according to the embodiments shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the track structure of the present invention;
FIG. 3 is a schematic diagram of a fiber optic probe according to the present invention;
fig. 4 is a schematic diagram of the structure of the secondary magnet of the magnetic levitation motor of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without the need for inventive work, are within the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 4, an optical fiber detection device for automatically measuring air gap of a large motor comprises an optical fiber probe 1, a propelling device, a moving device, a main control device and a track 11, wherein the optical fiber probe 1 is arranged on the propelling device, the moving device can drive the propelling device to move on the track 11, the propelling device comprises a lifting support 2, a first motor 4 is arranged on the lifting support 2, a lifting platform 3 is connected on the lifting support 2, an output end of the first motor 4 is connected with the lifting platform 3, the optical fiber probe 1 is vertically arranged on the lifting platform 3, and the main control device is respectively connected with the optical fiber probe 1, the propelling device and the moving device through signals.
The optical fiber probe 1 comprises a transmitting optical fiber 9 and at least two groups of receiving optical fibers, the transmitting optical fiber 9 and the at least two groups of receiving optical fibers are arranged from inside to outside, the receiving optical fibers comprise a plurality of multimode optical fibers 10, the multimode optical fibers 10 are arranged on the outer side of the transmitting optical fiber 9 in a surrounding mode, the lifting platform 3 is connected to the lifting support 2 in a sliding mode through the screw rod 5, the output end of the first motor 4 is connected with the screw rod 5, the number of the receiving optical fibers is two or three or four, and the range capable of receiving light rays emitted by the transmitting optical fiber 9 when the number of the receiving optical fiber groups is large, so that the measuring distance is increased.
The mobile device comprises a rotating shaft 8, one end of the rotating shaft 8 is rotatably connected to the lower portion of the lifting support 2, a gear 7 is fixed on the rotating shaft 8, the other end of the rotating shaft 8 is connected with a second motor 6, the second motor 6 can drive the rotating shaft 8 to rotate, and the rotating shaft 8 can drive the gear 7 to rotate.
The track 11 support outside is equipped with motor spout 13, second motor 6 sliding connection is in motor spout 13, and second motor 6 can move along motor spout 13, and motor spout 13 can prevent that second motor 6 from rotatory.
The principle of the invention is that a plurality of detection points are arranged on a secondary magnet 15 of a magnetic suspension motor, the detection points are a plurality of detection holes 16 arranged on the secondary magnet 15, an optical fiber probe 1 can be inserted into the detection holes 16 to detect an air gap, the range of the optical fiber probe 1 is limited generally, when the air gap exceeds the range of the optical fiber probe 1, the phenomenon that the light cannot be normally reflected back or the measurement precision is greatly reduced can occur due to the limit of the range after being emitted out, therefore, in order to ensure the normal measurement, the optical fiber probe 1 needs to be pushed into a distance by a propelling device, the distance between the optical fiber probe 1 and a primary magnet is reduced, the distance between the optical fiber probe 1 and the primary magnet is in the detection range of the optical fiber probe 1, the distance pushed into by the propelling device and the distance measured by the optical fiber probe 1 are the actual distance of the air gap, and the propelling device is controlled by a main control device when being propelled, the main control device is an upper computer which can calculate the actual distance of the air gap, and when the propelling device is in use, the screw rod 5 is driven to rotate forwards or backwards by controlling the forward rotation or the reverse rotation of the first motor 4, the lifting platform 3 can be driven to ascend or descend by the forward rotation or the reverse rotation of the screw rod 5, thereby driving the optical fiber probe 1 to move up or down, the moving device can drive the propelling device and the optical fiber probe 1 to move to the position under the detection hole 16 along the track 11, when in operation, the second motor 6 rotates forward or backward to drive the rotating shaft 8 to rotate forward or backward, thereby driving the gear 7 to rotate forwards and backwards, the gear 7 is in toothed connection with the rack 12, the rack 12 is fixed, the gear 7 moves forwards along the direction of the rack 12, thereby drive advancing device and remove, but the accurate assigned position that moves of host computer controlling mobile device to solved a fiber probe 1 and can detected the problem of a plurality of points.
The second embodiment:
the difference between the second embodiment and the first embodiment is that the first motor 4 is a linear motor, and the linear motor can directly drive the lifting platform 3 to move up and down, so that the structure is simpler, and the installation is more convenient.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides an optical fiber detection device for automatic measure big motor air gap, its characterized in that, includes fiber probe (1), advancing device, mobile device, master control set and track (11), fiber probe (1) sets up on advancing device, mobile device installs on advancing device, mobile device can drive advancing device and move on track (11), advancing device includes lifting support (2), be equipped with first motor (4) on lifting support (2), it has elevating platform (3) to slip on lifting support (2), the output of first motor (4) is connected with elevating platform (3), fiber probe (1) is vertical to be set up on elevating platform (3), master control set respectively with fiber probe (1), advancing device and mobile device signal connection, one section distance is pushed into fiber probe (1) through advancing device, the distance between the optical fiber probe (1) and the primary magnet is reduced, the distance between the optical fiber probe (1) and the primary magnet is in the detection range of the optical fiber probe (1), and the distance pushed by the pushing device into the optical fiber probe (1) plus the distance measured by the optical fiber probe (1) is the actual distance of the air gap.
2. An optical fiber detection device for automatically measuring the air gap of a large motor according to claim 1, wherein the optical fiber probe (1) comprises a transmitting optical fiber (9) and at least two groups of receiving optical fibers, the transmitting optical fiber and the receiving optical fibers are arranged from inside to outside, the receiving optical fibers comprise a plurality of multimode optical fibers (10), and the multimode optical fibers (10) are arranged around the transmitting optical fiber (9).
3. The optical fiber detection device for automatically measuring the air gap of the large motor according to claim 1, wherein the lifting platform (3) is slidably connected to the lifting bracket (2) through a screw rod (5), and the output end of the first motor (4) is connected with the screw rod (5).
4. A fiber optic detection device for automatic measurement of large motor air gaps according to claim 3, characterized in that the first motor (4) is a stepper motor.
5. An optical fiber detection device for automatically measuring large motor air gaps according to claim 1, characterized in that the first motor (4) is a linear motor.
6. The optical fiber detection device for automatically measuring the air gap of the large motor according to claim 1, wherein the moving device comprises a rotating shaft (8), one end of the rotating shaft (8) is rotatably connected to the lower part of the lifting bracket (2), a gear (7) is fixed on the rotating shaft (8), and the other end of the rotating shaft (8) is connected with the second motor (6).
7. The optical fiber detection device for automatically measuring the air gap of the large motor according to claim 6, wherein the rail (11) comprises a rail (11) bracket, the rail (11) bracket is annular, a rack (12) is connected to the inner wall of the rail (11) bracket, the rack (12) can be in toothed connection with the gear (7), and an annular hole (14) for the rotating shaft (8) to pass through is formed in the rail (11) bracket.
8. An optical fiber detection device for automatically measuring a large motor air gap according to claim 7, wherein a motor sliding groove (13) is formed on the outer side of the bracket of the track (11), and the second motor (6) is slidably connected in the motor sliding groove (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111297921.5A CN114136223B (en) | 2021-11-04 | 2021-11-04 | Optical fiber detection device for automatically measuring air gap of large motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111297921.5A CN114136223B (en) | 2021-11-04 | 2021-11-04 | Optical fiber detection device for automatically measuring air gap of large motor |
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| CN114136223A CN114136223A (en) | 2022-03-04 |
| CN114136223B true CN114136223B (en) | 2022-08-16 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02185602A (en) * | 1989-01-11 | 1990-07-20 | Mitsubishi Heavy Ind Ltd | Device of measuring rotor blade-to-casing gap |
| CN103513664B (en) * | 2013-09-22 | 2015-10-28 | 济南大学 | The automatic centering system of sensor in aperture measuring |
| CN203704879U (en) * | 2014-03-04 | 2014-07-09 | 河北新四达电机制造有限公司 | Measuring equipment for measuring gap between stator and rotor of high-voltage motor |
| CN104061841A (en) * | 2014-06-26 | 2014-09-24 | 济钢集团有限公司 | Large motor air gap online measuring device |
| CN110530277B (en) * | 2019-07-30 | 2020-11-10 | 西安交通大学 | Wide-range sand-proof optical fiber sensing probe for measuring air gap of fan |
| CN212419162U (en) * | 2020-08-12 | 2021-01-29 | 中节能西安启源机电装备有限公司 | Punching detection device for transformer core shearing production line |
| CN213398448U (en) * | 2020-11-05 | 2021-06-08 | 平顶山市华豫永新机动车服务有限公司 | Fixing device for automobile exhaust detection probe |
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