WO2012119429A1

WO2012119429A1 - Making method and integrated system for pre-embedding fiber grating sensor in magnetic wire

Info

Publication number: WO2012119429A1
Application number: PCT/CN2011/079159
Authority: WO
Inventors: 伍志荣; 程林; 林日磊; 聂德鑫; 关庆华; 陈江波; 周建华; 郭涛; 徐秋元
Original assignee: 国网电力科学研究院武汉南瑞有限责任公司
Priority date: 2011-03-08
Filing date: 2011-08-31
Publication date: 2012-09-13
Also published as: CN102183319A; CN102183319B

Abstract

A making method for pre-embedding a fiber grating sensor in a magnetic wire, includes: employing a magnetic wire (9) with a slot; enabling the fiber grating sensor (2) to pass through a fiber payingoff wheel (3); and enabling the fiber grating sensor (2) and the magnetic wire (9) with the slot to enter into an oil injection device(4) and to pass through a guide device (5) together, so as to position the fiber grating sensor (2) in the slot of the magnetic wire; then carrying out insulation paper lapping and forming by a paper lapping device (6); conveying the formed product to a wire takeup device (8) through a traction device (7); finally obtaining the magnetic wire pre-embedded with the fiber grating sensor (2). An integrated system for pre-embedding a fiber grating sensor in a magnetic wire is also provided. The making method and the integrated system for pre-embedding the fiber grating sensor in the magnetic wire have the advantages of simple preparation process and excellent pre-embedding effect. The magnetic wire pre-embedded with the fiber grating sensor has favorable temperature sensing property and is not influenced by stress. By connecting a plurality of fiber grating sensors to a single optical fiber in series and forming a quasi-distributed sensing network by the use of a multiplexing technology, the direct measurement of temperature inside the magnetic wire is realized.

Description

Description of the method for preparing a FBG sensor embedded in a magnet wire and a complete system

The invention relates to the field of fiber grating sensing and transformer state monitoring, and particularly to a method and a complete system for pre-burying a fiber grating sensor in a magnet wire, wherein the electromagnetic fiber embedded fiber grating sensor is used for temperature measurement inside the transformer . Background technique

The fiber Bragg grating sensor has the advantages of anti-electromagnetic interference, high sensitivity, small size, easy to embed, easy to realize single-fiber multi-point, multi-parameter quasi-distributed measurement by using multiplexing technology, monitoring the hot spot temperature of the transformer winding and realizing the intelligence of the transformer. It provides a new way. Invention patent ZL201010273400. 1 ("A method and system for detecting internal temperature of transformer based on fiber grating") A method and system for realizing internal temperature detection of transformer by using fiber grating sensor are proposed, but the fiber grating sensor is not embedded. In the method of manufacturing the electromagnetic wire, how to realize the arrangement of the fiber grating sensor inside the electromagnetic wire is the key to realizing the direct measurement of the internal temperature of the transformer winding.

In view of the above, it is necessary to provide a method and a system for pre-embedding a fiber Bragg grating sensor in a magnet wire to meet the needs of industrial applications. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and a complete system for pre-burying a FBG sensor in a magnet wire in order to solve the problem of arranging the FBG sensor inside the electromagnetic wire.

The technical solution adopted by the present invention is: a complete system for pre-burying a fiber Bragg grating sensor in a magnet wire, characterized in that: a pay-off device, a fiber-removing wheel, an oiler, a guiding device, a wrapping device, a traction device, The wire-receiving device and the bracket are composed of a fiber-removing wheel, a lubricator and a guiding device, which are sequentially fixed on the bracket, wherein: the wire-laying device has two upper and lower pay-distributing disks, respectively, and a fiber grating sensor and a slotted electromagnetic wire are respectively installed; The fiber release wheel is located on the right side of the pay-off device, and its vertical orientation is adjustable; the guiding device is located between the oiler and the wrapping device, and the guiding device comprises a V-shaped groove guide wheel, a horizontal guide wheel and two vertical guide wheels. The V-shaped groove guide wheel and the horizontal guide wheel axis are parallel, the two vertical guide wheels are vertically parallel; the oiler is located on the line side of the V-groove guide wheel of the guiding device; the wrapping device is located at the guiding device Between the traction device and the traction device, the replacement page is replaced (fine ¹ is 26) The disposed FBG sensor and the electromagnetic wire are wrapped by an insulating paper by a wrapping device; the traction device is located between the wrapping device and the take-up device, and the traction device comprises a crawler traction mechanism and a variable frequency motor, which is pulled by the crawler traction mechanism a magnetic wire formed by wrapping paper, a wrapping device and a traction device are connected by a synchronous toothed belt and driven by a variable frequency motor; the wire take-up device is located on the right side of the traction device, and the wire take-up device includes a take-up reel for winding the last A prepared electromagnetic wire embedded with a fiber grating sensor.

As described above, the FBG sensor is embedded in a complete system of electromagnetic wires, and is characterized in that a damper is mounted on the shaft of the pay-distributing disk on which the electromagnetic wire is located, and the tension of the pay-off wire can be adjusted.

A complete system in which a fiber Bragg grating sensor is embedded in a magnet wire as described above, characterized in that the traction device is said to be

The crawler traction mechanism adopts a synchronous toothed belt, and one of the upper and lower traction belts is pneumatically pressed, and the pressing force is provided by the upper and lower two cylinders on the traction device. Book

The present invention also provides a method for fabricating a fiber Bragg grating sensor embedded in a magnet wire, which is produced by the kit system as described above, and is characterized in that it comprises the following steps: pre-machining a magnet wire into a strip groove and rounding Angle, a slotted electromagnetic wire is produced; a plurality of fiber gratings are written by a single fiber according to the spacing of the monitoring points to obtain a fiber grating sensor; the fiber grating sensor and the slotted electromagnetic wire are simultaneously discharged from the wire reel After the fiber grating sensor passes through the fiber release wheel, passes through the oiler together with the slotted electromagnetic wire, and passes through the guiding device to realize the positioning of the fiber grating sensor in the slotted electromagnetic wire slot, and then is insulated by the wrapping device. The paper is wrapped and then sent to the take-up device via the traction device, and finally the electromagnetic wire of the pre-embedded fiber grating sensor is obtained.

The invention has the beneficial effects that the electromagnetic wire of the pre-embedded fiber grating sensor prepared by the method and the complete system of the invention has simple preparation process and excellent embedding effect, and the prepared electromagnetic wire embedded fiber grating sensor is not affected by stress, With good temperature sensing performance, multiple fiber grating sensors can be connected in series on a single fiber, and a quasi-distributed sensing network can be formed by multiplexing technology to realize direct measurement of the internal temperature of the electromagnetic wire, which provides real-time online monitoring of the transformer. The new approach provides reliable support for improving the service life of the transformer, ensuring its safety, reliability, economic operation and intelligentization of the transformer, and provides a strong theoretical guidance for the design improvement of the transformer. DRAWINGS

1 is a schematic view showing the system structure of a complete system in which a fiber Bragg grating sensor is embedded in a magnet wire according to an embodiment of the present invention.

2

Replacement page (Article 26) 2 is a schematic structural view of a guiding device in a complete system according to an embodiment of the present invention. detailed description

DESCRIPTION OF REFERENCE NUMERALS: 1-distribution device, 2-fiber grating sensor, 3-fiber-removing wheel, 4-oiler, 5-guide device, 6-paper wrapping device, 7-tracting device, 8-winding device , 9-slotted magnet wire, 10 - bracket, 501-V groove guide wheel, 502-vertical guide wheel, 503-horizontal guide wheel.

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

As shown in FIG. 1, the present invention provides a complete system for pre-burying a fiber Bragg grating sensor in a magnet wire,

The wire discharging device 1, the fiber releasing wheel 3, the oiler 4, the guiding device 5, the wrapping device 6, the pulling device 7, the wire take-up device 8, and the bracket 10, the fiber releasing wheel 3, the oiler 4 and the book guide device 5 is sequentially fixed to the bracket 10.

The payout device 1 has two upper and lower payout reels for winding the FBG sensor 2, and the lower reel is for winding the slotted magnet wire 9.

The FBG sensor 2 is formed by writing a plurality of fiber gratings at a pitch of monitoring points by a single fiber, that is, the FBG sensor 2 is a single fiber having a grating sensor function. The slotted magnet wire 9 is formed by pre-forming a groove having a depth of 0.6 mm and a width of 1.2 m and rounding the wide side of the ordinary magnet wire.

The FBG sensor 2 and the slotted electromagnetic wire 9 are fixed on the payout reel of the payout device 1, and at the same time, a damper is mounted on the reel shaft of the magnet wire to adjust the tension of the payout.

The fiber release wheel 3 is fixed to the bracket 10, and its position in the vertical direction is adjustable, which can control the tension of the fiber release, achieve constant low tension fiber discharge, and reduce fluctuations.

As shown in FIG. 2, the guiding device 5 includes a V-groove guide wheel 501, a horizontal guide wheel 503 and a vertical guide wheel 502 for positioning the fiber grating sensor 2 and the slotted electromagnetic wire 9, ensuring that the fiber grating sensor 2 is It is accurately guided into the groove of the slotted magnet wire 9. The V-shaped groove guide wheel 501 and the horizontal guide wheel 503 are parallel to each other, and a small gap is reserved between the grooved electromagnetic wire 9 for positioning the fiber grating sensor 2 in the slot of the electromagnetic wire 9; Wheel 502 is used for positioning of the magnet wire 9 in the horizontal direction.

The oiler 4 is mounted on the line side of the V-groove guide wheel 501 of the guiding device 5 for continuously filling the transformer oil, reducing the friction between the fiber grating sensor 2 and the slotted electromagnetic wire 9, and simultaneously making the fiber grating The sensor 2 is attached to the groove of the slotted magnet wire 9.

The wrapping device 6 is located between the guiding device 5 and the traction device 7, and the optical fiber light after passing through the guiding device 5

3

Replacement page (Article 26) The grid sensor 2 and the electromagnetic wire 9 are wrapped by an insulating paper by a wrapping device 6.

The traction device 7 is located between the wrapping device 6 and the wire take-up device 8. The traction device 7 comprises a crawler traction mechanism and a variable frequency motor. The crawler traction mechanism drives the electromagnetic wire formed by the wrapping paper, and the crawler traction mechanism adopts a synchronous toothed belt. One of the upper and lower traction belts is pneumatically pressed, and the pressing force is provided by the upper and lower two cylinders on the traction device.

The wrapping device 6 and the traction device 7 are connected by a synchronous toothed belt and driven by a variable frequency motor to realize synchronization of the wrapping paper and the traction, and reduce the fluctuation, so that the FBG sensor 2 is freely embedded when the slotted electromagnetic wire 9 is buried. . Said that the wire take-up device 8 is located on the right side of the traction device, and the wire take-up device 8 includes a take-up reel for winding the final book

The electromagnetic wire of the fiber grating sensor is embedded, and the turning of the take-up reel is opposite to the turning of the pay-distributing disk in the pay-off device 1 to realize the embedding of the fiber grating sensor 2 inside the slotted electromagnetic wire 9. The wire take-up device 8 adopts a self-propelled gantry structure, and realizes automatic cable arranging through a digital intelligent wire arranging device and a frequency converter.

The present invention also provides a method of fabricating a fiber Bragg grating sensor in a magnet wire, comprising the kit system as described above, comprising the steps of:

The magnetic wire is pre-machined into a strip groove and rounded to obtain a slotted electromagnetic wire 9;

Using a single optical fiber to write a plurality of fiber gratings at intervals of the monitoring points to obtain a fiber grating sensor 2; the fiber grating sensor 2 and the slotted electromagnetic wire 9 are simultaneously taken out from the payout disk by the payout device 1, the fiber grating sensor 2 After passing through the fiber release wheel 3, it passes through the oiler 4 together with the slotted electromagnetic wire 9 and passes through the guiding device 5 together, thereby realizing the positioning of the fiber grating sensor 2 in the slot of the slotted electromagnetic wire 9, and then passing through the wrapping device 6 The insulating paper is wrapped and then sent to the take-up device 8 via the pulling device 7, and finally the electromagnetic wire of the pre-embedded fiber grating sensor is obtained.

4

Replacement page (Article 26)

Claims

Claim

1. A complete system for pre-burying a fiber Bragg grating sensor in a magnet wire, characterized in that it consists of a pay-off device, a fiber-removing wheel, an oiler, a guiding device, a wrapping device, a traction device, a wire-receiving device and a bracket, The fiber-removing wheel, the oil-filling device and the guiding device are sequentially fixed on the bracket, wherein: the wire-laying device has two upper and lower pay-distributing disks, respectively respectively installing a fiber grating sensor and a slotted electromagnetic wire; the fiber-removing wheel is located at the pay-off line The vertical direction of the device is adjustable; the guiding device is located between the oiler and the wrapping device, and the guiding device comprises a V-shaped groove guide wheel, a horizontal guide wheel and two vertical guide wheels, and the V-shaped groove guide wheel Parallel to the horizontal guide wheel axis, the two vertical guide wheels are vertically parallel; the oiler is located on the line side of the V-groove guide wheel of the guiding device; the wrapping device is located between the guiding device and the traction device, The fiber grating sensor and the electromagnetic wire after the guiding device are wrapped by the insulating paper by the wrapping device; the hearing traction device is located between the wrapping device and the wire take-up device, and the traction device includes The traction mechanism and the variable frequency motor are driven by the crawler traction mechanism to draw the electromagnetic wire formed by the wrapping paper, and the wrapping device and the traction device are connected by the synchronous toothed belt and driven by the variable frequency motor; the wire take-up device is located on the right side of the traction device, and the wire is taken up The apparatus includes a take-up reel for winding the resulting electromagnetic wire embedded with the fiber grating sensor.

2. A system for pre-embeding a fiber Bragg grating sensor in a magnet wire according to claim 1, wherein a damper is mounted on the shaft of the payoff reel on which the magnet wire is placed, and the tension of the pay line can be adjusted.

3. The complete system for pre-burying a fiber Bragg grating sensor in a magnet wire according to claim 1, wherein the crawler traction mechanism of the traction device adopts a same toothed belt, and one of the upper and lower traction belts is pneumatically pressed. The pressing force is provided by the upper and lower two cylinders on the traction device.

4. A method for pre-embeding a fiber Bragg grating sensor in a magnet wire, which is produced by the kit system of claim 1, comprising the steps of: pre-machining a magnet wire into a strip groove and pouring it Fillet, to obtain a slotted electromagnetic wire; use a single fiber to write a plurality of fiber gratings at intervals of monitoring points to obtain a fiber grating sensor; a fiber grating sensor and a slotted electromagnetic wire through a pay-off device simultaneously from a pay-off disk On the upper lead, after the fiber grating sensor passes through the fiber release wheel, passes through the oiler together with the slotted electromagnetic wire, and passes through the guiding device to realize the positioning of the fiber grating sensor in the slotted electromagnetic wire slot, and then through the wrapping device The insulating paper is wrapped and then sent to the take-up device through the traction device, and finally the electromagnetic wire of the pre-embedded fiber grating sensor is obtained.