CN111595484A - Device for measuring temperature of transformer bushing based on fluorescent optical fiber - Google Patents
Device for measuring temperature of transformer bushing based on fluorescent optical fiber Download PDFInfo
- Publication number
- CN111595484A CN111595484A CN202010420233.2A CN202010420233A CN111595484A CN 111595484 A CN111595484 A CN 111595484A CN 202010420233 A CN202010420233 A CN 202010420233A CN 111595484 A CN111595484 A CN 111595484A
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- optical fiber
- module
- transformer bushing
- temperature
- fluorescent
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 47
- 239000000523 sample Substances 0.000 claims abstract description 26
- 230000003321 amplification Effects 0.000 claims abstract description 19
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 19
- 230000005284 excitation Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 3
- 239000000835 fiber Substances 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 238000009529 body temperature measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004861 thermometry Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a device for measuring the temperature of a transformer bushing based on fluorescent optical fibers, which comprises a mounting hole arranged on an insulating magnetic ring of the transformer bushing; a connecting piece is arranged between two corresponding mounting holes of two adjacent insulating magnetic rings, an optical fiber probe is fixed on the connecting piece, and the optical fiber probe is an optical fiber probe with fluorescent substances on the end face of an optical fiber; the optical fiber probe is connected with a wavelength division multiplexing module through an optical fiber, the wavelength division multiplexing module is sequentially connected with an excitation light source and a control module, the wavelength division multiplexing module is further sequentially connected with a photoelectric conversion module and a program-controlled amplification module, and the program-controlled amplification module is connected to the control module. According to the invention, the mounting hole is designed on the insulating magnetic ring of the transformer bushing, the relative position of the top cap and the fixing plate is changed when the adjusting part is rotated, so that the fixing part extends into the mounting hole, and the adjusting part is clamped outside the mounting hole, thereby achieving the purpose of fixing the mounting plate and facilitating the fixation of the fluorescent optical fiber probe.
Description
Technical Field
The invention relates to the field of temperature measurement of transformer bushings, in particular to a device for measuring the temperature of a transformer bushing based on a fluorescent optical fiber.
Background
The transformer bushing is a main insulation device outside the transformer box, and the outgoing lines of the transformer winding must penetrate through the insulation bushing to insulate the outgoing lines and the outgoing lines from the transformer shell, and meanwhile, the transformer bushing plays a role in fixing the outgoing lines. The temperature parameter of the transformer bushing is an extremely important parameter, and the existing device is inconvenient to fix when measuring the temperature of the transformer bushing and has larger error when measuring remotely.
Therefore, there is an urgent need for a device for measuring the temperature of the transformer bushing based on fluorescent fibers to solve the above problems.
Disclosure of Invention
The invention aims to provide a device for measuring the temperature of a transformer bushing based on a fluorescent optical fiber, which solves the problem that the conventional fluorescent optical fiber measuring device is inconvenient to fix when the temperature of the transformer bushing is measured.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a device for measuring the temperature of a transformer bushing based on a fluorescent optical fiber, which comprises mounting holes formed in insulating magnetic rings of the transformer bushing, wherein each insulating magnetic ring is provided with a plurality of mounting holes, and the mounting holes on two adjacent insulating magnetic rings are corresponding to each other; a connecting piece is arranged between two corresponding mounting holes of two adjacent insulating magnetic rings, an optical fiber probe is fixed on the connecting piece, and the optical fiber probe is an optical fiber probe with fluorescent substances on the end face of an optical fiber; the optical fiber probe is connected with a wavelength division multiplexing module through an optical fiber, the wavelength division multiplexing module is sequentially connected with an excitation light source and a control module, the wavelength division multiplexing module is further sequentially connected with a photoelectric conversion module and a program control amplification module, and the program control amplification module is connected to the control module.
Furthermore, the control module is composed of an MCU microcontroller and a corresponding peripheral I/O drive circuit, a communication interface circuit, an AD acquisition circuit and a D/A output circuit, and the I/O drive circuit, the communication interface circuit, the AD acquisition circuit and the D/A output circuit are all connected to the MCU microcontroller.
Still further, the program-controlled amplification module comprises a front-end buffer, a programmable operational amplifier, a fixed amplifier and a filter circuit, wherein the front-end buffer is connected with the programmable operational amplifier, the programmable operational amplifier is connected with the fixed amplifier, the fixed amplifier is connected with the filter circuit, the filter circuit is connected with the control module through an AD acquisition circuit, and the control module is connected with the programmable operational amplifier through a D/A output circuit.
Still further, the excitation light source is a constant current LED light source with the wavelength of 405 nm.
Still further, the photoelectric conversion module converts the 695nm fluorescence signal into an electrical signal, and selects a photodiode with a corresponding waveband.
Still further, the wavelength division multiplexing module is a 1 × 2 wavelength division multiplexer, and the multiplexing wavelengths are 405nm and 695 nm.
Furthermore, the connecting piece comprises a fixed plate and top caps connected to two ends of the fixed plate, one end of each top cap is a fixed part capable of being inserted into the mounting hole, and the other end of each top cap is an adjusting part in threaded connection with the fixed plate; the diameter of the adjusting part is larger than that of the mounting hole; the fixing plate is provided with a fixing hole.
Still further, the connecting piece is made of insulating materials.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the invention, the mounting hole is designed on the insulating magnetic ring of the transformer bushing, the relative position of the top cap and the fixing plate is changed when the adjusting part is rotated, so that the fixing part extends into the mounting hole, and the adjusting part is clamped outside the mounting hole, thereby achieving the purpose of fixing the mounting plate and facilitating the fixation of the fluorescent optical fiber probe.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic view of a fiber optic probe mounting structure of the present invention;
FIG. 2 is a schematic view of a connector structure according to the present invention;
FIG. 3 is a diagram of an optical fiber thermometry overall framework of the present invention;
FIG. 4 is a block diagram of the programmable amplification module of the present invention;
FIG. 5 is a block diagram of a control module of the present invention;
description of reference numerals: 1. an insulating magnetic ring; 2. mounting holes; 3. a connecting member; 301. a fixing plate; 3011. a fixing hole; 302. a top cap; 3021. a fixed part; 3022. an adjustment section; 4. a fiber optic probe; 5. a wavelength division multiplexing module; 6. an excitation light source; 7. a control module; 8. a photoelectric conversion module; 9. a program control amplification module; 10. an MCU microcontroller; 11. an I/O driving circuit; 12. a communication interface circuit; 13. an AD acquisition circuit; 14. a D/A output circuit; 15. front end buffering; 16. a programmable operational amplifier; 17. a fixed amplifier; 18. and a filter circuit.
Detailed Description
As shown in fig. 1 and 2, one specific embodiment of a device for measuring the temperature of a transformer bushing based on a fluorescent optical fiber includes mounting holes 2 formed in insulating magnetic rings 1 of the transformer bushing, each insulating magnetic ring is provided with a plurality of mounting holes for heat dissipation on one hand and for fixing an optical fiber probe on the other hand. The mounting holes 2 on two adjacent insulating magnetic rings 1 correspond to each other, and a connecting piece 3 is arranged between two corresponding mounting holes 2 of two adjacent insulating magnetic rings 1. The connecting member 3 specifically includes a fixing plate 301 and a top cap 302 connected to two ends of the fixing plate 301, wherein one end of the top cap 302 is a fixing portion 3021 that can be inserted into the mounting hole 2, and the other end of the top cap is an adjusting portion 3022 that is screwed to the fixing plate 301. In this embodiment, the fixing ends have protruding bolts at both ends, the adjusting portions are in the form of nuts so that the top caps can be mounted at both ends of the fixing plate, and the adjusting portions are rotated so that the fixing portions are moved to both sides or to the inner side. The diameter of the adjusting part 3022 is larger than that of the mounting hole 2, so that the adjusting part can be clamped outside the mounting hole. The fixing plate 301 is provided with a fixing hole 3011, when the optical fiber probe needs to be fixed, the connecting piece is placed at a position where temperature measurement is needed, the adjusting part is rotated to enable the fixing parts at the two ends to be inserted into the mounting hole, and then the optical fiber probe is fixed in the fixing hole. In this embodiment, the connecting member 3 is made of an insulating material.
As shown in fig. 3, 4 and 5, the optical fiber probe 4 fixed to the connector for temperature measurement in this embodiment is an optical fiber probe having a fluorescent material on the end face of the optical fiber. The optical fiber probe 4 is connected with a wavelength division multiplexing module 5 through an optical fiber, the wavelength division multiplexing module 5 is sequentially connected with an excitation light source 6 and a control module 7, the wavelength division multiplexing module 5 is further sequentially connected with a photoelectric conversion module 8 and a program control amplification module 9, and the program control amplification module 9 is connected to the control module 7.
The control module mainly controls the excitation light source to emit an excitation light signal and is responsible for demodulating a fluorescent signal, the excitation light source is a light-emitting light source driven by a constant current source, the wavelength division multiplexing module is mainly responsible for separating excitation light and fluorescence from an optical fiber signal, the optical fiber probe is an optical fiber with fluorescent powder attached to one end of the optical fiber, the program-controlled amplification module is mainly used for programmably amplifying the fluorescent signal, the gain is modulated and amplified through the control module, and the photoelectric conversion module is responsible for converting the fluorescent signal transmitted from the wavelength division multiplexing module into an electric signal and finally transmitting the electric signal to the control module through the program-controlled amplification module for temperature demodulation.
The control module 7 is electrically connected with the MCU microcontroller 10 and the corresponding peripheral I/O drive circuit 11, the communication interface circuit 12, the AD acquisition circuit 13 and the D/A output circuit 14, the communication interface circuit 12 CAN be an RS485 or RS232 interface circuit or a CAN bus interface circuit, the control module 7 is connected with the excitation light source 6 through the I/O drive circuit 11, wherein the excitation light source 6 is a constant current LED light source with the wavelength of 405nm, the wavelength division multiplexing module 5 is a 1 x 2 wavelength division multiplexer, and the multiplexing wavelength is 405nm and 695 nm. The photoelectric conversion module 8 converts the 695nm fluorescence signal into an electric signal, and selects a photodiode with a corresponding waveband, wherein the program control amplification module 9 is used for self-adjusting amplification of the electric signal.
The gain control is realized by using a programmable operational amplifier with control voltage and gain in a linear relation and a variable gain amplifier with control voltage and gain in a linear relation, the program-controlled amplification module 9 comprises a front-end buffer 15, a programmable operational amplifier 16, a fixed amplifier 17 and a filter circuit 18, the front-end buffer 15 is connected with the programmable operational amplifier 16, the programmable operational amplifier 16 is connected with the fixed amplifier 17, the fixed amplifier 17 is connected with the filter circuit 18, the filter circuit 18 is connected with the control module 7 through an AD acquisition circuit 13, and the control module 7 is connected with the programmable operational amplifier 16 through a D/A output circuit 14.
The filter circuit 18 is a two-stage low-pass filter circuit, the front-end buffer 15 is a voltage follower circuit built by the operational amplifier, signals are input from the same-phase end of the operational amplifier, the feedback resistance is 0, the negative feedback is strong, the work is stable, the input impedance is large, the output impedance is small, and the impedance conversion function is achieved. The programmable operational amplifier 16 may be an AD603 or other programmable operational amplifier, and is internally composed of an R-2R ladder resistor network and a fixed gain amplifier, a signal applied to an input end of the ladder network is attenuated and then output by the fixed gain amplifier, a gain amount of the amplifier can be determined by a reference voltage loaded on a gain control interface, the reference voltage can be obtained by operating the control module 7 and controlling the D/a output circuit 14 to output a control voltage, and an intensity signal of fluorescence is acquired by the AD acquisition circuit 13, so that automatic adjustment of gain is realized.
In the method for measuring the temperature of the fluorescent optical fiber probe in the embodiment, the control module is used for setting an initial amplification gain value, the control module is used for detecting whether the signal of the fluorescence reaches the standard of temperature demodulation, if the signal does not reach the detection standard, the gain of the program control amplification module is adjusted, and vice versa. The method comprises the steps of detecting the intensity of a fluorescence signal, setting a specific gain value of a program control amplifier according to a specific numerical value of the intensity, adjusting the reference voltage of the program control amplifier if the fluorescence signal is smaller than a set threshold value, amplifying the fluorescence signal to enable the fluorescence signal to reach a standard capable of temperature demodulation, and otherwise, reducing the gain of the program control amplifier, thereby realizing automatic adjustment. When a user accesses the optical fiber probes with different lengths, the fluorescent optical fiber temperature measuring device can automatically adjust the gain of the program-controlled amplifier, so that the fluorescent optical fiber temperature measuring device can be self-adaptive to the optical fiber probes with different lengths, and can be better applied to the environment of long-distance temperature measurement.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. The utility model provides a device based on fluorescence optical fiber measurement transformer bushing temperature which characterized in that: the transformer bushing comprises mounting holes (2) formed in insulating magnetic rings (1) of a transformer bushing, wherein each insulating magnetic ring (1) is provided with a plurality of the mounting holes (2), and the mounting holes (2) in two adjacent insulating magnetic rings (1) correspond to each other; a connecting piece (3) is arranged between two corresponding mounting holes (2) of two adjacent insulating magnetic rings (1), an optical fiber probe (4) is fixed on the connecting piece (3), and the optical fiber probe (4) is an optical fiber probe with fluorescent substances on the end face of an optical fiber; the optical fiber probe (4) is connected with a wavelength division multiplexing module (5) through an optical fiber, the wavelength division multiplexing module (5) is sequentially connected with an excitation light source (6) and a control module (7), the wavelength division multiplexing module (5) is further sequentially connected with a photoelectric conversion module (8) and a program control amplification module (9), and the program control amplification module (9) is connected to the control module (7).
2. The apparatus for measuring the temperature of the transformer bushing based on the fluorescent fiber according to claim 1, wherein: the control module (7) is composed of an MCU (microprogrammed control unit) microcontroller (10) and a corresponding peripheral I/O drive circuit (11), a communication interface circuit (12), an AD acquisition circuit (13) and a D/A output circuit (14), wherein the I/O drive circuit (11), the communication interface circuit (12), the AD acquisition circuit (13) and the D/A output circuit (14) are all connected to the MCU microcontroller (10).
3. The apparatus for measuring the temperature of the transformer bushing based on the fluorescent fiber according to claim 2, wherein: the program-controlled amplification module (9) comprises a front-end buffer (15), a programmable operational amplifier (16), a fixed amplifier (17) and a filter circuit (18), wherein the front-end buffer (15) is connected with the programmable operational amplifier (16), the programmable operational amplifier (16) is connected with the fixed amplifier (17), the fixed amplifier (17) is connected with the filter circuit (18), the filter circuit (18) is connected with the control module (7) through an AD acquisition circuit (13), and the control module (7) is connected with the programmable operational amplifier (16) through a D/A output circuit (14).
4. The apparatus for measuring the temperature of the transformer bushing based on the fluorescent fiber according to claim 3, wherein: the excitation light source (6) is a constant current LED light source with the wavelength of 405 nm.
5. The apparatus for measuring the temperature of the transformer bushing based on the fluorescent fiber according to claim 4, wherein: the photoelectric conversion module (8) converts the 695nm fluorescence signal into an electric signal, and selects a photodiode with a corresponding waveband.
6. The apparatus for measuring the temperature of the transformer bushing based on the fluorescent fiber according to claim 5, wherein: the wavelength division multiplexing module (5) is a 1-2 wavelength division multiplexer, and the multiplexing wavelength is 405nm and 695 nm.
7. The apparatus for measuring the temperature of the transformer bushing based on the fluorescent fiber according to claim 1, wherein: the connecting piece (3) comprises a fixing plate (301) and top caps (302) connected to two ends of the fixing plate (301), one end of each top cap (302) is a fixing part (3021) capable of being inserted into the mounting hole (2), and the other end of each top cap is an adjusting part (3022) in threaded connection with the fixing plate (301); the diameter of the adjusting part (3022) is larger than that of the mounting hole (2); the fixing plate (301) is provided with a fixing hole (3011).
8. The apparatus for measuring the temperature of the transformer bushing based on the fluorescent fiber according to claim 1, wherein: the connecting piece (3) is made of insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420233.2A CN111595484A (en) | 2020-05-18 | 2020-05-18 | Device for measuring temperature of transformer bushing based on fluorescent optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420233.2A CN111595484A (en) | 2020-05-18 | 2020-05-18 | Device for measuring temperature of transformer bushing based on fluorescent optical fiber |
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| Publication Number | Publication Date |
|---|---|
| CN111595484A true CN111595484A (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010420233.2A Pending CN111595484A (en) | 2020-05-18 | 2020-05-18 | Device for measuring temperature of transformer bushing based on fluorescent optical fiber |
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|---|---|---|---|---|
| KR20090067323A (en) * | 2007-12-21 | 2009-06-25 | 한국철도기술연구원 | Insulating tube porcelain bushing of optical cable for transmission of electric railway current collection information |
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2020
- 2020-05-18 CN CN202010420233.2A patent/CN111595484A/en active Pending
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|---|---|---|---|---|
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Application publication date: 20200828 |
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| RJ01 | Rejection of invention patent application after publication |