CN113721061A - Non-contact wireless transmission alternating current voltage transformer based on electroluminescent device - Google Patents
Non-contact wireless transmission alternating current voltage transformer based on electroluminescent device Download PDFInfo
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- CN113721061A CN113721061A CN202111173437.1A CN202111173437A CN113721061A CN 113721061 A CN113721061 A CN 113721061A CN 202111173437 A CN202111173437 A CN 202111173437A CN 113721061 A CN113721061 A CN 113721061A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 73
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- 230000005684 electric field Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000005070 sampling Methods 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 56
- 238000000034 method Methods 0.000 claims description 13
- 229910002601 GaN Inorganic materials 0.000 claims description 4
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 4
- 239000002096 quantum dot Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
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- 238000007600 charging Methods 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/24—Voltage transformers
- H01F38/26—Constructions
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Abstract
The invention provides a non-contact wireless transmission alternating current voltage transformer based on an electroluminescent device.A photoelectric sensing module is arranged beside a high-voltage transmission line during measurement, so that an electric field excited by the working state of the transmission line forms voltage in the photoelectric sensing module and forms a detection light signal by the voltage; the optical signal integration module of the mutual inductor adjusts the detection optical signals into sampling optical signals which can be used by an optical signal receiving and processing system of the mutual inductor, and the optical signal receiving and processing system converts the sampling optical signals transmitted by the optical signal integration module into measurement electrical signals; the invention has the advantages of large measuring range, wide response frequency band, smaller volume than that of the traditional voltage transformer, simple insulating structure, no iron core and no need of driving by an active circuit, low cost, safety, convenience, easy charging, monitoring and inspection and wide application, and can transmit the peak value, the frequency and the waveform of the high-voltage transmission line to be measured to a far-end ammeter and monitoring equipment by virtue of an atmospheric channel.
Description
Technical Field
The invention relates to the technical field of electric power operation and maintenance, in particular to a non-contact wireless transmission alternating current voltage transformer based on an electroluminescent device.
Background
With the gradual development of power systems, the measurement and monitoring of power lines are rapidly developed in the light, intelligent and digital directions. In recent years, the concept of applying an intelligent power grid in power system planning is proposed for many times on various conference documents for guiding work in China, the fact that the existing power system is greatly advancing to a novel power system is announced, and part of the original technology is still to be upgraded and transformed.
At present, ultra-high voltage of 1100kV grade appears, the next voltage grade may be 1500kV or 2000kV, and with the increasing precision of industrial equipment, the precision requirements on current and voltage parameters in the circuit are higher and higher, so that more and more small-sized and flexible voltage transformers or current transformers need to be arranged when measuring overhead transmission lines. Although the industrial power equipment is required to be smaller and smaller, the traditional electromagnetic voltage transformer for instruments needs a larger insulation structure under the condition of increasing voltage grade, therefore, the traditional electromagnetic voltage transformer for instruments is difficult to meet the requirements of a new generation of power system, moreover, the development requirements of a novel power system on-line detection, high-precision fault diagnosis, a power digital network and the like cannot be kept up with, most voltage transformers work in a severe high-voltage environment, in order to perform the functions of real-time monitoring and charging, the voltage transformer needs to transmit the high-voltage measurement value of the overhead transmission line to an ammeter or monitoring equipment, and the ammeter and the monitoring equipment are both far away from the voltage transformer, therefore, a long-distance line needs to be laid, and the installation, maintenance and fault removal are difficult, so that the conventional voltage transformer still needs to be upgraded industrially.
Disclosure of Invention
The invention provides a non-contact wireless transmission alternating current voltage transformer based on an electroluminescent device, which has the functions of remote measurement, monitoring and charging, is large in measurement range, wide in response frequency band, far smaller than that of the traditional voltage transformer in volume, simple in insulation structure, free of iron core and free of driving of an active circuit, low in cost, safe and convenient, can transmit the peak value, the frequency and the waveform of a high-voltage transmission line to be measured to a far-end ammeter and monitoring equipment by means of an atmospheric channel, is easy to charge, monitor and inspect, and has wide application.
The invention adopts the following technical scheme.
The non-contact wireless transmission alternating current voltage transformer based on the electroluminescent device is characterized in that when the transformer is used for measuring a high-voltage transmission line, a photoelectric sensing module is arranged beside the high-voltage transmission line, so that an electric field excited by the working state of the transmission line forms voltage in the photoelectric sensing module and forms a detection optical signal by the voltage; the optical signal integration module (5) of the mutual inductor adjusts the detection optical signals into sampling optical signals which can be used by an optical signal receiving and processing system of the mutual inductor, and the optical signal receiving and processing system converts the sampling optical signals transmitted by the optical signal integration module into measurement electrical signals.
The power transmission line is an alternating current power transmission line; the photoelectric sensing module comprises a current loop formed by a first conductive substrate (101), a second conductive substrate (102) and an electroluminescent device (103); when the photoelectric sensing module is arranged beside a high-voltage transmission line, an electric field excited by the transmission line forms a voltage which enables the electroluminescent device to emit light at the first conductive substrate and the second conductive substrate; the light emitted by the electroluminescent device forms a detection light signal.
A first conductive substrate and a second conductive substrate which are separated by a preset separation distance are arranged between the first conductive substrate and the second conductive substrate and are supported and fixed by an insulating support module; when the mutual inductor measures the high-voltage transmission line, the first conductive substrate and the second conductive substrate form an alternating electric field under the excitation of the voltage of the transmission line, so that the electroluminescent device periodically outputs a detection optical signal;
the optical signal receiving and processing system converts the sampling optical signal into a measuring electric signal which can be used by a processor of the mutual inductor, the processor carries out error correction processing on the measuring electric signal through the data processing module and returns the measuring result data formed through processing to an operator.
The insulating support module comprises an insulating support (2), an insulating gasket (3) and an insulating clamping plate (4); the electroluminescent device comprises an electroluminescent element, a resistor, an inductor, a triode and one or more diodes;
the electroluminescent element is a conventional electroluminescent device, a gallium nitride-based electroluminescent device, an organic electroluminescent device or a quantum dot electroluminescent device, or adopts the combination of the above luminescent devices;
the shapes of the first conductive substrate and the second conductive substrate comprise rectangles, cubes, circles or irregular shapes, or combinations of the shapes.
When the mutual inductor measures the high-voltage transmission line, the first conductive substrate and the second conductive substrate are adjacent to the line to be measured and are arranged along the radial direction of the line to be measured, and the distance between the photoelectric sensing module and the line to be measured ranges from 0.1cm to 50 m; the insulating medium between the photoelectric sensing module and the circuit to be tested comprises air, insulating ceramic or insulating plastic, or a combination of the insulating media.
The light signal integration module (5) adjusts the angle of emergent light of the electroluminescent device through the lens (502) or the light reflection piece (501) or the combination of the lens and the light reflection piece, so that the emergent light of the electroluminescent device is converged to optimize the light intensity of the emergent light to form a sampling light signal.
The method for adjusting the emergent ray angle of the electroluminescent device by the optical signal integration module comprises the following steps:
method A, by combination of a lens (502) and a light reflector (501): the electroluminescent device is arranged between the reflecting cup and the convex prism, the light output direction of the reflecting cup faces the convex prism, one part of light of the electroluminescent device is reflected by the reflecting cup and converted into parallel light output by the optical signal integration module, and the other part of light is refracted by the convex prism and converted into parallel light output by the optical signal integration module;
method B, adjusting by a plurality of light reflectors: placing the electroluminescent device between the quarter-arc reflector and the half-arc prism (503), so that the light of the electroluminescent device is reflected back and forth between the quarter-arc reflector and the half-arc prism, and the light emergence angle is reduced until the light can be transmitted from the half-arc prism and then is output from the optical signal integration module;
method C, adjusting by lens: the electroluminescent device is arranged at the focus position of the convex lens, so that the light of the electroluminescent device is converted into parallel light output by the optical signal integration module through the convex lens.
Under the action of the alternating electric field, the electroluminescent device takes a built-in light emitting diode or a light emitting diode array as a light source to realize periodic light output, and light of the electroluminescent device is transmitted to the light signal integration module through air.
And an iron core device and a coil device are not arranged in the mutual inductor.
The power transmission line is an overhead power transmission line, and a time-varying electric field meeting Maxwell equations exists between the power transmission line and the ground; when the power transmission line works at power frequency voltage, the time-varying electric field can be regarded as an electric quasi-static field; when the mutual inductor measures the power transmission line, the first conductive substrate and the second conductive substrate are placed in the time-varying power field and are placed along the radial direction of the power transmission line, so that a periodically-varying potential difference is generated between the first conductive substrate and the second conductive substrate, and when the potential difference forms a forward current flowing through the electroluminescent device, the electroluminescent device emits light.
Compared with the traditional electromagnetic voltage transformer, the high-voltage power transformer has the advantages that the structure is simple, the peak value, the frequency and the waveform of the high-voltage power transmission line to be measured can be transmitted to a remote ammeter and monitoring equipment by means of an atmospheric channel, the charging, monitoring, routing inspection and maintenance are easy, and the high-voltage power transformer is convenient and fast, and does not contain an iron core.
The invention has the functions of remote measurement, monitoring and charging, has large measurement range, wide response frequency band, and far smaller volume than the traditional voltage transformer, has simple insulating structure, does not contain iron cores and does not need to be driven by an active circuit, has low cost, is safe and convenient, can transmit the peak value, the frequency and the waveform of the high-voltage transmission line to be measured to a far-end ammeter and monitoring equipment by virtue of an atmospheric channel, is easy to charge, monitor and patrol and has wide application.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic diagram of the principles of the present invention;
FIG. 2 is a schematic diagram of an optical signal integration module of the present invention using a lens and a light reflector to adjust the angle of the emergent light of an electroluminescent device;
FIG. 3 is a schematic diagram of an optical signal integration module of the present invention using a plurality of light reflectors to adjust the angle of the emergent light of the electroluminescent device;
FIG. 4 is a schematic diagram of an optical signal integration module of the present invention using a lens to adjust the angle of the emergent light of an electroluminescent device;
FIG. 5 is a schematic flow diagram of the system of the present invention;
in the figure: 2-an insulating support; 3-an insulating spacer; 4-an insulating clamp plate; 5-an optical signal integration module; 101-a first conductive substrate; 102-a second conductive substrate; 103-electroluminescent device; 501-light reflecting member; 502-a lens; 503-half arc prism.
Detailed Description
As shown in the figure, when the transformer measures a high-voltage transmission line, a photoelectric sensing module is arranged beside the high-voltage transmission line, so that an electric field excited by the working state of the transmission line forms a voltage in the photoelectric sensing module and forms a detection optical signal by the voltage; the optical signal integration module 5 of the mutual inductor adjusts the detection optical signal into a sampling optical signal which can be used by an optical signal receiving and processing system of the mutual inductor, and the optical signal receiving and processing system converts the sampling optical signal transmitted by the optical signal integration module into a measurement electrical signal.
The power transmission line is an alternating current power transmission line; the photoelectric sensing module comprises a current loop formed by a first conductive substrate 101, a second conductive substrate 102 and an electroluminescent device 103; when the photoelectric sensing module is arranged beside a high-voltage transmission line, an electric field excited by the transmission line forms a voltage which enables the electroluminescent device to emit light at the first conductive substrate and the second conductive substrate; the light emitted by the electroluminescent device forms a detection light signal.
A first conductive substrate and a second conductive substrate which are separated by a preset separation distance are arranged between the first conductive substrate and the second conductive substrate and are supported and fixed by an insulating support module; when the mutual inductor measures the high-voltage transmission line, the first conductive substrate and the second conductive substrate form an alternating electric field under the excitation of the voltage of the transmission line, so that the electroluminescent device periodically outputs a detection optical signal;
the optical signal receiving and processing system converts the sampling optical signal into a measuring electric signal which can be used by a processor of the mutual inductor, the processor carries out error correction processing on the measuring electric signal through the data processing module and returns the measuring result data formed through processing to an operator.
The insulating support module comprises an insulating support 2, an insulating gasket 3 and an insulating clamping plate 4; the electroluminescent device comprises an electroluminescent element, a resistor, an inductor, a triode and one or more diodes;
the electroluminescent element is a conventional electroluminescent device, a gallium nitride-based electroluminescent device, an organic electroluminescent device or a quantum dot electroluminescent device, or adopts the combination of the above luminescent devices;
the shapes of the first conductive substrate and the second conductive substrate comprise rectangles, cubes, circles or irregular shapes, or combinations of the shapes.
When the mutual inductor measures the high-voltage transmission line, the first conductive substrate and the second conductive substrate are adjacent to the line to be measured and are arranged along the radial direction of the line to be measured, and the distance between the photoelectric sensing module and the line to be measured ranges from 0.1cm to 50 m; the insulating medium between the photoelectric sensing module and the circuit to be tested comprises air, insulating ceramic or insulating plastic, or a combination of the insulating media.
The optical signal integration module 5 adjusts the angle of the emergent light of the electroluminescent device through the lens 502 or the optical reflector 501 or the combination of the lens and the optical reflector, so that the emergent light of the electroluminescent device is converged to optimize the light intensity thereof to form a sampling optical signal.
The method for adjusting the emergent ray angle of the electroluminescent device by the optical signal integration module comprises the following steps:
method a, adjusted by the combination of lens 502 and light reflector 501: the electroluminescent device is arranged between the reflecting cup and the convex prism, the light output direction of the reflecting cup faces the convex prism, one part of light of the electroluminescent device is reflected by the reflecting cup and converted into parallel light output by the optical signal integration module, and the other part of light is refracted by the convex prism and converted into parallel light output by the optical signal integration module;
method B, adjusting by a plurality of light reflectors: placing the electroluminescent device between the quarter-arc reflector and the half-arc prism 503 to make the light of the electroluminescent device reflected back and forth between the quarter-arc reflector and the half-arc prism, and reducing the light emergence angle until the light can be transmitted from the half-arc prism and then output from the optical signal integration module;
method C, adjusting by lens: the electroluminescent device is arranged at the focus position of the convex lens, so that the light of the electroluminescent device is converted into parallel light output by the optical signal integration module through the convex lens.
Under the action of the alternating electric field, the electroluminescent device takes a built-in light emitting diode or a light emitting diode array as a light source to realize periodic light output, and light of the electroluminescent device is transmitted to the light signal integration module through air.
And an iron core device and a coil device are not arranged in the mutual inductor.
The power transmission line is an overhead power transmission line, and a time-varying electric field meeting Maxwell equations exists between the power transmission line and the ground; when the power transmission line works at power frequency voltage, the time-varying electric field can be regarded as an electric quasi-static field; when the mutual inductor measures the power transmission line, the first conductive substrate and the second conductive substrate are placed in the time-varying power field and are placed along the radial direction of the power transmission line, so that a periodically-varying potential difference is generated between the first conductive substrate and the second conductive substrate, and when the potential difference forms a forward current flowing through the electroluminescent device, the electroluminescent device emits light.
In this embodiment, the electroluminescent device group includes, but is not limited to, a common electroluminescent device, or includes a gallium nitride-based electroluminescent device, an organic electroluminescent device, a quantum dot electroluminescent device, or a combination thereof, which can perfectly exhibit the effects described in this patent.
In this embodiment, the optical signal of the electroluminescent device passes through the free space as a transmission medium, reaches the photoelectric detection and conversion module (optical signal receiving and processing system), converts the optical signal into an electrical signal, digitizes the final effective voltage value through the data acquisition module and the processing module, and transmits the digitized final effective voltage value to the user client.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. Non-contact wireless transmission alternating current voltage transformer based on electroluminescent device, its characterized in that: when the mutual inductor measures the high-voltage transmission line, the photoelectric sensing module is arranged beside the high-voltage transmission line, so that an electric field excited by the working state of the transmission line forms voltage in the photoelectric sensing module and forms a detection optical signal by the voltage; the optical signal integration module (5) of the mutual inductor adjusts the detection optical signals into sampling optical signals which can be used by an optical signal receiving and processing system of the mutual inductor, and the optical signal receiving and processing system converts the sampling optical signals transmitted by the optical signal integration module into measurement electrical signals.
2. The wireless transmission ac voltage transformer of claim 1, wherein: the power transmission line is an alternating current power transmission line; the photoelectric sensing module comprises a current loop formed by a first conductive substrate (101), a second conductive substrate (102) and an electroluminescent device (103); when the photoelectric sensing module is arranged beside a high-voltage transmission line, an electric field excited by the transmission line forms a voltage which enables the electroluminescent device to emit light at the first conductive substrate and the second conductive substrate; the light emitted by the electroluminescent device forms a detection light signal.
3. The wireless transmission ac voltage transformer of claim 2, wherein: a first conductive substrate and a second conductive substrate which are separated by a preset separation distance are arranged between the first conductive substrate and the second conductive substrate and are supported and fixed by an insulating support module; when the mutual inductor measures the high-voltage transmission line, the first conductive substrate and the second conductive substrate form an alternating electric field under the excitation of the voltage of the transmission line, so that the electroluminescent device periodically outputs a detection optical signal;
the optical signal receiving and processing system converts the sampling optical signal into a measuring electric signal which can be used by a processor of the mutual inductor, the processor carries out error correction processing on the measuring electric signal through the data processing module and returns the measuring result data formed through processing to an operator.
4. The wireless transmission ac voltage transformer of claim 3, wherein: the insulating support module comprises an insulating support (2), an insulating gasket (3) and an insulating clamping plate (4); the electroluminescent device comprises an electroluminescent element, a resistor, an inductor, a triode and one or more diodes;
the electroluminescent element is a conventional electroluminescent device, a gallium nitride-based electroluminescent device, an organic electroluminescent device or a quantum dot electroluminescent device, or adopts the combination of the above luminescent devices;
the shapes of the first conductive substrate and the second conductive substrate comprise rectangles, cubes, circles or irregular shapes, or combinations of the shapes.
5. The wireless transmission ac voltage transformer of claim 3, wherein: when the mutual inductor measures the high-voltage transmission line, the first conductive substrate and the second conductive substrate are adjacent to the line to be measured and are arranged along the radial direction of the line to be measured, and the distance between the photoelectric sensing module and the line to be measured ranges from 0.1cm to 50 m; the insulating medium between the photoelectric sensing module and the circuit to be tested comprises air, insulating ceramic or insulating plastic, or a combination of the insulating media.
6. The wireless transmission ac voltage transformer of claim 3, wherein: the light signal integration module (5) adjusts the angle of emergent light of the electroluminescent device through the lens (502) or the light reflection piece (501) or the combination of the lens and the light reflection piece, so that the emergent light of the electroluminescent device is converged to optimize the light intensity of the emergent light to form a sampling light signal.
7. The wireless transmission ac voltage transformer of claim 6, wherein: the method for adjusting the emergent ray angle of the electroluminescent device by the optical signal integration module comprises the following steps:
method A, by combination of a lens (502) and a light reflector (501): the electroluminescent device is arranged between the reflecting cup and the convex prism, the light output direction of the reflecting cup faces the convex prism, one part of light of the electroluminescent device is reflected by the reflecting cup and converted into parallel light output by the optical signal integration module, and the other part of light is refracted by the convex prism and converted into parallel light output by the optical signal integration module;
method B, adjusting by a plurality of light reflectors: placing the electroluminescent device between the quarter-arc reflector and the half-arc prism (503), so that the light of the electroluminescent device is reflected back and forth between the quarter-arc reflector and the half-arc prism, and the light emergence angle is reduced until the light can be transmitted from the half-arc prism and then is output from the optical signal integration module;
method C, adjusting by lens: the electroluminescent device is arranged at the focus position of the convex lens, so that the light of the electroluminescent device is converted into parallel light output by the optical signal integration module through the convex lens.
8. The wireless transmission ac voltage transformer of claim 7, wherein: under the action of the alternating electric field, the electroluminescent device takes a built-in light emitting diode or a light emitting diode array as a light source to realize periodic light output, and light of the electroluminescent device is transmitted to the light signal integration module through air.
9. The wireless transmission ac voltage transformer of claim 2, wherein: and an iron core device and a coil device are not arranged in the mutual inductor.
10. The wireless transmission ac voltage transformer of claim 2, wherein: the power transmission line is an overhead power transmission line, and a time-varying electric field meeting Maxwell equations exists between the power transmission line and the ground; when the power transmission line works at power frequency voltage, the time-varying electric field can be regarded as an electric quasi-static field; when the mutual inductor measures the power transmission line, the first conductive substrate and the second conductive substrate are placed in the time-varying power field and are placed along the radial direction of the power transmission line, so that a periodically-varying potential difference is generated between the first conductive substrate and the second conductive substrate, and when the potential difference forms a forward current flowing through the electroluminescent device, the electroluminescent device emits light.
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| CN202111173437.1A CN113721061A (en) | 2021-10-09 | 2021-10-09 | Non-contact wireless transmission alternating current voltage transformer based on electroluminescent device |
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|---|---|---|---|---|
| GB1141524A (en) * | 1966-03-22 | 1969-01-29 | Standard Telephones Cables Ltd | Information link for high voltage power lines |
| JPS5827027A (en) * | 1981-08-11 | 1983-02-17 | Akai Electric Co Ltd | Photo detector |
| US5006846A (en) * | 1987-11-12 | 1991-04-09 | Granville J Michael | Power transmission line monitoring system |
| JPH06215413A (en) * | 1993-01-14 | 1994-08-05 | Ricoh Co Ltd | Optical pickup device |
| US20130293218A1 (en) * | 2012-05-03 | 2013-11-07 | Institut National D'optique | Optical sensor for non-contact voltage measurement |
| CN103969489A (en) * | 2014-05-19 | 2014-08-06 | 重庆大学 | Non-contact type overvoltage sensor based on electro-optic effect |
| CN104777344A (en) * | 2015-04-18 | 2015-07-15 | 安庆师范学院 | Non-contact type overvoltage detection system on basis of electro-optic effect |
| CN112799185A (en) * | 2021-04-14 | 2021-05-14 | 武汉恩达通科技有限公司 | Four-port circulator for single-fiber bidirectional communication and optical module |
-
2021
- 2021-10-09 CN CN202111173437.1A patent/CN113721061A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1141524A (en) * | 1966-03-22 | 1969-01-29 | Standard Telephones Cables Ltd | Information link for high voltage power lines |
| JPS5827027A (en) * | 1981-08-11 | 1983-02-17 | Akai Electric Co Ltd | Photo detector |
| US5006846A (en) * | 1987-11-12 | 1991-04-09 | Granville J Michael | Power transmission line monitoring system |
| JPH06215413A (en) * | 1993-01-14 | 1994-08-05 | Ricoh Co Ltd | Optical pickup device |
| US20130293218A1 (en) * | 2012-05-03 | 2013-11-07 | Institut National D'optique | Optical sensor for non-contact voltage measurement |
| CN103969489A (en) * | 2014-05-19 | 2014-08-06 | 重庆大学 | Non-contact type overvoltage sensor based on electro-optic effect |
| CN104777344A (en) * | 2015-04-18 | 2015-07-15 | 安庆师范学院 | Non-contact type overvoltage detection system on basis of electro-optic effect |
| CN112799185A (en) * | 2021-04-14 | 2021-05-14 | 武汉恩达通科技有限公司 | Four-port circulator for single-fiber bidirectional communication and optical module |
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