CN105466940A - Inflatable current transformer defect monitoring device - Google Patents
Inflatable current transformer defect monitoring device Download PDFInfo
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- CN105466940A CN105466940A CN201510784620.3A CN201510784620A CN105466940A CN 105466940 A CN105466940 A CN 105466940A CN 201510784620 A CN201510784620 A CN 201510784620A CN 105466940 A CN105466940 A CN 105466940A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
The invention relates to an inflatable current transformer defect monitoring device. The monitoring device comprises an inflatable voltage transformer body, an image recognition device and a Freescale IMX6 processor. The image recognition device extracts frame sub-images from the surface image of the inflatable voltage transformer body; and the Freescale IMX6 processor is connected with the image recognition device, and used for determining the type of frame defect based on the frame sub-images. The device provided by the invention can conduct defect type analysis on the frame surface of the inflatable voltage transformer body, thus providing important reference data for inspection tour of maintenance staff.
Description
Technical field
The present invention relates to power domain, particularly relate to a kind of gas-filled type current transformer defect inspection device.
Background technology
Current.Along with the continuous application of a lot of new material, there is a lot of new kind in mutual inductor, electromagnetic transformer obtains and develops more fully, and wherein core type current transformer has adapted to the growth requirement of power construction with dry type, oil immersed type and gas-insulating type various structures.
Mutual inductor principle of work is as follows: in the circuit of power consumption, and electric current difference is from a few peace to a little Wan An, and voltage phase difference is from a few volt to millions of volt.In circuit, current/voltage is all higher, is breakneck as directly measured.Measure for ease of secondary instrument and need to be converted to more unified current/voltage, use mutual inductor to play the effect of variable flow and variable pressure and electrical isolation.Displaying Meter major part is the current voltmeter of pointer-type, so the secondary current great majority of current transformer are ampere level (as 5 etc.).Along with era development, electrical measurement reaches digitizing mostly, and the signal of the sampling of computing machine is generally milliampere level (0-5V, 4-20mA etc.).Micro-transformer of current secondary current is milliampere level, the main function served as bridge risen between large mutual inductor and sampling.Micro-transformer of current is referred to as " instrument current transformer ".
But there is following defect in existing gas-filled type current transformer: (1) unreasonable structure, the defect that qualification rate is lower; (2) gas-filled type current transformer itself lacks the self-examination mechanism to its main body framework, cannot provide valuable skeleton defect information, easily cause gas-filled type current transformer to obtain and safeguard targetedly for maintainer.
In order to overcome above-mentioned defect, the present invention proposes a kind of gas-filled type current transformer defect inspection device, the framework of gas-filled type current transformer in prior art can be optimized, improve the quality of product, add a main body framework self-check equipment on this basis, thus relevant skeleton defect parameters can be provided for the maintenance department of gas-filled type current transformer.
Summary of the invention
In order to solve the technical matters that prior art exists, the invention provides a kind of gas-filled type current transformer defect inspection device, utilize targetedly, can be used for the various image processing apparatus that gas-filled type current transformer main body framework detects and realize identification and the type detection of skeleton defect, administrative authority is transferred to by improved bluetooth communications link, improve existing gas-filled type current transformer inner structure simultaneously, improve the qualification rate of product.
According to an aspect of the present invention, provide a kind of gas-filled type current transformer defect inspection device, described monitoring device comprises inflatable voltage transformer (VT) main body, image recognition apparatus and Freescale IMX6 processor, described image recognition apparatus extracts skeleton subimage from the surface image of inflatable voltage transformer (VT) main body, described Freescale IMX6 processor is connected with described image recognition apparatus, for based on described skeleton subimage determination skeleton defect kind.
More specifically, in described gas-filled type current transformer defect inspection device, comprise: inflatable voltage transformer (VT) main body, comprise base, secondary terminal box, secondary lead wires sleeve pipe, iron core, transformer casing, once to go between sleeve pipe, burst disk, compound insulating sleeve and silastic-layer; Compound insulating sleeve is positioned at above base, is cylindrical structural; Transformer casing is arranged on above compound insulating sleeve, for cylindrical structural and cross sectional radius is the twice of compound insulating sleeve cross sectional radius; Burst disk is arranged on the top of transformer casing; Silastic-layer is wrapped in the outside of compound insulating sleeve; Secondary terminal box is positioned at the side of base, for accessing secondary lead wires; Secondary lead wires sleeve pipe is positioned at the inside of compound insulating sleeve, is connected with secondary terminal box, for the secondary lead wires of secondary terminal box being linked on iron core to form Secondary Winding; Once go between the sleeve pipe lateral direction penetrating central authorities at transformer casing, once goes between for access, and once will go between and be linked on iron core to form a winding; Compound insulating sleeve is that glass fibre and resin-bonded manufacture form; SD storer, for having prestored threshold number of pixels and various defect image feature; High-definition camera equipment, is arranged on the opposite of described inflatable voltage transformer (VT) main body, for taking the surface of described inflatable voltage transformer (VT) main body, to obtain corresponding surface image; Gauss's denoising equipment, with described high-definition camera equipment connection, for carrying out Gauss's denoising to receiving surface image, to obtain denoising image; Smoothing processing equipment, with described Gauss's denoising equipment connection, for the smoothing process of denoising image received, to obtain smoothed image; Gray processing treatment facility, with described smoothing processing equipment connection, for carrying out gray processing process to the smoothed image received, to obtain gray level image; Column border checkout equipment, is connected respectively with described gray processing treatment facility and described SD storer, for described gray level image, calculates the number of often row black picture element, and the row that the number of black picture element is more than or equal to described threshold number of pixels are designated as edge columns; Row rim detection equipment, is connected respectively with described gray processing treatment facility and described SD storer, for described gray level image, calculates the number of often row black picture element, and the row that the number of black picture element is more than or equal to described threshold number of pixels is designated as edge lines; Skeleton splitting equipment, be connected respectively with described column border checkout equipment and described row rim detection equipment, region edge columns and edge lines interweaved is as mutual inductor skeleton domain of the existence, and from described gray level image, be partitioned into described mutual inductor skeleton domain of the existence to export as skeleton subimage, the background of skeleton subimage from gray level image to be separated; Freescale IMX6 processor, is connected respectively with described skeleton splitting equipment and described SD storer, is mated by described skeleton subimage with various defect image feature, and the successful kind of output matching is as skeleton defect kind; Display device, is connected with Freescale IMX6 processor, for showing skeleton defect kind in real time; Bluetooth communication equipment, is connected with the electrical management server of Freescale IMX6 processor and far-end, for skeleton defect kind is sent to electrical management server place in real time by bluetooth communications link; Wherein, Gauss's denoising equipment, smoothing processing equipment, gray processing treatment facility, column border checkout equipment, row rim detection equipment and skeleton splitting equipment are integrated on one piece of surface-mounted integrated circuit; Wherein, described Bluetooth communication equipment comprises the first search subset, the second search subset and coupling connexon equipment; Wherein, the first search subset, according to the highest micro bluetooth network of MAC Address concentration determination Bluetooth MAC address concentration in Bluetooth Scatternet as target piconet, a Bluetooth Scatternet is made up of multiple micro bluetooth network; Second search subset, searches for subset be connected with described first, in described target piconet, finds, quantity preceding by signal intensity rank and is not more than one or more Bluetooth communication equipments of 7 as one or more target Bluetooth devices; Coupling connexon equipment, search for subset be connected with described second, startup is connected with the Bluetooth communication of described one or more target Bluetooth devices; Wherein, when there being the quantity of Bluetooth communication equipment of signal for being more than or equal to 7 in described target piconet, the quantity of described one or more target Bluetooth devices is 7, when there being the quantity of Bluetooth communication equipment of signal for being less than 7 in described target piconet, the quantity of described one or more target Bluetooth devices is the quantity of the Bluetooth communication equipment having signal in described target piconet.
More specifically, in described gas-filled type current transformer defect inspection device: the resolution of high-definition camera equipment is 3840 × 2160.
More specifically, in described gas-filled type current transformer defect inspection device: high-definition camera equipment comprises cmos sensor, luminance sensor and secondary light source.
More specifically, in described gas-filled type current transformer defect inspection device: the light intensity of the ambient brightness determination secondary light source that high-definition camera equipment exports according to luminance sensor.
More specifically, in described gas-filled type current transformer defect inspection device: silastic-layer adopts silicon rubber umbrella skirt structure, for combining closely with compound insulating sleeve.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:
Fig. 1 is the block diagram of gas-filled type current transformer defect inspection device of the present invention.
Fig. 2 is the block diagram of the Bluetooth communication equipment of gas-filled type current transformer defect inspection device of the present invention.
Reference numeral: 1 inflatable voltage transformer (VT) main body; 2 image recognition apparatus; 3 Freescale IMX6 processors; 4 first search subsets; 5 second search subsets; 6 coupling connexon equipment
Embodiment
Below with reference to accompanying drawings the embodiment of gas-filled type current transformer defect inspection device of the present invention is described in detail.
Current transformer, it utilizes the proportional feature of transformer primary, secondary current to make.Its principle of work, equivalent circuit are also identical with general transformer, and just its former limit windings in series is in circuit-under-test, and the number of turn is little; Vice-side winding connects the low-impedance load such as reometer, relay current coil, near short circuit.Primary current (i.e. tested electric current) and secondary current depend on the load of test line, and have nothing to do with the secondary load of current transformer.Because secondary is close to short circuit, so former and deputy polygonal voltage U1 and all very little, exciting current I0 is also very little.When current transformer runs, secondary does not allow open circuit.Because once open circuit, primary current all becomes exciting current, makes magnetic flux and secondary voltage substantially exceed normal value and jeopardize the person and device security.Therefore, mustn't fuse be connect in current transformer secondary loop, also not allow operationally just to pull down the equipment such as reometer, relay without bypass.The mode of connection of current transformer by its connect load service requirement determine.The most frequently used mode of connection is single-phase, three-phase star and incomplete star.
Gas-filled type current transformer is type the most common in current transformer, but, there is unreasonable structure, defect that qualification rate is lower in gas-filled type current transformer of the prior art, gas-filled type current transformer of the prior art itself lacks the efficient diagnosis mechanism to its main body framework fault of construction simultaneously, cannot provide reference information for associated maintenance department.
For this reason, the present invention has built a kind of gas-filled type current transformer defect inspection device, the framework of gas-filled type current transformer in prior art can be improved, improve the quality of product, add the self-monitoring equipment of skeleton defect on this basis, the type of skeleton defect can be identified, and, transform existing Bluetooth communication mechanism, improve the efficiency of Bluetooth communication, for the transmission of mutual inductor on site information provides effective means.
Fig. 1 is the block diagram of gas-filled type current transformer defect inspection device of the present invention, described monitoring device comprises inflatable voltage transformer (VT) main body, image recognition apparatus and Freescale IMX6 processor, described image recognition apparatus extracts skeleton subimage from the surface image of inflatable voltage transformer (VT) main body, described Freescale IMX6 processor is connected with described image recognition apparatus, for based on described skeleton subimage determination skeleton defect kind.
Then, gas-filled type current transformer defect inspection device of the present invention is specifically described.
Described monitoring device comprises: inflatable voltage transformer (VT) main body, comprises base, secondary terminal box, secondary lead wires sleeve pipe, iron core, transformer casing, once to go between sleeve pipe, burst disk, compound insulating sleeve and silastic-layer; Compound insulating sleeve is positioned at above base, is cylindrical structural; Transformer casing is arranged on above compound insulating sleeve, for cylindrical structural and cross sectional radius is the twice of compound insulating sleeve cross sectional radius; Burst disk is arranged on the top of transformer casing; Silastic-layer is wrapped in the outside of compound insulating sleeve; Secondary terminal box is positioned at the side of base, for accessing secondary lead wires; Secondary lead wires sleeve pipe is positioned at the inside of compound insulating sleeve, is connected with secondary terminal box, for the secondary lead wires of secondary terminal box being linked on iron core to form Secondary Winding; Once go between the sleeve pipe lateral direction penetrating central authorities at transformer casing, once goes between for access, and once will go between and be linked on iron core to form a winding; Compound insulating sleeve is that glass fibre and resin-bonded manufacture form.
Described monitoring device comprises: SD storer, for having prestored threshold number of pixels and various defect image feature; High-definition camera equipment, is arranged on the opposite of described inflatable voltage transformer (VT) main body, for taking the surface of described inflatable voltage transformer (VT) main body, to obtain corresponding surface image; Gauss's denoising equipment, with described high-definition camera equipment connection, for carrying out Gauss's denoising to receiving surface image, to obtain denoising image; Smoothing processing equipment, with described Gauss's denoising equipment connection, for the smoothing process of denoising image received, to obtain smoothed image; Gray processing treatment facility, with described smoothing processing equipment connection, for carrying out gray processing process to the smoothed image received, to obtain gray level image.
Described monitoring device comprises: column border checkout equipment, be connected respectively with described gray processing treatment facility and described SD storer, for to described gray level image, calculate the number of often row black picture element, the row that the number of black picture element is more than or equal to described threshold number of pixels are designated as edge columns; Row rim detection equipment, is connected respectively with described gray processing treatment facility and described SD storer, for described gray level image, calculates the number of often row black picture element, and the row that the number of black picture element is more than or equal to described threshold number of pixels is designated as edge lines; Skeleton splitting equipment, be connected respectively with described column border checkout equipment and described row rim detection equipment, region edge columns and edge lines interweaved is as mutual inductor skeleton domain of the existence, and from described gray level image, be partitioned into described mutual inductor skeleton domain of the existence to export as skeleton subimage, the background of skeleton subimage from gray level image to be separated.
Described monitoring device comprises: Freescale IMX6 processor, is connected respectively with described skeleton splitting equipment and described SD storer, is mated by described skeleton subimage with various defect image feature, and the successful kind of output matching is as skeleton defect kind; Display device, is connected with Freescale IMX6 processor, for showing skeleton defect kind in real time; Bluetooth communication equipment, is connected with the electrical management server of Freescale IMX6 processor and far-end, for skeleton defect kind is sent to electrical management server place in real time by bluetooth communications link.Wherein, Gauss's denoising equipment, smoothing processing equipment, gray processing treatment facility, column border checkout equipment, row rim detection equipment and skeleton splitting equipment are integrated on one piece of surface-mounted integrated circuit.
As shown in Figure 2, described Bluetooth communication equipment comprises the first search subset, the second search subset and coupling connexon equipment; First search subset, according to the highest micro bluetooth network of MAC Address concentration determination Bluetooth MAC address concentration in Bluetooth Scatternet as target piconet, a Bluetooth Scatternet is made up of multiple micro bluetooth network; Second search subset, searches for subset be connected with described first, in described target piconet, finds, quantity preceding by signal intensity rank and is not more than one or more Bluetooth communication equipments of 7 as one or more target Bluetooth devices; Coupling connexon equipment, search for subset be connected with described second, startup is connected with the Bluetooth communication of described one or more target Bluetooth devices; When there being the quantity of Bluetooth communication equipment of signal for being more than or equal to 7 in described target piconet, the quantity of described one or more target Bluetooth devices is 7, when there being the quantity of Bluetooth communication equipment of signal for being less than 7 in described target piconet, the quantity of described one or more target Bluetooth devices is the quantity of the Bluetooth communication equipment having signal in described target piconet.
Alternatively, in described gas-filled type current transformer defect inspection device: the resolution of high-definition camera equipment is 3840 × 2160; High-definition camera equipment comprises cmos sensor, luminance sensor and secondary light source; The light intensity of the ambient brightness determination secondary light source that high-definition camera equipment exports according to luminance sensor; Silastic-layer can select silicon rubber umbrella skirt structure, for combining closely with compound insulating sleeve.
In addition, current transformer, it utilizes the proportional feature of transformer primary, secondary current to make.Its principle of work, equivalent circuit are also identical with general transformer, and just its former limit windings in series is in circuit-under-test, and the number of turn is little; Vice-side winding connects the low-impedance load such as reometer, relay current coil, near short circuit.Primary current (i.e. tested electric current) and secondary current depend on the load of test line, and have nothing to do with the secondary load of current transformer.Because secondary is close to short circuit, so former and deputy polygonal voltage U1 and all very little, exciting current I0 is also very little.When current transformer runs, secondary does not allow open circuit.Because once open circuit, primary current all becomes exciting current, makes magnetic flux and secondary voltage substantially exceed normal value and jeopardize the person and device security.Therefore, mustn't fuse be connect in current transformer secondary loop, also not allow operationally just to pull down the equipment such as reometer, relay without bypass.The mode of connection of current transformer by its connect load service requirement determine.The most frequently used mode of connection is single-phase, three-phase star and incomplete star.
Adopt gas-filled type current transformer defect inspection device of the present invention, skeleton self-monitoring technical matters is lacked for gas-filled type current transformer unreasonable structure in prior art, by optimizing gas-filled type current transformer structure, being provided with the performance that the mode of optimized device targetedly improves mutual inductor, completed the category identification of mutual inductor skeleton defect simultaneously by a series of parts of high-precision image processing targetedly, thus solve above-mentioned technical matters.
Be understandable that, although the present invention with preferred embodiment disclose as above, but above-described embodiment and be not used to limit the present invention.For any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (6)
1. a gas-filled type current transformer defect inspection device, described monitoring device comprises inflatable voltage transformer (VT) main body, image recognition apparatus and Freescale IMX6 processor, described image recognition apparatus extracts skeleton subimage from the surface image of inflatable voltage transformer (VT) main body, described Freescale IMX6 processor is connected with described image recognition apparatus, for based on described skeleton subimage determination skeleton defect kind.
2. gas-filled type current transformer defect inspection device as claimed in claim 1, it is characterized in that, described monitoring device comprises:
Inflatable voltage transformer (VT) main body, comprises base, secondary terminal box, secondary lead wires sleeve pipe, iron core, transformer casing, once to go between sleeve pipe, burst disk, compound insulating sleeve and silastic-layer;
Compound insulating sleeve is positioned at above base, is cylindrical structural;
Transformer casing is arranged on above compound insulating sleeve, for cylindrical structural and cross sectional radius is the twice of compound insulating sleeve cross sectional radius;
Burst disk is arranged on the top of transformer casing;
Silastic-layer is wrapped in the outside of compound insulating sleeve;
Secondary terminal box is positioned at the side of base, for accessing secondary lead wires;
Secondary lead wires sleeve pipe is positioned at the inside of compound insulating sleeve, is connected with secondary terminal box, for the secondary lead wires of secondary terminal box being linked on iron core to form Secondary Winding;
Once go between the sleeve pipe lateral direction penetrating central authorities at transformer casing, once goes between for access, and once will go between and be linked on iron core to form a winding;
Compound insulating sleeve is that glass fibre and resin-bonded manufacture form;
SD storer, for having prestored threshold number of pixels and various defect image feature;
High-definition camera equipment, is arranged on the opposite of described inflatable voltage transformer (VT) main body, for taking the surface of described inflatable voltage transformer (VT) main body, to obtain corresponding surface image;
Gauss's denoising equipment, with described high-definition camera equipment connection, for carrying out Gauss's denoising to receiving surface image, to obtain denoising image;
Smoothing processing equipment, with described Gauss's denoising equipment connection, for the smoothing process of denoising image received, to obtain smoothed image;
Gray processing treatment facility, with described smoothing processing equipment connection, for carrying out gray processing process to the smoothed image received, to obtain gray level image;
Column border checkout equipment, is connected respectively with described gray processing treatment facility and described SD storer, for described gray level image, calculates the number of often row black picture element, and the row that the number of black picture element is more than or equal to described threshold number of pixels are designated as edge columns;
Row rim detection equipment, is connected respectively with described gray processing treatment facility and described SD storer, for described gray level image, calculates the number of often row black picture element, and the row that the number of black picture element is more than or equal to described threshold number of pixels is designated as edge lines;
Skeleton splitting equipment, be connected respectively with described column border checkout equipment and described row rim detection equipment, region edge columns and edge lines interweaved is as mutual inductor skeleton domain of the existence, and from described gray level image, be partitioned into described mutual inductor skeleton domain of the existence to export as skeleton subimage, the background of skeleton subimage from gray level image to be separated;
Freescale IMX6 processor, is connected respectively with described skeleton splitting equipment and described SD storer, is mated by described skeleton subimage with various defect image feature, and the successful kind of output matching is as skeleton defect kind;
Display device, is connected with Freescale IMX6 processor, for showing skeleton defect kind in real time;
Bluetooth communication equipment, is connected with the electrical management server of Freescale IMX6 processor and far-end, for skeleton defect kind is sent to electrical management server place in real time by bluetooth communications link;
Wherein, Gauss's denoising equipment, smoothing processing equipment, gray processing treatment facility, column border checkout equipment, row rim detection equipment and skeleton splitting equipment are integrated on one piece of surface-mounted integrated circuit;
Wherein, described Bluetooth communication equipment comprises the first search subset, the second search subset and coupling connexon equipment; Wherein, the first search subset, according to the highest micro bluetooth network of MAC Address concentration determination Bluetooth MAC address concentration in Bluetooth Scatternet as target piconet, a Bluetooth Scatternet is made up of multiple micro bluetooth network; Second search subset, searches for subset be connected with described first, in described target piconet, finds, quantity preceding by signal intensity rank and is not more than one or more Bluetooth communication equipments of 7 as one or more target Bluetooth devices; Coupling connexon equipment, search for subset be connected with described second, startup is connected with the Bluetooth communication of described one or more target Bluetooth devices;
Wherein, when there being the quantity of Bluetooth communication equipment of signal for being more than or equal to 7 in described target piconet, the quantity of described one or more target Bluetooth devices is 7, when there being the quantity of Bluetooth communication equipment of signal for being less than 7 in described target piconet, the quantity of described one or more target Bluetooth devices is the quantity of the Bluetooth communication equipment having signal in described target piconet.
3. gas-filled type current transformer defect inspection device as claimed in claim 2, is characterized in that:
The resolution of high-definition camera equipment is 3840 × 2160.
4. gas-filled type current transformer defect inspection device as claimed in claim 2, is characterized in that:
High-definition camera equipment comprises cmos sensor, luminance sensor and secondary light source.
5. gas-filled type current transformer defect inspection device as claimed in claim 4, is characterized in that:
The light intensity of the ambient brightness determination secondary light source that high-definition camera equipment exports according to luminance sensor.
6. gas-filled type current transformer defect inspection device as claimed in claim 2, is characterized in that:
Silastic-layer adopts silicon rubber umbrella skirt structure, for combining closely with compound insulating sleeve.
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| CN201510784620.3A CN105466940A (en) | 2015-11-16 | 2015-11-16 | Inflatable current transformer defect monitoring device |
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| CN201610118455.2A Division CN105738370A (en) | 2015-11-16 | 2015-11-16 | Defect monitoring device for inflatable current transformer |
| CN201610118534.3A Division CN105738371A (en) | 2015-11-16 | 2015-11-16 | Defect monitoring device for inflatable current transformer |
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Application publication date: 20160406 |