JP2009118585A - Deterioration diagnosis device of power distribution equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deterioration diagnosis device of power distribution equipment, which provides effective maintenance information by determining replace time and estimating remaining life based on an appearance change of an apparatus of power distribution equipment. <P>SOLUTION: The device includes: an image analysis means 222 analyzing a state of the apparatus based on image data of an image obtained by a digital camera 1 photographing the apparatus of power distribution equipment, a replace determination means 223 determining whether the apparatus should be replaced based on a state of the apparatus, which is obtained by analysis of the image analysis means 222, and a remaining life estimating means 224 estimating a remaining life of the apparatus based on the state of the apparatus when the replace determination means 223 shows that the replacement is unnecessary. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a deterioration diagnosis device for a distribution facility, and more particularly, to a device for determining whether replacement is necessary and estimating a remaining life from a photograph of a device of the distribution facility.

  Conventionally, patrols or inspection patrols are performed at predetermined intervals for the maintenance of power distribution equipment. The deterioration of the equipment of the power distribution facility is determined, for example, by visually observing the state of the coating film on the equipment surface (presence / absence of rusting, size, color), and the equipment is replaced based on the judgment result. Note that the criteria for deterioration of rusting equipment (for example, transformers and switches) are based on the experience and subjectivity of individual workers.

In addition to this, as a deterioration diagnosis apparatus for diagnosing the deterioration state of a coating film of an apparatus, one using image processing is known. For example, the coating film surface is irradiated with light, and is generated on the coating film surface. The blister shadow pattern is photographed with a camera, the shadow pattern of the blister photographed is processed and analyzed, and numerical values are displayed to assist in the diagnosis of the deterioration of the coating film ( For example, see Patent Document 1). According to the deterioration diagnosis apparatus, by performing image processing on the coating film surface, the area ratio of the shadow pattern per unit area and the distribution of the individual sizes of the shadow pattern are obtained and displayed numerically. The worker can grasp the state of deterioration of the coating film only by judging whether or not the numerical value exceeds a predetermined numerical value.
Japanese Patent Laid-Open No. 2001-194383

  However, in such a conventional deterioration diagnosis device, the coating film surface is photographed, image processing is performed, and the analysis result of the image is displayed together with a numerical value serving as a criterion. Although it is possible to support the diagnosis of the condition, there has been a problem that consideration has not been given to, for example, the determination of the replacement time and the estimation of the remaining life years that will be a reference for future maintenance.

  Therefore, an object of the present invention is to provide effective maintenance information by determining the replacement time and estimating the remaining life based on the change in the appearance of the equipment of the distribution facility.

  1st invention of the degradation diagnosis apparatus of the power distribution equipment which solves the said subject was obtained by the analysis of the image analysis means which analyzes the state of the said equipment based on the image data of the equipment of a power distribution equipment, and the analysis of the said image analysis means A replacement determination unit that determines whether or not the device needs to be replaced based on the state of the device, and a remaining life that estimates the remaining life of the device based on the state of the device obtained by the analysis of the image analysis unit And an estimation means.

  In this invention, the state of the equipment of the power distribution facility is analyzed by the image analysis means, the necessity for replacement of the equipment is determined by the replacement determination means based on the state of the equipment, and the remaining life estimation means determines the equipment. The remaining life is estimated. Therefore, not only the deterioration state of the equipment is analyzed based on the change in the appearance of the equipment of the power distribution facility, but also the replacement time is determined and the remaining life years are estimated.

  According to a second aspect of the degradation diagnosis apparatus for power distribution equipment that solves the above problem, in addition to the specific matter of the first aspect, the replacement instruction information for the device is output based on the determination of the replacement determination means. A replacement instruction output unit is provided.

  In this invention, the replacement instruction | indication output means outputs the replacement instruction | indication of the equipment of a power distribution installation. Therefore, for example, not only the maintenance worker's replacement determination is supported, but also a clear replacement instruction is notified to the maintenance worker.

  According to a third aspect of the distribution facility deterioration diagnosis apparatus for solving the above problems, in addition to the specific matter of the first or second aspect, the remaining life information of the device is output based on the estimation of the remaining life estimation means. The apparatus has a remaining life output means.

  In the present invention, the remaining life information for each device is output based on the estimation by the remaining life estimating means. Therefore, even when the equipment of the power distribution facility is not required to be replaced, an efficient maintenance plan can be formulated based on the remaining life information for each equipment.

  In addition to the specific matter of any of the first to third inventions, the fourth invention of the degradation diagnosis device for power distribution equipment that solves the above problems is characterized in that the image analysis means includes a rusting area in a predetermined region of the device. And rust color are analyzed.

  In the present invention, the image analysis means analyzes the rusting area and the rust color in a predetermined region of the distribution facility equipment. Therefore, quantitative or qualitative analysis is performed as compared with the visual analysis of the maintenance worker. Moreover, by making the rusting area and rust color of the said equipment into analysis object, required image data can be acquired with simple means, such as a camera, for example.

  In addition to the specific matters of the fourth invention, the fifth invention of the degradation diagnosis device for power distribution equipment that solves the above-mentioned problems is characterized in that the replacement determination means includes the rust area and the rust color indicating the state of the device. Whether or not replacement is necessary is determined based on a comparison between the analysis data and replacement determination data indicating a replacement threshold with the rusting area and the rust color set in advance.

  In the present invention, whether or not replacement is necessary is determined based on a comparison between the analysis data of the rusting area and the rust color and the replacement determination data indicating the replacement threshold set in advance. Therefore, determination with less error is performed by replacement determination data as a unified determination criterion.

  In addition to the specific matter of the fourth or fifth invention, the sixth aspect of the distribution facility deterioration diagnosis apparatus that solves the above problems is characterized in that the remaining life estimation means includes the rusting area indicating the state of the device, and The remaining life of the device is estimated based on the tendency of the rust color analysis data to change over time.

  In the present invention, the remaining life of the device is estimated based on the rusting area indicating the state of the device and the tendency of rust color analysis data to change over time. Therefore, a highly reliable diagnosis that reflects the tendency of analysis data over time is performed.

  As described above, according to the present invention, the state of the device is analyzed based on the image data of the device of the distribution facility, the necessity of replacement of the device is determined based on the state of the device, and the remainder of the device is further determined. Since the lifetime is estimated, the replacement time can be determined and the remaining lifetime can be estimated based on the change in the appearance of the equipment of the distribution facility. Therefore, as a result, it is possible to provide maintenance information effective for efficient maintenance, including determination of the replacement time and estimation of the remaining life, for example, setting the frequency of inspection / inspection optimally Moreover, it can be changed as appropriate.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. 1-7 is a figure which shows one Embodiment of the degradation diagnosis apparatus of the power distribution equipment which concerns on this invention.

  In FIG. 1, a deterioration diagnosis device 2 includes a USB interface 21 that can be connected to the memory card 11 of the digital camera 1, a control unit 22 composed of, for example, a microcomputer, and an output unit 23 such as a printer or a liquid crystal display device. And an operation unit 24 such as a keyboard and a pointing device.

  The digital camera 1 is a still image digital camera using a solid-state image sensor, and takes in two-dimensional color digital image data at a time by electronic scanning. The digital camera 1 includes a removable memory card 11 and stores the captured two-dimensional color digital image data (hereinafter referred to as image data) in the memory card 11.

  Here, in this embodiment, for example, as shown in FIGS. 2A and 2B, power distribution equipment such as a transformer and a switch attached to a standard power pole 80 by a mounting band 82 is used. A device to be managed is shown, and the transformer 81 is shown as an example in FIG. A high voltage underline is connected to the transformer 81 via a high voltage cutout 84 attached to a high voltage cut support arm 83. In this case, it is easy to photograph the bottom surface of the transformer 81 from below the utility pole 80. On the other hand, as shown in FIGS. 3A, 3B, and 3C as an example of the state of the bottom surface of the transformer 81, rust R is generated on the bottom surface due to deterioration of the exterior of the transformer 81, and changes with time. As a result, the area of the rusting region gradually increases. In addition, due to deterioration of the exterior of the device, the color of the rusting region (rust color) also shows a certain tendency of change in color and shade (for example, change from red rust Rr to black rust Rb).

  Therefore, in the present embodiment, a case where the bottom surface of the transformer 81 is periodically photographed and deterioration diagnosis is performed using the area of the rusting region and the rust color as parameters will be described below as an example. That is, the maintenance worker periodically photographs the bottom surface of the transformer 81 of the distribution facility from the substantially uniform position and direction by using the digital camera 1, connects the memory card 11 to the USB interface 21, and degrades the image data. Enter in 2.

  In order to make the deterioration diagnosis based on the photograph (image) of the bottom surface of the transformer 81 as described above, the control unit 22 performs the image processing unit 221, the image analysis unit 222, the replacement determination unit 223, and the surplus. It includes a life estimation means 224, an analysis data storage means 225, and a diagnostic data storage means 226.

  The image processing unit 221 performs processing such as image quality improvement, image enhancement, and graphic (for example, bottom surface of the device) extraction based on the image data acquired from the memory card 11. Based on the image data processed by the image processing means 221, the image analysis means 222 extracts the rusting area on the bottom surface of the device, calculates the area, detects the rust color, and analyzes the analysis data including both information as analysis data The data is stored in the storage unit 225.

  As shown in FIG. 4, the analysis data storage means 225 stores, for example, inspection / inspection information such as identification information (ID), installation time, and installation location for each managed device. Here, the inspection / inspection information is updated (added) every time, and the inspection / inspection information includes, for example, a rusting area, a rust color index, and inspection / inspection time. The rusting area indicates the entire area of the rusting area. The rust color index is obtained by converting the shade and color of the rusting region into a numerical value corresponding to the degree of progress of deterioration. For example, the rust color index is set so that the value increases in the order of red, brown, and black. Furthermore, it is not limited to this embodiment, for example, instead of the rusting area described above, for example, the area ratio between the entire area of the bottom surface of the transformer 81 and the rusting area (or the area of the rusting area having the largest rust color index). You may ask for.

In the diagnostic data storage unit 226, as the diagnostic data (corresponding to the replacement determination data) used for the replacement determination of the transformer 81 by the replacement determination unit 223, the rusting area and the rust color index are transformed. Threshold values (p ₁ , q ₁ ) serving as criteria for determining whether or not the inspection / inspection frequency of the device 81 should be updated, and criteria for determining whether the transformer 81 should be replaced immediately (eg, within one month). Threshold values (p ₂ , q ₂ ), etc. are stored. The above-mentioned threshold is set in advance based on, for example, a rusting experiment on experimental equipment corresponding to the transformer 81 by an equipment manufacturer or a maintenance company, and is updated according to a change in the specification of the transformer 81 or the like. ing.

In the replacement determination unit 223, the transformer 81 requires immediate repair (replacement work) based on the diagnostic data stored in the diagnostic data storage unit 226 and the analysis data stored in the analysis data storage unit 225. It is determined whether it is a thing. For example, as shown in FIG. 5, in the graph in which the vertical axis represents the rusting area and the horizontal axis represents the rust color index, the rusting area is greater than p ₂ or the rust color is greater than q ₂ . Replacement is required (replacement area in the figure). Furthermore, the replacement determination unit 223 also determines whether to update the inspection / inspection frequency of the transformer 81 (for example, update from once every two years to once every year). For example, as shown in FIG. 5, rust-colored in p ₂ rust area from p ₁ is the case in the range of q ₁ of q ₂ to update the inspection and inspection frequency transformer 81 (increase) (in the figure, Patrol enhancement area).

  The remaining life estimation means 224 estimates the remaining life of the transformer 81 based on the tendency of the analysis data to change with time. In the analysis data storage means 225, the rusting area and the rust color index at each inspection / inspection are stored in time series as analysis data, and the analysis data is added at every inspection / inspection. Further, the remaining life of the transformer 81 can be estimated by analyzing the tendency of the rust color index over time. For example, as shown in FIG. 5, it is estimated that the rusting area and rust color index gradually increase from 3 points indicating inspection every 2 years from 2002 to 2006, and reach the replacement area within at least 2 years. Is done.

  With respect to the deterioration diagnosis device 2 configured as described above, a data accumulation process will be described with reference to FIG.

  First, when the memory card 11 is connected to the USB interface 21 and an image data input operation is performed from the operation unit 24 (step S101), the control unit 22 captures image data (step S102) and stores it in the image processing unit 221. Transfer control.

  Next, the image processing unit 221 performs, for example, the weather at the time of shooting, the improvement of the image quality according to the illumination, the enhancement of the image, the cropping of the image on the bottom surface of the transformer 81 so that the image data is uniform. Processing is performed (step S103), and control is transferred to the image analysis means 222.

  Next, the image analysis means 222 analyzes the image of the bottom surface of the transformer 81 (step S104). Here, the contour (outer edge) of the rusting region is extracted from the image data of the bottom surface of the transformer 81 based on a change in predetermined feature values (for example, shading, color, texture), and the area is calculated. Further, the rust color index of the highest concentration portion in the extracted rusting region is obtained. The initial value of the feature value, the distance from the digital camera 1 to the device, and the shooting direction are substantially uniform. When step S104 ends, control is transferred to the analysis data storage unit 225.

  Next, the analysis data storage unit 225 additionally updates the above-described analysis data (see FIG. 4) based on the value acquired by the image analysis unit 222 in step S104 (step S105).

Furthermore, the diagnosis process of the deterioration diagnosis apparatus 2 will be described with reference to FIG.
First, the control unit 22 determines whether or not the operation unit 24 is operated to input an instruction to start diagnosis processing, and identification information (ID) of a management target device to be diagnosed is specified (step S201). Here, when the ID of the management target device is specified, the control is transferred to the replacement determination unit 223, and when the ID of the management target device is not specified, the diagnosis process is terminated.

  For example, when the ID of the transformer 81 is specified, the replacement determination unit 223 reads the analysis data corresponding to the specified ID from the analysis data storage unit 225 (step S203), and further from the diagnostic data storage unit 226, The diagnostic data is read (step S204), and it is determined whether or not the designated transformer 81 is immediately replaced (whether the rusting area and the rust color are in the replacement area) based on the comparison between the two. (Step S205). If it is determined that the replacement is to be performed immediately, for example, the output unit 23 is caused to output an instruction to repair the designated transformer 81 within one month (step S206).

  If it is determined in step S205 that the designated transformer 81 cannot be replaced immediately, the control is transferred to the remaining life estimation means 224.

  The remaining life estimation means 224 estimates the remaining life based on the tendency of the analysis data read in step S203 to change over time (step S207).

  Next, the remaining life estimation means 224 determines whether or not the remaining life of the specified transformer 81 is within one year as a result of the above-mentioned remaining life estimation (step S208). Here, when it is determined that the remaining life is within one year, the remaining life estimation means 224 causes the output unit 23 to output, for example, an instruction to repair the designated transformer 81 within one year (step S209).

  If it is determined in step S208 that the remaining life is not within one year, the remaining life estimating means 224 causes the output unit 23 to output the remaining life years as maintenance information (step S210). Here, based on the determination of whether to increase the inspection / inspection frequency by the replacement determination means 223 (whether the rusting area and the rust color are in the inspection enhancement region), the inspection frequency is enhanced (next inspection). A timing advance) instruction may be output, or may be output as other considerations during patrol.

  As described above, in this embodiment, the state of the management target device such as the transformer 81 of the distribution facility is analyzed by the image analysis unit 222, and the replacement determination unit is based on the state of the management target device such as the transformer 81. In 223, it is determined whether or not the managed device such as the transformer 81 needs to be replaced. If replacement is necessary, a message to that effect is output. When replacement is not necessary, the replacement determination unit 223 further determines whether or not the inspection / inspection frequency needs to be updated, and the remaining life estimation unit 224 estimates the remaining life of the managed device such as the transformer 81. And output by the output unit 23. Therefore, effective maintenance information including the frequency of inspection / inspection can be provided, and the maintenance operator can receive a clear replacement instruction.

  In the present embodiment, the image analysis means 222 analyzes the rusting area and the rust color on the bottom surface of the transformer 81, so that the maintenance worker can use simple means such as the digital camera 1 during inspection and inspection. Necessary image data can be acquired.

  As another aspect of the present embodiment, the control unit 22 is provided with means for creating a list of devices requiring repair for each year based on the analysis data periodically stored in the analysis data storage means. In response to the operation of the unit 24, the output unit 23 may output a list of devices requiring modification. In this manner, the output unit 23 outputs a list of the times of the devices that need replacement in addition to the individual remaining life information of the controlled devices such as the transformer 81, so that the maintenance worker can use the list based on the list. As a result, it is possible to grasp the number and location of refurbished equipment for each fiscal year, and to formulate a maintenance plan that includes the frequency of inspection and inspection according to the actual situation.

  Further, as another aspect of the present embodiment, the control unit 22 is in a region where deterioration due to rust is remarkable based on analysis data periodically accumulated in the analysis data storage means (for example, from the installation time to replacement). Means may be provided for extracting a period of time (or number of inspections) that is equal to or less than a predetermined value) and causing the output unit 23 to output information on the district in response to an operation of the operation unit 24. As described above, since the output unit 23 outputs the information on the slowness of deterioration for each installation area of the equipment, in addition to the individual remaining life information of the managed control equipment such as the transformer 81, the maintenance worker includes the information in the information. Based on this, it is possible to formulate a maintenance plan that includes the frequency of efficient inspections and inspections that take into account regional characteristics.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea. For example, it can be applied to maintenance of equipment such as a power plant, a substation, and an unmanned lighthouse.

  In the present embodiment, a degradation diagnosis apparatus is described in which a photograph of a device to be managed is taken with a digital camera, and image data of the photograph is obtained from a memory card. It goes without saying that the picture may be taken with a built-in camera, and the image data may be acquired via a communication network such as a wireless / wired telephone communication network and the Internet.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the degradation diagnosis apparatus of the power distribution equipment which concerns on this invention, and is a block diagram which shows the schematic whole structure. It is a figure which shows the power distribution equipment of the diagnostic object, (a) is the side view, (b) is the bottom view. It is a bottom view of the equipment of the distribution equipment of the diagnostic object. It is a list of analysis data used for the diagnosis. It is a graph which shows the relationship of the parameter used for the diagnosis. It is the flowchart of the data storage process. It is a flowchart of the diagnostic process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Digital camera 2 ... Deterioration diagnostic apparatus 11 ... Memory card 21 ... USB interface (I / F) 22 ... Control part 23 ... Output part (replacement instruction output means, surplus (Life output means) 24 ··· operation unit 221 ··· image processing means 222 ··· image analysis means 223 ··· replacement determination means 224 ··· remaining life estimation means 225 ··· analysis data storage means 226 · ..Data storage means for diagnosis

Claims (6)

Image analysis means for analyzing the state of the device based on the image data of the device of the distribution facility;
A replacement determination unit that determines whether or not to replace the device based on the state of the device obtained by the analysis of the image analysis unit;
A remaining life estimation means for estimating the remaining life of the device based on the state of the device obtained by the analysis of the image analysis means;
A deterioration diagnosis device for power distribution equipment, comprising:   2. The deterioration diagnosis device for a distribution facility according to claim 1, further comprising a replacement instruction output unit that outputs replacement instruction information of the device based on the determination of the replacement determination unit.   The distribution facility deterioration diagnosis apparatus according to claim 1, further comprising a remaining life output unit configured to output the remaining life information of the device based on the estimation of the remaining life estimation unit.   4. The deterioration diagnosis device for power distribution equipment according to claim 1, wherein the image analysis unit analyzes a rusting area and a rust color in a predetermined region of the device. 5.   The replacement determination means includes the analysis data of the rusting area and the rust color indicating the state of the device, and replacement determination data indicating a replacement threshold value with the rusting area and the rust color set in advance. The deterioration diagnosis device for power distribution equipment according to claim 4, wherein the necessity of replacement is determined based on the comparison.   The said remaining life estimation means estimates the remaining life of the said apparatus based on the tendency of the said rusting area which shows the state of the said apparatus, and the time-dependent change of the analysis data of the said rust color. 5. A deterioration diagnosis device for power distribution equipment according to 5.

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