JP2008091209A - Insulator leakage current observation method, device, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to automatically store only monitoring image data of a certain period necessary for analysis or the like of a monitoring object in the case of a prescribed phenomenon generated in the monitoring object, while continuously carrying out always and for a long period without interruption acquisition of the monitoring image data by observing the monitoring object using an imaging means. <P>SOLUTION: Using a current measuring means, leakage current of an insulator is measured and using an imaging means, monitoring image of the insulator is obtained and it is judged whether the data of the monitoring image obtained by one set out of a plurality of image storing means is stored or not based on the size of the leakage current. When it is judged that it is not stored, the other set out of the plurality of image storing means obtains monitoring image data while it is being deleted, and acquisition and deletion of the monitoring image data are carried out alternately by a plurality of image storing means according to a taking-in time band established beforehand. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an insulator leakage current observation method, apparatus, and program. More specifically, the present invention relates to an insulator leakage current observation method, apparatus, and program suitable for use in creating data provided to an apparatus for estimating insulator leakage current using image data of an ultraviolet camera.

  In this specification, the insulator leakage current is used to mean a leakage current generated on the surface of an insulator that is made of an electrically insulating material and supports an electric wire.

  Due to demands for extending the life of existing power facilities and improving the efficiency of facility use, the maintenance management methods for power facilities are conventional post-processing management (also called CM) and periodic replacement management (Time Based). From this, it is predicted that the management will be directed to state-based management (also referred to as CBM). For this purpose, establishment of a technique for constantly monitoring the state of equipment is desired. However, a technique for constantly monitoring insulators has not been established.

  The monitoring items for the insulator include monitoring the degree of contamination of the insulator surface and the amount of salt attached mainly due to salt damage. When the contaminated material adheres to the insulator surface and the insulator surface becomes wet due to, for example, rainfall, a conductive path is formed by the electrolyte (mainly NaCl) contained in the contaminated material, causing discharge, which is originally an electrical insulator. Leakage current may occur on the surface. When such discharge or leakage current occurs, the insulator may be damaged or deteriorated by Joule heat, electrochemical action, or the like. In particular, polymer insulators that use polymer insulation materials such as silicone rubber as the outer skin are expected to expand in the future in the field of power transportation because they are lighter, stronger, and have better insulation performance than conventional porcelain insulators. On the other hand, since it is an organic material, there is concern about erosion degradation due to the occurrence of discharge and leakage current.

  Therefore, as a device for estimating the insulator leakage current, the correlation between the area of the portion emitting light by the discharge on the insulator surface and the value of the leakage current flowing through the insulator surface at the time of light emission is utilized. Imaging means for acquiring a monitoring image of a specimen made of the same material as the insulator, light emission area calculating means for obtaining an area of a portion emitting light from the monitoring image obtained by the imaging means, leakage current value and light emission area There has been proposed an apparatus comprising estimation means for estimating a leakage current value flowing through a surface of a test specimen from a light emission area obtained by a light emission area calculation means based on the correlation between the two (Patent Document 1).

  In order to estimate the insulator leakage current using the apparatus of Patent Document 1, the area of the light emitting portion in the monitoring image when the insulator surface emits light by discharge and the insulator leakage current value measured by the leakage current measuring circuit Combination data is required, and a large number of combination data is required to accurately estimate the insulator leakage current. And, in order to prepare a large number of combination data of the monitoring image data and the insulator leakage current value at the time of the insulator surface light emission, the monitoring of the insulator is always performed over a long period of time using the imaging means, and at least the insulator surface. It is necessary to save monitoring image data at the time of light emission.

  However, if monitoring image data is always acquired over a long period of time and recording is continued on the recording medium, the recording medium will eventually become full because the capacity of the recording medium is limited. If the recording medium is full, replace it with a new recording medium, or copy the monitoring image data recorded on the recording medium to another recording medium or device to use the same recording medium again, and then erase it. Work is required, and recording must be interrupted each time. Then, by interrupting the recording, there arises a problem that data in a required situation is lost.

  Therefore, as a conventional method that always performs monitoring of monitoring targets and recording of monitoring image data without interruption, when the recording medium for recording monitoring image data is full, the oldest image data is updated. There is a so-called circular recording method in which the image data is automatically overwritten sequentially and the monitoring image data is continuously recorded.

  However, for example, even if it is desired to store monitoring image data when an abnormality occurs in the monitoring target for a long period of time from the viewpoint of data collection in various situations and data utilization in the future, in the circular recording method, the old image Since the latest image data is unconditionally overwritten on the data, there is a problem that no old image data remains. Taking the collection of data used in the insulator leakage current estimation apparatus of Patent Document 1 as an example, the latest image data is overwritten on the old image data, so that the monitoring image data at the time of surface light emission occurring irregularly There arises a problem that the combination data with the insulator leakage current value is not accumulated.

  Therefore, as a conventional method that enables long-term storage of necessary data in spite of the circular recording method, the video data acquired from the imaging unit is recorded in the first recording device of the circular recording method, and the first recording device The video data recorded in the video is searched according to a predetermined search condition, the searched video data is displayed as a list of information associated with the video data, and the video data selected from the list is displayed from the first recording device. There is a method of storing video data that is read and stored in a second recording device (Patent Document 2). In this video data saving method, video data recorded on the first recording device is played back, and the video data that the operator wants to save by operating the in-point designation button while watching the video data played back on the monitor. Specifying the storage section of the video data to be read from the first recording device and stored in the second recording device by specifying the beginning of the video data and operating the out point specification button to specify the end of the video data to be stored I have to.

JP 2006-12799 A JP 2004-173259 A

  However, in the video data storage method disclosed in Patent Document 2, in order to specify the storage period of video data to be stored in the second recording device, the operator selects all of the video data recorded in the first recording device. Must see. For this reason, it is hard to say that video data to be stored for a long period of time can be efficiently selected and stored from the recorded long-time video data.

  Therefore, according to the present invention, a predetermined phenomenon occurs in the monitoring target while monitoring the monitoring target using the imaging unit and continuously performing monitoring image data acquisition without interruption. In this case, it is an object of the present invention to provide a leakage current observation method, apparatus, and program capable of automatically storing only monitoring image data for a certain period required for analysis of a monitoring target.

  In order to achieve this object, the method for observing an insulator leakage current according to claim 1 measures the leakage current of the insulator using the current measuring means, acquires the monitoring image of the insulator using the imaging means, and stores a plurality of images. It is determined whether or not to save the monitoring image data captured by one of the means based on the magnitude of the leakage current, and when it is determined not to save, the data of the plurality of image saving means is deleted The other one captures the monitoring image data, and capture and deletion of the monitoring image data are alternately performed by a plurality of image storage means according to a preset capturing time zone.

  According to a second aspect of the present invention, there is provided an insulator leakage current observation apparatus comprising: current measuring means for measuring an insulator leakage current; imaging means for acquiring an insulator monitoring image; and monitoring image data according to a preset capture time zone. And a plurality of image storage means for erasing when it is determined that the monitoring image data is to be stored based on the magnitude of the leakage current and is determined not to be stored.

  The insulator leakage current observation program according to claim 3 is connected to an image pickup means for acquiring a monitoring image of the insulator and to be able to take in the monitoring image data, while being able to access a database in which the data of the leakage current of the insulator is recorded. Based on the magnitude of the leakage current, the processing for capturing the monitoring image data from the imaging means at least in accordance with a preset capturing time zone, the processing for reading the leakage current data during monitoring image data acquisition from the database, and A process for determining whether to save the monitoring image data and a process for erasing the monitoring image data when it is determined not to save the monitoring image data are performed.

  Therefore, according to this insulator leakage current observation method, apparatus, and program, it is possible to determine whether or not it is necessary to capture the monitoring image data of the insulator (hereinafter also simply referred to as monitoring image data) and to store the captured monitoring image data. Since it is possible to perform erasure in the case of determination alternately by providing a time difference between a plurality of image storage means according to a preset capture time zone, acquisition of monitoring image data is always performed without interruption. Further, since it is automatically determined whether or not the monitoring image data needs to be stored based on the magnitude of the leakage current of the insulator, only data useful for the analysis of the insulator leakage current is automatically stored.

  According to a fourth aspect of the present invention, in the insulator leakage current observation method according to the first aspect, the capture time zone is controlled based on the time provided by the NTP server.

  According to a fifth aspect of the present invention, in the insulator leakage current observation apparatus according to the second aspect, the capture time zone is controlled based on the time provided by the NTP server.

  According to a sixth aspect of the present invention, in the insulator leakage current observation program according to the third aspect, the capture time zone is controlled based on the time provided by the NTP server.

  Therefore, in the case of this insulator leakage current observation method, apparatus, and program, a plurality of image storage means or computers control the start and end of capturing of monitor image data based on the time provided by the NTP server. Therefore, there is no deviation in the timing at which the device for capturing the monitoring image data is switched, and the monitoring image data with no omission is collected more reliably.

  According to the insulator leakage current observation method, apparatus, and program of the present invention, it is possible to always perform acquisition of monitoring image data without interruption, and to prevent missing observation data.

  In addition, according to the present invention, it is possible to store only data useful for the analysis of the insulator leakage current, and it is possible to greatly extend the period until the recording medium is full, which extends over a long period of time. Monitoring image data can be collected. In addition, it is possible to automatically save only the data useful for the analysis of the insulator leakage current, and save the trouble of selecting the data to be saved for a long time from the long-time monitoring image data. Selection and collection can be made more efficient.

  Further, according to the present invention, it is possible to match the processing timings of the respective image storage means, and it is possible to more reliably prevent the monitoring image data from being lost by matching the switching timings of the devices that capture the monitoring image data. I can plan.

  Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.

  FIG. 1 to FIG. 3 show an example of an embodiment of an insulator leakage current observation method and apparatus according to the present invention. In this insulator leakage current observation method, the insulator leakage current is measured using the current measuring means 3 and the monitoring image of the insulator is acquired using the imaging means 5, and one of the two image storage means 10A and 10B is acquired. It is determined whether to save the monitoring image data captured by the stand based on the magnitude of the leakage current, and when it is judged not to save, the other of the two image saving means 10A and 10B is deleted. One unit captures the monitoring image data, and the capturing and erasing of the monitoring image data are alternately performed by the two image storage units 10A and 10B in accordance with a preset capturing time zone.

  The above insulator leakage current observation method is implemented as an insulator leakage current observation apparatus of the present invention. The insulator leakage current observation apparatus 1 according to the present embodiment includes a current measuring unit 3 that measures the leakage current of the insulator, an imaging unit 5 that acquires a monitoring image of the insulator, and monitoring image data according to a preset capture time zone. The first image storage unit 10A and the second image storage unit that are erased when it is determined that the monitoring image data is to be stored based on the magnitude of the leakage current and whether the monitoring image data is stored or not is determined. 10B.

  The current measuring means 3 is attached to the surface of the insulator and measures the leakage current generated by the discharge on the insulator surface. Specifically, for example, a current measurement sensor including a current detection circuit is used.

  In the present embodiment, a data server 4 that accumulates and stores the data of the insulator leakage current is used. The current measuring unit 3 and the data server 4 are connected by a communication line or the like, and leakage current value data is transmitted / received through the communication line or the like as measured by the current measuring unit 3. The leakage current value data measured by the current measuring means 3 and the data at the time when the insulation leakage current is measured are accumulated, and the leakage current database 18 is constructed in the data server 4.

  The first image storage means 10A and the second image storage means 10B and the data server 4 are connected by a communication line 8, and transmission / reception (input / output) of signals such as data and control commands to each other via the communication line 8. ) Is performed.

  The imaging means 5 acquires grayscale or color digital image data having brightness values of a plurality of gradations of each pixel constituting the image, that is, luminance value data.

  Here, as elements of light emission by discharge on the insulator surface, light emission by flame reaction of sodium (Na) contained in the insulator on the insulator surface and light emission when nitrogen (N) in the air is ionized are two. There is one. In the light emission by the flame reaction of sodium, light having a wavelength of about 600 nm (more precisely, about 589 nm) is emitted. In the light emission when nitrogen is ionized, ultraviolet light (wavelength is 1 nm to 400 nm) is emitted.

  Therefore, the conventional apparatus for estimating the insulator leakage current captures the image of at least one or both of the light emission caused by the flame reaction of sodium during discharge and the light emission when nitrogen is ionized. Measure the emission area and the leakage current value that flowed through the insulator surface during discharge to obtain a correlation between the emission area and the leakage current value in advance, and discharge under the conditions that can be considered to be the same or almost the same as this imaging condition. The light emission at the time is captured in the image, and the light emission area in this image is obtained, and the corresponding leakage current value is estimated based on the correlation obtained in advance.

  In the present embodiment, the imaging unit 5 can detect an existing or new ultraviolet detection camera having a high sensitivity to the wavelength of ultraviolet light (specifically, 1 nm to 400 nm), or visible light and ultraviolet light. An existing or new CCD camera or the like that includes an imaging device such as a CCD (abbreviation of Charge-Coupled Device) and that can shoot from visible light to ultraviolet light by omitting filter processing for removing ultraviolet light is used.

  When using an ultraviolet camera with a high sensitivity to the wavelength of ultraviolet light, it is possible to capture the ultraviolet light emitted when nitrogen in the air is ionized during discharge with high sensitivity. Even if the discharge light generated on the surface of the insulator is not buried in the background, the image can be taken well. In addition, when an ultraviolet camera capable of photographing from visible light to ultraviolet light is used, it is possible to capture both light emitted by flame reaction of sodium during discharge and light emitted when nitrogen in the air is ionized. .

  Discharge contains both visible light (sodium light emission) and ultraviolet light components, but there are cases where sufficient information cannot be obtained with only the visible light emission area, so information on both ultraviolet light and visible light is obtained. In this case, it is preferable to use an ultraviolet camera because a general ultraviolet camera can acquire visible light information unless a special filter is used.

  The insulator leakage current observation device 1 of this embodiment is configured to transmit the monitoring image data acquired by the imaging means 5 through the data transmission cable 9 via the video signal compensator 2. For example, an optical fiber is used as the data transmission cable 9 in order to increase the data transmission speed when the transmission distance of the monitoring image data is long or to prevent noise inflow due to the influence of a large electric field nearby. In this case, an electric / optical signal converter may be used instead of the video signal compensator.

  Furthermore, the insulator leakage current observation device 1 of the present embodiment distributes monitoring image data acquired by the imaging unit 5 to the first image storage unit 10A and the second image storage unit 10B for transmission. An image data distributor 6 is provided. The monitoring image data distributor 6 distributes and outputs the monitoring image data input from the imaging unit 5 to either the first image storage unit 10A or the second image storage unit 10B through the data transmission cable 9. is there.

  Note that the first image storage unit 10A and the second image storage unit 10B are connected to the data transmission cable 9 and input terminals for capturing the monitoring image data acquired by the imaging unit 5 via the monitoring image data distributor 6. 16. Specifically, the input terminal 16 is, for example, USB (abbreviation for Universal Serial Bus), SCSI (abbreviation for Small Computer System Interface), IEEE (abbreviation for Institute of Electrical and Electrical Engineers) 1394, or the like.

  Further, in the present embodiment, an NTP (abbreviation of Network Time Protocol) server 7 is connected to the communication line 8, and the time is transmitted to the first image storage unit 10A and the second image storage unit 10B via the communication line 8. Data is provided. In addition, time data is also provided to the data server 4 via the communication line 8, and when the leakage current value data measured by the current measuring means 3 is accumulated in the leakage current database 18, the insulator leakage is performed. The time data stored together as the data of the time when the current was measured is also based on the time data provided from the NTP server 7. Thereby, the time of 10 A of 1st image storage means, the 2nd image storage means 10B, and the data server 4 is synchronized.

The processing of the insulator leakage current observation apparatus 1 is executed according to the steps shown in the flowchart of FIG. That is,
First, the step (W1) of starting the measurement of the leakage current of the insulator using the current measuring means 3 and starting the acquisition of the monitoring image of the insulator using the imaging means 5 is executed.

  Then, as the processing turn (T1) of the first image storage means 10A, the monitoring image data started acquisition in step W1 and the recording start (T1-S1) and the monitoring started in step T1-S1 are started. Step (T1-S2) for ending capturing and recording of image data, step (T1-S3) for reading leakage current value data at the start of measurement at step W1, and leakage current for reading at step T1-S3 A step (T1-S4) for determining whether or not to store the monitoring image data recorded between steps T1-S1 and T1-S2 as it is based on the magnitude of the value, and the monitoring image data in steps T1-S4 When it is determined not to save the image (T1-S4; No), the monitoring image recorded between steps T1-S1 and T1-S2 And step (T1-S5) for erasing the data, step (T1-S6) for determining whether or not to end the observation of insulators leakage current and is executed.

  Further, as the processing turn (T2) of the second image storage unit 10B, the step W1 is performed simultaneously with the step (T1-S2) of ending the capturing and recording of the monitoring image data in the processing turn T1 of the first image storage unit 10A. Step (T2-S1) for capturing and recording the monitoring image data started to be acquired in step S2 is executed, and then the step (T2-T1) for terminating the capturing and recording of the monitoring image data started in step T2-S1. S2), reading the leakage current value data after starting measurement in step W1 (T2-S3), and reading from step T2-S3 based on the magnitude of the leakage current value from steps T2-S1 to T2- A step (T2-S4) of determining whether or not to store the monitoring image data recorded until S2 as it is; In step T2-S4, when it is determined that the monitoring image data is not stored (T2-S4; No), the monitoring image data recorded between steps T2-S1 and T2-S2 is deleted (T2-S5). Then, a step (T2-S6) for determining whether or not to end the observation of the leakage current is executed.

  Then, as the processing turn (T3) of the first image storage means 10A, the step of completing the capturing and recording of the monitoring image data in the processing turn T2 of the second image storage means 10B (T2-S2) and the step A step (T3-S1) of capturing and starting the recording of monitoring image data started acquisition at W1 is executed, and then steps T1-S2 to T1- in the previous processing turn T1 of the first image storage means 10A are executed. Similar to the processing up to S6, the processing from Step T3-S2 to T3-S6 is executed.

  Thereafter, similarly, until it is determined in step S6 (T1-S6, T2-S6, T3-S6,...) That the processing is completed (S6; Yes), the monitoring image data is taken in by one of the image storage units. Simultaneously with the end of the recording, the capturing and recording of the monitoring image data of the other image storing means is started, and the capturing and recording of the monitoring image data by the two image storing means are alternately repeated without interruption.

  The above-described insulator leakage current observation method and insulator leakage current observation apparatus are also realized by executing an insulator leakage current observation program on a computer. In the present embodiment, a case where the insulator leakage current observation program is executed on a computer will be described as an example.

  The configuration of the first image storage means 10A and the second image storage means 10B constructed using a computer is shown in FIG. 2 together with the overall configuration of the insulator leakage current observation apparatus 1 for executing the insulator leakage current observation program 17. As shown in FIG. Hereinafter, the first image storage unit 10A and the second image storage unit 10B are also simply referred to as the image storage unit 10.

  The image storage means 10 includes a control unit 11, a storage unit 12, an input unit 13, a display unit 14, and a memory 15, which are connected to each other by a signal line such as a bus. The control unit 11 performs calculation related to the control of the entire image storage means 10 and the observation of the insulator leakage current by the insulator leakage current observation program 17 stored in the storage unit 12, for example, CPU (abbreviation of Central Processing Unit). It is. The storage unit 12 is a device that can store at least data and programs, and is, for example, a hard disk. The input unit 13 is an interface for giving at least an operator command to the CPU, and is, for example, a keyboard. The display unit 14 displays characters, graphics, and the like under the control of the control unit 11 and is, for example, a display. The memory 15 becomes a memory space that is a work area when the control unit 11 executes various controls and calculations.

  The control unit 11 of the image storage means 10 executes the insulator leakage current observation program 17 to acquire time data from the NTP server 7 and start and end of capturing monitor image data based on the acquired time data. A monitoring time data recording unit 11b for capturing monitoring image data from the imaging means 5 via the monitoring image data distributor 6 and recording the captured monitoring image data in the storage unit 12; A data storage necessity determination unit 11c that reads leakage current value data from the leakage current database 18 and determines whether monitoring image data needs to be saved based on the read leakage current magnitude, and data saving necessity Recorded in the storage unit 12 when the determination unit 11c determines that it is not necessary to save the monitoring image data Monitoring the image data deletion section 11d for erasing image data viewing is constructed.

  Further, in the storage unit 12, a monitoring image database 19 is created that records the captured monitoring image data and stores and accumulates the monitoring image data as it is when it is determined that the recorded monitoring image data needs to be stored. The

  In carrying out the present invention using the insulator leakage current observation program 17, first, the measurement of the insulator leakage current by the current measuring means 3 is started and the acquisition of the monitoring image by the imaging means 5 is started (W1). Further, the insulator leakage current observation program 17 is activated in the first image storage unit 10A and the second image storage unit 10B.

  Simultaneously with the activation of the insulator leakage current observation program 17, the processing time control unit 11 a of the control unit 11 of the image storage unit 10 starts acquiring time data from the NTP server 7, and each image based on the acquired time data. It is determined whether the storage unit 10 is in the monitoring image data capture time zone. Here, the capture time zone refers to a time zone during which the image storage means 10 captures and records monitoring image data.

  When the processing time control unit 11a determines that it corresponds to the capture time zone based on the time data acquired from the NTP server 7, it gives a command to capture and record the monitoring image data to the monitoring image data recording unit 11b. When it is determined that it does not fall within the capture time zone, the acquisition of time data is continued without outputting the processing command to the outside.

  Here, according to the present invention, monitoring image data acquisition and recording are alternately performed by a plurality of image storage means, thereby continuously collecting monitoring image data without interruption. In the present embodiment, the first image storage unit 10A and the second image storage unit 10B alternately capture and record monitoring image data.

  The monitoring image data capture time zone may be set in advance on the insulator leakage current observation program 17 or may be specified by the operator after the insulator leakage current observation program 17 is activated. . When setting the acquisition time zone after starting the insulator leakage current observation program 17, the processing time control unit 11a of the control unit 11 displays a message on the display unit 14 requesting the specification of the acquisition time zone, and input The operator's designated time zone input via the unit 13 is used.

  If the acquisition time zone is defined in advance on the insulator leakage current observation program 17, the processing time control unit 11a stores the time zone read from the program 17 in the memory 15, and after the insulator leakage current observation program 17 is started. When the operator designates, the processing time control unit 11 a stores the designated time zone of the worker input via the input unit 13 in the memory 15.

  In the monitoring image data capture time zone, the plurality of image storage means constituting the insulator leakage current observation apparatus 1 alternately and continuously capture and record so that the capture and recording of the monitor image data are not interrupted. Set to do. In the present embodiment, the first image storage means 10A is set to capture and record the monitoring image data in the even number level, and the second image storage means 10B captures and records the monitoring image data in the odd number level. Is set to do. The even minute range means, for example, from 2:00 to 3:00 and from 4:00 to 5:00. The odd minute range means, for example, from 1 minute 00 to 2 minutes 00 seconds or from 3 minutes 00 seconds to 4 minutes 00 seconds. Also, every minute of 00 minutes is treated as an even number.

  In the present embodiment, after the start of the observation of the insulator leakage current, when the processing time control unit 11a of the control unit 11 initially acquires from the NTP server 7 is an even number of minutes, that is, the monitoring image by the first image storage unit 10A. A case where data acquisition and recording processing starts will be described.

  First, the process (T1) of the first image storage unit 10A will be described. In the following description, the processing of the means constituting the first image storage means 10A will be described unless otherwise specified.

  The processing time control unit 11 a of the control unit 11 reads the setting of the capture time zone stored in the memory 15. In the present embodiment, the processing time control unit 11a reads that it is an even number of levels as the setting of the capture time zone of the first image storage unit 10A.

  Since the processing time control unit 11a initially acquires from the NTP server 7 is an even number of minutes, the processing time control unit 11a instructs the monitoring image data recording unit 11b to start capturing and recording the monitoring image data. give. Based on this command, the monitoring image data recording unit 11b captures the monitoring image data from the imaging means 5 via the monitoring image data distributor 6 and records the captured monitoring image data in the monitoring image database 19 of the storage unit 12 (T1). -S1). The processing time control unit 11a continuously acquires time data.

  Then, when the time acquired by the processing time control unit 11a from the NTP server 7 ends in the even number range and enters the odd number range, the processing time control unit 11a issues a command to end the capture and recording of the monitoring image data. This is given to the monitoring image data recording unit 11b. The monitoring image data recording unit 11b finishes capturing and recording the monitoring image data based on this command (T1-S2). Hereinafter, a time zone in which the monitoring image data recording unit 11b captures and records monitoring image data in the processing turn (that is, T1), that is, a time zone from T1-S1 to T1-S2 is referred to as a T1 time zone. The monitoring image data recorded in the monitoring image database 19 in the T1 time zone is referred to as T1 time zone monitoring image data.

  Next, the data storage necessity determination unit 11c reads the T1 time zone insulator leakage current value data from the leakage current database 18 in the data server 4 and stores it in the memory 15 as T1 time zone leakage current value data (T1). -S3).

  Subsequently, the data storage necessity determination unit 11c specifies the maximum value (hereinafter referred to as the T1 time zone maximum value) in the T1 time zone leakage current value data stored in the memory 15. Then, the data storage necessity determination unit 11c compares the T1 time zone maximum value with a threshold value for determining whether the monitoring image data needs to be stored (hereinafter referred to as a data storage necessity threshold value). Then, it is determined whether or not it is necessary to save the T1 time zone monitoring image data recorded in the monitoring image database 19 of the storage unit 12 (T1-S4).

  The data storage necessity threshold is an index related to the magnitude of the leakage current on the surface of the insulator. If the insulator leakage current value in the monitoring image data capturing time zone is larger than this threshold, the monitoring of the capturing time zone is performed. The image data is an index for determining that it is necessary to save the image data. The size of the data storage necessity threshold is not particularly limited, and the operator considers the actual leakage current in the insulator to be observed and the leakage current that can lead to damage or deterioration of the insulator. An appropriate value may be set. In the present embodiment, the leakage current magnitude is 5 mA as the data storage necessity threshold.

  The data storage necessity threshold value may be defined in advance on the insulator leakage current observation program 17, or may be specified by the operator after the insulator leakage current observation program 17 is started. In the case where the data storage necessity threshold is set after the insulator leakage current observation program 17 is started, a message indicating that the data storage necessity judgment unit 11c of the control unit 11 requests the specification of the data storage necessity threshold is displayed on the display unit 14. The operator's designated value that is displayed and input via the input unit 13 is used.

  When the data storage necessity threshold value is defined in advance in the insulator leakage current observation program 17, the value read from the program 17 by the data preservation necessity determination unit 11c is stored in the memory 15, and the insulator leakage current observation program 17 is stored. When the operator designates after activation, the data storage necessity determination unit 11 c stores the value designated by the worker input via the input unit 13 in the memory 15.

  The data storage necessity determination unit 11c reads the data storage necessity threshold value from the memory 15, and determines that the T1 time zone maximum value is equal to or less than the data storage necessity threshold value and it is not necessary to save the T1 time zone monitoring image data. In this case (T1-S4; No), a command to erase the T1 time zone monitoring image data recorded in the monitoring image database 19 is given to the monitoring image data erasure unit 11d. The monitoring image data erasure unit 11d erases the T1 time zone monitoring image data based on this command (T1-S5).

  On the other hand, when it is determined that the T1 time zone maximum value is larger than the data storage necessity threshold value and it is necessary to save the T1 time zone monitoring image data (T1-S4; Yes), the data storage necessity judgment unit 11c The T1 time zone leakage current value data stored in the memory 15 in step T1-S3 is read, and this T1 time zone leakage current value data is written in the monitoring image database 19 as leakage current value data corresponding to the T1 time zone monitoring image data. .

  Step T1-S4; Following the processing in the case of Yes or the processing in Step T1-S5, the control unit 11 determines whether or not to stop the observation of the insulator leakage current (T1-S6).

  The setting of the observation end of the insulator leakage current may be set in advance on the insulator leakage current observation program 17 as the observation end time, or may be designated by the operator in a timely manner after starting the insulator leakage current observation program 17. Anyway. Further, the observation end time may be defined in advance on the insulator leakage current observation program 17, and the operator may be able to specify it in a timely manner after starting the program. In the case where the end of observation is set in a timely manner after the insulator leakage current observation program 17 is activated, the observation end command input via the input unit 13 when the operator determines that the time is appropriate for the end of the observation is the control unit 11. To be given to.

  When the observation end time is preliminarily specified on the insulator leakage current observation program 17, the control unit 11 stores the time read from the program 17 in the memory 15, and the operator ends the observation after the insulator leakage current observation program 17 is started. Is designated, the control unit 11 causes the memory 15 to store the operator's observation end command input via the input unit 13.

  When the observation end time stored in the memory 15 is reached, or when an observation end instruction is stored in the memory 15 (T1-S6; Yes), the control unit of the first image storage unit 10A. 11 finishes the processing of the processing turn T1 and ends the observation of the leakage current (END).

  On the other hand, if the observation end time stored in the memory 15 is not reached, or if no observation end instruction is stored in the memory 15 (T1-S6; No), the first image storage means 10A The control unit 11 ends the processing of the processing turn T1 and shifts to the next processing turn (T3 in this embodiment) of the first image storage unit 10A.

  Subsequently, in the present embodiment, the process (T2) of the second image storage unit 10B corresponding to the other image storage unit of the first image storage unit 10A will be described.

  The processing time control unit 11a of the control unit 11 of the second image storage unit 10B reads the setting of the capture time zone stored in the memory 15. In the present embodiment, the processing time control unit 11a reads that the second image storage unit 10B is in the odd range as the setting of the capture time zone.

  In the present embodiment, as described above, the time that the processing time control unit 11a initially acquires from the NTP server 7 after the start of the observation of the insulator leakage current is an even number of minutes. The processing time control unit 11a of the second image storage unit 10B set to perform the capture does not initially output a processing command to the outside and continues to acquire time data from the NTP server 7 as it is. At this time, the first image storage unit 10A captures and records the monitoring image data (T1-S1). In the following, unless otherwise specified, processing of the means constituting the second image storage means 10B will be described.

  At the same time as the time acquired from the NTP server 7 ends at the even number level and becomes the odd number level, the processing time control unit 11a gives a command to start capturing and recording the monitoring image data to the monitoring image data recording unit 11b. Based on this command, the monitoring image data recording unit 11b captures the monitoring image data from the imaging unit 5 via the monitoring image data distributor 6, and records the captured monitoring image data in the monitoring image database 19 of the storage unit 12 (T2). -S1). The processing time control unit 11a continuously acquires time data.

  Here, simultaneously with the end of the even number of units, the monitoring image data recording unit 11b of the first image storage unit 10A has finished capturing and recording the monitoring image data (T1-S2), and the first image storage unit 10A. The monitoring image data is captured and recorded by the second image storage means 10B simultaneously (T2-S1) at the same time as the monitoring image data is captured and recorded (T1-S2), and continuous observation is performed without interruption. .

  When the time acquired by the processing time control unit 11a from the NTP server 7 ends at the odd number level and enters the even number level, the processing time control unit 11a issues a command to end the capture and recording of the monitoring image data. This is given to the monitoring image data recording unit 11b. The monitoring image data recording unit 11b ends the capturing and recording of the monitoring image data based on this command (T2-S2). Hereinafter, the time zone in which the monitoring image data recording unit 11b captures and records the monitoring image data in the processing turn (that is, T2), that is, the time zone from T2-S1 to T2-S2, is referred to as the T2 time zone. The monitoring image data recorded in the monitoring image database 19 in the T2 time zone is referred to as T2 time zone monitoring image data.

  Next, the data storage necessity determination unit 11c reads the T2 time zone insulator leakage current value data from the leakage current database 18 in the data server 4 and stores it in the memory 15 as T2 time zone leakage current value data (T2). -S3).

  Subsequently, the data storage necessity determination unit 11c specifies the maximum value (hereinafter referred to as the T2 time zone maximum value) in the T2 time zone leakage current value data stored in the memory 15. Then, the data storage necessity determination unit 11c compares the T2 time zone maximum value with the data storage necessity threshold value to determine whether the T2 time zone monitoring image data recorded in the monitoring image database 19 of the storage unit 12 is to be saved. Judge (T2-S4). The data storage necessity threshold setting and the like are the same as those in the first image storage unit 10A.

  The data storage necessity determination unit 11c reads the data storage necessity threshold value from the memory 15, and determines that the T2 time zone maximum value is equal to or less than the data storage necessity threshold value and it is not necessary to save the T2 time zone monitoring image data. In this case (T2-S4; No), a command to delete the T2 time zone monitoring image data recorded in the monitoring image database 19 is given to the monitoring image data deletion unit 11d. The monitoring image data erasure unit 11d erases the T2 time zone monitoring image data based on this command (T2-S5).

  On the other hand, when it is determined that the T2 time zone maximum value is larger than the data storage necessity threshold and it is necessary to save the T2 time zone monitoring image data (T2-S4; Yes), the data storage necessity judgment unit 11c In step T2-S3, the T2 time zone leakage current value data stored in the memory 15 is read, and this T2 time zone leakage current value data is written in the monitoring image database 19 as leakage current value data corresponding to the T2 time zone monitoring image data. .

  Step T2-S4; Following the processing in the case of Yes or the processing in Step T2-S5, the control unit 11 determines whether or not to stop the observation of the insulator leakage current (T2-S6). The setting for ending the observation of the insulator leakage current is the same as in the case of the first image storage means 10A.

  When the observation end time stored in the memory 15 is reached, or when an observation end instruction is stored in the memory 15 (T2-S6; Yes), the control unit 11 of the second image storage unit 10B The processing of the processing turn T2 is terminated and the observation of the leakage current is terminated (END).

  On the other hand, if the observation end time stored in the memory 15 is not reached, or if an observation end command is not stored in the memory 15 (T2-S6; No), the second image storage unit 10B The control unit 11 ends the processing of the processing turn T2 and proceeds to the next processing turn (T4 in this embodiment) of the second image storage unit 10B.

  Here, simultaneously with the end of the odd number of units, that is, the first image storage unit 10A simultaneously with the end of capturing and recording (T2-S2) of the monitoring image data of the processing turn T3 by the second image storage unit 10B in the processing turn T2. The capturing and recording of the monitoring image data by (3) is started (T3-S1). Then, simultaneously with the end of the capturing and recording (T3-S2), the capturing and recording of the monitoring image data of the processing turn T4 by the second image storage means 10B is started (T4-S1).

  As described above, the capturing and recording of the monitoring image data by the other image storage unit are started simultaneously with the end of the capturing and recording of the monitoring image data by the one image storing unit. In this embodiment, the two image storing units alternately The monitoring image data is continuously acquired without interruption.

  Then, for example, in order to acquire continuous monitoring image data without interruption alternately by two image storage units as in the present embodiment, one image storage unit captures and records the monitoring image data. It is necessary for the other image storage means to finish the processing from step S3 to S6 during the interval, that is, from step S1 to S2. Therefore, the monitoring image data capture time zone is set based on the time required for the image storage means to finish the processing from steps S3 to S6. In the case where the insulator leakage current observation apparatus is configured by using three or more image storage means, a plurality of other image storage means are alternately and continuously taken in while capturing and recording the monitoring image data. The number of image storage means and the time for one image storage means to capture and record the monitoring image data at a time are set so that the image storage means of one table can finish the processing from step S3 to S6. The

  In addition, although the above-mentioned form is an example of the suitable form of this invention, it is not limited to this, A various deformation | transformation implementation is possible in the range which does not deviate from the summary of this invention. For example, in the insulator leakage current observation apparatus 1 of the present embodiment, each image storage unit 10 controls the processing time and captures the monitoring image data according to the setting of the capturing time zone, but is not limited thereto. The monitoring image data distributor 6 controls the processing time and inputs the monitoring image data to each image storage means 10 according to the setting of the capture time zone. Each image storage is triggered by the start and end of this data input. The means 10 may perform processing.

  Further, the insulator leakage current observation device 1 of the present embodiment is configured to have a data server 4 that separately stores a leakage current database 18 in which insulator leakage current value data measured by the current measuring means 3 is accumulated. In some cases, however, the data server 4 may be omitted. In this case, the insulator leakage current value data measured by the current measuring unit 3 is directly input from the current measuring unit 3 to each image storage unit 10 and is recorded in the storage unit 12 of each image storage unit 10, step S <b> 3. The data storage necessity determination unit 11c specifies the maximum value from the leakage current value data recorded in the storage unit 12.

  In addition, the insulator leakage current observation device 1 of the present embodiment is configured to have an NTP server 7 that separately provides time data for synchronizing the processing time of each device constituting the device. Can be configured not to have the NTP server 7. In this case, either one of the image storage means 10 is provided with a control signal output function for the constituent devices of the leakage current observation apparatus 1, and the start and end of processing of each device are controlled according to this control signal.

It is a flowchart explaining an example of embodiment of the insulator leakage current observation apparatus which apparatus-ized the insulator leakage current observation method of this invention. It is a figure explaining the whole structure of the insulator leakage current observation apparatus of this embodiment. It is a figure which shows the functional block of the whole structure and the 1st and 2nd image preservation | save means of the insulator leakage current observation apparatus in the case of implementing the insulation leakage current observation method of this embodiment using a program.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulation leakage current observation apparatus 3 Current measurement means 4 Data server 5 Imaging means 6 Monitoring image data distributor 7 NTP server 10A First image storage means 10B Second image storage means

Claims (6)

  The leakage current of the insulator is measured using the current measuring means, the monitoring image of the insulator is acquired using the imaging means, and the leakage current is obtained from the monitoring image data captured by one of the plurality of image storage means. Determining whether or not to save based on the size of the image, while erasing when it is determined not to save, so that the other one of the plurality of image storage means capture the monitoring image data, The method for observing leakage current according to the present invention, wherein the capturing and erasing of the monitoring image data are alternately performed by the plurality of image storing means in accordance with a preset capturing time zone.   Current measuring means for measuring the leakage current of the insulator, imaging means for acquiring the monitoring image of the insulator, and alternately capturing the data of the monitoring image in accordance with a preset capturing time zone and the magnitude of the leakage current And a plurality of image storage means for erasing when it is determined that the monitoring image data is to be stored based on the determination.   At least a preset setting is made to an image capturing means for acquiring the insulator monitoring image and an image capturing means for acquiring the insulator monitoring image and a computer connected to be able to capture the monitoring image data. The monitoring image data based on the magnitude of the leakage current, the processing for fetching the monitoring image data from the imaging means in accordance with the capture time zone, the processing for reading the leakage current data during the acquisition of the monitoring image data from the database, A leakage current observing program that causes a process to determine whether to save the monitoring image data and a process to delete the monitoring image data when it is determined not to save the monitoring image data.   2. The method of observing an insulator leakage current according to claim 1, wherein the capture time zone is controlled based on a time provided by an NTP server. The insulator leakage current observation apparatus according to claim 2, wherein the capture time zone is controlled based on a time provided by an NTP server. 4. The insulator leakage current observation program according to claim 3, wherein the capture time zone is controlled based on a time provided by an NTP server.

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