Electric installation state monitoring system, monitoring system, and electric installation state monitoring method

Abstract

To provide an electric installation state monitoring system, a monitoring system, and an electric installation state monitoring method which can understand a three-dimensional state of an electric installation and an electromagnetic field emitted due to the state.SOLUTION: An electric installation state monitoring system 100 for monitoring a state of an electric installation includes: a reception section for receiving input of three-dimensional space information on an area including the electric installation, and an electromagnetic field data including electromagnetic field information on intensity of an electromagnetic field caused by the electric installation and a three-dimensional coordinate of a point at which the electromagnetic field information is acquired; a data superposition section 103 for superimposing the three-dimensional space information on the electromagnetic field data on the basis of the three-dimensional coordinate in the same space so as to generate superposition data; and a superposition data output section 104 for outputting the superposition data from the electric installation state monitoring system.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an electrical equipment status monitoring system, a monitoring system, and an electrical equipment status monitoring method, and more particularly to an electrical equipment status monitoring system that can be suitably used to grasp the status of electrical equipment in three dimensions. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there are devices that estimate the state of electrical equipment by measuring the strength of the electromagnetic field of the electrical equipment.

[0003] Patent Document 1 discloses an apparatus that includes a sensor probe on a mobile body and detects abnormal electric fields relative to the position of the mobile body in order to remotely measure electric field sources within a patrol area. Patent Document 2 discloses an apparatus that detects the electromagnetic field intensity in a space using an electromagnetic field sensor, captures an image of the space including the electromagnetic field sensor, and analyzes the captured image to visualize the spatial distribution of the electromagnetic field. Non-Patent Document 1 discloses a technique for measuring the intensity of an electric field radiated from a transmission tower, a wind turbine, or a utility pole and the distance to the radiation source, and estimating the voltage value of the radiation source. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] U.S. Patent No. 7,248,054 [Patent Document 2] International Publication No. 2009 / 028186 [Non-patent literature]

[0005] [Non-Patent Document 1] A. Pouryazdan, JC Costa, RJPrance, H. Prance and N. Munzenrieder, Non-contact long range AC voltage measurement, 2019 IEEE SENSORS, 2019, pp. 1-4 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in conventional methods, the positional relationship of the electromagnetic field is grasped as a two-dimensional image, for example. In this case, the positional relationship of the measurement object shown in the two-dimensional image is not known, and therefore, the abnormality of the electric field intensity at each position is not known. An object of the present invention is to provide an electrical equipment status monitoring system and the like that can grasp the three-dimensional appearance of electrical equipment and the electromagnetic field emitted due to its status. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides an electrical equipment status monitoring system for monitoring the status of electrical equipment, the electrical equipment status monitoring system including a reception unit that receives input of three-dimensional spatial information of an area including the electrical equipment, electromagnetic field information related to the strength of the electromagnetic field originating from the electrical equipment, and electromagnetic field data including three-dimensional coordinates of a point where the electromagnetic field information was acquired, a data superimposition unit that superimposes the three-dimensional spatial information and the electromagnetic field data in the same space based on the three-dimensional coordinates to generate superimposed data, and a superimposed data output unit that outputs the superimposed data from the electrical equipment status monitoring system. In this case, an electrical equipment status monitoring system that can grasp the three-dimensional appearance of the electrical equipment and the electromagnetic field emitted due to its status can be provided.

[0008] Here, a state determination unit is further provided that determines the state of the electrical equipment based on the electromagnetic field data, and the data superimposition unit can further superimpose information on the state of the electrical equipment. In this case, dangerous areas of electromagnetic field exposure in three-dimensional space are visualized, and abnormalities in the surrounding electrical equipment can be intuitively and spatially grasped. The state determination unit can determine the state of the electrical equipment based on the electromagnetic field data received by the reception unit and previously acquired electromagnetic field data. In this case, for example, the leakage voltage from the electrical equipment due to an increase in the ground resistance value appears as an electric field intensity, and the change can be visualized by utilizing this. Furthermore, the state determination unit includes a baseline calculation unit that calculates a baseline of electromagnetic field information acquired in the past, and the state determination unit can determine the state based on the degree of deviation between the electromagnetic field information received by the reception unit and the baseline. In this case, the state determination can be performed taking into account electromagnetic field radiation originating from normal operation during normal times, thereby improving the detection rate. Furthermore, the reception unit can output the three-dimensional spatial information to the data superimposition unit when the deviation is greater than a predetermined threshold value. In this case, the number of calculation targets after the data superimposition unit can be significantly reduced, so the performance of storage devices such as computer memories and processors such as CPUs (Central Processing Units) can be reduced, and the maintenance costs of the system can be reduced. The status determination unit can then calculate the distance between the electrical equipment and the point based on the three-dimensional spatial information and the three-dimensional coordinates, and determine the status of the electrical equipment by adding the distance information, thereby improving the accuracy of determining the status of the electrical equipment. The status determination unit can determine the status of the electrical equipment based on at least one of the voltage, current, and power of the electrical equipment, which are obtained by adding the distance information. In this case, the status determination unit can perform status determination based on the current flowing through the electrical equipment, the voltage applied thereto, and the power consumed by the electrical equipment, and can use clear indicators such as the rated voltage, rated current, and rated power set for the electrical equipment as threshold values. Furthermore, the electromagnetic field data includes vector information that is information on the direction to the electrical equipment, the state determination unit identifies the source of the electromagnetic field based on the vector information, and the data superimposition unit can superimpose the three-dimensional space information and the electromagnetic field data based on the identified source. In this case, the source of the electromagnetic field data can be identified, and when an abnormality such as an accident or failure occurs, the target object can be found more quickly. Furthermore, the system further includes a difference calculation unit that calculates the difference between multiple pieces of three-dimensional spatial information, and the reception unit can output the three-dimensional spatial information to the data superimposition unit when the difference is greater than a predetermined threshold. In this case, the system detects that the electrical equipment or its surroundings have changed by more than a certain amount, and monitors only that area, thereby reducing monitoring costs.

[0009] The present invention also provides a monitoring system comprising the electrical equipment status monitoring system according to any one of claims 1 to 9, a three-dimensional spatial information measuring device for measuring three-dimensional spatial information, an electromagnetic field measuring device for measuring electromagnetic field information by linking it to three-dimensional coordinates of a point, and a display device for displaying data superimposed by the electrical equipment status monitoring system, wherein the electromagnetic field measuring device comprises a three-dimensional coordinate measuring device for measuring three-dimensional coordinates, an electromagnetic field sensor for measuring at least one of an electric field and a magnetic field as electromagnetic field information, and a clock unit for time-synchronizing the measurement of the three-dimensional coordinates and the output data of the electromagnetic field sensor. In this case, even if the measurement timings of the three-dimensional coordinate measuring device and the electromagnetic field sensor are different, the data with the closest time given based on the clock unit can be extracted, and the most appropriate data can be referred to as the three-dimensional coordinates measured by the electromagnetic field sensor.

[0010] Here, the measurement timing of the 3D coordinate measuring device and the electromagnetic field sensor can be controlled based on the time measured by the timer unit. In this case, the electromagnetic field information for the monitoring area can be updated periodically, and changes in the status of the electrical equipment can be monitored periodically. The 3D spatial information measurement device and the electromagnetic field measurement device can be mounted on the same mobile object. In this case, it is possible to obtain electromagnetic field data and 3D spatial information while moving within a 3D space, enabling monitoring of a wider area and monitoring using information from multiple angles. Furthermore, the display device is carried by a worker who measures the electromagnetic field data, and the display device can display instructions about the measurement from the operator who sees the superimposed data. In this case, the operator in a remote location can obtain and interpret the electrical equipment information in the remote location based on intuitive instructions. The system may further include a visualization unit that inputs the superimposed data from the electrical equipment status monitoring system and visualizes at least a part of the area to be monitored in a virtual three-dimensional space using three-dimensional space information and electromagnetic field data. In this case, it is possible to provide intuitive monitoring of the status of electrical equipment in the area to be monitored, even remotely, using the electromagnetic field data displayed in the virtual three-dimensional space.

[0011] Furthermore, the present invention provides an electrical equipment status monitoring method for monitoring the status of electrical equipment, in which a processor executes a program recorded in a memory to receive input of three-dimensional spatial information of an area including the electrical equipment, electromagnetic field information related to the strength of the electromagnetic field originating from the electrical equipment, and electromagnetic field data including three-dimensional coordinates of a point where the electromagnetic field information was acquired, superimposing the three-dimensional spatial information and the electromagnetic field data in the same space based on the three-dimensional coordinates, generating superimposed data, and outputting the superimposed data. In this case, it is possible to provide an electrical equipment status monitoring method that can grasp the three-dimensional appearance of the electrical equipment and the electromagnetic field emitted due to its status. Effect of the Invention

[0012] According to the present invention, it is possible to provide an electrical equipment status monitoring system and the like that can grasp the three-dimensional aspect of the electrical equipment and the electromagnetic field generated due to the state of the equipment. [Brief description of the drawings]

[0013] [Figure 1] 1 is a block diagram illustrating an electrical equipment status monitoring system according to a first embodiment. [Diagram 2] 5(a) and 5(b) are diagrams showing an example of electromagnetic field information among the electromagnetic field data input to an electromagnetic field data input unit. [Diagram 3] FIG. 13 is a diagram showing an example of three-dimensional space information, in which the three-dimensional space information is three-dimensional point cloud data. [Figure 4] FIG. 13 is a diagram showing an example of electromagnetic field data, showing electric field intensity and magnetic field intensity with respect to latitude, longitude, and altitude. [Diagram 5] FIG. 11 is a block diagram illustrating the overall configuration of a monitoring system according to a second embodiment. [Figure 6] 10 is a flowchart showing a method in which a status determination unit determines a status of an electrical equipment in the second embodiment. [Figure 7] 13 is a diagram showing electromagnetic field data after a state determination flag is written in the second embodiment. FIG. [Figure 8] 10 is a flowchart showing a process performed by a data superimposing unit when further superimposing information on the state of electrical equipment. [Figure 9] FIG. 11 is a block diagram illustrating the overall configuration of a monitoring system according to a third embodiment. [Figure 10] 10A and 10B are diagrams showing electromagnetic field data held in an electromagnetic field data holding unit; [Figure 11] 11 is a flowchart showing a method in which a status determination unit determines the status of electrical equipment in the third embodiment. [Figure 12] 13 is a diagram showing electromagnetic field data after a state determination flag is written in the third embodiment. FIG. [Figure 13] FIG. 13 is a block diagram illustrating the overall configuration of a monitoring system according to a fourth embodiment. [Figure 14] 13 is a flowchart showing a method in which a status determination unit determines the status of electrical equipment in the fourth embodiment. [Figure 15] 13 is a diagram showing electromagnetic field data after a state determination flag is written in the fourth embodiment. FIG. [Figure 16]FIG. 15 is a diagram illustrating a method for defining a baseline in S1404 of FIG. [Figure 17] FIG. 13 is a block diagram illustrating the overall configuration of a monitoring system according to a fifth embodiment. [Figure 18] FIG. 13 is a block diagram illustrating the overall configuration of a monitoring system according to a sixth embodiment. [Figure 19] FIG. 13 is a diagram showing a case where a label indicating that the equipment is electrical equipment is present in three-dimensional point cloud data, which is three-dimensional spatial information. [Figure 20] 23 is a flowchart showing a method in which a status determination unit determines the status of electrical equipment by taking distance information into consideration in the sixth embodiment. [Figure 21] 13 is a flowchart showing a method in which a status determination unit determines the status of electrical equipment by taking distance information into consideration in the seventh embodiment. [Figure 22] FIG. 13 is a block diagram illustrating the overall configuration of a monitoring system according to a ninth embodiment. [Diagram 23] FIG. 23 is a block diagram showing the configuration of an electromagnetic field measuring device according to a tenth embodiment. [Figure 24] 13(a)-(b) are diagrams showing an example of data output by an output unit in embodiment 10. FIG. 13(c) is a diagram showing shaped data. [Diagram 25] FIG. 23 is a block diagram showing the configuration of an electromagnetic field measuring device of an eleventh embodiment. [Figure 26] FIG. 23 is a diagram showing an example of data output by an output unit in the eleventh embodiment. [Figure 27] FIG. 23 is a diagram showing a method for measuring the state of electrical equipment in the thirteenth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, the present invention will be described with reference to Embodiments 1 to 13 as follows.

[0015] [Embodiment 1] Hereinafter, electrical equipment status monitoring using the electrical equipment status monitoring system 100 of the first embodiment will be described. 1 is a block diagram illustrating an electrical equipment status monitoring system 100 according to a first embodiment. The electrical equipment status monitoring system 100 is a device that monitors the status of electrical equipment. The electrical equipment status monitoring system 100 includes a three-dimensional space information input unit 101, an electromagnetic field data input unit 102, a data superimposition unit 103, and a superimposed data output unit 104. A user acquires electromagnetic field data including three-dimensional spatial information of an area including electrical equipment, electromagnetic field information related to the strength of the electromagnetic field originating from the electrical equipment, and three-dimensional coordinates of a point where the electromagnetic field information is acquired, and inputs the electromagnetic field data to an electrical equipment status monitoring system 100 shown in the figure. The electrical equipment status monitoring system 100 accepts input of three-dimensional spatial information at a three-dimensional spatial information input unit 101 and electromagnetic field data at an electromagnetic field data input unit 102. In this case, the three-dimensional spatial information input unit 101 and the electromagnetic field data input unit 102 function as a receiving unit that accepts input of the three-dimensional spatial information and the electromagnetic field data. The input three-dimensional spatial information and electromagnetic field data are output from the three-dimensional spatial information input unit 101 and the electromagnetic field data input unit 102 to a data superimposition unit 103, respectively. The data superimposition unit 103 superimposes the three-dimensional spatial information and the electromagnetic field data in the same space based on the three-dimensional coordinates to generate superimposed data. The generated superimposed data is output from the electrical equipment status monitoring system 100 via a superimposed data output unit 104. A user uses the superimposed data output from the electrical equipment status monitoring system 100 to monitor the status of the electrical equipment.

[0016] The three-dimensional spatial information input to the present system can be acquired by a three-dimensional spatial information measuring device. The three-dimensional spatial information measuring device measures three-dimensional spatial information of an area including electrical equipment. The three-dimensional spatial information is data representing the three-dimensional shape of the electrical equipment or the like. The three-dimensional spatial information measuring device is, for example, a distance sensor that measures distance, such as a laser scanner such as LiDAR (Light Detection and Ranging). The LiDAR scans the surface of the electrical equipment or the like to measure the three-dimensional shape. Here, LiDAR is a device that measures the distance to an object by irradiating the object with a laser and receiving the reflected light. Due to this principle, the accuracy of distance measurement is relatively high, ranging from a few mm to a few cm. LiDAR uses a single straight-traveling laser as its basic unit, and captures the surface shape of the object as a collection of minute points (point cloud) by periodically changing the direction of irradiation at a high speed of several tens of Hz. In this case, the three-dimensional spatial information becomes data (three-dimensional point cloud data) that expresses the three-dimensional shape of electrical equipment, etc. as a point cloud.

[0017] The electromagnetic field data input to this system can be acquired by an electromagnetic field measuring device. The electromagnetic field measuring device measures electromagnetic field information, including information about the strength of the electromagnetic field of the electrical equipment, by linking it to the three-dimensional coordinates of the measurement point at which the electromagnetic field information is measured. The electromagnetic field measuring device includes a device for measuring the electromagnetic field information and the three-dimensional coordinates. As a method for measuring the electric field as the electromagnetic field, a method of converting the voltage generated across parallel plate electrodes in proportion to the spatial electric field strength into digital data using an analog-digital conversion circuit, or a method using a transducer such as an optical field element may be used. As a method for measuring the magnetic field as the electromagnetic field, a method using a coil, a magnetoresistance sensor element, or a Hall element may be used. The three-dimensional coordinates can be obtained by using a satellite positioning system such as the Global Positioning System (GPS), or by determining a reference point and measuring the relative distance from the reference point using distance measuring devices including sound waves, light, and various encoders. Here, the horizontal and vertical positions, i.e., latitude, longitude, and altitude, can be measured separately using different methods.

[0018] The three-dimensional space information input unit 101 is a functional unit that receives input of three-dimensional space information of an area including electrical equipment. The three-dimensional spatial information input to the three-dimensional spatial information input unit 101 is three-dimensional point cloud data acquired by a laser scanner such as the LiDAR described above, a Mobile Mapping System (MMS), or the like. However, the three-dimensional spatial information is not limited to this, and may be a three-dimensional image acquired by a 3D camera using a Time of Flight (ToF) method or a stereo method, a 3D model generated based on a photogrammetry method such as photogrammetry from a plurality of two-dimensional photographs, or Computer Aided Design (CAD) data in which the structure of an object such as an electrical facility is designed and drawn on a computer. This three-dimensional spatial information is data including a part or all of the electrical facility in a predetermined three-dimensional space. The three-dimensional spatial information input unit 101 accepts the input of the three-dimensional spatial information and outputs the three-dimensional spatial information to the data superimposition unit 103.

[0019] The electromagnetic field data input unit 102 is a functional unit that accepts input of electromagnetic field data including electromagnetic field information regarding the strength of the electromagnetic field originating from electrical equipment and the three-dimensional coordinates of the point where the electromagnetic field information was acquired, and outputs the electromagnetic field data to the data superposition unit 103. 2(a) and 2(b) are diagrams showing an example of electromagnetic field information among the electromagnetic field data input to the electromagnetic field data input unit 102. In FIG. An electromagnetic field refers to an electric field, a magnetic field, or both. Of these, Fig. 2(a) shows electric field intensity data 1200, with the horizontal axis representing frequency and the vertical axis representing electric field intensity. Fig. 2(b) shows magnetic field intensity data 1201, with the horizontal axis representing frequency and the vertical axis representing magnetic field intensity. The electric field intensity data 1200 and magnetic field intensity data 1201 are examples of electromagnetic field information. In electrical equipment that is the subject of remote maintenance, a magnetic field and an electric field are generated due to the current flowing through the electrical equipment and the voltage applied thereto. It is known that the magnitude of the magnetic field and the electric field changes depending on the current flowing through the electrical equipment and the voltage applied thereto. The current flowing through the electrical equipment and the voltage applied thereto are direct current or alternating current. When these are alternating currents and voltages of different frequencies may exist simultaneously, and the pattern may well represent the state of the electrical equipment. For example, in eastern Japan, the power frequency from a power plant is set to 50 Hz. In electrical equipment that supplies this power through a power distribution facility or the like, a magnetic field of 50 Hz is often emitted, and as shown in the magnetic field intensity data 1201, the magnetic field intensity may be greater than that of other frequencies. The electromagnetic field information input to the electromagnetic field data input unit 102 may be data that limits this frequency by passing through various filters, or may be data that combines the intensities measured at multiple frequencies into one value using a predetermined function. For example, Total Harmonic Distortion (THD), which is calculated based on the power frequency and its higher harmonic components, may also be input as electromagnetic field information. When inputting electromagnetic field information with a frequency band, it is desirable to input only frequencies up to approximately 50 times the power frequency. Generally, frequencies in this range contain a large amount of environmental noise that is not derived from the state of electrical equipment. The electromagnetic field data also includes three-dimensional coordinates of the position where the electromagnetic field information was acquired. The three-dimensional coordinates may be expressed as a relative distance from the coordinates of a reference point, or may be two-dimensional coordinates on the earth expressed by a geodetic system or a projected coordinate system, or may be coordinates based on height information such as altitude.

[0020] The data superimposing unit 103 superimposes the three-dimensional space information and the electromagnetic field data in the same space based on the three-dimensional coordinates, and generates superimposed data. Fig. 3 is a diagram showing an example of three-dimensional space information, in which the three-dimensional space information is three-dimensional point cloud data, and Fig. 4 is a diagram showing an example of electromagnetic field data, in which electric field intensity and magnetic field intensity are shown with respect to latitude, longitude, and altitude. The three-dimensional point cloud data is point cloud data consisting of a plurality of three-dimensional coordinates, and can represent the surface of trees and the ground, and the surface of electrical equipment such as utility poles and electric wires, as shown in FIG. 3. Meanwhile, the electromagnetic field data records the electromagnetic field strength with respect to three-dimensional coordinates such as latitude, longitude, and altitude, as shown in FIG. 4. In the data superimposition unit 103, for example, the electric field strength or magnetic field strength of the electromagnetic field information is scaled as red and blue brightness information according to the strength. In addition, the data superimposition unit 103 generates superimposition data by converting the latitude, longitude, and altitude into the three-dimensional coordinate format of the three-dimensional point cloud data and combining them. The generated superimposition data is output to the superimposition data output unit 104.

[0021] The superimposed data output unit 104 outputs the input superimposed data to the outside of the electrical equipment status monitoring system 100. For example, if the three-dimensional spatial information is three-dimensional point cloud data, it is output as a recordable point cloud file format such as LAS, CSV, or XYZ.

[0022] A user monitors the status of the electrical equipment by checking the superimposed data output from the electrical equipment status monitoring system 100. For example, a display terminal including a display device is prepared, and the superimposed data is visualized by a predetermined program. The display terminal is an example of a display device that displays the data superimposed by the electrical equipment status monitoring system 100. The display device may be, for example, a liquid crystal display or a touch panel. An example of the visualization is shown in Fig. 3. Fig. 3 shows three-dimensional point cloud data and a point cloud in which the electromagnetic field intensity included in the electromagnetic field information is expressed as a color, which are rendered in a virtual three-dimensional space. Since the data output by the electrical equipment status monitoring system 100 is three-dimensional data, it can be expressed as Virtual Reality (VR) by displaying it as 360-degree content in a head-mounted display, or as Augmented Reality (AR) by overlaying it on a two-dimensional image captured by a camera on a display device with a camera.

[0023] The electrical equipment status monitoring system 100 may be provided as a program. The program may operate on a server on the cloud to remotely transmit the three-dimensional spatial information and electromagnetic field data to the electrical equipment status monitoring system 100, and connect to an external display terminal. For example, a measuring device for measuring three-dimensional spatial information and an electromagnetic field measuring device for measuring the electromagnetic field may be installed in an area where the monitoring target is installed, and a display terminal may be installed in a control center. In addition, the electrical equipment status monitoring system 100 may be incorporated into the same device as the three-dimensional spatial information measuring device, the electromagnetic field measuring device, and the display terminal. This has the effect of allowing a monitor to use information such as electromagnetic fields that are invisible to the human eye and to perform advanced monitoring at a site where a monitoring target is nearby. In addition, the three-dimensional spatial information measuring device, the electromagnetic field measuring device, and the display terminal may be located in multiple locations. This has the effect of allowing the control center to single-handedly handle remote monitoring of multiple locations.

[0024] According to this embodiment, even in a remote location, 3D spatial information and electromagnetic field data measured on-site can be input, and electromagnetic field information caused by the state of the electrical equipment can be drawn in a virtual 3D space for a monitoring area including the electrical equipment and confirmed. Since the measurement data is displayed in a form superimposed on the monitoring target in the virtual 3D space, it is possible to monitor the state of the electrical equipment as if it were being measured on-site, even in a remote location.

[0025] [Embodiment 2] In the second embodiment, a monitoring system 1 will be described in which a display terminal 105, a three-dimensional spatial information measuring device 106, and an electromagnetic field measuring device 107 are added to the electrical equipment status monitoring system 100. The electrical equipment status monitoring system 100 of the second embodiment determines the status of the electrical equipment. FIG. 5 is a block diagram illustrating the overall configuration of a monitoring system 1 according to the second embodiment. The monitoring system 1 shown in FIG. 5 is similar to the electrical equipment status monitoring system 100 shown in FIG. 1 except that a status determination unit 200 is added.

[0026] The state determining unit 200 determines the state of the electrical equipment based on the electromagnetic field data. One of the state determination methods in state determination unit 200 is determination based on a defined threshold value. FIG. 6 is a flowchart showing a method in which the state determining unit 200 determines the state of the electrical equipment in the second embodiment. First, the electrical equipment status monitoring system 100 inputs electromagnetic field data to the status determination unit 200 (S601). Next, the state determination unit 200 reads a specified threshold value (S602). Then, the state determining unit 200 determines whether the electromagnetic field information of the electromagnetic field data exceeds a threshold value (S603). As a result, if it is exceeded (Yes in S603), the state determination unit 200 writes 1 to the state determination flag (S604). On the other hand, if the electromagnetic field information of the electromagnetic field data is equal to or less than the threshold value (No in S603), the state determination unit 200 writes 0 to the state determination flag (S605).

[0027] FIG. 7 is a diagram showing the electromagnetic field data after the state determination flag is written in the second embodiment. The electromagnetic field data shown in the figure is the electromagnetic field data shown in Fig. 4 to which a state determination flag has been added. In other words, the electromagnetic field data in Fig. 7 is the result of inputting the electromagnetic field data shown in Fig. 4 to state determination unit 200 in S601, and writing 1 or 0 as the state determination flag in S604 or S605.

[0028] The data superimposing unit 103 further superimposes information on the state of the electrical equipment. FIG. 8 is a flowchart showing the process performed by data superimposing unit 103 when further superimposing information on the state of electrical equipment. First, the data superimposing unit 103 reads the three-dimensional space information (S801). Next, the data superimposing unit 103 reads the electromagnetic field data accompanied by the state determination flag (S802). This is, for example, the one shown in FIG. Then, the data superimposing unit 103 determines whether the state determination flag is 1 or not (S803). As a result, if the state determination flag is 1 (Yes in S803), the data superimposing unit 103 plots (superimposes) a red point at the coordinates where the electromagnetic field data was acquired in the three-dimensional space information (S804). On the other hand, if the state determination flag is 0 (No in S803), the data superimposing unit 103 plots (superimposes) a black point at the coordinates in the three-dimensional space information where the electromagnetic field data was acquired (S805). In this way, the data superimposing unit 103 superimposes data at the electromagnetic field data acquisition position in the three-dimensional space by changing, for example, color information in accordance with the state determination flag.

[0029] Regarding the strength of the electromagnetic field emitted from electrical equipment, for example, the International Commission on Non-Ionizing Radiation Protection (ICNIRP) has presented regulatory values ​​and guidelines from the viewpoint of safety. For example, this can be used as a predefined threshold value to determine the state. According to this embodiment, the dangerous area of ​​electromagnetic field exposure in three-dimensional space is visualized, and there is an effect that an abnormality in the surrounding electrical equipment can be intuitively and spatially grasped.

[0030] [Embodiment 3] In the third embodiment, the state determining unit 200 determines the state of the electrical equipment based on the electromagnetic field data received by the electromagnetic field data input unit 102 and previously acquired electromagnetic field data. FIG. 9 is a block diagram illustrating the overall configuration of a monitoring system 1 according to the third embodiment. The monitoring system 1 shown in FIG. 9 is different from the monitoring system 1 shown in FIG. 5 in that an electromagnetic field data storage unit 300 is added, but otherwise is similar.

[0031] The electromagnetic field data storage unit 300 is the output destination of the electromagnetic field data input unit 102. The electromagnetic field data input to the status determination unit 200 is output from the electromagnetic field data storage unit 300. The electromagnetic field data storage unit 300 may be provided within the electrical equipment status monitoring system 100, or may be provided externally as shown in FIG. 9.

[0032] FIG. 10 is a diagram showing the electromagnetic field data held in the electromagnetic field data holding unit 300. As shown in FIG. 4, the electromagnetic field data acquired together with the data retention date and time are stored in the electromagnetic field data storage unit 300. That is, the electromagnetic field data shown in the figure is the electromagnetic field data shown in FIG. 4 with the data retention date and time added.

[0033] One method of determination by the state determination section 200 according to this embodiment is to determine an abnormality based on a difference from past electromagnetic field data. FIG. 11 is a flowchart showing a method in which the state determining unit 200 determines the state of the electrical equipment in the third embodiment. First, the electrical equipment status monitoring system 100 inputs the electromagnetic field data A from the electromagnetic field data storage unit 300 to the status determination unit 200 (S1101). The electromagnetic field data A is usually the latest electromagnetic field data. Next, the electrical equipment status monitoring system 100 inputs electromagnetic field data B of a predetermined date and time from the electromagnetic field data storage unit 300 to the status determination unit 200 (S1102). The electromagnetic field data B is, for example, electromagnetic field data measured for the first time on the monitoring target. It may also be electromagnetic field data from a certain time ago, such as one year or one hour ago. Next, the state determining unit 200 calculates the difference and the rate of change of the electromagnetic field information included in the electromagnetic field data A and the electromagnetic field data B (S1103). Moreover, the state determination unit 200 reads a specified threshold value (S1104). Then, the state determining unit 200 determines whether the calculated difference or rate of change exceeds a threshold value (S1105). As a result, if it is exceeded (Yes in S1105), the state determination unit 200 writes 1 to the state determination flag (S1106). On the other hand, if the calculated difference or rate of change is equal to or smaller than the threshold value (No in S1105), the state determination unit 200 writes 0 to the state determination flag (S1107). It should be noted that the calculated difference and rate of change can also be written in S1106 and S1107.

[0034] FIG. 12 is a diagram showing the electromagnetic field data after the state determination flag is written in the third embodiment. The electromagnetic field data shown in the figure is the electromagnetic field data shown in Fig. 10 to which the electric field intensity difference and the state determination flag have been added. That is, the electromagnetic field data in Fig. 12 is the result of the electromagnetic field data shown in Fig. 10 being input from the electromagnetic field data holding unit 300 to the state determination unit 200 in S1101 and S1102. Then, in S1106 or S1107, the electric field intensity difference and the state determination flag are written.

[0035] For example, electrical equipment may be earthed internally, and the state of the earth may be measured as earth resistance and inspected. The state of the earth changes daily due to wind, rain, and aging, and the earth resistance value may deviate from a specified range, requiring repair. According to this embodiment, the leakage voltage from electrical equipment accompanying an increase in the earth resistance value appears as an electric field intensity, and the change can be visualized by utilizing this fact. Since the location where deterioration progresses at a certain rate or more can be spatially grasped, there is an effect that Condition Based Maintenance (CBM) that optimizes the timing of repairs and inspections for each area can be realized.

[0036] [Embodiment 4] In the fourth embodiment, the status determination unit 200 includes a baseline calculation unit 400 that calculates a baseline of electromagnetic field data acquired in the past, and the status determination unit 200 determines the status based on the deviation between the electromagnetic field information received by the electromagnetic field data input unit 102 and the baseline. FIG. 13 is a block diagram illustrating the overall configuration of a monitoring system 1 according to the fourth embodiment. The monitoring system 1 shown in FIG. 13 differs from the monitoring system 1 shown in FIG. 9 in that the status determination section 200 includes a baseline calculation section 400, but is otherwise similar.

[0037] The baseline calculation unit 400 is usually provided in the state determination unit 200, receives the electromagnetic field data from the electromagnetic field data storage unit 300, and calculates a baseline based on the past data. The baseline means a normal value of the electromagnetic field information contained in the electromagnetic field data in a certain region, and is, for example, the electromagnetic field strength that is constantly present in that place due to environmental noise.

[0038] FIG. 14 is a flowchart showing a method in which the state determining unit 200 determines the state of the electrical equipment in the fourth embodiment. First, the electrical equipment status monitoring system 100 inputs a plurality of pieces of electromagnetic field data from the electromagnetic field data storage unit 300 to the baseline calculation unit 400 (S1401). Next, the baseline calculation section 400 specifies a range that includes the coordinates of the measurement point for the input electromagnetic field data (S1402), and assigns a range ID to each range. Next, the baseline calculation section 400 extracts electromagnetic field information in each range and calculates statistics (S1403). Furthermore, the baseline calculation section 400 defines the calculated value as the baseline for the corresponding range (S1404). Then, the electric equipment status monitoring system 100 inputs the electromagnetic field data of the determination target from the electromagnetic field data storage unit 300 to the status determination unit 200 (S1405). Furthermore, the state determining section 200 calculates the difference and rate of change between the electromagnetic field information included in the electromagnetic field data input in S1405 and the baseline (S1406). Next, the state determination unit 200 reads a predetermined threshold value (S1407). Then, the state determining section 200 determines whether the difference or rate of change from the baseline is equal to or greater than a threshold value (S1408). As a result, if it is exceeded (Yes in S1408), the state determination unit 200 writes 1 to the state determination flag (S1409). On the other hand, if the calculated difference or rate of change is equal to or smaller than the threshold value (No in S1408), the state determination unit 200 writes 0 to the state determination flag (S1410).

[0039] FIG. 15 is a diagram showing the electromagnetic field data after the state determination flag is written in the fourth embodiment. The electromagnetic field data shown in the figure is the electromagnetic field data shown in Fig. 10 to which a range ID, a baseline, a difference from the baseline, and a state determination flag have been added. In other words, the electromagnetic field data in Fig. 15 is the result of writing the range ID assigned in S1402, the baseline specified in S1404, the difference between the electromagnetic field information and the baseline calculated in S1406, and a state determination flag of 1 or 0 in S1409 or S1410 to the electromagnetic field data shown in Fig. 10.

[0040] FIG. 16 is a diagram illustrating a method for defining the baseline in S1404 of FIG. In Fig. 16, the horizontal axis represents the longitude in each range, and the vertical axis represents the latitude in each range. Fig. 16 is a diagram in which electric field intensity is plotted in latitude and longitude space as an example of electromagnetic field information. Since the baseline is a normal value of the electromagnetic field information in a certain area, a certain area is specified. In Fig. 16, a rectangular range that is divided by longitude and latitude is specified in advance. Note that this range is not limited to a rectangular shape, and can be any shape. Also, any space may be specified three-dimensionally in the shape of a sphere or voxel. For example, the baseline in range A can be calculated as the average value of multiple electric field strengths present within range A. Here, any statistical value or representative value other than the average value can be used. When calculating the baseline for range A and range B in Figure 16, the electric field strength indicated by the data in range A is approximately 0 V / m, whereas an electric field strength of approximately 3 V / m is calculated as the baseline for range B. If the electrical equipment is in a normal state on the date and time this electromagnetic field information is measured, this baseline will represent the electric field strength emitted from the electrical equipment in a normal state.

[0041] In this embodiment, since the state can be determined taking into account electromagnetic field radiation generated during normal operation, the detection rate can be improved.

[0042] [Embodiment 5] In the fifth embodiment, the three-dimensional space information input unit 101 determines whether or not to output the three-dimensional space information to the data superimposition unit 103 depending on the state of the electrical equipment. FIG. 17 is a block diagram illustrating the overall configuration of a monitoring system 1 according to the fifth embodiment. The monitoring system 1 shown in FIG. 17 differs from the monitoring system 1 shown in FIG. 13 in that the difference and rate of change (deviation) between the electromagnetic field information input in S1405 of FIG. 14 and the baseline are input to the three-dimensional spatial information input unit 101, but is otherwise similar. The three-dimensional spatial information input unit 101 accepts input of three-dimensional spatial information by narrowing it down to areas where the difference or rate of change (deviation) is greater than a predetermined threshold, or selects and extracts the input three-dimensional spatial information and outputs it to the data superposition unit 103.

[0043] This allows a significant reduction in the number of calculation targets after the data superposition unit 103, which has the effect of suppressing the performance of storage devices such as computer memories and processors such as CPUs, thereby reducing the maintenance costs of the system. In addition, by operating the system with the same specifications, it has the effect of shortening the calculation time and minimizing the waiting time at the site by returning the results instantly.

[0044] [Embodiment 6] In the sixth embodiment, the status determining unit 200 calculates the distance between the electrical equipment and the measurement point, and determines the status of the electrical equipment by adding the distance information. FIG. 18 is a block diagram illustrating the overall configuration of a monitoring system 1 according to the sixth embodiment. 18 is different from the monitoring system 1 shown in FIG. 5 in that the three-dimensional space information output from the three-dimensional space information input unit 101 is input to the state determination unit 200. In the monitoring system 1 shown in FIG. The state determination unit 200 calculates the distance between the electrical equipment and the measurement point based on the three-dimensional spatial information and the three-dimensional coordinates of the measurement point. In particular, when a label indicating that the electrical equipment is an electrical facility is present in the three-dimensional point cloud data, which is three-dimensional spatial information, as shown in Fig. 19, the distance between the electrical equipment and the measurement point can be calculated. Then, the status determination unit 200 determines the status of the electrical equipment by adding the distance information. Specifically, the status determination unit 200 calculates a threshold value according to the distance, and uses it as the threshold value when determining the status of the electrical equipment. In the case of Fig. 19, the status determination unit 200 calculates the distance between the electric wire, which is the electrical equipment, and the measurement point, and determines the status of the electric wire.

[0045] FIG. 20 is a flowchart showing a method in which the status determining unit 200 determines the status of the electrical equipment by taking distance information into account in the sixth embodiment. First, the electrical equipment status monitoring system 100 inputs electromagnetic field data to the status determination unit 200 (S2001). Next, the electrical equipment status monitoring system 100 inputs the three-dimensional space information to the status determination unit 200 (S2002). Next, the state determining section 200 calculates the distance between the measurement point of the electromagnetic field data and an arbitrary location within the three-dimensional space (S2003). Furthermore, the state determination unit 200 acquires a predetermined threshold value (S2004). Furthermore, the state determination unit 200 calculates the threshold value and the distance, and calculates the threshold value according to the distance (S2005). Then, the state determining section 200 determines whether the electromagnetic field information included in the electromagnetic field data exceeds a threshold value according to the distance (S2006). As a result, if it is exceeded (Yes in S2006), the state determination unit 200 writes 1 to the state determination flag (S2007). On the other hand, if the electromagnetic field information included in the electromagnetic field data is equal to or less than the threshold value (No in 2006), the state determination unit 200 writes 0 to the state determination flag (S2008).

[0046] Generally, electric field strength or magnetic field strength may attenuate with distance from the radiation source, so by using a threshold based on distance, the accuracy of determining the state of electrical equipment can be improved. In addition, by directly superimposing the calculated distance, it is possible to ensure that the observer or measuring device has acquired data on the monitored object from an appropriate distance, or to evaluate its safety.

[0047] [Embodiment 7] In the seventh embodiment, the state determining unit 200 determines the state of the electrical equipment based on at least one of the voltage, current, and power of the electrical equipment, which is obtained by adding distance information. The overall configuration of the monitoring system 1 of the seventh embodiment is similar to that of the sixth embodiment shown in FIG. By utilizing the distance calculation method shown in the sixth embodiment, the voltage and current of the monitored object can be estimated from the electric field and magnetic field data.

[0048] FIG. 21 is a flowchart showing a method in which the status determining unit 200 determines the status of the electrical equipment by taking distance information into consideration in the seventh embodiment. In FIG. 21, S2101 to S2103 are the same as S2001 to S2003 in FIG. After S2003, the state determining unit 200 calculates at least one of the voltage, the current, and the power from the distance and the electromagnetic field data (S2104). Next, the state determining unit 200 acquires a predetermined threshold value (S2105). Then, the state determining unit 200 determines whether any one of the calculated voltage, current, and power exceeds a threshold value (S2106). As a result, if it is exceeded (Yes in S2106), the state determination unit 200 writes 1 to the state determination flag (S2107). On the other hand, if any of the calculated voltage, current, and power is equal to or lower than the threshold value (No in 2106), the state determination unit 200 writes 0 to the state determination flag (S2108).

[0049] A specific calculation example is shown below. For example, it is known that the electric field strength radiated from a single-phase overhead distribution line has attenuation characteristics in the direction perpendicular to the line, with the distance characteristic of the electric field to the side being proportional to the inverse of the square of the distance between the body and the measurement position. Also, suppose that a current I [A] flows through a certain wire. The magnetic field strength ΔH [A / m] at any point P around this wire can be expressed by the following formula 1 using the infinitesimal length Δl [m] around point O on this wire and the distance r [m] from point O to point P, according to Biot-Savart's law.

[0050]

number

[0051] Here, θ is the angle between the tangent to Δl and the line segment between point O on the wire and an arbitrary point P. Also, power can be calculated as the product of voltage and current. For complex spaces that are difficult to formulate, distance information and three-dimensional space information calculated in a simulator using the finite element method may be input, and an exploratory estimation may be performed to find an electrical equipment state that gives results that are close to the electromagnetic field data. The calculated voltage, current, and power are compared as absolute values ​​with a predetermined threshold value to determine the status. At this time, the threshold value can be specified as an absolute value related to the electrical equipment, so a specific numerical value from a prescribed inspection item may be used. In addition, the status may be classified into multiple statuses according to multiple threshold values.

[0052] According to this embodiment, the state determination unit 200 can determine the state based on the current flowing through the electrical equipment, the voltage applied thereto, and the power consumed by the electrical equipment, and has the effect of being able to use clear indicators such as the rated voltage, rated current, and rated power set for the electrical equipment as thresholds. In addition, by classifying the causes of abnormalities in the electrical equipment into current, voltage, and power, it has the effect of improving repair efficiency. For example, in a three-phase AC distribution line, when a ground fault occurs, the zero-phase current indicating the total value of the currents flowing through the three phases indicates a certain value or more. The presence or absence of a ground fault can be determined by estimating the zero-phase current from electromagnetic field data measured at multiple points.

[0053] [Embodiment 8] In the eighth embodiment, the electromagnetic field data includes vector information that is information on the direction to the electrical equipment, the status determination unit 200 identifies the source of the electromagnetic field based on the vector information, and the data superimposition unit 103 superimposes the three-dimensional spatial information and the electromagnetic field data based on the identified source.

[0054] The electromagnetic field data in the eighth embodiment includes vector information. That is, the direction as well as the strength of the electromagnetic field at the measurement point can be known. In a simple example, when two electrical equipment of the same type are installed at a distance from each other, the state determination unit 200 can determine which electrical equipment the electromagnetic field originates from based on the directionality of the electromagnetic field data measured around them. More specifically, when an electric potential is generated on the surface of an electrical equipment, an electric field is usually emitted toward the ground at a distance. Therefore, when the measurement point is sufficiently close to the electrical equipment, an electric field source exists in the opposite direction to the direction of the measured electromagnetic field. Therefore, the surface of the electric field source is specified based on the intersection point between a straight line drawn in the opposite direction to the direction of the electromagnetic field and the surface of the electrical equipment present in the three-dimensional space information. A part or all of the surface of the source is output to the data superimposition unit 103, and the data is combined, for example, by changing the color.

[0055] According to this embodiment, it is possible to identify the source of electromagnetic field data that has been determined to be in a certain state, which has the effect of making it possible to more quickly find the object in question when an abnormality such as an accident or malfunction occurs.

[0056] [Embodiment 9] In embodiment 9, the electrical equipment status monitoring system 100 is provided with a difference calculation unit 700 that calculates the difference between multiple pieces of three-dimensional spatial information, and the three-dimensional spatial information input unit 101 outputs the three-dimensional spatial information to the data superposition unit 103 when the difference is greater than a predetermined threshold value.

[0057] FIG. 22 is a block diagram illustrating the overall configuration of a monitoring system 1 according to the ninth embodiment. The monitoring system 1 shown in FIG. 22 differs from the monitoring system 1 shown in FIG. 18 in that a difference calculation unit 700 is added to the electrical equipment status monitoring system 100, but is otherwise similar. When multiple pieces of three-dimensional space information are input to the three-dimensional space information input unit 101, the difference calculation unit 700 calculates the difference between at least two pieces of three-dimensional space information. The difference is calculated for each three-dimensional coordinate, and three-dimensional coordinates where this difference is equal to or greater than a certain value are extracted. The three-dimensional space information is referenced using the extracted three-dimensional coordinates as a key, and a part or all of it is output to the state determination unit 200.

[0058] In general, the service life of electrical equipment is long, measured in years, and the surrounding conditions may not change much. In addition, power distribution equipment and the like are laid across entire cities or prefectures, so the monitoring area is wide. According to this embodiment, by detecting a certain amount of change in the electrical equipment or its surroundings and remotely monitoring only that area, it is possible to reduce monitoring costs.

[0059] [Embodiment 10] The tenth embodiment is characterized by the configuration of the electromagnetic field measuring device 107 . FIG. 23 is a block diagram showing the configuration of an electromagnetic field measuring device 107 according to the tenth embodiment. The electromagnetic field measurement device 107 shown in FIG. 23 includes a three-dimensional coordinate measurement device 900, an electromagnetic field sensor 901, a clock 902, and an output unit 903.

[0060] The three-dimensional coordinate measuring device 900 is a device that measures the three-dimensional coordinates of a predetermined area based on a predetermined method. Methods for measuring three-dimensional coordinates include a method that uses a satellite positioning system such as the Global Positioning System (GPS), and a method that determines a reference point and measures the relative distance from the reference point using a distance measuring device including sound waves, light, and various encoders. In addition, horizontal and vertical positions, i.e., latitude and longitude and altitude, may be measured separately using different methods.

[0061] The electromagnetic field sensor 901 is a device that measures at least one of an electric field and a magnetic field as electromagnetic field information at a measurement point based on a predetermined method. The electric field can be measured by converting the voltage generated across parallel plate electrodes in proportion to the spatial electric field strength into digital data using an analog-digital conversion circuit, or by using a transducer such as an optical field element. The magnetic field can be measured by using a coil, a magnetoresistance sensor element, or a Hall element.

[0062] The three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901 are connected to an output unit 903 , which outputs the three-dimensional coordinates and electromagnetic field information together with the time measured by a clock 902 . In this case, the clock 902 functions as a clock unit for time-synchronizing the measurement of the three-dimensional coordinates with the output data of the electromagnetic field sensor.

[0063] 24(a) and (b) are diagrams showing an example of data output by the output unit 903 in the tenth embodiment. 24(a) shows the measurement result of the three-dimensional coordinates to which time has been added. In this manner, the data measured by the three-dimensional coordinate measuring device 900 is provided with the measurement time by the clock 902. 24(b) shows the time-stamped measurement result of electromagnetic field sensor 901. In this manner, the data measured by electromagnetic field sensor 901 is stamped with the measurement time by clock 902. According to this embodiment, when the three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901 are at a certain distance from each other, even if the measurement timings of the three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901 are different, data with the closest time given based on the clock 902 is extracted. Then, by shaping the data into, for example, data as shown in Fig. 24(c), it is possible to refer to the most appropriate data as the three-dimensional coordinates measured by the electromagnetic field sensor 901. As a result, it is possible to reduce the effort required to synchronize the measurement timings of the three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901.

[0064] [Embodiment 11] The eleventh embodiment also has a feature in the configuration of the electromagnetic field measuring device 107 . FIG. 25 is a block diagram showing the configuration of an electromagnetic field measuring device 107 according to the eleventh embodiment. Electromagnetic field measurement device 107 shown in FIG. 25 differs from electromagnetic field measurement device 107 shown in FIG. 23 in that a timing control device 1000 is added, but otherwise is similar. The timing control device 1000 receives the time output from the clock 902 and drives the three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901 at a predetermined time. This can also be said that the timing control device 1000 controls the measurement timing of the three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901 based on the time kept by the clock 902. The timing control device 1000 can drive the three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901 at regular intervals.

[0065] FIG. 26 is a diagram showing an example of data output by the output unit 903 in the eleventh embodiment. As shown in FIG. 26, at the time synchronized by the timing control device 1000, the measurement results of the three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901 are recorded and output.

[0066] According to this embodiment, it is possible to periodically update electromagnetic field information for a monitoring area, and it is possible to periodically monitor changes in the state of electrical equipment. Furthermore, by driving the three-dimensional coordinate measuring device 900 and the electromagnetic field sensor 901 at the same timing, it is possible to more accurately record the measurement points measured by the electromagnetic field sensor.

[0067] [Embodiment 12] In the twelfth embodiment, the three-dimensional spatial information measuring device 106 and the electromagnetic field measuring device 107 are mounted on the same moving object. A mobile object is an object that moves in three-dimensional space, and includes living beings such as humans, ground vehicles such as vehicles and carts, flying objects such as drones and airplanes, and inspection robots that move through tunnels or underground.

[0068] According to this embodiment, electromagnetic field data and three-dimensional spatial information can be acquired while moving within three-dimensional space, which has the effect of enabling monitoring of a wider area and monitoring using information from multiple angles. In addition, by mounting the device on a mobile object that can move autonomously, costs can be reduced compared to manual measurement, and it can provide remote monitoring of high, difficult, and dangerous locations where measurement by hand is difficult.

[0069] [Embodiment 13] In the thirteenth embodiment, the display terminal 105 is carried by a worker who measures the electromagnetic field data, and displays instructions about the measurement from the operator who has viewed the superimposed data. In addition, the monitoring system 1 includes a visualization unit 802 that inputs the superimposed data and visualizes at least a part of the area to be monitored in a virtual three-dimensional space using three-dimensional space information and electromagnetic field data.

[0070] FIG. 27 is a diagram showing a method for measuring the state of electrical equipment in the thirteenth embodiment. A worker who acquires electromagnetic field data and three-dimensional spatial information for a specific space in which electrical equipment is installed acquires data for the specific area using the three-dimensional spatial information measuring device 106 and the electromagnetic field measuring device 107, and inputs the data to the computing device 801. Data input may be performed wirelessly via public wireless.

[0071] The computing device 801 is one form of the electrical equipment status monitoring system 100, which superimposes input data and displays the superimposed data on a visualization unit 802 of a monitoring device 803 held by an operator at a remote location. The monitoring device 803 includes an input instruction unit 1100 that inputs at least one of a data measurement location and a measurement data type, and is operated by input from a keyboard, mouse, voice, etc. that are connected to an input I / F (interface) of the computing device 801. The instructions input to the input instruction unit 1100 can be displayed in a form superimposed on the virtual three-dimensional space, which has the effect of promoting intuitive understanding of the instructions. The instructions input to the input instruction unit 1100 can also be viewed on the display terminal 105 at the worker's hand, and the worker moves or performs additional measurements based on the instructions. Data obtained by additional measurements is input again to the calculation device 801, whereby the data output to the monitoring device 803 is updated, and the display on the visualization unit 802 is also updated accordingly.

[0072] According to the present embodiment, an operator in a remote location can obtain and interpret electrical equipment information in a remote location based on intuitive instructions. In addition, since a worker can perform the work without knowledge of electrical equipment, and only needs knowledge of measuring devices, the cost of securing workers can be reduced.

[0073] Further, a method for intuitively remotely monitoring the state of electrical equipment will be described. In this method, the electrical equipment status monitoring system 100 receives three-dimensional spatial information acquired in an area including a part of the target to be remotely monitored and electromagnetic field data derived from the state of the electrical equipment. The reception may be performed using wireless communication or wired communication. The electrical equipment status monitoring system 100 generates superimposed data by superimposing the three-dimensional spatial information and the electromagnetic field data based on three-dimensional coordinates, and transmits the generated superimposed data to a monitoring device 803 equipped with a visualization unit 802. The transmission may be performed using wireless communication or wired communication. The electrical equipment status monitoring system 100 displays the superimposed data as a virtual three-dimensional space via the monitoring device 803. The monitoring device 803 can visualize the superimposed data as VR by displaying it as 360-degree content in a head-mounted display, or visualize it as AR by transmitting the superimposed data to a display device equipped with a camera together with a two-dimensional image captured by the camera and displaying it as an overlay.

[0074] According to this embodiment, it is possible to provide an intuitive monitoring of the state of electrical equipment in a monitored area, even from a remote location, by using electromagnetic field data displayed in a virtual three-dimensional space.

[0075] The processing performed by the electrical equipment status monitoring system 100 in the present embodiment described above is realized by cooperation between software and hardware resources. That is, a processor such as a CPU provided in the electrical equipment status monitoring system 100 loads into a main memory and executes a program that realizes each function of the electrical equipment status monitoring system 100, thereby realizing each function.

[0076] Therefore, the processing performed by the above-mentioned electrical equipment status monitoring system 100 can be considered to be an electrical equipment status monitoring method for monitoring the status of electrical equipment, in which a processor executes a program recorded in memory to accept input of three-dimensional spatial information of an area including the electrical equipment, electromagnetic field information regarding the strength of the electromagnetic field originating from the electrical equipment and electromagnetic field data including three-dimensional coordinates of the point where the electromagnetic field information was acquired, superimposes the three-dimensional spatial information and the electromagnetic field data in the same space based on the three-dimensional coordinates, generates superimposed data, and outputs the superimposed data.

[0077] The program for implementing the present embodiment can be provided not only by communication means but also by being stored in a recording medium such as a CD-ROM.

[0078] Although the present embodiment has been described above, the technical scope of the present invention is not limited to the scope described in the above embodiment. It is clear from the claims that various modifications and improvements to the above embodiment are also included in the technical scope of the present invention. [Explanation of symbols]

[0079] 1...monitoring system, 100...electrical equipment status monitoring system, 101...three-dimensional spatial information input section, 102...electromagnetic field data input section, 103...data superimposition section, 104...superimposed data output section, 105...display terminal, 106...three-dimensional spatial information measuring device, 107...electromagnetic field measuring device, 200...status determination section, 300...electromagnetic field data storage section, 400...baseline calculation section, 700...difference calculation section, 801...calculation device, 802...visualization section, 803...monitoring device, 900...three-dimensional coordinate measuring device, 901...electromagnetic field sensor, 902...clock, 903...output section, 1000...timing control device

Claims

1. An electrical equipment status monitoring system for monitoring a status of electrical equipment, comprising: a reception unit that receives input of three-dimensional spatial information of an area including the electrical equipment, electromagnetic field information regarding the intensity of an electromagnetic field originating from the electrical equipment, and electromagnetic field data including three-dimensional coordinates of a point where the electromagnetic field information is acquired; a data superimposition unit that superimposes the three-dimensional spatial information and the electromagnetic field data in the same space based on the three-dimensional coordinates to generate superimposed data; a superimposed data output unit that outputs the superimposed data from the electrical equipment status monitoring system; An electrical equipment status monitoring system comprising:

2. A state determination unit that determines a state of the electrical equipment based on the electromagnetic field data, The electrical equipment status monitoring system according to claim 1 , wherein the data superimposing unit further superimposes information on the status of the electrical equipment.

3. The electrical equipment status monitoring system according to claim 2 , wherein the status determination unit determines the status of the electrical equipment based on the electromagnetic field data received by the reception unit and previously acquired electromagnetic field data.

4. The state determination unit includes a baseline calculation unit that calculates a baseline of electromagnetic field information acquired in the past, The electrical equipment status monitoring system according to claim 3 , wherein the status determination unit determines the status based on a deviation between the electromagnetic field information received by the reception unit and the baseline.

5. The electrical equipment status monitoring system according to claim 4 , wherein the reception unit outputs the three-dimensional space information to the data superimposition unit when the degree of deviation is greater than a predetermined threshold value.

6. The electrical equipment status monitoring system of claim 2, wherein the status determination unit calculates a distance between the electrical equipment and the point based on the three-dimensional spatial information and the three-dimensional coordinates, and determines the status of the electrical equipment by adding the distance information.

7. The electrical equipment status monitoring system according to claim 6 , wherein the status determination unit determines the status of the electrical equipment based on at least one of the voltage, current, and power of the electrical equipment, which is obtained by adding information on the distance.

8. The electromagnetic field data includes vector information that is information about a direction to the electrical equipment, The state determination unit identifies a source of the electromagnetic field based on the vector information, The electrical equipment status monitoring system according to claim 2 , wherein the data superimposing unit superimposes the three-dimensional space information and the electromagnetic field data on the basis of the identified source.

9. A difference calculation unit is provided which calculates a difference between a plurality of pieces of the three-dimensional space information, The electrical equipment status monitoring system according to claim 1 , wherein the reception unit outputs the three-dimensional space information to the data superimposition unit when the difference is greater than a predetermined threshold value.

10. An electrical equipment status monitoring system according to any one of claims 1 to 9; a three-dimensional space information measuring device that measures the three-dimensional space information; an electromagnetic field measuring device that measures the electromagnetic field information in association with the three-dimensional coordinates of the point; a display device that displays the data superimposed by the electrical equipment status monitoring system; Equipped with The electromagnetic field measuring device includes: a three-dimensional coordinate measuring device that measures the three-dimensional coordinates; an electromagnetic field sensor that measures at least one of an electric field and a magnetic field as the electromagnetic field information; a timekeeping unit for time-synchronizing the measurement of the three-dimensional coordinates with output data of the electromagnetic field sensor; A surveillance system comprising:

11. The monitoring system according to claim 10, wherein measurement timings of the three-dimensional coordinate measuring device and the electromagnetic field sensor are controlled based on the time kept by the timer.

12. The monitoring system according to claim 10 , wherein the three-dimensional spatial information measuring device and the electromagnetic field measuring device are mounted on the same moving object.

13. The display device is carried by a worker who measures the electromagnetic field data, The monitoring system according to claim 10 , wherein the display device displays instructions regarding measurements by an operator who has viewed the superimposed data.

14. The monitoring system according to claim 10, further comprising a visualization unit that inputs the data superimposed by the electrical equipment status monitoring system and visualizes at least a portion of the monitored area in a virtual three-dimensional space using the three-dimensional spatial information and the electromagnetic field data.

15. 1. An electrical equipment status monitoring method for monitoring a status of electrical equipment, comprising: The processor executes the program stored in the memory, Accepting input of three-dimensional spatial information of an area including the electrical equipment, electromagnetic field information regarding the intensity of an electromagnetic field originating from the electrical equipment, and electromagnetic field data including three-dimensional coordinates of a point where the electromagnetic field information was acquired; superimposing the three-dimensional spatial information and the electromagnetic field data in the same space based on the three-dimensional coordinates to generate superimposed data; outputting the superimposed data; Electrical equipment condition monitoring methods.

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