JP2020165729A - Distance measurement device, distance measurement method, and distance measurement program - Google Patents

Abstract

To enable easy and accurate distance measurement using image analysis and make periodic patrol work efficient.SOLUTION: A distance measurement system 1 comprises: an information browsing terminal 5 for displaying a facility image obtained by capturing a facility including an electric pole and an electric wire using a plurality of imaging devices on a screen; and an image analysis device 4 for measuring a distance between the electric wire and the ground, a distance between the electric wires, or a distance between the electric pole and a wall surface in the facility image using image analysis. The image analysis device 4 performs position identification of the electric wire and the ground in the case of the distance measurement between the electric wire and the ground, position identification of at least one electric wire in the case of the distance measurement between the electric wires, and position identification of the wall surface in the case of the distance measurement between the electric pole and the wall surface, based on position specification of three or more points by a user in the facility image displayed on the screen.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a distance measuring device, a distance measuring method, and a distance measuring program that measure a distance by image analysis.

Conventionally, for the purpose of efficiently performing maintenance and inspection work on utility poles, a digital map in which the position of utility poles is indicated by an icon and an image including utility poles are displayed on the display screen of an information terminal device used by workers. Is being done. In this way, the worker can identify the position of the utility pole on the digital map and visually confirm the state of the work site by the image before heading to the work site.

In Patent Document 1, a map application that displays a map and a street view (registered trademark) application that displays a landscape along a road are linked, and the position of an electric pole is displayed as an icon on a digital map by the map application. At the same time, a technology for displaying an image of the scenery around the facility is disclosed by a street view (registered trademark) application. Further, Patent Document 2 discloses a method for measuring the looseness of an electric wire at a utility pole facility site.

Japanese Patent No. 6236101 Japanese Patent No. 4472618

Equipment and objects (hereinafter referred to simply as "equipment") to confirm whether or not the separation distance specified in the technical standards for electrical equipment is secured during regular patrols of distribution equipment such as electric wires and utility poles (hereinafter referred to simply as "equipment"). The shortest distance of the ground, wall surface, etc.) is measured.

However, although a method for measuring the slack of an electric wire using a computer has been proposed, the above-mentioned distance measurement is currently performed manually, such as by measuring with a measuring rod or visually with binoculars. Therefore, the accuracy of the measurement work depends on the work environment at the site and the skill of the individual. In addition, due to changes in the environment such as a decrease in the number of skilled technicians, more efficient on-site work is required.

The present disclosure has been devised in view of such problems of the prior art, and is a distance measuring device capable of easy and accurate distance measurement by image analysis and efficient work in regular patrol. , Contributes to the provision of distance measurement methods and distance measurement programs.

The distance measuring device of the present disclosure includes a display means for displaying an equipment image obtained by capturing an image of equipment including an electric pole and an electric wire using a plurality of imaging devices, a distance between the electric wire and the ground in the equipment image, and the above. A measuring means for measuring the distance between electric wires or the distance between the electric pole and the wall surface is provided, and the measuring means identifies the positions of the electric wire and the ground when measuring the distance between the electric wire and the ground. When measuring the distance between the electric wires, the position of at least one of the electric wires is specified, and when measuring the distance between the electric pole and the wall surface, the position of the wall surface is specified. The equipment image displayed on the screen. It is performed based on the position designation of 3 points or more by the user.

In the distance measuring method of the present disclosure, an equipment image obtained by capturing an image of equipment including an electric pole and an electric wire using a plurality of imaging devices is displayed on a screen, and a user can tell the distance between the electric wire and the ground in the equipment image. A distance measuring method in which a request for measuring the distance between electric wires or the distance between the electric pole and the wall surface is received and the distance is measured in response to the request. When measuring the distance between the electric wire and the ground, The position of the electric wire and the ground is specified, the position of at least one of the electric wires is specified when measuring the distance between the electric wires, and the position of the wall surface is specified when measuring the distance between the electric pole and the wall surface. This is performed based on the position designation of three or more points by the user with respect to the equipment image displayed above.

It should be noted that these comprehensive or specific embodiments may be realized in a system, an integrated circuit, a computer program, or a recording medium, and any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium. It may be realized by.

According to the present disclosure, image analysis enables easy and accurate distance measurement, and makes work in regular patrols more efficient.

Further advantages and effects in the present disclosure will be apparent from the specification and drawings. Such advantages and / or effects are provided by some embodiments and features described in the specification and drawings, respectively, but not all need to be provided in order to obtain one or more identical features. There is no.

Configuration diagram showing the outline of the distance measurement system according to the present disclosure A diagram showing an example of a digital map stored in a map database Block diagram showing the hardware configuration of the image acquisition device Flow chart showing the flow of image acquisition processing in the image acquisition device Block diagram showing the hardware configuration of the image analyzer Block diagram showing the functional configuration of the image analyzer Diagram showing an example of image data Diagram showing an example of equipment data Diagram showing an example of management data Block diagram showing the hardware configuration of the information viewing terminal Sequence diagram showing the flow of distance measurement processing between electric wire and ground in the information viewing terminal and the image analysis device The figure which shows an example of the processing equipment image at the time of completion of the distance measurement process between an electric wire and the ground Sequence diagram showing the flow of distance measurement processing between electric wires in the information viewing terminal and the image analysis device The figure which shows an example of the processing equipment image at the time of completion of the distance measurement process between electric wires A sequence diagram showing the flow of distance measurement processing between utility poles and wall surfaces in an information viewing terminal and an image analysis device. The figure which shows an example of the processing equipment image at the time of completion of the distance measurement process between a utility pole and a wall surface.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters and duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessary redundancy of the following description and to facilitate the understanding of those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

<Measurement system>
FIG. 1 is a configuration diagram showing an outline of the distance measuring system (distance measuring device) 1 of the present disclosure. As shown in FIG. 1, the distance measurement system 1 mainly includes a map database 2, an image acquisition device 3, an image analysis device 4, and a plurality of information viewing terminals 5. Each device 2-5 of the distance measurement system 1 may be connected to each other via a network 6 such as a dedicated line or a LAN (Local Area Network). Note that each device 2-5 may exchange information via a cloud server.

The image acquisition device 3 and the information viewing terminal 5 may be mounted on a patrol vehicle (hereinafter, simply referred to as a "vehicle"). The information viewing terminal 5 may be arranged in the vehicle and the management center that operates the distance measurement system 1, respectively. In the configuration diagram of FIG. 1, the image acquisition device 3 and the information viewing terminal 5 are mounted on separate vehicles, but the image acquisition device 3 and the information viewing terminal 5 may be mounted on the same vehicle. .. Further, the image acquisition device 3 and the information viewing terminal 5 may be carried by a worker who regularly patrols as a notebook computer or a tablet terminal.

Hereinafter, each device 2-5 of the distance measurement system 1 will be described in detail.

<Map database>
The map database 2 stores a digital map. In the digital map, the position of the utility pole may be indicated by an icon. Information indicating the position (latitude / longitude) of each utility pole on the digital map (hereinafter referred to as "utility pole position information") may be provided by a business operator or the like that owns the utility pole.

FIG. 2 is a diagram showing an example of a digital map 11 stored in the map database 2. In the example of FIG. 2, the road 12 and the railroad 13 are shown on the digital map 11, and a plurality of utility poles are indicated by utility pole icons 14 along the road 12. The display form of the color and shape of the utility pole icon 14 may be arbitrary.

<Image acquisition device>
The image acquisition device 3 uses a computer having a known configuration, a plurality of image pickup devices having a known imaging function (for example, a CMOS (Complementary Metal Oxide Semiconductor) image sensor or the like), a known GPS (Global Positioning System), or the like. It suffices to have a function to acquire the obtained position information. The image acquisition device 3 acquires an image (hereinafter referred to as “equipment image”) obtained by capturing an image of equipment including an electric pole and an electric wire in each of a plurality of imaging devices, and digitally captures the image of the equipment Information indicating the position (latitude / longitude) on the map (hereinafter referred to as "imaging position information") is acquired by GPS or the like. The plurality of imaging devices means not only the case where a plurality of separate imaging devices are used for imaging, but also the case where at least one imaging device is used for imaging from a plurality of locations. Further, the image acquisition device 3 calculates the distance from the reference point of each pixel in the equipment image and acquires the distance information. Then, the image acquisition device 3 creates image data by associating the image capture position information and the distance information with the equipment image, and transmits the image data to the image analysis device 4.

The equipment image may be captured while the vehicle equipped with the image acquisition device 3 is running, or may be captured while the vehicle is stopped and stationary. When the image acquisition device 3 is mounted on a vehicle and imaged from a road, the imaging position information indicating the position of the image acquisition device 3 (vehicle) on the digital map is the utility pole position information indicating the position of the utility pole on the digital map. Somewhat different.

FIG. 3 is a block diagram showing a hardware configuration of the image acquisition device 3. The image acquisition device 3 is a processor 21 that collectively executes each process, a RAM 22 that is a volatile memory that functions as a work area of the processor 21, and a non-volatile memory that stores a control program and data executed by the processor 21. A ROM 23, a storage unit 24 having a storage for storing programs and data necessary for the operation of the image acquisition device 3, a display unit 25 having a monitor for displaying information necessary for the user, a keyboard that enables the user's input operation, and the like. An input unit 26 having an input device such as a mouse, an imaging unit 27 having a plurality of imaging devices, a position information acquisition unit 28 that acquires position information by GPS or the like, and a communication unit having a communication module that executes communication via a network 6. It has 29 mag. The distance from the reference point of each pixel in the equipment image is calculated by the processor 21 executing a predetermined control program.

Each function of the image acquisition device 3 can be realized by the processor 21 executing a predetermined control program in the hardware configuration shown in FIG. At least a part of the function of the image acquisition device 3 may be replaced by processing by other known hardware.

FIG. 4 is a flow chart showing the flow of image acquisition processing in the image acquisition device 3.

First, in step ST101, the imaging unit 27 images the equipment including the utility pole and the electric wire, and the processor 21 acquires the equipment image. The acquired equipment image is stored in the storage unit 24.

Next, in step ST102, the position information acquisition unit 28 acquires the imaging position information indicating the position on the digital map of the image acquisition device 3 (that is, the vehicle) when the equipment image is captured. The acquired imaging position information is stored in the storage unit 24.

Next, in step ST103, the processor 21 calculates the distance from the reference point of each pixel in the equipment image and acquires the distance information. The acquired distance information is stored in the storage unit 24.

Next, in step ST104, the processor 21 creates image data by associating the equipment image with the imaging position information and the distance information. The created image data is stored in the storage unit 24.

Next, in step ST105, the communication unit 29 transmits the image data to the image analysis device 4. The image data is appropriately transmitted at a predetermined timing. Note that the image data may be stored in a recording medium such as a memory card without transmitting the image data, and the image analysis device 4 may acquire the image data from the memory card. In this case, it is not necessary to provide the communication unit 29 in the image acquisition device 3. Further, the image acquisition device 3 may transmit the identification information unique to the image acquisition device 3 to the image analysis device 4 together with the image pickup position information. As a result, the image analysis device 4 can acquire and manage the current position of the image acquisition device 3.

<Image analysis device>
The image analysis device 4 is composed of a computer having a known configuration. The image analysis device 4 stores image data received from the image acquisition device 3 and information on equipment including utility poles and electric wires (hereinafter referred to as "equipment data"). Further, the image analysis device 4 stores management data in which the imaging position information of the image data and the utility pole position information of the equipment data are linked.

Then, when the image analysis device 4 receives the equipment image request (hereinafter referred to as "equipment image request") from the information viewing terminal 5 together with the electric pole position information of the electric pillar designated by the user on the digital map, the image analysis device 4 receives. With reference to the image data, the equipment data, and the management data, the equipment image including the electric pole is extracted and transmitted to the information viewing terminal 5.

Further, when the image analysis device 4 receives a distance measurement request (hereinafter referred to as "distance measurement request") from the information viewing terminal 5, the image analysis device 4 uses image analysis to display the equipment displayed on the information viewing terminal 5. The shortest distance between objects specified on the image is measured, and the measurement result is transmitted to the information viewing terminal 5.

FIG. 5 is a block diagram showing a hardware configuration of the image analysis device 4. The image analysis device 4 is a processor 31 that collectively executes each process, a RAM 32 that is a volatile memory that functions as a work area of the processor 31, and a non-volatile memory that stores a control program and data executed by the processor 31. A ROM 33, a storage unit 34 having a storage for storing programs and data necessary for the operation of the image analysis device 4, a display unit 35 having a monitor for displaying information necessary for the user, a keyboard that enables the user's input operation, and the like. It includes an input unit 36 having an input device such as a mouse, a communication unit 37 having a communication module that executes communication via the network 6, and the like.

FIG. 6 is a block diagram showing a functional configuration of the image analysis device 4. As shown in FIG. 6, the image analysis device 4 includes an image data storage unit 41, an equipment data storage unit 42, a management data creation unit 43, a management data storage unit 44, an information cooperation unit 45, and an image information recognition. A unit 46, a distance measuring unit 47, and an image processing unit 48 are provided.

Each function of the image analysis device 4 shown in FIG. 6 is realized by the hardware configuration of the image analysis device 4 shown in FIG. For example, the management data creation unit 43, the information cooperation unit 45, the image information recognition unit 46, the distance measurement unit 47, and the image processing unit 48 are realized by the processor 31 executing a predetermined control program. Further, the image data storage unit 41, the equipment data storage unit 42, and the management data storage unit 44 are realized by the storage unit 34. Further, the communication between the image data storage unit 41 and the image acquisition device 3 and the communication between the information cooperation unit 45 and the information viewing terminal 5 are realized by the communication unit 37.

The image data storage unit 41 stores the image data transmitted from the image acquisition device 3. As described above, the image data includes equipment images, imaging position information (latitude / longitude on a digital map), and distance information. In this embodiment, the equipment image is JPG data. The data format of the equipment image may be a data format other than the JPG format.

FIG. 7 is a diagram showing an example of image data stored in the image data storage unit 41. As shown in FIG. 7, the image data includes an "image file name (equipment image)", "imaging position information", and "shooting date / time information". The distance information of each pixel of the equipment image is stored in the image file. In the example of FIG. 7, the image file name “1357.jpg” is associated with the imaging position information “x11, y12”. Further, the image file name "2468.jpg" is associated with the imaging position information "x21, y22". Further, the image file name "3578.jpg" is associated with the imaging position information "x31, y32".

The equipment data storage unit 42 stores the utility pole position information (latitude / longitude on the digital map) of the utility pole and the equipment information which is information on the specifications of the utility pole and other equipment installed on the utility pole. Stores equipment data, which is linked data. The utility pole is uniquely identified by the "business office name", "line name" and "telephone pole number".

FIG. 8 is a diagram showing an example of equipment data stored in the equipment data storage unit 42. As shown in FIG. 8, the equipment data includes "business office name", "railroad track name", "telephone pole number", "telephone pole position information" and "equipment information". The numerical value included in the "equipment information" in FIG. 8 indicates the number of the equipment. In the example of FIG. 8, the utility pole position information "x41, y42" and the equipment information "equipment A: 1, equipment B: 0," are attached to the utility pole with the business office name "A", the line name "AAA", and the utility pole number "123". Equipment C: 0 ”is linked. In addition, the utility pole position information "x51, y52" and the equipment information "equipment A: 0, equipment B: 1, equipment C: 1" are added to the utility pole with the business office name "B", the line name "BBB", and the utility pole number "456". "Is linked. In addition, the utility pole position information "x61, y62" and the equipment information "equipment A: 0, equipment B: 0, equipment C: 0" are added to the utility pole with the business office name "C", the line name "CCC", and the utility pole number "789". "Is linked. The equipment in which the number of installations is 0 may not be stored in the "equipment information".

In the example of FIG. 8, the number of installed facilities is shown as "equipment information", but the facility information can be various information of electric wires, utility poles and other facilities. Further, the equipment A, the equipment B, and the equipment C may be, for example, a switch, a transformer, an SVR (automatic voltage regulator), or the like.

The management data creation unit 43 generates management data by associating the imaging position information of the image data stored in the image data storage unit 41 with the electric pole position information of the equipment data stored in the equipment data storage unit 42. Then, it is stored in the management data storage unit 44.

FIG. 9 is a diagram showing an example of management data stored in the management data storage unit 44. As shown in FIG. 9, the management data includes "imaging position information" and "telephone pole position information".

When the information cooperation unit 45 receives the equipment image request together with the utility pole position information of the utility pole designated by the user on the digital map from the information viewing terminal 5, the information cooperation unit 45 refers to the management data stored in the management data storage unit 44. Then, the imaging position information corresponding to the received utility pole position information is specified. Further, the information cooperation unit 45 refers to the image data stored in the image data storage unit 41, reads out the equipment image corresponding to the specified imaging position information, and transmits it to the information viewing terminal 5.

When the image information recognition unit 46 receives a distance measurement request and information indicating the pixel positions of two objects on the equipment image (hereinafter referred to as "pixel position information") from the information viewing terminal 5, the image of the equipment image. The position of each object is specified by performing the analysis, and the position information is output to the distance measuring unit 47.

The distance measuring unit 47 measures the distance between the objects based on the position information of each object input from the image information recognition unit 46, and outputs the measurement result to the image processing unit 48. A specific example of distance measurement will be described later.

The image processing unit 48 performs processing to add information such as a measurement result output from the distance measuring unit 47 to the equipment image of the image data stored in the image data storage unit 41. Hereinafter, the equipment image after processing will be referred to as a "processing equipment image". The image processing unit 48 transmits the processing equipment image to the information viewing terminal 5.

<Information viewing terminal>
The information viewing terminal 5 is a known display device having a display screen, such as a tablet terminal, a smartphone terminal, or a personal computer terminal. The information viewing terminal 5 can display a digital map stored in the map database 2 on the display screen. Further, the information viewing terminal 5 transmits an equipment image request requesting transmission of an equipment image including the electric pole to the image analysis device 4 due to a user's instruction to select an electric pole on the digital map, thereby displaying a display screen. The equipment image received from the image analysis device 4 can be displayed on the top.

Further, the information viewing terminal 5 transmits a distance measurement request to the image analysis device 4 due to a user's instruction, and further transmits pixel position information of two objects designated by the user to the image analysis device 4. As a result, the processing equipment image received from the image analysis device 4 can be displayed on the display screen.

Further, the information viewing terminal 5 can display the equipment image or the processing equipment image on the display screen in three dimensions. Further, the information viewing terminal 5 can change the viewpoint of the three-dimensional display based on the instruction from the user. As a result, the user of the information viewing terminal 5 can move the viewpoint with respect to the processing equipment image and confirm whether or not the measurement point is correct.

FIG. 10 is a block diagram showing a hardware configuration of the information viewing terminal 5. The information viewing terminal 5 is a processor 61 that collectively executes each process, a RAM 62 that is a volatile memory that functions as a work area of the processor 61, and a non-volatile memory that stores a control program and data executed by the processor 61. A ROM 63, a storage unit 64 having a storage for storing programs and data necessary for the operation of the information viewing terminal 5, a display unit 65 having a monitor for displaying information necessary for the user, a keyboard that enables the user's input operation, and the like. It includes an input unit 66 having an input device such as a mouse, a communication unit 67 having a communication module that executes communication via the network 6, and the like. The display unit 65 and the input unit 66 may be configured as a touch panel display.

Each function of the information viewing terminal 5 can be realized by the processor 61 executing a predetermined control program in the hardware configuration shown in FIG. At least a part of the function of the information viewing terminal 5 may be replaced by processing by other known hardware.

<Specific example of distance measurement>
Next, a specific example of distance measurement by the image analysis device 4 of the present embodiment will be described with reference to the drawings.

(1) Between electric wire and ground First, the distance measurement between electric wire and ground will be described. FIG. 11 is a sequence diagram showing the flow of the distance measurement process between the electric wire and the ground in the information viewing terminal 5 and the image analysis device 4.

As a premise, it is assumed that the equipment image including the electric wire to be measured and the ground is displayed on the display screen of the information viewing terminal 5, and the distance measurement request is transmitted from the information viewing terminal 5 to the image analysis device 4.

First, in step ST201, in the information viewing terminal 5, the user designates three or more points on the electric wire of the display screen.

Next, in step ST202, the information viewing terminal 5 transmits the pixel position information of each point specified in step ST201 to the image analysis device 4.

Next, in step ST203, the image analysis device 4 performs image analysis of the equipment image based on the distance information of the image data and the pixel position information received in step ST202, so that each point on the electric wire designated by the user. Specify the position (three-dimensional coordinates) of.

Next, in step ST204, the image analysis device 4 calculates a pseudo curve passing through all the points whose positions are specified in step ST203. This pseudo curve represents an electric wire.

Next, in step ST205, in the information viewing terminal 5, three or more points are designated by the user on the ground of the display screen.

Next, in step ST206, the information viewing terminal 5 transmits the pixel position information of each point specified in step ST205 to the image analysis device 4.

Next, in step ST207, the image analysis device 4 performs image analysis of the equipment image based on the distance information of the image data and the pixel position information received in step ST206, so that each point on the ground designated by the user. Specify the position (three-dimensional coordinates) of.

Next, in step ST208, the image analysis device 4 calculates a plane including all the points whose positions are specified in step ST207. This plane represents the ground.

Next, in step ST209, the image analysis device 4 calculates the shortest distance between the pseudo curve calculated in step ST204 and the plane calculated in step ST208. This shortest distance represents the distance between the electric wire and the ground.

Next, in step ST210, the image analysis device 4 adds information indicating the pseudo curve calculated in step ST204, the plane calculated in step ST208, and the distance calculated in step ST209 to the equipment image. By doing so, a processing equipment image is generated.

Next, in step ST211 the image analysis device 4 transmits the processing equipment image generated in step ST210 to the information viewing terminal 5.

Next, in step ST212, the information viewing terminal 5 displays the processing equipment image received in step ST211 on the display screen.

FIG. 12 is a diagram showing an example of a processing equipment image at the time of completion of the distance measurement process between the electric wire and the ground. In the example of FIG. 12, it is assumed that the user of the information viewing terminal 5 specifies three points P11, P12, P13 on the electric wire and three points P21, P22, P23 on the ground on the equipment image.

In this case, the image analysis device 4 calculates the pseudo-curve L11 and the plane F21, and further calculates the shortest distance D31 between the pseudo-curve L11 and the plane F21. Then, the image analysis device 4 generates a processing equipment image in which the pseudo curve L11, the plane F21, and the distance D31 are added to the equipment image, and transmits the processing equipment image to the information viewing terminal 5. As a result, the information viewing terminal 5 displays the processing equipment image shown in FIG. 12 on the display screen.

The image analysis device 4 may add a straight line D32 indicating the distance D31, an intersection P31 between the pseudo curve L11 and the straight line D32, and an intersection P32 between the plane F21 and the straight line D32 to the equipment image.

(2) Between electric wires Next, measuring the distance between electric wires will be described. FIG. 13 is a sequence diagram showing a flow of distance measurement processing between electric wires in the information viewing terminal 5 and the image analysis device 4.

As a premise, an image of equipment including the first electric wire and the second electric wire to be measured is displayed on the display screen of the information viewing terminal 5, and a distance measurement request is transmitted from the information viewing terminal 5 to the image analysis device 4. It shall be.

First, in step ST301, in the information viewing terminal 5, the user designates three or more points on the first electric wire of the display screen.

Next, in step ST302, the information viewing terminal 5 transmits the pixel position information of each point specified in step ST301 to the image analysis device 4.

Next, in step ST303, the image analysis device 4 performs image analysis of the equipment image based on the distance information of the image data and the pixel position information received in step ST302 on the first electric wire designated by the user. Specify the position (three-dimensional coordinates) of each point.

Next, in step ST304, the image analysis device 4 calculates a first pseudo-curve passing through all the points whose positions are specified in step ST303. This first pseudo curve represents the first electric wire.

Next, in step ST305, in the information viewing terminal 5, the user designates three or more points on the second electric wire of the display screen.

Next, in step ST306, the information viewing terminal 5 transmits the pixel position information of each point specified in step ST305 to the image analysis device 4.

Next, in step ST307, the image analysis device 4 performs image analysis of the equipment image based on the distance information of the image data and the pixel position information received in step ST306 on the second electric wire designated by the user. Specify the position (three-dimensional coordinates) of each point.

Next, in step ST308, the image analysis device 4 calculates a second pseudo-curve passing through all the points whose positions are specified in step ST307. This second pseudo curve represents the second electric wire.

Next, in step ST309, the image analysis device 4 calculates the shortest distance between the first pseudo-curve calculated in step ST304 and the second pseudo-curve calculated in step ST308. This shortest distance represents the distance between electric wires.

Next, in step ST310, the image analysis device 4 has the first pseudo-curve calculated in step ST304, the second pseudo-curve calculated in step ST308, and the distance calculated in step ST309 with respect to the equipment image. A processing equipment image is generated by adding the information indicating.

Next, in step ST311 the image analysis device 4 transmits the processing equipment image generated in step ST310 to the information viewing terminal 5.

Next, in step ST312, the information viewing terminal 5 displays the processing equipment image received in step ST311 on the display screen.

FIG. 14 is a diagram showing an example of a processing equipment image at the time of completion of the distance measurement process between electric wires. In the example of FIG. 14, the user of the information viewing terminal 5 specifies three points P41, P42, P43 on the first electric wire and three points P51, P52, P53 on the second pseudo curve on the equipment image. To do.

In this case, the image analysis device 4 calculates the first pseudo-curve L41 and the second pseudo-curve L51, and further calculates the shortest distance D61 between the first pseudo-curve L41 and the second pseudo-curve L51. Then, the image analysis device 4 generates a processing equipment image in which the first pseudo curve L41, the second pseudo curve L51, and the distance D61 are added to the equipment image, and transmits the processing equipment image to the information viewing terminal 5. As a result, the information viewing terminal 5 displays the processing equipment image shown in FIG. 14 on the display screen.

Even if the image analysis device 4 adds a straight line D62 indicating the distance D61, an intersection P61 between the first pseudo-curve L41 and the straight line D62, and an intersection P62 between the second pseudo-curve L51 and the straight line D62 to the equipment image. Good.

(3) Between utility pole and wall surface Next, the distance measurement between the utility pole and wall surface will be described. FIG. 15 is a sequence diagram showing the flow of the distance measurement process between the utility pole and the wall surface in the information viewing terminal 5 and the image analysis device 4.

As a premise, it is assumed that an equipment image including a utility pole and a wall surface to be measured is displayed on the display screen of the information viewing terminal 5, and a distance measurement request is transmitted from the information viewing terminal 5 to the image analysis device 4.

First, in step ST401, in the information viewing terminal 5, one point of the utility pole on the display screen is designated by the user.

Next, in step ST402, the information viewing terminal 5 transmits the pixel position information of the point specified in step ST401 to the image analysis device 4.

Next, in step ST403, the image analysis device 4 performs image analysis of the equipment image based on the distance information of the image data and the pixel position information received in step ST402, so that the point on the electric pole designated by the user Specify the position (three-dimensional coordinates).

Next, in step ST404, in the information viewing terminal 5, three or more points are designated by the user on the wall surface of the display screen.

Next, in step ST405, the information viewing terminal 5 transmits the pixel position information of each point specified in step ST404 to the image analysis device 4.

Next, in step ST406, each point on the wall surface designated by the user by the image analysis device 4 performing image analysis of the equipment image based on the distance information of the image data and the pixel position information received in step ST405. Specify the position (three-dimensional coordinates) of.

Next, in step ST407, the image analysis device 4 calculates a plane including all the points whose positions are specified in step ST406. This plane represents the wall surface.

Next, in step ST408, the image analysis device 4 calculates the shortest distance between the point specified in step ST403 and the plane calculated in step ST407. This shortest distance represents the distance between the utility pole and the wall surface.

Next, in step ST409, the image analysis device 4 adds information indicating the point specified in step ST403, the plane calculated in step ST407, and the distance calculated in step ST408 to the equipment image. By doing so, a processing equipment image is generated.

Next, in step ST410, the image analysis device 4 transmits the processing equipment image generated in step ST409 to the information viewing terminal 5.

Next, in step ST411, the information viewing terminal 5 displays the processing equipment image received in step ST410 on the display screen.

FIG. 16 is a diagram showing an example of a processing equipment image at the time of completion of the distance measurement process between the utility pole and the wall surface. In the example of FIG. 16, it is assumed that the user of the information viewing terminal 5 designates one point P71 on the utility pole and three points P81, P82, and P83 on the wall surface on the equipment image.

In this case, the image analysis device 4 identifies the position of the point P71, calculates the plane F81, and further calculates the shortest distance D91 between the point 71 and the plane 81. Then, the image analysis device 4 generates a processing equipment image in which the point P71, the plane F81, and the distance D91 are added to the equipment image, and transmits the processing equipment image to the information viewing terminal 5. As a result, the information viewing terminal 5 displays the processing equipment image shown in FIG. 16 on the display screen.

The image analysis device 4 may add a straight line D92 indicating the distance D91 and an intersection P91 between the plane F81 and the straight line D92 to the equipment image.

<Effect>
As described above, according to the present embodiment, when measuring the distance between the electric wire and the ground by image analysis, the positions of the electric wire and the ground are specified based on the position designation of three or more points. Further, when measuring the distance between electric wires by image analysis, the position of at least one electric wire is specified based on the position designation of three or more points. Further, when measuring the distance between the utility pole and the wall surface by image analysis, the position of the wall surface is specified based on the position designation of three or more points. As a result, easy and accurate distance measurement is possible, and work in regular patrols can be made more efficient.

<Variation>
In the above description, the map database 2, the image acquisition device 3, the image analysis device 4, and the information viewing terminal 5 have been described as independent devices, but the present disclosure is not limited to this, and for example, the image analysis device 4 and information viewing are described. The terminal 5 may be integrated.

Further, in the present embodiment, the distance measuring unit 47 may store the measurement result in the equipment data storage unit 42 in association with the information of the object to be measured (for example, the utility pole number and the line name). Further, the image processing unit 48 may associate the processing equipment image with the equipment image before processing and store it in the image data storage unit 41. As a result, the user of the information viewing terminal 5 can confirm the result of the distance measurement performed in the past.

Further, in the present embodiment, an example of linking the utility pole position information and the imaging position information in the image analysis device 4 has been described, but the present invention is not limited to this, and highly accurate GPS information (satellite Michibiki, etc.) is used. In such a case, the image acquisition device 3 can link the utility pole position information and the imaging position information at the time of shooting.

Although various embodiments have been described above with reference to the drawings, it goes without saying that the present disclosure is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present disclosure. Understood. In addition, each component in the above embodiment may be arbitrarily combined as long as the purpose of disclosure is not deviated.

In each of the above embodiments, the present disclosure has been described for an example of configuring using hardware, but the present disclosure can also be realized by software in cooperation with hardware.

Further, each functional block used in the description of the above embodiment is typically realized as an LSI which is an integrated circuit. The integrated circuit may control each functional block used in the description of the above embodiment and include an input and an output. These may be individually integrated into one chip, or may be integrated into one chip so as to include a part or all of each functional block. Although it is referred to as LSI here, it may be referred to as IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.

Further, the method of making an integrated circuit is not limited to LSI, and may be realized by using a dedicated circuit or a general-purpose processor. An FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and settings of circuit cells inside the LSI may be used.

Furthermore, if an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology or another technology derived from it, it is naturally possible to integrate functional blocks using another technology. The application of biotechnology, etc. is possible.

It should be noted that the present disclosure can be expressed as a control method executed in a wireless communication device or a control device. The present disclosure can also be expressed as a program for operating such a control method by a computer. Further, the present disclosure can also be expressed as a recording medium in which such a program is recorded in a state in which it can be read by a computer. That is, the present disclosure can be expressed in any category of devices, methods, programs, and recording media.

Further, the present disclosure is not limited to the above-described embodiment in terms of the type, arrangement, number, etc. of the members, and deviates from the gist of the invention, such as appropriately replacing the constituent elements with those having the same effect and effect. It can be changed as appropriate to the extent that it does not.

The present disclosure is suitable for use in a distance measuring device, a distance measuring method, and a distance measuring program for measuring the shortest distance between an equipment and an object.

1 Distance measurement system 2 Map database 3 Image acquisition device 4 Image analysis device 5 Information viewing terminal 6 Network

Claims (8)

Display means for displaying equipment images of equipment including utility poles and electric wires captured by using multiple imaging devices on the screen.
A measuring means for measuring the distance between the electric wire and the ground, the distance between the electric wires, or the distance between the utility pole and the wall surface in the equipment image.
Equipped with
The measuring means is
When measuring the distance between the electric wire and the ground, the position of the electric wire and the ground is specified.
When measuring the distance between the wires, specify the position of at least one of the wires.
When measuring the distance between the utility pole and the wall surface, the position of the wall surface is specified.
It is performed based on the position designation of three or more points by the user with respect to the equipment image displayed on the screen.
Distance measuring device. The display means
A three-dimensional display of the equipment image is performed, and when the position is specified, the viewpoint of the three-dimensional display is changed based on an instruction from the user.
The distance measuring device according to claim 1. The display means
By the user's designation for the utility pole icon arranged on the map data displayed on the screen, the equipment image including the designated utility pole is displayed on the screen.
The distance measuring device according to claim 1 or 2. The measuring means is
When measuring the distance between the electric wire and the ground
A pseudo-curve passing through all the points on the wire positioned by the user is calculated.
Calculate a plane that passes through all the points on the ground positioned by the user.
Calculate the shortest distance between the pseudo-curve and the plane,
The distance measuring device according to any one of claims 1 to 3. The measuring means is
When measuring the distance between the wires
A first pseudo-curve passing through all the points on one of the wires positioned by the user was calculated.
A second pseudo-curve passing through all the points on the other wire positioned by the user was calculated.
The shortest distance between the first pseudo-curve and the second pseudo-curve is calculated.
The distance measuring device according to any one of claims 1 to 4. The measuring means is
When measuring the distance between the electric wire and the ground
A plane passing through all the points on the wall surface designated by the user is calculated.
Calculate the shortest distance between one point on the utility pole and the plane.
The distance measuring device according to any one of claims 1 to 5. Equipment images of equipment including utility poles and electric wires captured using multiple imaging devices are displayed on the screen.
Upon receiving a request from the user to measure the distance between the electric wire and the ground, the distance between the electric wires, or the distance between the utility pole and the wall surface in the equipment image,
Measure the distance in response to the request.
It ’s a distance measurement method.
When measuring the distance between the electric wire and the ground, the position of the electric wire and the ground is specified.
When measuring the distance between the wires, specify the position of at least one of the wires.
When measuring the distance between the utility pole and the wall surface, the position of the wall surface is specified.
It is performed based on the position designation of three or more points by the user with respect to the equipment image displayed on the screen.
Distance measurement method. A step of displaying an equipment image of equipment including utility poles and electric wires captured by using multiple imaging devices on the screen, and
A step of receiving a request from a user for measuring the distance between the electric wire and the ground, the distance between the electric wires, or the distance between the utility pole and the wall surface in the equipment image.
The step of measuring the distance in response to the request and
Is a distance measurement program for causing a distance measurement system to execute
When measuring the distance between the electric wire and the ground, the position of the electric wire and the ground is specified.
When measuring the distance between the wires, specify the position of at least one of the wires.
When measuring the distance between the utility pole and the wall surface, the position of the wall surface is specified.
It is performed based on the position designation of three or more points by the user with respect to the equipment image displayed on the screen.
Distance measurement program.

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