Display divice, display method and program

Abstract

To provide a display device, a display method, and a program that allow a pipeline state and a position corresponding to the pipeline state to be easily referenced.SOLUTION: A display device comprises display means 10E for displaying, on a display part 2, a map of a region including a location where a pipeline is installed, and the display means 10E displays information relating to a state of the pipeline at a predetermined position, at a position corresponding to the predetermined position on the map.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a display device, a display method, and a program. [Background technology]

[0002] Conventionally, the condition of underground pipelines has been diagnosed from above ground without excavation. For example, Patent Document 1 discloses a method for detecting the location of damage to the corrosion-protective coating of buried metal pipes, in which a signal current is passed from a measurement signal transmitter between a damaged portion of the corrosion-protective coating of a metal pipe that is buried underground and has an outer surface coated with a corrosion-protective coating and a counter electrode buried in the ground, and a potential difference on the ground surface is detected by two wheel electrodes of a receiving device that moves on the ground surface directly above the metal pipe, and a signal with the same components as the signal current components is extracted, and changes in the amplitude and phase polarity of the potential difference are measured to detect a unique waveform created by the damaged portion of the corrosion-protective coating of the buried metal, thereby detecting the damage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4106202 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for diagnostic results of the condition of an underground pipeline to be easily referred to, including the condition of the pipeline and the location corresponding to the condition of the pipeline.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide a display device, a display method, and a program that allow easy reference to the state of a pipeline and the position corresponding to the state of the pipeline. [Means for solving the problem]

[0006] A display device according to one aspect of the present disclosure includes a display means for displaying a map of an area including a location where a pipeline is laid on a display unit, and the display means displays information regarding the condition of the pipeline at a predetermined position on the map at a position corresponding to the predetermined position. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a display device, a display method, and a program that allow easy reference to the state of a pipeline and the position corresponding to the state of the pipeline. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of diagnosis of an underground pipeline. [Figure 2] 1 is a block diagram of a display device according to an embodiment. [Figure 3] FIG. 2 is a block diagram of a control unit included in the display device. [Figure 4] 1 is a first example of a screen displayed on a display unit by a display device. [Figure 5] 10 is a second example of a screen displayed on the display unit by the display device. DETAILED DESCRIPTION OF THE INVENTION

[0009] A display device, a display method, and a program according to an embodiment of the present disclosure will be described below with reference to the drawings. The display device according to this embodiment is used to refer to the results of trenchless diagnosis of the condition of a pipeline at a predetermined position laid underground from above ground, or to create data to refer to the diagnosis results of the pipeline.

[0010] In this embodiment, the state of the pipeline refers to an abnormality in the pipeline detected by a diagnosis of the pipeline. The pipeline condition includes, for example, a condition related to damage to the corrosion protection coating of the pipeline, i.e., the above-described pipeline diagnosis detects damage to the corrosion protection coating of the pipeline. The pipeline condition includes, for example, a condition regarding whether or not the pipeline is in contact with an underground object other than the pipeline laid underground. That is, the above-mentioned pipeline diagnosis detects whether or not the pipeline is in contact with another underground object. In this embodiment, the predetermined position in the pipeline refers to a position in the pipeline where each of the above states is detected, that is, a position corresponding to the state of the pipeline.

[0011] (Pipeline diagnosis) Figure 1 is a schematic diagram of the diagnosis of an underground pipeline PL. As shown in FIG. 1, a measurement signal transmitter TL and a receiver LC are used to diagnose a pipeline PL. The measurement signal transmitter TL generates an AC signal current. As shown in FIG. 1 , the measurement signal transmitter TL includes a counter electrode TLa and a current-carrying cable EC. The counter electrode TLa is disposed underground (inside the soil). The current-carrying cable EC is connected to a portion of the pipeline PL. The counter electrode TLa and the current-carrying cable EC are each connected to the measurement signal transmitter TL. The measurement signal transmitter TL applies an AC voltage between the pipeline PL and the counter electrode TLa, which are connected via the current-carrying cable EC, to pass an AC current. In this embodiment, the potential difference between an arbitrary point on the pipeline PL and the ground when an AC voltage is applied between the pipeline PL and the counter electrode TLa is referred to as the ground potential. The ground potential can be measured, for example, using measurement cables (not shown) that are arranged at multiple locations on the pipeline PL at approximately equal intervals and connected to the pipeline PL. The measurement cables are arranged, for example, at intervals along the entire length of the pipeline PL. The measurement cables may be connected, for example, to manholes (not shown) that are arranged at intervals on the pipeline PL. The earth potential is related to electrical constants such as the electrical resistance and reactance of the pipeline PL and the corrosion protection coating, and normally attenuates the farther away it is from the measurement signal transmitter TL.

[0012] The receiver LC detects the potential difference on the ground surface using the wheel electrode LCa in contact with the ground surface. If the pipeline PL has, for example, a damaged portion D in the corrosion protective coating or a contact portion T with another underground buried object UO, a current I flows into the pipeline PL via the damaged portion D of the corrosion protective coating or the contact portion T. This causes a relatively large potential difference around the damaged portion D of the corrosion protective coating or the contact portion T. The corrosion protection coating of the underground pipeline PL is diagnosed by detecting the potential difference thus generated on the ground surface using the receiver LC. For example, the receiving device LC is used to measure the earth potential between a measurement cable at an arbitrary location on the pipeline PL and an electrode (not shown) installed on the ground at an arbitrary location to serve as a potential reference, and the distribution of the earth potential at that location on the pipeline PL is calculated. This makes it possible to calculate the earth potential Vp at the damaged portion D of the corrosion protective coating. The earth potential Vp at the damaged portion D of the corrosion protective coating thus determined is used, for example, to calculate the area of ​​the damaged portion D of the corrosion protective coating (details will be described later).

[0013] When referring to the above-mentioned diagnosis results of the pipeline PL, it is preferable that the overall situation of the pipeline PL and the local situation of the pipeline PL can be easily grasped. In this case, if a map for checking the overall situation of the pipeline and a map for checking the local situation of the pipeline are separately prepared as in the past, the effort of registering and referring to the diagnosis results of the pipeline increases. The display device according to this embodiment includes the following components, which contribute to reducing the user's effort in registering and referencing the diagnosis results of the pipeline PL.

[0014] (display device) A display device 1 according to this embodiment will be described. FIG. 2 is a block diagram of the display device 1 according to the embodiment. FIG. 3 is a block diagram of the control unit 10 included in the display device 1. As shown in FIG. FIG. 4 shows a first example of a screen displayed on the display unit 2 by the display device 1. In FIG. FIG. 5 shows a second example of a screen displayed on the display unit 2 by the display device 1. In FIG. The display device 1 is used to register and refer to the diagnosis results of the pipeline PL. Specifically, the display device 1 receives input of various information related to the diagnosis of the pipeline PL from the control unit 10 shown in FIG. 2 or 3, and displays the information on the display unit 2.

[0015] 2, the display device 1 includes a control unit 10 having a processor 11 such as a CPU (Central Processing Unit) and a memory 12 connected by a bus, and executes a display program. The display program is a program that controls the operation of each functional unit of the display device 1. In other words, the display program is a program that causes a computer to function as the display device according to this embodiment. By executing the display program, the display device 1 functions as a device including the control unit 10 and a storage unit 20.

[0016] More specifically, in the display device 1, the processor 11 reads a display program stored in the storage unit 20 and stores the read display program in the memory 12. The processor 11 executes the display program stored in the memory 12, causing the display device 1 to function as a device including the control unit 10 and the storage unit 20. The storage unit 20 is configured using a non-transitory computer-readable storage medium device such as a magnetic hard disk drive or a semiconductor storage device. The storage unit 20 stores various information related to the display device 1. For example, the storage unit 20 stores a display program in advance. The storage unit 20 may also store information related to the map M and information related to the state of the pipeline PL displayed in the list L.

[0017] In this embodiment, the display unit 2 may be included in the display device 1, or may be configured separately from the display device 1. In this embodiment, the display unit 2 is configured separately from the display device 1. The display unit 2 is, for example, a known display. That is, the display unit 2 is configured to include, for example, a CRT (Cathode Ray Tube) display, a liquid crystal display, an organic EL (Electro-Luminescence) display, etc. The display unit 2 may also be, for example, a known PC display or a touch panel.

[0018] After receiving input of various information related to the diagnosis of the pipeline PL, the display device 1 displays a map M and a list L on the display unit 2, as shown in FIG. 4 or FIG. The map M visually displays the location where the pipeline PL is laid, a predetermined position DP of the pipeline PL, and the like. In addition, for the pipeline PL displayed on the map M, a reference position RP is set, for example, by the user. The reference position RP is set by the user at an arbitrary point on the route of the pipeline PL. In this embodiment, the reference position RP is used to manage the predetermined position DP of the pipeline PL. The method for setting the reference position RP and the details of the information displayed on the map M will be described later.

[0019] The list L is a list of information related to the state of the pipeline PL at a predetermined position DP. For example, as shown in FIG. 4 or 5, the list L displays the distance from the reference position RP to the predetermined position DP, the potential difference measured on the ground surface at the predetermined position DP, the earth potential Vp at the predetermined position DP, and the area of ​​damage to the corrosion protection coating of the pipeline PL. In addition, the list L may display the earth cover at the predetermined position DP of the pipeline PL, the thickness of the corrosion protection coating of the pipeline PL, the diameter of the pipeline PL, and links for displaying site photographs and detailed maps of the predetermined position DP, etc. To display these, the list L may be horizontally scrollable on the display unit 2, for example. The earth potential Vp at a predetermined position DP is calculated by a known method of deriving a regression line or by a regression line formula based on the earth potential Vpx measured at an arbitrary reference position RPx, the earth potential Vpy measured at a reference position RPy closest to the predetermined position DP, and the distance from each reference position RP to the predetermined position DP. Note that the arbitrary reference position RP and the reference position RP closest to the predetermined position DP may be different reference positions. As mentioned above, the earth potential is the potential difference between the pipeline PL and the ground surface. For example, the status at each of a plurality of predetermined positions DP may be displayed in a list in the list L. Details of each of the above-mentioned information displayed in the list L will be described later.

[0020] In this embodiment, the information about the map M and the information about the state of the pipeline PL displayed in the list L are acquired by the display device 1 from outside, for example, before being displayed on the display unit 2. Alternatively, each piece of information described above may be pre-stored in the display device 1. In this embodiment, the display device 1 also accepts input of various pieces of information, but the display device 1 may also function as a device that simply displays the stored information.

[0021] (Configuration of control unit) Each component included in the control unit 10 according to this embodiment will be described. As shown in FIG. 3, the control unit 10 of the display device 1 includes a map acquisition unit 10A, a registration unit 10B, an information acquisition unit 10C, an area calculation unit 10D, a display unit 10E, and a data output unit 10F.

[0022] (Map Acquisition Department) The map acquisition unit 10A acquires a map M to be displayed on the display unit 2. The map acquisition unit 10A acquires the map M of the area around the location where the pipeline PL is laid, for example, by downloading it from the Internet. When downloading the map M from the Internet, for example, a well-known GIS (Geographic Information System) is preferably used. The map acquisition unit 10A may acquire map data of the area around the location where the pipeline PL is laid, for example, from map data that is available offline.

[0023] In this embodiment, the map M acquired by the map acquisition unit 10A and displayed on the display unit 2 has a relatively large scale for the area near the location where the pipeline PL is laid. This allows the user to check the geographic information of the area where the pipeline PL is laid in detail. The map M for areas relatively far from the area where the pipeline PL is laid has a relatively small scale. This reduces the amount of geographic information for areas relatively far from the area where the pipeline PL is laid. By configuring the map acquired by the map acquisition unit 10A as described above, it is possible to reduce the amount of data in the acquired map M while providing sufficient geographical information on the location where the pipeline PL is laid. Note that the scale of the map M acquired by the map acquisition unit 10A may be arbitrarily set by the user.

[0024] In this embodiment, the vicinity of the location where the pipeline PL is laid refers to, for example, within a square area on the map M that contains at least the entire pipeline PL. A location relatively far from the location where the pipeline PL is laid refers to, for example, outside the square area. The size of the square is determined appropriately by, for example, the user. Alternatively, the size of the square may be automatically determined by the display device 1, for example, by the user inputting only the position information of the start point and end point of the pipeline PL in advance. Furthermore, the fact that the scale of the map M of a predetermined area is relatively large means that map data for the predetermined area has been acquired in such detail that the map M can be displayed even if the scale is increased. On the other hand, the fact that the scale of the map M of a predetermined area is relatively small means that map data for the predetermined area has not been acquired in such detail that the scale of the map M cannot be increased.

[0025] (Registration Department) The registration unit 10B registers the location where the pipeline PL is laid on the map M acquired by the map acquisition unit 10A. The registration unit 10B acquires, for example, information related to the location where the pipeline PL is laid from information input by the user. That is, the registration unit 10B accepts information related to the location where the pipeline PL is laid, input by the user. Then, the registration unit 10B registers the route of the pipeline PL in association with the map M based on the location where the pipeline PL is laid, input by the user.

[0026] (Information acquisition department) The information acquiring unit 10C acquires information about the state of the pipeline PL. For example, the information acquiring unit 10C acquires information about the state of the pipeline PL from information input by a user. That is, the information acquiring unit 10C accepts information about the state of the pipeline PL input by a user. Details of the information about the state of the pipeline PL will be described later. In this embodiment, various inputs by the user to the display device 1, i.e., input of information about the map M to the registration unit 10B and input of information about the state of the pipeline PL to the information acquisition unit 10C, are made via the input unit 3. The input unit 3 is an input interface such as a keyboard, a mouse, or a touch panel, for example.

[0027] (Information acquired by the information acquisition unit) The information about the state of the pipeline PL that is input by the user and acquired by the information acquisition unit 10C will be described below. Hereinafter, this information will be referred to as information input by the user. The information input by the user includes, for example, information about the distance from the reference position RP to the predetermined position DP. As described above, the state of the pipeline PL is detected by the receiving device LC shown in FIG. 1 by measuring the potential difference at the ground surface. The user records the state of the pipeline PL detected as described above in association with a position on the pipeline PL. At this time, the user inputs the distance from the reference position RP to the predetermined position DP. The distance from the reference position RP to the predetermined position DP is, for example, an actual measurement value at the site where the pipeline PL is laid. This allows the control unit 10 to manage the predetermined position DP on the pipeline PL based on the distance from the reference position RP. In this embodiment, the user may input, for example, the distance from the reference position RP to the predetermined position DP as a relative value. That is, for example, if the predetermined position DP is located closer to the start point of the pipeline PL than the reference position RP, the user may input the distance from the reference position RP to the predetermined position DP as a negative value. Also, if the predetermined position DP is located closer to the end point of the pipeline PL than the reference position RP, the user may input the distance from the reference position RP to the predetermined position DP as a positive value.

[0028] Information regarding the distance from the reference position RP to the predetermined position DP input by the user is displayed as a numerical value in, for example, a list L displayed on the display unit 2. At this time, the information regarding the distance input by the user may be displayed as a relative value input by the user in the list L shown in FIG. 4 or FIG. 5. In the example shown in FIG. 4 or FIG. 5, the distance from the reference position RP to the predetermined position DP is displayed as a negative value for detection Nos. 1 and 2, and as a positive value for detection Nos. 3 and 4. Alternatively, the information regarding the distance from the reference position RP to the predetermined position DP may be displayed geometrically on the map M displayed on the display unit 2. That is, the information regarding the distance from the reference position RP to the predetermined position DP may be made understandable based on the scale of the map M by simultaneously displaying the positions of the predetermined position DP and the reference position RP on the map M. At this time, on the map M displayed on the display unit 2, the information regarding the distance input by the user may be appropriately displayed at a location on the map M corresponding to the predetermined position DP based on the scale of the map M (details will be described later).

[0029] The information input by the user further includes a potential difference measured at the ground surface at a predetermined position DP of the pipeline PL and a potential Vp relative to the ground at the predetermined position DP. In this embodiment, the information is recorded in association with the predetermined position DP. That is, the user inputs information about the applied voltage by the measurement signal transmitter TL and the measurement data of the potential difference by the receiver LC when the state of the pipeline PL is detected at a predetermined position DP, which allows, for example, the area calculation unit 10D (described later) to calculate the area of ​​damage to the corrosion-resistant coating of the pipeline PL.

[0030] The information input by the user includes at least one of a site photograph and a detailed map at the predetermined position DP, and an area of ​​damage to the corrosion protection coating of the pipeline PL. In this embodiment, the information is recorded in association with the predetermined position DP. The on-site photograph is, for example, a photograph taken by a user at the actual installation location of the pipeline PL. The detailed map is, for example, a drawing relating to the laying of the pipeline PL, a residential map, or the like, used during the construction of the pipeline PL. The area of ​​damage to the corrosion protection coating of the pipeline PL is calculated, for example, by the area calculation unit 10D, which will be described next. The information acquiring unit 10C may acquire information including, for example, the reference position RP in the pipeline PL in addition to the information about the state of the pipeline PL.

[0031] (Display device operating mode) When the registration unit 10B accepts input of the path of the pipeline PL, the operation mode of the display device 1 may be a path reception mode. When the information acquisition unit 10C accepts input of information related to the state of the pipeline PL, the operation mode of the display device 1 may be an information reception mode. Switching between the path reception mode and the information reception mode may be performed, for example, by the display device 1 accepting an instruction input from the user to switch modes. The details of switching the operation mode of the display device 1 will be described later.

[0032] (Area calculation part) The area calculation unit 10D calculates the area of ​​damage to the corrosion protective coating of the pipeline PL by using information about the state of the pipeline PL. In this embodiment, the area calculation unit 10D calculates the area of ​​damage to the corrosion protective coating of the pipeline PL by a known formula using, for example, the potential difference measured on the ground surface at the predetermined position DP, the earth potential Vp at the predetermined position DP, the earth cover at the predetermined position DP of the pipeline PL, the thickness of the corrosion protective coating of the pipeline PL, the diameter of the pipeline PL, etc., which are input by the user as described above.

[0033] (Display means) The display means 10E displays various information related to the diagnosis of the pipeline PL on the display unit 2. This allows the user to refer to various information by visually checking the display unit 2. Below, examples of information displayed on the display unit 2 by the display means 10E will be described.

[0034] 4, the display means 10E displays a map M of an area including the location where the pipeline PL is laid on the display unit 2. The display means 10E highlights the pipeline PL, for example, by making the line indicating the pipeline PL thick and the other lines on the map M thin. In this embodiment, the display means 10E displays the map M on the display unit 2 so that the map M can be at least one of enlarged and reduced. In this embodiment, the display means 10E can at least one of enlarged and reduced the map M. In this embodiment, the map M is enlarged and reduced by, for example, a user inputting an instruction via the input unit 3. The display means 10E may display a scale operation unit M1 as shown in FIG. 4 in order to receive an instruction to enlarge and reduce the map M.

[0035] In this embodiment, enlarging the map M means making the map M displayed on the display unit 2 show a smaller range. In other words, enlarging the map M means making the scale of the map M displayed on the display unit 2 larger. Reducing the map M means making the map M displayed on the display unit 2 show a wider range. In other words, reducing the map M means making the scale of the map M displayed on the display unit 2 smaller. For example, as shown in Figures 4 and 5, the display means 10E can enlarge the map M by operating, for example, the scale operation unit M1 on the display unit 2. Also, as shown in Figures 5 and 4, the display means 10E can reduce the map M by operating, for example, the scale operation unit M1 on the display unit 2. As described above, the map acquired by the map acquisition unit 10A has a relatively large scale in the vicinity of the location where the pipeline PL is laid. The map has a relatively small scale in the location relatively far from the location where the pipeline PL is laid. Therefore, in this embodiment, the display means 10E displays the map M so that the scale of the map M in the location where the pipeline PL is laid is larger than the scale of the map M in the location far from the location where the pipeline PL is laid. This allows the user to grasp the geographical information of the location where the pipeline PL is laid in detail.

[0036] In the present embodiment, the display means 10E may be capable of changing the orientation of the map M. That is, the display means 10E may be capable of changing the direction indicated by one direction on the map M. In the present embodiment, the orientation of the map M is changed, for example, by a user inputting an instruction via the input unit 3. In order to receive an instruction to change the orientation of the map M, the display means 10E may display an orientation operation unit M2 as shown in FIG. 4. For example, when the display means 10E receives an operation from the orientation operation unit M2, the display means 10E rotates the display of the map M displayed on the display unit 2 on the screen, with the center of the screen as the rotation center, in accordance with the operation.

[0037] 4 and 5, the display means 10E displays the route of the pipeline PL along the ground surface above the pipeline PL on the map M. This makes it easier for the user to intuitively grasp the route of the pipeline PL. The display means 10E displays, for example, a reference position RP set at an arbitrary point on the path of the pipeline PL on the path. The reference position RP is displayed by a black circle or the like on the path of the pipeline PL, for example, as shown in Fig. 4 or 5. The reference position RP is determined by the user as described above.

[0038] 4 and 5, the display means 10E displays information about the condition of the pipeline PL at a predetermined position DP at a position corresponding to the predetermined position DP on the map M. Alternatively, the display means 10E may display information about the condition of the pipeline PL at the predetermined position DP at a position corresponding to the predetermined position DP on the list L displayed on the display unit 2.

[0039] In this embodiment, the display means 10E displays a predetermined position DP on the map M using a speech bubble B. That is, as shown in FIGS. 4 and 5, the predetermined position DP is displayed, for example, by a white circle on the route of the pipeline PL displayed on the map M. Then, a leader line Ba extends from the white circle and connects to a balloon B corresponding to the number indicating the predetermined position DP. The number of the predetermined position DP is determined, for example, sequentially along the route of the pipeline PL. This makes it possible to manage multiple predetermined positions DP that exist in the pipeline PL. Speech bubble B is automatically displayed by display means 10E at an arbitrary position on map M displayed on display unit 2. At this time, if multiple speech bubbles B are displayed on the screen, the speech bubbles B are displayed so as not to overlap each other. After that, the position of speech bubble B displayed on map M may be movable by the user as appropriate.

[0040] The display means 10E displays, for example, a list L that lists information about the conditions at each of a plurality of different predetermined positions DP on the pipeline PL. For example, as shown in Fig. 4, the list L displays the above-mentioned various pieces of information input by the user and accepted by the information acquisition unit 10C, namely, the distance from the reference position RP to the predetermined position DP, the potential difference measured on the ground surface at the predetermined position DP, and the earth potential Vp at the predetermined position DP. The list L also displays, for example, the area of ​​damage to the corrosion-protective coating of the pipeline PL calculated by the area calculation unit 10D.

[0041] In this embodiment, when there are multiple predetermined positions DP in the pipeline PL, a number is assigned to each of the multiple predetermined positions DP. That is, as shown in Fig. 4 or 5, a detection number is assigned to each of the multiple predetermined positions DP. The assigned detection number corresponds to the number of a speech bubble B displayed on the map M. In this embodiment, the list L displayed on the display unit 2 is divided into rows for each detection No. Each piece of information relating to the state of a predetermined position DP of the pipeline PL is displayed at a position on the list L corresponding to the predetermined position DP.

[0042] In this embodiment, when one of the plurality of pieces of information displayed in the list L is selected, the display means 10E highlights the information corresponding to the one piece of information and corresponding to the position corresponding to the state. The user selects one of the plurality of pieces of information by, for example, selecting a predetermined position DP or detection No. displayed in the list L using the input unit 3. For example, as shown in Fig. 5, when a predetermined position DP of detection No. 2 is selected, the color of the row in list L corresponding to detection No. 2 is displayed inverted. Also, for example, the number in speech bubble B corresponding to detection No. 2 displayed on map M is enlarged and displayed. Alternatively, the color of speech bubble B may be inverted, or the number in speech bubble B may be displayed in bold. In this embodiment, the display means 10E displays a screen used for inputting information about the pipeline PL on the display unit 2 before displaying various information about the diagnosis of the pipeline PL. At this time, the display means 10E may display only the map M and accept input of the route of the pipeline PL. Furthermore, at this time, the display means 10E may display the route of the pipeline PL on the map M and then accept input of information about the state of the pipeline PL.

[0043] The data output unit 10F converts the list L displayed on the display unit 2 by the display means 10E as described above, or the map data displayed on the display unit 2 as described above, into data that can be checked offline and records it on a recording medium. Any suitable recording medium may be used, such as a known USB (Universal Serial Bus) flash memory or DVD (Digital Versatile Disc). The data output unit 10F records the information relating to the above-mentioned list L to map M on a recording medium, thereby making it possible to refer to the above-mentioned data in an offline environment or to carry the above-mentioned data with one another.

[0044] The display device 1 according to this embodiment is configured with the above components. All or part of the functions of the display device 1 according to this embodiment may be realized using hardware such as an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array). The program may be recorded on a computer-readable recording medium. Examples of the computer-readable recording medium include portable media such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and storage devices such as a hard disk built into a computer system. The program may be transmitted via a telecommunications line.

[0045] (Display method) Next, a display method according to this embodiment will be described, that is, a method for displaying various pieces of information relating to the diagnosis of the pipeline PL using the display device 1 described above. The display method according to this embodiment includes a map acquisition step, a registration step, an information acquisition step, an area calculation step, a display step, and a data output step.

[0046] (Map acquisition step) The map acquisition step is a step in which the map acquisition unit 10A acquires a map M to be displayed on the display unit 2. In the map acquisition step, the map acquisition unit 10A acquires a map M with a relatively large scale for the map M near the location where the pipeline PL is laid. Then, the map acquisition unit 10A acquires a map M with a relatively small scale for the map M of a location relatively far from the location where the pipeline PL is laid. This makes it possible to reduce the amount of data in the map M to be acquired while providing sufficient geographical information for the location where the pipeline PL is laid. In this embodiment, when performing the map acquisition step, it is preferable that the range around the location where the pipeline PL is laid is determined in advance. This allows the map acquisition unit 10A to acquire necessary and sufficient map data. For example, it is preferable that this range is determined by the display device 1 receiving information about the area to be inspected from the user. This information may be stored in the storage unit 20, for example.

[0047] (Registration step) The registration step is a step of registering the location where the pipeline PL is laid on the map M acquired by the map acquisition unit 10A in the map acquisition step. In the registration step, the registration unit 10B accepts information about the location where the pipeline PL is laid, input by the user via the input unit 3. Then, the registration unit 10B registers the location where the pipeline PL is laid on the map M based on the information about the location where the pipeline PL is laid input by the user. This allows the route of the pipeline PL to be displayed on the map M. In the registration step, the user may, for example, input local information about the location indicated by the map M in addition to the route of the pipeline PL. That is, for example, the user may register the location where a facility such as a manhole is installed. The user may also register the location of a reference position RP in the registration step. At this time, the user may register the location where the facility such as a manhole is installed as the reference position RP.

[0048] In the registration step, the display device 1 functions, for example, in a path reception mode. The display device 1 may switch the operation mode to the path reception mode, for example, by receiving an input from a user indicating that registration of a path of the pipeline PL is to begin. The display device 1 may display a screen for receiving the switching of the operation mode. When the display means 10E is in the route acceptance mode in the registration step, it may display on the display unit 2, unlike in Fig. 4, a map M on which the route of the pipeline PL is not displayed, a scale operation unit M1, and an orientation operation unit M2, and may not display the list L. The display device 1 may accept the route input on the map M as the route of the pipeline PL.

[0049] The route of the pipeline PL registered by the registration unit 10B is displayed by the display means 10E as a series of connected straight lines, as shown in, for example, FIGS. 4 and 5. The user designates both ends of the multiple straight lines on the map M, for example, via the input unit 3. In this way, the route of the pipeline PL is formed on the map M by the registration unit 10B. In the registration step, when the user inputs information on the positions of both ends of each of the multiple straight lines, the display means 10E may calculate the length of each of the multiple straight lines. Furthermore, the display means 10E may display the calculated lengths of the straight lines in the list L. In the registration step, the user may input, in addition to information about the location where the pipeline PL is laid, information about, for example, the location of a manhole or the location of an underground buried object UO other than the pipeline PL. The registration unit 10B may display the information registered in this manner on the map M together with the pipeline PL.

[0050] The information acquisition step is a step in which the information acquisition unit 10C acquires information about the state of the pipeline PL. In the information acquisition step, the information acquisition unit 10C accepts information about the state of the pipeline PL input by the user via the input unit 3. In the information acquisition step, the user inputs, for example, the distance from a reference position RP to a predetermined position DP on the pipeline PL, the potential difference measured on the ground surface at the predetermined position DP, the earth potential Vp at the predetermined position DP, a site photograph and a detailed map at the predetermined position DP, etc. The information input by the information acquisition step is used to calculate the area of ​​damage to the corrosion protection coating of the pipeline PL in the area calculation step, and to display the map M and list L in the display step.

[0051] In the information acquisition step, the display device 1 functions, for example, in an information reception mode. The display device 1 may switch the operation mode to the information reception mode by, for example, receiving an input from the user indicating that registration of the path of the pipeline PL is to be terminated. When the display means 10E is in the information reception mode in the information acquisition step, unlike in FIG. 4, it may display on the display unit 2 a map M showing only the route of the pipeline PL, a scale operation unit M1, and an orientation operation unit M2, and not display the list L. The display device 1 may accept input of a position selected on the route of the pipeline PL as a predetermined position DP of the pipeline PL. This position and separately input information may then be stored in the storage unit 20 or the like as information regarding the state of the pipeline PL.

[0052] The area calculation step is a step in which the area calculation unit 10D calculates the area of ​​damage to the corrosion protective coating of the pipeline PL. In the area calculation step, the area calculation unit 10D calculates the area of ​​damage to the corrosion protective coating of the pipeline PL using the potential difference measured on the ground surface at a predetermined position DP of the pipeline PL and the ground potential Vp at the predetermined position DP, etc., which are input by the user. This enables the area of ​​damage to the corrosion protective coating of the pipeline PL to be displayed in the display step.

[0053] The area calculation step is started, for example, by the user inputting an instruction to start the area calculation step after inputting appropriate information in the information acquisition step, for example, by the user selecting an icon displayed on the screen.

[0054] The display step is a step in which the display means 10E displays various information on the display unit 2, as shown in Figures 4 and 5. In the display step, the display means 10E displays, for example, a map M of an area including the location where the pipeline PL is laid. Also, in the display step, the display means 10E displays information about the condition of the pipeline PL at a predetermined position DP on the map M at a position corresponding to the predetermined position DP.

[0055] In the display step, the display means 10E displays, for example, a list L that lists information about the conditions at each of a plurality of different positions on the pipeline PL. For example, as shown in Fig. 4, the list L displays the above-mentioned various information input by the user and accepted by the information acquisition unit 10C, i.e., the distance from the reference position RP to the predetermined position DP, the potential difference measured on the ground surface at the predetermined position DP, the earth potential Vp at the predetermined position DP, a site photograph at the predetermined position DP, and a detailed map. The list L also displays, for example, the area of ​​damage to the corrosion-protective coating of the pipeline PL calculated by the area calculation unit 10D. In the display step, when one of the multiple pieces of information displayed in the list L is selected, the display means 10E highlights the information corresponding to the one piece of information and at the position corresponding to the state, as shown in Figure 5. In the display step, the user may use the scale operation unit M1 to enlarge or reduce the map M displayed on the display unit 2. The user may use the orientation operation unit M2 to operate the orientation of the map M displayed on the display unit 2.

[0056] In the data output step, the data output unit 10F converts the list L displayed on the display unit 2 by the display means 10E as described above, or the map data displayed on the display unit 2 as described above, into data that can be checked offline and records it on a recording medium. By carrying out the data output step, the user can refer to the various information displayed in the display step offline or can carry the information with him or her. The display method according to this embodiment is carried out through the above steps.

[0057] As described above, according to the display device 1 of this embodiment, the display means 10E displays, on the display unit 2, a map M of an area including the location where the pipeline PL is laid. In addition, the display means 10E displays information regarding the condition of the pipeline PL at a predetermined position DP at a position corresponding to the predetermined position DP on the map M displayed on the display unit 2. This makes it easy to refer to the condition of the pipeline PL and the position corresponding to the condition of the pipeline PL. Therefore, for example, if the corrosion-protective coating of the pipeline PL is damaged, it is possible to easily grasp the location of the damage to the corrosion-protective coating of the pipeline PL. Here, in the past, the work of analyzing, organizing, and creating a report on the diagnosis results of the pipeline PL had to be done manually. Specifically, first, the diagnosis results are referenced and compared with map M to identify the location of damage to the corrosion-protective coating of the pipeline PL on map M. Then, the location of the damage was written by hand in the case of a paper map, or by inputting characters or symbols into image data in the case of a map on a computer. By making it possible to perform the above-mentioned work using the display device 1 according to this embodiment, the effort and time required for registering and referencing the diagnosis results of the pipeline PL can be significantly reduced.

[0058] Furthermore, the display means 10E displays the map M on the display unit 2 so that the map M can be at least enlarged or reduced. This makes it easier to adjust the size of the map M displayed on the display unit 2 to suit the user. For example, when checking the overall route of the pipeline PL, a wider area can be visually observed by reducing the map M. Furthermore, when checking in detail a position corresponding to the state of the pipeline PL, a more detailed map M can be visually observed by enlarging the map M. In this way, by being able to enlarge or reduce a single map M for reference, it is possible to refer to, for example, the overall status and local status of the pipeline PL on a single map M. This eliminates the need for the user to separately prepare a map M for checking the overall status of the pipeline PL and a map M for checking the local status of the pipeline PL. This reduces the user's effort.

[0059] Furthermore, the display means 10E displays the route of the pipeline PL along the ground surface of the pipeline PL on the map M displayed on the display unit 2. This allows the user to easily intuitively grasp the route of the pipeline PL. Furthermore, the display means 10E displays a reference position RP set at any point on the route of the pipeline PL on the route. This allows the user to easily grasp, for example, information about the state of the pipeline PL and the position corresponding to the state of the pipeline PL based on the distance from the reference position RP.

[0060] Furthermore, the information regarding the state of the pipeline PL includes information regarding the distance from a reference position RP set at any point on the path of the pipeline PL to a predetermined position DP of the pipeline PL. This allows, for example, a position corresponding to the state of the pipeline PL to be managed by the distance from the reference position RP. Therefore, even if there is a plurality of pieces of information regarding the state of the pipeline PL and the positions corresponding to the state of the pipeline PL, the plurality of pieces of information can be easily managed. Therefore, the information regarding the state of the pipeline PL and the positions corresponding to the state of the pipeline PL can be efficiently managed.

[0061] Further, the map acquisition unit 10A acquires the map M. This allows the map M to be displayed on the display unit 2. The registration unit 10B registers the location where the pipeline PL is laid on the map M acquired by the map acquisition unit 10A. This allows the route of the pipeline PL to be displayed on the map M. Then, the information acquisition unit 10C acquires information regarding the state of the pipeline PL. This allows the state of the pipeline PL and the positions corresponding to the state of the pipeline PL to be displayed in association with the route of the pipeline PL. This makes it easier for the user to understand the state of the pipeline PL and the positions corresponding to the state of the pipeline PL by associating them with each other.

[0062] Furthermore, the display means 10E displays a predetermined position DP of the pipeline PL in a speech bubble B. This makes it easier to visually grasp the position on the map M that corresponds to the state of the pipeline PL. Therefore, for example, even if there are multiple positions that correspond to the state of the pipeline PL, it is possible to easily grasp the positions that correspond to the multiple states simultaneously.

[0063] Furthermore, the display means 10E displays the map M so that the scale of the map M at the location where the pipeline PL is laid is larger than the scale of the map M at locations away from the location where the pipeline PL is laid. That is, with respect to the map M displayed on the display unit 2, the map M near the location where the pipeline PL is laid has a relatively large scale. This allows detailed geographical information around the location where the pipeline PL is laid to be confirmed. The map M for locations relatively far from the location where the pipeline PL is laid has a relatively small scale. This allows the amount of data on the map M to be reduced.

[0064] Moreover, the display means 10E further displays a list L that lists information about the states at each of a plurality of different positions in the pipeline PL, thereby allowing the user to grasp in more detail the information about the states of the pipeline PL corresponding to each of the plurality of positions. Furthermore, when one of the pieces of information displayed in the list L is selected, the display means 10E highlights the information corresponding to the selected piece of information and corresponding to the position corresponding to the state related to the selected piece of information. This makes it possible to easily grasp the more detailed information about the state of the pipeline PL displayed in the list L by associating it with a predetermined position DP of the pipeline.

[0065] Furthermore, the data output unit 10F converts the list L, which lists information about the state of the pipeline PL, into data that can be checked offline and records the data on a recording medium. This allows, for example, various pieces of information about the state of the pipeline PL to be referenced in an offline environment. Therefore, for example, the information included in the list L can be checked without being affected by the communication environment. Furthermore, for example, various pieces of information about the state of the pipeline PL can be made portable.

[0066] Furthermore, the condition of the pipeline PL at the predetermined position DP includes the condition of the damage to the corrosion protection coating of the pipeline PL, which makes it easier to identify the location of the damage to the corrosion protection coating of the pipeline PL.

[0067] Furthermore, the state of the pipeline PL at the predetermined position DP includes the state of whether or not the pipeline PL is in contact with an underground buried object UO other than the pipeline PL, which makes it easier to grasp the portion of the pipeline PL that is in contact with another underground buried object UO.

[0068] Furthermore, the information regarding the condition of the pipeline PL at the predetermined position DP further includes the potential difference measured on the ground surface at the predetermined position DP of the pipeline PL and the potential Vp to the ground at the predetermined position DP. This allows the results of measuring the condition of the pipeline PL using the potential difference to be displayed at a position corresponding to the condition of the pipeline PL as information regarding the condition of the pipeline PL. This makes it possible to efficiently manage more detailed information regarding the condition of the pipeline PL and the positions corresponding to the condition of the pipeline PL.

[0069] The pipeline PL further includes an area calculation unit 10D that calculates the area of ​​damage to the corrosion protective coating of the pipeline PL using information about the state of the pipeline PL. That is, for example, the area of ​​damage to the corrosion protective coating of the pipeline PL is calculated using a potential difference measured on the ground surface at a predetermined position DP of the pipeline PL and the ground potential Vp at the predetermined position DP. This makes it easier to understand the area of ​​damage to the corrosion protective coating of the pipeline PL by associating it with the position corresponding to the damage to the corrosion protective coating.

[0070] The information on the condition of the pipeline PL also includes at least one of an on-site photograph and a detailed map at the predetermined position DP, and an area of ​​damage to the corrosion protection coating of the pipeline PL, which allows for a more detailed understanding of the condition of the pipeline PL.

[0071] Furthermore, according to the above display method, in the display step, a map M of an area including the location where the pipeline PL is laid is displayed on the display unit 2. Also, in the display step, information regarding the condition of the pipeline PL at a predetermined position DP is displayed at a position corresponding to the predetermined position DP on the map M displayed on the display unit 2. This makes it possible to easily grasp the condition of the pipeline PL and the position corresponding to the condition of the pipeline PL. That is, for example, if the corrosion protection coating of the pipeline PL is damaged, it is possible to easily grasp the position of the damage to the corrosion protection coating of the pipeline PL.

[0072] The technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure. For example, the pipeline PL described in this embodiment as being laid underground may have a portion exposed above ground. In addition to the above-mentioned information, the list L displayed on the display unit 2 may also appropriately display any information related to the condition of the pipeline PL, such as the date the pipeline PL was diagnosed and the route name assigned to each pipeline PL. The display device 1 may also have a function to calculate the distance from an arbitrary location on the route of the pipeline PL displayed on the display unit 2 to the reference position RP when the user selects the selected location. Furthermore, the information displayed in the list L may be all of the above, or only some of the above may be selected and displayed as appropriate. Furthermore, on the map M, the predetermined position DP may be displayed by anything other than the speech bubble B. In addition, the list L may be automatically uploaded to a cloud on the Internet, for example. Furthermore, a plurality of pipelines PL may be displayed overlapping one another on the map M displayed on the display unit 2. In this case, the plurality of pipelines PL may be displayed in different colors according to their routes.

[0073] In addition, within the scope of the present disclosure, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described modified examples may be combined as appropriate.

[0074] (Addendum) The display device, the display method, and the program according to the embodiment can be understood, for example, as follows.

[0075] <1> A display device according to one aspect of the present disclosure includes a display means for displaying a map of an area including a location where a pipeline is laid on a display unit, and the display means displays information regarding the condition of the pipeline at a predetermined position on the map at a position corresponding to the predetermined position.

[0076] According to the above display device, the display means displays a map of an area including the location where the pipeline is laid on the display unit. The display means also displays information about the condition of a predetermined position on the pipeline at a position on the map displayed on the display unit that corresponds to the predetermined position. This allows the user to easily refer to the condition of the pipeline and the position corresponding to the pipeline condition. Therefore, for example, if the corrosion protection coating of a pipeline is damaged, the location of the damage to the corrosion protection coating on the pipeline can be easily identified. Conventionally, the pipeline condition diagnosis results had to be analyzed, organized, and compiled into a report manually. Specifically, the diagnosis results were first referenced and compared with a map to identify the location of damage to the corrosion-protective coating of the pipeline on the map. Then, the location of the damage was written by hand in the case of a paper map, or by inputting characters or symbols into image data in the case of a map on a computer. By making it possible to perform the above-mentioned operations using the display device 1 according to this embodiment, the effort and time required for registering and referencing the pipeline diagnosis results can be significantly reduced.

[0077] <2> the above <1> In the display device according to the above, the display means may be configured to display the map on the display unit in such a manner that the map can be at least one of enlarged and reduced.

[0078] Furthermore, the display means displays the map on the display unit so that the map can be at least enlarged or reduced. This makes it easier for the user to adjust the size of the map displayed on the display unit to a size that is suitable for the user. For example, when checking the overall route of a pipeline, a wider area can be visually viewed by reducing the map. Furthermore, when checking in detail a position corresponding to the status of the pipeline, a more detailed map can be visually viewed by enlarging the map. In this way, by being able to zoom in or out on a single map, it is possible to view, for example, the overall status and local status of the pipeline on a single map. This eliminates the need for the user to separately prepare a map that allows the user to check the overall status of the pipeline and a map that allows the user to check the local status of the pipeline. This reduces the user's effort.

[0079] <3> the above <1> or <2> In the display device according to the above, the display means may be configured to display the route of the pipeline on the map along the ground surface above the pipeline, and to display a reference position set at any point on the route above the route.

[0080] The display means also displays the pipeline route along the ground surface of the pipeline on a map displayed on the display unit. This allows the user to easily and intuitively grasp the pipeline route. The display means also displays a reference position set at any point on the pipeline route on the route. This allows the user to easily grasp, for example, information about the state of the pipeline and positions corresponding to the state of the pipeline based on the distance from the reference position.

[0081] <4> the above <3> In the display device according to the above, a configuration may be adopted in which the information includes information relating to a distance from the reference position to the predetermined position.

[0082] Furthermore, the information about the pipeline state includes information about the distance from a reference position set at any point on the pipeline route to a predetermined position on the pipeline. This makes it possible to manage, for example, a position corresponding to the pipeline state based on the distance from the reference position. Therefore, even if there is a plurality of pieces of information about the pipeline state and the positions corresponding to the pipeline state, the plurality of pieces of information can be easily managed. Therefore, it is possible to efficiently manage information about the pipeline state and the positions corresponding to the pipeline state.

[0083] <5> the above <1> from <4> The display device according to any one of the above aspects may be configured to further include a map acquisition unit that acquires the map, a registration unit that registers the location where the pipeline is laid on the map, and an information acquisition unit that acquires the information.

[0084] Furthermore, the map acquisition unit acquires a map. This allows the map to be displayed on the display unit. The registration unit registers the location where the pipeline is laid on the map acquired by the map acquisition unit. This allows the pipeline route to be displayed on the map. Then, the information acquisition unit acquires information regarding the pipeline status. This allows the pipeline status and the positions corresponding to the pipeline status to be displayed in association with the pipeline route. This makes it easier for the user to understand the pipeline status and the positions corresponding to the pipeline status by associating them with each other.

[0085] <6> the above <1> from <5> In the display device according to any one of the above aspects, the display means may display the predetermined position by a speech bubble.

[0086] The display means displays a predetermined position of the pipeline in a speech bubble. This makes it easier to visually grasp the position on the map corresponding to the pipeline state. Therefore, even if there are multiple positions corresponding to the pipeline state, it is easier to simultaneously grasp the positions corresponding to the multiple states.

[0087] <7> the above <1> from <6> In the display device according to any one of the above aspects, the display means may be configured to display the map so that the scale of the map at the location where the pipeline is laid is larger than the scale of the map at a location away from the location where the pipeline is laid.

[0088] The display means also displays the map so that the scale of the map at the location where the pipeline is laid is larger than the scale of the map at locations farther from the location where the pipeline is laid. That is, the map displayed on the display unit has a relatively large scale for the area near the location where the pipeline is laid. This allows the user to check the geographical information near the location where the pipeline is laid in detail. Meanwhile, the map at locations relatively farther from the location where the pipeline is laid has a relatively small scale. This reduces the amount of map data.

[0089] <8> the above <1> from <7> In the display device according to any one of the above aspects, the display means may further display a list of the information relating to the status at each of a plurality of different positions in the pipeline, and when one of the plurality of pieces of information displayed in the list is selected, the display means may highlight the information corresponding to the one piece of information that corresponds to the position corresponding to the status.

[0090] The display means further displays a list of information relating to the status at each of a plurality of different positions in the pipeline, thereby enabling a more detailed understanding of the information relating to the status of the pipeline corresponding to each of the plurality of positions. Furthermore, when one of the plurality of pieces of information displayed in the list is selected, the display means highlights the information corresponding to the selected piece of information and corresponding to the position corresponding to the state related to the selected piece of information. This makes it possible to easily grasp the more detailed information about the state of the pipeline displayed in the list by associating it with a predetermined position DP of the pipeline.

[0091] <9> the above <8> The display device according to the above aspect may further include a data output unit that converts the list into data that can be checked offline and records the data on a recording medium.

[0092] The data output unit also converts the list of information related to the pipeline status into data that can be checked offline and records the data on a recording medium. This allows, for example, various pieces of information related to the pipeline status to be referenced in an offline environment. Therefore, for example, the information included in the list can be checked without being affected by the communication environment. Also, for example, various pieces of information related to the pipeline status can be made portable.

[0093] <10> the above <1> from <9> In the display device according to any one of the above aspects, the condition may include a condition related to damage to a corrosion-resistant coating of the pipeline.

[0094] Furthermore, the condition at a predetermined position of the pipeline includes a condition related to damage to the corrosion protection coating of the pipeline, which makes it easier to identify the location of the damaged corrosion protection coating in the pipeline.

[0095] <11> the above <1> from <10> In the display device according to any one of the above aspects, a configuration may be adopted in which the state includes a state regarding whether or not there is contact with an underground buried object other than the pipeline.

[0096] Furthermore, the state of the pipeline at a predetermined position includes the state of whether or not the pipeline is in contact with other underground buried objects, which makes it easier to identify the parts of the pipeline that are in contact with other underground buried objects.

[0097] <12> the above <1> from <11> In the display device according to any one of the above aspects, a configuration may be adopted in which the information further includes a potential difference measured on the ground surface at a predetermined position on the pipeline and a potential relative to the ground at the predetermined position.

[0098] Furthermore, the information regarding the condition of the pipeline at a predetermined position further includes the potential difference measured on the ground surface at the predetermined position of the pipeline and the potential to the ground at the predetermined position. This allows the results of measuring the pipeline condition using the potential difference to be displayed as information regarding the pipeline condition at a position corresponding to the pipeline condition. This makes it possible to efficiently manage more detailed information regarding the pipeline condition and the positions corresponding to the pipeline condition.

[0099] <13> the above <1> from <12> The display device according to any one of the above aspects may be configured to further include an area calculation unit that uses the information to calculate an area of ​​damage to the corrosion-resistant coating of the pipeline.

[0100] The system further includes an area calculation unit that calculates the area of ​​damage to the corrosion protective coating of the pipeline using information about the pipeline condition. For example, the area of ​​damage to the corrosion protective coating of the pipeline is calculated using a potential difference measured at the ground surface at a predetermined position on the pipeline and the potential to the ground at the predetermined position. This makes it easier to understand the area of ​​damage to the corrosion protective coating of the pipeline by associating it with the position corresponding to the damage to the corrosion protective coating.

[0101] <14> the above <1> from <13> In the display device according to any one of the above aspects, the information may include at least one of a site photograph and a detailed map at the specified location, and an area of ​​damage to the corrosion-resistant coating of the pipeline.

[0102] The information about the pipeline condition also includes at least one of a site photograph and a detailed map at a predetermined location, and an area of ​​damage to the corrosion protection coating of the pipeline, which allows for a more detailed understanding of the pipeline condition.

[0103] <15> A display method according to one aspect of the present disclosure includes a display step of displaying a map of an area including a location where a pipeline is laid on a display unit, and in the display step, information regarding the condition of the pipeline at a predetermined position is displayed at a position on the map corresponding to the predetermined position.

[0104] According to the above display method, in the display step, a map of an area including a location where a pipeline is laid is displayed on a display unit. Also, in the display step, information regarding the condition of a predetermined position of the pipeline is displayed at a position corresponding to the predetermined position on the map displayed on the display unit. This makes it possible to easily grasp the condition of the pipeline and the position corresponding to the pipeline condition. That is, for example, if the corrosion protection coating of a pipeline is damaged, it is possible to easily grasp the position of the damage to the corrosion protection coating of the pipeline.

[0105] <16> A program according to one aspect of the present disclosure includes: <1> from <14> The display device according to any one of the above aspects is characterized in that it functions as a display device according to any one of the above aspects. [Explanation of symbols]

[0106] 1 Display device 2 Display section 3 Input section 10 Control Unit 10A Map Acquisition Unit 10B Registration Department 10C Information acquisition section 10D area calculation part 10E Display means 10F Data output section 11 processors 12 Memory 20 Memory section B Speech bubble Ba lead wire D Damaged area DP in place I current L List LC receiver LCa wheel electrode M Map M1 Scale Control Unit M2 Orientation Control Unit PL Pipeline RP reference position T contact part TL measurement signal generator TLa opposite pole UO underground objects

Claims

1. a display means for displaying a map of an area including a location where the pipeline is laid on a display unit; the display means displays information about the state of the pipeline at a predetermined position on the map at a position corresponding to the predetermined position. A display device characterized by:

2. the display means displays the map on the display unit in a manner that allows at least one of enlarging and reducing the map.

2. The display device according to claim 1.

3. The display means displaying on the map a path of the pipeline along the ground surface above the pipeline; a reference position set at an arbitrary point on the route is displayed on the route; 2. The display device according to claim 1.

4. the information includes information about a distance from the reference position to the predetermined position; 4. The display device according to claim 3.

5. a map acquisition unit that acquires the map; a registration unit that registers the location where the pipeline is laid on the map; An information acquisition unit that acquires the information, 2. The display device according to claim 1.

6. the display means displays the predetermined position by a speech bubble.

2. The display device according to claim 1.

7. the display means displays the map so that the scale of the map at the location where the pipeline is laid is larger than the scale of the map at a location away from the location where the pipeline is laid.

2. The display device according to claim 1.

8. the display means further displays a list of the information regarding the status at each of a plurality of different positions in the pipeline; when one of the plurality of pieces of information displayed in the list is selected, the display means highlights the information corresponding to the one piece of information, which is at a position corresponding to the state.

2. The display device according to claim 1.

9. a data output unit that converts the list into data that can be checked offline and records the data on a recording medium; 9. The display device according to claim 8.

10. The condition includes a condition related to damage to a corrosion protection coating of the pipeline.

2. The display device according to claim 1.

11. The condition includes a condition regarding whether or not the pipeline is in contact with an underground buried object other than the pipeline.

2. The display device according to claim 1.

12. The information further includes a potential difference measured on the earth's surface at the predetermined location and a potential relative to the earth at the predetermined location.

2. The display device according to claim 1.

13. An area calculation unit that calculates an area of ​​damage to the corrosion protection coating of the pipeline using the information.

13. The display device according to claim 12.

14. the information includes at least one of a site photograph and a detailed map of the predetermined location, and an area of ​​damage to the corrosion protection coating of the pipeline; 2. The display device according to claim 1.

15. a display step of displaying a map of an area including a location where the pipeline is laid on a display unit; In the display step, information about the state of the pipeline at a predetermined position is displayed at a position on the map corresponding to the predetermined position. A display method characterized by:

16. A computer is caused to function as the display device according to any one of claims 1 to 14. A program characterized by:

Images