Drainage inspection method

Abstract

To provide a drain inspection system, a drain inspection method and a computer program allowing one-man work of a drain inspection and improvement of work efficiency of the drain inspection.SOLUTION: A drain inspection system 10 confirms flow of drain W discharged from a water section facility 21 to a drain pipe 24. The drain inspection system 10 has: a first terminal 30 arranged at a position allowing imaging the inside of a drain basin 25 provided in the middle of the drain pipe 24; and a second terminal 40 communicably connected to the first terminal 30. The first terminal 30 has a transmission part transmitting a first image imaging the inside of the drain basin 25 by an imaging part of the first terminal 30 to the second terminal 40. The second terminal 40 has a display control part displaying the first image acquired from the first terminal 30 and a second image of the drain W discharged from the water section facility 21 to the drain pipe 24, imaged by an imaging part of the second terminal 40, on a display part of the second terminal 40.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a drainage inspection system, a drainage inspection method, and a computer program.

Background Art

[0002] Conventionally, for plumbing facilities (toilets, baths, kitchens, etc.) installed in buildings such as detached houses, a drainage inspection is performed before completion to check whether there are any problems with the drainage condition (such as the flow of drainage) of the drain pipe. In a general drainage inspection, an operator drains water from the plumbing facility into the drain pipe, and another operator looks into a drain trap provided in the middle of the drain pipe to visually confirm whether the drainage is flowing normally.

[0003] Also, Patent Document 1 discloses, as a drainage inspection for apartment houses, etc., a drain pipe water flow test system that determines clogging of a drain pipe based on the time required from when a test body that emits radio waves is inserted from the upstream side of the drain pipe until it is recovered at the downstream side, and a portable terminal that detects radio waves from the test body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional drainage inspection, although it is a simple operation of flowing drainage from plumbing facilities into the drain pipe and checking the flow of the drainage with a drainage trough provided in the middle of the drain pipe, two workers were always required. Therefore, there was a problem that the working efficiency of the drainage inspection was extremely poor, such as two workers had to go to the site only for the drainage inspection. Also, even when using the method of Patent Document 1 above, since the test body was inserted from the upstream side of the drain pipe and recovered from the downstream side, two workers were still required, and it was difficult to solve the above problem.

[0006] The present invention provides a drainage inspection system, a drainage inspection method, and a computer program that can realize one-person operation of drainage inspection and improve the working efficiency of drainage inspection.

Means for Solving the Problems

[0007] A drainage inspection system according to one aspect of the present invention checks the flow of drainage discharged from plumbing facilities into a drain pipe. The drainage inspection system includes a first terminal disposed at a position where the inside of a drainage trough provided in the middle of the drain pipe can be photographed, and a second terminal communicably connected to the first terminal. The first terminal has a transmission unit that transmits a first video obtained by photographing the inside of the drainage trough with the photographing unit of the first terminal to the second terminal. The second terminal has a display control unit that displays the first video acquired from the first terminal and a second video obtained by photographing the drainage discharged from the plumbing facilities into the drain pipe with the photographing unit of the second terminal on the display unit of the second terminal.

[0008] In the above drainage inspection system, the display control unit of the second terminal may be configured to control the first video and the second video to be displayed in predetermined areas in the display area of the display unit.

[0009] Also, the first terminal may be arranged on a jig for holding the terminal that closes the upper opening of the drainage trough.

[0010] Another aspect of the present invention, a drainage inspection method, checks the flow of drainage discharged from plumbing facilities into a drain pipe. The drainage inspection method includes a step in which a first terminal disposed at a position where the inside of a drainage pit provided in the middle of the drain pipe can be photographed captures a first image of the inside of the drainage pit with a photographing unit of the first terminal and transmits the first image to a second terminal communicably connected to the first terminal, and a step in which the second terminal displays, on a display unit of the second terminal, the first image acquired from the first terminal and a second image of the drainage discharged from the plumbing facilities into the drain pipe photographed by a photographing unit of the second terminal.

[0011] Still another aspect of the present invention, a computer program, is used in a drainage inspection system for checking the flow of drainage discharged from plumbing facilities into a drain pipe. The computer program causes a computer to execute a function in which a first terminal disposed at a position where the inside of a drainage pit provided in the middle of the drain pipe can be photographed captures a first image of the inside of the drainage pit with a photographing unit of the first terminal and transmits the first image to a second terminal communicably connected to the first terminal, and a function in which the second terminal displays, on a display unit of the second terminal, the first image acquired from the first terminal and a second image of the drainage discharged from the plumbing facilities into the drain pipe photographed by a photographing unit of the second terminal.

Advantages of the Invention

[0012] According to the present invention, it is possible to provide a drainage inspection system, a drainage inspection method, and a computer program that enable one-person operation of drainage inspection and improve the work efficiency of drainage inspection.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present invention will be described with reference to the drawings. (First Embodiment) As shown in FIG. 1, the drainage inspection system 10 of the present embodiment is used for a drainage inspection in which the operator A checks the drainage status of the plumbing facilities 21 installed in the building 20.

[0015] The building 20 for which the operator A performs the drainage inspection is a detached house. A plurality of plumbing facilities 21 are installed in the building 20. Examples of the plumbing facilities 21 include a toilet 211, a bathtub 212, a kitchen 213, and the like.

[0016] The building 20 is provided with a water supply facility (not shown) for supplying water to the plumbing facilities 21 and a drainage facility 22 for draining the drainage W from the plumbing facilities 21. The drainage facility 22 is a facility for guiding the drainage W from the plumbing facilities 21 installed in the building 20 to the sewer pipe 23 outside the site of the building 20.

[0017] The drainage facility 22 includes a drain pipe 24 connecting between each plumbing facility 21 and the sewer pipe 23, and a plurality of drainage wells provided in the middle of the drain pipe 24. The drain pipe 24 is configured by connecting a plurality of pipe members. Although not shown in the figure, the plurality of drainage wells include a drainage well (sewage well) provided corresponding to each plumbing facility 21, and a drainage well (final well) 25 provided on the most downstream side of the drain pipe 24.

[0018] The drainage inspection system 10 includes a first terminal 30 and a second terminal 40. The first terminal 30 and the second terminal 40 are terminal devices used by an operator A who performs drainage inspections. As the first terminal 30 and the second terminal 40, a smartphone, a tablet, a personal computer (PC), etc. can be used.

[0019] Since the first terminal 30 and the second terminal 40 are used at the site where the operator A performs drainage inspections, it is preferable that they are portable terminals such as smartphones that are easy for the operator A to carry. In the present embodiment, both the first terminal 30 and the second terminal 40 are smartphones.

[0020] As shown in FIG. 2, the first terminal 30 is arranged at a position where it can photograph the inside of the drainage well 25. The drainage well 25 has a well main body portion 26 and a cylindrical standing portion 27 that rises upward from the well main body portion 26. The upstream drain pipe 24 and the downstream drain pipe 24 are connected to the well main body portion 26. The well main body portion 26 is provided with an inlet 261 through which the drainage W flows in and an outlet 262 through which the drainage W flows out.

[0021] The drainage well 25 is provided with a terminal holding jig 50 so as to close the upper opening of the standing portion 27. The terminal holding jig 50 is configured to be detachable from the upper opening of the standing portion 27. The terminal holding jig 50 has a cylindrical main body pipe portion 51, a circular plate-shaped opening / closing lid portion 52 provided so as to close the upper end of the main body pipe portion 51, and a circular plate-shaped bottom portion 53 provided so as to close the lower end of the main body pipe portion 51.

[0022] The main body pipe portion 51 is inserted and disposed at the upper end portion of the standing portion 27. The opening / closing lid portion 52 is disposed in the upper end concave portion of the main body pipe portion 51 and is configured to be openable / closable (detachable). In the center of the opening / closing lid portion 52, a circular window portion 521 for lighting is provided. The portions of the main body pipe portion 51 and the opening / closing lid portion 52 other than the window portion 521 are made of vinyl chloride resin. The window portion 521 and the bottom portion 53 of the opening / closing lid portion 52 are made of transparent vinyl chloride resin.

[0023] The first terminal 30 is disposed within the terminal holding jig 50. Specifically, the first terminal 30 is placed on the bottom portion 53 of the terminal holding jig 50. The first terminal 30 is disposed at a position where it can photograph the inside of the drain pan 25 (inside the pan main body portion 26) located below through the transparent bottom portion 53. Note that the first terminal 30 only needs to be disposed within the terminal holding jig 50 during the drain inspection.

[0024] As shown in FIG. 3, the drain inspection system 10 includes a server 60 and a storage 61 in addition to the first terminal 30 and the second terminal 40. The first terminal 30 and the second terminal 40 are configured to be communicable with the server 60 and the storage 61 via a computer network including the Internet (hereinafter simply referred to as the network N).

[0025] The first terminal 30 includes a photographing unit 31, a display unit 32, and a transmitting unit 33. The photographing unit 31 is a camera (imaging device) that photographs the inside of the drain pan 25. Specifically, the photographing unit 31 photographs the drain W flowing inside the drain pan 25.

[0026] The display unit 32 displays the video (hereinafter referred to as the first video) photographed by the photographing unit 31. In the present embodiment, the display unit 32 displays the real-time first video (video data) being photographed by the photographing unit 31. The display unit 32 is a display device composed of liquid crystal, organic EL, etc. The display unit 32 is composed of a touch panel and can display operation buttons and the like to enable operation of the first terminal 30.

[0027] In response to a request from the second terminal 40, the transmission unit 33 transmits the first video captured by the imaging unit 31 to the second terminal 40. In the present embodiment, the transmission unit 33 transmits the real-time first video captured by the imaging unit 31 to the second terminal 40.

[0028] The second terminal 40 includes an imaging unit 41, a display unit 42, a request unit 43, an acquisition unit 44, a display control unit 45, a recording unit 46, and a processing unit 47. The imaging unit 41 is a camera (imaging device) that images the plumbing facility 21. Specifically, the imaging unit 41 images the wastewater W discharged from the plumbing facility 21 into the drain pipe 24.

[0029] The display unit 42 displays the video captured by the imaging unit 41 (hereinafter referred to as the second video). In the present embodiment, the display unit 42 displays the real-time second video (video data) captured by the imaging unit 41. The display unit 42 also displays the real-time first video acquired by the acquisition unit 44 from the first terminal 30, which will be described later. The display unit 42 is a display device composed of liquid crystal, organic EL, etc. The display unit 42 is composed of a touch panel and can display operation buttons and the like to operate the second terminal 40.

[0030] The request unit 43 requests the first terminal 30 to transmit the first video to the second terminal 40. The acquisition unit 44 acquires the first video transmitted from the first terminal 30 to the second terminal 40 by the transmission unit 33 of the first terminal 30.

[0031] The display control unit 45 displays the first video acquired by the acquisition unit 44 from the first terminal 30 and the second video captured by the imaging unit 41 on the display unit 42 of the second terminal 40. The display control unit 45 also controls so that the first video and the second video are each displayed in a predetermined area on the display screen (display area) of the display unit 42. In the present embodiment, the display control unit 45 displays the real-time first video acquired by the acquisition unit 44 from the first terminal 30 and the real-time second video captured by the imaging unit 41 side by side vertically on the display screen of the display unit 42.

[0032] The recording unit 46 records the first video and the second video displayed on the display unit 42. In the present embodiment, the recording unit 64 records the entire display screen of the display unit 42 including the first video and the second video.

[0033] The processing unit 47 performs a processing operation of cutting out the portions of the first video and the second video from the recording data in which the entire display screen of the display unit 42 has been recorded by the recording unit 46, and generates video data in which the first video and the second video are recorded.

[0034] The server 60 is a cloud server that can be used via the network N. The server 60 has a function of performing authentication processing for a user (operator A) who uses the drainage inspection system 10 using the first terminal 30 and the second terminal 40.

[0035] Also, when performing connection communication processing between the first terminal 30 and the second terminal 40, the server 60 functions as a signaling server for establishing P2P (Peer to Peer) communication between the first terminal 30 and the second terminal 40 using WebRTC (Web Real-Time Communication) technology.

[0036] The storage 61 is a cloud storage that can be used via the network N. The storage 61 stores the video data (recording data of the first video and the second video) transmitted from the second terminal 40.

[0037] Note that the functional configuration of the drainage inspection system 10 described above is merely an example, and one function may be divided or a plurality of functions may be combined into one function. Each functional processing unit has a computer program (hereinafter simply referred to as a program) including application software stored in a storage device such as a memory, and the like, and the CPU built in the terminal or the server executes various processes according to the program, thereby realizing various functions. Each functional processing unit may be realized by controlling a part of the hardware.

[0038] Next, a drainage inspection method using the drainage inspection system 10 will be described. Operator A preliminarily logs in to the drainage inspection system 10 for the first terminal 30 and the second terminal 40. Specifically, Operator A operates the first terminal 30 and the second terminal 40, inputs the user ID and password, and transmits them to the server 60. The server 60 refers to the user identification information (user ID, password) stored in the database to authenticate the user (Operator A). As a result, the first terminal 30 and the second terminal 40 are in a state of logging in to the drainage inspection system 10.

[0039] Next, as shown in FIGS. 4(A) to (C), Operator A places the first terminal 30 at a position where it can photograph the inside of the drainage trough 25. Operator A places the first terminal 30 using the terminal holding jig 50. The procedure will be described below.

[0040] As shown in FIG. 4(A), the standing portion 27 of the drainage trough 25 is provided with a sealing lid 28 arranged to close the upper opening of the standing portion 27. The sealing lid 28 has a cylindrical main body tube portion 281 and a circular plate-shaped opening / closing lid portion 282 provided to close the upper end of the main body tube portion 281.

[0041] The main body tube portion 281 is inserted and arranged at the upper end portion of the standing portion 27 of the drainage trough 25. The opening / closing lid portion 282 is arranged in the upper end recess of the main body tube portion 281 and is configured to be openable / closable (detachable). The sealing lid 28 (main body tube portion 281, opening / closing lid portion 282) is made of vinyl chloride resin.

[0042] As shown in FIG. 4(B), the sealing lid 28 is removed from the standing portion 27 of the drainage trough 25. As shown in FIG. 4(C), the terminal holding jig 50 is attached to the standing portion 27 of the drainage trough 25 so as to close the upper opening of the standing portion 27. Specifically, the main body tube portion 51 of the terminal holding jig 50 is inserted into the upper end portion of the standing portion 27 of the drainage trough 25.

[0043] Then, open the opening / closing lid portion 52 of the terminal holding jig 50 and place the first terminal 30 on the bottom portion 53. At this time, operator A operates the first terminal 30 to make it in a state where it can be photographed by the photographing unit 31 (photographing state). Also, place the display portion 32 of the first terminal 30 on the upper side and the photographing unit 31 provided on the side opposite to the display portion 32 of the first terminal 30 on the lower side. Thereby, the first terminal 30 is disposed at a position where it can photograph the inside of the drain pan 25 (inside the pan main body portion 26) located below through the transparent bottom portion 53.

[0044] As shown in FIG. 5, on the display screen of the display portion 32 of the first terminal 30, the real-time first video 310 photographed by the photographing unit 31 is displayed. Operator A checks whether the inside of the drain pan 25 can be photographed by the first video 310 displayed on the display portion 32 of the first terminal 30. Then, close the opening / closing lid portion 52 of the terminal holding jig 50 to complete the arrangement of the first terminal 30.

[0045] Next, operator A holds the second terminal 40 and moves to the plumbing facility 21 (toilet 211) of the building 20 that is the object of the drainage inspection. Then, operator A operates the second terminal 40 to make it in a state where it can be photographed by the photographing unit 41 (photographing state). In the present embodiment, by setting the second terminal 40 in the photographing state, connection communication processing between the first terminal 30 and the second terminal 40 is performed.

[0046] In the present embodiment, the WebRTC technology is used for the connection communication between the first terminal 30 and the second terminal 40. Specifically, P2P communication between the first terminal 30 and the second terminal 40 is established with the server 60 as a signaling server. That is, a secure communication path that can continuously communicate between the first terminal 30 and the second terminal 40 is established without passing through the server 60, and direct transmission and reception of data and the like are possible between the two.

[0047] Then, the second terminal 40 requests the first terminal 30 to transmit the first video 310 to the second terminal 40. In response to the request from the second terminal 40, the first terminal 30 transmits the real-time first video 310 captured by the imaging unit 31 to the second terminal 40. The second terminal 40 acquires the first video 310 transmitted from the first terminal 30 to the second terminal 40.

[0048] As shown in FIG. 6, on the display screen of the display unit 42 of the second terminal 40, the first video 310 acquired from the first terminal 30 and the real-time second video 410 captured by the imaging unit 41 are displayed side by side vertically. In this embodiment, the first video 310 is displayed in the upper part of the display screen of the display unit 42, and the second video 410 is displayed in the lower part of the display screen with the same size. Further, a recording button 421 is displayed at the lower part of the display screen of the display unit 42.

[0049] Note that the first video 310 is displayed with the central part excluding the upper and lower parts in the video (see FIG. 5) captured by the imaging unit 31 of the first terminal 30 according to the area to be displayed on the display screen of the display unit 42 of the second terminal 40. Similarly, the second video 410 is also displayed with the central part excluding the upper and lower parts in the video captured by the imaging unit 41 of the second terminal 40.

[0050] Then, while looking at the second video 410 displayed on the display unit 42 of the second terminal 40, the operator A captures the plumbing facility 21 (toilet 211) to be inspected for drainage by the imaging unit 41 provided on the side opposite to the display unit 42 of the second terminal 40.

[0051] Next, as shown in FIG. 7(A), the operator A touches the recording button 421 displayed on the display screen of the display unit 42 of the second terminal 40. Thereby, the recording of the first video 310 and the second video 410 displayed on the display unit 42 is started. In this embodiment, the entire display screen of the display unit 42 including the first video 310 and the second video 410 is recorded. At this time, the characters "recording" 422 are displayed at the upper part of the display screen of the display unit 42.

[0052] Then, operator A supplies water (flows water) to the plumbing facility 21 and takes a picture of the drainage water W discharged from the plumbing facility 21 to the drain pipe 24. In this embodiment, the state of water flowing in the toilet 211 is photographed. Operator A takes the picture while looking at the second video 410 displayed on the display unit 42 of the second terminal 40.

[0053] Next, as shown in FIG. 7(B), while looking at the first video 310 displayed on the display unit 42 of the second terminal 40, operator A checks the state in which the drainage water W discharged from the plumbing facility 21 (toilet 211) flows through the drain pipe 24 from the inlet 261 to the outlet 262 in the drain pan 25. After operator A checks the drainage situation (the flow of the drainage water W), the operator touches the recording button 421 displayed on the display unit 42 of the second terminal 40 to end the recording.

[0054] After the recording is finished, by performing an operation to save the recording data by operator A, the connection communication between the first terminal 30 and the second terminal 40 is automatically interrupted. That is, the transmission of the first video 310 from the first terminal 30 to the second terminal 40 ends, and the display of the first video 310 and the second video 410 on the display unit 42 of the second terminal 40 ends.

[0055] The second terminal 40 performs a processing operation of cutting out the portions of the first video 310 and the second video 410 from the recording data in which the entire display screen of the display unit 42 is recorded, and generates video data in which the first video 310 and the second video 410 are recorded.

[0056] The second terminal 40 transmits the generated video data (recording data of the first video 310 and the second video 410) to the storage 61. The video data is stored in the storage 61. Thereby, operator A finishes checking the drainage situation of the plumbing facility 21 (toilet 211). Operator A checks the drainage situation of other plumbing facilities 21 (bathtub 212, kitchen sink 213, etc.) in the same procedure.

[0057] When Operator A finishes checking the drainage status of all plumbing facilities 21 subject to the drainage inspection, he / she moves to the drainage pit 25 with the second terminal 40, removes the terminal holding jig 50 from the standing portion 27 of the drainage pit 25, and takes out the first terminal 30 from the terminal holding jig 50. Then, the sealing lid 28 is attached so as to close the upper opening of the standing portion 27 of the drainage pit 25. Thus, the drainage inspection using the drainage inspection system 10 is completed.

[0058] Next, the operation and effect of the drainage inspection system 10 of the present embodiment will be described. According to the drainage inspection system 10 of the present embodiment, the first terminal 30 (transmission unit 33) transmits the first video 310 captured by the imaging unit 31 of the first terminal 30 to the second terminal 40. Then, the second terminal 40 (display control unit 45) displays, on the display unit 42, the first video 310 acquired from the first terminal 30 and the second video 410 captured by the imaging unit 41 of the second terminal 40.

[0059] Therefore, Operator A can confirm, while capturing with the imaging unit 41 the drainage W discharged from the plumbing facility 21 to the drain pipe 24 in the second video 410 displayed on the display unit 42 of the second terminal 40, and can also confirm, in the first video 310 displayed on the display unit 42 of the second terminal 40, the state in which the drainage W discharged from the plumbing facility 21 to the drain pipe 24 flows through the inside of the drainage pit 25 via the drain pipe 24. This enables a single-operator drainage inspection and improves the work efficiency of the drainage inspection.

[0060] Further, the second terminal 40 (display control unit 45) controls so that the first video 310 and the second video 410 are respectively displayed in predetermined areas on the display screen (display area) of the display unit 42. Therefore, the first video 310 and the second video 410 can be accurately displayed at appropriate positions on the display screen of the display unit 42. Thus, for example, as in the present embodiment, by arranging the first video 310 and the second video 410 side by side vertically in the same size, it becomes easier for Operator A to perform the drainage inspection work while viewing the first video 310 and the second video 410 simultaneously.

[0061] Further, the first terminal 30 is disposed on a terminal holding jig 50 that closes the upper opening of the drain pan 25. Therefore, the first terminal 30 can be easily disposed at a position where the inside of the drain pan 25 can be photographed. Further, by attaching the terminal holding jig 50 instead of the sealing lid 28 attached to the drain pan 25, it is not necessary to perform a drainage inspection in a state where the sealing lid 28 is removed (a state where the upper part of the drain pan 25 is open). Therefore, it is possible to realize one-person operation of the drainage inspection while ensuring safety.

[0062] (Second Embodiment) As shown in FIGS. 8(A) to 8(C), this embodiment is an example in which the configuration regarding the arrangement of the first terminal 30 using the terminal holding jig 50 is changed in the drainage inspection system 10. Note that descriptions of the same configurations, operations, and effects as those in the first embodiment are omitted.

[0063] As shown in FIG. 8(A), a sealing lid 28 is disposed on the standing portion 27 of the drain pan 25 so as to close the upper opening of the standing portion 27. As shown in FIG. 8(B), the opening / closing lid portion 282 of the sealing lid 28 is removed. As shown in FIG. 8(C), the terminal holding jig 50 is placed on the main body pipe portion 281 of the sealing lid 28. Specifically, the main body pipe portion 51 of the terminal holding jig 50 is placed on the upper end recess of the main body pipe portion 281 of the sealing lid 28.

[0064] Then, the opening / closing lid portion 52 of the terminal holding jig 50 is opened, and the first terminal 30 is placed on the bottom portion 53. Thereby, the first terminal 30 is disposed at a position where the inside of the drain pan 25 (inside the pan main body portion 26) located below can be photographed through the transparent bottom portion 53. Thereafter, the opening / closing lid portion 52 of the terminal holding jig 50 is closed, and the arrangement of the first terminal 30 is completed.

[0065] In this embodiment, it is only necessary to remove the opening / closing lid portion 282 of the sealing lid 28 provided on the standing portion 27 of the drain pan 25, and it is not necessary to remove the entire sealing lid 28. Therefore, the operation of arranging the first terminal 30 using the terminal holding jig 50 becomes easy.

[0066] (Other Embodiments) The present invention is not limited to the above-described embodiments, and it goes without saying that the present invention can be implemented in various aspects without departing from the scope of the present invention.

[0067] (1) In the above embodiment, the toilet 211, the bathroom 212, and the kitchen 213 are exemplified as the plumbing facilities 21. However, the plumbing facilities include, among other things, facilities installed in places where water is used, such as washbasins and laundry areas.

[0068] (2) In the above embodiment, a detached house is shown as an example of the building 20 for which drainage inspection is performed using the drainage inspection system 10. However, the drainage inspection using the drainage inspection system can be applied to buildings such as apartment houses.

[0069] (3) In the above embodiment, the first terminal 30 captures an image inside the drainage pit (final pit) 25 provided at the most downstream side of the drain pipe 24 to confirm the flow of the drainage W. However, for example, an image may be captured inside other drainage pits, such as the drainage pits (sewage pits) provided corresponding to each plumbing facility, to confirm the flow of the drainage.

[0070] (4) In the above embodiment, the first terminal 30 is arranged at a position where it can capture an image inside the drainage pit 25 by being held by the terminal holding jig 50. However, if the first terminal can be arranged at a position where it can capture an image inside the drainage pit, it may be held and arranged by any method.

[0071] (5) In the above embodiment, the imaging unit 41 of the second terminal 40 captures an image of the drainage W discharged from the plumbing facility 21 to the drain pipe 24. Here, capturing an image of the drainage discharged from the plumbing facility to the drain pipe means capturing the state in which the drainage from the plumbing facility is discharged to the drain pipe to such an extent that it can be confirmed that the drainage is being performed normally.

[0072] (6) In the above embodiment, P2P communication based on the WebRTC technology is used for the connection communication between the first terminal 30 and the second terminal 40, enabling direct transmission and reception of data and the like between the two. However, any conventionally known connection and communication methods, such as connection and communication methods, may be used for the connection and communication between the two. Also, regarding the transmission and reception of data and the like between the two, the transmission and reception of data and the like between the two may be performed via a server or the like.

[0073] (7) In the above embodiment, on the display unit 42 of the second terminal 40, the first video 310 and the second video 410 are displayed side by side vertically in the same size. However, the sizes, positions, etc. of the first video and the second video displayed on the display unit of the second terminal may be changed as appropriate.

[0074] (8) In the above embodiment, in the second terminal 40, the processing of the recorded data obtained by recording the entire display screen of the display unit 42 is performed, and the generated video data (the recorded data of the first video 310 and the second video 410) is stored in the storage 61. However, for example, the recorded data may be stored in the storage and then processed by the server. Also, the processing may be performed using an external API (Application Programming Interface) or the like after storing in the storage. Further, the processing may be performed using an external API or the like in the second terminal, or the processing may be performed using an external API or the like simultaneously with the recording in the second terminal.

[0075] (9) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Also, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the above embodiment may be added to, replaced with, etc. the configuration of other above embodiments. Note that all aspects included in the technical idea specified from the language described in the claims are embodiments of the present invention.

Explanation of Reference Numerals

[0076] 10… Drain inspection system, 21… Plumbing facilities, 24… Drain pipe, 25… Drainage pit, 30… First terminal, 31… Imaging unit, 33… Transmission unit, 40… Second terminal, 41… Imaging unit, 42… Display unit, 45… Display control unit, 310… First video, 410… Second video, W… Drainage

Claims

**Claim 1**: A drainage inspection method in which an operator checks the flow of drainage discharged from plumbing facilities into a drain pipe alone, comprising: the step of the operator removing an opening / closing lid portion arranged to close an upper opening of a drain pan provided in the middle of the drain pipe and attaching a terminal holding jig to close the upper opening of the drain pan; the step of the operator holding a first terminal at a position where the inside of the drain pan can be photographed in the terminal holding jig; the step of transmitting a first video obtained by photographing the inside of the drain pan by the photographing unit of the first terminal from the first terminal to a second terminal communicably connected to the first terminal; the step of displaying, on a display unit of the second terminal, the first video obtained from the first terminal and a second video being photographed by the photographing unit of the operator on the second terminal; the step of the operator supplying water to the plumbing facilities and, while viewing the second video displayed on the display unit of the second terminal, photographing the drainage discharged from the plumbing facilities into the drain pipe by the photographing unit of the second terminal and checking the drainage flowing through the inside of the drain pan from the plumbing facilities through the drain pipe with the first video displayed on the display unit of the second terminal. Drainage inspection method **Claim 2**: The drainage inspection method according to claim 1, further comprising the step of recording the first video and the second video displayed on the display unit of the second terminal. **Claim 3**: The drainage inspection method according to claim 2, further comprising the step of generating video data in which the first video and the second video are recorded after recording the first video and the second video displayed on the display unit of the second terminal.

Images