JP-2026075761-A - Communication methods within tunnels and methods for laying power cables within tunnels

JP2026075761AJP 2026075761 AJP2026075761 AJP 2026075761AJP-2026075761-A

Abstract

[Problem] To provide a communication method for inside tunnels that ensures a communication environment and allows workers to communicate efficiently with each other. [Solution] The communication method within a tunnel comprises a communication equipment installation step and an access point device installation step. The plurality of access point devices include a first access point device and a second access point device. The access point device installation step includes a communication cable laying step, a first access point device installation step of installing the first access point device by connecting it to the communication cable in a detachable manner, and a second access point device installation step of installing the second access point device by connecting it to the communication cable in a detachable manner at a position spaced apart from the first access point device. The second access point device installation step includes connecting the second access point device to the communication cable at a position spaced apart from the first access point device such that the second wireless communication area overlaps with a part of the first wireless communication area. [Selection Diagram] Figure 7

Inventors

小谷孝之
財田洋佑

Assignees

住友電設株式会社

Dates

Publication Date: 20260511
Application Date: 20241023

Claims (18)

A method of communication within a tunnel, A communication equipment installation step involves installing communication equipment inside the tunnel that is capable of communicating with a communication network located outside the tunnel, The process includes an access point device installation step of installing multiple access point devices within the aforementioned tunnel, The aforementioned multiple access point devices are, A first access point device having a first wireless communication area, The system includes a second access point device, which is located at a different position from the first access point device and has a second wireless communication area, The aforementioned communication device is connected to the aforementioned multiple access point devices by communication cables so that it can communicate with the aforementioned access point devices. The aforementioned access point device installation process is as follows: A communication cable laying step, which involves laying the communication cable along the tunnel, A first access point device installation step involves installing the first access point device by connecting it to the communication cable laid in the communication cable laying step in a manner that allows it to be attached and detached, The process includes a second access point device installation step, in which the second access point device is installed at a position spaced apart from the first access point device installed in the first access point device installation step, by connecting the second access point device to the communication cable in a manner that allows for easy attachment and detachment. A communication method in a tunnel, wherein the second access point device installation step includes connecting the second access point device to the communication cable at a position spaced apart from the first access point device such that the second wireless communication area overlaps with a part of the first wireless communication area.
The method for communication within a tunnel according to claim 1, further comprising the step of installing a communication confirmation device for checking whether wireless communication is effective within at least one of the first wireless communication area and the second wireless communication area.
The communication method in a tunnel according to claim 1 or 2, wherein the access point device includes an antenna with a variable angle.
The communication confirmation device communicates with a wireless terminal located within at least one of the first wireless communication area and the second wireless communication area. The method for communication in a tunnel according to claim 2, further comprising a warning generation step of issuing a warning if communication between the communication confirmation device and the wireless terminal cannot be confirmed for a predetermined period of time or longer.
The communication method within a tunnel according to claim 4, wherein the warning generation step includes a step of emitting the warning by light.
A communication method within a tunnel according to claim 1 or 2, further comprising the step of installing a camera at a location where it can communicate with the access point device, for photographing a predetermined location within the tunnel.
A communication method within a tunnel according to claim 1 or 2, further comprising the step of installing a plurality of transceivers capable of mutually exchanging voice within the tunnel at a location where they can communicate with the access point device.
The communication method within a tunnel according to claim 7, further comprising a transceiver communication confirmation step that determines whether communication is possible by polling between the installed plurality of transceivers at regular intervals, and issues a warning if it is determined that communication is not possible.
A communication method in a tunnel according to claim 1 or 2, further comprising the step of installing smart glasses that are detachably attached to the human body and capable of capturing images inside the tunnel, at a position where they can communicate with the access point device.
The method for communication within a tunnel according to claim 3, wherein the antenna is capable of transmitting radio waves in both directions along the extension of the tunnel.
The first access point device installation step is performed after the communication equipment installation step, in the communication method within a tunnel according to claim 1 or 2.
The second access point device installation step is performed after the first access point device installation step, wherein the communication method within a tunnel according to claim 1 or 2.
The method for communication within a tunnel according to claim 1 or 2, wherein the access point device installation step includes the step of installing the access point device on the ceiling of the tunnel.
The method for communication within a tunnel according to claim 13, wherein the access point device installation step includes the step of installing the access point device using a hole provided in a frame placed within the tunnel.
The communication method in a tunnel according to claim 13, wherein the access point device installation step includes the step of installing the access point device by bolts so as to suspend it from the ceiling.
A method for laying power cables inside a tunnel, The process of preparing power cables, A conveyor placement step involves placing a conveyor for transporting the power cable inside the tunnel through which the power cable is laid. A power cable laying step is performed in which the power cables are laid sequentially along the tunnel using the conveyor that has been placed in the tunnel by the conveyor placement step, A communication equipment installation step involves installing communication equipment inside the tunnel that is capable of communicating with a communication network located outside the tunnel. The process includes an access point device installation step of installing multiple access point devices within the aforementioned tunnel, The aforementioned multiple access point devices are, A first access point device having a first wireless communication area, The system includes a second access point device, which is located at a different position from the first access point device and has a second wireless communication area, The aforementioned communication device is connected to the aforementioned multiple access point devices by communication cables so that it can communicate with the aforementioned access point devices. The aforementioned access point device installation process is as follows: A communication cable laying step, which involves laying the communication cable along the tunnel, A first access point device installation step involves installing the first access point device by connecting it to the communication cable laid in the communication cable laying step in a manner that allows it to be attached and detached, The process includes a second access point device installation step, in which the second access point device is installed at a position spaced apart from the first access point device installed in the first access point device installation step, by connecting the second access point device to the communication cable in a manner that allows for easy attachment and detachment. The second access point device installation step includes connecting the second access point device to the communication cable at a position spaced apart from the first access point device such that the second wireless communication area overlaps with a part of the first wireless communication area. A method for laying power cables in a tunnel, wherein the power cable laying step includes the step of sequentially laying the power cables in the tunnel using wireless communication within the tunnel using the access point device.
The method for laying power cables in a tunnel according to claim 16, further comprising the step of installing a communication confirmation device for checking whether wireless communication is effective within at least one of the first wireless communication area and the second wireless communication area.
A method for laying power cables inside a tunnel, which involves laying power cables inside the tunnel while monitoring the conditions inside the tunnel, The process of preparing power cables, A conveyor placement step involves placing a conveyor for transporting the power cable inside the tunnel through which the power cable is laid. A power cable laying step is performed in which the power cables are laid sequentially along the tunnel using the conveyor that has been placed in the tunnel by the conveyor placement step, A communication equipment installation step involves installing communication equipment inside the tunnel that is connected to a communication network located outside the tunnel in a manner that enables communication with the tunnel. The process includes an access point device installation step of installing multiple access point devices within the aforementioned tunnel, The aforementioned multiple access point devices are, A first access point device having a first wireless communication area, The system includes a second access point device, which is located at a different position from the first access point device and has a second wireless communication area, The aforementioned access point device installation process is as follows: A communication cable laying process, which involves laying communication cables along the aforementioned tunnel, A first access point device installation step involves installing the first access point device by connecting it to the communication cable laid in the communication cable laying step in a manner that allows it to be attached and detached, The process includes a second access point device installation step, in which the second access point device is installed at a position spaced apart from the first access point device installed in the first access point device installation step, by connecting the second access point device to the communication cable in a manner that allows for easy attachment and detachment. The second access point device installation step includes connecting the second access point device to the communication cable at a position spaced apart from the first access point device such that the second wireless communication area overlaps with a part of the first wireless communication area. A method for laying power cables in a tunnel, comprising the step of sequentially laying the power cables in the tunnel while monitoring whether the power cables are being transported without problems by the conveyor within the tunnel using wireless communication using the access point device.

Description

An application for the application of Article 30, Paragraph 2 of the Patent Law was filed. It was exhibited at JECA FAIR 2024 (the 72nd Electrical Construction Industry Exhibition) from May 29th to 31st, 2024. This disclosure relates to a communication method within a tunnel and a method for laying power cables within a tunnel. Communication equipment used for communication within tunnels is disclosed (see, for example, Patent Document 1). The communication equipment disclosed in Patent Document 1 is used in power cable laying work, where multiple workers sequentially feed power cables shorter than the tunnel length into the tunnel. Japanese Patent Publication No. 2000-312416 Figure 1 is a schematic diagram showing an overview of the communication method and the method of laying power cables inside a tunnel in Embodiment 1.Figure 2 is a schematic diagram showing the configuration of a communication system used in the communication method and power cable laying method within a tunnel in Embodiment 1.Figure 3 is a schematic perspective view showing the external appearance of the first AP device.Figure 4 is a schematic perspective view showing the internal structure of the first AP device.Figure 5 is a schematic perspective view showing the first AP device installed.Figure 6 is a schematic perspective view showing the first AP device installed.Figure 7 is a flowchart showing the main processing flow in the communication method inside the tunnel according to Embodiment 1.Figure 8 is a schematic perspective view of the communication confirmation device when it issues a warning.Figure 9 is a flowchart showing a typical process for laying power cables inside a tunnel. [Description of Embodiments in this Disclosure] (1) The communication method within a tunnel according to the present disclosure comprises a communication equipment installation step of installing communication equipment within the tunnel that is capable of communicating with a communication network located outside the tunnel, and an access point device installation step of installing a plurality of access point devices within the tunnel. The plurality of access point devices include a first access point device having a first wireless communication area and a second access point device located at a different location from the first access point device and having a second wireless communication area. The communication equipment is connected to the plurality of access point devices by communication cables so as to be capable of communicating with the access point devices. The access point device installation step includes a communication cable laying step of laying communication cables along the tunnel, a first access point device installation step of installing the first access point device by detachably connecting it to the communication cable laid by the communication cable laying step, and a second access point device installation step of installing the second access point device by detachably connecting it to the communication cable at a location spaced apart from the first access point device installed by the first access point device installation step. The second access point device installation step includes connecting the second access point device to a communication cable at a location spaced apart from the first access point device such that the second wireless communication area overlaps with a portion of the first wireless communication area. According to the communication method within tunnels described in this disclosure, a wireless communication environment can be secured within the first and second wireless communication areas by utilizing the first and second access point devices installed within the tunnel. This allows workers to communicate with each other using their own wireless mobile devices while working in the tunnel. Therefore, a communication environment can be secured within the tunnel, enabling immediate communication between workers. Of course, in this case, there is no need to install a wired landline telephone, and workers do not need to go to a location where a landline telephone is installed to make contact. Therefore, the effort required for installing landline telephones and the effort required for workers to go to a location where a landline telephone is installed to communicate with each other can be reduced. In summary, this communication method within tunnels allows for efficient communication between workers by securing a communication environment within the tunnel. (2) The above (1) may further include a step of installing a communication confirmation device to check whether wireless communication is enabled or disabled within at least one of the first wireless communication area and the second wireless communication area. By doing so, it is possible to easily determine whether wireless communication is enabled or disabled using the installed communication confirmation device. Therefore, workers can easily rec