WO2017171281A2 - Couvercle de trou d'homme pour surveiller l'état d'une installation souterraine sur la base d'un réseau à zone étendue de faible puissance (lpwa) - Google Patents

Couvercle de trou d'homme pour surveiller l'état d'une installation souterraine sur la base d'un réseau à zone étendue de faible puissance (lpwa) Download PDF

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Publication number
WO2017171281A2
WO2017171281A2 PCT/KR2017/002919 KR2017002919W WO2017171281A2 WO 2017171281 A2 WO2017171281 A2 WO 2017171281A2 KR 2017002919 W KR2017002919 W KR 2017002919W WO 2017171281 A2 WO2017171281 A2 WO 2017171281A2
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WO
WIPO (PCT)
Prior art keywords
manhole cover
antenna
manhole
sensor
space
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Application number
PCT/KR2017/002919
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English (en)
Korean (ko)
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WO2017171281A3 (fr
Inventor
조종화
이슬비
허재회
Original Assignee
주식회사 네이블커뮤니케이션즈
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Priority claimed from KR1020160080435A external-priority patent/KR101880472B1/ko
Application filed by 주식회사 네이블커뮤니케이션즈 filed Critical 주식회사 네이블커뮤니케이션즈
Publication of WO2017171281A2 publication Critical patent/WO2017171281A2/fr
Publication of WO2017171281A3 publication Critical patent/WO2017171281A3/fr

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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a manhole cover for monitoring the status of underground facilities based on low-power wide-area network (LPWAN).
  • LPWAN low-power wide-area network
  • the general manhole management method is that the worker visits the manhole periodically and checks the inside directly, and thus the maintenance cost is high, and there is a risk that the worker has an accident while working inside the manhole.
  • the manhole cover cuts off electric and radio waves due to its material, so in order to collect the measurement result of the sensor installed inside the manhole, the operator opens the manhole cover and releases the radio wave blocking. After that, sensor measurement results should be collected. In this case, the risk of personnel accidents can be reduced, but the maintenance cost is still high.
  • the M2M / IoT-based sewer manhole monitoring system used in a conventional smart building can monitor the change in the amount of water flowing in the sewer pipe, but since it uses a wired communication network, it is difficult to recover in case of a failure in the installation and communication network. .
  • the present invention can provide a system and method for monitoring a manhole internal condition using a manhole cover including a sensor device, a communication device, and an antenna, and wirelessly transmitting the monitoring result, thereby confirming the manhole internal condition without a user's visit. have.
  • the status of the underground facilities according to the LPWA network on the top of the manhole cover Includes a space in which an antenna for transmitting the sensor information of the sensor device for sensing to the monitoring server can be disposed, the lower end of the manhole cover, a buried type that can collect sensor information from the sensor device in accordance with wired or wireless communication
  • the communication device may be arranged, and a hole through which the antenna and the communication device may be connected may be provided at the bottom of the space.
  • the space may be disposed in an intaglio shape at the center of the top of the manhole cover or the top side.
  • the space may be closed by a protective plate for blocking the outside of the manhole cover.
  • the hole penetrates through the manhole cover to transmit sensor information collected by a sensor device sensing the state of the underground facility to the antenna according to wired or wireless communication. It can be configured as a cavity structure.
  • the grating plate structure may include a cross grating plate structure having a plurality of gratings intersecting each other, or a convex grating plate having a grating plate structure that is sealed. It may include a structure.
  • the communication device may be mounted in a DCU (Data Concentrator Unit) case corresponding to the size of the grid and to block physical influences generated outside the manhole cover.
  • DCU Data Concentrator Unit
  • the DCU case may be sealed at the lower end of the manhole cover, and may be mounted open to manage a communication device mounted in the DCU case.
  • the antenna is a LPWA dedicated antenna having a multilayer pattern layer structure, and may transmit a communication signal to a base station of a low power broadband communication network in the form of omni-directional radiation.
  • an inclination sensor capable of measuring the inclination of the manhole cover may be disposed at a lower end of the manhole cover, and the inclination sensor may be part or all of the manhole cover. It may be determined whether the deviation from the.
  • the buried communication device, the sensor device 130 for sensing the state of the underground facilities through a wireless communication method, including RF communication, Bluetooth (BLE) or ZigBee (ZigBee). ) Can be communicated with.
  • RF communication including RF communication, Bluetooth (BLE) or ZigBee (ZigBee).
  • the space disposed on the upper portion of the manhole cover may be filled with a buffer for protecting the antenna from a force applied from the outside of the manhole cover or a material introduced from the outside.
  • the status of the underground facilities according to the LPWA network Receiving sensor information on the underground facility from at least one sensing device, determining the status of the underground facility based on the received sensor information, and transmitting the determined result to a monitoring server.
  • the manhole cover may include a space in which an antenna for transmitting sensor information of a sensor device sensing a state of an underground facility according to the LPWA network to a monitoring server may be disposed on an upper portion of the manhole cover.
  • the bottom of the collects sensor information according to wired communication or wireless communication from the sensor device
  • the communication device of the buried type which can be arranged, the hole in the bottom of the blank space that can be connected to the antenna and the communication apparatus can be provided.
  • the status of underground facilities according to the LPWA network At least one sensor device for sensing, receiving sensor information on the underground facility from the sensor device, determines the state of the underground facility based on the received sensor information, and transmits the determined result to the monitoring server And a monitoring server that receives the determined result from the manhole cover and the manhole cover, and outputs data corresponding to the received result, wherein the manhole cover is located on the top of the manhole cover according to the LPWA network.
  • LPWAN low-power wide-area network
  • the antenna for transmitting the sensor information of the sensor device for sensing the sensor to the monitoring server is arranged Including a space that can be, the bottom of the manhole cover, a buried communication device capable of collecting sensor information from the sensor device in accordance with wired or wireless communication may be disposed, the antenna at the bottom of the empty space And a hole through which the communication device can be provided.
  • the manhole cover may be monitored to monitor the internal state of the manhole, and the monitoring result may be wirelessly transmitted to the server, thereby checking the internal state of the manhole without a user's visit.
  • FIG. 1 is a diagram illustrating a system for monitoring a state of underground facilities using a manhole cover based on a low-power wide-area network (LPWAN) according to an embodiment of the present invention.
  • LPWAN low-power wide-area network
  • FIG. 2 is a view for explaining the configuration of a manhole cover according to an embodiment of the present invention.
  • FIG 3 is a view for explaining the top structure and the bottom structure of the manhole cover according to an embodiment of the present invention.
  • FIG. 4 is a view showing a manhole cover according to an embodiment of the present invention.
  • FIG. 5 is a view showing a manhole cover according to an embodiment of the present invention.
  • FIG. 6 is a view for explaining the form of radiation in the manhole cover according to an embodiment of the present invention.
  • FIG. 7 is a view for explaining the process of monitoring the underground facilities in the manhole cover according to an embodiment of the present invention.
  • FIG. 8 is a view showing the results of monitoring the underground facilities using a manhole cover according to an embodiment of the present invention.
  • FIG. 9 is a view for explaining a process of detecting whether the manhole cover is separated from the manhole according to an embodiment of the present invention.
  • FIG. 10 is a view showing a manhole worker monitoring process according to an embodiment of the present invention.
  • FIG. 11 is a flowchart illustrating a method for monitoring underground facilities using a manhole cover according to an embodiment of the present invention.
  • FIG. 1 is a diagram illustrating a system for monitoring a state of underground facilities using a manhole cover based on a low-power wide-area network (LPWAN) according to an embodiment of the present invention.
  • LPWAN low-power wide-area network
  • the low-power broadband communication network-based manhole cover 100 monitors sensor information of a sensor device 130 that senses a state of underground facilities according to the LPWA network 114 at the top (or LPWA base station 140). It may include a space in which the antenna 110 for transmitting to. At the bottom of the manhole cover 100, a buried communication device 120 capable of collecting sensor information from the sensor device according to wired communication or wireless communication may be disposed.
  • the antenna 110 which may be mounted on the manhole cover 100, may communicate with a monitoring server (or LPWA base station 140) through a low power broadband communication network (LPWAN) 114.
  • LPWAN low power broadband communication network
  • Embedded communication device 120 that can be mounted on the bottom of the manhole cover 100 according to an embodiment is an underground facility through a wireless communication method 123 including RF communication, Bluetooth (BLE) or ZigBee (ZigBee)
  • the sensor device 130 may sense a state of the communication with the sensor device 130.
  • the communication device 120 and the sensor device 130 may communicate with each other via a low power broadband communication network.
  • FIG. 2 is a view for explaining the configuration of a manhole cover according to an embodiment of the present invention.
  • the manhole cover 210 is an antenna 230 for transmitting the sensor information of the sensor device for sensing the state of the underground facilities according to the LPWA network on the top of the manhole cover to the monitoring server It may include a space 220 can be disposed.
  • the space 220 may be provided in an intaglio form at the top center or top side of the manhole cover 210.
  • the space 220 may be provided in a cylindrical shape, and may be provided in a polygonal shape as needed.
  • a buried communication device 232 may be disposed at a lower end of the manhole cover 210 to collect sensor information according to wired or wireless communication from a sensor device sensing a state of an underground facility according to the LPWA network.
  • At least one hole 240 may be provided at the bottom of the space 220.
  • the antenna 230 and the embedded communication device 232 which may be mounted on the manhole cover 210, may be connected through the hole 240.
  • the manhole cover 210 fixes the antenna 230 disposed in the space 220 to the inside of the space 220, and fixes the antenna 230 from a force applied from the outside of the manhole cover 210 or material introduced from the outside. It can be filled with a buffer to protect it.
  • the cushioning material may be made using rubber, plastic or metal.
  • a protective plate for covering one open side of the space 220 may be provided.
  • the open upper portion of the space 220 may be configured in the shape of a groove so that the protective plate does not leave the outside of the manhole cover.
  • the open upper portion of the space 220 may be configured such that the protection plate may have the same height as the outer surface of the manhole cover and cover the open upper portion of the space 220.
  • the hole 240 provided at the bottom of the space 220 may have a cavity structure penetrating the manhole cover to connect the top and bottom of the manhole cover.
  • a wire may pass through the hole 240, and may include a plurality of holes to enable wireless or wired communication between the top and bottom of the manhole cover 210.
  • An antenna 230 may be disposed inside the space 220 of the manhole cover 210.
  • the antenna 230 disposed in the space 220 may exchange data with a monitoring server (or LPWA base station) located outside the manhole.
  • at least one communication device 232 may be disposed at a lower end of the manhole cover 210.
  • the antenna 230 disposed in the space 220 may communicate with the monitoring server using a low-power wide-area (LPWA) network, which is a low power broadband communication technology.
  • LPWA low-power wide-area
  • a sensor device or a communication device 232 may be disposed at the lower end of the manhole cover 210.
  • the sensor information about the underground facilities can be received from at least one sensor device that monitors the condition of the underground facilities existing below the ground surface.
  • the sensor device for monitoring the condition of the underground facility may include at least one of a methane gas measurement sensor, a temperature sensor and a water level measurement sensor.
  • FIG 3 is a view for explaining the top structure and the bottom structure of the manhole cover according to an embodiment of the present invention.
  • FIG 3 illustrates a side view of the manhole cover 300, a plan view 301 viewed from the top of the manhole cover, and a bottom view 302 viewed from the bottom of the manhole cover.
  • the manhole cover 300 may include an intaglio-shaped space having an upper portion open at the top thereof.
  • the antenna 310 may be disposed in such a recessed space.
  • the antenna 310 may transmit sensor information of the sensor device 130 that senses the state of the underground facility according to the LPWA network 114 to the monitoring server (or the LPWA base station 140).
  • An engraved space in which the antenna 310 may be disposed may be provided at the top center or top side of the manhole cover 300 according to the support load, durability, and construction environment of the manhole cover 300.
  • at least one hole 320 may be provided at a lower end of a space where the antenna 310 may be disposed.
  • the antenna 310 that may be disposed on the top of the manhole cover 300 and the buried communication device that may be disposed on the bottom of the manhole cover 300 may be connected by wire or wireless communication through the hole 320.
  • the top or bottom of the manhole cover 300 may be composed of a grating plate structure 330 composed of a plurality of gratings.
  • the grid plate structure 330 may improve convenience of work and durability of the manhole cover 300.
  • a buried communication device capable of collecting sensor information from the sensor device according to wired or wireless communication may be disposed.
  • a buried communication device corresponds to the grid size of any one of the plurality of grids constituting the lower end of the manhole cover 300, and the DCU (Data) for blocking the physical influence generated outside the manhole cover 300 Concentrator Unit) can be mounted in the case.
  • a communication device including a DCU device, an LPWA communication module, a battery for supplying power, and the like may be disposed.
  • the communication device disposed in the DCU case may be used to manage sensing data collection information and manhole state information.
  • the DCU case may be completely sealed with the manhole cover 300.
  • the DCU case can be mounted open to check the status of the DCU device and the LPWA communication module and to replace the battery or parts.
  • there is an environmental sensor that can check the condition of the manhole cover. Can be arranged.
  • the environmental sensor may check the temperature of the manhole cover, the humidity around the manhole cover, the temperature or humidity inside the DCU case.
  • FIG. 4 is a view showing a manhole cover according to an embodiment of the present invention.
  • FIG. 4 is a view illustrating a commercially available manhole cover, a manhole cover 400 including an engraved space 401 having an upper portion open at an upper end thereof, and a manhole cover 410 having an antenna 411 disposed in an engraved space. ) And a manhole cover 420 having a protective plate 421 for closing the engraved space.
  • the engraved space 401 provided at the top center of the manhole cover may be used as a space into which the LPWA cavity antenna 411 is inserted.
  • the LPWA cavity antenna 411 is disposed in the engraved space 401.
  • the manhole cover may include a protective plate 421 to protect the antenna 411 disposed in the engraved space 401 from external force or foreign matter.
  • FIG. 5 is a view showing a manhole cover according to an embodiment of the present invention.
  • the manhole cover 510 may include a manhole cover 510, a communication device 520, and a protective plate 530, as shown in FIG. 5.
  • the manhole cover 510 is a lid covering the manhole, and as shown in FIG. 5, the manhole cover 510 may include an intaglio-shaped space 511 having an upper portion open at the top center thereof.
  • the manhole cover 510 may be an LPWA communication-only manhole cover, and may include an LPWA communication antenna in an engraved space 511 provided at the top center or top side of the manhole cover 510.
  • the antenna 520 may be configured as an LPWAN communication module, and may be disposed in a space provided on one side of the manhole cover 510.
  • the antenna 520 may be an LPWA cavity antenna capable of communicating with a base station located outside in the LPWA communication method.
  • At least one sensor may be further included in the space 511 in which the antenna 520 is disposed.
  • a tilt sensor may be included to measure a tilt between the manhole cover and the manhole.
  • the protection plate 530 may serve to fix and protect the antenna 520 disposed in the space provided on one side of the manhole cover 510 to the manhole cover 510.
  • the protective plate 530 is a protective cover protecting the LPWA cavity antenna 520, and a space 531 may be provided inside the protective plate 530 to include the LPWA cavity antenna 520.
  • the overall shape of the protective plate 530 may be configured in a form corresponding to the space provided on one side of the manhole cover 510. Since the manhole cover 510 of FIG. 5 has a cylindrical space at the top, the overall shape of the protective plate 530 may also be configured in a cylindrical shape. When the shape of the space provided on one side of the manhole cover 510 is a square pillar shape, the overall shape of the protective plate 530 may also be configured in a square pillar shape corresponding thereto.
  • FIG. 6 is a view for explaining the form of radiation in the manhole cover according to an embodiment of the present invention.
  • the manhole cover may include an antenna based on a low power broadband communication network.
  • the antenna may exchange data with a low power broadband communication base station (or monitoring server) using a low power broadband communication method.
  • the antenna 600 is a LPWA dedicated antenna having a multilayer pattern layer structure, and may transmit a communication signal to a base station 610 of a low power broadband communication network in the form of omni-directional radiation.
  • An antenna that may be disposed in the manhole cover includes a dipole antenna, a monopole antenna, a helical antenna, and the like, in which a radiation pattern is constant in all directions on a single plane.
  • FIG. 7 is a view for explaining the process of monitoring the underground facilities in the manhole cover according to an embodiment of the present invention.
  • the manhole cover 710 measures depth of sewage, sewage, soil, excreta, foreign substances, etc. using at least one sensor 720, or monitors the water level inside the manhole, gas leakage, and the like. Can be used.
  • At least one sensor located inside the manhole may be connected to the manhole cover 710 by wire or wireless communication.
  • the at least one sensor may be installed in an underground facility located below the ground surface and may communicate with the manhole cover using wireless communication. Sensors using wireless communication can be installed in locations that are difficult for users to monitor, and can continuously monitor the condition of underground facilities.
  • the manhole cover 710 may receive state information of the underground facility from at least one sensor for monitoring the underground facility.
  • the state information obtained using at least one wired or wireless sensor may be received through communication equipment mounted on the manhole cover 710.
  • FIG. 8 is a view showing the results of monitoring the underground facilities using a manhole cover according to an embodiment of the present invention.
  • Monitoring server may receive the state information of the underground facilities from a plurality of manhole cover at regular intervals, through which it is possible to continuously monitor the state inside the manhole where the manhole is located.
  • the monitoring system 800 of FIG. 8 illustrates a result of periodically monitoring the amount of sewage of a manhole located in a specific area. For example, it is possible to periodically receive status information on the current amount of sewage in each manhole from the manhole covers 801 to 808 located in Imae-dong, Bundang-gu, Seongnam-si. According to the information 808 received from the eighth manhole cover, it can be confirmed that the amount of sewage inside the eighth manhole (Imae-dong 99 Manga 2 manhole) is in a dangerous state as 70%.
  • the monitoring server may generate a report including the location of each manhole cover and a measurement time, based on the state information of the underground facilities received from the plurality of manhole covers, as shown in FIG. 8. .
  • FIG. 9 is a view for explaining a process of detecting whether the manhole cover is separated from the manhole according to an embodiment of the present invention.
  • the manhole cover may include an inclination sensor capable of measuring an inclination of the manhole cover 910.
  • the manhole cover 910 may include a three-axis sensor 920.
  • the 3-axis sensor 920 may determine whether the manhole cover 910 is opened by measuring the inclination of the manhole cover 910.
  • the three-axis sensor 920 may measure the changed inclination of the manhole cover 910.
  • the manhole cover 910 may transmit the inclination measured by the three-axis sensor 920 to the monitoring server.
  • the monitoring server may include a database in which information on a work schedule for each manhole is stored.
  • the monitoring server may determine whether there is a scheduled work schedule in relation to the manhole cover in which the tilt change is detected, and detect whether the manhole cover in which the tilt change has occurred is stolen. For example, when there is no scheduled work schedule with respect to the manhole cover in which the tilt change is detected, it may be determined that the theft of the manhole cover has occurred. In this case, the monitoring server may output a warning alarm notifying the manager that the theft of the manhole cover 910 is occurring, and may provide a location of the manhole cover 910.
  • the monitoring server provides the user with a report 930 displaying the manhole cover 910 determined to have been stolen in a different color from the other manhole covers, so that the user can easily identify the manhole cover 910 where theft has occurred. Can be. For example, it may be confirmed that the inclination of the eighth manhole 938 is changed among the eight manhole covers 931 to 938.
  • the work schedule history 940 stored in the database of the monitoring server may be checked to determine whether the change in the slope of the manhole cover is a change in the slope according to the scheduled work.
  • FIG. 10 is a view showing a manhole worker monitoring process according to an embodiment of the present invention.
  • the manhole worker may wear a wearable device 1010 that may be worn on the body as shown in FIG. 10.
  • the wearable device 1010 may measure state information such as a heart rate and a body temperature of an operator, and transmit the measured information through a wireless communication network.
  • the manhole cover may transmit the state information of the worker sent by the wearable device 1010 to the outside using the LPWAN communication module provided in the manhole cover.
  • the state information of the worker transmitted through the manhole cover may be transmitted to the monitoring server through the base station 1020.
  • the manhole cover may transmit the state information of the worker measured by the wearable device 1010 to the monitoring server.
  • the monitoring server may provide the manager with a report 1030 including the names and status information of the workers, so that the manager can check the status of the workers in real time.
  • the report 1030 may be displayed on the mobile terminal possessed by the worker, as shown in FIG. 10. If an abnormality occurs in the body of the worker during the operation, the rescue may be requested by clicking the 119 report or cooperation request icon of the report 1030 displayed on the mobile terminal.
  • FIG. 11 is a flowchart illustrating a method for monitoring underground facilities using a manhole cover according to an embodiment of the present invention.
  • sensor information on the underground facility may be received from at least one sensor device that senses the status of the underground facility according to the LPWA network.
  • the sensor device may be installed in the underground facility to periodically acquire status information of the underground facility.
  • the obtained state information may be transmitted to a communication device disposed in the manhole cover using a wireless communication or a wired communication scheme.
  • the communication device may be disposed at the bottom of the manhole cover.
  • the communication device disposed in the manhole cover may serve to receive radio waves generated in the manhole and transmit the radio waves to the outside of the manhole cover.
  • the communication device disposed at the bottom of the manhole cover may communicate with the antenna disposed at the top of the manhole cover through at least one hole passing through the manhole cover.
  • the at least one hole provided in the manhole cover is configured in the form of a hole penetrating the manhole cover so that the antenna disposed at the top of the manhole cover and the communication device disposed at the bottom may be connected in a wired communication manner.
  • the at least one hole provided in the manhole cover may be configured in such a manner that a radio wave transmissive material fills the at least one hole.
  • the antenna disposed on the upper portion of the manhole cover and the communication device disposed on the lower portion may be formed by a wireless communication method. Can be connected.
  • the state of the underground facility may be determined based on the received state information of the underground facility.
  • the operation of determining the state of the underground facility in the manhole cover may be performed by whether or not the state of the underground facility exceeds a threshold preset by the administrator. For example, when monitoring the water level of the sewer pipe through the manhole cover, it is possible to receive the water level information of the sewer pipe from the water level measurement sensor installed inside the manhole. The received water level information of the sewer pipe may be used to determine whether or not to exceed the value preset by the administrator.
  • the manhole cover may transmit the determined result to an external monitoring server through an antenna mounted on the manhole cover.
  • An antenna disposed on the manhole cover may communicate with the monitoring server based on the LPWA network.
  • the monitoring server that receives the status information on the underground facility through the antenna disposed on the manhole cover may output the received information to the manager.
  • the method according to various embodiments may be embodied in the form of program instructions that may be executed by various computer means and recorded on a computer readable medium.
  • the computer readable medium may include program instructions, data files, data structures, etc. alone or in combination.
  • the program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks.
  • Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.
  • the hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Abstract

Un couvercle de trou d'homme pour surveiller l'état d'une installation souterraine sur la base d'un réseau à zone étendue de faible puissance (LPWAN) selon un mode de réalisation de la présente invention comprend : un espace, formé dans l'extrémité supérieure du couvercle de trou d'homme, à l'intérieur duquel peut être placée une antenne utilisée pour transmettre, à un serveur de surveillance, des informations de capteur d'un dispositif capteur détectant l'état de l'installation souterraine via le réseau LPWA ; agencées; un trou, formé dans l'extrémité inférieure du couvercle de trou d'homme, dans lequel peut être placé un dispositif de communication enterré apte à collecter les informations de capteur du dispositif capteur via une communication filaire ou une communication sans fil peut être agencé, et à travers lequel une antenne peut être connectée à un dispositif de communication à l'extrémité inférieure de l'espace.
PCT/KR2017/002919 2016-03-31 2017-03-20 Couvercle de trou d'homme pour surveiller l'état d'une installation souterraine sur la base d'un réseau à zone étendue de faible puissance (lpwa) WO2017171281A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20160039532 2016-03-31
KR10-2016-0039532 2016-03-31
KR10-2016-0080435 2016-06-27
KR1020160080435A KR101880472B1 (ko) 2016-03-31 2016-06-27 LPWA(Low-Power Wide-Area) 네트워크 기반의 지하시설물 상태 모니터링을 위한 맨홀 커버

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WO2017171281A2 true WO2017171281A2 (fr) 2017-10-05
WO2017171281A3 WO2017171281A3 (fr) 2018-08-02

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CN111896043A (zh) * 2020-06-05 2020-11-06 北京无线电计量测试研究所 一种窨井故障定位系统及窨井故障定位方法
US10909830B1 (en) 2017-11-07 2021-02-02 Pica Product Development, Llc Personal emergency alert system, method and device
DE102019127486A1 (de) * 2019-10-11 2021-04-15 ACO Severin Ahlmann GmbH & Co Kommanditgesellschaft Schachtrahmen und Schachtabdeckung

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