EP3904268B1 - Steuerungssysteme für einen aufzug - Google Patents

Steuerungssysteme für einen aufzug Download PDF

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Publication number
EP3904268B1
EP3904268B1 EP21180578.3A EP21180578A EP3904268B1 EP 3904268 B1 EP3904268 B1 EP 3904268B1 EP 21180578 A EP21180578 A EP 21180578A EP 3904268 B1 EP3904268 B1 EP 3904268B1
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Prior art keywords
data
elevator
communication device
escalator
cloud server
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EP21180578.3A
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English (en)
French (fr)
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EP3904268A1 (de
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Adrian Bünter
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Inventio AG
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Inventio AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3415—Control system configuration and the data transmission or communication within the control system
    • B66B1/3423—Control system configuration, i.e. lay-out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3415—Control system configuration and the data transmission or communication within the control system
    • B66B1/3446—Data transmission or communication within the control system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B25/00—Control of escalators or moving walkways

Definitions

  • the present invention relates to the field of elevator and escalator devices. More specifically, it relates to a communication device, a method and a system for communicating between a core controller associated with an elevator or escalator device and a cloud server.
  • control software is stored and operated locally on a control board at each instance or installation. Adding or modifying functionality requires service personnel to manually update the software on the control board or download the software to a local unit via a remote connection.
  • a software upgrade may require a corresponding processor and memory upgrade.
  • Controller software might not be automatically upgraded unless manually executed at a user's request. Future functionality may someday reach the memory and computing power resource limitations in the existing control boards. At that point, a user may have to elect to forego incorporating additional functionality or otherwise incur large expenses upgrading a supporting hardware platform.
  • US 9067760 B2 describes a method for communication between an elevator system and a remote control center, that includes establishing a communication connection in a communication network.
  • a first signal of the elevator system is received by a communication device of the elevator system through a signal network, and a second signal is transmitted by the communication device in the communication network to a computing apparatus of the remote control center.
  • the communication connection is permanently maintained.
  • JP 2014 172714 A discloses an elevator system with certain control functionalities that are implemented in a cloud computing system.
  • Such improvements shall in particular concern integrity of the systems communication devices as well as security of data that is communicated between the different communication entities of the system.
  • the invention is directed to a method according to claim 1.
  • the invention is directed to a communication device with at least one microprocessor; at least one cryptoprocessor; and memory having instructions stored thereon that, when executed by the at least one microprocessor and the at least one cryptoprocessor, cause the communication device to at least one of: receive from a cloud server or a backend computer encrypted data that is configured to at least control core operations associated with an elevator or escalator device, decrypt the data, and distribute the data over at least one data connection between the communication device and at least one core controller associated with an elevator or escalator device to said at least one core controller to be used by said controller to control core operations associated with said elevator or escalator device, or receive control feedback data over at least one data connection between the communication device and at least one core controller associated with an elevator or escalator device to said at least one core controller, encrypt the data, and send the encrypted data to a cloud server or a backend computer.
  • a third aspect of the invention is directed to a system comprising: a first plurality of elevator or escalator devices; at least one core controller configured to control operations associated with the first plurality of elevator or escalator devices; a cloud server; and a first communication device linked to the at least one first core controller.
  • Encrypting the data which is communicated between the communication devices allows to maintain the security level obtained with conventionally controlled elevator and escalator devices even when control over non-core functionalities are moved or relocated to remote devices or into the cloud in general.
  • connections are set forth between elements in the following description and in the drawings (the contents of which are included in this disclosure by way of reference). It is noted that these connections in general and, unless specified otherwise, may be direct or indirect and that this specification is not intended to be limiting in this respect. In this respect, a coupling between entities may refer to either a direct or an indirect connection. Some connections are marked with an open or closed lock symbol, exemplarily indicating that information and data transported over these connections is encrypted (locked) or unencrypted (open).
  • Exemplary embodiments of apparatuses, systems, and methods are described for maintaining, updating/modifying, and upgrading an elevator system.
  • functionality typically associated with an elevator controller may be located in another device or entity, such as a smart communication gateway or on a cloud server.
  • the elevator controller may communicate with the smart communication gateway and the cloud server to support selected control functions.
  • cloud or cloud computing shall in this specification have the meaning of internet-based computing that provides shared computer processing resources and data to computers and other devices on demand.
  • a cloud server is a computer device (server) that is connected to and can be contacted over the internet or any other comparable dedicated or open communication network.
  • Fig 1 shows an exemplary elevator system comprising several elevators 31 through 36 grouped in two exemplary groups of elevators.
  • a first group of elevators comprises an exemplary number of three elevators 31, 32 and 33, with dedicated core controllers 21, 22, 23.
  • Each core controller controls at least core functionalities of the elevator that it is connected to.
  • the three core controllers 21, 22 and 23 are connected to a first smart communication gateway, which is a communication device 11 with a memory, at least one microprocessor and interfaces to connect to input/ output (I/O) devices and/ or a cloud 5 and at least one remote cloud server 6 or at least one backend computer device 4.
  • I/O input/ output
  • a second group of elevators comprises again an exemplary number of three elevators 34, 35 and 36, with one common core controller 24.
  • the common core controller controls at least core functionalities of the three elevators.
  • the common core controller 24 is connected to a second smart communication gateway, which again is a communication device 12 with a memory, at least one microprocessor and interfaces to connect to I/O devices and/ or a cloud 5 and at least one remote cloud server 6 or at least one backend computer device 4.
  • the elevator system as shown if Fig. 1 is illustrative. In some embodiments, one or more of the entities may be optional. In some embodiments, additional entities not shown may be included. For example, in some embodiments the elevator system may be associated with one or more networks, such as one or more computer or telephone networks. In some embodiments, the entities may be arranged or organized in a manner different from what is shown in FIG. 2 .
  • the system may include one or more elevators, such as elevators 31 to 36.
  • the elevators 31, 32 and 33 may be included in a first elevator group 3.
  • the elevators 34, 35 and 36 may be included in a second elevator group.
  • the first elevator group may include some or all of the elevators at a particular location, such as a building and the second elevator group may include some or all of the elevators at another particular location, such as another building.
  • an elevator group may include more or less than three elevators.
  • the elevator group may include one or more core controllers, such as dedicated core controllers 21, 22 and 23 for the first elevator group and a common core controller 24 for the second elevator group.
  • core controller 21 may be associated with elevator 31
  • core controller 22 may be associated with elevator 32
  • core controller 23 may be associated with elevator 33.
  • core controllers are combined, such that a common core controller 24 may be associated with all of the three elevators 34, 35 and 36.
  • a controller may have been responsible for the operation of an elevator or a group of elevators.
  • a controller includes all the hardware and software needed to implement control functionality with respect to elevators that were overseen or regulated by the controller.
  • selected controller functionality may be moved or relocated from a controller to another entity, such as a communication device or a cloud server.
  • another entity such as a communication device or a cloud server.
  • controller design may be simplified, which may result in a more reliable core controller.
  • Changes in functionality may also be made at one central location, the cloud server, resulting in a consistent implementation across multiple controllers and/or elevator groups simultaneously and without requiring manual intervention at a local site, at the elevator or the elevator group.
  • elevator groups may be remotely located from one another, for example in different buildings.
  • the core controllers of the elevators or the elevator groups may communicate with the cloud server via a communication device (smart communication gateway) over one or more connections, channels, or links.
  • a communication device such connections may adhere to one or more communication protocols, standards, or the like.
  • the connections may adhere to landline telephone, cellular (GSM, UMTS, LTE or any future mobile cellular system standard), wireless local area networking (Wi-Fi), Ethernet (local (LAN), metropolitan (MAN) or wide (WAN) area network), satellite, or cable communications.
  • the connections may be constant or persistent.
  • the communication device 1, 11, 12 may take over some of the functionality of the controller known from the conventional systems and thereby become part of the controller itself.
  • the communication device may receive encrypted data from the cloud or a cloud server, which data is, when decrypted by the communication device and executed on the communication, configured to control core operations associated with an elevator or an elevator group. Therefore, and in accordance with an embodiment of this disclosure, control data is forwarded to the at least one core controller by the communication device.
  • Controller functionality other than core controller functionality may be executed on a cloud server.
  • Such functionality may include non-core functions for an elevator or a group of elevators, operational mode determinations, diagnostic functions, special contract features, etc.
  • non-core functions in some embodiments a user request for service received at, e.g., a hall box located on a particular floor of a building may be communicated to the cloud server and the cloud server may transmit a command to the core controller that eventually directs a specified elevator car to relocate to that particular floor to fulfill the service request.
  • a local core controller associated with an elevator or a group of elevators may maintain some functionality, and as such, may include hardware and computing resources to support such functionality, especially core functionality like accelerating, decelerating, braking, resulting in movement at specific speeds in upward or downward directions, other core functionality like opening and closing doors and, in particular, safety relevant functionality.
  • a core controller may include hardware and/or software to communicate with a cloud server via a communication device (smart communication gateway). For example, a core controller may exchange data and commands with the cloud server to perform control functions.
  • the cloud server may store contract setup parameters for select functions. In some embodiments, the contract setup parameters may be stored in the core controller. In some embodiments, there may be a simplified failover functionality located in the core controller in the event that there is a connection loss between the core controller and the communication device and/ or the communication device and the cloud server.
  • operational metrics from elevators may be collected at a cloud server across a portfolio of multiple units, sites, or groups.
  • the metrics may be filtered at a communication device linked to the core controller of an elevator or a group of elevators, encrypted for secure communication by the communication device, forwarded to, decrypted and analyzed by cloud services or a backend computer to provide a broad view of the portfolio.
  • Metrics may be used to create insights that can be turned into actions that provide real business outcomes. For example, the analysis may indicate trends and may be used to respond to needs. The analysis may also be used to facilitate diagnostic or troubleshooting capabilities. Metrics may be used to trigger or enhance the accuracy of sales proposals. Metrics may be used to provide or schedule maintenance activities, such as preventative maintenance activities.
  • interface protocols for, e.g., new devices may be stored in a cloud server and used by a communication device and/ or a local core controller.
  • functional upgrades for diagnostics, prognostics, and remote repair/rescue functions can be deployed to customers as they are released and deployed into a cloud server.
  • Functionality may be developed at the backend computer and deployed to the cloud server.
  • One or more tests may be executed to ensure that the functionality satisfies operational or safety requirements.
  • a modernization of cloud supported core controllers may be provided.
  • Core controllers may utilize a cloud or cloud server to enable new features or support new devices/equipment.
  • the communication device linked to the core controller may receive updates via the cloud to support interface protocols to new equipment and/or add new functions/capabilities. For example, if a new fixture is added requiring a new interface, a core controller may enable the new functionality from the cloud once the new fixture has been integrated into the system without requiring an upgrade of software on the core controller.
  • a new core algorithm may be implemented from the cloud to optimize traffic during the modernization phase of the project.
  • Fig 2 shows an exemplary communication system which includes a communication device 1, above also referred to as smart communication gateway.
  • the communication device 1 comprises memory 103 for storing executable instructions and data.
  • the executable instructions may be stored or organized in any manner and at any level of abstraction, such as in connection with one or more processes, routines, procedures, methods, functions, etc.
  • the instructions stored in the memory 103 may be executed by one or more microprocessors, such as a main processor unit 101.
  • the processor may be coupled to one or more I/O devices 15 by means of exemplary first communication interface 106.
  • the I/O device(s) 15 may include one or more of a keyboard or keypad, a touchscreen or touch panel, a display screen, a microphone, a speaker, a mouse, a button, a remote control, a joystick, a printer, a telephone or mobile device (e.g., a smartphone), etc.
  • the I/O device(s) 15 may be configured to provide an interface to allow a user to interact with the communication device 1.
  • the device has several communication interfaces 105 to 107.
  • An exemplary second communication interface 105 connects the communication device to the cloud.
  • Exemplary third communication interface 107 connect the communication device to the at least one core controller of an associated elevator or group of elevators.
  • the communication device 1 further comprises a cryptoprocessor 102, which is a dedicated microcontroller designed to secure the hardware of the communication device 1 by integrating cryptographic keys into the device.
  • a cryptoprocessor is commonly known as Trusted Platform Module.
  • the cryptoprocessor has the primary scope to assure integrity of the communication device within an elevator communication system comprising several components in remote locations, such as elevators, groups of elevators, core controllers of elevators, core controllers of groups of elevators, communication devices (smart communication gateways), cloud servers, backend computers, etc.
  • Communication to and from the elevator core controller(s) through the communication device 1 is encrypted/ decrypted using the cryptoprocessor 102.
  • Communication content integrity and security, as well as system components identity authentication can be further improved with the use of cryptoprocessors.
  • integrated means "behave as intended”.
  • secure cryptoprocessors, or dedicated microcontroller designed to secure hardware by integrating cryptographic keys into devices in general access to the communication system is less prone to "dictionary attacks" compared to pure software implemented authentication mechanisms.
  • a dictionary attack prevention mechanism is created, which effectively protects against guessing or automated dictionary attacks. Without this level of protection, only passwords with high complexity would provide sufficient protection.
  • Embodiments of the disclosure may be used to reduce local controller hardware and/or software.
  • functionality may be at least partially supported by one or more servers, such as one or more cloud servers.
  • Increased or upgraded functionality may be provided without impacting local controller memory or processing requirements/capacities.
  • Embodiments of the disclosure may have high-level control functionality implemented remote from an elevator. Functionality may be modified off-line. Functionality may be pushed from a cloud server to one or more elevators once the functionality is available. In some embodiments, an elevator may be configured to request functionality via, e.g., a pull-model.
  • Embodiments of the disclosure may be tied to one or more particular machines.
  • a controller may be configured to communicate with a cloud server.
  • the cloud server may store data that may be used to control one or more functions associated with an environment or application.
  • the data may be communicated from the cloud server to the controller to support operations within the environment or application.
  • various functions or acts may take place at a given location and/or in connection with the operation of one or more apparatuses, systems, or devices. For example, in some embodiments, a portion of a given function or act may be performed at a first device or location, and the remainder of the function or act may be performed at one or more additional devices or locations.
  • an apparatus or system may include one or more processors, and memory storing instructions that, when executed by the one or more processors, cause the apparatus or system to perform one or more methodological acts as described herein.
  • Various mechanical components known to those of skill in the art may be used in some embodiments.
  • Embodiments may be implemented as one or more apparatuses, systems, and/or methods.
  • instructions may be stored on one or more computer program products or computer-readable media, such as a transitory and/or non-transitory computer-readable medium.
  • the instructions when executed, may cause an entity (e.g., an apparatus or system) to perform one or more methodological acts as described herein.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)

Claims (15)

  1. Verfahren, umfassend die Schritte:
    Empfangen, durch eine Kommunikationsvorrichtung (1, 11, 12), die mit mindestens einer Kernsteuerung (21, 22, 23, 24) verknüpft ist, die einer Aufzug- oder Rolltreppenvorrichtung (31, 32, ..., 36) zugeordnet ist, von verschlüsselten Daten von einem Cloud-Server (6), die ausgestaltet sind, um Vorgänge zu steuern, die der mindestens einen Aufzug- oder Rolltreppenvorrichtung (31, 32, ..., 36) zugeordnet sind,
    Entschlüsseln der Daten mit einem Kryptoprozessor (102) auf der Kommunikationsvorrichtung (1, 11, 12); und
    Weiterleiten der entschlüsselten Daten von der Kommunikationsvorrichtung (1, 11, 12) an die mindestens eine Kernsteuerung (21, 22, 23, 24), die der Aufzug- oder Rolltreppenvorrichtung (31, 32, ..., 36) zugeordnet ist.
  2. Verfahren nach Anspruch 1, ferner umfassend den Schritt:
    Empfangen, durch den Cloud-Server (6), der verschlüsselten Daten von einem Back-End-Computer (4).
  3. Verfahren nach Anspruch 1, wobei die Aufzug- oder Rolltreppenvorrichtung (31, 32, ..., 36) in einer Gruppe von Aufzug- oder Rolltreppenvorrichtungen (31, 32, ..., 36) eingeschlossen ist.
  4. Verfahren nach Anspruch 3, wobei die Kernsteuerung (21, 22, 23, 24) jede der Aufzug- oder Rolltreppenvorrichtungen (31, 32, ..., 36) gemäß den Daten steuert.
  5. Verfahren nach Anspruch 1, ferner umfassend den Schritt:
    Erhalten, durch die Kommunikationsvorrichtung (1,11, 12), von zweiten Daten bezüglich eines Status einer Implementierung der Daten und/oder zweiter Daten bezüglich der Verwendung der Daten von der Kernsteuerung (21, 22, 23, 24);
    Verschlüsseln der zweiten Daten mit einem Kryptoprozessor (102) auf der Kommunikationsvorrichtung (1, 11, 12); und
    Weiterleiten der entschlüsselten zweiten Daten von der Kommunikationsvorrichtung (1, 11, 12) an einen Cloud-Server (6) und/oder einen Back-End-Computer (4).
  6. Verfahren nach Anspruch 1, ferner umfassend den Schritt:
    Manipulieren und/oder Analysieren und/oder Filtern der zweiten Daten.
  7. Verfahren nach Anspruch 6, wobei das Manipulieren und/oder Analysieren und/oder Filtern der zweiten Daten durch die Kommunikationsvorrichtung (1,11, 12) und/oder den Cloud-Server (6) erfolgt.
  8. Kommunikationsvorrichtung (1,11, 12) mit mindestens einem Mikroprozessor und Speicher, gekennzeichnet durch mindestens einen Kryptoprozessor (102) und dadurch, dass der Speicher darauf gespeicherte Anweisungen aufweist, die, wenn sie durch den mindestens einen Mikroprozessor und den mindestens einen Kryptoprozessor (102) ausgeführt werden, die Kommunikationsvorrichtung (1, 11, 12) zu mindestens einem veranlassen von:
    Empfangen von verschlüsselten Daten von einem Cloud-Server (6) oder einem Back-End-Computer (4), die ausgestaltet sind, um mindestens Steuerkernvorgänge zu empfangen, die einer Aufzug- oder Rolltreppenvorrichtung (31, 32, ..., 36) zugeordnet sind, Entschlüsseln der Daten und
    Verteilen der Daten über mindestens eine Datenverbindung zwischen der Kommunikationsvorrichtung (1, 11, 12) und mindestens einer Kernsteuerung (21, 22, 23, 24), die einer Aufzug- oder Rolltreppenvorrichtung (31, 32, ..., 36) zugeordnet ist, an die mindestens eine Kernsteuerung (21, 22, 23, 24), die durch die Steuerung verwendet werden sollen, um Kernvorgänge zu steuern, die der Aufzug- oder Rolltreppenvorrichtung (31, 32, ..., 36) zugeordnet sind, oder
    Empfangen von Steuerrückkopplungsdaten über mindestens eine Datenverbindung zwischen der Kommunikationsvorrichtung (1, 11, 12) und mindestens einer Kernsteuerung (21, 22, 23, 24), die einer Aufzug- oder Rolltreppenvorrichtung (31, 32, ..., 36) zugeordnet ist, an die mindestens eine Kernsteuerung (21, 22, 23, 24), Verschlüsseln der Daten und
    Senden der verschlüsselten Daten an einen Cloud-Server (6) oder einen Back-End-Computer (4).
  9. Kommunikationseinrichtung, umfassend eine Kommunikationsvorrichtung (1, 11, 12) nach Anspruch 8, wobei die Einrichtung ferner einen Cloud-Server (6) umfasst.
  10. Kommunikationseinrichtung nach Anspruch 9, wobei die Daten als ein Softwareprogramm implementiert werden und wobei die Einrichtung das Softwareprogramm von einem Back-End-Computer (4) empfängt.
  11. Kommunikationseinrichtung nach Anspruch 10, wobei das Softwareprogramm verwendet wird, um die in dem Speicher der Kommunikationsvorrichtung (1, 11, 12) gespeicherten Anweisungen zu ändern.
  12. Kommunikationseinrichtung, umfassend eine Kommunikationsvorrichtung (1, 11, 12) nach Anspruch 8, wobei die Datenverbindung, um die Daten an die Kernsteuerung zu verteilen, mindestens eines ist von: einer analogen Telefonverbindung, einer digitalen zellularen Kommunikationsverbindung, einer WLAN-Verbindung, einer Ethernet-Verbindung, einer Satellitenverbindung und einer Kabelkommunikationsverbindung.
  13. System, umfassend:
    eine erste Vielzahl von Aufzug- oder Rolltreppenvorrichtungen (31, 32, ..., 36);
    mindestens eine Kernsteuerung (21, 22, 23, 24), die ausgestaltet ist, um Vorgänge zu steuern, die der ersten Vielzahl von Aufzug- oder Rolltreppenvorrichtungen (31, 32, ..., 36) zugeordnet sind;
    einen Cloud-Server (6); und
    eine erste Kommunikationsvorrichtung (1, 11, 12) nach Anspruch 8, die mit der mindestens einen ersten Kernsteuerung (21, 22, 23, 24) verknüpft ist.
  14. System nach Anspruch 13, ferner umfassend:
    eine zweite Vielzahl von Aufzug- oder Rolltreppenvorrichtungen (31, 32, ..., 36), die sich von der ersten Vielzahl von Aufzug- oder Rolltreppenvorrichtungen (31, 32, ..., 36) entfernt befindet; und
    eine zweite Kommunikationsvorrichtung (1, 11, 12), die mit mindestens einer zweiten Kernsteuerung verknüpft ist, die ausgestaltet ist, um mindestens Kernvorgänge zu steuern, die der zweiten Vielzahl von Aufzug- oder Rolltreppenvorrichtungen (31, 32, ..., 36) zugeordnet sind.
  15. System nach Anspruch 14, wobei der Cloud-Server (6) ausgestaltet ist, um verschlüsselte Daten an die zweite Kommunikationsvorrichtung (1, 11, 12) im Wesentlichen zu der gleichen Zeit zu verteilen, zu der der Cloud-Server (6) die verschlüsselten Daten an die erste Kommunikationsvorrichtung (1, 11, 12) verteilt.
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CN109823952B (zh) * 2019-03-20 2023-12-05 杭州地铁运营有限公司 一种车站电扶梯导向控制板
US20220219942A1 (en) 2019-05-29 2022-07-14 Inventio Ag Elevator system with a multipurpose edge-gateway and method for data communication
EP3915912A1 (de) * 2020-05-29 2021-12-01 KONE Corporation Personenbeförderungssystem und verfahren zur aktualisierung der software eine personenbeförderungskomponente in einem personenbeförderungssystem
KR102497834B1 (ko) 2020-06-19 2023-02-08 미쓰비시 덴키 빌딩 솔루션즈 가부시키가이샤 엘리베이터 제어 장치, 엘리베이터 감시 시스템 및 엘리베이터 감시 방법
CN112623918B (zh) * 2020-12-09 2023-06-02 中铁第四勘察设计院集团有限公司 一种基于ipfs的自动扶梯智能决策方法及系统
US11912532B2 (en) * 2021-01-04 2024-02-27 Beltways Inc. System and methods for variable speed modular moving walkways
CN112960494B (zh) * 2021-02-08 2023-02-10 深圳市旺龙智能科技有限公司 用于加装在电梯上的乘梯控制装置及共享电梯云收费系统

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US8770350B2 (en) 2008-12-18 2014-07-08 Otis Elevator Company Access control system and access control method for a people conveyor control system
JP2014172714A (ja) 2013-03-08 2014-09-22 Hitachi Ltd エレベータシステム
CN104495553A (zh) 2014-12-05 2015-04-08 安徽中程智能科技有限公司 智能电梯监测管理平台
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Publication number Priority date Publication date Assignee Title
US20060260880A1 (en) 2004-05-21 2006-11-23 Mitsubishi Denki Kabushiki Kaisha Remote supervisory control system for elevating machine
US8770350B2 (en) 2008-12-18 2014-07-08 Otis Elevator Company Access control system and access control method for a people conveyor control system
JP2014172714A (ja) 2013-03-08 2014-09-22 Hitachi Ltd エレベータシステム
US9596078B2 (en) 2013-09-10 2017-03-14 M2M And Iot Technologies, Llc Set of servers for “machine-to-machine” communications using public key infrastructure
CN104495553A (zh) 2014-12-05 2015-04-08 安徽中程智能科技有限公司 智能电梯监测管理平台
CN104986634A (zh) 2015-07-08 2015-10-21 广州广日电梯工业有限公司 一种电梯云群控系统及方法

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