US20210373880A1 - People conveyor system and a method for updating software of a people conveyor component in a people conveyor system - Google Patents

People conveyor system and a method for updating software of a people conveyor component in a people conveyor system Download PDF

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Publication number
US20210373880A1
US20210373880A1 US17/241,543 US202117241543A US2021373880A1 US 20210373880 A1 US20210373880 A1 US 20210373880A1 US 202117241543 A US202117241543 A US 202117241543A US 2021373880 A1 US2021373880 A1 US 2021373880A1
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Prior art keywords
conveyor
software
updating means
update
elevator
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Abandoned
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US17/241,543
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English (en)
Inventor
Tuukka Kauppinen
Risto Jokinen
Mikko Paakkinen
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Kone Corp
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Kone Corp
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Assigned to KONE CORPORATION reassignment KONE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Paakkinen, Mikko, JOKINEN, RISTO, KAUPPINEN, TUUKKA
Publication of US20210373880A1 publication Critical patent/US20210373880A1/en
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/60—Software deployment
    • G06F8/65—Updates
    • G06F8/656—Updates while running
    • 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
    • B66B1/3407—Setting or modification of parameters of the control system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B21/00—Kinds or types of escalators or moving walkways
    • B66B21/02—Escalators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B21/00—Kinds or types of escalators or moving walkways
    • B66B21/10—Moving walkways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B25/00—Control of escalators or moving walkways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B25/00—Control of escalators or moving walkways
    • B66B25/003—Methods or algorithms therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/602—Providing cryptographic facilities or services
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/40—Transformation of program code
    • G06F8/41—Compilation
    • G06F8/43—Checking; Contextual analysis
    • G06F8/433—Dependency analysis; Data or control flow analysis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/60—Software deployment
    • G06F8/61—Installation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/60—Software deployment
    • G06F8/65—Updates
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F8/00—Arrangements for software engineering
    • G06F8/70—Software maintenance or management
    • G06F8/71—Version control; Configuration management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B19/00—Mining-hoist operation
    • B66B19/007—Mining-hoist operation method for modernisation of elevators

Definitions

  • the invention relates to a people conveyor system and a method for updating software of a people conveyor component in a people conveyor system, such as an elevator system, an escalator system and/or a moving walkway system.
  • People conveyor system such as elevators
  • components each provided with a processor and a memory.
  • processor runs an elevator component-specific application software.
  • new features and/or corrections of existing features are provided in the form of new software versions.
  • safety regulations may change during lifetime of the component. For these reasons, it is necessary to update the application software of one or more conveyor components to be able to take advantage of the new features or corrected operation of the software.
  • An object of the invention is to present a people conveyor arrangement and a method for updating software of a people conveyor component in a people conveyor system, such as an elevator, an escalator and/or a moving walkway.
  • the software update can be carried out automatically and reliably without disturbing operation of the conveyor system and its users.
  • the software updates of the components can be carried out also in changing and challenging conditions, for example with reduced data transfer speeds or when there are communication connection interruptions.
  • the invention relates to a method for software update of a people conveyor component in a people conveyor system, such as an elevator system, escalator system and/or moving walkway system.
  • the conveyor system comprises a plurality of conveyor components, each said conveyor component comprising a memory and a processor running an application software, an updating means for updating conveyor component software, the updating means being communicatively connected to the conveyor components, wherein the updating means comprises or is connected to a processor and a memory, and at least one communication channel, arranged between the updating means and a remote update system.
  • the updating means downloads a software update from the remote update system via the at least one communication channel based on request from the remote update system and/or based on the request from at least one conveyor component and/or the people conveyor system, wherein the software download from the remote update system to the updating means and/or from the updating means to the conveyor component is performed as a background download and/or without affecting the operation of the people conveyor.
  • the updating means schedules installation of a software update to a certain predefined time and/or with certain predefined criteria, and/or wherein the updating means schedules installation of a software update of a conveyor component upon verification of the integrity of the downloaded update software.
  • a further verification of the integrity of the update software may be carried out to verify that the software was installed correctly and that correct version of the software was used for the installation.
  • the verification can be implemented in the following way: after the software update has been installed to the conveyor component, the updating means reads or receives the installed software from the conveyor component and further sends it back to the remote update system. The remote update system then verifies that the installed software is in line with the original software update.
  • the updating means schedules installation of software updates of the conveyor components to be carried out in a predefined order of the conveyor components, and/or wherein the predefined order is established based on functional dependencies between the conveyor components.
  • the updating means sends a software status enquiry to the conveyor components responsive to the request from the remote update system, generates a software status list of the conveyor components based on their responses to the enquiry and sends the software status list to the remote update system for generating the collective update software.
  • the software update is a collective update software comprising application software of at least part of the conveyor components connected to the updating means, e.g. the collective update software being conveyor-specific or conveyor system specific such as elevator-specific or elevator group-specific.
  • the updating means checks integrity of the collective software update, schedules update of selected conveyor components and then sends application software from its memory to each said conveyor components e.g. in a predetermined order.
  • the application software is conveyor component-specific application software and comprising an installation key, such as an encryption key, associated with a conveyor component, wherein specific counterpart of the said application software can be installed only in the conveyor component associated with the respective installation key.
  • an installation key such as an encryption key
  • PESSRAL programmable safety
  • SIL3 safety integrity level 3
  • the remote update system sends the update software data on segments or blocks, for example in the form of a chained list, each segment or block provided with an identification, and wherein the updating means reassembles the downloaded update software from the segments of blocks, on the basis of the respective identifications.
  • the updating means requests the remote update system to resend one or more identified data segments or blocks in case of failure of verification of the integrity.
  • the at least one communication channel comprises at least two separate parallel physical media between the updating means and the remote update system, and/or wherein the physical media may comprise a data cable and/or a wireless network, such as a cellular network.
  • the invention relates to a people conveyor system, such as an elevator system, escalator system and/or moving walkway system, comprising a plurality of conveyor components, each said conveyor component comprising a memory and a processor running an application software, an updating means for updating conveyor component software, the updating means being communicatively connected to the conveyor components, wherein the updating means comprises or is connected to a processor and a memory, and at least one communication channel, arranged between the updating means and a remote update system.
  • a people conveyor system such as an elevator system, escalator system and/or moving walkway system, comprising a plurality of conveyor components, each said conveyor component comprising a memory and a processor running an application software, an updating means for updating conveyor component software, the updating means being communicatively connected to the conveyor components, wherein the updating means comprises or is connected to a processor and a memory, and at least one communication channel, arranged between the updating means and a remote update system.
  • the updating means is configured to download a software update from the remote update system via the at least one communication channel based on request from the remote update system and/or based on the request from at least one conveyor component and/or the people conveyor system
  • the conveyor system is configured to perform the software download from the remote update system to the updating means and/or from the updating means to the conveyor component as a background download and/or without affecting the operation of the people conveyor.
  • the invention relates a computer program comprising instructions which, when executed by a computer, cause the computer to carry out the method according to the solution of the invention.
  • the invention relates to a computer-readable medium comprising the computer program according to the solution of the invention.
  • a number of refers herein to any positive integer starting from one, e.g. to one, two, or three.
  • a plurality of refers herein to any positive integer starting from two, e.g. to two, three, or four.
  • FIG. 1 illustrates an elevator according to one embodiment of the invention
  • FIG. 2 illustrates an escalator according to one embodiment of the invention
  • FIG. 3 presents a flow chart illustrating a method according to one embodiment of the invention.
  • the solution of the invention is related to a conveyor system which comprises at least one conveyor component, each of which conveyor component comprises a memory and a processor running an application software.
  • the solution of the invention provides a way for updating the application software of the conveyor components.
  • FIG. 1 schematically illustrates an embodiment according to the present invention in which the people conveyor is an elevator in which the solution of the invention can be used.
  • the elevator comprises an elevator shaft 101 in which an elevator car 102 moves to serve different floors.
  • the elevator car 102 can stop in a first floor 103 , second floor 104 , third floor 105 and fourth floor 106 .
  • the floors may be any floor in a building and not necessarily the first and second floor of the building.
  • the first floor 103 may be, for example, garage and the second floor 104 the ground level.
  • a landing door 107 can be arranged in each floor in front of the elevator car 102 .
  • FIG. 1 schematically illustrates an embodiment according to the present invention in which the people conveyor is an elevator in which the solution of the invention can be used.
  • the elevator comprises an elevator shaft 101 in which an elevator car 102 moves to serve different floors.
  • the elevator car 102 can stop in a first floor 103 , second floor 104 , third floor 105 and fourth floor 106 .
  • the elevator comprises a motor 108 configured to move the elevator car via the hoisting rope, wherein the motor 108 is controlled by an elevator control unit 110 .
  • the updating means 111 for updating conveyor component software may be arranged in connection to the conveyor control unit and/or integrated to conveyor control unit, such as an elevator control unit 110 .
  • the updating means 111 is communicatively connected to the conveyor components, wherein the updating means 111 comprises or is connected to a processor and a memory.
  • FIG. 2 schematically illustrates an embodiment according to the present invention in which the conveyor is an escalator 200 in which the solution of the invention can be used.
  • the escalator may comprise a step-chain coupled to a motor 206 via a transmission 202 comprising at least a chain or belt or similar.
  • the motor 206 may generate a rotational force via the transmission causing the step-chain to move in an intended traveling direction.
  • a brake may be arranged to the conveyor system so that when de-energized it is configured to meet the rotating axis of the transmission and, in that manner, to brake movement of the step chain or keep the step chain standstill when the escalator system is idle.
  • the transmission may comprise, in the context of escalator system, a gearbox with the mentioned entities.
  • the escalator system may comprise an escalator control unit 210 which may e.g. be configured to control the movement of step-chain through a control of a power supply to the motor 202 and to the escalator brake.
  • the conveyor system can comprise a processing unit 204 .
  • a second motor 207 with a second transmission 203 may be provided, for example, at the opposite end of the step-chain.
  • a second processing unit 205 may be mounted to the in connection with the second motor.
  • the updating means 211 for updating conveyor component software may be arranged in connection to the escalator control unit 210 and/or integrated to escalator control unit 210 .
  • the updating means 211 is communicatively connected to the conveyor components, wherein the updating means 211 comprises or is connected to a processor and a memory.
  • the components and functions of a people conveyor device can be updated according to the solution of the invention.
  • the people conveyor can be for example the elevator system presented in FIG. 1 or an escalator system presented in FIG. 2 .
  • the solution uses at least one remote update system for sending the and/or establishing the updated software and/or updated software components.
  • the remote update system 112 can be e.g. a remote computing device, such as a server, or a cloud service. At least one communication channel is arranged between the people conveyor component and a remote update system 112 .
  • the updating means downloads a software update from the remote update system via the at least one communication channel based on request from the remote update system and/or based on the request from at least one conveyor component and/or the people conveyor system.
  • the remote update system can inform device, e.g. the updating means, about the new software updates.
  • the device or component or updating means can request information about the software updates from the remote update system and the device, component and/or updating means can request or select a specific update.
  • the software download from the remote system to the updating means and/or from the updating means to the conveyor component can be performed as a background download and/or without affecting the operation of the people conveyor. This way interruptions in data communication or slow transfer speeds do not cause interruption to the operation of the conveyor device.
  • the device starts to receive data, it stores it to its memory and continues to transfer data as long as the transfer of the update data is complete. If the transfer is interrupted, it can be continued when the required systems are operational and/or e.g. when operation of the communication channel can be resumed.
  • the update i.e. installation of the software update
  • the installation time or moment can be selected e.g.
  • the determination of the installation time can be based on certain time, e.g. night, or collected usage statistics, in which case the installation of the update can be done when the usage level is lowest during the day or week and/or usage level is under certain threshold level.
  • the installation of the software update is not carried out before a confirmation from a user of the update system or from the remote update system is received.
  • the system carries out the installation of the software after it has received a confirmation from a user locally from the conveyor system site.
  • a software or software update e.g. a collective software update
  • a software or software update is downloaded as a background download to memory of a separate update means, i.e. not directly to the conveyor component but to a separate memory device, e.g. located at conveyor site.
  • the updating means can check integrity of the software update and/or schedule update of selected conveyor components.
  • the application software can be sent from the memory of the updating means to each said conveyor components, e.g. according to a schedule, such that conveyor components will be updated in a predetermined order.
  • the downloading of software or update data from the remote update system to the updating means is done as a background download.
  • Transferring of the software or software update data from the updating means to the conveyor component can be done in one embodiment of the invention as a background download and in another embodiment of the invention not as a background download, i.e. so that the conveyor component under software download and installation can be inoperable.
  • At least a part of the conveyor components can be updated via the updating means. In one embodiment of the invention at least part of the conveyor components can receive the update data directly from the remote update system. In embodiment of the invention the updating can be done as a combination of the above described embodiments, e.g. so that a part of the conveyor components receive the software or software update via the updating means and a part of the conveyor components receive the software or software update directly from the remote update system.
  • the memory of the device and/or component is such that at least the whole program of the device can fit to the memory.
  • the memory can be any kind of memory, for example non-volatile memory such as flash memory.
  • the remote update system is configured to send the update software data on segments or blocks, for example in the form of a chained list.
  • Each segment or block is provided with an identification.
  • the updating means is configured to reassemble the downloaded update software from the segments or blocks, on the basis of the respective identifications.
  • the updating means is configured to schedule a software update of an elevator component upon verification of the integrity of the downloaded update software, such that all segments/blocks have been downloaded. This can mean that, upon communication interrupt or missing some segments or blocks, the updating means can resume the software download without need of reloading the entire software. This can also be used to verify that the software has been transferred and stored to the memory successfully, e.g. without any errors.
  • Updating means can control the software updates of different components and for example send component specific update data to components and/or instruct the components to start installation of the updated software.
  • transferring of the software or software update data from the updating means to the conveyor component can be done in one embodiment of the invention as a background download and in another embodiment of the invention not as a background transfer, i.e. so that the conveyor component under software download or installation can be inoperable.
  • the updating means requests the remote update system to resend one or more identified data segments or blocks in case of failure of verification of the integrity. This can mean that, upon communication interrupt or missing some segments or blocks, the updating means can resume the software download without need of reloading the entire software.
  • the remote link comprises at least two separate parallel physical media between the updating means and the remote update system. This can mean that software download may be speeded up by using at each time the remote link(s) with best transfer capacity.
  • the physical media may comprise a data cable and/or a wireless network, such as a cellular network.
  • the update software is a collective update software comprising application software of the elevator components.
  • the collective update software is elevator-specific or elevator group-specific, accepted by the updating means.
  • the updating means checks integrity of the collective software update, schedules update of selected conveyor components and then sends application software from its memory to each said conveyor components e.g. in a predetermined order.
  • the application software is elevator component-specific, comprising an installation key, such as an encryption key, associated with an elevator component-specific counterpart such that said application software may be installed successfully only in the elevator component associated with the respective installation key.
  • each elevator component comprises a secure chip comprising a component-specific encryption key.
  • the updating means is configured to send a software status enquiry to the elevator components responsive to the request from the remote update system.
  • the updating means is configured to generate a software status list of the elevator components based on their responses to the enquiry such that status or version of each application software associated with respective elevator components listed.
  • the updating means sends the software status list to the remote update system, and the remote update system checks which components require application software update and generates the collective update software accordingly.
  • the updating means is configured to schedule a software update of the elevator components in a predetermined order.
  • the predetermined order is established based on functional dependencies between the elevator components. For example, before updating specific elevator components it may be necessary to update some functionally co-acting components to ensure operational integrity or safety. For example, to update safety sensor software before updating safety controller reading the sensor. Wrong update sequence might also lead to communication interruption between elevator components. Therefore, the specified update order may also speed up the update process and shorten elevator downtime.
  • an inspection operation may be performed under a virtual presence of a service technician or an operator. This can mean that, for example, an operator located in remote service center receives a camera signal from elevator site via a remote link and ensures operational integrity by visually observing the camera signal.
  • the conveyor components can be communicatively connected to the updating means, e.g. via a serial data bus, such as CAN bus, LON bus or ethernet.
  • the updating means can be configured to download an update software from the remote update system by using a transfer protocol accepted between the updating means and the remote update system, for example TCP/IP.
  • the updating means may be a separate processing unit, or it may be a functionality added to some existing conveyor component, such as an elevator control unit and/or elevator group controller.
  • the conveyor system such as an elevator system, comprises conveyor components, e.g. elevator components, each comprising a memory and a processor running a component-specific application software.
  • the conveyor control component may be one of conveyor elevator control unit, e.g.
  • an elevator control unit for example the unit receiving landing calls, calculating movement profile for elevator car service
  • drive unit for example the unit providing power signals to hoisting motor to move elevator car according to the movement profile
  • safety controller for example the unit programmable safety device fulfilling EN 61508 safety integrity level 3
  • brake controller for example the unit supplying current/interrupting current supply of electromagnets of hoisting machinery brakes to release/engage the brakes
  • call giving unit for example the unit for inputting manual service requests by the passengers
  • car control panel, destination operation panel, door operator for example the unit for opening/closing elevator doors
  • elevator car position detection unit inspection drive unit (for example the unit for manual inspection drive), group control unit (for example the unit for allocating service requests to different elevators), overspeed governor unit (for example the unit for monitoring overspeed situation of elevator car), a sensor measuring an operational parameter of the elevator (for example safety contact, temperature sensor, camera), voice intercom device.
  • a software e.g. a collective software update data
  • the updating means will check the integrity of the data and/or schedule the downloads to two or more conveyor components such that they will be updated in a predetermined order. Then the updating means will download and install the application software from its memory to the conveyor components according to a predetermined order.
  • conveyor component under installation can be inoperable, in which case the data transfer from updating means to the conveyor components is not done as a background download.
  • the updating means is configured to operate in the same manner as described above, e.g. in the previous paragraph, but it has been integrated into a conveyor component. Then download to the updating means from the remote server takes place as a background download, so the conveyor system will be operational during download from the remote server to the updating means. After collective software has been downloaded to the integrated updating means, application software will then be installed from the updating means to conveyor components in a predetermined order, e.g. in the same way as described above.
  • FIG. 3 a method according to an example embodiment is disclosed.
  • the method is initiated by receiving a request for a software update from a remote update system and/or based on a request from at least one conveyor component and/or a people conveyor system.
  • the method proceeds to starting downloading the software update from the remote update system via the at least one communication channel based on request from the remote update system and/or based on the request from at least one conveyor component and/or the people conveyor system.
  • the software download from the remote update system to the updating means and/or from the updating means to the conveyor component is performed as a background download and/or without affecting the operation of the people conveyor
  • the transmissions between the units and/or components may be performed by using a wireless or wired transmitter.
  • the transmitter may be an independent transmitter using mobile communication networks, Wi-Fi or similar.
  • the transmission may be encrypted.
  • the transmission needs not to be a direct transmission but may involve any number of network elements in between. Thus, using an ordinary wireless internet connection is acceptable provided that the required units are able to receive the transmission.
  • a controller of a conveyor system in which the solution of the invention can be used may comprise at least one processor connected to at least one memory.
  • the at least one memory may comprise at least one computer program which, when executed by the processor or processors, causes the controller to perform the programmed functionality.
  • the at least one memory may be an internal memory of the at least one processor.
  • the controller may also comprise an input/output interface. Via the input/output interface, the control apparatus may be connected to the required devices or units.
  • the controller may be a control entity configured to implement only the above disclosed operating features, or it may be part of a larger elevator control entity, for example, a conveyor controller, such as an elevator controller, an escalator controller or a moving walkway controller.
  • the components or other parts of the exemplary embodiments can include computer readable medium or memories for holding instructions programmed according to the teachings of the present embodiments and for holding data structures, tables, records, and/or other data described herein.
  • Computer readable medium can include any suitable medium that participates in providing instructions to a processor for execution.
  • Computer-readable media can include, for example, a floppy disk, a flexible disk, hard disk, magnetic tape, any other suitable magnetic medium, a CD-ROM, CD ⁇ R, CD ⁇ RW, DVD, DVD-RAM, DVD1RW, DVD ⁇ R, HD DVD, HD DVD-R, HD DVD-RW, HD DVD-RAM, Blu-ray Disc, any other suitable optical medium, a RAM, a PROM, an EPROM, a FLASH-EPROM, any other suitable memory chip or cartridge or any other suitable medium from which a computer can read.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Bioethics (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
US17/241,543 2020-05-29 2021-04-27 People conveyor system and a method for updating software of a people conveyor component in a people conveyor system Abandoned US20210373880A1 (en)

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EP20177284.5A EP3915912A1 (de) 2020-05-29 2020-05-29 Personenbeförderungssystem und verfahren zur aktualisierung der software eine personenbeförderungskomponente in einem personenbeförderungssystem
EP20177284.5 2020-05-29

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US17/241,501 Active 2041-07-08 US11733995B2 (en) 2020-05-29 2021-04-27 People conveyor system and a method for updating software of a people conveyor component in a people conveyor system

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EP3915912A1 (de) 2021-12-01
US11733995B2 (en) 2023-08-22

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