EP4063310A1 - Procédé de commande d'une installation de transport des personnes - Google Patents

Procédé de commande d'une installation de transport des personnes Download PDF

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Publication number
EP4063310A1
EP4063310A1 EP21164512.2A EP21164512A EP4063310A1 EP 4063310 A1 EP4063310 A1 EP 4063310A1 EP 21164512 A EP21164512 A EP 21164512A EP 4063310 A1 EP4063310 A1 EP 4063310A1
Authority
EP
European Patent Office
Prior art keywords
transport system
passenger transport
measured values
safety
drive motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21164512.2A
Other languages
German (de)
English (en)
Inventor
Gerhard Stoiber
Yixin Wu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inventio AG
Original Assignee
Inventio AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inventio AG filed Critical Inventio AG
Priority to EP21164512.2A priority Critical patent/EP4063310A1/fr
Priority to CN202220536042.7U priority patent/CN218950772U/zh
Publication of EP4063310A1 publication Critical patent/EP4063310A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • B66B1/3492—Position or motion detectors or driving means for the detector

Definitions

  • the present invention relates to a method for controlling a passenger transport system. Furthermore, the invention relates to a control device, a computer program and a computer-readable medium for executing such a method and a passenger transport system that is equipped with such a control device.
  • a drive motor of an escalator or a moving walkway can be controlled by means of a frequency converter, for example.
  • Sensor signals from an inductive sensor interacting with a flywheel or other safety-relevant or non-safety-relevant sensors or frequency values provided by the frequency converter can be evaluated in a control device.
  • the evaluation in the control device can require relatively high clock rates.
  • Such a control device is therefore usually implemented as an embedded system.
  • simple functions can also be taken over by a programmable logic controller (PLC) for short.
  • PLC programmable logic controller
  • EP 1 323 661 B1 describes, for example, a method for braking a drive motor of a passenger conveyor using a frequency converter and a two-channel safety circuit.
  • a first aspect of the invention relates to a method for controlling a passenger transport system.
  • the passenger transport system includes a drive motor, a rotary encoder mechanically coupled to a drive shaft of the drive motor, and a control device.
  • the method comprises at least the following steps: receiving in the control device measured values provided by the rotary encoder for a rotary speed and/or a rotary angle of the drive shaft; evaluating the measured values, an evaluation result being generated; Generating a control signal for controlling the drive motor and/or a braking device of the passenger transport system based on the evaluation result.
  • the method can be executed automatically by a processor of the control device, for example.
  • the control device can include hardware and/or software modules.
  • the passenger transport system can be designed, for example, as an escalator or moving walk.
  • an embodiment of the passenger transport system as an elevator is also possible.
  • the drive motor can be designed, for example, as a synchronous or asynchronous motor. If the passenger transport system is designed as an escalator or moving walkway, the drive motor can be coupled to a step belt, a pallet belt and/or a handrail via a gear.
  • the drive motor can be controlled via a frequency converter.
  • the drive shaft of the drive motor can be a main drive shaft of the passenger transport system.
  • a rotating part of the rotary encoder can be connected in a suitable manner to the drive shaft in a rotationally fixed manner.
  • the rotating part can sit directly on the drive shaft or be coupled to it via a flange.
  • the rotary encoder also known as an encoder, can be designed as an incremental encoder or an absolute encoder.
  • the control signal can be, for example, a switching signal for one or more contactors or for one or more electric valves. However, the control signal can also be an input signal for controlling the speed of the drive motor.
  • the measured values that are received in the control device can be associated with a sign, for example.
  • a direction of rotation of the drive shaft can also be determined by evaluating the sign.
  • the computing effort involved in controlling the passenger transport system can be reduced compared to a solution in which these measured variables are only determined by converting a sensor signal, for example a Hall sensor, within the control of the Passenger transport system must be determined to be significantly reduced.
  • a sensor signal for example a Hall sensor
  • Another advantage is that complex safety functions such as monitoring the speed of the drive motor or checking the handrail and/or the people conveyor belt for overspeed and/or underspeed using the method described here and below also remain active when the frequency converter is faulty must be bridged, which can also be referred to as bypass operation.
  • a second aspect of the invention relates to a control device with a processor which is configured to carry out the method according to an embodiment of the first aspect of the invention.
  • the control device can include a memory and data communication interfaces for data communication with peripheral devices.
  • Features of the method according to an embodiment of the first aspect of the invention can also be features of the control device and vice versa.
  • a third aspect of the invention relates to a passenger transport system that includes a drive motor, a rotary encoder that is mechanically coupled to a drive shaft of the drive motor, and a control device according to an embodiment of the second aspect of the invention.
  • a fourth aspect of the invention relates to a computer program.
  • the computer program comprises instructions which, when the computer program is executed by the processor, cause a processor to execute the method according to an embodiment of the first aspect of the invention.
  • a fifth aspect of the invention relates to a computer-readable medium on which the computer program is stored according to an embodiment of the fourth aspect of the invention.
  • the computer-readable medium can be volatile or non-volatile data storage.
  • the computer-readable medium can be a hard drive, USB storage device, RAM, ROM, EPROM, or flash memory.
  • the computer-readable medium can also be a data communication network such as the Internet or a data cloud (cloud) enabling a download of a program code.
  • the control device is a programmable logic controller.
  • the measured values can be received in the programmable logic controller and evaluated there.
  • the control signal can be generated by the programmable logic controller.
  • the programmable logic controller can be regarded as a particularly advantageous design of the control device.
  • a programmable logic controller can be understood as a computer or a computer system for executing a computer program written in a special flowchart-based programming language, for example in contrast to a wired controller or an embedded system.
  • the programmable logic controller can be designed, for example, as a microcontroller with its own CPU and special operating system. However, other designs of the programmable logic controller are also possible. Such a controller offers the advantage of high flexibility and reliability, rapid error analysis and correction, and simple integration into an existing data communication network.
  • the measured values are entered into an evaluation module for determining a safety-related fault in the passenger transport system.
  • the evaluation result is generated based on outputs from the evaluation module.
  • An evaluation module can be understood as meaning a safety function for switching a safety circuit of the passenger transport system or a component of such a safety function.
  • a safety-relevant fault can be understood to mean a fault which, among other things, endangers damage-free operation of the passenger transport system and/or undamaged transport of passengers.
  • the evaluation module can be designed in such a way that high security requirements such as B. a safety integrity level (Safety Integrity Level 3 - SIL3) is sufficient. Safe operation or safe decommissioning of the passenger transport system can thus be guaranteed.
  • the measured values in at least one other evaluation module to determine another safety-related fault Entered passenger transport system is also generated based on outputs from the further evaluation module.
  • a further evaluation module can be understood as meaning a further safety function for switching a safety circuit of the passenger transport system or a component of such a further safety function. In this way, different types of safety-related faults in the passenger transport system can be detected.
  • the evaluation module is executed by a programmable logic controller. Additionally or alternatively, the further evaluation module or the further evaluation modules can also be executed by the programmable logic controller. In this way, complex safety functions can be implemented with relatively little computing effort. In addition, the relevant evaluation modules can be flexibly adapted to different types of passenger transport systems by means of the programmable logic controller.
  • At least one non-safety-relevant evaluation module for evaluating the measured values and/or additional measured values can be executed by the programmable logic controller.
  • the evaluation result can additionally be generated based on outputs from the non-safety-related evaluation module or the non-safety-related evaluation modules.
  • the evaluation modules can, for example, be executed cyclically by the programmable logic controller.
  • the evaluation modules can be called up one after the other in each cycle.
  • Each cycle can be executed with a priority that depends on whether safety-related or non-safety-related evaluation modules are called in the cycle.
  • a cycle can thus be executed with a higher priority, for example with the highest priority, if only safety-relevant evaluation modules are called in it, or with a lower priority if at least one non-safety-relevant evaluation module is called in it.
  • the cycle with the lowest priority if only non-safety-related evaluation modules are called.
  • each non-safety-related evaluation module can be executed with a lower priority than each safety-related evaluation module.
  • Standard-compliant operation can be understood to mean that the passenger transport system during its operation meets the standards or regulations that must be observed at its place of operation, for example regulations of the European standards EN81 for elevators and EN115-1 for escalators or moving walks.
  • all safety-related functionalities and, optionally, at least one non-safety-related functionality of the passenger transport system are controlled based on control signals that are generated by the control device.
  • the control device generates the control signals by means of at least one programmable logic controller. This means that additional resources, for example in the form of hardware and/or software components of an embedded system, can be dispensed with.
  • additional measured values which were provided by at least one additional sensor of the passenger transport system, are received and evaluated in the control device.
  • the evaluation result can be generated based on the measured values and the additional measured values.
  • the additional sensor can be, for example, a handrail sensor that interacts with a handrail and/or a people-conveyor belt sensor that interacts with a people-conveyor belt, for example a step or pallet belt.
  • the reliability of the method can be increased by evaluating at least two different measured variables, for example those recorded at different points in the passenger transport system.
  • the additional measured values indicate a speed of a handrail and/or a people conveyor belt of the people transportation system.
  • the additional measurement values can be speed values generated by measuring the speed of the handrail and/or the people conveyor belt.
  • Complex safety functions for protecting the passenger transport system can be implemented on the basis of such input variables.
  • the additional measured values and/or the measured values together with the additional measured values are evaluated in order to determine whether the handrail and the people conveyor belt are running synchronously.
  • the speed of the handrail and the speed of the people conveyor belt can be compared with one another and/or with the rotational speed of the drive motor. This means that there is no need to define a nominal speed for the handrail. This helps to avoid errors when defining the rated speed for the handrail.
  • the result of the evaluation can show, for example, whether the handrail and the people conveyor belt are running synchronously or not. Additionally or alternatively, the evaluation result can indicate a difference between at least two of the following three speeds, namely the speed of the handrail, the speed of the people conveyor belt and the rotational speed of the drive motor.
  • control signal can be generated to stop the people conveyor system or put it out of operation.
  • other monitoring functions based on the measured values and/or the additional measured values are also possible.
  • the additional measured values are also entered into the evaluation module. Additionally or alternatively, the additional measured values can also be entered into the further evaluation module or the further evaluation modules. The reliability of the method when recognizing different types of safety-related faults in the passenger transport system can thus be increased.
  • the evaluation result indicates whether or not there is a safety-related fault in the passenger transport system.
  • the control signal is generated in order to control the drive motor and/or the braking device in such a way that the passenger transport system is stopped if the evaluation result indicates that there is a safety-related fault in the passenger transport system.
  • the passenger transport system can also be disconnected from a power grid by means of the control signal. This minimizes the risk of people being endangered if there is a safety-related disruption in the passenger transport system.
  • a safety-related fault can be detected, for example, based on a speed of the drive motor lying outside a range defined as safe and/or based on a speed of the handrail and/or the people conveyor belt lying outside a range defined as safe.
  • a safety-related fault can also be detected, for example, when the speed of the handrail is significantly lower or significantly higher than the speed of the people conveyor belt.
  • control signal is not generated if the evaluation result indicates that there is no safety-related fault in the passenger transport system.
  • the evaluation result can be generated cyclically.
  • the evaluation result of each cycle can be stored in a memory of the control device, for example in a memory of the programmable logic controller.
  • the stored evaluation results can then be read out, for example, for diagnostic purposes, for example via an Ethernet interface or via an Internet connection.
  • FIG. 1 shows a passenger transport system according to an embodiment of the invention.
  • FIG. 2 shows a control device according to an embodiment of the invention.
  • FIG. 1 shows a passenger transport system 100, here by way of example in the form of an escalator with a step belt 102 and a handrail 104.
  • the step belt 102 and the handrail 104 are mechanically coupled to a drive motor 106, for example an asynchronous motor that can be controlled via a frequency converter.
  • a drive shaft 108 of the drive motor 106 is also mechanically coupled to a rotary encoder 110 for detecting a rotational speed and/or a rotational angle of the drive motor 106 .
  • the rotary encoder 110 can be an incremental encoder or an absolute encoder.
  • a rotating part of the rotary encoder 110 can be connected to the drive shaft 108 in a rotationally fixed manner. For example, the rotating part can sit directly on the drive shaft 108 or be screwed to it via a corresponding flange.
  • a reduction gear (not shown) can also be present between the drive motor 106 and the step band 102 in order to reduce the rotational speed of the drive motor 106 and to increase the torque acting on the step band 102 .
  • the rotary encoder 110 can also be arranged on a shaft of this reduction gear, in which case the reduction ratio must of course be taken into account in the evaluation.
  • the rotary encoder 110 is configured to convert a rotational movement of the drive shaft 108 into measured values 112 for the rotational speed and/or the rotational angle.
  • the measured values 112 go into a control device 114 of the passenger transport system 100, where they are evaluated.
  • the control device 114 generates a control signal 116 for controlling the drive motor 106, for example for changing its speed and/or its torque.
  • the control signal 116 can also be generated in order to control a braking device 118 for braking the passenger transport system 100 and/or to disconnect the passenger transport system 100 from a power supply.
  • the braking device 118 can be an electric or hydraulic brake, for example.
  • control device 114 includes a programmable logic controller 200, hereinafter referred to as controller 200 for short, with a memory 202 and a processor 204.
  • controller 200 programmable logic controller
  • control software 206 is stored in the memory 202.
  • the processor 204 By executing the control software 206 by the processor 204, a method for controlling the people transportation system 100 described below is executed.
  • the measured values 112 are received in the controller 200 .
  • the controller 200 evaluates the measured values 112 and generates a corresponding evaluation result 208.
  • the evaluation result 208 can be input into a control signal generation module 210 of the controller 200, which generates the control signal 116 as a function of the evaluation result 208.
  • control signal generation module 210 can generate the control signal 116 if the evaluation result 208 indicates that there is a safety-related fault in the passenger transport system 100 .
  • the control signal 116 can cause, for example, the drive motor 106 to be stopped and/or the braking device 118 to be activated and/or the passenger transport system 100 to be disconnected from the power grid. In this way, the passenger transport system 100 can be put out of operation in a controlled manner in the event of a safety-related fault.
  • control signal generation module 210 can also suppress the generation of the control signal 116, for example.
  • evaluation result 208 It is possible for the evaluation result 208 to be buffered in the memory 202 .
  • the evaluation results 208 stored therein can then be read out for diagnostic purposes, for example.
  • the control software 206 can include an evaluation module 211a for determining a safety-related fault in the passenger transport system 100 .
  • the control software 206 can include a number of further evaluation modules 211b for determining further safety-related faults in the passenger transport system 100 . Different types of safety-related faults in the passenger transport system 100 can thus be detected.
  • the measured values 112 can be entered into the evaluation module 211a and additionally into at least one of the further evaluation modules 211b and evaluated there, with corresponding outputs 212 being generated by the respective evaluation modules 211a and 211b.
  • the evaluation modules 211a, 211b can be executed by the controller 200 on the basis of interrupts, similar to an embedded system.
  • the different parts of a program code that encodes the control software 206, for example in a single-task microcontroller, can be executed by interrupts depending on the priority.
  • the program code that encodes the safety-relevant evaluation modules 211a, 211b expediently has the highest priority.
  • the evaluation result 208 can be generated from the outputs 212 in an output processing module 214 .
  • the passenger transport system 100 can include at least one additional sensor 216 that provides additional measured values 218 .
  • the additional sensor 216 can be embodied, for example, as a handrail sensor for detecting a handrail speed at which the handrail 104 is moving and/or as a step belt sensor for detecting a step belt speed at which the step belt 102 is moving.
  • a handrail sensor for detecting a handrail speed at which the handrail 104 is moving
  • a step belt sensor for detecting a step belt speed at which the step belt 102 is moving.
  • others are also possible safety-relevant and/or non-safety-relevant versions of the additional sensor 216 or of the additional sensors 216.
  • the additional measured values 218 can be evaluated by the evaluation module 211a and, optionally, by at least one of the further evaluation modules 211b, analogously to the method described above with reference to the measured values 112.
  • the measured values 112 and the additional measured values 218 in the evaluation module 211a and/or in at least one of the further evaluation modules 211b can be compared with one another in order to determine whether the handrail 104 and the people conveyor belt 102 are running synchronously.
  • control software 206 can include at least one non-safety-relevant evaluation module for evaluating the measured values 112 and/or the additional measured values 218.
  • evaluation result 208 can also be generated based on outputs from the non-safety-related evaluation module.
  • the non-safety-related evaluation module can differ from the evaluation module 211a and the other evaluation modules 211b in that it is not absolutely necessary to ensure safe operation of the passenger transport system 100, in particular in the event of a safety-related fault in the passenger transport system 100.

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  • Control Of Conveyors (AREA)
  • Escalators And Moving Walkways (AREA)
EP21164512.2A 2021-03-24 2021-03-24 Procédé de commande d'une installation de transport des personnes Withdrawn EP4063310A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21164512.2A EP4063310A1 (fr) 2021-03-24 2021-03-24 Procédé de commande d'une installation de transport des personnes
CN202220536042.7U CN218950772U (zh) 2021-03-24 2022-03-10 人员运送设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21164512.2A EP4063310A1 (fr) 2021-03-24 2021-03-24 Procédé de commande d'une installation de transport des personnes

Publications (1)

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EP4063310A1 true EP4063310A1 (fr) 2022-09-28

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EP21164512.2A Withdrawn EP4063310A1 (fr) 2021-03-24 2021-03-24 Procédé de commande d'une installation de transport des personnes

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EP (1) EP4063310A1 (fr)
CN (1) CN218950772U (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990055386A (ko) * 1997-12-27 1999-07-15 이종수 엘리베이터의 위치 검출 장치 및 방법
EP1323661A1 (fr) 2001-12-24 2003-07-02 Inventio Ag Procédé pour stopper un dispositif de transport pour personnes
JP2009083941A (ja) * 2007-09-27 2009-04-23 Mitsubishi Electric Building Techno Service Co Ltd 乗客コンベアの手摺駆動用伝達条体の弛み量測定装置
JP2015227242A (ja) * 2014-06-02 2015-12-17 株式会社日立ビルシステム 移動手摺の駆動チェーンの摩耗量計測装置
CN212588221U (zh) * 2020-08-20 2021-02-23 杭州新马电梯有限公司 一种编码器前置超薄永磁同步主机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990055386A (ko) * 1997-12-27 1999-07-15 이종수 엘리베이터의 위치 검출 장치 및 방법
EP1323661A1 (fr) 2001-12-24 2003-07-02 Inventio Ag Procédé pour stopper un dispositif de transport pour personnes
JP2009083941A (ja) * 2007-09-27 2009-04-23 Mitsubishi Electric Building Techno Service Co Ltd 乗客コンベアの手摺駆動用伝達条体の弛み量測定装置
JP2015227242A (ja) * 2014-06-02 2015-12-17 株式会社日立ビルシステム 移動手摺の駆動チェーンの摩耗量計測装置
CN212588221U (zh) * 2020-08-20 2021-02-23 杭州新马电梯有限公司 一种编码器前置超薄永磁同步主机

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