EP0452130A2 - Commande du temps d'arrêt d'une porte - Google Patents

Commande du temps d'arrêt d'une porte Download PDF

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Publication number
EP0452130A2
EP0452130A2 EP91303215A EP91303215A EP0452130A2 EP 0452130 A2 EP0452130 A2 EP 0452130A2 EP 91303215 A EP91303215 A EP 91303215A EP 91303215 A EP91303215 A EP 91303215A EP 0452130 A2 EP0452130 A2 EP 0452130A2
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EP
European Patent Office
Prior art keywords
door
elevator car
time period
floor
predicted
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Withdrawn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
EP91303215A
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German (de)
English (en)
Other versions
EP0452130A3 (en
Inventor
Venkataramana Sarma Pullela
Zuhair S. Bahjat
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.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
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 Otis Elevator Co filed Critical Otis Elevator Co
Publication of EP0452130A2 publication Critical patent/EP0452130A2/fr
Publication of EP0452130A3 publication Critical patent/EP0452130A3/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02—Door or gate operation
    • B66B13/14—Control systems or devices
    • B66B13/143—Control systems or devices electrical

Definitions

  • the present invention is directed to controlling the operation of an elevator car door. More particularly, the present invention is directed to controlling door dwell time of an elevator car door.
  • door dwell time means the time between when the door of an elevator car is commanded to open and when the door is commanded to close.
  • each floor typically has a set of buttons located in the hallway at or near the elevators. These buttons, commonly referred to as hall call buttons, enable users to request elevator car service in a predetermined direction, i.e., up and/or down. Additionally, the interior of an elevator car is generally equipped with a plurality of buttons, commonly referred to as car call buttons, which enable users to request service to specific floors.
  • an elevator control system also referred to in the art as an elevator dispatching system, monitors the status of the hall call buttons at the floors and car call buttons in the elevator cars, assigning elevator cars to the floors in response to hall calls registered at the floors and/or car calls registered in the elevator car.
  • elevator control systems are commonly provided with an advanced door opening feature.
  • the elevator control system commands the elevator car door to begin opening when the elevator car commits to a floor, i.e., when it begins to decelerate in order to stop at the floor. In this way, the elevator car door is almost completely open by the time the elevator car stops at the floor.
  • the door remains open for a fixed period of time, based on whether the elevator car is responding to a car call or a hall call. Typically, it is assumed that only one passenger will deboard the elevator car in response to a car call and that only one passenger will board in response to a hall call. Additionally, it is assumed that it takes less time to deboard an elevator car than to board. Based on these assumptions, the fixed period of time is typically about 4 seconds for a car call and typically about 6 seconds for a hall call.
  • the elevator control system commands the elevator car door to begin closing.
  • Door reversal occurs where passenger transfer is not fully accomplished at the time the door begins closing.
  • Door reversal is commonly initiated either when a passenger breaks a beam located at the entrance of the elevator car, when the edge of the door contacts a passenger, or when the edge of the door is held by a passenger.
  • the fixed door dwell time is either too short, e.g., in relatively heavy traffic conditions, or is too long, e.g., where no passenger is waiting to board the elevator car.
  • a method of controlling the operation of an elevator car door comprising the steps of:
  • a door dwell sensor is preferably mounted on a door frame of an elevator car. The sensor emits radiation and senses reflected radiation in the presence of a potential passenger.
  • the sensor preferably determines in what direction the passenger is moving based on the time between reflected radiation signals. For example, where the time between reflected signals is decreasing, it is indicative of a passenger moving towards the elevator car. Where the time between reflected signals is increasing, it is indicative of a passenger moving away from the elevator car.
  • the door As an elevator car arrives at a floor, its door is opened to allow passengers to board and deboard.
  • the door is preferably initially held open a first predetermined time period to allow passengers to exit and to allow passengers who wish to board a chance to move towards the elevator car.
  • the present invention detects for boarding traffic, based on passenger movement toward the elevator car. If no boarding traffic is detected, the door of the elevator car begins to close.
  • the door is further held open a second predetermined time period. If the total amount of time that the elevator car door has been open is less than a predetermined maximum amount of time, the present invention again detects for the presence of boarding traffic. If boarding traffic is detected, the door is again held open a second predetermined time period. This process continues until either boarding traffic is not detected, or the door has remained open for at least the predetermined maximum amount of time. When boarding traffic is not detected, or when the door has remained open for at least the predetermined maximum amount of time, the elevator car door will begin to close.
  • the predetermined maximum amount of time can be a fixed value or variable, based on the reason the elevator car stopped at the floor.
  • the predetermined maximum amount of time can be based on a predicted door dwell time, which takes into account the number of passengers that are predicted to be boarding and deboarding the elevator car at the floor, as well as the status of the particular elevator car.
  • the present invention therefore, preferably uses information received from the door dwell sensor to control the door dwell time of the elevator car door based on traffic conditions. For example, when no boarding traffic is detected, the door is held open a minimum door dwell time. As boarding traffic volume increases, the door dwell time is also increased. Thus, the efficiency of the elevator control system is improved.
  • Figure 1 depicts an exemplary elevator control system.
  • Figure 2 illustrates a preferred embodiment of the sensor to sense the presence of passenger traffic flow through the elevator car door.
  • Figure 3 illustrates a preferred embodiment of a process for controlling the door dwell time of an elevator car door based on traffic conditions.
  • Elevator control systems are well known in the art.
  • US 4,363,381 to Bittar discloses an elevator control system employing a group controller connecting individual car controllers.
  • EP 0,239,662 discloses an elevator control system employing individual car controllers communicating via a bi-directional ring communication system. Reference is made to these publications for specific details.
  • each elevator car has operational control subsystem (OCSS) 101 which communicates to every other OCSS in a ring communication system via lines 102, 103.
  • OCSS operational control subsystem
  • each OCSS has various circuitry connected thereto. However, for the sake of simplicity, the circuitry associated with only one OCSS will be described.
  • Hall call buttons and their associated lights and circuitry are connected to an OCSS via remote station 104, remote serial communication link 105 and switch-over module 106.
  • Car buttons and their associated lights and circuitry are connected to an OCSS via remote station 107 and remote serial communication link 108.
  • Hall lanterns indicating e.g. the direction of travel of the car which is to stop and/or which set of doors will be opened to accommodate the elevator car which is to stop, and their associated lights and circuitry (not shown) are connected to an OCSS via remote station 109 and remote serial communication link 110.
  • the operation of the elevator car door is controlled by door control subsystem (DCSS) 111.
  • DCSS door control subsystem
  • a sensor (not shown) can be mounted on the elevator car door frame to sense passenger traffic flow through the elevator, thereby controlling door dwell time via the DCSS based on the presence of passenger traffic flow.
  • MCSS motion control subsystem
  • DBSS drive and brake subsystem
  • Dispatching is determined and executed by the OCSS under the supervisory control of advanced dispatching subsystem (ADSS) 113, which can be housed, e.g., in computer 115, communicating via information control subsystem (ICSS) 114.
  • ADSS advanced dispatching subsystem
  • ICSS information control subsystem
  • the DCSS also determines the load of the elevator car, the load being converted into user boarding and/or deboarding counts by the MCSS. This information can be sent to the ADSS for recordation and prediction of traffic flow in order to increase the efficiency of elevator service.
  • user boarding and/or deboarding counts can be determined by a people sensing/counting arrangement as shown, e.g., in US 4,799,243.
  • Door dwell sensor 200 is preferably mounted on door frame 202 of elevator car 204, thus requiring only one sensor per elevator car. Alternatively, however, a sensor can be provided at each floor for each elevator.
  • the sensor can be based on infrared or other radiation technology, e.g., ultrasound, which emits radiation and senses reflected radiation in the presence of potential passenger 206.
  • the sensor preferably emits radiation outwardly towards the area where a potential passenger would wait for an elevator car after registering a hall call.
  • the sensor preferably determines in what direction the passenger is moving based on the time between reflected radiation signals. For example, where the time between reflected signals is decreasing, it is indicative of a passenger moving towards the elevator car. Where the time between reflected signals is increasing, it is indicative of a passenger moving away from the elevator car.
  • the elevator control system preferably receives information regarding passenger traffic flow on a periodic basis, e.g., every 100 milliseconds.
  • a signal is sent to the OCSS for controlling the operation of doors 208 of the elevator car via the DCSS.
  • FIG 3 a preferred embodiment for controlling the door dwell time of an elevator car door based on traffic conditions is illustrated.
  • the present invention uses information received from the door dwell sensor ( Figure 2) to control the door dwell time of the elevator car door based on traffic conditions. For example, when no boarding traffic is detected, the door is held open a minimum door dwell time. As boarding traffic volume increases, the door dwell time is also increased. Thus, the efficiency of the elevator control system is improved.
  • the elevator control system commands the door of the elevator car to open, either when an elevator car commits to a floor, i.e., when it begins to decelerate in order to stop at the floor, or when the elevator car has stopped at the floor.
  • the elevator car door is initially held open for a time period of ⁇ t1 to allow passengers to exit and to allow passengers who wish to board a chance to move toward the elevator car.
  • the value of ⁇ t1 is preferably a fixed value, e.g., 1 second.
  • the value of ⁇ t1 can be variable, based on the reason the elevator car stopped at the floor. For example, if the elevator stopped in response to a car call, ⁇ t1 can be, e.g., 3 seconds. If the elevator stopped in response to a hall call, ⁇ t1 can be, e.g., 1 second. If the elevator stopped in response to a coincident call, defined herein as when the elevator car is responding to both a car call and a hall call at same floor, ⁇ t1 can be, e.g., 3 seconds.
  • the value representing the total time the elevator car door has been open, t Total is initialized.
  • the value of t Total is initialized to the value of ⁇ t1.
  • the system detects for the presence of boarding traffic. In the preferred embodiment, if the system detects passenger movement toward the elevator car, it will assume that those moving toward the elevator car do so with the intention of boarding.
  • the door is further held open for a time period of ⁇ t2 at step 306.
  • the value of ⁇ t2 is preferably a fixed value, e.g., 1 second.
  • the system at step 308 updates t Total , the total time the elevator car door has been open.
  • steps 304 through 310 are repeated.
  • the value of t Max represents the desired door dwell time, defined herein as the time between when the door of an elevator car is commanded to open and when the door is commanded to close.
  • the value of t Max can be a fixed value, e.g., 10 seconds.
  • the value of t Max can be variable, based on the reason the elevator car stopped at the floor. For example, if the elevator stopped in response to a car call, t Max can be, e.g., 4 seconds. If the elevator stopped in response to a hall call, t Max can be, e.g., 6 seconds. If the elevator stopped in response to a coincident call, t Max can be, e.g., 8 seconds.
  • the value of t Max can be determined based on a predicted door dwell time, which takes into account the number of passengers that are predicted to be boarding and deboarding the elevator car at the floor, as well as the status of the particular elevator car.
  • a predicted door dwell time can be determined based on the following empirically derived equation: x[ae -x/s + be -r/s + c] wherein: x represents the total number of predicted passengers transferring; r represents the spare capacity after passenger deboarding and before boarding (e.g., total capacity - current load + predicted to deboard); s represents about 1/4 the car capacity; and a, b, c represent constants which depend upon car size and transfer mode. Based on a typical transfer mode where entry of boarding passengers follows exit of deboarding passengers, a is 1.08, b is 2.36 and c is 0.62.
  • the predicted door dwell time is: 5[1.08e- 5/7 + 2.36e -22/7 + 0.62] which is equal to 6.25 seconds.
  • the value of t Max is set to the predetermined value.
  • the value of t Max can be set to the value of the predicted door dwell time.
  • the elevator control system commands the door of the elevator car to close at step 312.
  • the system commands the elevator car door to close if the door has been open at least the predetermined maximum amount of time t Max , despite further detection of boarding traffic. In this way, the elevator door will begin to close in spite of a faulty sensor or traffic which is moving toward the elevator car merely as a coincidence and not with the intention of boarding. However, the door could be commanded to close only when boarding traffic is no longer detected.
  • the elevator door will reopen if passengers are still boarding after the elevator door begins to close, either due to the edge of the door contacting a passenger, due to the edge of the door being held by a passenger or due to the "open door" button located inside the elevator car being depressed.
  • the value of t Total is preferably initialized to the value of ⁇ t1, ensuring an accurate value for the total time determined at step 308.
  • the value of t Total can be initialized to zero, provided the value of t Max is adjusted to ensure the desired door dwell time.
  • the present invention therefore, controls the door dwell time of an elevator car door based on traffic conditions.
  • building configuration means the physical attributes of the building which impact traffic flow therethrough, including but not limited to number of floors, number of elevators, elevator speed, location of express zone(s), location of lobby level and/or parking level(s), total building population, and distribution of the population per floor.
EP19910303215 1990-04-12 1991-04-11 Controlling door dwell time Withdrawn EP0452130A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US50832090A 1990-04-12 1990-04-12
US50832190A 1990-04-12 1990-04-12
US508320 1990-04-12
US508321 1990-04-12

Publications (2)

Publication Number Publication Date
EP0452130A2 true EP0452130A2 (fr) 1991-10-16
EP0452130A3 EP0452130A3 (en) 1992-01-22

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EP19910303215 Withdrawn EP0452130A3 (en) 1990-04-12 1991-04-11 Controlling door dwell time

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EP (1) EP0452130A3 (fr)
JP (1) JPH04226293A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544541A2 (fr) * 1991-11-27 1993-06-02 Otis Elevator Company Système d'ascenseur avec temps d'arrêt des portes dynamiquement variable
EP0572926A1 (fr) * 1992-06-01 1993-12-08 KONE Elevator GmbH Procédure et dispositif pour la commande des portes d'ascenseur
WO2010139846A1 (fr) * 2009-06-03 2010-12-09 Kone Corporation Système d'ascenseurs
DE102009049267A1 (de) * 2009-10-13 2011-04-21 K-Solutions Gmbh Verfahren zur Steuerung eines Aufzugs und einer Aufzugsgruppe
CN106744094A (zh) * 2016-11-29 2017-05-31 日立电梯（中国）有限公司 线性检测实时调节电梯开关门时间的方法
CN110114292A (zh) * 2017-03-23 2019-08-09 株式会社日立制作所 电梯管理系统以及电梯管理方法
CN110654963A (zh) * 2018-06-29 2020-01-07 奥的斯电梯公司 自动调整电梯门系统
US10822196B2 (en) 2016-08-09 2020-11-03 Otis Elevator Company Control systems and methods for elevators
US10934135B2 (en) 2015-02-23 2021-03-02 Inventio Ag Elevator system with adaptive door control
CN112435491A (zh) * 2019-08-26 2021-03-02 罗伯特·博世有限公司 乘客门的自动化打开
US11242225B2 (en) 2018-03-15 2022-02-08 Otis Elevator Company Adaptive elevator door dwell time
US11560288B2 (en) 2017-10-30 2023-01-24 Hitachi, Ltd. Elevator operation management system and elevator operation management method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7913820B2 (en) 2005-12-07 2011-03-29 Mitsubishi Electric Corporation Control system for elevator
KR100997017B1 (ko) * 2006-03-20 2010-11-25 미쓰비시덴키 가부시키가이샤 엘리베이터의 도어 장치
JP4606475B2 (ja) * 2008-03-12 2011-01-05 株式会社日立製作所 エレベータのドア制御システムおよび方法
JP5788843B2 (ja) * 2012-08-30 2015-10-07 株式会社日立製作所 エレベータドアシステムおよびエレベータドアシステムを備えるエレベータ
JP6715206B2 (ja) * 2017-03-29 2020-07-01 株式会社日立ビルシステム エレベータシステム
US20200354196A1 (en) * 2019-05-06 2020-11-12 Otis Elevator Company Self-tuning door timing parameters

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404753A (en) * 1967-06-22 1968-10-08 John E. Magee Controls for elevator doors
US3513945A (en) * 1967-01-30 1970-05-26 Reliance Electric Co Elevator standing time and door control
US3545572A (en) * 1967-08-18 1970-12-08 Montgomery Elevator Co Elevator door control
US3580360A (en) * 1967-12-19 1971-05-25 Phillip C Keiper Elevator systems
US4491199A (en) * 1983-06-29 1985-01-01 Westinghouse Electric Corp. Elevator system
US4874063A (en) * 1988-10-27 1989-10-17 Otis Elevator Company Portable elevator traffic pattern monitoring system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513945A (en) * 1967-01-30 1970-05-26 Reliance Electric Co Elevator standing time and door control
US3404753A (en) * 1967-06-22 1968-10-08 John E. Magee Controls for elevator doors
US3545572A (en) * 1967-08-18 1970-12-08 Montgomery Elevator Co Elevator door control
US3580360A (en) * 1967-12-19 1971-05-25 Phillip C Keiper Elevator systems
US4491199A (en) * 1983-06-29 1985-01-01 Westinghouse Electric Corp. Elevator system
US4874063A (en) * 1988-10-27 1989-10-17 Otis Elevator Company Portable elevator traffic pattern monitoring system

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544541A2 (fr) * 1991-11-27 1993-06-02 Otis Elevator Company Système d'ascenseur avec temps d'arrêt des portes dynamiquement variable
EP0544541A3 (en) * 1991-11-27 1993-08-25 Otis Elevator Company Elevator system having dynamically variable door dwell time
EP0572926A1 (fr) * 1992-06-01 1993-12-08 KONE Elevator GmbH Procédure et dispositif pour la commande des portes d'ascenseur
US5518086A (en) * 1992-06-01 1996-05-21 Kone Elevator Gmbh Procedure and apparatus for the control of elevator doors
CN1040967C (zh) * 1992-06-01 1998-12-02 科尼电梯有限公司 控制电梯门的方法和装置
EP2437995A4 (fr) * 2009-06-03 2015-10-21 Kone Corp Système d'ascenseurs
US8573366B2 (en) 2009-06-03 2013-11-05 Kone Corporation Elevator system to execute anticipatory control function and method of operating same
WO2010139846A1 (fr) * 2009-06-03 2010-12-09 Kone Corporation Système d'ascenseurs
EP2437995B1 (fr) 2009-06-03 2019-03-13 KONE Corporation Système d'ascenseurs
DE102009049267A1 (de) * 2009-10-13 2011-04-21 K-Solutions Gmbh Verfahren zur Steuerung eines Aufzugs und einer Aufzugsgruppe
US10934135B2 (en) 2015-02-23 2021-03-02 Inventio Ag Elevator system with adaptive door control
US10822196B2 (en) 2016-08-09 2020-11-03 Otis Elevator Company Control systems and methods for elevators
CN106744094A (zh) * 2016-11-29 2017-05-31 日立电梯（中国）有限公司 线性检测实时调节电梯开关门时间的方法
CN110114292A (zh) * 2017-03-23 2019-08-09 株式会社日立制作所 电梯管理系统以及电梯管理方法
US11560288B2 (en) 2017-10-30 2023-01-24 Hitachi, Ltd. Elevator operation management system and elevator operation management method
US11242225B2 (en) 2018-03-15 2022-02-08 Otis Elevator Company Adaptive elevator door dwell time
CN110654963A (zh) * 2018-06-29 2020-01-07 奥的斯电梯公司 自动调整电梯门系统
US11667498B2 (en) 2018-06-29 2023-06-06 Otis Elevator Company Auto adjust elevator door system
CN112435491A (zh) * 2019-08-26 2021-03-02 罗伯特·博世有限公司 乘客门的自动化打开

Also Published As

Publication number Publication date
JPH04226293A (ja) 1992-08-14
EP0452130A3 (en) 1992-01-22

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