EP1714933A1 - Système de commande de vitesse d'ascenseur - Google Patents

Système de commande de vitesse d'ascenseur Download PDF

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Publication number
EP1714933A1
EP1714933A1 EP06112647A EP06112647A EP1714933A1 EP 1714933 A1 EP1714933 A1 EP 1714933A1 EP 06112647 A EP06112647 A EP 06112647A EP 06112647 A EP06112647 A EP 06112647A EP 1714933 A1 EP1714933 A1 EP 1714933A1
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EP
European Patent Office
Prior art keywords
elevator car
speed
brake
car
detection system
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.)
Granted
Application number
EP06112647A
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German (de)
English (en)
Other versions
EP1714933B1 (fr
Inventor
Rudolf Eckenstein
Carlos Latorre Marcuz
Eric Birrer
Karsten Gensicke
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Inventio AG
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Inventio AG
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Publication date
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Priority to EP06112647.0A priority Critical patent/EP1714933B1/fr
Publication of EP1714933A1 publication Critical patent/EP1714933A1/fr
Application granted granted Critical
Publication of EP1714933B1 publication Critical patent/EP1714933B1/fr
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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
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical

Definitions

  • the invention relates to a method and a detection system for monitoring the speed of an elevator car, wherein the movement of a traction sheave driving the elevator car and a counterweight is detected and evaluated and in case of an unauthorized deviation of the speed of the elevator car from a speed specification, a delay is initiated according to the definition of the independent claims.
  • a disadvantage of the known device is that consuming hardware is necessary for monitoring the cable drum, which is expensive to purchase and maintain.
  • the invention aims to remedy this situation.
  • the invention as characterized in the independent patent claims, solves the problem of avoiding the disadvantages of the known device and to provide a method by means of which the speed of an elevator car can be monitored by simple means.
  • the movement of a traction sheave driving the elevator car and a counterweight is detected and evaluated and a deceleration of the elevator car is initiated in the event of an overspeed of the elevator car or in the case of an unauthorized deviation of the speed of the elevator car from a speed specification, wherein monitoring is performed whether the elevator car is delayed according to predetermined specifications and if the delay is in accordance with the predetermined specifications is further monitored whether the elevator car leaves its standstill position and / or if the delay of the elevator car has not run according to the predetermined specifications or if the elevator car is a standstill position has left, a brake is activated, which locks the elevator car.
  • a measuring system detects the movement of the traction sheave driving the elevator car and a counterweight and a computer evaluates signals of the measuring system, which computer initiates a deceleration process in case of overspeed of the elevator car, the detection system, when an overspeed limit is exceeded Opens the overspeed of the elevator car at time zero of the detected as open safety circuit and the detection system monitors after a certain time from the time zero, whether the speed of the elevator car is less than the overspeed and wherein the detection system after a certain time from Time zero monitors whether the elevator car's speed is less than half the overspeed, and after a certain time from time zero, the detection system monitors whether the elevator car's speed is less than a stall speed.
  • a brake is activated if the monitored speed does not fall below predetermined values or if the elevator car has left the standstill position.
  • a brake for example, a rope brake or a cabin brake or a safety gear can be provided.
  • the rope brake is fixedly arranged on the building body or on the supporting structure of the elevator and acts on the supporting cables acting as suspension means. In case of braking, the suspension cables are fixed.
  • the car brake or the safety gear is arranged on the elevator car and acts on fixed guide rails. The brake may also be provided for braking the counterweight.
  • Fig. 1 has been separated for illustrative reasons along the line L in Fig. 1a and Fig. 1b, which together show a block diagram of a device for monitoring the speed of an elevator car.
  • the Means, called in the further detection system 1 consists essentially of a two-channel computer 2 with channel A and channel B, from actuated in a safety circuit 3 of the elevator control actuators 4A, 4B, from each channel A, B a measuring system 5A, 5B for detecting the movement the traction sheave driving the elevator car and the counterweight, from a sensor 6 for monitoring a brake, from a sensor 7 for monitoring the pressure medium (for example compressed air) of the brake, which acts brakingly on the cable strand guided over the traction sheave, from an actuator 8 for ventilation the brake against a spring force, a converter 9 for the voltage-moderate conversion of sensor signals and a power supply 10 for the computer 2, for the actuators and for the sensors.
  • a measuring system 5A, 5B for detecting the movement the
  • a measuring system 11A, 11B monitoring the rotational movement of the drive motor can also be connected to the computer 2 per channel.
  • a memory 12A, 12B is provided. Maintenance personnel can communicate with the computer 2 by means of a man-machine interface 13.
  • the measuring system 5A, 5B can detect the movement of the traction sheave shaft or the movement of the traction sheave circumference, wherein, for example, scannable magnetic poles or optically scannable code slices are provided. With the measuring signals, for example, the speed or the position of the elevator car can be determined.
  • the optional measuring system 11A, 11B monitoring the rotational movement of the drive motor has a comparable construction.
  • the human-machine interface 13 consists for example of a keyboard for the input of data and parameters and of a display for the visualization of data and operating states.
  • Per channel A, B, an actuator 4A, 4B, for example a relay, is provided in the safety circuit 3.
  • the relay is controlled by the microprocessor ⁇ PA, ⁇ PB via the line TRIA1, TRIB1, the microprocessor ⁇ PA, ⁇ PB monitoring the switching state of the relay by means of the line FDBA, FDBB.
  • the microprocessor ⁇ PA, ⁇ PB monitors the state of the safety circuit 3 by means of the current sensor CUDA, CUDB.
  • a compressed air-operated brake wherein the compressed air by means of actuator 8, for example, a solenoid valve is switchable and the pressure by means of sensor 7, for example, a pressure transducer is measurable, wherein the pressure measured at the brake PRS is converted into an electrical signal.
  • actuator 8 for example, a solenoid valve is switchable and the pressure by means of sensor 7, for example, a pressure transducer is measurable, wherein the pressure measured at the brake PRS is converted into an electrical signal.
  • an actuator 14A, 14B for example, a switch is provided for each channel A, B.
  • the switch is controlled by the microprocessor ⁇ P by means of the line TRIA2, TRIB2.
  • the brake is released if both actuators 14A, 14B are closed, with the compressed air overcoming the spring force of brake springs.
  • With the sensor 6 it is determined whether the brake is released or closed. A drive of the elevator car will be released only if the sensor 7 detects the corresponding pressure PRS in the pressure medium and the sensor 6 detect
  • the signals of the sensors 6,7 are converted by means of the converter 9 into microprocessor-compatible signals.
  • the 24V signals are converted into 5V signals by means of transducers UCONA1, UCONA2, UCONA3, UCONA4 UCONB1, UCONB2, UCONB3, UCONB4 and supplied galvanically separated to the corresponding microprocessor ⁇ PA, ⁇ PB.
  • the power supply 10 generates the necessary supply voltages for the operation of the detection system 1, wherein the mains voltage 110-240 VAC is converted by means of transformer / rectifier TRRE in a low-voltage DC voltage LVDC.
  • 5 volts (5V) are generated by the feed S1 ⁇ PA, S1 ⁇ PB for the calculator 2
  • 5V are generated by feed S1CA
  • S1CB for the measuring systems 5A, 5B, 11A, 11B, 12V are generated by feeding S1REL to the actuators 4A, 4B
  • 24V (24V) are generated by supply S2 ⁇ PA
  • 24V are generated by feeding S1MV to the actuator 8
  • 24V are generated by feeding S1SW to the sensors 6,7.
  • microprocessors ⁇ PA, ⁇ PB communicate with each other via data lines UART1, UART2 as well as NPORT and MPORT.
  • FIG. 2 shows a diagram for illustrating the operating states of the detection system 1
  • FIG. 3 shows the associated speed diagram of the elevator car.
  • the representation shown in FIG. 2 is based on the state / event technique in which circles mean states of the system. Arrows with text or reference symbols symbolize events that trigger a transition from one state to another state. Actions are symbolized with rectangles and text or reference signs. For better readability, events or actions are shown in bold in the description.
  • State 1 (circle with a 1) means normal driving condition. While driving the elevator car as an overspeed v os called the elevator car speed limits is monitored. Safety circuit 3 is normally closed. When crossing EXC the Overspeed limit V os the safety circuit 3 is opened.
  • the actuators or relays 4A, 4B are controlled by the microprocessors ⁇ PA, ⁇ PB by means of the lines TRIA1, TRIB1, the microprocessors ⁇ PA, ⁇ PB monitoring the switching state of the relays 4A, 4B by means of the lines FDBA, FDBB.
  • the action safety circuit 3 open with relay open OR symbolized in a rectangle.
  • the event safety circuit detected as open SCDO (detected by the microprocessors ⁇ PA, ⁇ PB) triggers a transition from state 1 to state 2.
  • State 2 (circle with a 2) means delay state.
  • the drive unit engine, brake
  • the speed vel_decel of the elevator car at time zero of the safety circuit 3 detected as being opened has been stored. After a certain time t1, for example 500 ms, measured from time zero, the speed of the elevator car must be less than vel_decel.
  • the microprocessors ⁇ PA, ⁇ PB prepare the current data of the measuring system 5A, 5B and compare them with vel_decel. If this condition (event too small delay DETL) is not reached, the transition to state 4 (brake state with brake) is triggered. (Action open relay OR and brake trigger TRRB).
  • the speed of the elevator car After a certain time t2, for example 2s, measured from the time zero, the speed of the elevator car must be less than vel_decel / 2.
  • the microprocessors ⁇ PA, ⁇ PB prepare the current data of the Measuring system 5A, 5B and compare them with vel_decel / 2. If this condition (event too small delay DETL) is not reached, the transition to state 4 (brake state with brake) is triggered.
  • a certain time t3 for example 4s, measured from the time zero, the speed of the elevator car must be less than a standstill speed v stand_still .
  • the microprocessors ⁇ PA, ⁇ PB prepare the current data of the measuring system 5A, 5B and compare it with v stand_still . If this condition (event too small delay DETL) is not reached, the transition to state 4 (brake state with brake) is triggered.
  • the state 3 (circle with a 3) with the event speed of the elevator car smaller than stand_still (abs (vel) ⁇ v stand_still ) is reached, the current position of the elevator car is stored as a standstill position, the microprocessors .mu.PA, .mu.PB the current data of the measuring system 5A, 5B prepare and determine the standstill position of the elevator car. If the elevator car exceeds a certain deviation stand_still_tolerance (eg 50 mm) from the standstill position when the safety circuit 3 is open, the transition to state 4 (brake state with brake) is triggered.
  • a certain deviation stand_still_tolerance eg 50 mm
  • the actuators 4A, 4B are activated (event at least 2s standstill ST2S).
  • the action safety circuit 3 close with relay close CR symbolized in a rectangle.
  • the event safety circuit detected as closed SCDC (detected by the microprocessors ⁇ PA, ⁇ PB) triggers a transition from state 3 to state 1.
  • State 2 or state 3 can trigger the transition to the braking state with brake (circle with a 4).
  • the brake acting directly on the suspension cables of the elevator car is activated, wherein at least one actuator 14A, 14B is deactivated.
  • compression springs generate the braking force on the suspension cables.
  • the actuators 14A, 14B are activated and the actuator 8 according to FIG. 1 is supplied with power, wherein the compressed air counteracts the spring force and releases the brake.
  • the state 4 can not be left.
  • a reset of state 4 can only be done by switching the mains voltage off / on.
  • FIGS. 2 and 3 are stored in coded form in the program memory 12A, 12B and are executed by the microprocessors .mu.PA, .mu.PB.
  • the monitoring of the standstill position of the elevator car is particularly important when entering and exiting or when the car door and shaft door open. Normally, in the case of a floor stop, the threshold of the car door is approximately flush with the threshold of the shaft door. If the elevator car leaves its standstill position, a height difference arises between the sleepers, which can lead to accidents when entering and exiting. In extreme cases, a gap and thus an open elevator shaft can arise between the elevator car and the floor.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP06112647.0A 2005-04-21 2006-04-13 Système de commande de vitesse d'ascenseur Active EP1714933B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06112647.0A EP1714933B1 (fr) 2005-04-21 2006-04-13 Système de commande de vitesse d'ascenseur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05103256 2005-04-21
EP06112647.0A EP1714933B1 (fr) 2005-04-21 2006-04-13 Système de commande de vitesse d'ascenseur

Publications (2)

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EP1714933A1 true EP1714933A1 (fr) 2006-10-25
EP1714933B1 EP1714933B1 (fr) 2015-12-23

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EP06112647.0A Active EP1714933B1 (fr) 2005-04-21 2006-04-13 Système de commande de vitesse d'ascenseur

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9422133B2 (en) 2011-02-28 2016-08-23 Otis Elevator Company Elevator car control in a landing zone using a machine brake in response to undesired car movement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124101A (en) * 1975-10-29 1978-11-07 Mitsubishi Denki Kabushiki Kaisha Elevator speed control apparatus
US4128142A (en) * 1976-02-16 1978-12-05 Mitsubishi Denki Kabushiki Kaisha Elevator speed control system
US4130184A (en) * 1976-05-27 1978-12-19 Mitsubishi Denki Kabushiki Kaisha Elevator speed control system
US4263988A (en) * 1977-11-04 1981-04-28 Hitachi, Ltd. Speed control system for a motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124101A (en) * 1975-10-29 1978-11-07 Mitsubishi Denki Kabushiki Kaisha Elevator speed control apparatus
US4128142A (en) * 1976-02-16 1978-12-05 Mitsubishi Denki Kabushiki Kaisha Elevator speed control system
US4130184A (en) * 1976-05-27 1978-12-19 Mitsubishi Denki Kabushiki Kaisha Elevator speed control system
US4263988A (en) * 1977-11-04 1981-04-28 Hitachi, Ltd. Speed control system for a motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9422133B2 (en) 2011-02-28 2016-08-23 Otis Elevator Company Elevator car control in a landing zone using a machine brake in response to undesired car movement

Also Published As

Publication number Publication date
EP1714933B1 (fr) 2015-12-23

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