Car controller for an elevator car of an elevator installation, elevator installation, use of a car controller, and method for controlling a car door of an elevator car of an elevator installation

Abstract

A car controller (1) for an elevator car (3) of an elevator device (5), wherein the car controller (1) is configured to be arranged on the elevator car (3), and the car controller (1) is configured to obtain a primary door opening request from an elevator control device (7) of the elevator device (5); obtain at least one monitoring signal, the at least one monitoring signal indicating whether the elevator car (3) is in a state where a car door (9) of the elevator car (3) is set to open; and send or retain a secondary door opening request based on the primary door opening request and the at least one monitoring signal.

Description

Technical Field

[0001] The invention relates to a car controller for an elevator car of an elevator installation, an elevator installation, the use of a car controller and a method for controlling a car door of an elevator car of an elevator installation. Background Art

[0002] Known elevator installations for transporting passengers or loads include an elevator car that can be moved vertically in an elevator shaft. Typically, the elevator car includes a car door that is opened to allow passengers to board or get off a landing, for example, on a floor of a building. In known elevator installations, the elevator installation is controlled by an elevator control device that is arranged, for example, in a machine room of the elevator installation. The elevator control device mainly controls the car door of the elevator car. In order to open the car door, the elevator control device sends a signal for opening the car door to the elevator car, and the car door is then opened. However, in known elevator installations, if the elevator control device fails, the elevator control device may send an erroneous signal to the elevator car to open the car door. Summary of the invention

[0003] The object of the invention is to provide a car controller for an elevator car of an elevator system, in particular to provide an elevator system which is improved compared to elevator control devices or elevator systems known from the prior art, wherein in particular safety precautions for opening a car door should be increased. Furthermore, the object of the invention is to provide a method for controlling a car door of an elevator car of an elevator system.

[0004] This object is achieved by a car control according to claim 1 and by the use and method according to the independent claims. Advantageous developments and embodiments are derived from the dependent claims and from the present description.

[0005] One aspect of the present invention relates to a car controller for an elevator car of an elevator device, the car controller being configured to be arranged on the elevator car, and the car controller being configured to obtain a primary door opening request from an elevator control device of the elevator device; obtain at least one monitoring signal, the at least one monitoring signal indicating whether the elevator car is in a state for opening a car door of the elevator car; and send or retain a secondary door opening request based on the primary door opening request and the at least one monitoring signal.

[0006] Another aspect of the invention relates to an elevator installation comprising an elevator car and a car door with a car controller according to embodiments presented herein; and an elevator control device for controlling the elevator installation.

[0007] A further aspect of the invention relates to the use of a car controller according to the embodiments presented here in an elevator car of an elevator installation.

[0008] Another aspect of the present invention relates to a method for controlling a car door of an elevator car of an elevator device, wherein a primary door opening request is obtained from a car controller of the elevator car; at least one monitoring signal is obtained from the car controller, at least one monitoring signal indicating a state of the elevator car being set for opening the car door of the elevator car; and a secondary door opening request is sent or retained by the car controller based on the primary door opening request and the at least one monitoring signal.

[0009] In a preferred embodiment, the car controller is arranged in or on the elevator car. In particular, the car controller moves with the elevator car. The car controller is preferably arranged on the top of the elevator car. In a preferred embodiment, the car controller is configured to be mounted in or on the elevator car and / or to replace an existing controller of the elevator car. In other preferred embodiments, the car controller is manufactured by modifying an existing controller, by updating the software of an existing controller or by converting an existing controller of the elevator car into a car controller according to the embodiments described herein. In a preferred embodiment, the car controller includes or is a controller, a microcontroller, a control circuit or a circuit board, in particular a printed circuit board (e.g. a "printed circuit board", PCB).

[0010] The elevator control device of the elevator system is preferably arranged outside the elevator car. In particular, the elevator control device does not move with the elevator car. For example, the elevator control device is arranged in the machine room of the elevator system or in the elevator shaft of the elevator system, for example, in the shaft head of the elevator system. The elevator control device is preferably arranged in a fixed position. In particular, the elevator control device is not arranged in the elevator car or on the elevator car. Preferably, the elevator control device comprises a controller, a microcontroller or a computer. In particular, the elevator control device can have a higher complexity and / or computing power than the car controller.

[0011] The elevator control preferably receives input from passengers, such as transportation requests via an internal panel of the elevator car or an external panel on the landing, and receives data about the state of the elevator installation from other controllers and / or sensors, such as data about the movement of the elevator car and / or the position of the elevator car. In particular, the elevator control controls the movement of the elevator car, the shaft door on the landing, and / or the car door of the elevator car to transport passengers.

[0012] When the elevator control determines that the car door should be opened, the elevator control sends a primary door opening request to the car controller of the elevator car. However, it is possible that the elevator control incorrectly determines that the car door should be opened, for example due to erroneous data about the state of the elevator equipment, a defect in the elevator control, a software error, or a transmission error. If the elevator control incorrectly determines that the car door should be opened, the elevator control may incorrectly send a primary door opening request to the car controller.

[0013] In a preferred embodiment, the car controller is configured to obtain the primary door opening request from the elevator control device. The car controller preferably obtains the primary door opening request via a primary signal connection, such as via a wired communication connection between the elevator control device and the car controller.

[0014] In a preferred embodiment, the car controller is configured to obtain at least one monitoring signal, which indicates whether the elevator car is in a state set for opening the car door of the elevator car. As used herein, "indication" means, for example, "display", "indication" or "containing relevant information". The at least one monitoring signal preferably includes at least one piece of information or at least one value, such as a Boolean value or a Boolean signal. The car controller can be configured to obtain at least one monitoring signal from a monitoring signal generator of the elevator system, such as another controller of the elevator system and / or a sensor of the elevator system, such as via a monitoring signal connection between the monitoring signal generator and the car controller.

[0015] The car controller is preferably configured to send or leave a secondary door opening request based on the primary door opening request and the at least one monitoring signal. In a preferred embodiment, the car door is opened when the secondary door opening request is sent, and the car door is not opened when the secondary door opening request is left, in particular when no secondary door opening request is sent or generated. Preferably, the secondary door opening request is sent when the at least one monitoring signal indicates that the elevator car is in a state set for opening the car door. The secondary door opening request is preferably left when the at least one monitoring signal indicates that the elevator car is not in a state set for opening the car door.

[0016] When the secondary door opening request is sent, the secondary door opening request is preferably sent from the car controller to a door opening mechanism for opening the car door. The door opening mechanism comprises, for example, a car door drive configured to open the car door and / or a car door unlocking mechanism for unlocking the car door. When the secondary door opening request is issued, the car door is opened, in particular, by the door opening mechanism. The opening of the car door as a result of the secondary door opening request corresponds to normal operation, for example when the elevator car reaches a travel destination.

[0017] When the secondary door opening request is on hold, the car door is not opened. The on hold preferably includes abandoning the primary door opening request. In other preferred embodiments, the car control is configured to, when the secondary door opening request is on hold, reacquire at least one monitoring signal at least once, and send or hold the secondary door opening request based on the primary door opening request and the reacquired at least one monitoring signal.

[0018] By sending or leaving the secondary door opening request according to the embodiments described herein, the primary door opening request of the elevator control can be checked locally in the elevator car for plausibility, in particular based on at least one monitoring signal. If the primary door opening request sent by the elevator control is erroneous, the secondary door opening request can be left on the basis of at least one monitoring signal. The probability of both an erroneous primary door opening request and an erroneous monitoring signal or a plurality of erroneous monitoring signals being present is lower, in particular significantly lower, than the probability of a single erroneous primary door opening request. In particular, the probability of opening the car door in a state not intended for opening the car door can be reduced. Compared to known elevator installations, the car controller according to the embodiments described herein can increase safety precautions against erroneous opening of the car door. In particular, the error susceptibility when opening the car door can be reduced in the embodiments, since the car controller according to the preferred embodiments has a lower complexity than the elevator control and is, for example, less prone to errors than the elevator control. In addition, the fault susceptibility in the event of an erroneous transmission can be reduced.

[0019] In a preferred embodiment, the at least one monitoring signal comprises at least one from the group of a stop signal, a door zone signal and a door bridge signal.

[0020] The at least one monitoring signal preferably comprises a stop signal, the stop signal indicating the stop or movement of the elevator car. Preferably, the stop signal indicating the stop of the elevator car indicates that the elevator car is in a state arranged for opening the car door. For example, if the elevator car is stationary, even if the primary door opening request is sent in error, the hazard to the passengers may be small.

[0021] In a preferred embodiment, the car door can be opened during a movement of the elevator car under certain conditions, for example during a height-compensated movement of the elevator car in the area of ​​the landing. In particular, in such an embodiment, the stop signal indicating the movement indicates neither a state of the elevator car set for opening the car door nor a state not set for opening. In such an embodiment, the sending or retention of the secondary door opening request can be based, for example, on at least one further monitoring signal.

[0022] In other embodiments, the car door is not normally set to open when the elevator car is moving. In such embodiments, the motion indicating stop signal may indicate that the elevator car is not in a state set for opening the car door. In such embodiments, under the stop signal indicating motion, the secondary door opening request is left in place.

[0023] In an embodiment, the stop signal is provided by a speed sensor of the elevator installation. The speed sensor can be configured to indicate the speed or movement of the elevator car. In particular, the speed sensor can be designed as a speed sensor of an elevator drive. For example, the speed sensor can be a motion sensor, an encoder, a tachometer or a speed controller of the elevator drive. The elevator drive is preferably arranged in a machine room of the elevator installation or in an elevator shaft, for example, in the shaft top of the elevator installation. The stop signal is preferably transmitted via a stop signal connection between the speed sensor and the car controller, for example, via a line or wire along the hoist of the elevator installation, via a network of the elevator installation or via a radio connection.

[0024] In a preferred embodiment, at least one monitoring signal comprises a door zone signal, wherein the door zone signal indicates whether the elevator car is located in a door zone of the elevator installation. The door zone, in particular the door zone of the shaft door, comprises a vertical zone in the region of the shaft door. The door zone of the shaft door is particularly dimensioned such that when the elevator car is in the door zone, the height difference between the landing at the shaft door and the car floor of the elevator car allows safe boarding or exiting of the elevator car. In particular, the door zone is dimensioned such that the height difference is not greater than a limit value, for example a standardized or specified limit value, which is in particular less than 30 cm, in particular less than 20 cm or less than 15 cm.

[0025] The door zone signal is preferably provided by a shaft information system of the elevator car. In particular, the shaft information system is at least partially arranged in or on the elevator car. For example, the shaft information system comprises a door zone sensor on the elevator car, in particular the door zone sensor can be configured for detecting the door zone via a door zone indicator of the shaft information system arranged in the elevator shaft. For example, the door zone sensor can be designed as a light barrier for detecting the door zone, in particular for detecting the door zone using a metal flag arranged in the elevator shaft as a door zone indicator. The door zone signal can be transmitted from the shaft information system to the car controller via a door zone signal connection of the elevator car.

[0026] In a preferred embodiment, at least one monitoring signal comprises a door bridging signal, wherein the door bridging signal indicates whether the car door is allowed to be opened when the elevator car is moving. The door bridging signal is usually used to activate the bridging of the safety circuit on the car door. For example, if the safety circuit is not bridged, the moving elevator car can be braked for safety reasons when the car door is open. When the safety circuit is bridged, the car door can be opened even when the elevator car is moving. In particular, the door bridging signal is sent to the car controller when the speed of the elevator car is below the speed limit value, for example during height leveling between the car floor of the elevator car and the floor of the landing platform or when or during the arrival of the elevator car in the door zone slightly before. Opening the car door while the elevator car is still moving is usually used to increase the transport speed of the elevator installation.

[0027] Preferably, the door bridging signal indicates that the car door is allowed to be opened during the movement when the speed of the elevator car is less than a speed limit value. The speed limit value may be a standardized or specified speed limit value. For example, the speed limit value may be less than 1 m / s, in particular less than 0.8 m / s or less than 0.3 m / s. In a preferred embodiment, the door bridging signal is provided by the elevator control device. For example, the door bridging signal may be sent to the car controller via the primary signal connection.

[0028] In a preferred embodiment, the car controller is configured to send a secondary door opening request, in particular just when or only when the car controller obtains the primary door opening request and the stop signal indicates that the elevator car is in a stopped state, or when the car controller obtains the primary door opening request and the stop signal indicates that the elevator car is moving and the door zone signal indicates that the elevator car is in the door zone and the door bridging signal indicates that the car door is allowed to open.

[0029] In other preferred embodiments, the car controller is configured to send a secondary door opening request, in particular just when or only when the car controller receives the primary door opening request and the stop signal indicates that the elevator car is in a stopped state and the door zone signal indicates that the elevator car is in the door zone, or when the car controller receives the primary door opening request and the stop signal indicates that the elevator car is moving and the door zone signal indicates that the elevator car is in the door zone and the door bridging signal indicates that the car door is allowed to open.

[0030] In an exemplary embodiment, the car controller is configured to, upon obtaining the primary door opening request and the monitoring signal, send or hold the secondary door opening request in the following order based on the inspection of the monitoring signal. First, the car controller checks the stop signal. If the stop signal indicates that the elevator car is in a stopped state, the car controller sends the secondary door opening request. Alternatively, if the stop signal indicates the stopped state of the elevator car, the car controller may check the door zone signal. If the door zone signal indicates that the elevator car is in the door zone, the car controller sends the secondary door opening request, or if the door zone signal indicates that the elevator car is not in the door zone, the secondary door opening request is held. If the stop signal indicates that the elevator car is moving, the car controller next checks the door zone signal. If the door zone signal indicates that the elevator car is not in the door zone, the car controller holds the secondary door opening request. If the door zone signal indicates that the elevator car is in the door zone, the car controller next checks the door bridge signal. If the door bridge signal indicates that the car door is not allowed to be opened, the car controller holds the secondary door opening request. If the door bridge signal indicates that the car door is allowed to open, the car controller sends a secondary door open request.

[0031] In a preferred embodiment, at least one of the group of stop signal, door zone signal and door bridge signal is a Boolean signal or Boolean value or is converted into a Boolean signal or value by the car controller, for example by using a threshold method.

[0032] The elevator installation according to a preferred embodiment comprises an elevator car with a car controller according to the embodiments described herein. The elevator car comprises a car door, which can preferably be opened and / or closed by a door opening mechanism. The elevator car is preferably arranged in an elevator shaft and can be moved vertically in particular. The elevator car is connected to the counterweight via a sling. To move the elevator car, the sling is driven by an elevator drive. The elevator drive is arranged, for example, in the machine room of the elevator installation or in the top of the shaft of the elevator installation.

[0033] According to an embodiment, the elevator installation comprises an elevator control device for controlling the elevator installation. The elevator control device is preferably arranged in a fixed manner. In a preferred embodiment, the elevator installation comprises at least one monitoring signal generator for providing at least one monitoring signal. For example, the elevator installation comprises a speed sensor of the elevator drive, in particular for providing a stop signal, and / or the elevator installation comprises a shaft information system, in particular for providing a door zone signal. In particular, the elevator control device can be configured to provide a door bridging signal.

[0034] A preferred embodiment of the method for controlling a car door comprises: controlling the car door when using a car controller according to the embodiments described herein, in particular an elevator control device of an elevator installation. The method preferably comprises sending a primary door opening request by the elevator control device of the elevator installation. In a preferred embodiment, the method comprises: acquiring the primary door opening request by the car controller.

[0035] The method comprises: obtaining at least one monitoring signal by a car controller, the at least one monitoring signal indicating whether the elevator car is in a state set for opening a car door of the elevator car. The at least one monitoring signal preferably comprises at least one from the group of a stop signal, a door zone signal and a door bridging signal. The method preferably comprises: sending or retaining a secondary door opening request by the car controller based on the primary door opening request and at least one monitoring signal. In particular, the sending or retaining based on the at least one monitoring signal comprises checking the at least one monitoring signal, for example as described herein for the car controller. A preferred embodiment of the method can be executed on the car controller, for example as a program for execution, wherein the car controller can be designed in particular as a microcontroller, a circuit board, a printed circuit ("printed circuit board", PCB) or a control circuit.

[0036] Preferred embodiments may provide advantages over the prior art in that safety precautions against erroneous opening of the car door are improved. In particular, an additional protection mechanism may be provided by a local check of the credibility of the primary door opening request. Another advantage may be that the check of the primary door opening request is performed at least partially independently of the elevator control. The likelihood of erroneous opening of the car door may be reduced, in particular due to the low susceptibility to errors in a car controller which is less complex than the elevator control. Another advantage may be that a car controller according to an embodiment may be manufactured by replacing or modifying an existing controller of an elevator car. In particular, the embodiments presented herein may provide a cost-effective solution for improving the safety of the car door. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various aspects of the present invention are explained in more detail below in conjunction with embodiments with reference to the accompanying drawings.

[0038] in:

[0039] Figure 1 A schematic diagram showing a preferred embodiment of a car controller in an elevator installation;

[0040] Figure 2 A schematic diagram showing a preferred method for controlling a car door;

[0041] Figure 3A schematic diagram showing another preferred embodiment of a car controller in an elevator installation; and

[0042] Figure 4 A schematic diagram shows another preferred method for controlling a car door. DETAILED DESCRIPTION

[0043] Figure 1 The schematic diagram of an elevator system 5 is shown with an elevator car 3 and a car controller 1 of the elevator car 3. The elevator car 3 is arranged in an elevator shaft 19 of the elevator system 5. The elevator car 3 is connected to a counterweight (not shown) via a sling 15. To move the elevator car 3, the sling 15 is driven by an elevator drive 11 of the elevator system 5. The elevator car 3 comprises a car door 9, which can be opened and closed by a door opening mechanism 17. Figure 1 The elevator installation 5 comprises landings 27 and shaft doors 25 on a plurality of floors.

[0044] The elevator device 5 comprises an elevator control device 7 for controlling the elevator device 5. The elevator control device 7 is arranged, for example, in a machine room 31 of the elevator device 5 and is connected to the elevator device 5 via a primary signal connection 41 (at Figure 1 The elevator control device 7 is in communication connection with the car controller 1 of the elevator car 3 (e.g., a communication line). The elevator control device 7 controls in particular the movement of the elevator car 3, the opening and closing of the shaft door 25 and / or the opening and closing of the car door 9 via the car controller 1. The elevator control device 7 controls the elevator system 5, for example, based on inputs from passengers in the elevator car 3 and / or on the landing platform 27, and based on data about the state of the elevator system 5, for example, based on data about the position and speed of the elevator car 3.

[0045] When the elevator control device 7 correctly or incorrectly determines that the car door 9 of the elevator car 3 should be opened, the elevator control device 7 sends a primary door opening request to the car controller 1 via the primary signal connection 41. Figure 1 The car controller 1 is arranged on top of the elevator car 3 by way of example. The car controller 1 is connected to the door opening mechanism 17 of the elevator car 3 via the secondary signal connection 43. In addition, the car controller 1 is connected to the monitoring signal generator 33 via the monitoring signal connection 35. Figure 1 In the embodiment, the monitoring signal generator 33 is arranged in the machine room 31 by way of example. In other embodiments, at least one monitoring signal generator 33 can be arranged in particular in or on the elevator car 3, in the elevator shaft 19 and / or in the machine room 31.

[0046] The car controller 1 is particularly configured to perform a combination of Figure 2The method 100 is described, for example, as a program for execution on the car controller 1. However, the method 200 can also be executed in other ways, in particular in different ways of the elevator system. Figure 3 At 110, the car controller 1 obtains the primary door opening request 7 that has been sent by the elevator control device. At 120, the car controller 1 obtains at least one monitoring signal, in particular a monitoring signal from the monitoring signal generator 33. The at least one monitoring signal indicates whether the elevator car 3 is in a state set for opening the car door 9.

[0047] If (123) at least one monitoring signal indicates that the elevator car 3 is not in a state set for opening the car door 9, then at 140, a secondary door opening request is left on hold, in particular not sent to the door opening mechanism 17 of the elevator car 3. The car door 9 of the elevator car 3 remains closed at 140. If (125) at least one monitoring signal indicates that the elevator car 3 is in a state set for opening the car door 9, then at 130, a secondary door opening request is sent, in particular to the door opening mechanism 17 of the elevator car 3. After 130, the door opening mechanism 17 opens the car door 9.

[0048] Figure 3 Another preferred embodiment of the car controller 1 in the elevator system 5 is shown. Figure 1 The same or similar features are denoted by the same reference numerals and will not be described in detail below for the sake of clarity. Figure 3 In the embodiment, the car controller 1 is in communication connection with the elevator control 7 via the primary signal connection 41. The elevator control 7 is configured to send a primary door opening request to the car controller 1 when the elevator control 7 determines that the car door 9 of the elevator car 3 should be opened. Figure 3 The elevator control device 7 is further configured to provide a door bridging signal to the car controller 1, in particular when the conditions of the safety circuit for bridging the car door are met. For example, the above conditions can be met when the elevator car moves slower than the speed limit value, in particular during the height compensation between the car floor 29 and the landing platform 27 of the elevator car and / or during the elevator car 3 reaching the door zone 21 of the shaft door 25.

[0049] The car controller 1 is in communication with the speed sensor 13 of the elevator drive 11 via the stop signal connection 45. Figure 3 In the embodiment, the speed sensor 13 is provided by a motion sensor, for example by an encoder of the elevator drive 11 indicating movement or stop. The speed sensor 13 provides a stop signal to the car controller 1, wherein the stop signal indicates movement or stop of the elevator car 3.

[0050] The car controller 1 is in communication connection with the shaft information system 23 via a door zone signal connection 47. The shaft information system 23 is configured to provide a door zone signal to the car controller 1. The door zone signal indicates whether the elevator car 3 is in the door zone 21 of the shaft door 25. Figure 3 2 shows only one door zone 21 by way of example, wherein each shaft door 25 has a corresponding door zone 21. The door zone 21 of the shaft door 25 is set in such a way that the height difference between the landing platform 27 corresponding to the door zone 21 and the car floor 29 of the elevator car 3 located in the door zone 21 is not greater than a limit value, for example, 15 centimeters. The shaft information system 23 comprises, for example, a light barrier arranged on the elevator car 3, which is arranged to detect a metal flag arranged in the elevator shaft 19. The metal flag is arranged in such a way that the light barrier detects the metal flag when the elevator car 3 is in the door zone 21 corresponding to the metal flag.

[0051] Figure 3 The car controller 1 in the embodiment is also in communication connection with the door opening mechanism 17 via the secondary signal connection 43. When the elevator control device 7 determines that the car door 9 should be opened, the elevator control device 7 sends a primary door opening request to the car controller 1. The car controller 1 checks the primary door opening request for plausibility in conjunction with at least one of the stop signal, the door zone signal and the door bridge signal, and determines whether to send or to withhold the secondary door opening request.

[0052] In particular, the car controller 1 is configured to perform a combination of Figure 4 The method 200 is explained. However, the method 200 can also be implemented in a different way, in particular in an embodiment of the elevator installation that differs from the described embodiment. At 210, the car controller 1 acquires a primary door opening request. The car controller 1 acquires at least one monitoring signal, wherein acquiring at least one monitoring signal comprises acquiring a stop signal, in particular at 220, acquiring a door zone signal, in particular at 230, and acquiring a door bridge signal, in particular at 240. At 220, the car controller 1 checks the stop signal, which is provided in particular by the speed sensor 13. If (223) the stop signal indicates that the elevator car 3 is stopped, the car controller sends a secondary door opening request at 250, in particular to the door opening mechanism 17 of the elevator car 3, in order to open the car door 9.

[0053] If (225) the stop signal indicates movement of the elevator car 3, the car controller 1 checks at 230 a door zone signal, which is provided in particular by the shaft information system 23. If (233) the door zone signal indicates that the elevator car 3 is not in the door zone 21, the car controller 1 places the secondary door opening request on hold at 260. The primary door opening request is abandoned and the car door 9 remains closed.

[0054] If (235) the door zone signal indicates that the elevator car 3 is in the door zone 21, the car controller checks at 240 a door bridge signal, in particular provided by the elevator control device 7. If (243) the door bridge signal indicates that opening of the car door is not permitted during the movement of the elevator car, the car controller 1 leaves the secondary door opening request at 260. The primary door opening request is abandoned and the car door 9 remains closed. If (245) the door bridge signal indicates that opening of the car door 9 is permitted during the movement of the elevator car 3, for example when the speed of the elevator car 3 is less than the speed limit value, the car controller 1 sends a secondary door opening request at 250, in particular to the door opening mechanism 17 of the elevator car 3, to open the car door 9.

[0055] The probability of passengers being endangered by an erroneous primary door opening request is reduced by the exemplary method 200 or other preferred embodiments. In particular, opening the car door when the elevator car is stationary may be relatively harmless. In the case of the elevator car moving, if the elevator car is located in the door zone and the door bridging is activated, it is not particularly dangerous. Therefore, the preferred embodiments can increase safety precautions to protect passengers, among other things.

Claims

1. A car controller (1) for an elevator car (3) of an elevator installation (5), wherein: The car controller (1) is configured to be arranged on an elevator car (3), and the car controller (1) is configured to: Obtaining a primary door opening request from an elevator control device (7) of an elevator device (5); Acquiring at least one monitoring signal, the at least one monitoring signal indicating whether the elevator car (3) is in a state set for opening a car door (9) of the elevator car (3), the at least one monitoring signal comprising a door zone signal, the door zone signal indicating whether the elevator car (3) is located in a door zone (21) of the elevator device (5), the at least one monitoring signal comprising a door bridging signal, and the door bridging signal indicating whether opening of the car door (9) is permitted when the elevator car (3) is moving; and Based on the primary door opening request and the at least one monitoring signal, a secondary door opening request is sent or put on hold.

2. The car controller (1) according to claim 1, wherein: The at least one monitoring signal comprises a stop signal, which indicates a stop or movement of the elevator car (3).

3. The car controller (1) according to claim 2, wherein: The stop signal is provided by a speed sensor (13) of the elevator device (5).

4. The car controller (1) according to claim 1, wherein: The door zone signal is provided by a shaft information system (23) of the elevator car (3).

5. The car controller (1) according to claim 1, wherein: When the speed of the elevator car (3) is below a speed limit value, opening of the car door (9) is allowed during movement.

6. The car controller (1) according to claim 1 or 5, wherein: The door bridging signal is provided by the elevator control device (7).

7. The car controller (1) according to claim 2 or 3, wherein: The car controller (1) is configured to send a secondary door opening request in the following situations: The car controller (1) receives a primary door opening request, and a stop signal instructs the elevator car (3) to stop; or The car controller (1) obtains the primary door opening request, and the stop signal indicates that the elevator car (3) is moving, and the door zone signal indicates that the elevator car (3) is located in the door zone (21), and the door bridge signal indicates that: the car door (9) is allowed to open.

8. The car controller (1) according to claim 2 or 3, wherein: At least one of the group of the stop signal, the gate zone signal, and the gate bridge signal is a Boolean signal.

9. An elevator device (5), comprising: An elevator car (3) and an elevator control device (7) for controlling an elevator device (5), wherein the elevator car has: A car controller (1) according to any one of claims 1 to 8, and Car door (9).

10. The elevator installation (5) according to claim 9, wherein: The elevator control device (7) is arranged in a fixed position.

11. Use of a car controller (1) according to any one of claims 1 to 8 in an elevator car (3) of an elevator installation (5).

12. A method (100) for controlling a car door of an elevator car of an elevator installation, the elevator car having a car controller according to any one of claims 1 to 8, the method comprising the following steps: The car controller obtains (110) a primary door opening request; At least one monitoring signal is acquired (120) by the car controller, wherein: The at least one monitoring signal indicates a state of an elevator car, the state of the elevator car being configured to open a car door of the elevator car; as well as Based on the primary door opening request and the at least one monitoring signal, a secondary door opening request is sent (130) or retained (140) by the car controller.

13. The method (100) according to claim 12, wherein: Before obtaining (110) the primary door opening request, the method (100) comprises: an elevator control device of the elevator installation sends the primary door opening request.

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