EP4045450A1 - Procédé de surveillance d'une cabine d'ascenseur - Google Patents

Procédé de surveillance d'une cabine d'ascenseur

Info

Publication number
EP4045450A1
EP4045450A1 EP20796500.5A EP20796500A EP4045450A1 EP 4045450 A1 EP4045450 A1 EP 4045450A1 EP 20796500 A EP20796500 A EP 20796500A EP 4045450 A1 EP4045450 A1 EP 4045450A1
Authority
EP
European Patent Office
Prior art keywords
area
elevator car
optical sensor
elevator
monitoring
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.)
Pending
Application number
EP20796500.5A
Other languages
German (de)
English (en)
Inventor
Johannes Schober
Oliver Krauss
David Baumgartner
Daniel DORFMEISTER
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.)
View Promotion GmbH
Original Assignee
View Promotion GmbH
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 View Promotion GmbH filed Critical View Promotion GmbH
Publication of EP4045450A1 publication Critical patent/EP4045450A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0012—Devices monitoring the users of the elevator system
    • 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
    • B66B1/36—Means for stopping the cars, cages, or skips at predetermined levels
    • B66B1/40—Means for stopping the cars, cages, or skips at predetermined levels and for correct levelling at landings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0018—Devices monitoring the operating condition of the elevator system
    • B66B5/0025—Devices monitoring the operating condition of the elevator system for maintenance or repair
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/021—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system
    • B66B5/025—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions the abnormal operating conditions being independent of the system where the abnormal operating condition is caused by human behaviour or misbehaviour, e.g. forcing the doors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/50—Context or environment of the image
    • G06V20/52—Surveillance or monitoring of activities, e.g. for recognising suspicious objects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/50—Context or environment of the image
    • G06V20/59—Context or environment of the image inside of a vehicle, e.g. relating to seat occupancy, driver state or inner lighting conditions
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/60—Type of objects
    • G06V20/64—Three-dimensional objects

Definitions

  • the invention relates to a method for monitoring an elevator car by means of at least one optical sensor, the at least one optical sensor capturing image data and position data correlating with the image data in a monitoring area of the elevator car, the image data and position data by means of a first data connection to one arranged in the elevator car Evaluation device are transmitted, as well as a system for monitoring an elevator car comprising at least one optical sensor, which is designed to capture image data and position data correlating with the image data, an evaluation device, which evaluation device is connected to the at least one optical sensor by means of a first data connection.
  • an elevator system is used to transport objects, namely people and / or objects, between different floors of a building and is part of the technical field of discontinuous conveyors.
  • an elevator system can comprise one or more elevator cars, in the interior of which the passengers or objects are transported.
  • elevator cars have an elevator door which is open for a person to get in or out or for loading or unloading an object and which is closed during movement between the floors.
  • the elevator car has an interior area which is delimited by a floor area, a ceiling area and a plurality, usually four, side areas, one of the side areas having a door opening with the elevator door.
  • Several elevator systems, which have different areas of application, can also be provided in a building. Every elevator car is arranged in an elevator shaft and moves during a journey between two floors from a landing point on one floor to a landing point on another floor.
  • a method for monitoring an elevator car is known from WO 2019/076917 A1 in which image data and position data in a monitoring area are recorded by means of a depth camera by means of an optical sensor and the entry and exit of objects by comparing the recorded data with at least one reference image is recorded and corresponding data objects are generated.
  • occlusion entries are generated in the corresponding data objects when an object is no longer detected by the optical sensor without its departure being detected.
  • a disadvantage of the prior art is expressed in the fact that the detection of objects in the monitoring area is made significantly more difficult or incorrect detection of objects occurs when large-area optical effects, such as reflection or transmission effects, occur in the monitoring area.
  • large-area optical effects such as reflection or transmission effects
  • This can be the case, for example, if in the interior at least one of the side walls has a reflective surface or if one or more large-area mirrors are provided in the interior or if one of the side walls is made of a transparent or semi-transparent transparent material, in particular made of glass.
  • the effects on the surface of the walls can lead to incorrect multiple detections, for example if a person is reflected in a side surface.
  • This object is achieved in a method according to the invention for monitoring an elevator car by means of at least one optical sensor, the at least one optical sensor capturing image data and position data correlating with the image data in a monitoring area of the elevator car, the image data and position data being sent to an in the Elevator car arranged evaluation device are transmitted, achieved in that in the evaluation device from the transmitted image data and position data, a spatial structure of the
  • Monitoring area is determined at least approximately and at least one virtual boundary surface corresponding at least in sections to the spatial structure of the monitoring area is generated, the monitoring only being based on image data whose correlating position data are on a side of the at least one virtual boundary surface facing the at least one optical sensor . Since the monitored area can theoretically have any spatial shape, it is necessary in a first step to determine the spatial structure of the monitored area at least approximately. This step is usually carried out as part of an initial start-up, with no passengers or variable objects in the surveillance area. As a rule, the spatial structure is defined by boundary elements such as walls, floors or ceilings or their surfaces.
  • the spatial structure can be determined at least approximately in the evaluation device, since boundary objects such as walls, floors or ceilings are recognized and assigned at least in sections based on the position data . It is not absolutely necessary to scan or recognize an entire delimiting object, since the expected shape of the delimiting element can already be determined at least approximately from a recognized section of the delimiting element. For example, it can be inferred from a determined horizontally oriented surface piece which encloses a right angle with an adjoining perpendicularly oriented surface piece that it is a floor surface and a side surface delimiting it.
  • the virtual boundary surface can correspond to a real boundary surface of a boundary element, for example a wall, a floor or a ceiling.
  • the spatial orientation of the real boundary surface or approximately certain boundary surface of the spatial structure essentially coincides with the spatial orientation of the corresponding virtual boundary surface.
  • a virtual boundary surface or each virtual boundary surface preferably corresponds over its entire extent to the corresponding boundary surface.
  • the virtual boundary surface can coincide with the real or approximately determined boundary surface.
  • the virtual delimitation surface is, in particular slightly, spaced from the corresponding section of the determined spatial structure. It is advantageous if the virtual delimitation surface is offset inwards, that is to say in the direction of the at least one optical sensor.
  • the distance between the virtual boundary surface and the real or approximately determined boundary surface of the monitoring area is preferably less than 50 mm, preferably less than 10 mm, in particular less than 5 mm.
  • optical sensors arranged at different points can also be provided, with each optical sensor monitoring a monitoring area assigned to it.
  • a volume can be defined in a simple manner, which is then monitored.
  • the safety prism can be formed both by virtual boundary surfaces and by determined real boundary surfaces. While it is advantageous if several virtual boundary surfaces limit the safety prism in order to minimize the susceptibility of the monitoring method to errors, it is of course also conceivable that a safety prism is generated on the basis of a virtual boundary surface and the determined spatial structure.
  • the safety prism is not absolutely necessary for the safety prism to be closed on each side.
  • the safety prism is open on the side on which the at least one optical sensor is arranged.
  • Monitoring area is cuboid, such as in an elevator car with a rectangular floor plan, according to a further embodiment of the invention it is provided that the safety prism is cuboid and the virtual boundary surfaces at least partially define a lateral surface of the cuboid safety prism.
  • the safety prism in the present exemplary embodiment is a safety cuboid.
  • the monitoring area does not have to be limited to the interior of the elevator car, but can also include other areas of the elevator car or consist of other areas of the elevator car.
  • a preferred embodiment variant of the method according to the invention provides that the monitoring area is an interior area of the elevator car comprises, wherein the spatial structure of the inner region of the elevator car comprises at least two side surfaces as well as a floor surface and / or a ceiling surface, wherein at least one virtual boundary surface corresponds to one of the side surfaces.
  • a, in particular cuboid, safety prism is created based on the spatial structure of the interior of the elevator car, the virtual boundary surfaces corresponding to the side surfaces defining part of the outer surface, preferably the entire outer surface, of the safety prism.
  • a further embodiment provides that for at least approximate determination of the spatial structure in the evaluation device from the image data and the floor area or the ceiling area is first determined from the position data and the respective adjacent side areas are determined on the basis of the floor area or the ceiling area. Since the floor or ceiling surface is only rarely designed in such a way that optical effects develop on it, these surfaces are particularly suitable as a basis for determining an initial surface of the spatial structure. Using the position data, the edges of the subsequent side surfaces can then be easily determined, from which the spatial position and orientation of the side surfaces can then be easily determined. Based on this determined information, in the next step the at least one virtual boundary surface can be generated in a simple manner.
  • Monitoring can be advantageous, especially for maintenance purposes, not only in the elevator car itself, but also for a shaft area above or below the elevator car, for example to determine whether a maintenance worker is in the shaft and the elevator is out of it Reason may not be put into operation.
  • the monitoring area comprises a shaft area above and / or below the elevator car, the spatial structure of the shaft area comprising several shaft walls, with at least one of the virtual boundary surfaces corresponding to one of the shaft walls. Since, under certain circumstances, the shaft bottom or the shaft ceiling cannot be detected, it is conceivable when monitoring the shaft area that a horizontal virtual boundary surface forms the top or bottom of a corresponding safety prism.
  • a further embodiment variant of the invention provides that the monitoring area comprises a door area of the elevator car, the spatial structure of the door area comprising a door opening that can be closed by means of an elevator door, with a security prism corresponding to the door opening being generated. It is particularly advantageous if the monitoring of the safety prism is combined with object recognition, for example to detect objects that require the elevator door to be open for a longer period of time, such as elderly and / or disabled people or longer objects such as ambulance beds.
  • the at least one optical sensor also records position data, it is possible in a particularly simple manner to determine the relative distance between two detected surfaces.
  • the parking accuracy of the elevator car can also be checked if - as soon as the The elevator door opens or is open - a floor area of a landing point of the elevator is also covered by the monitoring area. An offset between a floor area of the elevator car and the corresponding landing point can thus be determined by determining the relative distance from the corresponding position data.
  • a further embodiment of the method according to the invention provides that the monitoring area comprises a floor area of a landing point in an open position of the elevator door, with a relative distance between the floor area of the landing point and a floor surface of the safety prism corresponding to the door opening being determined from the recorded position data.
  • the readjustment accuracy of the elevator car can also be checked, i.e. the offset between the elevator car and the landing point that results from the entry or exit of objects, in particular people, during operation.
  • Adjustment accuracy can also be reacted immediately to incorrect parking of the elevator car via the continuous monitoring of the distance, in that a corresponding emergency procedure is triggered if the measured distance exceeds a predetermined tolerance range.
  • Such emergency procedures can represent, for example, the sending of a maintenance or malfunction message, a warning to the passengers or the decommissioning of the elevator. Therefore, according to a further embodiment of the invention, it is provided that an emergency procedure is triggered if the determined relative distance lies outside a predefined tolerance range.
  • the tolerance range for the measured relative distance in connection with the positioning accuracy is usually +/- 10 mm, while the tolerance range for the measured relative distance in connection with the readjustment accuracy is usually +/- 20 mm.
  • the monitored monitoring area has different sections, for example it comprises door area, interior area and shaft area, it is not absolutely necessary that all sections or partial areas are constantly monitored. This applies regardless of whether a single optical sensor is designed to monitor several sub-areas or whether several optical sensors are provided which are each assigned to a sub-area of the monitored area.
  • different sections of the monitoring area are recorded and monitored as a function of an elevator condition detected in the evaluation device.
  • the evaluation device can be connected, for example, to an elevator control in order to obtain information about the door opening, the floor approached or the like, for example.
  • sensors can be connected to the evaluation device or an algorithm stored in the evaluation device can use the image data and possibly the position data to detect elevator statuses, such as opening and closing the elevator doors or the entry or exit of people or objects, for example to avoid empty runs to detect.
  • elevator statuses such as opening and closing the elevator doors or the entry or exit of people or objects, for example to avoid empty runs to detect.
  • a corresponding section of the monitoring area can be monitored more intensively or exclusively.
  • a safety prism arranged in a door area of the elevator car is monitored, and / or that when an elevator status "normal travel” is detected, a safety prism arranged in an interior of the elevator car is monitored, and / or that when an elevator status “maintenance run” is detected, a safety prism arranged in a shaft area above and / or below the elevator car is monitored.
  • the preferably cuboid-shaped safety prism generated in the area of the door opening can be particularly monitored in order to be able to determine entrances to the elevator car and / or exits from the elevator car.
  • This state is usually detected when the elevator door opens or closes or when the elevator door is open Objects, people or objects can also be detected in this state, which block the door area and thus prevent the elevator door from closing.
  • the preferably cuboid security prism generated in the interior of the elevator car can be specially monitored, for example, in order to identify emergencies such as unconscious people or criminal processes or to identify objects that have been left behind Usually detected when the elevator door is closed and variable objects, such as people or objects that do not belong to the inventory, are recognized in the elevator car.
  • the maintenance worker in the shaft can be protected by preventing further journeys. It is also possible to determine whether the maintenance worker fainted due to an accident at work and needs help.
  • the focus area of the optical sensor is movable and can be influenced by the evaluation device.
  • the focus of the section of the monitored area detected by the optical sensor can be adjusted to the detected elevator condition, so that the optical sensor focuses on the area that requires special attention due to the detected elevator condition. is focused.
  • the at least one optical sensor is designed to be pivotable and the evaluation device controls the at least one optical sensor in order to detect the corresponding section of the monitoring area.
  • the at least one optical sensor can be arranged in the door area, for example in the door frame, in order to be able to monitor the door area particularly efficiently in the elevator state "door opening", but can be swiveled in the direction of the interior area during normal travel in order to monitor the passengers there to take over, since the door area is not critical in this elevator state.
  • an optical sensor arranged in the car ceiling which is provided in particular for monitoring the interior area, is pivoted in the direction of the elevator shaft in the elevator state "maintenance work" Monitor the shaft area.
  • the captured image data and the correlating position data are used in the evaluation device not only to generate the at least one virtual boundary surface or, preferably cuboid, safety prisms, but also to detect objects such as people or objects that are located within the virtual boundary surface or within the safety prism.
  • An object recognition algorithm known per se, as described, for example, in WO 2019/076917 A1, can be used for this purpose.
  • the object recognition can also - as indicated above - be used for the detection of elevator conditions. Therefore, according to a further embodiment variant of the invention, it is provided that persons and / or objects are recorded and monitored via the recorded image data and position data by means of an object recognition algorithm stored in the evaluation device.
  • the evaluation device communicates with at least one server via at least one first communication network, with captured sensor data and / or event identification messages being transmitted from the evaluation device to the server.
  • the recorded sensor data can be collected and processed centrally on the server.
  • security-relevant events for example using the method described in WO 2019/076916 A1, can be detected and corresponding event identification messages can be generated, with corresponding alarm procedures being triggered on the server.
  • the invention also relates to a system for monitoring an elevator car
  • At least one optical sensor which is designed to acquire image data and position data correlating with the image data
  • evaluation device which evaluation device is connected to the at least one optical sensor by means of a first data connection.
  • the evaluation device is designed to carry out the method according to the invention described above.
  • Such a modular system can also easily be subsequently integrated into an existing elevator system, since only the evaluation device and the at least one additional sensor have to be integrated into the elevator car.
  • Depth cameras, 3D cameras for example based on time-of-light [TOF] sensors, also called photonic mixer [PMD] sensors, stereographic cameras or plenoptic cameras are particularly suitable as optical sensors that can capture image data and correlating position data.
  • An optical sensor or several, for example two, three or more than three, optical sensors can be attached at different points in the elevator car in order to to enable appropriate monitoring of several sections of the monitoring area.
  • the evaluation device usually comprises at least one memory unit in which the necessary algorithms, such as the algorithm for generating virtual boundary surfaces and possibly an object recognition algorithm, are stored, and a processor unit in which the algorithms are executed and the image data and position data are evaluated become. It is advantageous if the evaluation device also comprises a communication device for communication with at least one server via a first communication network, so that data can be transmitted between the server and the evaluation device.
  • the invention also relates to elevator cars in which the aforementioned system is installed.
  • an optical sensor which is designed to detect image data and position data correlating with the image data, is arranged in an interior area of the elevator car in order to monitor at least the interior area.
  • the corresponding optical sensor can for example be attached to a side wall of the elevator car, to the ceiling of the elevator car or to the roof of the elevator car, an attachment in the door area with a view towards the interior area is also conceivable.
  • an optical sensor which is designed to capture image data and position data correlating with the image data, is arranged in a door area of the elevator car in order to close at least the door area monitor.
  • the corresponding optical sensor can be attached, for example, in the door itself, for example in the door frame, or on the ceiling with a view in the direction of the door opening.
  • an optical sensor which is designed to capture image data and position data correlating with the image data, is arranged on an upper side or an underside of the elevator car in order to at least monitor a shaft area above or below the elevator car.
  • the corresponding sensor can be attached, for example, on the roof of the elevator car or on the underside of the elevator car, whereby it is also conceivable that the optical sensor is spaced apart from the roof or floor of the elevator car by means of a mounting device.
  • a further variant of the elevator car provides that the optical sensor is designed to be pivotable and a pivoting movement of the optical sensor can be controlled by the evaluation device in order to be able to monitor at least two different areas of the elevator car by means of the evaluation device through the pivoting movement.
  • the focus of the monitoring can be achieved by pivoting the camera from one section of the monitoring area, for example the door area, to another section of the monitoring area, for example the interior area.
  • the optical sensor can be designed to be pivotable either about one or about two or more axes.
  • a further variant of the elevator car provides that the optical sensor interacts with at least one optical aid arranged in the elevator car, the optical sensor and the optical aid being arranged in such a way that at least a portion of the monitoring area is removed from the optical sensor only by interacting with the optical Aid is detectable.
  • optical aids such as mirrors, in particular parabolic mirrors, or reflector systems, which for example can comprise a plurality of optical elements, such as mirrors or lenses, in particular periscope-like reflector systems, can be used as optical aids.
  • the use of waveguides, such as glass fiber cables or glass fiber bundles, is also conceivable as optical aids. Due to the interaction of the optical sensor and optical aids, the
  • Monitoring area also include sections that would otherwise not be physically detectable by the optical sensor.
  • the optical sensor can be attached to the roof of the elevator car to prevent vandalism or to reduce the subjective feeling of surveillance of the passengers, and one of the optical aids described above can be provided to enable detection of the interior and / or the door area.
  • this can also apply, for example, to an optical sensor arranged in the interior area, which can detect the shaft area using the optical aids listed above.
  • this embodiment variant can also be combined with a pivotable optical sensor, whereby, for example, several optical aids can be provided, whereby, depending on the orientation of the optical sensor, it is possible to detect a different section of the monitored area.
  • the enlargement of the monitored area detected by means of the optical sensor, achieved by the optical aids interacts synergistically with the improved detection due to the generation of at least one virtual boundary surface.
  • the proposed optical aids achieve advantageous effects even without generating at least one virtual boundary surface.
  • Fig. 1 is a schematic representation of a
  • Elevator car with an optical sensor and an evaluation device
  • 3a, 3b show a schematic representation of the elevator car in a shaft area before and after the generation of virtual boundary surfaces
  • 4a, 4b, 4c show a door area of the elevator car before and after the generation of a safety prism; 5 shows a section of the door area of an elevator car located in a landing point with the elevator door open;
  • FIG. 6 shows an elevator car with an optical sensor and an optical aid
  • FIG. 1 shows an elevator car 1 of an elevator installation which is located in an elevator shaft 2.
  • the vertical movement of the elevator car 1 takes place by means of a support cable 17 which is connected to a drive unit and which cooperates with a counterweight 18.
  • a door opening 8 of the elevator car 1 is closed by means of an elevator door 9, which elevator door 9 can open at at least two vertically offset landing points 13 of the elevator in order to enable objects, in particular people and objects, to enter and exit.
  • Each landing point 13 is generally assigned to a floor of the building on which the elevator is operated.
  • the elevator car 1 When the elevator car 1 enters the respective landing point 13, the elevator car 1 is parked in normal operation so that a floor surface 13a of the landing point 13 is level with a floor surface 7b of the elevator car 1.
  • an optical sensor 3 is attached to a side wall 7a of the elevator car 1 and is connected to an evaluation device 4 via a data link.
  • the optical sensor 3 and the evaluation device 4 are installed in a monitoring device 16, which can include further elements, such as a display unit, an intercom unit or a communication unit.
  • the evaluation device 4 can also be installed in the elevator car 1 outside the field of view of the passengers, for example on the top or bottom of the elevator car 1 or in a casing.
  • the optical sensor 3 can also be attached to different positions of the elevator car 10, as will be shown by way of example below, also separately from the evaluation device 4.
  • optical sensors 3 can interact with one evaluation device 4.
  • the optical sensor 3 is designed to acquire image data and position data correlating with the image data in a monitoring area.
  • 3D cameras or depth cameras are used as optical sensors 3, which can record image data and distance data from objects located in the monitoring area. These data are then evaluated in the evaluation device 4 by means of a stored algorithm in order to detect objects in the monitoring area and subsequently monitor or track them.
  • the algorithm can also include steps by means of which concealed objects are identified and it is checked whether the concealed objects also leave the elevator car 1. By monitoring the interior 10 of the elevator car 1, for example emergencies, such as unconscious people, or security-relevant events, such as vandalism or other criminal activities, can be detected and appropriate alarm steps can then be set.
  • Evaluation device 4 designed to carry out the method steps discussed below on the basis of several examples.
  • FIGS. 2a and 2b show a schematic representation of an interior area 10 of the elevator car 1.
  • the spatial structure is in each case indicated by corresponding Boundary elements 7 are defined, in the present case by several, usually a total of four, side surfaces 7a, a floor surface 7b and a ceiling surface 7c.
  • One of the side surfaces 7a has the door opening 8 and the elevator door 9 which closes the door opening 8.
  • the optical sensor 3 is attached centrally to the ceiling surface 7c.
  • both the position and the spatial orientation of the side surfaces 7a and the bottom surface 7b can be approximated by the evaluation device 4 to such an extent that the inner region 10 is sufficiently determined.
  • the horizontal bottom surface 7b can first be identified and, proceeding from the bottom surface 7b, the edges formed by the side walls 7a adjoining the bottom surface 7a can be identified.
  • the spatial structure of the inner region 10 can now be grasped in a simple manner or at least approximated with sufficient accuracy.
  • the evaluation device 4 In a next step, which is shown schematically in FIGS. 2c and 2d, the evaluation device 4 generates at least one virtual boundary surface 5 (shown in dashed lines), which in sections corresponds to the spatial structure.
  • the section-wise corresponding to the spatial structure means that the virtual boundary surfaces essentially correspond to the spatial position and orientation of the side surfaces 7a, but are slightly offset in the direction of the optical sensor 3 with respect to the side surfaces 7a. While it is basically conceivable that only one of the side surfaces 7a and / or bottom surface 7b or ceiling surface 7c is replaced by a virtual boundary surface 5, it is advantageous if several virtual boundary surfaces 5 are generated.
  • a virtual safety prism 6 is generated in the evaluation device 4 from the virtual boundary surfaces 5 and possibly the real boundary surfaces 7a, 7b, 7c.
  • a cuboid safety prism 6 is shown as an example in FIG. 2e, the outer surface of which is formed by the virtual boundary surfaces 6 and one of the base surfaces of which is formed by the real bottom surface 7a.
  • the evaluation device 4 only takes into account those image data whose correlating position data lie within the safety prism 6. In other words, those image data whose correlating position data lie outside the safety prism 6 or lie on the sides of the virtual boundary surfaces 5 facing away from the optical sensor 3 are not recorded and are not used for object recognition. Since the real side walls 7a, on which reflections can form, lie outside the virtual boundary surfaces 5 or outside the defined safety prism 6, objects or reflections located there are no longer detected by the evaluation device 4 and can therefore no longer be used to falsely detect Objects.
  • FIGS. 3a and 3b show the principle described above in a different application area, however, since the optical sensors 3 shown in the present exemplary embodiment do not monitor the interior area 10, but rather a shaft area 12 located above or below the elevator car 1.
  • An optical sensor 3 is arranged on the underside of the elevator car 1 and on the upper side of the elevator car 1. In this case, the shaft walls 7d of the elevator shaft 2 form the
  • Boundary element 7 Exactly as described above, in a first step the spatial structure of the shaft area 12 is at least approximately determined and is subsequently at least one virtual boundary surface 5 is generated, which here corresponds to one of the shaft walls 7d.
  • the four virtual boundary walls 5 in turn define a lateral surface of a cuboid safety prism 6, which is then monitored.
  • Such a procedure is particularly advantageous in elevators in which the shaft walls 7d consist at least in sections of glass. It goes without saying that only the upper or lower shaft area 12 can be monitored by means of an optical sensor 3.
  • FIGS. 4a to 4c The same principle for monitoring a door area 11 of the elevator car 1 is illustrated in FIGS. 4a to 4c.
  • 4a shows the door area 11 in a top view with the elevator door 9 closed, that is to say when the door opening 8 is blocked by the elevator door 9. If the elevator door 9 opens or the elevator door 9 is completely open, the spatial structure of the door opening 8 is determined at least approximately by the optical sensor 3 attached above the door opening 8 (see FIG. 4c) and virtual boundary surfaces 5 are then generated which limit a safety prism 6 in the door opening 5. In this way, the entry and exit of objects can be detected particularly easily. Furthermore, it can be provided that the evaluation device 4 is connected to the control of the elevator door 9 and, for example, prevents the elevator door 9 from closing if an object is detected in the corresponding safety prism 6.
  • FIG. 5 a section of the door area 11 of the elevator car 1 is shown, the elevator car 1 being located in a landing point 13 and the elevator door 9 being open.
  • the corresponding safety prism 6 is shown symbolically.
  • the problem of the accuracy of parking or readjustment of the elevator car 1, which can change in the course of the operating life of the elevator system, can be seen in detail. While in an optimal state the relative distance d between the floor surface 7a of the elevator car 1, which in the present case Embodiment also the bottom surface of the
  • Safety prism 6 corresponds, and the bottom surface 13a of the landing site 13 cannot be perceived.
  • the greater the distance d the poorer the shutdown or readjustment accuracy. If the distance d is outside a tolerance range, preferably 0 mm +/- 10 mm for the parking accuracy or 0 mm +/- 20 mm for the readjustment accuracy, the elevator must be readjusted, usually by a maintenance worker.
  • the optical sensor 3 which also records position data, the distance d can be determined in a simple manner by means of the evaluation device 4, for example if the optical sensor 3 (as shown in FIG. 4c) is attached above the door area 11.
  • the evaluation device 4 further comprises a communication unit by means of which a server can be contacted, an emergency procedure, for example the transmission of an error message and / or the generation of a maintenance order, can take place when the tolerance range is exceeded by the determined distance d. If the evaluation device 4 is connected to a control unit of the elevator, the elevator can be temporarily shut down as soon as all persons have left the elevator car 1.
  • FIG. 6 shows one way in which the optical sensor 3 can detect a monitoring area which is not directly in the detection area of the optical sensor 3.
  • an optical aid 15 is arranged in the beam path of the optical sensor 3; in the simplest example, the optical aid 15 is a mirror, which redirects the beam path into the interior area 10 or to the door area 11, while the optical sensor 3 is located on the top, i.e. on the roof, of the elevator car 1. It goes without saying that a large number of other optical aids 15 are conceivable which have such a functionality, such as parabolic mirrors, periscope-like mirror systems or glass fiber bundles in which the optical signals are transported.
  • FIGS. 7a and 7b a further variant for adapting the detection range of the optical sensor 3 to the respective situation-related requirements is shown.
  • the optical sensor 3 can be pivoted by means of a pivot mechanism 14.
  • the optical sensor 3 can be aligned in a first position (see FIG. 7a) of the pivoting mechanism 14 for the specific detection of the door area 11 and in a second position (see FIG. 7b) for the specific detection of the interior area 10.
  • the pivotability of the optical sensor 3 and / or the presence of at least one optical aid 15 is particularly advantageous if the evaluation device 4 can detect an elevator condition, such as a normal journey with people and / or objects in the interior, a door opening, i.e. the period from Beginning of the opening movement of the elevator door 9 via the entry and exit of people and / or objects until the end of the closing movement of the elevator door 9, or maintenance work.
  • the focus of the optical sensor 3 can be directed to the corresponding sub-area of the monitoring area depending on the detected elevator condition. It is advantageous, for example, if the optical sensor 3 is directed at the door area 11 by means of the swivel mechanism 14 if the elevator status of the door opening has been detected (see FIG. 7a), and if the optical sensor 3 is aimed at the interior area 10 by means of the swivel mechanism 14 if the elevator status normal travel was detected.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)

Abstract

L'invention concerne un procédé de surveillance d'une cabine d'ascenseur (1) au moyen d'au moins un capteur optique (3), ledit au moins un capteur optique (3) détectant des données d'image et des données de position en corrélation avec les données d'image dans une zone de surveillance de la cabine d'ascenseur (1), les données d'image et les données de position étant transmises au moyen d'une première liaison de données à un dispositif d'évaluation situé dans la cabine d'ascenseur (1). Selon l'invention, pour permettre une surveillance fiable de la zone de surveillance et pour rendre la surveillance insensible à tout effet optique qui peut se produire au niveau des surfaces des faces limites (7a, 7b, 7c), une structure tridimensionnelle de la zone de surveillance est au moins approximativement déterminée à partir des données d'image et des données de position transmises dans le dispositif d'évaluation, et au moins une face limite virtuelle (5) est générée, qui correspond au moins par endroits à la structure tridimensionnelle de la zone de surveillance, la surveillance étant uniquement basée sur des données d'image dont les données de position corrélées se trouvent sur un côté de l'au moins une face limite virtuelle (5) faisant face à au moins un capteur optique (3).
EP20796500.5A 2019-10-14 2020-10-14 Procédé de surveillance d'une cabine d'ascenseur Pending EP4045450A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50878/2019A AT523031A1 (de) 2019-10-14 2019-10-14 Verfahren zur überwachung einer aufzugskabine
PCT/EP2020/078962 WO2021074252A1 (fr) 2019-10-14 2020-10-14 Procédé de surveillance d'une cabine d'ascenseur

Publications (1)

Publication Number Publication Date
EP4045450A1 true EP4045450A1 (fr) 2022-08-24

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EP20796500.5A Pending EP4045450A1 (fr) 2019-10-14 2020-10-14 Procédé de surveillance d'une cabine d'ascenseur

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EP (1) EP4045450A1 (fr)
AT (1) AT523031A1 (fr)
WO (1) WO2021074252A1 (fr)

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CN114419451B (zh) * 2022-03-29 2022-06-03 北京云迹科技股份有限公司 电梯内外识别方法、装置、电子设备及存储介质
DE102022108005A1 (de) 2022-04-04 2023-10-05 Kurt Sengmüller Gefahrenerkennungssystem für eine Aufzugsanlage, Türanordnung, Zugangsportal und Aufzugsanlage

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FI117010B (fi) * 2004-11-01 2006-05-15 Kone Corp Hissin kauko-ohjaus
JP5877135B2 (ja) * 2012-07-20 2016-03-02 株式会社日立製作所 画像認識装置及びエレベータ装置
CN106144816B (zh) * 2015-04-03 2019-11-12 奥的斯电梯公司 基于深度传感器的乘客检测
ES2897749T3 (es) * 2016-05-04 2022-03-02 Kone Corp Sistema y método para mejorar el posicionamiento de un ascensor
AT520567B1 (de) * 2017-10-17 2021-10-15 View Promotion Gmbh Verfahren zur Überwachung einer Aufzugskabine

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