HK40109701A - An elevator system - Google Patents

Description

elevator system

Technical Field

This application relates to the field of elevator systems.

Background Technology

Elevators in an elevator system can be used to transport different types of loads. Typical loads include one or more passengers traveling to one or more floors. Besides human passengers, elevators can also be used to transport a variety of objects that can be very heavy. For example, a single object to be transported by elevator might weigh hundreds of kilograms or even more. When the object is subsequently pushed into the elevator car, the sudden change in weight experienced by the elevator car can cause it to sink slightly in the elevator shaft. In other words, the elevator car's floor level will be lower than the building's floor level. This can be problematic, for example, when an object is carried by a trolley, and when the trolley's front wheels land on the elevator car floor, the elevator car moves downwards in the elevator shaft due to the sudden, significant increase in load. If the person carrying the trolley then, for example, changes his/her mind and tries to back away from the elevator car, this may no longer be possible because there is a significant threshold between the elevator car and the building floor.

Therefore, a solution that mitigates at least one of these drawbacks would be beneficial.

Summary of the Invention

According to one aspect, an elevator system is provided. The elevator system includes means for obtaining an indication of a heavy object to be transported by the elevator system, means for allocating an elevator car to transport the heavy object based on the indication, and means for activating at least one preemptive action associated with the allocated elevator car in response to the indication in an adjustment mode, wherein the adjustment mode is configured to substantially maintain the vertical position of the elevator car in the elevator shaft when the heavy object is loaded into the elevator car.

In one implementation, at least one pre-action includes the activation of the ratchet device.

In one implementation, the adjustment mode includes a precision mode, wherein in the precision mode, the device for activation is configured to, as at least one preemptive action, set torque for the motor associated with the elevator car to keep the elevator car in the proper position in the elevator shaft when the load carried by the elevator car changes, at least partially open the mechanical brake, and use the motor to maintain the position of the elevator car in the elevator shaft based on information from at least one sensor.

In one embodiment, the at least one sensor includes at least one of a position sensor, a strain sensor, a torque sensor, and a load sensor.

In one embodiment, the device for obtaining an indication of the weight is configured to obtain the indication from a system outside the elevator system.

In one embodiment, the device for obtaining the object includes a sensor system configured to acquire image data provided by at least one camera and process the image data to identify the heavy object.

In one implementation, the sensor system is configured to identify heavy objects by recognizing identifiers associated with the objects from image data.

In one implementation, the elevator system includes at least one camera.

In one embodiment, the at least one camera includes a camera configured in at least one of the following: a car control panel, a car display, an elevator signaling device, an information display, a destination control panel, and a floor display.

In one implementation, the sensor system and at least one camera are arranged in a single communication segment of the elevator system.

In one implementation, the sensor system includes multiple analysis units configured at different locations within the elevator system.

In one implementation, the analysis units and at least one camera are arranged in a single communication segment of the elevator system.

In one embodiment, the device for obtaining an indication of the weight is configured to obtain the indication together with an elevator call.

In the implementation method, the indication includes the mass of the object.

In one embodiment, the device for obtaining an indication of the weight is configured to obtain the indication via radio frequency transmission.

Attached Figure Description

The accompanying drawings, which are included to provide a further understanding of the invention and form part of this specification, illustrate embodiments of the invention and, together with the description, help to explain the principles of the invention.

In the picture:

Figure 1A illustrates an elevator system according to an exemplary embodiment.

Figure 1B illustrates an elevator system according to another exemplary embodiment.

Figure 2 illustrates an elevator communication system according to an exemplary embodiment.

Figure 3A illustrates an elevator lobby layout according to an exemplary embodiment.

Figure 3B illustrates an elevator lobby layout according to an exemplary embodiment.

Detailed Implementation

The following description illustrates an elevator system configured to adjust the operation of an elevator car in response to receiving an instruction to transport a heavy object by the elevator. The elevator system is configured to activate at least one preemptive action associated with the elevator car in an adjustment mode in response to the instruction, wherein the adjustment mode is configured to substantially maintain the vertical position of the elevator car in the elevator shaft when the heavy object is loaded into the elevator car. Therefore, the elevator system includes means for receiving an instruction to transport a heavy object by the elevator system, means for allocating an elevator car for transporting the heavy object, and means for activating at least one preemptive action associated with the allocated elevator car in an adjustment mode in response to the instruction, wherein the adjustment mode is configured to substantially maintain the vertical position of the elevator car in the elevator shaft when the heavy object is loaded into the elevator car. The illustrated solution enables, for example, the elevator system to maintain a substantially constant position of the elevator car in the elevator shaft even when the heavy object is loaded into the elevator car.

In exemplary embodiments, the various implementations discussed herein can be used in elevator systems that include elevators adapted for and usable for transferring passengers and other objects between floors of a building in response to a service request.

Figure 1A illustrates an elevator system according to an exemplary embodiment.

The elevator system may include one or more elevator cars having at least one associated elevator controller 102. The elevator system may also include a group controller 100 configured to provide control of the elevator cars at a group level. The elevator controller 102 is connected to a drive 104, which controls a motor to move the elevator cars within the elevator shaft. A sensor system 106 may be connected to at least one of the group controller 100 and the elevator controller 102. One or more sensors 108 (e.g., cameras) may be part of or separate from the sensor system 106.

The connections between the various components of an elevator system can be direct or indirect. Indirect connections can refer to solutions where, for example, an elevator communication system can be used to transmit information about the elevator system, and data communication can be achieved using different types of communication buses and other network components (e.g., point-to-point Ethernet buses, multipoint Ethernet buses, and switches). Therefore, indirect connections can mean that components can be communicatively connected to each other.

The elevator system includes means for obtaining an indication of a heavy object to be transported by the elevator system, means for allocating an elevator car to transport the heavy object, and means for activating at least one preemptive action associated with the allocated elevator car in an adjustment mode in response to the indication, wherein the adjustment mode is configured to substantially maintain the vertical position of the elevator car in the elevator shaft when the heavy object is loaded into the elevator car. The solution shown allows the elevator system to maintain a substantially constant position of the elevator car in the elevator shaft, for example, even when the heavy object is loaded into the elevator car.

In an example embodiment, sensor system 106 can act as a device for obtaining indication and is configured to identify heavy objects based on image data from at least one camera 108. Therefore, identification can be based on, for example, an image recognition system or a machine vision system. Sensor system 106 can identify an object as “heavy”, for example, based on the object’s size. In another example embodiment, the sensor system can identify identifiers, such as text, object identifiers, QR codes, or barcodes, from the image data and then obtain additional information about the object’s weight based on these identifiers.

In an example embodiment, sensor system 106 may include one or more elements configured to receive and/or transmit radio frequency (RF) based data. Thus, an object may include, for example, an RFID tag, which then wirelessly communicates with sensor system 106 to enable identification of the object as heavy.

When the presence of a (potentially) heavy object has been identified, the group controller 100 can act as a device for allocating elevator cars. Therefore, when there is more than one elevator in the elevator system, the group controller 100 can first be configured to select a suitable elevator for the object and then assign an elevator call to the selected elevator. If the elevator system includes only one elevator car, a separate group controller may not be necessary, and the allocation can be performed, for example, by the elevator controller 102. Because the group controller 100 knows the overall traffic situation of the elevators and whether the elevators have different transport capacities, the group controller 100 is able to allocate elevator cars suitable for transporting heavy objects.

When an elevator car has been assigned, the elevator system can activate at least one preemptive action associated with the assigned elevator car in adjustment mode in response to the instruction. In adjustment mode, the elevator system can be configured to maintain the elevator car in a vertical position in the elevator shaft when a heavy load is loaded into the elevator car. In other words, even if the load experienced by the elevator car increases, the elevator car will not slide vertically downwards in the elevator shaft due to the increased weight. In an exemplary embodiment, the elevator controller 102 or the drive 104 can act as a device for activating at least one preemptive action associated with the assigned elevator car in adjustment mode in response to the instruction.

In an exemplary embodiment, at least one camera 108 may include a camera configured in at least one of the following: a car control panel, a car display, an elevator signaling device, an information display, a destination control panel, and a floor display.

Figure 1B illustrates an elevator system according to another exemplary embodiment.

The elevator system shown in Figure 1B differs from that shown in Figure 1A in that, in the elevator system of Figure 1B, the group controller 100 can be configured to receive indications from an external sensor system 110 regarding the heavy object to be transported by the elevator system. The external sensor system 110 may not be part of the elevator system itself but is connected to the elevator system via an application programming interface (API) or any other interface. Sensor or image data may have already been acquired by the external sensor system 110, and it can process the data to identify the heavy object. The group controller 100 can then simply receive the indication of the heavy object. In the example embodiment, some additional information, such as information related to the size and/or weight of the object, may be received from the external sensor system 110.

In an exemplary embodiment, the device for obtaining an indication of a heavy object can be configured to obtain the indication along with an elevator call. For example, when a passenger intending to bring a heavy object into the elevator car makes an elevator call, the passenger can use a special "heavy object call" and provide additional indication of the heavy object when making the elevator call, for example, using a destination operation panel (DOP).

In the exemplary embodiments of Figure 1A or Figure 1B, at least one preemptive action may include the activation of a ratchet device. The ratchet device is a safety device, and its primary function is, for example, to prevent an elevator from falling when triggered in an emergency. In the disclosed solutions, the ratchet device can be used to provide a similar end result in heavy-load implementations.

In the example embodiments of Figure 1A or 1B, the adjustment mode may include a precision mode, in which the device for activation is configured, as at least one preemptive action, to set torque for the motor associated with the elevator car to hold the elevator car in the proper position in the elevator shaft, at least partially disengaging the mechanical brake, and using the motor to maintain the position of the elevator car in the elevator shaft based on information from at least one sensor when the load carried by the elevator car changes. This information may be provided, for example, by at least one of a position sensor, a strain sensor, a torque sensor, and a load sensor. In other words, the motor associated with the elevator car is operated such that the elevator car maintains its position in the elevator shaft regardless of an increase in the weight carried by the elevator car. In another exemplary embodiment, the elevator system may be configured to use the motor to maintain the position of the elevator car in the elevator shaft based on the torque required as seen by the motor. For example, if the torque required to maintain the motor shaft angle increases, the motor shaft may rotate, thereby reducing the rope length between the motor and the elevator car. And, if the torque required to maintain the motor shaft angle decreases, the motor shaft may rotate, thereby increasing the rope length between the motor and the elevator car.

Figure 2 illustrates an elevator communication system according to an exemplary embodiment of an elevator system. The elevator communication system may include elements similar to those shown in Figures 1A and 1B. The elevator communication system includes an elevator controller 200 connected to a group controller 204. The elevator communication system may also include one or more multipoint Ethernet bus segments 208A, 208B, 208C, 224A, 224B, 224C, 228A, 228B, 228C reachable from the elevator controller 200, and multiple elevator system sections configured to communicate via the multipoint Ethernet bus segments 208A, 208B, 208C, 224A, 224B, 224C, 228A, 228B, 228C. Points 206A-206F, 220A-220F, 222A-222F, and 226A-226C are provided, wherein the elevator controller 200 can be reached from the elevator system nodes 206A-206F, 220A-220F, 222A-222F, and 226A-226C via multipoint Ethernet bus segments 208A, 208B, 208C, 224A, 224B, 224C, 228A, 228B, and 228C.

In an exemplary embodiment, the elevator communication system may include a point-to-point Ethernet bus 210 and at least one connection unit 202A, 202B, 202C. The connection units 202A, 202B, 202C include a first port connected to multipoint Ethernet bus segments 208A, 208B, 208C and a second port connected to the point-to-point Ethernet bus 210. Therefore, by using the connection units 202A, 202B, 202C, one or more multipoint Ethernet bus segments 208A, 208B, 208C can be connected to the point-to-point Ethernet bus 210. The connection units 202A, 202B, 202C may refer to, for example, a switch, hub, or router. Furthermore, the point-to-point Ethernet bus 210 may be connected to an elevator controller 200. The point-to-point Ethernet bus 210 may be, for example, a 100BASE-TX or 10BaseT11 point-to-point Ethernet bus. Multipoint Ethernet bus segments 208A, 208B, and 208C may include, for example, a 10BASE-T1S multipoint Ethernet bus.

In an exemplary embodiment, elevator system nodes 220A-220F and 222A-228C can be configured to connect to at least one interface of elevator firmware, elevator sensors, elevator safety devices, and elevator control devices. Furthermore, in an exemplary embodiment, the same cables can be used to supply power to the nodes.

The elevator communication system may include an elevator safety controller. The elevator safety controller may be connected to a point-to-point Ethernet bus 210 via a connection unit. This means that elevator system nodes 206A-206F, 220A-220F, 222A-222F, and 226A-226C may send information to the elevator safety controller via the common point-to-point Ethernet bus 210, and vice versa. For example, elevator system nodes 206A-206F, 220A-220F, 222A-222F, and 226A-226C may send information to or receive information from the elevator controller 200 or elevator safety controller 204, for example, from sensors or firmware, to control, for example, actuator configuration firmware. At least some of the elevator system nodes 206A-206F, 220A-220F, 222A-222F, and 226A-226C may be safety nodes according to IEC 61508 SIL Level 3, having a safety processing unit and a separate communication controller. Data from the safety processing unit can be sent only to the elevator safety controller. Safety nodes can be configured to interface with elevator safety equipment, such as safety sensors or safety contacts indicating elevator safety, including landing door contacts, door lock contacts, overspeed regulator contacts, and buffer contacts. Safety nodes can be configured to communicate with the elevator safety controller. To establish safe communication, various types of data checks can be used in the communication, such as checksums, error detection and/or correction algorithms.

The elevator communication system may also include an elevator drive 230 connected to the elevator controller 200. Furthermore, the elevator communication system may include a network interface unit communicatively connected to the elevator controller 200, which enables connection to an external communication network. The network interface unit may include, for example, a router or gateway.

The elevator communication system may also include a point-to-point Ethernet bus 222, which provides connectivity to the elevator car 216 and various components associated with the elevator car 216. The elevator car 216 may include a connection unit 202D, such as a switch, to which one or more elevator car nodes 226A, 226B, 226C may be connected. In an exemplary embodiment, elevator car nodes 226A, 226B, 226C may be connected to the connection unit 202D via a multipoint Ethernet bus segment 208C, thereby forming an elevator car segment. In an exemplary embodiment, the point-to-point Ethernet bus 222 is located in the travel cable of the elevator car 216.

Communication within an elevator communication system can be achieved using at least one point-to-point Ethernet bus and at least one multipoint Ethernet bus segment, forming various segments within the system. For example, elevator system nodes 220A and 220B can form the first floor segment 224A, elevator system nodes 220C and 220D can form the second floor segment 224B, elevator system nodes 220D and 220F can form the third floor segment 224C, hoistway nodes 206A, 206B, and 206C can form the first hoistway segment 208A, hoistway nodes 206D, 206E, and 206F can form the second hoistway segment 208B, and elevator car nodes 226A, 226B, and 226C can form the elevator car segment 208C. Each of segments 208A, 208B, and 208C can be implemented using a separate multipoint Ethernet bus.

As shown in Figure 2, axis nodes 206A, 206B, and 206C can interconnect the axis segment 208A and the landing segments 224A, 224B, and 224C to which axis nodes 206A, 206B, and 206C are connected. In other words, axis nodes 206A, 206B, and 206C can include or can be used as switches to landing segments 224A, 224B, and 224C. This provides a simple solution for adding new elevator system nodes to the elevator communication system. It also provides a solution where a single elevator system node can act as a switch or repeater to another multipoint Ethernet bus segment, where nearby elevator system components (e.g., one or more call buttons, one or more displays, one or more destination control panels, one or more cameras, voice internal communication devices, etc.) are connected to the other multipoint Ethernet bus segment.

In an exemplary embodiment, sensor system 106 and at least one sensor 108 may be arranged in a single communication segment of the elevator system. Sensor system 106 may be configured to acquire image data provided by at least one camera, process the image data to identify heavy objects, and provide indications to group controller 204. For example, nodes 220A, 220B may include one or more sensors and sensor systems forming landing segment 224A. In another example embodiment, axis node 208A may act as a sensor system. This means that if a camera sends image data to landing segment 224A, the data transmission occurs only within that segment and does not impose any data transmission load on other Ethernet segments.

In an exemplary embodiment, the sensor system 106 may include multiple analysis units configured at different locations or in Ethernet segments within the elevator system. In other words, each segment may include a separate analysis unit configured to analyze image data transmitted within the corresponding segment. The analysis units may be configured to analyze the image data in more detail (e.g., by performing image recognition) to make decisions based on the image data. In other words, the image data can be analyzed locally (i.e., within the segment), and only the results of the analysis can be further forwarded to, for example, the elevator controller. This achieves a solution where data transmission occurs only within the corresponding segment and does not impose any unnecessary image data transmission load on other Ethernet segments.

Figure 3A illustrates an elevator lobby arrangement according to an exemplary embodiment. Figure 3A shows an example associated with a construction environment where an elevator is used to transport a large quantity of heavy cement 308. An elevator controller 300 is configured to control three elevators 302A, 302B, and 302C. Cameras may be integrated into at least one of the destination operation panels 304A, 304B and/or floor displays 306A-306C. The elevator system may be configured to detect heavy objects based on image data from at least one camera, assign elevator 302C, and activate at least one preemptive action associated with the assigned elevator car in the aforementioned adjustment mode. In an exemplary embodiment, the elevator system may be configured to identify heavy objects based on image data from at least one camera. Therefore, identification may be based on, for example, an image recognition system or a machine vision system. The elevator system may identify an object as “heavy” based, for example, on the object’s size. In another exemplary embodiment, the elevator system may be configured to identify identifiers, such as text, object identifiers, QR codes, or barcodes, from the image data, and then obtain additional information about the object’s weight based on those identifiers. In another exemplary embodiment, the elevator system may be configured to receive indication of a heavy object from a system outside the elevator system.

Figure 3B illustrates an elevator lobby arrangement according to another example of an embodiment. Figure 3B shows an example associated with an office environment where an elevator is used to transport office supplies load 310. Similarly, elevator controller 300 is configured to control three elevators 302A, 302B, and 302C. Similar to Figure 3A, cameras may be integrated into at least one of the destination operation panels 304A, 304B and/or floor displays 306A-306C. The elevator system may be configured to detect heavy objects based on image data from at least one camera, assign elevator 302C, and activate at least one preemptive action associated with the assigned elevator car in the aforementioned adjustment mode. In an exemplary embodiment, the elevator system may be configured to identify heavy objects based on image data from at least one camera. Therefore, identification may be based on, for example, an image recognition system or a machine vision system. The elevator system may be configured to identify an object as “heavy”, for example, based on the object’s size. In another exemplary embodiment, the elevator system may be configured to identify identifiers, such as text, object identifiers, QR codes, or barcodes, from the image data, and then obtain additional information about the object’s weight based on those identifiers. In another exemplary embodiment, the elevator system may be configured to receive indication of a heavy object from a system outside the elevator system.

At least some of the exemplary embodiments discussed above can implement a solution in which a heavy object can be identified before it is loaded into the elevator car. Once the object has been identified, a special operating mode can be activated for the elevator assigned to transport the object. The operating mode is configured to maintain the elevator car substantially vertical in the elevator shaft when the heavy object is loaded into the elevator car. Therefore, there will be no significant difference between the floor level of the elevator car and the floor level of the landing when the object is loaded into the elevator car. This allows for easy movement, for example, for a trolley with wheels for carrying heavy objects.

The example embodiments can be implemented using software, hardware, application logic, or a combination of software, hardware, and application logic. The example embodiments can store information relating to the various methods described herein. This information can be stored in one or more memories, such as hard disks, optical disks, magneto-optical disks, RAM, etc. One or more databases can store information used to implement the example embodiments. The databases can be organized using data structures (e.g., records, tables, arrays, fields, graphs, trees, lists, etc.) included in one or more memories or storage devices listed herein. The methods described with respect to the example embodiments can include appropriate data structures for storing data collected and/or generated by the methods of the devices and subsystems of the example embodiments in one or more databases.

As will be understood by those skilled in the art of computers and/or software, all or part of the example embodiments can be conveniently implemented using one or more general-purpose processors, microprocessors, digital signal processors, microcontrollers, etc., programmed according to the teachings of the example embodiments. As will be understood by those skilled in the software art, appropriate software can be readily prepared based on the teachings of the example embodiments. Furthermore, as will be understood by those skilled in the electrical art, the example embodiments can be implemented by preparing application-specific integrated circuits or by using appropriate networks to interconnect conventional component circuits. Therefore, the examples are not limited to any particular combination of hardware and/or software. Stored on any computer-readable medium or a combination of computer-readable media, the examples may include software for controlling components of the example embodiments, driving components of the example embodiments, enabling components of the example embodiments to interact with human users, etc. Such computer-readable media may also include computer programs for performing all or part of the processes performed in implementing the example embodiments (if the processes are distributed). The computer code device of the examples may include any suitable interpretable or executable code mechanism, including but not limited to scripts, interpreters, dynamic link libraries (DLLs), Java classes and applets, complete executable programs, etc. In the context of this document, "computer-readable medium" can be any medium or component that can contain, store, communicate, propagate, or transmit instructions for use by or in connection with an instruction execution system, apparatus, or device (such as a computer). Computer-readable medium can include computer-readable storage media, which can be any medium or component that can contain or store instructions for use by or in connection with an instruction execution system, apparatus, or device (such as a computer). Computer-readable medium can include any suitable medium that participates in providing instructions to a processor for execution. Such media can take many forms, including but not limited to non-volatile media, volatile media, transmission media, etc.

While the essential novel features applicable to its preferred embodiments have been shown and described, it should be understood that various omissions, substitutions, and changes in the form and details of the described devices and methods can be made by those skilled in the art without departing from the spirit of this disclosure. For example, all combinations of those elements and/or method steps explicitly intended to perform substantially the same function in substantially the same manner to achieve the same result are within the scope of this disclosure. Furthermore, it should be recognized that the structures and/or elements and/or method steps shown and/or described in conjunction with any disclosed form or embodiment can be incorporated as a general matter of design choice into any other disclosed or described or suggested form or embodiment.

The applicant hereby discloses each individual feature described herein, as well as any combination of two or more such features, provided that such features or combinations can be performed based on this specification as a whole, in accordance with common general knowledge of those skilled in the art, regardless of whether such features or combinations of features solve any problem disclosed herein, and without limiting the scope of the claims. The applicant notes that the disclosed aspects/embodiments may consist of any such individual features or combinations of features. In view of the foregoing description, it will be apparent to those skilled in the art that various modifications can be made within the scope of this disclosure.

Claims (15)

1. An elevator system, comprising: Device for obtaining (106) an indication of the heavy object to be transported by the elevator system; Device for allocating (100, 102) elevator cars (302A, 302B, 302C) to transport the heavy object based on the instructions; Devices (102, 104) for activating at least one preemptive action associated with the assigned elevator car (302A, 302B, 302C) in an adjustment mode in response to the instruction, wherein the adjustment mode is configured to substantially maintain the vertical position of the elevator car (302A, 302B, 302C) in the elevator shaft when the weight is loaded into the elevator car (302A, 302B, 302C). 2. The elevator system of claim 1, wherein the at least one preemptive action includes activation of a ratchet device. 3. The elevator system according to claim 1 or 2, wherein the adjustment mode includes a precision mode, and wherein in the precision mode, the device (102, 104) for activation is configured as the at least one preemptive action: Torque is set for the motors associated with the elevator cars (302A, 302B, 302C) to hold the elevator cars (302A, 302B, 302C) in the proper position in the elevator shaft; At least partially open the mechanical brake; and When the load carried by the elevator cars (302A, 302B, 302C) changes, the motor maintains the position of the elevator cars (302A, 302B, 302C) in the elevator shaft based on information from at least one sensor (108). 4. The elevator system according to claim 3, wherein the at least one sensor (108) comprises at least one of a position sensor, a strain sensor, a torque sensor, and a load sensor. 5. The elevator system according to any one of claims 1-4, wherein the device for obtaining the indication of (106) the weight is configured to obtain the indication from a system outside the elevator system. 6. The elevator system according to any one of claims 1-4, wherein the device (106) for obtaining comprises a sensor system configured to obtain image data provided by at least one camera (108) and process the image data to identify the heavy object. 7. The elevator system of claim 6, wherein the sensor system is configured to identify the heavy object by recognizing an identifier associated with the object from the image data. 8. The elevator system according to claim 6 or 7, wherein the elevator system includes the at least one camera (108). 9. The elevator system of claim 8, wherein the at least one camera (108) comprises a camera configured in at least one of the following ways: Car control panel; Car display screen; Elevator signaling equipment; Information display; Destination control panel; and Ground display. 10. The elevator system according to any one of claims 6-9, wherein the sensor system and the at least one camera (108) are arranged in a single communication segment of the elevator system. 11. The elevator system according to any one of claims 6 to 9, wherein the sensor system comprises a plurality of analysis units configured at different locations in the elevator system. 12. The elevator system according to claim 11, wherein the analysis unit and at least one camera (108) of the plurality of analysis units are arranged in a single communication segment of the elevator system. 13. The elevator system according to any one of claims 1-4, wherein the device for obtaining the indication of the weight (106) is configured to obtain the indication together with an elevator call. 14. The elevator system of claim 13, wherein the indication includes the mass of the object. 15. The elevator system according to any one of claims 1-4, wherein the device for obtaining (106) an indication of the weight is configured to obtain the indication via radio frequency transmission.