Building system with person recognition based on facial recognition

Abstract

In a building system (1) having an elevator system (3) and a security gate (10), a service request of a person (2) is detected at the security gate (10) and is stored in a storage device (26), wherein the service request is assigned a facial template of the person (2). An elevator operating device (5) in a first elevator lobby (12) has an image capturing device (5a) and a display device (5b), wherein the image capturing device (5a) generates image data of a face of a person (2) present in the field of vision of the image capturing device (5a). If the person (2) present is recognized as the person (2) who prompted the service request at the security gate (10), the person (2) present receives elevator usage information by means of the display device (5b) in the first elevator lobby (12), where the person (2) is present.

Description

[0001] 2024P00248WÖ

[0002] - 1 -

[0003] Building system with facial recognition-based person identification

[0004] Description

[0005] The technology described here relates to a building system with an elevator system and a method for operating such a building system.

[0006] Building systems with an elevator system are common knowledge. A building system can also include an access control system. An access control system can be designed in a variety of ways to control access to a restricted area, such as within a building or on a site. The design can relate, for example, to how individuals must prove their authorization to access, e.g., with a key, a magnetic stripe, chip or RFID card, or a mobile electronic device (e.g., a smartphone).

[0007] Mobile phone). WO 2010 / 112586 Al describes an access control system in conjunction with an elevator system, in which a person has to hold an optical code in front of a camera. If the code is valid, the person is granted access and can use the elevator system. The design can also relate, for example, to the way in which people are granted or denied access to the building or interior spaces at an (access control) gate; doors, revolving doors, or barriers are examples of barriers that are blocked or released depending on access authorization and can be used in such a gate.

[0008] US 2014 / 0015978 describes an access control system that does not require such a barrier. The passageway is open and barrier-free, allowing a person to pass through the gate freely without delay or obstruction. To control access, a scanning device is installed at the gate to verify credentials. Additionally, an image capture device is present that captures at least part of the face of each person approaching the scanning device. By combining information from the credentials and the image data, a person can be identified by an inspector. The image data is displayed to the inspector on their mobile device.

[0009] WO 2024 / 002637 Al describes a system for controlling access to a 2024P00248WÖ

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[0011] Access-restricted zone with an accessible airlock. The airlock includes a screen unit, a scanning device, and an image capture device. Upon recognition of a person's authorization, an access control device generates a release signal, and the screen unit is activated to display an access authorization in addition to a real-time image. The access control system may also include a camera system positioned within the access-restricted zone to detect the person and track their movement within the zone.

[0012] EP 3 041 775 Bl discloses an elevator system with a multitude of cameras in an elevator hall to enable the prediction of a specific person's movement using image processing. A so-called kiosk in the elevator hall has a camera to generate an image of a person, which is then evaluated using facial recognition. If facial features match features stored in a user profile, the person is identified. A possible destination floor for the person is then displayed at the kiosk.

[0013] WO 2021 / 122462 discloses a human-machine interface device comprising an optical projection module. The optical projection module is designed to project wayfinding information, specific to a particular person and visible to that person, either onto the floor or onto a projection surface on the wall. CN 115 397757 also discloses a gate at which at least two target floors are displayed on a surface to a person identified by facial recognition.

[0014] In a building where, for example, a building management system grants access at a gate, registers an elevator call, and assigns an elevator to handle the call, the gate may be relatively far from the elevator. While a person is walking to the elevator in such a building, the traffic situation in the elevator system may change, so that in a system with multiple elevators, a different elevator than the one assigned might be more convenient for handling the call (e.g., due to a shorter wait time). It is also possible that the person might forget which elevator is assigned to them during their walk. Therefore, there is a need for a technology that offers the advantages of access control at a gate and

[0015] - 3 -

[0016] nevertheless offers a technical solution for a changing traffic situation.

[0017] One aspect of such a technology concerns a building system with an elevator system. The elevator system comprises a control system, an elevator car that travels between floors of a building under the control of the control system, and elevator operating devices that are communicatively linked to the control system. An elevator operating device is located in an elevator hall on each floor. The building system further includes a detection device located at an airlock on the first floor at the transition to the first elevator hall and communicatively linked to the control system. The detection device is designed to capture a service request from a person at the airlock and store it in a memory device. The elevator control system is designed to assign a facial template of the person to the service request.The elevator control unit in the first elevator hall comprises an image acquisition unit and a display unit. The image acquisition unit is configured to generate image data of the face of a person present within the field of view of the image acquisition unit. The control system comprises an evaluation unit configured to determine whether the image data of the face of the person present can be matched to the face template of the person requesting the service. If so, the control system is configured to transmit elevator usage information to the display unit of the elevator control unit in the first elevator hall where the person is present.

[0018] Another aspect of the technology concerns a method for operating such a building system. According to the method, a service request from a person is detected by the detection device at the airlock, and the service request is stored in the storage device, with a facial template of the person associated with the service request. Additionally, image data of a person's face within the field of view of the image detection device in the elevator hall is generated. The control system determines whether the facial image data of the person present can be matched to the facial template of the person requesting the service, which is stored in the storage device. If so, the control system transmits elevator usage information to the 2024P00248WÖ

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[0020] Display device of the elevator control unit in the first elevator hall where the person is present.

[0021] The technology described here enables the system to recognize a person leaving a service request at an airlock and then, at a remote elevator control panel, to provide that person with elevator usage information (e.g., the assigned elevator or car, an estimated arrival time of the elevator in the first elevator hall). In one implementation example, the building system provides the person with elevator usage information exclusively at the elevator control panel; in another implementation example, the person receives elevator usage information both at the airlock and at the elevator control panel. The elevator usage information provided at the elevator control panel can be the same or different from the elevator usage information provided at the airlock.In an implementation example that may be applicable in conjunction with one or more of the preceding implementation examples, the elevator usage information is different or updated when the elevator information changes due to a change in the traffic situation in the elevator system (e.g., a change in the assigned elevator and / or the arrival time).

[0022] To identify the person, a characteristic of the individual is captured at the elevator entrance and stored along with the service request. This characteristic allows the person to be identified once they have arrived in the elevator lobby. This characteristic could be, for example, the person's face or an authorization certificate if the person is registered in the building. For instance, the authorization certificate could be stored in a user profile for the registered person, along with a facial template of that person. In the elevator lobby, image data of the person's face can then be captured to determine whether a corresponding facial template is stored in one of the many user profiles.

[0023] In an embodiment that may be applicable in conjunction with one or more of the preceding embodiments, the 2024P00248WÖ comprises

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[0025] A service request is a call for an elevator and / or an access request. The elevator system can be designed to process the elevator call and / or the access request. In one embodiment, an access control system can be present in the building system, which is designed to process the access request.

[0026] In one embodiment, which can be used in conjunction with one or more of the preceding embodiments, the elevator system comprises a second detection device located in the elevator car and communicatively linked to the control system. The evaluation device is designed to determine whether the person whose image data can be assigned to the facial template of the person requesting the service has entered the elevator car and is alone inside. The building system, or its elevator system, thus receives not only the information that the person has arrived at the elevator, but also additional information about whether the person has entered the elevator and whether they are possibly alone in the elevator car.

[0027] In an embodiment that can be used in conjunction with one or more of the preceding embodiments, the building system utilizes the additional information. The evaluation unit is designed to initiate immediate movement of the elevator car and / or present personalized media content in the elevator car when the person is alone in the elevator car. The immediate movement of the elevator car contributes, among other things, to improving the efficiency of the elevator system and ensuring that the person is transported to their destination floor in a shorter time. When the person is alone in the elevator car, personalized media content can be presented using a multimedia device. Whether and which content is presented can be stored in the person's user profile.The additional information can also be used to cancel the elevator call, thus canceling any elevator car procedure initiated by the person's call if that person is not in the elevator car. This prevents unnecessary elevator car movement and frees up the elevator car to respond to another call.

[0028] In an embodiment that, in conjunction with one or more of the 2024P00248WÖ

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[0030] As can be applied to the preceding embodiments, the storage device stores the face template in a user profile defined for the person. In one embodiment, the detection device at the gate includes an image capture device configured to generate the face template from an image of the person, with the storage device storing the face template either in the defined user profile or in a temporary profile. The latter can be created, for example, for a visitor who is not registered in the building system, or may be advantageous for a building system in which people do not need to be registered to use it.

[0031] In one implementation example, which can be applied in conjunction with one or more of the preceding implementation examples, the control system is designed to generate initial elevator usage information in response to a service request and transmit it to the person at the airlock, and to store this initial elevator usage information in the storage device as belonging to the person's face template. The person can thus be informed at the airlock about the use of the elevator system, for example, which elevator (car) will serve their elevator call and / or when the elevator will arrive in the first elevator hall.

[0032] In an embodiment that can be used in conjunction with one or more of the preceding embodiments, a screen device is arranged at the airlock and communicatively coupled to the control system, the screen device being configured to display the first elevator usage information. The information for using the elevator system can be communicated visually to the person.

[0033] In an embodiment that may be applicable in conjunction with one or more of the preceding embodiments, the elevator system comprises several elevators, each with an elevator car, wherein the first elevator usage information comprises a first allocation of a first elevator, and the elevator usage information transmitted to the display device of the elevator control unit in the first elevator hall comprises a second allocation of a second elevator, wherein the second allocation is the same as the first allocation or differs from it.

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[0035] This differs. As mentioned above, the elevator usage information will vary if the elevator information changes due to a change in the traffic situation within the elevator system.

[0036] In one embodiment, which can be used in conjunction with one or more of the preceding embodiments, the detection device is configured to capture a person's authorization when requesting service at the airlock. The control system is configured to generate an elevator call and the initial elevator usage information upon receipt of a valid authorization, and to transmit this initial elevator usage information to the person at the airlock. The control system is also configured to store the initial elevator usage information in the storage device as belonging to the person's face template. The technology described here can therefore also be used in a building that requires the use of authorization credentials.

[0037] In an embodiment that can be used in conjunction with one or more of the preceding embodiments, the detection device can be configured to detect an optical code, a biometric feature, and / or a radio signal. The authorization certificate can be detected as an optical code, a biometric feature, or a radio signal. The gate can be configured to recognize one or more types of authorization certificates. Therefore, one or more types of authorization certificates can be provided for use in a building.

[0038] The following section explains various aspects of the improved technology in more detail using exemplary embodiments in conjunction with the figures. In the figures, identical elements have the same reference numerals. They show:

[0039] Fig. 1 shows a schematic representation of an application example of a building system with an elevator system; and

[0040] Fig. 2 shows a flowchart of an exemplary embodiment of a method for operating the building system. 2024P00248WÖ

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[0042] Fig. 1 is a schematic representation of an application example of a building system 1 in a building with an elevator system 3. For illustrative purposes, only some walls and areas of the building, an entrance hall 7, and an elevator hall 12 are shown, as they might be present on one floor of the building in an exemplary situation. Exemplary areas are elevator shafts in which elevator cars 4 of the elevator system 3 can travel. The elevator shafts shown can belong to a group of elevators, which may include, for example, four elevators (AD). Instead of the four elevators shown, the elevator system 3 can have a larger or smaller number of elevators.

[0043] In the embodiments described here, building system 1 comprises elevator system 3 and at least one airlock 10. The airlock 10 is configured to initiate a service request from a person for building system 1. The service request can include an elevator call. For example, the person can enter a desired destination floor or direction of travel as an elevator call at airlock 10. Depending on the building and / or the configuration of building system 1, it may be necessary for the person to be registered in the building as an authorized user and to pass through airlock 10 only after their authorization has been verified. In such a case, the service request includes an access request in addition to the elevator call. In contrast, such registration or authorization verification may not be required in a building open to the public.

[0044] Depending on the building and / or the design of the building system 1, the airlock 10 can be a system component of the elevator system 3 or an access control system. In one embodiment, an access control function can be implemented in conjunction with the elevator system 3; for example, the elevator system 3 can grant access to a person at the airlock 10 upon presentation of valid authorization and register an elevator call to a floor designated for that person. Figure 1 illustrates this implementation in a control system 8, which includes an elevator control unit (ECS) and an access control unit (ACS), or their respective functionalities. The control system 8 is communicatively connected to the airlock 10 and the elevators (AD) and their equipment via a communication network 22. In one embodiment, the control system 8 includes an evaluation unit 8a. Those skilled in the art will recognize that the 2024P00248WÖ

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[0046] The access control system (ACS) and the elevator control system (ECS) can be located separately within the building.

[0047] In the situation shown in Fig. 1, a person 2 is located on the floor in entrance hall 7, carrying an authorization certificate 6. In this example, entrance hall 7 is not subject to any access restrictions. Entrance hall 7 can be an area inside or outside the building. The airlock 10 separates entrance hall 7 from elevator hall 12, which is subject to access restrictions and from which there is access to elevators AD. In this description, the term "building" includes, for example, residential buildings, commercial buildings, sports arenas, and shopping centers. The technology described here can also be used on or in conjunction with a ship.

[0048] Access to the (access-restricted) elevator hall 12 is monitored using access control functionality, ensuring that only authorized persons 2 can enter the elevator hall 12. According to the technology described here, access is via the airlock 10, which can be designed as an accessible airlock 10. In Fig. 1, the airlock 10 is represented by two floor-standing structures 10a, 10b, with a passageway between them. Person 2 must pass through this passageway in the direction of the arrow if they wish to enter the elevator hall 12 from the entrance hall 7. Those skilled in the art will recognize that the airlock 10 shown is exemplary and that the technology described here is not limited to such an airlock 10. Depending on the building and / or expected traffic volume, the airlock 10 can consist of several individual airlocks, each with passageways between two adjacent structures.The person skilled in the art will also recognize that the lock 10 can be designed in a different way, for example, with only one structure instead of the two structures 10a, 10b shown in Fig. 1; a passage can then exist, for example, between this structure and a building wall. The structure, or at least one of its components described below, can also be arranged on a building wall, with the passage then located in the area in front of the building wall or the components.

[0049] Lock 10 can be equipped with or without an authorization verification device. The exemplary lock 102024P00248WÖ shown in Fig. 1

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[0051] is designed for authorization verification. In an exemplary embodiment, the following components of the gate 10 are shown: a screen device 14 (e.g., comprising an LED or LCD display), a detection device 16 for capturing an authorization certificate 6, and an optional image capture device 18 (e.g., a camera). These components (14, 16, 18) are arranged by way of example on or in the (right) structure 10a, but are not limited to this arrangement. For illustration purposes, the components (14, 16, 18) are shown on a front side of the structure 10a; those skilled in the art will recognize that at least one of the components (14, 16, 18) can be arranged on another side of the structure 10a, in particular on a top side.

[0052] The (optional) image acquisition device 18 is designed and positioned accordingly at the gate 10 to capture a defined field of view in the area of ​​the gate 10. The image acquisition device 18 generates a camera image of at least a part of the person 2 located at the gate 10 within its field of view, in particular the face or a part thereof. The camera image can be stored in the storage device 26 in the form of digital image data.

[0053] The recognition device 16 can be configured in various ways, in particular it can be configured for one or more types of authorization credentials 6. For illustration, several types of authorization credentials 6 are shown in Fig. 1 (magnetic stripe card, mobile phone, biometric feature (e.g., of a face)).

[0054] An authorization certificate 6 is typically assigned to a person 2 or group of people in the building system (e.g., in a user profile database), which person 2 must present at the entrance to the access-restricted elevator hall 12. The authorization certificate 6 can be stored as a password (code) on an information carrier (e.g., in a chip of a smart card or a magnetic stripe of a magnetic stripe card) or represented (e.g., as an optical code in the form of a QR code, a barcode, or a color code). In one embodiment, the authorization certificate 6 can be a biometric feature, e.g., a facial, speech, finger, or eye pattern of person 2.2024P00248WÖ

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[0056] A user profile is created for a person 2 registered in building system 1; that is, it is stored as a data record in a database. In one embodiment, the database is located in the storage device 26 of building system 1. In Fig. 1, the storage device 26 is connected to the communication network 22. However, those skilled in the art will recognize that it, or rather its storage function, can be implemented in a different way; for example, the storage device 26 can be implemented in the elevator control unit (ECS) or the access control unit (ACS). In a person's user profile, the authorization credential 6 is assigned, for example, rights that define which rights the person has in the building. The user profile includes personal data of person 2 (e.g., name, reason for authorization (resident, employee, external service provider, visitor)), access authorizations (e.g., specific rooms 4 and floors), and possibly time restrictions on access (e.g.,Access from Monday to Friday, from 7:00 to 20:00). Alternatively, instead of creating and managing the user profile in building system 1, the user profile can be created in a database of a remote building management system, whereby the building system can access this database via the internet and / or a cloud computing technology.

[0057] The recognition device 16 is adapted to the authorization credential(s) 6 to be used in the building. In one embodiment, the recognition device 16 can include an optical reading device (e.g., a digital camera) to capture, for example, an optical code from an information carrier. The information carrier can be, for example, in the form of a credit card-sized employee ID card or similar; in another embodiment, a mobile phone (or a similar electronic device) belonging to person 2, which displays the optical code on a screen, serves as the information carrier. The digital camera of the optical reading device (or an additional digital camera) can be used in one embodiment to capture a biometric authorization credential 6.The captured biometric authorization certificate 6 can then be used in conjunction with a recognition device and stored biometric data of persons registered in the building 2 to determine access authorization, e.g., by means of facial recognition. 2024P00248WÖ.

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[0059] Additionally or alternatively, a radio-based reading device can be provided that reads the authorization certificate 6, for example, from a chip of an RFID transponder. An employee ID card or similar device, or a mobile phone, can serve as the RFID transponder. In one embodiment, the radio-based reading device can be configured for communication with the mobile phone or similar device using near-field communication (NFC), ultra-wideband (UWB), or Bluetooth technology.

[0060] In elevator hall 12, two elevator control units 5 are shown as examples in Fig. 1 (this number is not limited to this). These units are communicatively coupled to the control unit 8 via the communication network 22. One elevator control unit 5 is located on the side of elevators A, B, and the other elevator control unit 5 is located on the side of elevators C, D. Each elevator control unit 5 has an image acquisition unit 5a and a display unit 5b. These image acquisition units 5a are used to generate image data for facial recognition purposes.

[0061] The elevator cars 4 are equipped with detection devices 24, which are communicatively coupled to the control system 8. The detection device 24 can be designed according to a technology also used in one of the detection devices 16, 18. The detection device 24 can, for example, include a camera or a radio-based device (BLE, UWB).

[0062] As indicated in Fig. 1 at the image acquisition device 5a, the image acquisition device 5a generates an image of person 2 (in particular, of the face) who is located within the detection range or field of view of the image acquisition device 5a. In one embodiment, the image acquisition device 5a comprises a digital camera with selectable and / or adjustable properties; in this embodiment, camera images are thus available as digital data sets. The properties of the digital camera, for example, resolution (e.g., specified in megapixels), exposure, and focal length, are selected or set such that the image data is evaluable and image data of person 2's face is generated in usable quality. 2024P00248WÖ

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[0064] The image acquisition device 5a can be equipped with a sensor module or connected to a separate sensor module that activates the image acquisition device 5a when it detects the presence of a person 2 in its field of view. The sensor module can, for example, include a proximity sensor, which can be configured as an ultrasonic sensor, a radar sensor, an infrared sensor, or an optical sensor (e.g., a light barrier, a brightness sensor). Alternatively, in one embodiment, the presence of a person 2 in the detection range of the image acquisition device 5a can be detected by changes in the field of view. For example, if the person 2 enters the field of view and the image acquisition device 5a is continuously in an active state, the image acquisition device 5a records changes against an essentially static background; these changes are interpreted as presence.

[0065] Methods and devices for detecting a face in an image or image data, including for determining the position of the face in the image, are known to those skilled in the art, e.g. from Rein-Lien Hsu et al., "Face detection in color images", IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 24, No.

[0066] 5, May 2002, pp. 696-706. Furthermore, image processing methods are known, for example, from US 8,494,231 B2. A basic description of image processing for the purpose of facial recognition is provided in the publication "Facial Recognition" by the German Federal Office for Information Security (available under the topic of biometrics at www.bsi.bund.de). This publication distinguishes between three main steps: "creating a template," "generating a reference dataset," and "comparing facial images." To make the comparison of two facial images as simple and quick as possible, the features of a face are determined and stored in the form of a feature dataset called a "template." Once a user's face has been found and normalized in an image, additional features beyond the eyes, nose, and mouth / chin area are searched for, measured, and compared.These extracted features are coded, compressed, and stored as a feature data set (template). To determine the similarity of the templates of two facial images, they are combined using a mathematical algorithm. This yields a degree of similarity between the templates. If the result falls within certain tolerance limits, the two images are combined.

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[0068] Templates, and thus the underlying facial images, are classified as identical.

[0069] The person skilled in the art recognizes that the image acquisition device 18, optionally arranged in the lock 10, can be designed functionally and structurally analogous to the image acquisition device 5a. Depending on the design, the image acquisition devices 5a and 18 can each process the generated image themselves or forward it to another system component, in particular to the control system 8.

[0070] In the situation shown in Fig. 1 within the building, the technology described here is advantageously applicable. Based on the situation shown in Fig. 1 and with an understanding of the components described above and their functionalities within building system 1, an exemplary method for operating building system 1 is described below in conjunction with Fig. 2. The description refers to person 2, who, coming from entrance hall 7, wishes to enter the access-restricted elevator hall 12 at gate 10, for example, to use an elevator (AD). Person 2 carries an authorization certificate 6, which, for example, is designed as a credit card-style employee ID card, as shown in Fig. 1. The authorization certificate 6 must be presented at gate 10 to gain access to the access-restricted elevator hall 12. The method begins in step S1 and ends in step S8.The person skilled in the art recognizes that the division into these steps is exemplary, that further steps may exist, and that one or more of these steps can be divided into one or more sub-steps, or that several of the steps can be combined into one step.

[0071] In Fig. 1, person 2 moves in the direction of the arrow shown towards access control point 10 to request a service on the floor, for example, to access elevator hall 12 and from there go to another area of ​​the building, or to use elevator A - D. At access control point 10, an authorization certificate 6 must be presented to the recording device 16, 18, which initiates a service request. By presenting the authorization certificate 6, access and an elevator ride are requested as a service (or an elevator call is entered). As explained above, the building system 1 can operate without a recording device for a 2024P00248WÖ

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[0073] The authorization verification must be designed accordingly. In step S2, the person's service request is recorded by the recording device 16, 18 at the gate 10.

[0074] In step S3, the service request is stored in the storage device 26, and a face template of the person is assigned to the service request. When using the authorization certificate 6, the face template can be stored in the user profile of the person thereby identified. In one embodiment, the face template can be generated in conjunction with the service request from a camera image produced at the gate 10; this can be provided with or without the use of the authorization certificate 6.

[0075] Person 2 can be given (initial) elevator usage information at the airlock 2; for example, the approximate arrival time of the elevator (e.g., an indication in seconds or minutes) and / or, in an elevator system 3 with multiple elevators A-D, which elevator A-D is assigned to their service request (elevator call). In Fig. 1, the screen 14 displays elevator "B" for illustration purposes. Once Person 2 passes through the airlock 10, they are in the elevator hall 12 and proceed to the (assigned) elevator.

[0076] In step S4, image data of a person's face is generated that is present in the elevator hall 12 within the field of view of the image acquisition device 5a. This person could be person 2, who initiated the service request recorded in step S2, or another person present for whom a different service request needs to be fulfilled, or who happens to be in the area of ​​the image acquisition device 5a.

[0077] In step S5, the evaluation unit 8a of the control system 8 determines whether the facial image data of the person present (2), generated in step S4, can be assigned to the facial template of the person requesting the service (2) stored in the storage unit 26. This determines whether the person who requested the service at the gate 10 is recognized by the elevator control unit 5. If so, the procedure proceeds along the "yes" branch to step S6; otherwise, it proceeds along the "no" branch to step S7.

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[0079] In step S6, the evaluation unit 8a of the control system 8 transmits elevator usage information to the display unit 5b of the elevator operating unit 5 in the first elevator hall 12, where person 2 is present. The control system 8 transmits the elevator usage information to the elevator operating unit 5, from which the image data generated in step S4 originates; the image data can be transmitted to the control system 8, for example, together with a device identifier or number of the elevator operating unit 5.

[0080] The transmitted elevator usage information may include an updated elevator allocation because, for example, the traffic situation in elevator system 3 has changed and another elevator can fulfill the service request more cost-effectively (e.g., with a shorter waiting time or fewer intermediate stops). In Fig. 1, the screen unit 5b displays elevator "A" for illustration purposes (the elevator allocation has changed from elevator "B" to elevator "A"). The expected arrival time can also be displayed. If, for example, the elevator allocation has not changed, elevator "B" may still be displayed.

[0081] In step S7, the screen unit 5b can display information independent of person 2 or their service request, such as input fields for specifying a desired floor or direction of travel. The screen unit 5b displays this information, for example, if the generated image data in step S4 cannot be assigned or cannot be clearly assigned. Depending on the situation in elevator hall 12, several people may be present, and one of these people might be detected by the "wrong" elevator control unit 5. It is also possible that several people are within the field of view of the camera unit 5a, and the generated image data may then depict multiple faces. The process ends in step S8.

[0082] The detection devices 24 present in the elevator cars 4 in one embodiment can be used by the evaluation unit 8a to determine whether the person 2, whose image data can be assigned to the facial template of the person requesting the service, has entered the elevator car 4 and is alone in the elevator car 4. The building system 1, or its elevator system 3, thus receives not only the information that the person 2 has arrived at the elevator, but also...

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[0084] Additional information about whether person 2 has also entered the elevator and whether they are possibly alone in elevator car 4.

[0085] Building system 1 can utilize the additional information. Evaluation unit 8a is configured to initiate an immediate procedure for elevator car 4 and / or to present personalized media content in elevator car 4 if person 2 is alone in elevator car 4. The immediate procedure of elevator car 4 contributes, among other things, to improving the efficiency of elevator system 3 and ensuring that person 2 is transported to their destination floor more quickly. If person 2 is alone in elevator car 4, personalized media content can be presented via a multimedia device. Whether and which content is presented can be stored in person 2's user profile. The additional information can also be used to cancel the elevator call, and thus cancel an elevator car 4 procedure based on person 2's call, if person 2 is not in elevator car 4.An unnecessary movement of the elevator car is avoided, and the elevator car is available to respond to another elevator call.

[0086] Referring again to the situation shown in Fig. 1, if person 2 moves in the direction of the arrow shown in Fig. 1 and presents their valid authorization 6 to the detection device 16, this means, for example, that person 2 wishes to be transported to a desired destination floor using one of the elevators (AD). The destination floor can be stored in the user profile created for person 2 in a building management system of building system 1. The control unit 8 (ECS) can, for example, be configured as a group control unit with destination call control technology. Upon detection of person 2, a destination call is initiated, specifying the destination floor stored in person 2's user profile and the floor on which the airlock 10 is located as the boarding floor.If access control takes place, for example, in entrance hall 7, which persons 2 must pass through to reach the elevators AD, a destination call can be initiated for each person 2 granted access. The control unit 8 (ECS) identifies an elevator for which the destination call can be executed and informs person 2 of the identified elevator, for example, via the display unit 14 at the airlock 10. If there are multiple airlocks 10, such a display unit 142024P00248WÖ can be installed at each airlock 10.

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[0088] The control unit 8 (ECS) detects at which gate 10 person 2 is located and controls the screen unit 14 arranged there to display the assigned elevator in the display area 34 (e.g., "B", Fig. 12). Those skilled in the art will recognize that the screen unit 14 may be configured to generate a corresponding voice message.

Claims

2024P00248WÖ - 19 - Patent claims 1. Building system (1) with a lift system (3), wherein the lift system (3) comprises: a control system (8), an elevator cabin (4) which is controlled by the control system (8) and can be moved between floors of a building; Elevator operating devices (5) which are communicatively connected to the control system (8), wherein an elevator operating device (5) is arranged in an elevator hall on each of the floors; characterized in that, that a first detection device (16, 18) is arranged at a lock (10) on a first floor at a transition to a first elevator hall (12) and is communicatively coupled to the control system (8), wherein the first detection device (16, 18) is configured to detect a service request from a person (2) at the lock (10) and to store it in a storage device (26), wherein the elevator control (12) is configured to assign a face template of the person (2) to the service request, that the elevator control device (5) in the first elevator hall (12) comprises an image acquisition device (5a) and a display device (5b), wherein the image acquisition device (5a) is designed to generate image data of a face of a person (2) present in the field of view of the image acquisition device (5a); that the control system (8) includes an evaluation unit (8a) configured to determine whether the image data of the face of the person present (2) can be matched to the face template of the person requesting the service (2), wherein, if this is the case, the control system (8) is configured to transmit elevator usage information to the display unit (5b) of the elevator control unit (5) in the first elevator hall (12) where the person (2) is present.

2. Building system (1) according to claim 1, wherein the storage device (26) stores the face template in a user profile defined for the person (2), or wherein the first acquisition device (18) at the gate (10) comprises an image acquisition device (18) configured to generate the face template from an image of the person (2), wherein the storage device (26) stores the face template either in the defined user profile or in a 2024P00248WÖ - 20 - temporary profile.

3. Building system (1) according to claim 1 or 2, wherein the elevator system (3) comprises a second detection device (24) arranged in the elevator car (4) and communicatively coupled with the control system (8), wherein the evaluation device (8a) is configured to determine whether the person (2), whose image data can be assigned to the face template of the person (2) requesting the service, has entered the elevator car (4) and is alone in the elevator car (4).

4. Building system (1) according to claim 3, wherein the evaluation device (8a) is configured to initiate an immediate procedure of the elevator car (4) and / or to present personalized media content in the elevator car (4) when the person (2) is alone in the elevator car (4), and to cancel a procedure of the elevator car (4) according to an elevator call from the person (2) when the person (2) is not in the elevator car (4) after a specified period of time.

5. Building system (1) according to one of the preceding claims, wherein the control system (8) is configured to generate initial elevator usage information in response to the service request and to transmit it to the person (2) at the airlock (10), and to store the initial elevator usage information in the storage device (26) as belonging to the face template of the person (2).

6. Building system (1) according to claim 5, in which a screen device (14) is arranged at the lock (10) and is communicatively coupled with the control system (8), wherein the screen device (14) is designed to display the first elevator usage information.

7. Building system (1) according to one of claims 5 - 6, wherein the control system (8) is configured, to update the initial elevator usage information depending on a traffic situation of the elevator system (3) and to generate updated initial elevator usage information, and either the first elevator usage information or the updated first elevator usage information to the display device (5b) of the 2024P00248WÖ - 21 - to transmit to the elevator control device (5) in the first elevator hall (12).

8. Building system (1) according to one of claims 5 - 7, wherein the elevator system (3) comprises several elevators (A - D) each with an elevator car (4), wherein the first elevator usage information comprises a first allocation of a first elevator (A - D), and the elevator usage information transmitted to the display device (5b) of the elevator control device (5) in the first elevator hall (12) comprises a second allocation of a second elevator (A - D), wherein the second allocation is the same as or differs from the first allocation.

9. Building system (1) according to one of claims 5 - 8, wherein the first detection device (16, 18) is configured to detect an authorization certificate (6) of the person (2) when requesting service at the lock (10), wherein the control system (8) is configured upon presentation of a valid authorization certificate (6), to generate a lift call and the first lift usage information and to transmit the first lift usage information to the person (2) at the airlock (10), and to store the first elevator usage information in the storage device (26) as belonging to the face template of the person (2).

10. Building system (1) according to claim 9, wherein the storage device (26) stores the face template in a user profile of the person (2) as assigned to the authorization certificate.

11. Building system (1) according to one of the preceding claims, wherein the elevator usage information transmitted to the display device (5b) of the elevator control device (5) in the first elevator hall (12) includes an arrival time of an elevator car (4).

12. Method for operating a building system according to one of claims 1-11, comprising: Recording a service request from a person (2) by the first recording device (16, 18) at the lock (10); Storing the service request in the storage device (26), wherein the 2024P00248WÖ - 22 - Service request is assigned a face template of the person (2); Generating image data of a face of a person (2) present in the elevator hall (12) within the field of view of the image acquisition device (5a); Determine, by means of the control system (8), whether the image data of the face of the person present (2) can be assigned to the face template of the person requesting the service (2) stored in the storage device (26); and If this is the case, the control system (8) transmits lift usage information to the display device (5b) of the lift control device (5) in the first lift hall (12) where the person (2) is present.

13. Method according to claim 12, further comprising generating a first elevator usage information in response to the service request, transmitting the first elevator usage information to the person at the airlock (10) and storing the first elevator usage information in the storage device (26) as belonging to the face template of the person (2).

14. Method according to claim 13, further comprising updating the first elevator usage information depending on a traffic situation of the elevator system (3), and transmitting the updated elevator usage information as the elevator usage information to the display device (5b) of the elevator control device (5) in the first elevator hall (12).

15. Method according to one of claims 13 - 14, further comprising the acquisition of an authorization certificate by the first acquisition device (16, 18) upon service request at the gate (10), wherein, in the case of a valid authorization certificate (6), an elevator call and the first elevator usage information are generated and the first elevator usage information of the person (2) is transmitted at the gate (10), and wherein the first elevator usage information is stored in the storage device (26) as belonging to the face template of the person (2).

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