EP3935247A1

EP3935247A1 - Access control system comprising a sliding door that is opened contactlessly from the inside

Info

Publication number: EP3935247A1
Application number: EP20706357.9A
Authority: EP
Inventors: Paul Friedli; Jonas Vonaesch
Original assignee: Inventio AG
Current assignee: Inventio AG
Priority date: 2019-03-08
Filing date: 2020-03-02
Publication date: 2022-01-12
Also published as: AU2020233914A1; CN113508211B; CN113508211A; AU2020233914B2; WO2020182512A1

Abstract

The invention relates to a system for controlling access to an access-restricted zone (22) in a building, comprising a sliding door system (5) and a control device (8, 10) for the sliding door system (5). The sliding door system (5) has a door frame (2) and a sliding door (4) which can be moved in the door frame (2) between a closed position and an open position by a drive device (6). The door frame (2) has a pass-through region (24) and a wall panelling region (18), which at least partially accommodates the sliding door (4) in the open position. A control device (8) is arranged on the sliding door (4) and is communicatively connected to the drive device (6). The control device (8) is designed to control a moving of the sliding door (4) between the closed position and an open position. An activation device (19) is arranged in an interior space of the sliding door (4) and is communicatively connected to the control device (8). The activation device (19) is designed to generate an activation signal (AS) if a user (20) who wishes to leave the access-restricted zone (22) approaches an established distance from the sliding door (4). When there is an activation signal (AS), the control device (8) is designed to allow a moving of the sliding door (4) from the closed position into the open position.

Description

Access control system with a sliding door that can be opened from the inside without contact

description

The technology described here relates generally to an access control system for a building. Embodiments of the technology relate in particular to a

Access control system with a building sliding door and a method for operating the access control system.

Access control systems can be designed in the most varied of ways in order to grant or deny people access to a restricted-access zone. The design can relate, for example, to the way in which people (users) have to identify themselves as authorized to access, e.g. B. with a key, a magnetic, chip or RFID card or a mobile electronic device (z. B. mobile phone). WO 2010/112586 A1 describes an access control system in which an access-authorized user on a mobile phone is shown an access code on a display. If the user holds the mobile phone to a camera so that it can capture the displayed access code, the access control system grants the user access if the access code is valid.

The design of an access control system can also relate to the way in which access is granted or denied to people, for example through doors, locks or barriers. It is known, for example, that an electronic lock is arranged on a door, at which an access code must be entered so that the door can be unlocked and opened. In addition to this unlocking function on a door, it is known to monitor the passage through the door. WO 2018/069341 A1 describes, for example, a device that uses sensors to monitor whether and which users are moving through a door. For user monitoring using

Infrared image recording and infrared pulse lighting, the device has a stereometric user recognition device, consisting of a radiation source and an image recording device, which is fixed in a stationary manner near a wall or a door frame. The user identification device determines the geometric

Dimensions of a user (human, car) to determine how far the door should be opened for the user to pass. This is intended to ensure the comfort and safety of the passing user, for example a running or Feel the person driving safely when passing the door.

The systems mentioned relate to different requirements of the access control and related configurations of the access control systems. In addition to these known requirements, there are further requirements, for example a person who is already in a restricted-access zone should be able to leave it quickly, safely and comfortably, in particular also in an emergency. There is therefore a need for a technology for an access control system which meets these requirements, this technology in particular having to take account of the aspect of leaving without negatively influencing the comfort for users.

One aspect of such technology relates to a system for controlling access to a restricted area in a building. The system has a

Sliding door system and a control device for the sliding door system. The

Sliding door system has a door frame and a sliding door in the door frame between a closed position and an open position by means of a drive device. The door frame has a passage area and a wall shell area that at least partially receives the sliding door in the open position. A control device is arranged on the sliding door and with the

Drive device communicatively connected. The control device is designed to control a movement of the sliding door between the closed position and an open position. An activation device is arranged in an interior space of the sliding door and communicatively connected to the control device. The

Activation device is designed to generate an activation signal when a person who wishes to leave the restricted-access zone approaches the sliding door up to a specified distance. The control device is designed to initiate a movement of the sliding door from the closed position into an open position when an activation signal is present.

Another aspect of the technology relates to a method of operating a system for controlling access to a restricted area in a building. The system comprises a sliding door system and a control device for the

Sliding door system. According to the method, an activation signal is generated by an activation device, which is located in an interior of a sliding door of the Sliding door system is arranged and communicatively connected to the control device. The activation device is designed to generate the activation signal when a person who wishes to leave the restricted-access zone approaches the sliding door up to a specified distance. According to the method, a drive unit of the sliding door system is also activated by the control device when an activation signal is present in order to initiate a movement of the sliding door from the closed position into a first open position.

The technology described here creates an access control system that opens the sliding door for a user who wants to leave the restricted-access zone without contact. Such a situation exists, for example, if the user wants to leave his apartment or another room; d. H. the user wants from

Inside the apartment to the outside into the public zone. The user only has to approach the sliding door up to a specified distance from the inside so that the system initiates the opening of the sliding door. The approach can also consist in the user stretching out a hand in the direction of the sliding door, for example. This also allows the user to express his intention to leave the restricted-access zone.

In one embodiment, the sliding door has an inner door leaf facing the restricted-access zone and an outer door leaf facing away from the restricted-access zone. Between the inner door leaf and the outer door leaf, the interior space in which the activation device is arranged and a

Approach to the inner door leaf detected. The inner door leaf thus points into the interior of the apartment, for example. The activation device arranged in the interior of the sliding door is covered by the inner door leaf and from the

Inside of the apartment not visible.

In one embodiment, the activation device has a first

Proximity sensor and a processing device connected thereto, wherein the processing device is communicatively connected to the control device. A proximity sensor, also known as a proximity switch or proximity switch, reacts to proximity, i.e. H. without direct contact, and can - depending on

Use case - be designed according to one of different measurement principles, z. B. as an inductive or capacitive proximity sensor.

In the exemplary embodiments mentioned in this description, the first

Proximity sensor designed as a capacitive proximity sensor. The capacitive one

Proximity sensor comprises a first conductive field plate which is arranged in the interior on the inner door leaf. The field plate can thus be arranged in a space-saving manner and not visible from the outside. Nevertheless, a change in capacity can be detected when the user approaches the sliding door, e.g. B. from the inside of the apartment.

In a further exemplary embodiment, the activation device has a second proximity sensor which is connected to the processing device. The second proximity sensor comprises a second capacitive proximity sensor with a second conductive field plate. The second conductive field plate is also arranged in the interior space on the inner door leaf. As a result, the system can be designed for different applications.

In one embodiment, the first and second are proximity sensors

Proximity sensor designed to detect an approach of the user and to generate a detection signal in each case. The processing device is designed to process at least one of the detection signals, d. H. it can both

Detection signals are processed or only one of the two.

In one exemplary embodiment, both detection signals can be processed if the first and second field plates are arranged essentially horizontally next to one another at a specified distance. As a result, a first point in time at which a first detection signal is determined can be determined, the first detection signal being generated by one of the two proximity sensors. In addition, a second point in time can be determined at which a second detection signal is determined, the second detection signal being generated by the other of the two proximity sensors. A direction of movement can be determined from the comparison of the points in time determined.

One of the two detection signals can be processed in one embodiment when the first field plate and the second field plate are on each other different heights are arranged on the inner door leaf. As a result, the access control system can be adapted to different circumstances and user requirements (e.g. automatic door opening for pets, in particular during a defined period of time).

In one exemplary embodiment, the method also includes generating a second activation signal when the user performs a specified gesture. If there is a second activation signal, the drive unit is activated by the control device in order to initiate a movement of the sliding door from the first open position to a second open position. In this way, it can be prevented, for example, that the sliding door 4 is unintentionally opened so far that a user can pass if the user is unintentionally too close to the sliding door.

With the technology described here, it is an advantage that in particular the

Activation device, the control device and the drive device are arranged on the sliding door and moved along with it. As a result, maintenance and / or repair work can be carried out with relatively little effort, for example the sliding door can be wholly or partly removed from the door frame in order to gain access to the components arranged on the sliding door. This also makes it possible to replace a defective sliding door with a new sliding door or a temporary replacement sliding door while the defective sliding door is being repaired in a workshop.

The technology described here also has an advantage that its use is not restricted to a specific type of sliding door system. In one

In the exemplary embodiment, the sliding door can comprise an actuator which is designed to position the door leaves in the closed position of the sliding door in a first position with a first leaf spacing and in the open position of the sliding door in a second position with a second leaf spacing. The first sheet spacing is larger than the second sheet spacing.

Various aspects of the improved technology are explained in more detail below using exemplary embodiments in conjunction with the figures. In the figures the same elements have the same reference numerals. Show it:

1 shows a schematic representation of an exemplary situation in a building with an access control system according to an exemplary embodiment;

2A shows a schematic illustration of an exemplary sliding door system with a closed sliding door;

FIG. 2B is a schematic illustration of the sliding door system from FIG. 2A, the sliding door being in an intermediate position; FIG.

FIG. 2C is a schematic illustration of the sliding door system of FIG. 2A with the sliding door in an open position;

3 shows a schematic illustration of an exemplary embodiment of a

Spruce projection device of a sliding door which is used in the exemplary embodiment of an access control system shown in FIG. 1;

4 shows schematic representations of exemplary pictograms which can be generated by the spruce projection device shown in FIG. 3;

5 shows a schematic illustration of an exemplary embodiment of a

Activation device of a sliding door, which is shown in FIG

Embodiment of an access control system is used;

6 shows a schematic illustration of an exemplary embodiment of a

Control device for the access control system shown in FIG. 1; and

7 shows a flow diagram of an exemplary embodiment of a method for operating an access control system.

1 is a schematic representation of an exemplary situation in a building with an access control system 1, which has a sliding door system 5 and a

Sliding door system 5 controlling control device 8 (DC) comprises. The sliding door system 5 is inserted into a building wall and represents a physical barrier between a public zone 21 and a restricted-access zone 22. In relation to the xyz coordinate system shown in FIG -Axis is spanned. The restricted-access zone 22 can e.g. B. be an apartment, a business space or another space in a building. The sliding door system 5 can be in a building inner wall (for a building-internal access control, z. B. access to an apartment) or in a

External building wall (for checking access to the building) must be inserted. How detailed elsewhere in this description opens the

Sliding door system 5 is a sliding door 4 for an authorized user 20, while it remains closed for a non-authorized user 20. The term “building” in this description includes, for example, residential and / or

To understand commercial buildings, hospitals, sports arenas, airports and ships.

In the situation shown in FIG. 1, there are embodiments of those described here

Technology can be used in an advantageous manner in order to operate the access control system 1 with the highest possible degree of security, with the user 20 still being able to comfortably be granted access to the restricted-access zone 22. In addition, the technology described here allows the user 20 to comfortably leave the restricted-access zone 22. Briefly and as an example, the operation of the access control system 1 takes place according to an embodiment as follows: If the user 20 is in the restricted-access zone 22 and intends to leave it, this is recognized according to an embodiment of the technology and the sliding door 4 is opened, without the user 20 for this z. B. the sliding door 4, a door handle, a door key o. Ä. Must touch. An activation device 19 detects the intention of the user 20 by means of a proximity sensor and causes the sliding door 4 to be opened.

The sliding door system 5 shown in FIG. 1 comprises a door frame 2 (also referred to as a door frame) and the sliding door 4. The door frame 2 has a passage area 24 and a wall shell area 18 which is designed to at least partially accommodate the sliding door 4. For this purpose, the wall shell area 18 has a structure which forms a cavity which is dimensioned to accommodate the sliding door 4. The passage area 24 is the area in the building wall in which passage along the y-axis from one zone (21, 22) to the other zone (21, 22) is possible; it exists between a vertical frame part 2a (door post) and the opposite wall shell area 18. Depending on the configuration, the wall shell area 18 is accommodated in a cavity in the building wall or the wall shell area 18 can be regarded as part of the building wall, possibly after cladding.

The sliding door 4 is displaceable in the door frame 2 between a closed position shown in FIG. 2A and an open position shown in FIG. 2C. Based on the xyz coordinate system shown in FIG. 1, the sliding door 4 is shifted along the x-axis. In the open position shown in FIG. 2C, the sliding door 4 is located in one embodiment essentially within the wall shell area 18. Between these maximum positions, the sliding door 4 can assume an intermediate position shown in FIGS. 1 and 2B, in which the sliding door 4 ( and accordingly the passage area 24) is open to a greater or lesser extent, ie an end face 30 of the sliding door 4 is at a variable distance from the frame part 2a. This variable distance is shown as the opening width W in FIG. 2B.

The sliding door 4 has two essentially parallel door leaves 26, each on an inside and an outside of the sliding door 4. The inside of the sliding door 4 faces the restricted-access zone 22 and the outside of the sliding door 4 faces the public zone 21. Correspondingly to this, the door leaf 26 is designated on the inside as the inner door leaf 26 and that on the outside as the outer door leaf 26.

The door leaves 26 are spaced apart from one another (in the y-direction) so that there is an interior space between the door leaves 26, in which system components and, if necessary, insulation material for soundproofing and fire protection can be arranged. The door leaves 26 are connected to one another in the area of the end face 30, as shown for example in FIG. 2A. Each of the door leaves 26 extends essentially parallel to the x-z plane.

In addition to the aforementioned control device 8 and activation device 19, FIG. 1 shows a recognition device 14, an interface device 7, a sensor device 10, a camera device 3 for face recognition, a light projection device 13, a detection device 17 and a drive device 6 (M), the components in one embodiment of the sliding door system 5 are. In the following, exemplary embodiments are described based on the access control system 1 shown in FIG. 1 and its system components. Those skilled in the art will recognize that one or more of these system components can be optional; d. H. Depending on the requirements in the building, z. B. the light projection device 23 and / or the

Activation device 19 are omitted. Instead, z. Alternative facilities can be used, e.g. B. optoelectronic displays (displays), electromechanical displays, door handles or door key systems. For example, in a

Embodiment an activation device 19 may be present, but no light projection device 23. If in this embodiment a display of Information is desired, can be done for. B. a display can be provided. The person skilled in the art recognizes that this applies analogously to other system components.

In one embodiment, the sliding door system 5 is with a

Building management system 12 (BM) connected; im shown in FIG

In the exemplary embodiment, this connection is made by means of a communication network 28 to which the building management system 12 and the interface device 7 are coupled. A person skilled in the art recognizes that the building management system 12 can be wholly or partially outsourced to an IT infrastructure for so-called cloud computing (also known as “cloud” in colloquial terms). This includes, for example, storing data in a remote data center, but also executing

Understand programs that are installed remotely rather than locally. Depending on the configuration, a specific functionality can be made available, for example, in the control device 8 or via the “cloud”. For this purpose, for example, a software application or program parts thereof can be executed in the “cloud”. If necessary, the control device 8 then accesses this infrastructure via the interface device 7 in order to execute the software application.

The communication network 28 can comprise an electronic bus system in an execution system. In one embodiment, the electrical connection of the sliding door system 5, including its supply of electrical energy, takes place via the interface device 7. A person skilled in the art recognizes that several sliding door systems 5 can be present in the building and that each of these sliding door systems 5 is coupled to the communication network 28 to communicate with the building management system 12, for example in connection with a determination and checking of access authorizations, if these are carried out centrally by the building management system 12.

The control device 8 is through an electrical connection 32 with the

Sensor device 10 connected. The control device 8 is also by means of an electrical connection 34 to the drive device 6 and the

Interface device 7 connected. The electrical connections 32, 34 are designed for signal and / or energy transmission; for this purpose they can each comprise individual electrical lines or an electrical bus system. The control device 8 is also connected to the camera device 3 and the

Detection device 14 connected. With the help of the camera device 3 and / or the detection device 14 it can be determined in one embodiment whether the user 20 is authorized to gain access to the restricted-access zone 22. If the determination reveals that the user 20 is authorized to access, the control device 8 causes the sliding door 4 to be opened. A person skilled in the art recognizes that, depending on the requirements in the building in the access control system 1, both or only one of the named devices (camera device 3, detection device 14) are present can.

The camera device 3 comprises a camera, e.g. B. a digital camera, a

Storage device and an image processing module. The image processing module is configured to carry out a computer-aided method for image processing.

Image processing methods are known, for example from US Pat. No. 8,494,231 B2. A basic description of image processing for the purpose of face recognition is described in the publication "Face Recognition" by the German Federal Office for Information Security (under the topic of biometrics, available at the Internet address www.bsi.bund.de). This publication distinguishes between the three main working steps "create template", "create reference data record" and "compare facial images". In order to keep 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 data set called a "template". If the face has been found and normalized in a picture of the user, further features in addition to the eyes, nose and mouth / chin area are searched for, measured and set in relation to one another. These extracted features are coded, compressed and saved as a feature data set (template). In order to determine the similarity of the templates of two facial images, they are combined using a mathematical algorithm. This results in a degree of similarity between the templates. If the result is within certain tolerance limits, the two templates, and thus the facial images on which they are based, are classified as identical.

Various situations can arise on the sliding door system 5; the user 20 may want to enter the restricted-access zone 22 or want to leave it. In an exemplary situation, the user 20 is in the public zone 21 and approaches the sliding door 4 to enter the restricted-access zone 22. In one embodiment, the approach activates the camera device 3, which then determines a face template from an image recording of the user 20 and compares it with stored templates of users with access authorization. The person skilled in the art recognizes that the image recording on a display device (e.g. video monitor), for example in connection with a (video) door intercom system, in the

restricted access zone 22 can be displayed. Depending on the configuration, the image can also be saved.

A person skilled in the art recognizes that the camera device 3 can also be designed to record other biometric features (e.g. iris / retina pattern, pattern of a fingerprint).

The recognition device 14 is designed to receive one from the user 20

Detect authorization verification, based on which the access control system 1 can determine the access authorization of the user 20. The credentials can be in the form of a physical key, a manually entered password (e.g. a PIN code), a biometric feature (e.g. fingerprint, iris pattern, speech / voice characteristics) or one of a magnetic, chip or RFID card or an electronic device (NFC, Bluetooth or cellular network based) recorded access codes. The user 20 presents the proof of authorization when he wishes to access the restricted-access zone 22.

According to the forms mentioned that the proof of authorization can have, the proof of authorization can be presented in different ways, for example by a conscious manual action (e.g. entering a PIN code or holding out an RFID card) or by going to the door to to get within radio range of the detection device 14 (e.g. for establishing a Bluetooth connection). The detection device 14 can be arranged on the sliding door 4, on the door frame 2 or in the vicinity thereof; it can for example be arranged in the interior of the sliding door 4 so that it can detect the authorization when the user 20 is in the public zone 21. The recognition device 14 is designed in accordance with the authorization verification provided in the access control system 1. This means that the recognition device 14 has, for example, a door cylinder, a detection device for a biometric feature, a detection device for an optical code, a reader for a

Magnetic stripe card or a chip card, a keyboard or a

Touch-sensitive screen for manual entry of a password, a transmitting and receiving device for radio signals. The person skilled in the art recognizes that in one exemplary embodiment the sliding door system 5 can have more than one identification device 14, each for a different type of credentials, or that one identification device 14 is designed for several types of credentials.

The person skilled in the art also recognizes that a arranged on the sliding door 4

Detection device 14 is designed or arranged in such a way that the sliding door 4 can be moved into the wall shell area 18. For this purpose, the detection device 14 can be arranged in the interior of the sliding door 4; it can also be arranged in the area of the end face 30 if this area does not extend into the wall shell area 18 in the open position.

In the exemplary embodiment shown in FIG. 1, the recognition device 14 detects an authorization certificate which a radio device 37 carried by the user 20 transmits as a radio signal. The radio signal can be sent in accordance with a known standard for radio communication (e.g. RFID, WLAN / WiFi, NFC, Bluetooth). Correspondingly, the detection device 14 is designed to receive such a radio signal; In Fig. 1, a transmitting / receiving device 16 and an antenna connected to it is shown for this purpose. A person skilled in the art recognizes that when radio signals are used, the door leaves 26 are permeable for them.

The transmitting / receiving device 16, alone or in conjunction with the control device 8, determines the authorization verification from the received radio signal, which is then used to determine the access authorization. Is the

Proof of eligibility valid, the user 20 can be granted access. If the proof of authorization is not valid, access is denied and the sliding door 4 is closed. Depending on whether the user 20 is authorized to access or not, this can be communicated to the user 20 in one embodiment by means of corresponding status information 23. In one embodiment, the notification takes place

Status information by the light projection device 13, which projects the status information 23 onto a projection surface. As indicated in FIG. 1 and FIG. 3, the projection surface can be provided on the sliding door 4; alternatively or additionally, the projection surface can be a floor surface (in the public zone 21) in front of the sliding door 4. As indicated in FIG. 4, the status information 23 can be represented by one or more pictograms 23a, for example by a closed or opened padlock. Further details on the light projection device 13 are disclosed in connection with FIGS. 3 and 4.

In one embodiment, the sliding door 4 does not open immediately after the user 20 has been recognized as having access by means of the camera device 3 and / or the detection device 14. Depending on the building situation, it may not be desirable, for example, for the sliding door 4 to open if the user 20 is recognized as having access authorization, but does not currently want access, but merely walks past the sliding door 4. Such a situation can exist, for example, in a building corridor with a number of adjacent rooms (e.g. offices, hospital rooms); The user 20 (e.g. supervisor, doctor) can in principle be authorized to access all rooms, but at a certain point in time the user 20 can actually only want access to one of these rooms.

The detection device 17 is used to recognize such an intention; In one exemplary embodiment, the intention can be expressed in that the user 20 has to perform a conscious action for this, for example has to go very close to the sliding door 4 or has to reach out a hand. As indicated in FIG. 1, the detection device 17 comprises, in one exemplary embodiment, an optical detection device that detects the conscious action. The

Detection device 17 detects, for example, that user 20 is stretching out his hand. In one embodiment, the detection device 17 comprises a light barrier which is designed such that the hand interrupts a light path between a light source and a light receiver. Further details according to a Exemplary embodiments of the detection device 17 are disclosed in connection with FIG. 3.

A person skilled in the art recognizes that as an alternative to a light barrier, the detection device 17 can have a sensor based on a different principle, for example a laser scanner, a camera, a radar sensor, a capacitive sensor, a time-of-flight sensor or the like.

Fig. 3 shows a schematic representation of an embodiment for the

Light projection device 13 which is used in the exemplary embodiment of the access control system 1 shown in FIG. 1. A part of the sliding door 4 is shown in cross section (y-z plane), the outer door leaf 26 (left) and the inner door leaf 26 (right) and the interior space in between being shown. The location of the user 20 is indicated by an eye, the user 20 looking at an operating compartment 25 which is present on the outer door leaf 26. In the exemplary embodiment shown, the operating compartment 25 is formed by a cutout in the outer door leaf 26 and extends into the interior of the sliding door 4. In the operating compartment 25 there is a projection surface 27 arranged at an angle in the vertical direction, for example it extends obliquely from the perspective of the user 20 above.

As indicated in FIG. 3, the light projection device 13 is arranged in the interior above the projection surface 27. From there, the status information 23 is projected onto the projection surface 27 and is visible to the user 20. An exemplary light path is indicated by an arrow pointing downwards and a horizontal arrow pointing outwards. In FIG. 3 it is also indicated that the status information 23 can be projected onto the floor (in the public zone 21) in front of the sliding door 4. In one embodiment, the light projection device 13 comprises a laser scanner, which uses laser radiation to display the status information 23 on the

Projection surface 27 is projected. Such laser scanners are commercially available, e.g. B. a microscanner from Bosch Sensortec GmbH, Germany.

In one embodiment, the light projection device 13 is designed to project an input field onto the projection surface 27, 27a. The input field can for example include a keyboard and / or symbols on which the user 20 z. B. Enter or select a PIN code or a symbol (e.g. a key symbol for unlocking or locking). In this embodiment, the light projection device 13 is designed similarly to a known device that is z. B. allows a computer keyboard or a piano keyboard to project onto a surface. In such a device, a laser projects the keyboard and a camera detects the finger movements. An evaluation program detected the coordinates of the

Finger movements and assigns them to corresponding keys and / or symbols. A device for the optical input of commands is z. B. disclosed in EP 0 554492 A1.

A light projection device 13 configured in this way makes it possible to determine the action of the user 20 on the basis of the "touched" field (button or symbol). A separate detection device 17 can u. U. omitted. Correspondingly, a field can also be "touched" when the input field is projected onto the floor in front of the sliding door 4; the "touching" can e.g. B. be done with one foot.

As mentioned above, the status information 23 can be represented by pictograms 23a, symbols and / or text. 4 shows exemplary icons 23a; from left to right, these indicate that the sliding door 4 is locked, that the sliding door 4 is unlocked, that certain actions are undesirable or prohibited (e.g. smoking or telephoning) and that access is not permitted. In one exemplary embodiment, a pictogram 23a or symbol can be supplemented by text; the text can, for example, be an instruction (e.g. "Please touch", "Please wait", "No access", "Do not disturb" or the like). . The name of the user 20, for example, can also be displayed as text. In addition to a pictogram 23a, in one

Embodiment an audible signal and / or one of the pictogram 23a

corresponding voice message can be initiated.

The size of the cutout or the control compartment 25 is chosen so that the

Status information 23 can be displayed in a size sufficient to be recognized by the user 20 when he is in front of the sliding door 4. In one

In the exemplary embodiment, the size of the section is also selected so that the user 20 can hold a hand or one or more fingers into it if he wishes to gain access. Depending on the area of application, the control compartment 25 can be designed to be vandal-proof. Is the control compartment 25 z. B. in the same way we designed the remaining surface of the door leaf 26, z. B. in the same shade and / or color pattern, the control compartment 25 optically fits into the door leaf 26; especially when switched off

Spruce projection device 23, the control compartment 25 is thus inconspicuous and inconspicuous and therefore of no interest to vandals. The control compartment 25 can be embedded in the material of the door leaf 26 (in one piece). An opening towards the for

Spruce projection device 23 can be closed with armored glass in order to protect the spruce projection device 23 from damage. The operating compartment 25 can also be cleaned easily, in particular as a one-piece design.

In one embodiment, the operating compartment 25 can be protected by a cover or locking mechanism. The top or closure mechanism can for example comprise an actuator and a flap or cover; the flap or cover, for example, closes the operating compartment 25 and thus prevents a hand or an object from being inserted into the operating compartment 25. The actuator can unlock and / or open the flap or panel if necessary so that the control compartment 25 can be used.

The detection device 17 is also shown in FIG. 3. Im shown

Embodiment, the detection device 17 is arranged so that the

The finger held in by the user 20 interrupt the Fichtweg of the Fichtschranke. In one embodiment, the spruce barrier is arranged on vertical side parts in the interior of the control compartment 25; the spruce path of the spruce barrier extends in this case from the perspective of the user 20 between a vertical left side part and a vertical right side part. The person skilled in the art recognizes that the spruce barrier can consist of more than one spruce source / spruce receiver pair. The person skilled in the art also recognizes that in one exemplary embodiment the detection device 17 can comprise a non-optical detection device (e.g. a proximity sensor).

FIG. 5 shows a schematic illustration of an exemplary embodiment of FIG

Activation device 19, which is, for example, directly connected to the control device 8. The activation device 19 comprises a proximity sensor 54, 56 and a processing device 58 connected to it, which communicates with the control device 8 connected is. The proximity sensor 54, 56 comprises a (first) conductive field plate 54 and an evaluation device 56 (DE), which is connected to the processing device 58. In one embodiment, the conductive field plate 54 is a copper plate which is arranged in the interior space on the inner door leaf 26. In this exemplary embodiment of the activation device 19, the field plate 54 and the evaluation device 56 form a capacitive sensor, the field plate 54 being an electrode of an open one

Represents capacitor. An electric field emanates from the electrode. If a material (user 20) with a dielectric constant greater than air penetrates the electric field, the capacitance of the field changes as a function of the penetration depth depending on the dielectric constant of this material. The evaluation device 56 measures this

The change in capacitance, and a detection signal DS resulting therefrom, is evaluated in the subsequent signal processing by the processing device 58.

The signal processing compares, for example, the resulting detection signal DS with a specified reference signal. The reference signal is used to determine the depth of penetration (i.e. the proximity of the user 20) from which the sliding door 4 is to be opened. In one exemplary embodiment, the resulting detection signal DS has a value that is higher the closer the user 20 or a part of the body (e.g. hand) is to the sliding door 4. If the value of the detection signal DS exceeds a value established by the reference signal, i. H. the user 20 is "close", generates the

Processing device 58 the activation signal AS. The control device 8 then initiates the movement of the sliding door 4.

Those skilled in the art will recognize that a (second) conductive field plate 60 can be arranged as shown in FIG. 5. In connection with the evaluation device 56, the field plate 60 forms a (second) proximity sensor in an analogous manner, which is also a capacitive sensor. In one exemplary embodiment, the conductive field plate 60 is likewise a copper plate which is arranged in the interior on the inner door leaf 26. The

Evaluation device 56 can, for. B. each have a signal input (port) for a field plate 54, 60 in order to determine the capacitance changes that can be measured. Depending on the configuration, the evaluation device 56 can have one or two (or more) separate signal outputs for the detection signal (s) DS. The

Processing device 58 is designed to process at least one of the detection signals DS. This results in different application cases: the field plates 54, 60 of these capacitive sensors can be arranged at different heights on an inside of the inner door leaf 26. A lower field plate 54, 60 can be provided, for example, to detect the approach of a pet (cat, dog) so that the sliding door 4 is opened for the pet, the opening width for the pet being able to be fixed. The person skilled in the art recognizes that in one embodiment the pet can additionally be equipped with an RFID transponder. To the

To open sliding door 4, z. B. the identifier of the RFID transponder can be recognized and the pet must stay close to the lower field plate 54, 60.

The capacitive sensors, which are formed by the field plates 54, 60 arranged in this way, can be activated individually for use, i. H. either or both of the capacitive sensors can be used. For example, if the user 20 does not have a pet but has a small child, only the upper capacitive sensor can be activated for safety reasons. Activation can take place, for example, in that only the upper field plate 54, 60 is connected to the evaluation device 56.

Alternatively to this, the lower field plate 54, 60 can also be connected to the evaluation device 56, but the evaluation device 56 is designed (programmed) not to process the associated detection signal DS. In one embodiment, the evaluation device 56 can be programmed in such a way that the detection signal DS associated with the lower field plate 54, 60 is only processed within a certain period of time, e.g. B. in a period during which the pet is allowed to leave the apartment.

In another application, the field plates 54, 60 of these capacitive sensors can be arranged essentially horizontally next to one another at a defined distance on the inside of the inner door leaf 26. By means of the capacitive sensors, which are formed by the field plates 54, 60 arranged in this way, the

Processing device 58 recognize, for example, a direction of movement of user 20 or of a body part (e.g. hand). The processing device 58 determines, for example, a time sequence of generated detection signals DS. If the movement takes place e.g. B. from left to right, first changes the electric field of the field plate 54, 60 arranged on the left and then the electric field of the field plate 54, 60 arranged on the right. The time sequence results from these field changes of the detection signals DS. A hand movement from left to right can, for example, cause the sliding door 4 to be opened.

In a further exemplary embodiment, several field plates can be arranged, for example, in a scheme of rows and columns, similar to a matrix, for example in the form of a 2 x 2, 3 x 3 or 3 x 4 matrix. The person skilled in the art recognizes that other arrangements are also possible. Each of these field plates produces a

Detection signal DS when the hand is near it. A gesture can be recognized by evaluating the time sequence of the detection signals DS.

Further functionalities of the access control system 1 are described by way of example below. The sensor device 10 shown in FIG. 1 is arranged in an area of the end face 30 of the sliding door 4, for example in an area of an upper (corner) edge of the sliding door 4. From this raised area, the

Sensor device 10 an optimized detection field 11 in the direction of the

Passage area 24 and the floor. An exemplary detection field 11 is shown in FIG. 1 (vertical) and in FIG. 2B (horizontal). The person skilled in the art recognizes that the horizontal detection field 11 can deviate from the shape shown in FIG. 2B, for example it can be narrower. In addition, the sensor device 10 in this (upper) area is better protected against contamination and damage (e.g. by

Vandalism).

According to an embodiment of the technology described here, a gesture is detected with the aid of the sensor device 10, which the user 20 executes when he wants to change the opening width W. A change may be desired because the user 20 needs a larger opening width, for example if he is carrying one or more larger objects (e.g. a package, suitcase) or if he is temporarily using an aid for locomotion (e.g. a wheelchair). uses. The one described here

Technology offers the user 20 the option of changing the opening width if necessary, in particular increasing it. In another exemplary embodiment of the technology, the opening width is selected and stored in such a way that the sliding door 4 initially only opens a gap. The gap is so narrow that the user 20 cannot pass. The opening width (gap width) can also be selected so that the user 20 who is located at the sliding door 4 is in the detection field 11 of the Sensor device 10 is located and sensor device 10 can detect a gesture by user 20. If the user 20 then performs a specified gesture, the sliding door 4 opens according to a specified opening width and the user 20 can pass.

The gesture can include, for example, a movement of the body and / or a body part, for example a movement of the head, an arm, a hand, a leg or a foot. The movement can be directional, e.g. Left, right, up, down, or combinations thereof. Those skilled in the art will recognize that another type of gesture can also be specified, e.g. B. one or more characters (e.g. hand and / or finger characters) or a sequence of such characters. The gesture can be defined individually for the user 20 or for a user group (for example family members or employees of a company).

In one embodiment, the sliding door system 5 can be designed that

To move sliding door 4 piece by piece, for example depending on certain gestures. A movement in the direction of the wall shell area 18 opens the sliding door 4 a little. A movement in the direction of the door post 2a closes it again a little. In addition, a movement carried out quickly can cause the sliding door 4 to open or close completely.

Using the sensor device 10, a (vertical) height of the user 20 can also be determined in one embodiment. In the present description, the term "height" is used for the extension of the user 20 in the direction of the z-axis; this although the size of people is usually stated. The height of the user 20 indicates a distance between the floor and a topmost point or area of the user 20. At the time of the determination (measurement time), the user 20 is on the floor essentially in the passage area 24. The sensor device 10 has a fixed and known distance from the floor (floor distance). In this situation, a

User distance between the sensor device 10 and the user 20 determined. The height H of the user 20 results from a difference between the floor distance and the user distance. In one embodiment, the sensor device 10 comprises at least one 3D camera. A person skilled in the art recognizes that the sensor device 10 can have more than one 3D camera and / or at least one additional sensor based on a different measuring principle. A camera based on the principle of time-of-flight measurement (TOF sensor) can be used as the 3D camera. The 3D camera comprises a light-emitting diode or laser diode device which, for example, emits light in the infrared range, the light being emitted in short pulses (for example several tens of nanoseconds). The 3D camera also comprises a sensor group made up of a number of light-sensitive elements. The sensor group is connected to a processing chip (e.g. a CMOS sensor chip) that determines the transit time of the emitted light. The processing chip simultaneously measures the distance to a number of target points in space in a few milliseconds. The 3D camera can also be based on a measuring principle in which the transit time of emitted light is recorded via the phase of the light. The phase position when the light is sent and when it is received is compared and the time elapsed or the distance to the reflecting user is determined from this. For this purpose, a modulated light signal is preferably emitted instead of short light pulses.

Further details on measurement principles are given, for example, in the following publications: "Fast Range Imaging by CMOS Sensor Array Through Multiple Double Short Time Integration (MDSI)", P. Mengel et al., Siemens AG, Corporate Technology Department, Munich, Germany, and " A CMOS Photosensor Array for 3D Imaging Using Pulsed Laser ", R. Jeremias et al., 2001 IEEE International Solid-State Circuits Conference, page 252. The use of a 3D camera for recognizing gestures is from the dissertation by Martin Haker," Gesture-Based Interaction with Time-of-Flight Cameras ", University of Lübeck, 2010, known.

The components mentioned (in particular control device 8,

Light projection device 13, camera device 3, detection device 17, activation device 19, detection device 14, sensor device 10,

Interface device 7, drive device 6) are, if in one

Embodiment available, arranged on the sliding door 4 and drive with the sliding door 4. These components can be arranged on the sliding door 4, in particular in its interior, flexibly and as required; the camera of the The camera device 3 is to be arranged, for example, in such a way that it can record an image of the user 20, in particular of his face, through an opening in the outer door leaf 26. The opening has a diameter of a few millimeters, for example 3-5 mm. The same applies to the light projection device 13, the detection device 17 and the activation device 19, or to their

Components; they are to be arranged in a user-friendly manner, for example at a height that allows perception and / or operation.

In one exemplary embodiment, the control device 8 is arranged in an area between the door leaves 26, for example in the area of one of the end faces 30

opposite rear side 31 of the sliding door 4. The rear side 31 of the sliding door 4 is not visible from the outside in one embodiment, because the sliding door 4 can be wider than the passage area 24 and the rear side 31 therefore also in the

the closed position of the sliding door 4 in the wall shell area 18 remains. The drive device 6 and the interface device 7 can also be arranged in this area. The electrical connections 32, 34 are accordingly arranged between the door leaves 26 and are not visible from the outside. However, the exemplary embodiments of the technology described here are not restricted to this arrangement of the components mentioned as an example.

FIG. 6 shows a schematic illustration of an exemplary embodiment of FIG

Control device 8 for the access control system shown in FIG. 1 1. The

Control device 8 has an interface device 44 (I / O) which is electrically connected to a processor 40 (mR) and has several connections 43, 46, 48, 50, 52, 53, 55 for input and output signals. The connection 46 is connected to the drive device 6, the connection 48 with the sensor device 10, the connection 50 with the detection device 14 and the connection 52 via the interface device 7 with the building management system 12. In addition, the connection 43 is connected to the

Activation device 19 is connected, the connection 53 to the detection device 17 and the connection 55 to the light projection device 13.

The control device 8 also includes a memory device 36 which is electrically connected to the processor 40. In the exemplary embodiment shown, the storage device 36 has a storage area 38 for a database (DB) and a Memory area 42 for one or more computer programs (SW) for operating the sliding door system 5. Depending on the configuration of the access control system 1, operating the sliding door system 5 includes one or more of the mentioned functionalities, for example opening the sliding door 4 as a function of the identified user 20, the display the status information 23, the detection of a gesture (from outside or inside) and the direction of movement (from inside). Depending on the configuration, the operation can also include determining a height H of the user 20. The

Computer program can be executed by processor 40.

The database stores a data record for the user 20 who is authorized to access the restricted-access zone 22. The stored data record is also referred to below as a user profile. The user profile includes user-specific data, e.g. B. Name, information on proof of authorization (key number, PIN code,

Access code, including biometric data) and possibly time

Access restrictions (e.g. access from Monday to Friday, from 7:00 a.m. to 8:00 p.m.). If several users 20 are authorized to access the restricted-access zone 22, the database stores a user profile for each user 20. As an alternative to creating a user profile in the database of the storage device 36, the user profile can be created in a database of the building management system 12, with the

Access control system 1 can access this database by means of the communication network 28.

According to the technology described here, it is additionally indicated in each user profile up to which width W (see FIG. 2B) the sliding door 4 is to be opened.

In addition, it is indicated which gesture or which gestures the user 20 can use to influence the operation of the sliding door 4. In one embodiment, the height H of the user 20 is also specified. The height H of the user 20 may be a maximum height or a height range because the height u. U. can vary depending on the type of shoes and headgear for the user 20. In one embodiment, the length (in the y direction) can also be specified for each user 20. The height H and the length (if any) are for access control

Plausibility parameters, as stated elsewhere in this description.

With an understanding of the principal system components described above and their functionalities, a description of an exemplary method for operating the access control system 1 based on the situation shown in FIG. 1 follows in connection with FIG. 7. The description is made with reference to the user 20 who, coming from the restricted-access zone 22, moves in the direction of the sliding door 4 in order to leave the restricted-access zone 22. The method shown in FIG. 4 begins in a step S1 and ends in a step S4. The person skilled in the art recognizes that the division into these steps is exemplary and that one or more of these steps can be divided into one or more substeps or that several of the steps can be combined into one step.

In a step S2, when the user 20 approaches the sliding door 4, the activation device 19 generates an activation signal AS when the user 20 approaches the sliding door up to a specified distance. The specified distance can be selected depending on the spatial conditions in the building; it can be a few 10 centimeters, for example. The distance is to be chosen so that the user 20 has to take a conscious action to initiate the opening, the user 20 has to z. B. deliberately approach the sliding door 4 or stretch your hand out. This makes it possible to prevent the sliding door 4 from opening (for example because the user 20 was unconsciously in the vicinity or was walking past the sliding door 4), although this is not desired.

When an activation signal AS is present, the

Drive unit 6 of sliding door system 5 controlled by control device 8. This causes the sliding door 4 to move from the closed position into an open position.

As stated above, this is generated by a proximity sensor 54, 56, 60

The detection signal DS is a function of the distance between the user 20 and the sliding door 4. A reference signal is stored in the access control system 1 and is assigned to a specified distance from the sliding door 4. The reference signal can be in the

Processing device 58 be stored. In one embodiment, the processing device 58 compares a detection signal DS generated by a proximity sensor 54, 56, 60 with the stored reference signal. The

Processing device 58 generates the activation signal AS when the comparison shows that the distance of the user 20 is equal to the specified distance.

In one exemplary embodiment, the opening can take place in stages, for example to prevent the sliding door 4 from being released for passage (e.g. being opened completely) if the user 20 is unintentionally too close to the sliding door 4. In this exemplary embodiment, a first opening width can be selected such that the sliding door 4 initially only opens a gap in a first open position. The gap is so narrow that the user 20 cannot pass. The opening width (gap width) can also be selected such that the user 20 who is located at the sliding door 4 is in the detection field 11 of the sensor device 10. If the user 20 then performs a specified gesture, the sliding door 4 opens into a second open position according to a specified opening width and the user 20 can pass. If no gesture is recognized after a specified period of time, the sliding door 4 closes again.

Depending on the configuration of the access control system 1, the determined gesture can be recognized by the activation device 19 or the sensor device 10.

For this z. B. the proximity sensors arranged essentially horizontally next to one another or in the form of a matrix or their field plates 54, 60 can be used. This allows z. B. a hand movement from left to right (or vice versa) can be recognized. Gesture recognition by the sensor device 10 is disclosed elsewhere in this description.

In one embodiment, the control device 8 controls the drive unit 6 in order to move the sliding door 4 back into the closed position after the user 20 has passed. In one embodiment, the closing takes place after a fixed period of time has elapsed after the sliding door 4 has reached the open position. It is assumed here that the user 20 has passed the passage area 24 during the specified period of time. In another exemplary embodiment, the closure takes place immediately after the user 20 has stepped through the passage area 24. Passing through can e.g. B. be detected by means of the sensor device 10.

The person skilled in the art recognizes that the sliding door 4 according to a fixed opening width W can be opened. The opening according to the defined opening width W can take place both when leaving the restricted-access zone 22 and when entering the restricted-access zone 22. The following statements therefore relate to leaving and entering the restricted-access zone 22.

The choice of the opening width W can be based on various motivations. According to one motivation, the opening width W is selected and stored in such a way that the user 20 can comfortably pass through the sliding door 4 or the passage area 24 without feeling restricted or cramped. According to another motivation, the user's 20 desire for increased security determines the choice of

Opening width W. The opening width W is selected so that the sliding door 4 initially only opens a gap, which, however, is too narrow for the user 20.

Controlled by the processor device 40 and taking into account the im

User profile stored opening width W, the drive device moves the sliding door 4 until the width W is reached. As a result, the sliding door 4 is moved from the essentially closed position into a more or less open position. A part of the sliding door 4 is pushed into the wall shell area 18 of the door frame 2, as shown for example in FIG. 2B.

As stated above, a gesture by the user 20 who is on the sliding door 4 in the detection field 11 of the sensor device 10 is recognized by the sensor device 10. The gesture is recognized according to a method which is described, for example, in the above-mentioned dissertation by Martin Haker.

As a function of the recognized gesture, deviations from the stored

Opening width W the drive unit 6 can be controlled. In one

In the exemplary embodiment, this means that the sliding door 4 is opened wider than the opening width W appropriate for most everyday situations, so that the user 20 can also pass through with larger objects (e.g. parcel, suitcase) or a wheelchair.

In another exemplary embodiment, this means that the sliding door 4 is only opened so far that the user 20 can pass when the correct gesture is recognized has been. If the gesture is not recognized as valid for the user 20, possibly not even after it has been repeated several times, the sliding door 4 is moved back into the closed position in one exemplary embodiment. In such a case, for example, a reset procedure (reset) can be initiated in which the user 20 must identify himself via another communication medium in order to, for. B. set a new gesture or initiate a remote opening. In addition, an alarm signal can be generated, which is transmitted to a person responsible for the restricted-access zone 22 (tenant, owner, building manager, etc.), for example as a text message via e-mail or SMS.

An alarm signal can also be generated by the control device 8 if the height H of the user 20 located in the passage area 24, as determined by the sensor device 10, deviates by a specified degree from the height H or height area stored for this user 20. The degree of the deviation can be established in such a way that it is expressed that the determined height H does not match the user 20 at all (is plausible). If an expected altitude H (based on the user profile) deviates significantly from the currently determined altitude, it can be concluded from this, for example, that it is not the user 20 to whom the

Proof of Entitlement is assigned. It could be, for example, that an unauthorized person is in possession of the authorization (e.g. mobile phone, RFID tag) and is trying to gain access instead of the user 20.

In the access control system 1, a set of rules can be established which indicates whether and which action should be initiated after an alarm signal. These actions can be situation-specific, i. H. It depends on what time (day or night) and on what day (working day or weekend, vacation time) the alarm signal is generated. Exemplary actions can be: an audible and / or visually perceptible alarm (siren, warning light), automatic notification of security personnel (police or private security service) and automatic notification of the person responsible for the restricted-access zone 22 (tenant, owner,

Building manager etc.). The person skilled in the art recognizes that these actions can also be combined.

In one embodiment, the control device 8 with an additional Be designed functionality that a dwell time of the user 20 in

Passage area 24 is determined and compared with a specified dwell time. This functionality is similar to a functionality for a security or elevator door, according to which a signal tone sounds if the door is kept open for too long or blocked. The specified dwell time can also be stored in the data record of the user 20. If the specified dwell time is exceeded, the alarm signal can also be generated in this case. With this functionality, for example, the risk can be reduced that an unauthorized person tries to block the opened sliding door 4 or to manipulate the sensor device 10.

In a further exemplary embodiment, the control device 8 can be designed with a further functionality. This functionality determines a length of the user 20 (in the y direction) in the passage area 24 and compares this with a defined, stored user length area. The sensor device 10, for example designed as a 3D camera with a TOF sensor, has the detection field 11 shown in FIGS. 1 and 2B. In conjunction with the control device 8, the length of the user 20 can thus be determined. From an image recording z. B. a contour of the user 20 is recognized and its length can be determined from this. The fixed

User length range can also be stored in the data record of user 20. If the specified user length range is exceeded, the

Alarm signal can be generated.

Referring again to the positions of the sliding door 4 shown in FIGS. 2A-2C, the following is a description of an exemplary embodiment of the

Sliding door system 5. FIGS. 2A-2C each show a schematic representation of a top view of the sliding door system 5. In each of these top views, the components of the sensor device 10 (S), control device 8 (DC) and drive device 6 (M) encompassed by the sliding door 4 are shown ; other components, such as B. the interface device 7 and its connection to the building management system 12 are not shown for reasons of illustration. The components, in particular the drive device 6 and the control device 8, are arranged inside the sliding door 4, in particular between the door leaves 26. The wall shell area 18 with the structure for receiving the sliding door 4 in the open position is also shown in FIGS. 2A-2C. The sensor device 10 is arranged on the end face 30. The arrangement is selected such that the electromagnetic radiation (light or radio waves) can propagate unhindered in the direction of the passage area 24 during operation. The

Sensor device 10 can, for. B. be arranged in the region of an upper guide rail or inserted into a recess on the end face 30 and through a

Radiation-permeable cover must be protected from damage and dirt. The electrical connection 32 (Fig. 1) between the sensor device 10 and the

The control device 8 and the electrical connection 34 (FIG. 1) run inside the sliding door 4, for example between the door leaves 26.

The illustrated embodiment of the sliding door 4 is based on a principle that is similar to a principle known from EP 2876241 A1. This describes a sliding door system in which two opposing door surfaces are coupled to an actuator which moves the door surfaces towards or away from one another. In relation to the sliding door system 5 according to the technology described here, this means that the two door leaves 26 have a leaf spacing d1 in the closed position of the sliding door 4. During the opening of the sliding door 4, the two door leaves 26 are moved towards one another by an actuator 9 (FIGS. 2A-2C) so far that they have a leaf spacing d2 which is dimensioned such that the sliding door 4 is in its fully or partially open position ( 2B and 2C) has such a small thickness that it fits into the receiving structure of the wall shell area 18. The sheet spacing dl is greater than the sheet spacing d2. When the sliding door 4 is pushed out of the wall shell area 18, the two door leaves 26 are moved away from one another

(spread), so that the sliding door 4 assumes a fixed thickness in the closed state (FIG. 2A). The thickness is determined in such a way that the outer sides of the two door leaves 26 in the closed position are essentially flush with the outer sides of the wall shell region 18 or its cladding. As a result, an essentially smooth-surface finish is achieved on both wall sides in the door area.

In one embodiment, the sliding door system 5 has a guide device on a door cross member which supports the sliding door 4 and guides it on its way between the closed position and the open position. The sliding door 4 has a complementary device on its upper edge. The guide device and the complementary devices work together when the drive device 6 causes the sliding door 4 to move and acts on the complementary device; they can, for example, form a system with a telescopic extension. The

Drive device 6 can, for example, comprise a motorized or pneumatic sliding drive which acts on the telescopic extension.

In one exemplary embodiment, the two door leaves 26 are moved towards or away from one another by the actuator 9. The actuator 9 can comprise a spreading device which is activated mechanically, electrically or electromechanically. The spreading device is designed to move the door leaves 26 towards one another when the

Sliding door 4 is to be opened, and to move them away from each other when the sliding door 4 is to be closed. Those skilled in the art will recognize that others may instead

Spreading devices can be provided, for example pressurized cylinders.

Claims

1. System (1) for controlling access to a restricted-access zone (22) in a building, comprising,

a sliding door system (5) which comprises a door frame (2) and a sliding door (4) which can be displaced in the door frame (2) between a closed position and an open position by a drive device (6), the door frame (2) having a passage area (24 ) and a wall shell region (18) which at least partially receives the sliding door (4) in an open position;

a control device (8) which is arranged on the sliding door (4) and is communicatively connected to the drive device (6), the control device (8) being designed to move the sliding door (4) between the closed position and an open position Taxes; and

an activation device (19) which is arranged in an interior space of the sliding door (4) and is communicatively connected to the control device (8), the activation device (19) being designed to generate an activation signal (AS) when a user (20 ), which wishes to leave the restricted-access zone (22), comes close to a fixed distance from the sliding door (4), and the control device (8) is designed to move the sliding door (4) from when an activation signal (AS) is present from the closed position to an open position.

2. System (1) according to claim 1, wherein the sliding door (4) is one of the

The inner door leaf (26) facing the restricted-access zone (22) and an outer door leaf (26) facing away from the restricted-access zone (22), between which the interior space extends, the activation device (19) detecting an approach to the inner door leaf (26) .

3. System (1) according to any one of the preceding claims, wherein the

Activation device (19) comprises a first proximity sensor (54, 56) and a processing device (58) connected thereto, the processing device (58) being communicatively connected to the control device (8).

4. System (1) according to claim 3, wherein the first proximity sensor (54, 56) comprises a first capacitive proximity sensor (54) with a first conductive field plate.

5. System (1) according to claim 5, wherein the first conductive field plate is arranged in the interior on the inner door leaf (26).

6. System (1) according to one of claims 4-5, wherein the activation device (19) comprises a second proximity sensor (56, 60), which with the

Processing device (58) is connected.

7. System (1) according to claim 6, wherein the second proximity sensor (56, 60) comprises a second capacitive proximity sensor (60) with a second conductive field plate, wherein the second conductive field plate is arranged in the interior space on the inner door leaf (26).

8. System (1) according to one of claims 6-7, in which the first proximity sensor (54, 56) and the second proximity sensor (56, 60) are designed to detect an approach of the user (20) and in each case a detection signal ( DS), the processing device (58) being designed to process at least one of the detection signals (DS).

9. System (1) according to claim 8, wherein the first field plate and the second

Field plate are arranged at different heights on the inner door leaf (26).

10. System (1) according to claim 8 or 9, wherein the first and the second field plate are arranged substantially horizontally next to one another at a fixed distance.

11. System (1) according to one of the preceding claims, wherein the sliding door (4) comprises an actuator (9) which is designed to have two spaced apart, substantially parallel door leaves (26) of the sliding door (4) in the closed position of the Sliding door (4) in a first position with a first sheet spacing (dl) and in the open position of the sliding door (4) in a second position with a second sheet spacing (d2), the first sheet spacing (dl) being greater than the second Sheet spacing (d2).

12. A method for operating a system (1) for controlling access to a restricted-access zone (22) in a building according to any one of claims 1-11, wherein the system (1) comprises a sliding door system (5) and a control device (8) for comprising the sliding door system (5), the method comprising:

Generating a first activation signal (AS) by a

Activation device (19) which is arranged in an interior space of a sliding door (4) of the sliding door system (5) and is communicatively connected to the control device (8), the activation device (19) being designed to generate the first activation signal (AS) when a user (20) who has the wishes to leave the restricted-access zone (22) up to a specified distance from the sliding door (4); and

Control of a drive unit (6) of the sliding door system (5) by the control device (8) when the first activation signal (AS) is present in order to initiate a movement of the sliding door (4) from a closed position to a first open position.

13. The method according to claim 12, further comprising comparing a detection signal (DS) generated by a proximity sensor (54, 56, 60), which is a function of the distance of the user (20) to the sliding door (4), with a reference signal, wherein the Reference signal is assigned to the specified distance, and wherein the first

Activation signal (AS) is generated when the comparison shows that the distance of the user (20) is equal to the specified distance.

14. The method according to claim 13, further comprising determining a first point in time at which a first detection signal (DS) is determined, the first detection signal (DS) being generated by a first proximity sensor (54, 56, 60), and determining a second Point in time at which a second detection signal (DS) is determined, the second detection signal (DS) from a second proximity sensor (54, 56, 60), which is essentially horizontal at a specified distance next to the first proximity sensor (54, 56, 60 ) is arranged to determine a direction of movement.

15. The method according to any one of claims 12-14, further comprising generating a second activation signal when the user (20) executes a defined gesture, and the control device (8) activates the drive unit (6) when the second activation signal (AS) is present to cause the sliding door (4) to move from the first open position to a second open position.