EP3899883A1

EP3899883A1 - Access control system with sliding door with object monitoring function

Info

Publication number: EP3899883A1
Application number: EP19809525.9A
Authority: EP
Inventors: Paul Friedli
Original assignee: Inventio AG
Current assignee: Inventio AG
Priority date: 2018-12-21
Filing date: 2019-12-03
Publication date: 2021-10-27
Anticipated expiration: 2039-12-03
Also published as: WO2020126483A1; CA3116944A1; SG11202104135PA; EP3899883B1; AU2019407082B2; US20220074255A1; CN113168743B; AU2019407082A1; CN113168743A

Abstract

A system for controlling an access to an access-restricted zone (22) in a building has 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 displaced in the door frame (2) between a closed position and an open position by a drive unit (6) actuated by the control device (8, 10). The door frame (2) has a pass-through region (24) and a wall panelling region (18), which receives at least some of the sliding door (4) in the open position. The sliding door (4) has an end face (30), which in the open position points in the direction of the pass-through region (24). The control device (8, 10) has a processor unit (8) and a sensor unit (10), wherein the sensor unit (10) is arranged on the end face (30) of the sliding door (4), and the processor unit (8) is arranged in an interior and is electrically connected to the sensor unit (8) and the drive unit (6). The control device (8, 10) is designed to generate an alarm signal if a height (H), determined by the sensor unit (8), of an object (20) located in the pass-through region (24) deviates from a height range stored for said object (20).

Description

Access control system with sliding door with object monitoring function

description

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

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

Access control systems can be designed in a wide variety of ways in order to grant or deny people access to a restricted zone. The design can relate, for example, to the way in which people (users) have to identify themselves as authorized, e.g. B. with a key, a magnetic, chip or RFID card or a mobile electronic device (e.g. mobile phone). WO 2010/112586 A1 describes an access control system in which an access-authorized user is shown an access code on a display on a mobile phone carried. If the user holds the mobile phone to a camera so that it can capture the access code shown, 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 people are granted or denied access, for example through doors, locks or barriers. For example, it is known that an electronic lock is arranged on a door, on 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 monitors by sensors whether and which objects are moving through a door. For object monitoring using

The device has an infrared image recording and infrared pulse lighting, a stereometric object detection device consisting of a radiation source and an image recording device, which is fixed stationary near a wall or a door frame. The object recognition device determines the geometrical

Dimensions of an object (human, car) to determine how far the door must be opened for the object to pass. This is to ensure the comfort and security of the passing object, for example, a running or feel safe when driving through the door.

The systems mentioned relate to different requirements of access control and related designs of the access control systems. In addition to these known requirements, there are further requirements, for example due to changing living habits or living conditions (e.g. condensed living in apartments in a city), including a need for increased security and increasing automation of and in buildings. There is therefore a need for an access control system technology that meets these requirements, with access control in particular

Security needs has to be taken into account without negatively affecting 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 one

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

Sliding door system has a door frame and one in the door frame between a closed position and an open position by one of the

Control device controlled drive unit sliding sliding door. The door frame has a passage area and a wall shell area, which at least partially receives the sliding door in the open position. The sliding door has an end that points in the open position towards the passage area. The

Control device has a processor unit and a sensor unit, the

Sensor unit is arranged on the front of the sliding door and the

Processor unit arranged in an interior of the sliding door and with the

Sensor unit and the drive unit is electrically connected. The control device is designed to generate an alarm signal when a height of an object located in the passage area determined by the sensor unit deviates from a height range stored for this object.

Another aspect of the technology relates to a method of operating a system for controlling access to an restricted area in a building. The system has a sliding door system and a control device for the sliding door system. According to the method, a drive unit of the sliding door system is replaced by the Control device controlled to release a passage area of a door frame for an object by moving a sliding door from a substantially closed position into an open position, a part of the sliding door sliding into a wall shell area of the door frame. The sliding door has an end that points in the open position towards the passage area. A sensor unit arranged on the front is replaced by a processor unit

Control device activated. The sensor unit is designed to determine a height of an object located in the passage area. An alarm signal is generated by the control device when the height of the object located in the passage area determined by the sensor unit deviates from a height range stored for this object.

The technology described here creates an access control system that enables a plausibility check to be made based on the height of the object. This means that it is not only checked whether the object is authorized to access, which leads to the sliding door being opened, but also whether the determined height also fits the object that is passing through the passage area. The effectiveness of the access control can thereby be improved, in particular in situations in which the object is not a person but, for example, a pet or a robot. In one exemplary embodiment, the technology uses a recognition device which is arranged on the sliding door system or in its vicinity and is communicatively connected to the control device. The recognition device is designed to record and verify a credential provided by the object. It is advantageous that the type of proof of authorization and, accordingly, the recognition device can be selected depending on the requirements in the building. The detection device can, for example, a transmitting and receiving device for radio signals, a detection device for a biometric feature, a detection device for an optical code, a reading device for a magnetic stripe card or a chip card, or a keyboard or a touch-sensitive screen for manual entry of a password or a mechanical one or electronic door lock.

The proof of authorization enables the access authorization of the Object. In one embodiment, if the proof of authorization is valid for the object, the processor unit determines a data record in a storage device in which the proof of authorization is assigned to an opening width of the sliding door and the height range. The data record can be managed by a person responsible for the restricted zone (tenant, owner, building manager, etc.).

In one exemplary embodiment, the sliding door system has an interface device which is arranged and configured on the sliding door and has data on it

Send and / or receive building management system. The

The building management system can be arranged in the building or at a distance from it.

In one embodiment, the drive unit is arranged on the sliding door. This means that not only the processor unit and the sensor unit are arranged on the sliding door, but also the drive unit. This allows maintenance and / or

Repairs can be carried out with relatively little effort, for example the sliding door can be removed in whole or in part 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.

Another advantage of the technology described here is that its use is not limited to any particular type of sliding door system. In one

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

According to the technology described here, the access control system can be equipped with additional functionalities to increase the possibilities for

Reduce manipulation and / or circumvention of access control. In one

In the exemplary embodiment, the control device can keep the object in the Determine the passage area and compare it with a specified length of stay. The specified dwell time can also be stored in the data record of the object. If the specified dwell time is exceeded, the alarm signal can also be generated in this case. In a further exemplary embodiment, the control device can determine a length of the object (in the y direction) in the passage area and compare it with a defined stored object length range. The specified one

Object length range can also be stored in the data record of the object. If the specified object length range is exceeded, the alarm signal can also be generated in this case.

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

Figure 1 is a schematic representation of an exemplary situation in a building with an access control system according to an embodiment.

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

FIG. 2B shows 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 from FIG. 2A, the sliding door being in an open position; FIG.

Fig. 3 is a schematic representation of an embodiment of a

Control device for the access control system shown in Fig. 1; and FIG. 4 shows a flowchart of an exemplary embodiment of a method for operating an access control system.

Fig. 1 is a schematic representation of an exemplary situation in a building with an access control system 1, the sliding door system 5 and one

Control device 8, 10 includes. The sliding door system 5 is inserted into a building wall and represents a physical barrier between a public zone 21 and a restricted zone 22. With reference to the xyz coordinate system shown in FIG. 1, the building wall extends in a plane which is defined by the x and z - axes are clamped. The restricted zone 22 can e.g. B. an apartment, a business or other space in a building. The

Sliding door system 5 can be built into an interior wall (for a building interior

Access control, e.g. B. Access to an apartment) or inserted into an outer wall of the building (for controlling access to the building). As explained in more detail elsewhere in this description, the sliding door system 5 opens a sliding door 4 for an object 20 authorized to access, while it remains closed for an object 20 not authorized to access. The object 20 can be a human, an animal or, as indicated in FIG. 1, a robot. In this description, the term “building” is understood to mean, for example, residential and / or commercial buildings, sports arenas, airports, ships. In the situation shown in FIG. 1, the technology described here can be advantageously used in order to operate the access control system 1 with the highest possible level of security, the object 20 nevertheless being able to be comfortably granted access to the restricted zone 22. Short and exemplary

In summary, the operation of the access control system 1 takes place according to one embodiment as follows: The technology recognizes the object 20 as

authorized to access and opens the sliding door 4 for the object 20 in the direction of the x-axis. However, the sliding door 4 is only opened as far as is specified in a user profile for the object 20. In addition, the technology described here determines a height H of the object 20 in the direction of the z-axis and checks whether this height H fits the height also specified in the user profile. If this is not the case, one can

Security measure (e.g. an alarm) can be initiated. Such a situation can arise, for example, when the sliding door 4 is opened for an object 20 of low height (e.g. child, pet (dog, cat), robot) and an unauthorized person opens the sliding door at the same time or shortly before or shortly thereafter 4 happens.

Exemplary configurations of the technology are described in more detail below.

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 that forms a cavity that is dimensioned to accommodate the sliding door 4. The passage area 24 is the area in the building wall in which a passage in the direction of 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 jamb) and the opposite wall shell area 18. Depending on the design, the wall shell area 18 is accommodated in a cavity of the building wall, or the wall shell area 18, possibly after cladding, can be regarded as part of the building wall.

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. With reference to the x-y-z coordinate system shown in FIG. 1, the sliding door 4 is moved along the x-axis. In the open position, the sliding door 4 is, 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 FIG. 1, in which the sliding door 4 (and accordingly the passage area 24) more or less is less open, d. H. an end face 30 of the sliding door 4 has 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 substantially parallel door leaves 26 (each on an inside and an outside of the sliding door 4). The door leaves 26 are at a distance from one another (in the y direction), so that there is an interior space between the door leaves 26 in which system components and insulation material for sound and

Fire protection can be arranged. The door leaves 26 are connected to one another in the region of the end face 30, as shown for example in FIG. 2A. Each of the door leaves 26 extends in parallel in the x-z plane. Further details of the sliding door 4 are disclosed elsewhere in this description.

Fig. 1 also shows a control device 8, 10, a detection device 14, an interface device 7 and a drive unit 6 (M), which in one

Embodiment components of the sliding door system 5 are. In one

In the exemplary embodiment, the sliding door system 5 is connected to a building management system 12 (BM); In the exemplary embodiment shown in FIG. 1, 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. The expert realizes that this Building management system 12 may be wholly or partly outsourced to an IT infrastructure for so-called cloud computing (colloquially also referred to as "cloud"). This includes, for example, the storage of data in a remote data center, but also the export of programs that are not installed locally but remotely. Depending on the configuration, a certain functionality can be provided, for example, in the control device 8, 10 or via the “cloud”. For this purpose, for example, a software application or program parts thereof can be executed in the "cloud". The control device 8, 10 then, if necessary, accesses this infrastructure via the interface device 7 in order to execute the software application.

The communication network 28 may include an electronic bus system in an execution system. In one exemplary embodiment, the electrical connection of the sliding door system 5, including its supply with electrical energy, takes place via the interface device 7. The 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 in order to to communicate with the building management system 12, for example in connection with a determination and verification of access authorizations, if this is done centrally by the building management system 12.

The control device 8, 10 comprises a processor unit 8 (DC) and a sensor unit 10, which is connected to the processor unit 8 by an electrical connection 32. The processor unit 8 is also connected to the drive unit 6 and the interface device 7 by means of an electrical connection 34. 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 processor unit 8 is also connected to the detection device 14. The recognition device 14 is designed to detect an authorization proof from the object 20, on the basis of which the access control system 1 can determine the access authorization of the object 20. The proof of authorization can be, for example, in the form of a physical key, a manually entered password (e.g. a PIN code), a biometric feature (e.g. fingerprint, iris pattern,

Voice / voice characteristics) or an access code recorded by a magnetic, chip or RFID card or an electronic device (based on NFC, Bluetooth or cellular). The object 20 presents the proof of authorization if it wishes access to the restricted zone 22.

According to the forms mentioned, which the proof of authorization can have, the proof of authorization can be presented in different ways, for example by deliberate manual action (e.g. entering a PIN code or holding out an RFID card) or by walking towards the door to come to the detection device 14 in radio range (for example for establishing an RFID or Bluetooth connection). The detection device 14 can be arranged on the sliding door 4 or in the vicinity thereof, for example it can be arranged on an outside of the sliding door 4, so that it can record the proof of authorization when the object 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 reading device for a

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

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 recognition device 14, each for a different type of proof of authorization, or that a recognition device 14 is designed for several types of proof of authorization.

In the exemplary embodiment shown in FIG. 1, the recognition device 14 detects a proof of authorization which a radio device 21 of the object 20 or a radio device 21 carried by the object 20 emits as a radio signal. The radio signal can be in accordance with a known standard for radio communication (e.g. RFID,

WLAN / WiFi, NFC, Bluetooth) can be sent. Accordingly, the

Detection device 14 configured to receive such a radio signal; in Fig. 1 For this purpose, a transmitting / receiving device 16 and an antenna connected to it are shown.

The transmitting / receiving device 16, alone or in conjunction with the processor unit 8, determines the authorization proof from the received radio signal

is then used to determine the access authorization. Is the

Proof of eligibility valid, object 20 is granted access; in this case the processor unit 8 controls the drive unit 6, which moves the sliding door 4 in the direction of the open position. If the proof of authorization is not valid, the sliding door 4 remains closed and locked.

The sensor unit 10 is arranged on 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 unit 10 has 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). In addition, the sensor unit 10 is better in this area from contamination and damage (e.g. by

Vandalism).

According to the technology described here, a (vertical) height of the object 20 is determined with the aid of the sensor unit 10. In the present description, the term “height” is used for the extension of the object 20 in the direction of the z axis; this although the object 20 can also be a person according to the technology described here (the size of the person is usually specified). The height of the object 20 (human, animal or robot) here indicates a distance between the floor and an uppermost point or area of the object 20. At the time of the determination (time of measurement), the object 20 is essentially on the floor in the passage area 24. The sensor unit 10 has a fixed and known distance from the floor (floor distance). In this situation, according to one

Embodiment determines an object distance between the sensor unit 10 and the object 20. The height H of the object 20 results from a difference between the ground distance and the object distance. In one exemplary embodiment, the sensor unit 10 comprises a 3D camera. A camera based on the principle of. Can be used as a 3D camera

Time of flight measurement (TOF sensor) is based. The 3D camera comprises a light-emitting diode or laser diode unit which, for example, emits light in the infrared range, the light being emitted in short pulses (for example several tens of nanoseconds long). The 3D camera also includes 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 whole 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 transmitted and when it is received is compared, and the elapsed time or the distance from the reflecting object is determined therefrom. For this purpose, a modulated light signal is preferably emitted instead of short light pulses. More details about

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. Those skilled in the art will recognize that, as an alternative to such a 3D camera, another device for determining the object distance is used can, for example, a device based on electromagnetic waves in the radio wavelength range (radar).

The components mentioned (control device 8, 10, recognition device 14, interface device 7, drive unit 6) are arranged on the sliding door 4 and travel with the sliding door 4. In one embodiment, the processor unit 8 is arranged in an area between the door leaves 26, for example in the area of a rear side 31 of the sliding door 4 opposite the front side 30. In an embodiment, the rear side 31 of the sliding door 4 is not visible from the outside because the sliding door 4 is wider than the passage area 24 and the rear side 31 therefore remains in the closed position of the sliding door 4 in the wall shell area 18. The drive unit 6 and the interface device 7 can also be arranged in this area. The electrical connections 32, 34 are accordingly arranged between the door panels 26 and are not visible from the outside. However, the technology described here is not limited to this exemplary arrangement of the components.

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

Processor unit 8 for the access control system 1 shown in FIG. 1

Processor unit 8 has an interface device 44 (I / O) which is electrically connected to a processor 40 (mR) and has a plurality of connections 46, 48, 50, 52 for input and output signals. The connection 46 is connected to the drive unit 6, the connection 48 to the sensor unit 10, the connection 50 to the detection device 14 and the connection 52 to the interface device 7

Building management system 12.

The processor unit 8 also includes a memory device 36 which is electrically connected to the processor 40. In the embodiment shown, the

Storage device 36 includes a storage area 38 for a database (DB) and a storage area 42 for one or more computer programs (SW) for operating the sliding door system 5. In one embodiment, the operation of the

Sliding door system 5, opening the sliding door 4 as a function of the recognized object 20 and determining the height H of the object 20. The computer program can be executed by the processor 40.

The database stores a data record for the object 20 which is authorized to access the restricted zone 22. The stored data record is also referred to below as the user profile. The user profile includes object-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 objects 20 are authorized to access the restricted zone 22, the database stores a user profile for each object 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 Access control system 1 can access this database by means of the communication network 28.

According to the technology described here, each user profile also specifies up to which opening width W (see FIG. 2B) the sliding door 4 can be opened and the height H of the object 20. The height H of the object 20 can be a maximum height or a range of heights because, for example, a cat can walk through the passage area 24 with its head lowered or its head raised and / or its tail raised. In one exemplary embodiment, the length (in the y direction) of each object 20 can also be specified. The height H and the length (if present) are plausibility parameters, as explained elsewhere in this description.

This data can be organized like a table, as shown in the following table. The table shows four user profiles for four objects 20 (human, cat, dog, robot). Each object 20 is assigned an identifier (ID) which is linked to the width W and the height H. For example, if the recognition device 14 recognizes the identifier ID = 78, the user profile No. 4 for a robot is accessed. In this case, the sliding door 4 is opened approximately 50 cm, and the height determined with the aid of the sensor unit 10 is compared with the height H = 50 stored for the robot. The determined height must lie in a height range that matches the stored height of the object 20, i. H. it must be plausible that it is actually object 20. Instead of a specific height H, in one exemplary embodiment, one or more (all) objects 20 can be found in the table

Height range must be specified. The person skilled in the art recognizes that the values given in the table are exemplary and can deviate from real situations.

With the understanding of the basic system components described above and their functionalities, a description is given below in connection with FIG. 4 an exemplary method for operating the access control system 1 based on the situation shown in FIG. 1. The description is made with reference to the object 20 (robot), which, coming from the public zone 21, moves in the direction of the sliding door 4 in order to get into the restricted zone 22. The radio device 21 of the object 10 is ready for use. The method shown in FIG. 4 begins in a step S1 and ends in a step S6. The person skilled in the art recognizes that the division into these steps is exemplary and that one or more of these steps is divided into one or more substeps or that several of the steps can be combined into one step.

In a step S2, the recognition device 14 receives one

Proof of Entitlement of Object 20. The proof of entitlement can take one of the forms mentioned above. The processor unit 40 checks whether for the

Proof of authorization, a user profile is created in the database 38. If this check reveals that object 20 is authorized to access, object 20 is as

recognized with access authorization.

In a step S3, the drive unit 6 of the sliding door system 5 is controlled by the control device 8, 10, in particular by its processor unit 8, in order to open the sliding door 4. As a result, the passage area 24 for the object 20 is released by moving the sliding door 4 from the essentially closed position into the open position. Part of the sliding door 4 slides into the wall shell area 18 of the door frame 2, as shown for example in FIG. 2B.

Controlled by the processor unit 40 and taking into account the width W stored in the user profile, the drive unit moves the sliding door 4 until the width W is reached.

In a step S4, the sensor unit 10 arranged on the end face 30 is activated by the processor unit 8. As stated above, the sensor unit 10 determines the (vertical) height of the object 20 located in the passage area 24.

In a step S5, an alarm signal is generated by the control device 8, 10 when the height H, determined by the sensor unit 10, of the object 20 located in the passage area 24 is greater than the height H or stored for this object 20 Height range deviates by a specified degree. The degree of the deviation can be determined in such a way that it is expressed that the determined height H does not match the object 20 at all (is plausible). If, for example, a height H of 180 cm is determined for a pet instead of an expected height H of 50 cm, it can be concluded from this that not only the pet but also a person goes through the opened sliding door 4. It could also be the case, for example, that an unauthorized person takes a pet's proof of authorization (e.g. RFID tag) from a pet in order to try to gain access instead. Similarly, an expected height H of 170 cm does not match a determined height H of 100 cm. This can happen, for example, if a child uses the credentials of a parent. Although the child is an authorized person, the parent may It may not be desirable that the child of the

Proof of authorization served.

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

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

In one exemplary embodiment, the control device 8, 10 can be designed with an additional functionality, which extends the dwell time of the object 20

Passage area 24 is determined and compared with a defined 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 or blocked for too long. The specified dwell time can also be stored in the data record of the object 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 of an unauthorized person blocking the opened sliding door 4 can be reduced or manipulate the sensor unit 10.

In a further exemplary embodiment, the control device 8, 10 can be designed with a further functionality. This functionality determines a length of the object 20 (in the y direction) in the passage area 24 and compares it with a defined stored object length area. The sensor device 10,

configured as a 3-D camera with a TOF sensor, for example, has the detection field 11 shown in FIGS. 1 and 2B. In conjunction with the processor unit 8, the length of the object 20 can thus be determined. From an image acquisition z. B. a contour of the object 20 is recognized and the length thereof can be determined therefrom. The defined object length range can also be stored in the data record of the object 20. If the specified object length range 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 pretends a lower height when the sliding door 4 is open, but increases its length in the process, for example crawling on the floor.

Referring again to the positions of the sliding door 4 shown in FIGS. 2A-2C, a description of an 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. The components sensor unit 10 (S), processor unit 8 (DC) and drive unit 6 (M) encompassed by the sliding door 4 are shown in each of these top views ; for the sake of illustration they are

Interface device 7 and its connection to the building management system 12 are not shown. The drive unit 6 and the processor unit 8 are arranged within the sliding door 4, in particular between the door panels 26. Of 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 unit 10 is arranged on the end face 30. The arrangement is selected such that the electromagnetic radiation (light or radio waves) can propagate freely in the direction of the passage area 24 during operation. The sensor unit 10 can e.g. B. inserted into a recess on the end face 30 and protected from damage and dirt by a radiation-permeable cover. The electrical connection 32 (FIG. 1) between the sensor unit 10 and the

The processor unit 8 and the electrical connection 34 (FIG. 1) run inside the sliding door 4, for example between the door panels 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) to such an extent 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 region 18. The blade spacing dl is larger than the blade 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 defined 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 sides of the wall in the door area. In one exemplary embodiment, the sliding door system 5 has a guide device on a door cross member which carries the sliding door 4 and guides it on its way between the closed position and the open position. For this purpose, the sliding door 4 has a complementary device on its upper edge. The guide device and the complementary device cooperate when the drive unit 6

Moves the sliding door 4 and acts on the complementary device; for example, they can form a system with a telescopic extension. The

Drive unit 6 can be, for example, a motorized or pneumatic one

Include sliding drive, which acts on the telescopic extension.

In one exemplary embodiment, the two door leaves 26 are actuated by the actuator 9 moved towards or away from each other. The actuator 9 can comprise a spreading device that is activated mechanically, electrically or electromechanically. The spreader 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 one another when the sliding door 4 is to be closed. Those skilled in the art will recognize that others instead

Spreading devices can be provided, for example pressure-actuated cylinders.

Claims

1. System (1) for controlling access to an access restricted zone (22) in a building, the system (1) being a sliding door system (5) and a

Control device (8, 10) for the sliding door system (5) comprises

wherein the sliding door system (5) comprises a door frame (2) and a sliding door (4) displaceable in the door frame (2) between a closed position and an open position by a drive unit (6) controlled by the control device (8, 10), the Door frame (2) has a passage area (24) and a wall shell area (18) which at least partially receives the sliding door (4) in the open position, and wherein the sliding door (4) has an end face (30) which is in the open position towards the passage area (24); the control device (8, 10) a processor unit (8) and a

Has sensor unit (10), wherein the sensor unit (10) is arranged on the end face (30) of the sliding door (4) and the processor unit (8) is arranged in an interior of the sliding door (4) and with the sensor unit (8) and the Drive unit (6) is electrically connected, and wherein the control device (8, 10) is designed to generate an alarm signal when a height (H) of an object (20) located in the passage area (24) from the sensor unit (8) is determined deviates from a height range stored for this object (20).

2. System (1) according to claim 1, further comprising a detection device (14) which is arranged on the sliding door system (5) or in its vicinity and communicatively connected to the control device (8, 10), the detection device (14) being designed to record and verify a credential provided by the object (20).

3. System (1) according to claim 2, wherein the processor unit (8) is configured to determine a data record in the authorization proof for the object (20) in a storage device (36) in which the authorization proof an opening width (W) of the sliding door (4) and the height range is assigned.

4. System (1) according to claim 3, wherein the detection device (14) a transmitting and receiving device (16) for radio signals, 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, or a keyboard or

Touch-sensitive screen for manual entry of a password or a mechanical or electronic door lock.

5. System (1) according to any one of the preceding claims, further comprising an interface device (7) which is arranged on the sliding door (4) and is designed to send and / or receive data to a building management system (12).

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

Drive unit (6) is arranged on the sliding door (4).

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

Processor unit (8) is configured, a residence time of the object (20) in

To determine the passage area (24) and to compare it with a specified dwell time in order to generate the alarm signal when the specified dwell time is exceeded.

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

Processor unit (8) is designed to determine a length of the object (20) and to compare it with a stored object length range in order to generate the alarm signal when the determined length of the object (20) deviates from the object length range stored for the object (20).

9. System (1) according to any one of the preceding claims, wherein the sliding door (4) comprises an actuator (9) which is designed, door leaves (26) of the sliding door (4) in the closed position of the sliding door (4) in one to position the first position with a first blade spacing (dl) and in the open position of the sliding door (4) in a second position with a second blade spacing (d2), the first

Blade spacing (dl) is greater than the second blade spacing (d2).

10. A method for operating a system (1) for controlling access to an access-restricted zone (22) in a building according to one of claims 1-9, The system (1) comprising a sliding door system (5) and a control device (8, 10) for the sliding door system (5), the method comprising:

Actuating a drive unit (6) of the sliding door system (5) by the control device (8, 10) to move a passage area (24) of a door frame (2) for an object (20) by moving a sliding door (4) from an

To release substantially closed position in an open position, wherein part of the sliding door (4) pushes into a wall shell area (18) of the door frame (2) and wherein the sliding door (4) has an end face (30), which in the open position in the direction the passage area (24) has;

Activation of a sensor unit (10) arranged on the end face (30) by a processor unit (8) of the control device (8, 10), the sensor unit (10) being designed to have a height (H) of an object () in the passage area (24). 20) to be determined; and

The control device (8, 10) generates an alarm signal when the height (H) of the object (20) located in the passage area (24), as determined by the sensor unit (10), is saved by an object (20) for this object

Height range deviates.

11. The method according to claim 10, further comprising detecting and checking by the object (20) shown proof of authorization by the

Detection device (14).

12. The method according to claim 11, further comprising, in the case of authorization proof valid for the object (20), the processor unit (8) determining a data record in which the authorization proof is assigned to an opening width (W) of the sliding door (4) and the height range.

13. The method according to any one of the preceding claims 10 - 12, further comprising determining a residence time of the object (20) in the passage area (24) by the processor unit (8), comparing the determined residence time with a specified residence time and generating the alarm signal, if the specified Dwell time is exceeded.

14. The method according to any one of the preceding claims 10-13, furthermore comprising determining a length of the object (20) by the processor unit (8), comparing the determined length with a stored object length range and generating the alarm signal if the determined length of the object (20) deviates from the object length range stored for the object (20).