MONITORING SYSTEM OF A DOOR CLOSER

Abstract

System (24) for monitoring safety-relevant functions of a door closer (10) for the leaf (12) of a door or window serving as a fire protection closure, comprising a sensor (26) assigned to the door closer (10) for detecting predefinable operating parameters of the door closer (10) and a control and / or evaluation unit (28) connected to the sensor (26) for monitoring compliance with predefinable safety functions of the door closer (10) by means of the operating parameters detected by the sensor (26), the sensor technology (26) includes: - at least one position sensor to detect the position of the wing (12) acted upon by the door closer (10), the sensor system (26) further includes: - at least one speed sensor to detect the speed of the leaf (12) acted upon by the door closer (10), and / or - at least one acceleration sensor to detect the acceleration of the wing (12) acted upon by the door closer (10), characterized in that the control and / or evaluation device (28) is designed to validate the signals supplied by the position sensor by including the signals supplied by the speed sensor and / or the acceleration sensor.

Description

[0001] The invention relates to a system for monitoring safety-relevant functions of a door closer for the sash of a door, window or the like, in particular serving as a fire protection closure.

[0002] Door closers for doors or windows are generally known and can be designed with hydraulic and / or regenerative damping. In a known design, such a door closer typically comprises a housing in which a working piston is slidably guided and interacts with an output shaft via a gear mechanism. A linkage or a sliding arm can be fixedly mounted on the output shaft. The door closer can optionally be mounted on a leaf of the door or window or on a fixed frame. Accordingly, the linkage or sliding arm bears against the frame or the leaf, thereby establishing a connection between the pivoting movement of the leaf and the door closer. Particularly in the case of floor-mounted door closers, the output shaft of the door closer can also be directly coupled to the pivot axis of a swinging leaf.

[0003] Door closers are frequently installed on fire-resistant closures such as fire or smoke control doors to ensure that, in the event of a fire, the door or door closes securely, preventing the spread of smoke or fire. Door closers typically include a mechanical energy storage device that is charged when the door leaf opens and discharged when it closes. The closing speed can be dampened, for example, hydraulically. The closing speed is usually adjusted via hydraulic valves, and the closing torque is set by pre-charging the mechanical energy storage device, which may contain a spring unit. Door closers are often self-contained systems that do not require an external power source. In certain cases, regenerative damping of the closing speed may also be incorporated.

[0004] Door closers for fire or smoke protection doors are subject to stringent safety requirements, most of which are defined in norms and standards. However, various factors can lead to one or more of these safety requirements no longer being met during the door closer's service life. For example, in cold weather, the viscosity of the oil typically used as a damping medium decreases, thus increasing the closing time. The opposite effect occurs in warm weather. If the door closer loses oil as its damping medium, the corresponding door leaf will close at least partially without damping. If, for example, the teeth of the intended locking mechanism break, or the fitting itself breaks, the door closer will no longer close at all. It is also frequently observed, for instance in hotels, that guests unhook the levers associated with door closers, rendering the door closer inoperable.It can also happen that the door leaf of a fire door is held in the open position with a wire or wooden wedge, which means that the door remains open in the event of a fire. Furthermore, a broken spring, a change in the spring tension, friction, or similar issues can result in a lack of closing torque.

[0005] US 2014 / 0 182 206 A1 describes a door system and, in particular, a method and a system for monitoring the condition of doors, suitable for predicting the need for maintenance or adjustment of the door.

[0006] WO 2015 / 175 614 A1 describes a door drive which, among other things, has a graphical user interface that allows the user to control the door via a selection menu.

[0007] US 2013 / 0 186 001 A1 concerns a door control system with an automatic diagnostic routine. Depending on the sensor information received, limit counts are started and stopped in the control unit.

[0008] DE 10 2011 055 491 A1 teaches a servo door closer comprising an output shaft, a drive mechanism operatively connected to the output shaft, a mechanical energy storage device acting on the drive mechanism for storing closing energy for the door leaf, a motor / generator unit operatively connected to the output shaft, and an electrical energy storage device electrically connected to the motor / generator unit for storing support energy for the door leaf.

[0009] The invention is based on the objective of providing a system for monitoring safety-relevant functions of a door closer for the leaf of a door, window, or the like, particularly one serving as a fire-resistant closure, in which the aforementioned problem is eliminated. In particular, the aim is to ensure the most comprehensive and reliable monitoring possible of the relevant safety functions of the door closer.

[0010] According to the invention, the problem is solved by a system with the features of claim 1. Preferred embodiments of the system according to the invention are described in the dependent claims, the present description, and the drawing.

[0011] The system according to the invention for monitoring safety-relevant functions of a door closer for the leaf of a door, window or the like, in particular serving as a fire protection closure, comprises a sensor system assigned to the door closer for detecting predefinable operating parameters of the door closer and a control and / or evaluation device connected to the sensor system for monitoring compliance with predefinable safety functions of the door closer based on the operating parameters detected by the sensor system. the sensor technology (26) includes: - at least one position sensor to detect the position of the wing (12) acted upon by the door closer (10), the sensor system (26) further includes: - at least one speed sensor to detect the speed of the leaf (12) acted upon by the door closer (10), and / or - at least one acceleration sensor to detect the acceleration of the wing (12) acted upon by the door closer (10).

[0012] This training results in the creation of an intelligent door closer or system that enables comprehensive and reliable monitoring of the relevant safety functions of the door closer. The operating parameters of the door closer, as detected by the sensors, can be analyzed or evaluated by the control and / or evaluation unit to verify whether and to what extent the specified safety functions of the door closer are actually being fulfilled.

[0013] The operating parameters and / or monitoring results recorded by the sensors are preferably logging, signaling, in particular displaying, and / or making available for retrieval by the control and / or evaluation unit.

[0014] Advantageously, the control and / or evaluation unit also provides maintenance information and / or generates error messages, depending on the monitoring results.

[0015] This allows all essential safety functions of the door closer to be monitored, and necessary maintenance information and any error messages can be provided. The control and / or evaluation unit can log everything, for example with a timestamp, in a log or event log file. Furthermore, compliance with standard-required parameters can be monitored.

[0016] The system also conveniently includes a communication interface for remote diagnostics. This allows the operating parameters recorded by the sensors and / or the monitoring results obtained after evaluation by the control and / or evaluation unit to be collected centrally.

[0017] The safety functions of the door closer, which are monitored by the control and / or evaluation unit, can include, in particular, a predefined maximum closing time of the door leaf actuated by the door closer. This allows, for example, monitoring of whether an open door is closed by the door closer within a certain time, so that in the event of a fire the door is brought into the closed position in a timely manner.

[0018] Furthermore, the safety functions of the door closer, which are monitored by the control and / or evaluation unit, can also include a predefined closing torque and / or a predefined closing torque profile. This allows monitoring to ensure that the door closer closes the door with the appropriate closing torque to guarantee safe closure in the event of a fire. For example, it can be verified whether this is the case even when encountering headwinds, friction, and / or pressure differences.

[0019] Alternatively or additionally, the safety functions of the door closer to be monitored by the control and / or evaluation unit can also include, in particular, a predefinable minimum closing time of the leaf actuated by the door closer.

[0020] The system according to the invention, or the intelligent door closer, can in particular also monitor whether a door closes too quickly during normal operation, so that no one is injured by the closing door leaf.

[0021] According to a practical embodiment of the system according to the invention, the control and / or evaluation unit comprises a cycle counter for counting the opening and / or closing cycles of the door leaf actuated by the door closer. The count result of such a cycle counter can be used, in particular, for maintenance purposes.

[0022] It is particularly advantageous if the operating parameters detected by the sensors can be at least partially and continuously analyzed by the control and / or evaluation unit. Such continuous evaluation or analysis of the operating parameters detected by the sensors by the control and / or evaluation unit correspondingly increases the reliability of the monitoring of the safety functions.

[0023] Alternatively or additionally, the control and / or evaluation unit and associated sensors can also be designed to record the operating time of the door closer. This can then be used, in particular, for maintenance purposes.

[0024] The control and / or evaluation unit can include at least one microcontroller or similar device. In this case, the operating parameters detected by the sensors can be evaluated or analyzed, in particular, by the microcontroller.

[0025] According to a preferred practical embodiment of the system according to the invention, the sensor technology and / or the control and / or the evaluation device is at least partially integrated into the door closer.

[0026] It is particularly advantageous if the sensor system and / or the control and / or evaluation unit is at least partially modular and, in particular, designed as a retrofittable module. This allows the sensor system and / or control and / or evaluation unit to be easily retrofitted even to an already installed door closer.

[0027] The sensor system may include at least one or more of the following sensors: - at least one proximity and / or motion sensor, such as in particular an active infrared sensor or the like; - at least one sensor to record the time; - at least one sensor to detect the closing torque generated by the door closer; - at least one pressure sensor for detecting the pressure in a damping medium contained in the housing of the door closer, in particular a hydraulic fluid.

[0028] The acceleration sensor can thus be used, for example, to detect the accelerated movement of a door leaf. Such an acceleration sensor is particularly easy to implement when the door closer is mounted on the door leaf. An active infrared sensor or a sensor based on another presence technology can also be used to detect the accelerated movement of the door leaf. Such a sensor can be used, for example, when the door closer is mounted on the frame. In the case of hinge-side mounting of the door closer, the door leaf passes through the sensor field. With hinge-side and opposite-hinge mounting, it must be taken into account that passersby can also cross the sensor field.

[0029] The sensor for recording the time can, for example, include a real-time clock or be defined by the clock frequency of the microcontroller.

[0030] The position sensor can be used, for example, to detect the absolute position of a door leaf. It can comprise, for instance, a potentiometer located on the output or closing shaft of the door closer, a magnetic distance sensor located on the piston guided in the housing of the door closer, or similar devices.

[0031] The speed sensor can, for example, comprise a tachogenerator with a gearbox. The sensor for detecting the closing torque generated by the door closer can, for example, comprise a strain gauge for measuring spring tension, a strain gauge in a guide rail that guides a sliding arm coupled to the output shaft of the door closer to measure the lateral force between the sliding block and the guide rail, and / or the like. The pressure sensor can, for example, measure the pressure in a damping medium contained in the door closer housing, e.g., hydraulic oil.

[0032] The operating parameters detected by the sensors can be continuously, temporarily, or periodically evaluated or analyzed by the control and / or evaluation unit or the microcontroller.

[0033] The control and / or evaluation device is expediently designed to determine the speed of the wing and, from this, the current closing time of the wing by differentiating the position of the wing actuated by the door closer as detected by the position sensor.

[0034] It is particularly advantageous if the control and / or evaluation device is designed to check whether the recorded or determined closing time of the leaf actuated by the door closer lies within a time interval defined by a predefinable minimum closing time and a predefinable maximum closing time.

[0035] Advantageously, the control and / or evaluation unit is also designed to count the opening and / or closing cycles of the wing actuated by the door closer, based on the signals supplied by the position sensor.

[0036] According to a preferred practical embodiment of the system according to the invention, the control and / or evaluation device is designed to monitor a respective fire protection function and / or the closing speed of the leaf actuated by the door closer, based on the signals supplied by the position sensor.

[0037] According to a further advantageous practical embodiment of the system according to the invention, the control and / or evaluation device is designed to combine the signals supplied by the position sensor with the sensor signals supplied by the acceleration sensor and / or with the proximity and / or motion sensor, in particular for the detection of a breakage of an output or closing axis of the door closer, a breakage in the door or window fitting, manipulations on the door closer and / or on the fitting and / or the like.

[0038] If, for example, the control and / or evaluation unit or the microcontroller does not detect a change in the position of the output shaft or closing axis of the door closer, the connection between the door closer and the door leaf must be interrupted.

[0039] According to a further advantageous embodiment of the system according to the invention, the control and / or evaluation unit is designed to determine the acceleration of the door leaf actuated by the door closer by two-fold differentiation of the position detected by the position sensor and / or by single differentiation of the velocity of the door leaf actuated by the door closer during closing, as detected by the velocity sensor, in order to obtain a measure of the closing torque. Thus, the torque is proportional to the product of the inertia of the door leaf and the acceleration of the door leaf. The control and / or evaluation unit or the microcontroller can therefore also detect, in particular, a change in the closing torque.

[0040] However, the control and / or evaluation unit or the microcontroller can also directly measure the closing torque using the sensor for detecting the closing torque generated by the door closer.

[0041] According to a further advantageous practical embodiment of the system according to the invention, the control and / or evaluation device is designed to determine the dwell time of the wing after an opening in a rest position on the basis of the signals supplied by the sensor for recording the time, in order in particular to detect a finding of the wing in the open position.

[0042] If the dwell time is too long, it can be assumed that the wing is held in its open position, i.e., blocked, by a wedge, a rope or the like.

[0043] According to a further advantageous embodiment of the system according to the invention, the control and / or evaluation device is designed to detect a finding of the wing in the open position on the basis of the pressure of a damping medium of the door closer detected by the pressure sensor.

[0044] The pressure sensor can therefore, for example, detect when a hydraulic door closer locks the door leaf in its open position, since in this case the hydraulic fluid or similar substance, such as oil, which is intended as a damping medium, is usually without pressure.

[0045] As already mentioned, the result of the cycle counter and the determined operating time can also be used for maintenance purposes.

[0046] The door closer may in particular include a mechanical energy storage device, such as a spring unit or the like, which is charged when the wing is opened and discharged when the wing is closed.

[0047] The door closer can be equipped with hydraulic and / or regenerative damping. The sensors, as well as the control and / or evaluation unit or the microcontroller, can be powered by the mains and / or a battery and / or accumulator. As already explained, the system according to the invention is applicable not only to hydraulically damped but also to regeneratively damped door closers. In the case of a regeneratively damped door closer, the power supply can be at least partially provided directly or, if necessary, with accumulator buffering from the generator voltage.

[0048] The control and / or evaluation unit can log all or only a portion of the received information. A notification can be generated in the event of detected tampering, errors, outstanding maintenance, and / or similar issues. This can be done, for example, via at least one LED and / or a buzzer in the door closer, or via a radio signal and / or an electrical signal that can be transmitted to a maintenance center.

[0049] As already mentioned, the door closer monitoring can be at least partially integrated or built into the door closer, or it can be implemented as a retrofit module for already installed door closers. According to the invention, an intelligent door closer is thus created. Remote monitoring is also conceivable, so that data can be collected centrally.

[0050] Due to the monitoring according to the invention, regular maintenance of the door closer can be dispensed with and maintenance can instead only be carried out when necessary.

[0051] The invention will be explained in more detail below with reference to exemplary embodiments and the drawing; in this drawing: Fig. 1 a schematic representation of an exemplary embodiment of a door closer mounted on a leaf of a door, the safety-relevant functions of which can be monitored by means of a system according to the invention, Fig. 2 a schematic representation of an exemplary embodiment of a door closer mounted on a frame, the safety-relevant functions of which can be monitored by means of a system according to the invention, and Fig. 3 a schematic representation of the sensor technology and / or the control and / or evaluation device of an exemplary embodiment of the system according to the invention.

[0052] The Fig. 1 and Fig. Figure 2 shows, purely as examples, a door closer 10 for one leaf 12 of a door. The door closer is designed according to... Fig. 1 on wing 12 and according to the Fig. 2 is mounted on the frame 14 of the door. However, the door closer 10 can also be used for the sash of a window, a hinged or smoke protection flap, or the like. The respective door closer 10 can include a mechanical energy storage device, such as a spring unit, which is charged when the sash 12 is opened and discharged when the sash 12 is closed. In addition, the door closer 10 can be equipped with hydraulic and / or regenerative damping.

[0053] An output shaft 16 rotatably mounted in the housing of the door closer 10 can be connected to a lever arrangement 18 serving for power transmission, which, for example, includes a sliding arm 22 guided in a slide rail 20 (see in particular Fig. 1) or may include a linkage. In particular, in the case of floor-mounted door closers, the output shaft 16 of the door closer 10 may also be directly coupled to the pivot axis of the leaf 12.

[0054] The relevant leaf 12 may in particular be a fire-resistant closure. In the case of a door leaf, this may therefore be leaf 12 of a fire door.

[0055] The system according to the invention serves to monitor safety-relevant functions of such a door closer 10 for the leaf 12 of a door, window, or the like, in particular one serving as a fire protection closure. It comprises sensor 26 associated with the door closer 10 (see figure). Fig. 3) for recording predefinable operating parameters of the door closer 10 and a control and / or evaluation unit 28 connected to the sensor 26 for monitoring compliance with predefinable safety functions of the door closer 10 on the basis of the operating parameters recorded by the sensor 26.

[0056] The operating parameters and / or monitoring results recorded by the sensor 26 can be logged, signaled, and in particular displayed, and / or made available for retrieval by the control and / or evaluation unit 28. Depending on the monitoring results, the control and / or evaluation unit 28 can also provide maintenance information and / or generate alerts.

[0057] In addition, the monitoring system 24 can have a communication interface 30 (see below). Fig. 3) for remote diagnosis or the like.

[0058] The safety functions of the door closer 10 to be monitored by the control and / or evaluation unit 28 may, for example, include a predefinable maximum closing time of the leaf actuated by the door closer 10, a predefinable closing torque and / or a predefinable closing torque profile, a predefinable minimum closing time of the leaf 12 actuated by the door closer 10 and / or the like.

[0059] Alternatively or additionally, the control and / or evaluation unit 28 can, for example, also include a cycle counter for counting the opening and / or closing cycles of the wing 12 actuated by the door closer 10.

[0060] The operating parameters detected by sensor 26 can be at least partially continuously analyzed or evaluated by the control and / or evaluation unit 28. However, in principle, only intermittent analysis or evaluation, for example periodically, is also conceivable.

[0061] The control and / or evaluation unit 28 and associated sensors 26 can also be configured to record the operating time of the door closer 10. The control and / or evaluation unit 28 can, in particular, comprise at least one microcontroller.

[0062] As in Fig. As shown in Figure 1, the sensor 26 and / or the control and / or evaluation unit 28 can be at least partially integrated into the door closer 10. However, the sensor 26 and / or the control and / or evaluation unit 28 can also be designed, at least partially, as a modular system and, in particular, as a retrofittable module.

[0063] The sensor system 26 of the monitoring system 24 according to the invention comprises at least one position sensor for detecting the position of the wing 12 actuated by the door closer 10, wherein the sensor system 26 further comprises: - at least one speed sensor to detect the speed of the leaf 12 actuated by the door closer 10, and / or - at least one acceleration sensor to detect the acceleration of the wing 12 acted upon by the door closer 10.

[0064] In particular, it may include at least one or more of the following sensors: - at least one proximity and / or motion sensor, such as an active infrared sensor or similar; - at least one sensor to record the time; - at least one sensor for detecting the closing torque generated by the door closer 10; - at least one pressure sensor for detecting the pressure in a damping medium contained in the housing of the door closer 10, in particular hydraulic fluid such as oil.

[0065] The control and / or evaluation device 28 can be designed to determine the speed of the wing 12 and from this the current closing time of the wing 12 by differentiating the position of the wing actuated by the door closer 10 detected by the position sensor.

[0066] Alternatively or additionally, the control and / or evaluation unit 28 can also be designed to check whether the recorded or determined closing time of the leaf 12 actuated by the door closer 10 lies within a time interval defined by a predefinable minimum closing time and a predefinable maximum closing time.

[0067] Alternatively or additionally, the control and / or evaluation unit 28 can also be designed to count the opening and / or closing cycles of the wing 12 actuated by the door closer 10 on the basis of the signals supplied by the position sensor.

[0068] Alternatively or additionally, the control and / or evaluation unit 28 can also be configured to monitor a respective fire protection function and / or the closing speed of the leaf 12 actuated by the door closer 10, based on the signals supplied by the position sensor. If necessary, the closing leaf 12 can thus also be slowed down by the control and / or evaluation unit 28.

[0069] According to the invention, the control and / or evaluation unit 28 is designed to process the signals supplied by the position sensor by incorporating the signals supplied by the speed sensor and / or the acceleration sensor. This correspondingly increases the security of the monitoring.

[0070] Furthermore, the control and / or evaluation unit 28 can also be designed, in particular, to combine the signals supplied by the position sensor with the sensor signals supplied by the acceleration sensor and / or with the proximity and / or motion sensor, especially for the detection of a breakage of an output or closing axis of the door closer 10, a breakage in the door or window fitting, manipulations of the door closer 10 and / or the fitting and / or the like.

[0071] Alternatively or additionally, such a design of the control and / or evaluation device 28 is also conceivable in which it determines the acceleration of the leaf 12 actuated by the door closer 10 by twofold differentiation of the position detected by the position sensor and / or by single differentiation of the speed detected by the speed sensor of the leaf 12 actuated by the door closer 10 during closing, in order to obtain a measure for the closing torque.

[0072] Alternatively or additionally, the control and / or evaluation unit 28 can also be designed to determine the dwell time of the wing 12 after an opening in a rest position based on the signals supplied by the sensor for recording the time, in order in particular to detect a finding of the wing 12 in the open position.

[0073] Alternatively or additionally, for example, such a design of the control and / or evaluation unit 28 is conceivable in which it detects a finding of the wing 12 in the open position on the basis of the pressure of a damping medium of the door closer 10 detected by the pressure sensor.

[0074] As already mentioned, the respective door closer 10 can, for example, include a mechanical energy storage device such as a spring unit or the like, which is charged when the leaf 12 is opened and discharged when the leaf 12 is closed. The respective door closer 10 can, for example, be equipped with hydraulic and / or regenerative damping.

[0075] The monitoring system 24, the sensor 26, and the control and / or evaluation unit 28 can be powered via the mains and / or a battery and / or accumulator. The system 24 according to the invention is applicable to both hydraulically damped and generator-damped door closers. In the case of generator-damped drives, the power supply can also be provided, at least partially, directly from the generator voltage or, if necessary, with accumulator buffering. The control and / or evaluation unit 28, or the microcontroller, can log all or selectively only a portion of the information. In the event of detected tampering, a fault, outstanding maintenance, and / or the like, the control and / or evaluation unit 28, or the microcontroller, can generate a corresponding message.This can be achieved, for example, via at least one LED or a buzzer in the door closer 10 and / or, for example, also by means of a radio or electrical signal to a maintenance center. Remote diagnostics are also possible, for example, via the aforementioned communication interface 30. Due to the monitoring according to the invention, regular maintenance can be dispensed with and maintenance can instead only be carried out as needed. Reference symbol list 10 door closers 12 wings 14 frame 16 Output shaft 18 Lever arrangement 20 sliding rail 22 sliding arm 24 monitoring system 26 Sensors 28 Control and / or evaluation unit 30 Communication interface

Claims

[1] System (24) for monitoring safety-relevant functions of a door closer (10) for the leaf (12) of a door or window serving as a fire protection closure, comprising a sensor (26) assigned to the door closer (10) for detecting predefinable operating parameters of the door closer (10) and a control and / or evaluation unit (28) connected to the sensor (26) for monitoring compliance with predefinable safety functions of the door closer (10) by means of the operating parameters detected by the sensor (26), the sensor technology (26) includes: - at least one position sensor to detect the position of the wing (12) acted upon by the door closer (10), the sensor system (26) further includes: - at least one speed sensor to detect the speed of the leaf (12) acted upon by the door closer (10), and / or - at least one acceleration sensor to detect the acceleration of the wing (12) acted upon by the door closer (10), characterized by , that the control and / or evaluation device (28) is designed to validate the signals supplied by the position sensor by including the signals supplied by the speed sensor and / or the acceleration sensor. [2] System according to claim 1, characterized by , that the operating parameters and / or monitoring results recorded by the sensor (26) can be logged, signaled, in particular displayed, and / or made available for retrieval by the control and / or evaluation unit (28). [3] System according to claim 1 or 2, characterized by , that maintenance information can be provided and / or error messages can be generated by the control and / or evaluation unit (28) depending on the monitoring results. [4] System according to at least one of the preceding claims, characterized by , that it includes a communication interface (30) for remote diagnostics. [5] System according to at least one of the preceding claims, characterized by , that the safety functions of the door closer (10) to be monitored by the control and / or evaluation unit (28) include a predefinable maximum closing time of the leaf (12) acted upon by the door closer (10). [6] System according to at least one of the preceding claims, characterized by , that the safety functions of the door closer (10) to be monitored by the control and / or evaluation unit (28) include a predefinable closing torque and / or a predefinable closing torque profile. [7] System according to at least one of the preceding claims, characterized by, that the safety functions of the door closer (10) to be monitored by the control and / or evaluation unit (28) include a predefinable minimum closing time of the leaf (12) acted upon by the door closer (10). [8] System according to at least one of the preceding claims, characterized by , that the control and / or evaluation unit (28) includes a cycle counter for counting the opening and / or closing cycles of the wing (12) actuated by the door closer (10). [9] System according to at least one of the preceding claims, characterized by that the operating parameters detected by the sensor (26) can be at least partially continuously analyzed by the control and / or evaluation unit (28). [10] System according to at least one of the preceding claims, characterized by , that the control and / or evaluation unit (28) and associated sensors (26) are designed to record the operating time of the door closer (10). [11] System according to at least one of the preceding claims, characterized by that the control and / or evaluation unit (28) includes at least one microcontroller. [12] System according to at least one of the preceding claims, characterized by , that the sensor (26) and / or the control and / or evaluation unit (28) is at least partially integrated into the door closer (10). [13] System according to at least one of the preceding claims, characterized by that the sensor technology (26) and / or the control and / or evaluation unit (28) is at least partially modular and in particular designed as a retrofittable module. [14] System according to at least one of the preceding claims, characterized by , that the sensor system (26) includes at least one or more of the following sensors: - at least one proximity and / or motion sensor, such as an active infrared sensor; - at least one sensor to record the time; - at least one sensor to detect the closing torque generated by the door closer (10); - at least one pressure sensor for detecting the pressure in a damping medium, in particular hydraulic fluid, contained in the housing of the door closer (10). [15] System according to claim 14, characterized by , that the control and / or evaluation device (28) is designed to determine the speed of the wing (12) and the current closing time of the wing (12) by differentiating the position of the wing (12) actuated by the door closer (10) detected by the position sensor. [16] System according to at least one of the preceding claims, characterized by, that the control and / or evaluation device (28) is designed to check whether the recorded and / or determined closing time of the leaf (12) acted upon by the door closer (10) lies within a time interval defined by a predefinable minimum closing time and a predefinable maximum closing time. [17] System according to at least one of the preceding claims, characterized by , that the control and / or evaluation device (28) is designed to count the opening and / or closing cycles of the wing (12) actuated by the door closer (10) by means of the signals supplied by the position sensor. [18] System according to at least one of the preceding claims, characterized by, that the control and / or evaluation unit (28) is designed to monitor the fire protection function and / or the closing speed of the leaf (12) actuated by the door closer (10) by means of the signals supplied by the position sensor. [19] System according to at least one of the preceding claims, characterized by , that the control and / or evaluation unit (28) is designed to combine the signals supplied by the position sensor with the sensor signals supplied by the acceleration sensor and / or with the proximity and / or motion sensor to detect a break in an output or closing axis of the door closer (10), a break in the door or window fitting, tampering with the door closer (10) and / or the fitting. [20] System according to at least one of the preceding claims, characterized by, that the control and / or evaluation device (28) is designed to determine the acceleration of the leaf (12) acted upon by the door closer (10) by double differentiation of the position detected by the position sensor and / or by single differentiation of the velocity detected by the velocity sensor of the leaf (12) acted upon by the door closer (10) during closing, in order to obtain a measure of the closing torque. [21] System according to at least one of the preceding claims, characterized by , that the control and / or evaluation device (28) is designed to determine the dwell time of the wing (12) after an opening in a rest position by means of the signals supplied by the sensor for recording the time, in order to detect a finding of the wing (12) in the open position. [22] System according to at least one of the preceding claims, characterized by, that the control and / or evaluation device (28) is designed to detect a finding of the wing (12) in the open position by means of the pressure of a damping medium of the door closer (10) detected by the pressure sensor. [23] System according to at least one of the preceding claims, characterized by , that the door closer (10) includes a mechanical energy storage device which is charged when the wing (12) is opened and discharged when the wing (12) is closed. [24] System according to at least one of the preceding claims, characterized by , that the door closer (10) is provided with hydraulic and / or regenerative damping.

Images