DEVICE FOR DETECTING THE FALL OF A DOOR LEAF, SYSTEM FOR DETECTING THE FALL OF A DOOR LEAF, AND METHOD FOR DETECTING THE FALL OF A DOOR LEAF

Abstract

The invention relates to a device (100) for detecting the falling of a door leaf (2) of a door (1), preferably a high-speed industrial door (1), the device (100) for detecting the falling of a door leaf being provided on or in the door leaf (2). The device (100) for detecting the falling of a door leaf comprises a means for detecting the acceleration of said device (100) in at least one falling direction of the device (100), and a wireless communication unit (200) for emitting a falling warning signal in the event of a falling of the door leaf (2) being positively detected. The positive detection of the falling of the door leaf (2) is based on an acceleration being detected in the falling direction.

Claims

1. A door leaf fall detection device for detecting a fall of a door leaf of a door, the door leaf fall detection device being provided on or in the door leaf, comprising: a detector for detecting an acceleration of the door leaf fall detection device in at least one falling direction of the door leaf fall detection device; and a wireless communication unit for transmitting a fall notification signal in response to a positive detection of the fall of the door leaf, wherein the positive detection of the fall of the door leaf is based on the detected acceleration.

2. The door leaf fall detection device according to claim 1, further comprising: an electromechanical energy converter having a mass movable relative to said door leaf fall detection device, wherein a power supply of the door leaf fall detection device is provided with electrical power from the electromechanical energy converter.

3. The door leaf fall detection device according to claim 1, wherein the detector for detecting the acceleration of the door leaf fall detection device is a piezoelectric acceleration sensor or a MEMS acceleration sensor which measures the acceleration of the door leaf fall detection device in the falling direction.

4. The door leaf fall detection device according to claim 2, wherein the detector for detecting the acceleration of the door leaf fall detection device is an analog-to-digital converter which detects a voltage of an output of the electromechanical energy converter, wherein the voltage of the output of the energy converter is a function of the acceleration of the door leaf fall detection device in the falling direction.

5. The door leaf fall detection device according to claim 1, wherein the positive detection of the fall of the door leaf is determined where the detected acceleration deviates from a predetermined acceleration range or a speed calculated from the detected acceleration exceeds a predetermined speed threshold value.

6. The door leaf fall detection device according to claim 1, wherein the positive detection of the fall of the door leaf is determined where the detected acceleration is within an impermissible acceleration range for a predetermined first period of time, and wherein the predetermined first period of time is arranged to be longer than a period of time in which the detected acceleration occurs during normal operation of the door leaf.

7. The door leaf fall detection device according to claim 1, wherein the positive detection of the fall of the door leaf is determined where the detected acceleration is within an impermissible acceleration range for a predetermined second period of time, and wherein the predetermined second period of time is arranged to be shorter than a period of time in which the detected acceleration occurs during normal operation of the door leaf.

8. The door leaf fall detection device according to claim 1, wherein the positive detection of the fall of the door leaf is determined where a change in the detected of acceleration deviates by more than a predetermined tolerance from a desired change of acceleration of the door leaf.

9. The door leaf fall detection device according to claim 2, wherein the detector for detecting the acceleration of the door leaf fall detection device is at least one comparator having a preset voltage threshold value corresponding to at least one preset acceleration threshold value, the at least one comparator being connected with its input to an output of the electromechanical energy converter; and wherein the positive detection of the fall of the door leaf is determined where the output of the electromechanical energy converter exceeds the preset voltage threshold value.

10. The door leaf fall detection device according to claim 2, wherein the electromechanical energy converter is arranged such that it is based on the induction principle or the piezoelectric principle.

11. The door leaf fall detection device (100) according to claim 2, wherein the electromechanical energy converter is a linear generator, a degree of freedom of the mass of the electromechanical energy converter is f=1, and the degree of freedom of the mass corresponds to at least one of the falling directions.

12. The door leaf fall detection device according to claim 2, further comprising at least one of: an energy storage unit for storing the electrical energy generated by the electromechanical energy converter; an energy management unit for managing energy generated by the electromechanical energy converter; a rectifier for rectifying an output voltage generated by the electromechanical energy converter; and a computing unit for calculating the acceleration, wherein the computing unit comprises a signal processing unit.

13. A system for fall protection of a door, comprising: a door comprising: a door leaf which is guided by lateral guides and which covers a door opening, a driving device for moving the door leaf between an open and closed position, and a controller for controlling the driving device, the controller having a further communication unit; and a door leaf fall detection device provided on or in the door leaf, comprising: a detector for detecting an acceleration of the door leaf fall detection device in at least one falling direction of the door leaf fall detection device; and a wireless communication unit for transmitting a fall notification signal to the further communication unit of the controller in response to a positive detection of a fall of the door leaf, wherein the positive detection of the fall of the door leaf is based on the detected acceleration.

14. The system according to claim 13, wherein in response to the fall notification signal being received, an emergency stop mechanism stops the fall of the door leaf within a predefined period of time by triggering a motor brake and/or mechanical locking bolts by the door leaf fall detection device.

15. The system according to claim 13, wherein in response to the fall notification signal being received, an emergency stop mechanism stops the fall of the door leaf within a predefined period of time by releasing a motor brake and/or mechanical locking bolts from the controller.

16. (canceled)

17. A method for detecting a fall of a door leaf of a door, comprising the following steps: converting an acceleration of the door leaf into electrical energy using of an electromechanical energy converter; detecting the acceleration of the door leaf; determining a positive detection of the fall of the door leaf based on the detected acceleration; triggering a fall interlock device in response to the positive detection of the fall of the door leaf; and transmitting a fall notification signal by a wireless communication device in response to the positive detection of the fall of the door leaf, wherein the steps of detecting, determining, and transmitting are performed exclusively using the electrical energy converted from the acceleration of the door leaf.

Description

[0095] The door according to the invention will be explained in detail in the following examples by means of the figures of the drawing: It shows:

[0096] FIG. 1 A front view of an roller shutter 1/rolling door 1 according to the invention;

[0097] FIG. 2 a principle diagram of a control system for a door, comprising a door leaf fall detection device 100, a door control means 5, and a driving means 4;

[0098] FIG. 3 a schematic representation of the kinetics (speed, acceleration and jerk) of the door leaf during normal operation and around the fall of the door leaf, as well as of detection possibilities of the fall of the door leaf;

[0099] FIG. 4 a schematic diagram of functional assemblies of the electric door leaf fall detection device 100 shown in FIG. 1;

[0100] FIG. 5 an energy converter 21 according to one aspect of the invention;

[0101] FIG. 6 an energy converter 21 according to another aspect of the invention;

[0102] FIG. 1 shows a front view of a roller shutter 1/rolling door 1 according to the invention. As shown in FIG. 1, rolling door 1 has a door leaf 2 which is held in lateral guides 3 and comprises a plurality of slats 12 which extend perpendicularly to guides 3 over a door opening.

[0103] The door leaf 2 may also have hinge hinges 14, which comprise a plurality of hinge links. In each case two hinge members assigned to one another can be connected to one another by a stiffening profile extending transversely to the lateral guides 3 in such a way that the hinge bands 14 with the stiffening profiles form a stable, angled framework.

[0104] As an alternative to slats 12, the door leaf can comprise 2 segments, which can be guided in a rail system above door 1, for example on a ceiling, without being rolled up. The door leaf 2 can also be designed as a door curtain made of flexible PVC (polyvinyl chloride) with an end strip. If acrylic glass is used, the door leaf 2 can also be transparent. Since door 1 can be designed as an internal or external door, door leaf 2 can also include windows or doors.

[0105] Furthermore, the door leaf 2 has an end element 7, which is provided with a rubber seal or the like on the floor side. The end element 7 and the hinge links can be swiveled coaxially to the swivel axes of the hinge links. In the end element 7 there is a door leaf fall detection device 100 provided.

[0106] The door leaf 2 is driven by a motor 10 of the driving means 4 shown in FIG. 1, which transmits the motor power by means of a drive shaft in a manner known per se. The motor power is dimensioned in such a way that the roller shutter 1 can open and close quickly (>1 m/s, preferably >2 m/s).

[0107] If the roller shutter 1 is in the closed state, the end element 7 is in contact with a bottom-side element of the roller shutter 1. In this condition, the thermal separating effect or the tightness of the roller shutter 1 is greatest, so that an air exchange between the first and the second side of the roller shutter 1 is largely or completely prevented. In the fully opened state, the maximum area of the door opening released by the roller shutter 1 is the maximum. However, roller shutter 1 can also assume any other state between the closed and open state, according to the programming of the door control means 5.

[0108] FIG. 2 shows a principle diagram of a system consisting of the electric door leaf fall detection device 100, the door control means 5 and the driving means 4. The door leaf fall detection device 100 is arranged in or on the door leaf 2 as shown in FIG. 1. The door control means 5 is also connected to at least one EMERGENCY-STOP means. The EMERGENCY-STOP means is used to stop door leaf 2 in the event of a (detected) fall of door leaf 2. For example, locking devices may be located in or near the guides of door leaf 2 and, if activated by door control means 5, may prevent or stop movement of door leaf 2 in the event of a fall. In detail, locking bolts or brake shoes could be used for this purpose. Alternatively, the EMERGENCY-STOP means can also intervene in the driving means 4 of the door leaf 2 and, for example, prevent, in an appropriate manner, the motor axis from rotating.

[0109] The driving means 4 and the door control means 5 can be arranged stationary and can be arranged adjacent to the door leaf 2. Communication between the door leaf fall detection device 100, the door control means 5 and the driving means 4 can be bidirectional or unidirectional via radio. When the communication between the door leaf fall detection device 100 and the door control means 5 is unidirectional as represented by arrow a) in FIG. 2, the door leaf fall detection device 100 is formed with a transmitting unit and the door control means 5 is configured with a receiving unit. When communication between door leaf fall detection device 100 and door control means 5 is bidirectional, represented by arrows a) and b), both the door leaf fall detection device 100 and the door control means 5 are configured as transmitting and receiving unit, respectively. With the aid of the optional sensor unit, 25 recorded parameters are transmitted via the communication unit 200 of the door leaf fall detection device 100 to the transmitter and receiver unit of the door control means.

[0110] The signal transmission between the first and second transmitting and receiving unit 200, an example of a wireless communication unit 200, can take place via a bidirectional radio link. For example, the transmission can take place with Bluetooth. After identification of the first or second transmitting and receiving unit 200 via the respective 48-bit address, data transmission takes place via data packets. For example, the RS-232 serial interface can be used as an interface to the microcontroller units.

[0111] Preferably, the signal transmission can take place via a unidirectional radio link. For example, only one receiver unit is provided on the door control means 5, while only one transmitter unit is provided on the door leaf fall detection device. For example, unidirectional data transmission can be sufficient for certain applications. In addition, this type of data transmission is energy-saving in comparison to bidirectional data transmission, since the door leaf fall detection device 100 does not consume any energy for the readiness to receive or for the reception of data.

[0112] In general, only unidirectional transmission is required for a fall notification signal which, for example, only consists of a single radio signal with identification code and data field (in which the fall of the door leaf is noted positively). In order to ensure that the fall signal is actually received, it can be repeated several times (e.g. twice).

[0113] Several devices may be connected to the door control means 5, such as an opening switch 51, a remote condition, or other sensors which detect the door opening range. The door control means 5 takes into account the information or operationally relevant parameters received by these other devices and controls the driving means 4 in such a way that it opens or closes the roller shutter door 1 in accordance with the desired operating mode.

[0114] Thus the door control means 5 of these sensors receives further operationally relevant parameters from the door leaf fall detection device 100. These operationally relevant parameters are also taken into account by the door control means 5 when controlling the driving means 4.

[0115] The connection between door control means 5 and driving means 4 can be made either via cable or wirelessly, for example via radio as shown above. The driving means 4 drives the door leaf 2 depending on the commands received.

[0116] FIG. 3 shows a schematic representation of the kinetics (i.e. the speed, acceleration and/or jerk) of the door leaf in normal operation and in the event of the door leaf falling, as well as of the means of detection of the door leaf falling.

[0117] On the left side of FIG. 3 the examples (starting from the top) of speed, acceleration (double) and jerk of the door leaf are given for a door of FIG. 1 as a function of time in seconds. The time scales of all four diagrams in FIG. 3 (horizontal) are the same, i.e. all four diagrams show the same processes over time. For example, the corresponding acceleration is indicated vertically below in accordance with the velocity curve.

[0118] Under the heading Opening the course of an opening operation of a door leaf is indicated for each of the sizes listed above and under the heading Closing the course of a closing operation of a door leaf is indicated for each of the sizes listed above.

[0119] For example, in the example of curve a of FIG. 3 (indicated by the solid line), the door leaf is accelerated to a predetermined speed, moved at this speed for a while, and then braked back to zero speed to a standstill. The same is true for curve b (indicated by the solid line) when the door is closed.

[0120] The curves c, d, e and f also indicate the acceleration that takes place on the door leaf during the opening and closing processes. In FIG. 3 below, the jerk with the curves g1, g2, h1, h2, i1, i2, j1 and j2 is indicated to match this.

[0121] Between opening and closing, the door is largely or completely open, i.e. door leaf 2 is at the top. After closing, the door is closed, i.e. door leaf 2 is at the bottom.

[0122] The dot-dashed line also indicates the unplanned case of a door leaf fall. At point P1, for example, the pull or holding rope of door leaf 2 of an open door 1 breaks. As a result, the door leaf 2 is accelerated downwards by the gravitational force and would hit the ground at point P2. By comparing the calculated absolute speed of the door leaf with a predetermined speed threshold value or by comparing the measured acceleration with a predetermined acceleration threshold value, the fall of the door leaf before impact on the ground can now be detected and, for example, an emergency stop of the door leaf can be initiated. In the case of a comparison of the speeds, a positive detection of the fall is indicated by point A. In the case of a comparison of the accelerations, a positive detection of the fall with point B is indicated.

[0123] In addition or alternatively, the fall of the door leaf 2 can be evaluated positively if the detected acceleration for a predetermined first period of time lies within an impermissible acceleration range, wherein the predetermined first period of time t1 is arranged in such a way that it is longer (possibly by more than one tolerance) than the period of time t door in which the detected acceleration lies during normal operation of the door leaf (2). This case of a door leaf 2, which falls or slips slowly (i.e. slower relative to the usual movement by the driving means), is shown in detail in the third diagram (counted from above) of FIG. 3.

[0124] The period of time t1 is measured here, in which the acceleration of the door leaf 2 is in a predefined acceleration range, i.e., for example, the period of time from entry to exit into the predefined acceleration range. This determined period of time t1 is compared with a period of time t door, which was either calibrated once by the manufacturer in advance, or which was recorded during a previous regular closing method and stored in the door leaf fall detection device. The latter has the advantage that the wear of the door is taken into account over the service life.

[0125] With reference to the fourth diagram (counted from above) of FIG. 3, the jerk of the door leaf 2 in normal operation (cf. for example the curve h1, the nominal curve) and also for comparison the jerk in the event of a fall (cf. the dotted line between P1 and P2, the actual curve in the event of a fall) is indicated. Thus, the jerk in nominal operation is clearly distinguished from the jerk in a fall, which can be evaluated by means of suitable mathematical methods (e.g. by means of at least one threshold value or by comparing the curve profile).

[0126] In summary, there are a number of possible evaluation options for recording a fall of the door leaf, which have been described in more detail above.

[0127] FIG. 4 shows a schematic diagram of the functional assemblies of the electromechanical door leaf fall detection device 100 shown in FIG. 1 and FIG. 2. The door leaf fall detection device 100 has an energy converter 21, an energy management unit 22, an energy storage unit 23, a computing unit 24, an optional sensor unit 25 and optionally at least one actuator unit 26.

[0128] For example, the invention energy converter 21 can convert the mechanical energy of door leaf 2 into electrical energy to supply the electrical loads in the door leaf fall detection device 100. Possible designs of the energy converter 21 are described in detail below.

[0129] During an opening and/or closing process, the energy converter 21 can generate sufficient power to operate the loads. For example, it is possible to generate some 10 mW power, which is sufficient for the operation of corresponding low-power components. Controlled by the energy management unit 22, the power generated by the energy converter 21 can be used to charge the energy storage unit 23 and/or to supply the consumers of the door leaf fall detection device 100.

[0130] The inventive energy management unit 22 acts as an interface between energy converter 21, energy storage unit 23 and the other electrical loads contained in the door leaf fall detection device 100. In addition, the energy management unit 22, usually by means of a simple electronic circuit, converts the energy (voltage, current) generated by the energy converter 21 in such a way that it can be stored in the energy storage unit 23 for a longer period of time. For example, a bridge rectifier converts the AC voltage generated by the energy converter 21 into a DC voltage. The energy management unit 22 is designed in such a way that it itself has a high degree of efficiency and consumes little energy.

[0131] The energy storage unit 23 is preferably a capacitor with a large capacity, for example a gold cap with at least several mF, which serves the intermediate storage of the electrical energy produced by the energy converter 21. The energy storage unit 23 is connected to the energy management unit 22. Thus, the energy storage unit 23 is intended to make energy available to the consumers of the invented door leaf fall detection device 100 at times when the energy converter 21 generates no or too little energy. The energy storage unit 23 preferably has a low self-discharge rate so that the stored energy is also available for longer periods of time and the efficiency of the door leaf fall detection device is 100.

[0132] The electrical loads of the invented door leaf fall detection device 100 comprise at least one computing unit 24 and optionally at least one sensor unit 25. The computing unit 24 has the wireless communication unit 200 and the signal processing unit 242. The signal processing unit 242 can be implemented via a microcontroller, such as a conventional 8-bit microcontroller, or alternatively via a DSP (Digital Signal Processor). This signal processing unit 242 is preferably designed in ultra-low-power technology.

[0133] The sensor unit 25 optionally has at least one sensor 251 for detecting the kinetics of the door leaf fall detection device 100 (i.e., at least one of the following parameters: Speed, acceleration, jerk) and optionally a signal conditioning unit 252. The signal conditioning unit 252 can method the electrical signal output by the sensor 251 (e.g. digital acceleration data), such as filtering, amplifying or converting it into absolute measured values (e.g. in G). If several physical kinetic parameters are detected, the signal conditioning unit 252 can also multiplex the electrical signals.

[0134] The calculation unit 24 is used to implement the processes described in FIG. 3 in one application case. For example, the arithmetic unit can convert the data of an acceleration sensor 251 by integrating it into a speed value relating to door leaf 2. Then the arithmetic unit can compare this numerical speed value with a predetermined speed threshold value. If the predetermined speed threshold value is exceeded (or deviated from), the arithmetic unit triggers a fall notification signal which is then transmitted from the wireless communication unit 200 to the door control means 5 immediately after the speed threshold value has been exceeded. It can then react appropriately to the fall of the door.

[0135] In an application, the actuator unit is used for emergency braking or EMERGENCY-STOP of the door leaf. This can be achieved by means of mechanically pretensioned bolts which, in an emergency, intervene in the frames by unlocking them and cause the freely falling door leaf to lock in place and stop immediately. These bolts are preferably mounted on both sides of the door leaf adjacent to the door leaf guides.

[0136] In another application, the processing unit 24 is only used to method the measured values of the sensor 251 and then transmit the measured values to the door control means. In this case, the door control means 5 can then perform the operations described in FIG. 3 to detect and respond appropriately to a door fall.

[0137] FIG. 5 and FIG. 6 each show a version of an energy converter 21, which converts the mechanical energy of the door leaf 20 into electrical energy.

[0138] The energy converter 21 shown in FIG. 5 operates with the aid of the induction principle. For this purpose, two opposite springs 211a and 211b are arranged in a cavity in the energy converter 21, both of which can be deflected along their central axes, which run in the same direction. The springs 211a and 211b are firmly connected to the end element 7 by fasteners 214a and 214b.

[0139] A magnet 212 is attached to the free movable ends of the springs 211a and 211b. This allows the magnet 212, which is suspended along the central axes of the springs 211a and 211b, to move both in the direction of one spring 211a and in the direction of the other spring 211b. The degree of freedom f of the magnet 212 is f=1. This can be achieved, for example, by a linear guide of the magnet 212 which is not shown in detail or by a two-sided suspension of the magnet 212. The spring constants of the springs 211a and 211b are designed in relation to the mass of the magnet 212 in such a way that they allow an oscillating (damped) oscillation of the magnet 212. If the energy converter 21 is now accelerated in a direction in which the magnet 212 can be deflected, mechanical energy is supplied to the oscillating system consisting of springs 211a, 211b and magnet 212. The oscillating system will continue to oscillate, especially when the acceleration of the energy converter 21 has ended. In order to achieve the greatest possible oscillation of the oscillating system, the directions of the acceleration forces which can act on the energy converter 21 coincide with the directions in which the magnet 212 can be deflected.

[0140] The suspension of the magnet 212 according to the invention allows a linear displacement of the same. The movement of the end element 7 over large areas is also a linear movement. Accordingly, the energy converter 21 is arranged in the terminal element 7 in such a way that the degree of freedom of movement (degree of translational freedom f=1) of the magnet 212 corresponds to the opening and closing directions. This optimizes the efficiency of the energy converter 21. FIG. 5 shows an energy converter whose degree of freedom coincides with a door leaf that closes downwards and opens upwards.

[0141] In addition, a coil 213 is arranged in the energy converter 21 in such a way that the magnet 212 moves along its central axis. Thus the magnet 212 moves back and forth at least partially in the coil 213. When the magnet 212 oscillates, electrical energy is generated by induction, which is made available at the output of the energy converter 21 in the form of an alternating voltage. A particular advantage of the linear energy converter 21 according to the invention is that it is adapted to the deterministically predictable movement and the associated acceleration forces of the door leaf 2 in such a way that maximum efficiency is achieved. It is particularly advantageous if the energy converter 21 is arranged in the closing element 7, since the movement of the closing element 7, in comparison with other elements of the door leaf 7, runs mainly along a straight line. Thus the inertial forces acting on magnet 212 due to the movement of door leaf 2 are parallel to the forces acting on magnet 212 due to springs 211a and 211b. This alignment of the forces acting on the magnet 212 optimizes the energy transfer to the springs 211a and 211b. This will ultimately lead to efficient energy conversion.

[0142] In addition, the degree of freedom of the energy converter 21 can also coincide with the direction of fall of the door leaf 2, as shown in FIG. 5. Because then the energy converter 21 will react particularly sensitively to the kinetics of the fall of the door leaf 2. For example, the jerk (or the associated acceleration) which occurs when the door leaf 2 falls (compared to a lower acceleration when operated by the driving means 4) can lead to a particularly large deflection of the magnet 212, which in turn leads to a particularly high voltage at the output of the energy converter 21. This abnormally high voltage can now be detected by means of a suitably defined voltage threshold and a comparator, with which a digital signal is applied to the output of the comparator which indicates the fall of the door leaf 2. The computing unit 24 can now react to this signal in a suitable way, for example by outputting a fall notification signal (fall alarm signal) via the wireless communication unit 200. Thus the sensor unit 24 can be omitted, and the energy generator 24 serves together with the comparator for the detection of the fall, with which an economical and energy self-sufficient door leaf fall detection device 100 can be realized in an advantageous way.

[0143] The alternative energy converter 21 shown in FIG. 5 operates according to the piezoelectric principle. A fastening element 223 is arranged in the end element 7. A flexural resonator 221, comprising the flexural resonator elements 221a and 221b, is attached at one end to this fastening element 223. The flexural resonator 221 is preferably a piezoelectric element, which is known from the state of the art. A mass 222 is attached to the other, free end of the flexural resonator 221. The flexural resonator 221 and the mass 222 are arranged perpendicular to the direction of movement of the door leaf 21 in such a way that the flexural resonator 221 is deflected as effectively as possible when the door leaf 2 accelerates.

[0144] If door leaf 2 is opened or closed, the energy converter 21 is accelerated with door leaf 2. The inertia force acting on mass 222 in the opposite direction to the acceleration deflects the flexural resonator 221 and again causes it to oscillate in a damped manner. The flexural resonator 221 thus generates an alternating voltage, which the energy converter 21 makes available at its output.

[0145] The flexural resonator 221 according to the invention is arranged perpendicular to the direction of motion of the door leaf 2 in such a way that it reaches its maximum deflection when the door leaf 2 accelerates. The flexural resonator 221 is arranged in such a way that it essentially has only one translational degree of freedom (f=1). Since the flexural resonator is clamped on one side and mass 222 is attached to its free end, this mass 222 can further increase the deflection of the flexural resonator 221. The weight force and the point of application of mass 222 on the flexural resonator 221 as well as the design of the flexural resonator 221 itself, such as length, thickness and modulus of elasticity, are designed in such a way that the electrical voltage generated is maximum. Here too, as shown in FIG. 6, the degree of freedom can preferably coincide with the at least one direction of fall of the door leaf 2. Furthermore, a comparator can be used to record the fall in a similar way, as explained in connection with FIG. 6.

[0146] The invention permits further design principles in addition to the forms of execution and aspects explained. Thus, individual features of the various design forms and aspects can be combined with each other as desired, as long as this is feasible for the specialist.

[0147] Alternatively, other mechanics can also be used for the electromechanical energy converter. For example, a dynamo with one axis and with a mass eccentrically attached to the axis can also be used.

[0148] The invented door, which was explained above as a rolling door, can also be a folding door or a hinged door, for example. Thus, according to the invention, all doors are covered in which door leaves experience a defined movement or a predetermined path.

[0149] Furthermore, the door leaf fall detection device may be located anywhere on the door leaf, for example in the middle.

[0150] In principle, the door leaf fall detection device can also have other assemblies, such as low energy consumption display elements.

[0151] In addition, the door leaf fall detection device can have a thermogenerator as an additional energy converter. Such a thermo/voltage converter is a thermoelectric generator that can convert a temperature difference into electrical energy. The thermoelectric generator is based on the Seebeck effect, or the reverse Peltier effect, in which a temperature difference leads to a voltage at two electrodes arranged on opposite sides of a plate-shaped element. For example, Peltier-like elements are mounted between the first and the second side of the door leaf in a lamella. Semiconductor materials such as Bi2Te3, PbTe, SiGe, BiSb or FeSi2 can be used as materials here.

[0152] The door leaf shown in FIG. 1 can move from bottom to top and vice versa. However, the invention also included doors whose door leaves could move in other directions, e.g. sideways.