Safety device with acceleration sensor for industrial door

Abstract

The invention relates to a safety device with an acceleration sensor for an industrial door which is movably mounted between two guide bars (12), comprising at least one optical sensor system (15) for detecting an object, the optical sensor system (15) being mounted in at least one housing (1), the housing and / or the housings can each be fixed to a guide bar. In order to be able to propose lower assembly requirements at at least the same level of safety, the housing (1) and / or at least one of the housings (1) has an acceleration sensor (B) for measuring vibrations and providing vibration data from which an evaluation unit (1b) evaluates whether the door is removed from the guide.

Description

Technical Field

[0001] The present invention relates to a safety device for an industrial door and an industrial door system. Background Art

[0002] It is known from the prior art that industrial doors are provided with various switches so that the movement of the door can be interrupted when the door comes off the guide rail, i.e., in the case of interference. In high-speed doors, for example, radio collision switches are usually used, and in sectional doors, rope slack switches are used. In roller shutters, this protection is not even common for technical reasons. Summary of the Invention

[0003] The object of the present invention is to provide a safety device for an industrial door, which has lower assembly requirements at least at the same safety level.

[0004] This object is solved by the distinguishing features of the present invention starting from a safety device or an industrial door system of the type described at the beginning.

[0005] Advantageous embodiments and improvements of the present invention can be achieved by the measures mentioned in the following solutions.

[0006] The safety device according to the present invention is in principle determined for an industrial door, i.e., for an industrial door system, for example, which uses a roller shutter or a foil door, a sectional door or a high-speed door to close or cover a door opening. It has proven advantageous that the present invention can also be used advantageously in roller shutters and foil doors, where, due to technical reasons, its use has always been problematic. One of the reasons is that the conventional sensors of the prior art are arranged on the movable and co-movable parts of the industrial door, which is technically difficult in light roller shutters and foil doors, which are also wound up in a space-saving manner in a roll. As described below, the advantages are achieved according to the present invention in such a way that the fixed part of the optical sensor additionally has an acceleration sensor, which is typically arranged parallel to or on the guide bar, and vibrations can be detected by means of the acceleration sensor.

[0007] The industrial door is arranged between two guide bars and is guided during movement. The guide bars can, for example, have a U-shaped profile. The edges on both sides of the door are guided in the U-shaped receiving part. The two guide bars can be oriented with the open sides of the U-shaped profile facing each other, so that the door edges on both sides can be guided and moved in the U-profile.

[0008] According to an embodiment, the optical sensor system is, for example, a light barrier or a grating. This can contemplate one-way and two-way light barriers or detectors. In a one-way detector, the transmitter and the receiver face each other, the transmitter being in a sensor strip on one side of the door and the receiver being in a sensor strip on the other side of the door. In a two-way light barrier, the transmitter and the receiver are arranged in the same sensor strip. The reflector is then located in the opposing sensor strip, which reflects the beam from the transmitter back to the receiver. It is also conceivable to use a sensor strip with a distance sensor, such as a TOF sensor (Time-of-Flight sensor). Different from a pure interruption sensor (such as a simple light barrier), the sensor can provide not only information about whether an object is present at all, but also information about the distance at which the object is located.

[0009] If the door becomes detached from the guide rail or guide strip, vibrations occur which occur more strongly than the vibrations that occur during normal operation when the door normally moves in the guiding device. These vibrations can be detected. There has hitherto been a technical prejudice that when the sensor is directly mounted on the moving door and moves with it, this interference can be detected particularly well. On the one hand, the mounting on the door can be problematic in different door types, such as roller shutters and foil doors, which are flexible and are rolled up. Additionally, the manner of data transmission from the sensor is restricted, for example, wireless transmission usually has to be carried out.

[0010] The optical sensor system is arranged in a housing. A single light barrier can be a single housing only for the transmitter and a separate single housing only for the receiver. In the case of a grating, the transmitter or the receiver can also be arranged in the sensor strip. The housing can be directly mounted on the guide strip so that the vibrations can be mechanically transmitted from the guide strip to the housing. The single housing or the sensor strip can be arranged parallel to the respective guide rail. According to the invention, however, an acceleration sensor is now additionally arranged in the housing and can thus measure the vibrations. Thereby, the mounting on the movable door can be advantageously dispensed with and the sensor no longer has to move with the door. Thus, the safety device according to the invention can in principle also be used for all types of door systems while maintaining a high safety level. The sensor device can thus be used particularly flexibly.

[0011] The acceleration sensor can be arranged in a space-saving manner in the housing, i.e., not only in the sensor strip but also in the single housing. Additionally, the acceleration sensor is also advantageously mounted in the housing or in the sensor strip, where the electronic device, in particular the connection device to the evaluation unit, is also located.

[0012] Furthermore, an evaluation unit is provided, which evaluates the vibration data or makes at least one assignment and assigns information on whether the industrial door has come out of the guide bar to the measurement data. For example, the evaluation unit can set that a certain basic vibration occurs when the door moves. However, stronger vibrations may occur when the door comes out of the guide bar, so that the sensor determines such vibrations from a certain threshold of the vibration, such as the amplitude, and interprets them as interference situations.

[0013] The same or another evaluation unit can also evaluate whether the object is within the range of door movement and thus whether a dangerous situation exists. The evaluation unit can also be connected to the door control device and stop the door drive or release the movement.

[0014] In an improved embodiment of the present invention, the evaluation unit can have a connection device to a server or cloud. Depending on the complexity of the evaluation and analysis, which can be achieved, for example, by using pattern recognition or analysis performed under the calculation and recognition of the envelope of the vibration data, a powerful computing unit can be advantageously used, mainly because the recognition and assignment should also be performed in real time. Since the interruption of the door movement should be direct and without a large time delay. However, since such a computing unit is very expensive and not installed in the door system either, a powerful computing unit that can be accessed via the Internet can be used. Thereby, the evaluation unit also advantageously implements an IOT (Internet of Things)-based evaluation.

[0015] The evaluation unit can generally transmit the result of the evaluation, i.e., especially in the simplest case, a digital signal indicating whether there is an interference situation, to the door control device, so that the door control device continues or stops the door movement.

[0016] Therefore, the industrial door system according to the present invention includes an industrial door for closing or covering a door opening, which is movably or displaceably arranged in two guide bars on both sides of the door. In addition, a door drive is provided for moving the door. In order to detect the detachment of the door from the guide device, especially regardless of the type of the door system, a safety device according to the present invention or a safety device according to an embodiment of the present invention is advantageously provided.

[0017] Regarding the door opening, the guide bars can be arranged laterally on the frame of the door opening, i.e., on both sides of the door respectively. The industrial door itself is generally installed above in the area of the lintel of the door opening.

[0018] In an advantageous embodiment, the industrial door system also includes a corresponding door control device, and the safety device works together with the door control device, i.e., the door control device obtains information from the evaluation unit on whether there is an interference situation and whether to directly stop the door movement.

[0019] In principle, depending on the implementation variant, the evaluation unit and, for example, the door control device can also form a structural unit or be separate structural units.

[0020] In a particularly advantageous refinement of the invention, the door itself can be designed sensorless, i.e., the sensor does not have to move with the door but is arranged in a stationary part, such as a sensor bar or housing. The data transmission from the sensor can thus also be carried out more flexibly, and the data transmission is either wired or wireless. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] An embodiment of the invention is shown in the drawings and is described in detail below with regard to further details and advantages.

[0022] It is shown in detail:

[0023] Figure 1 : An industrial door system having a safety device according to the invention. DETAILED DESCRIPTION

[0024] Figure 1 An industrial door system 10 having a door opening 11 is shown. Guide bars 12 are arranged on both sides in the region of the frame of the door opening, and the door 13 can move in the guide bars. The door 13 is arranged in the region of the lintel in the open state, and the door drive 3 is also arranged there.

[0025] The sensor bar 1, as part of the safety device 14, is arranged parallel to the guide device or guide bar 12, and a grating 15 is arranged in the sensor bar. The sensor bar 1 also has an acceleration sensor B, which is arranged or mounted in the housing 1 or also on the housing. The grating 15 and the acceleration sensor B are connected to an evaluation unit 1b. The evaluation unit in turn has an IOT connection device 16 to an external server 17 in order to analyze vibration data by pattern recognition or including an evaluation of the envelope and to decide whether an interference situation exists. The result signal is then transmitted to the door control device 2, causing the drive to open or stop. The door control device 2 is in turn connected to the door drive 3 and transmits the opening or interruption instruction to the door drive 3. If possible, an instruction for reintroducing the door can also be transmitted.

[0026] LIST OF REFERENCE NUMBERS

[0027] 1 Sensor bar

[0028] 1b Evaluation unit

[0029] 2 Door control device

[0030] 3 Door drive

[0031] 10 Industrial door system

[0032] 11 door opening

[0033] 12 guide bar

[0034] 13 door

[0035] 14 safety device

[0036] 15 grating

[0037] 16 IOT connection device

[0038] 17 external server

[0039] B acceleration sensor.

Claims

1. A safety device (14) for an industrial door (13), the industrial door being movably arranged between two guide strips (12), the safety device comprising: at least one optical sensor system (15) for identifying objects, wherein the optical sensor system (15) is mounted in at least one housing (1), and this housing and / or these housings can be fixed to the guide strip in each case, It is characterized in that The housing (1) and / or at least one of the housings (1) has an acceleration sensor (B) for measuring vibrations and providing vibration data, wherein: An evaluation unit (1b) is provided, which evaluates the vibration data and / or assigns information to the vibration data as to whether the industrial door (13) has come out of one of the guide strips (12), so as to transmit the information and / or signal to a door control device (2) for controlling the door drive (3) and thereby stop, start or continue the operation of the industrial door (13).

2. The safety device (14) according to claim 1, characterized in that The optical sensor system (15) is designed as follows: Light barriers; and / or Grating; and / or Distance sensors, especially TOF sensors.

3. A safety device (14) according to any one of the preceding claims, characterised in that The housing (1) and / or at least one of the housings (1) is in each case designed as a sensor strip (1).

4. A safety device (14) according to any one of the preceding claims, characterised in that Exactly two sensor strips (1) are provided, wherein, in particular: a first sensor strip of the sensor strips (1) comprises an emitter of the light barrier and / or the light grid (15), and a second sensor strip of the sensor strips (1) comprises a receiver, or a first sensor bar of the sensor bars (1) having an emitter and a receiver, and a second sensor bar having a reflector for reflecting light emitted from the emitter in the direction of the receiver, or At least one of the sensor bars (1) or the sensor bars comprises a TOF sensor.

5. A safety device (14) according to any one of the preceding claims, characterised in that The evaluation unit (1b) has a connection (16) to a server (17) and / or a cloud for analyzing the vibration data, wherein in particular the server (17) and / or the cloud are components of the evaluation unit (1b).

6. A safety device (14) according to any one of the preceding claims, characterised in that The evaluation unit (1b), in particular the server (17) and / or the cloud, is designed to subject the vibration data to pattern recognition or identification of an envelope of the vibration data for evaluation.

7. An industrial door system (10), comprising: Industrial door (13), used to close or cover the door opening (11), Two guide strips (12) for movably mounting the industrial door (13), a door drive (3) for moving the industrial door (13) in the guide strip (12), in particular for winding and unwinding the industrial door (13) in a motor-driven manner, • A safety device (14) according to any one of the preceding claims.

8. The industrial door system (10) according to any one of the preceding claims, characterized in that The safety device (14) and / or the housing (1) and / or the housing (1) are respectively mounted in parallel on one of the guide strips (12).

9. The industrial door system (10) according to any one of the preceding claims, characterized in that The guide bar (12) is designed as a U-shaped guide rail.

10. The industrial door system (10) according to any one of the preceding claims, characterized in that The industrial door (13) is designed as a rolling door, a foil door, a sectional door or a high-speed door.

11. The industrial door system (10) according to any one of the preceding claims, characterized in that A door opening (11) is present, wherein in particular the guide strips (12) are respectively arranged opposite each other on frames of the door opening (11) and / or the industrial door (13) is arranged on a door lintel of the door opening (11).

12. The industrial door system (10) according to any one of the preceding claims, characterized in that A door control device (2) is provided for controlling the door drive (3), and is connected to the evaluation unit (1b).

13. The industrial door system (10) according to any one of the preceding claims, characterized in that The industrial door (13) is designed to be sensorless.

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