SECURITY STRIP FOR A DOOR AND METHOD OF OPERATING A SECURITY STRIP

Abstract

The present disclosure concerns a safety strip for a door, in particular for a door of a means of transport. The safety strip is elastic and/or flexible, has at least one receiving space, and comprises a sensor arrangement. The sensor arrangement is set up to emit electromagnetic radiation into a monitored area and to receive such radiation from the monitored area. The sensor arrangement is arranged in the receiving space in such a way that the safety strip completely encloses the sensor arrangement at least in one plane.

Claims

1. A safety strip for a door of a means of transport, wherein: the safety strip is elastic and/or flexible and comprises at least one receiving space and a sensor arrangement; the sensor arrangement is set up to emit electromagnetic radiation into a monitored area, and to receive electromagnetic radiation from the monitored area; and the sensor arrangement is arranged in the at least one receiving space in such a way that the safety strip completely encloses the sensor arrangement at least in one plane.

2. The safety strip according to claim 1, wherein the sensor arrangement is arranged in the receiving space in such a way that at least 25% or at least 50% or at least 75% or at least 90% or 95% of a surface of the sensor arrangement is enclosed by the safety strip, with the sensor arrangement being enclosed essentially completely by the safety strip.

3. The safety strip according to claim 1, wherein: the sensor arrangement is a radar sensor arrangement, the radar sensor arrangement comprising an FMCW radar sensor arrangement, a CW radar sensor arrangement, an M-sequence radar sensor arrangement, or a pulse modulation radar sensor arrangement; and/or a frequency of the electromagnetic radiation is between 30 kHz and 3000 GHz or between 1 MHz and 3000 GHz or between 1 MHz and 300 GHz or between 6 MHz and 300 GHz or between 1 GHz and 300 GHz or between 59 GHz and 62 GHz.

4. The safety strip according to claim 1, the sensor arrangement further comprising at least one antenna, with the at least one antenna being set up to emit electromagnetic radiation into the monitored area and/or to receive electromagnetic radiation from the monitored area; the sensor arrangement comprising at least a first antenna and at least a second antenna, with the first antenna being set up to emit electromagnetic radiation into the monitored area the second antenna being set up to receive electromagnetic radiation from the monitored area, in particular the sensor arrangement comprising at least a first antenna and at least a second antenna.

5. The safety strip according to claim 1, wherein the safety strip comprises a fastening section by means of which the safety strip is connectable to the door non-positively and/or positively.

6. The safety strip according to claim 1, wherein a length of the safety strip being a multiple of its width, and with the sensor arrangement being arranged at a distance of not more than 30% or not more than 20% or not more than 10% of the total length of the safety strip in longitudinal direction from an end of the safety strip.

7. The safety strip according to claim 1, wherein the sensor arrangement comprises a controller, with the controller being set up to determine, on a basis of the electromagnetic radiation received, whether at least one object is located within the monitored area.

8. The safety strip according to claim 7, wherein the controller is set up to edit, to process and/or to evaluate a signal that is based on the electromagnetic radiation received, and to apply one or multiple filters to the signal.

9. The safety strip according to claim 7, wherein the controller is set up to determine a location, and/or a speed, and/or a direction of movement of the object on the basis of the electromagnetic radiation received in the monitored area and/or based on the edited, processed and/or evaluated signal.

10. The safety strip according to any one of the claim 7, wherein the controller is set up to classify the object on the basis of the electromagnetic radiation and/or on the basis of the edited, processed and/or evaluated signal.

11. The safety strip according to any one of the claim 7, wherein the controller is set up to separate the object on the basis of the electromagnetic radiation and/or on the basis of the edited, processed and/or evaluated signal.

12. The safety strip according to any one of the claim 7, wherein the controller is set up to generate, on the basis of the electromagnetic radiation and/or on the basis of the edited, processed and/or evaluated signal and/or on the basis of the classification and/or on the basis of a state of the door, a signal that can be used to change an operation of the door or a movement of the door of a closing operation of the door.

13. A method for operating a safety strip for a door of a means of transport, wherein the safety strip comprises a sensor arrangement that is arranged within a receiving space of the safety strip, and is completely enclosed by the safety strip at least in one plane, the method comprising: emitting, by the sensor arrangement, electromagnetic radiation into a monitored area; receiving, by the sensor arrangement, electromagnetic radiation from the monitored area; and determining, on the basis of electromagnetic radiation received, whether an object is located within the monitored space.

14. A door comprising a safety strip, wherein the safety strip is elastic and/or flexible and comprises at least one receiving space and a sensor arrangement; wherein the sensor arrangement is set up to emit electromagnetic radiation into a monitored area, and to receive electromagnetic radiation from the monitored area; and wherein the sensor arrangement is arranged in the at least one receiving space in such a way that the safety strip completely encloses the sensor arrangement at least in one plane.

15. A means of transport comprising at least one door, the at least one door comprising a safety strip, wherein the safety strip is elastic and/or flexible and comprises at least one receiving space and a sensor arrangement; wherein the sensor arrangement is set up to emit electromagnetic radiation into a monitored area, and to receive electromagnetic radiation from the monitored area; and wherein the sensor arrangement is arranged in the at least one receiving space in such a way that the safety strip completely encloses the sensor arrangement at least in one plane.

16. The means of transport according to claim 15, wherein the at least one door comprises two doors.

Description

SHORT DESCRIPTION OF THE FIGURES

[0076] In the following, the disclosure, or further embodiments and advantages of the disclosure, are explained in more detail with the help of figures, the figures only describing embodiments of the disclosure. Identical components in the figures have identical reference signs.

[0077] FIG. 1a shows a door arrangement in a first state;

[0078] FIG. 1b shows a door arrangement in a second state;

[0079] FIG. 2a shows a door arrangement in a first state;

[0080] FIG. 2b shows a door arrangement in a second state;

[0081] FIG. 3a shows a safety strip and a door in a non-connected state;

[0082] FIG. 3b shows the safety strip and the door in a connected state;

[0083] FIG. 4 shows a schematic diagram of a sensor arrangement;

[0084] FIG. 5a shows a door arrangement in a first state;

[0085] FIG. 5b shows a measurement by a sensor arrangement;

[0086] FIG. 5c shows a measurement by a sensor arrangement;

[0087] FIG. 5d shows a measurement by a sensor arrangement;

[0088] FIG. 6a shows a door arrangement in a first state;

[0089] FIG. 6b shows a measurement by a sensor arrangement;

[0090] FIG. 6c shows a measurement by a sensor arrangement;

[0091] FIG. 6d shows a measurement by a sensor arrangement;

[0092] FIG. 7a shows a door arrangement in a first state;

[0093] FIG. 7b shows a measurement by a sensor arrangement;

[0094] FIG. 7c shows a measurement by a sensor arrangement;

[0095] FIG. 7d shows a measurement by a sensor arrangement;

[0096] FIG. 8a shows a monitored area of a sensor arrangement; and

[0097] FIG. 8b shows a monitored area of a sensor arrangement, and a monitored area of a sensor arrangement.

DETAILED DESCRIPTION

[0098] FIG. 1a shows a door arrangement 1000 in a first state. The door arrangement 1000 comprises a door 300. The door 300 can be a door of a means of transport, e.g., of a train. The door 300 is a single-leaf design. The door 300 can be designed as a sliding door that closes against a frame 500. The door 300 preferably comprises a safety strip 200 at a front side, that, when the door 300 touches the frame 500, which e.g., is an aluminum or steel profile, is (slightly) compressed. The door 300 preferably has a glass or a windowpane 400. The door 300 can define an X-Y-plane. A Z-direction can be oriented perpendicular to the X-Y-plane.

[0099] The safety strip 200 comprises a sensor arrangement 100. The sensor arrangement 100 can be arranged in the upper half (in the direction of gravitation) of the safety strip 200. Preferably, the sensor arrangement 100 is arranged in the upper third, or in the upper fourth, of the safety strip 200. The sensor arrangement 100 is enclosed, or covered, by the safety strip 200 at least partly, in particular completely. The sensor arrangement 100 can be a radar sensor arrangement.

[0100] In FIG. 1a, the door 300 is closed, so that the safety strip 200 touches the frame 500. When the door 300 is closed, the sensor arrangement 100 can be set up to not take a measurement.

[0101] FIG. 1b shows the door arrangement 1000 from FIG. 1a, the door 300 being partly open. When the door 300 is open, the sensor arrangement 100 can be set up to take a measurement. To do this, the sensor arrangement 100 can emit electromagnetic radiation into a monitored area and receive electromagnetic radiation from the monitored area.

[0102] The monitored area preferably is an entrance and/or exit area of the door 300. The monitored area can extend perpendicular to a plane defined by the door (in a direction and/or in the opposite direction) over a distance of at least 0.1 m, or up to at least 3.0 m. This allows the monitoring of the monitored area for objects, e.g., persons or things.

[0103] It is intended to arrange the sensor arrangement 100 within the safety strip 200 for the most part, or even entirely. This protects the sensor arrangement 100 against vandalism, dust, and other environmental influences.

[0104] In FIG. 1b, an object 800 is located within the monitored area. The sensor arrangement 100 emits electromagnetic radiation into the monitored area (also called monitored space). The electromagnetic radiation can be reflected at the object 800. The reflected electromagnetic radiation can be received by the sensor arrangement 100. The object 800 can be identified based on the electromagnetic radiation received. Moreover, it can be identified or determined, based on the electromagnetic radiation received, how far the object 800 is away from the sensor arrangement 100. Likewise, it can be identified or determined, based on the electromagnetic radiation received, what speed the object 800 has (relative to the sensor arrangement 100). Likewise, it can be identified or determined, based on the electromagnetic radiation received, in which direction the object 800 is moving (relative to the sensor arrangement 100). It can be determined from at least one, or multiple, of these variables whether the object 800 (probably) will be caught in during a closing operation of the door 300. At least, a risk, or a probability, of the object 800 being caught in can be determined on the basis of one or several of the variables.

[0105] If getting caught is determined, or if a limit value of the probability of getting caught is exceeded, the closing operation of the door 300 can be interrupted or aborted. The sensor arrangement 100 can generate a signal. The signal can be transmitted to the control system of the door 300. Induced by the signal, the control system of the door 300 can change the control of the door 300, e.g., as mentioned, interrupt or abort the closing operation of the door.

[0106] A characteristic and/or a state of the door 300 can be included to identify or determine whether during the closing operation of the door 300 the object (probably) will be caught between the door 300 and the frame 500. Likewise, the characteristic and/or the state of the door 300 can be included to identify or determine whether a signal for changing the control of the door is generated.

[0107] For example, one characteristic of the door 300 is a closing speed, or a closing force, of the door. If the closing speed is high, a getting caught of the object can be predicted or determined also at a greater determined distance than if the closing speed is low. If the closing force is high, the consequence of getting caught (e.g., a risk of injury of a person) can be severe, so that the sensor arrangement 100 generates a signal for the control of the door 300 already in case of a lower risk of getting caught, or a lower probability of getting caught.

[0108] A state of the door 300 is, e.g., the degree of opening of the door 300. At identical distance and movement of an object 800 relative to the sensor arrangement 100, a getting caught, or a higher probability of getting caught, can be determined at a smaller degree of opening of the door 300 than at a larger degree of opening of the door 300.

[0109] FIG. 2a shows a door arrangement 1000. The door arrangement 1000 is similar to the door arrangement in FIGS. 1a and 1b, the door arrangement 1000 in FIG. 2a comprising two doors 300, 301. Each of the doors 300, 301 can be any door disclosed herein.

[0110] The doors 300, 301 can be doors of a means of transport, e.g., of a train or a bus. The doors 300, 301 are a two-wing design. The doors 300, 301 can be sliding doors.

[0111] The first door 300 comprises a safety strip 200. A sensor arrangement 100 is arranged in the safety strip 200, as described with respect to FIGS. 1a and 1b. The first door 300 can have a glass or a windowpane 400.

[0112] The second door 301 comprises a safety strip 201. A sensor arrangement 101 is arranged in the safety strip 201. The second door 301 can have a glass or a windowpane 401. Any of the doors disclosed herein can be the second door 301.

[0113] In FIG. 2a, the doors 300, 301 are closed. In the closed state, the safety strips 200, 201 of the first and the second door 300, 301 touch each other. Both safety strips can be (slightly) compressed due to that touching.

[0114] FIG. 2b shows the door arrangement 1000 in a state with open doors. The sensor arrangement 100 of the first door 300 and/or the sensor arrangement 101 of the second door 301 emit electromagnetic radiation into the monitored area. An object 800 can be located in the monitored area. The electromagnetic radiation can be reflected by the object 800. The radiation reflected by the object 800 can be received by the sensor arrangement 100 of the first door 300 and/or by the sensor arrangement 101 of the second door 301. Due to the electromagnetic radiation, the object can be detected, preferably as described in FIGS. 1a and 1b. In particular, the sensor arrangement 100 of the first door 300 and/or the sensor arrangement 101 of the second door 301 can determine or identify a position or a location, a distance between the respective sensor arrangement and the object, a speed of the object (relative to the respective sensor arrangement) and/or a direction of movement of the object (relative to the respective sensor arrangement).

[0115] Each of the sensor arrangements 100, 101 can generate a signal for a control of the respective door 300, 301. A movement of the respective door 300, 301 can be changed based on the signal or the signals. Likewise, a movement of the first and the second door 300, 301 can be changed based on the signal transmitted by only one of the sensor arrangements 100, 101.

[0116] FIG. 3a shows a schematic section through the safety strip 200. Moreover, FIG. 3a shows a schematic section through a section of the door 300.

[0117] The door 300 can comprise a fastening receiver 310. The safety strip 200 can be inserted into the fastening receiver 310 to connect the safety strip 200 to the door 300. The connection can be non-positive and/or positive. The connection can be detachable. The door 300 can have a first leg 320, and a second leg 330 at a front side. Also, the door 300 can have a first projection 340, and a second projection 350, preferably at the front side of the door 300. The fastening receiver 310 can be formed between the first leg 320 and the second leg 330. The first projection 340, and the second projection 350 can effect positive locking with the safety strip 200, in particular in the direction of the front side to which the safety strip 200 is fastened.

[0118] The safety strip 200 can have a fastening section 240. The fastening section 240 can be shaped complementary to the fastening receiver 310. The fastening section 240 can be insertable or pushable into the fastening receiver 310 to connect the safety strip 200 to the door 300. The fastening section 240 can have a dovetailed design. The connection between the safety strip 200 and the door 300 can be a dovetail connection. The safety strip 200 can be connected to the door 300 across its entire length.

[0119] The safety strip 200 can have a first receiving space 210. The first receiving space 210 can extend across the entire length of the safety strip 200. Alternatively, the first receiving space 210 can extend across the length of the safety strip 200 only in sections. In particular, the first receiving space 210 is open at two sides, or at not more than one side, with the opening, or openings, preferably being located at axial ends (in longitudinal direction). Perpendicular to the longitudinal extension of the safety strip 200, the first receiving space 210 can be without openings, i.e., have no opening, or be completely enclosed by the safety strip 200, or by the material of the safety strip 200.

[0120] The safety strip 200 can have a second receiving space 220. The second receiving space 220 can extend across the entire length of the safety strip 200. Alternatively, the second receiving space 220 can extend across the length of the safety strip 200 only in sections. In particular, the second receiving space 220 is open at two sides, or at not more than one side, with the opening, or openings, preferably being located at axial ends (in longitudinal direction). Perpendicular to the longitudinal extension of the safety strip 200, the second receiving space 220 can be without openings, i.e., have no opening, or be completely enclosed by the safety strip 200, or by the material of the safety strip 200.

[0121] The safety strip 200 can have a third receiving space 250. The third receiving space 250 can extend across the entire length of the safety strip 200. Alternatively, the third receiving space 250 can extend across the length of the safety strip 200 only in sections. In particular, the third receiving space 250 is open at two sides, or at not more than one side, with the opening, or openings, preferably being located at axial ends (in longitudinal direction). Perpendicular to the longitudinal extension of the safety strip 200, the third receiving space 250 can have at least one opening, preferably at least two or three openings.

[0122] The safety strip 200 can have a hollow space 230. The hollow space 230 can extend across the entire length of the safety strip 200. Alternatively, the hollow space 230 can extend across the length of the safety strip 200 only in sections. In particular, the hollow space 230 is open at two sides, or at not more than one side, with the opening, or openings, preferably being located at axial ends (in longitudinal direction). Perpendicular to the longitudinal extension of the safety strip 200, the hollow space 230 can have at least one opening, preferably at least two or three openings. Perpendicular to the longitudinal extension of the safety strip 200, the hollow space 230 can have at least one opening, preferably at least two or three openings. Perpendicular to the longitudinal extension of the safety strip 200, the hollow space 230 can be without openings, i.e., have no opening, or be completely enclosed by the safety strip 200, or by the material of the safety strip 200. Likewise, the hollow space 230 can be completely closed, i.e., have no opening, or be completely enclosed by the safety strip 200, or by the material of the safety strip 200.

[0123] FIG. 3b shows the safety strip 200 in a state in which it is connected to the door 300. The fastening section 240 of the safety strip 200 can be arranged in the fastening receiver 310 of the door 300.

[0124] The sensor arrangement 100 is arranged in the first receiving space 210. Due to the design of the first receiving space 210, electromagnetic radiation passes through the safety strip 200, or through the material of the safety strip 200, when the sensor arrangement 100 emits electromagnetic radiation into the monitored area. The receiving space 210 is arranged in particular between a fastening area of the safety strip 200, and a contact area of the safety strip 200. In this way, reliable reception of the sensor arrangement 100 can be ensured, and the other functions of the safety strip 200 can still be guaranteed. Also, electromagnetic radiation from the monitored area can pass through the safety strip 200, or through the material of the safety strip 200, when the sensor arrangement 100 receives electromagnetic radiation. Preferably, the first receiving space 210 is designed within the safety strip 200 in such a way that electromagnetic radiation from the sensor arrangement 100 into the monitored area and/or from the monitored area to the sensor arrangement 100 only (i.e., exclusively) passes through the material of the safety strip 200, or through the safety strip 200. If additional elements are arranged along the path of the electromagnetic radiation between the sensor arrangement 100 and the monitored area, part of the electromagnetic radiation might be absorbed and/or reflected, which might falsify the measurement.

[0125] A contact strip 270 can be arranged within the second receiving space 220. In the direction of a front side of the door 300, or the contact area of the safety strip 200, in particular the front side of the door 300 where the safety strip 200 is arranged or connected, the hollow space 230 can be arranged in front of the second receiving space 220. The hollow space 230 in front of the second receiving space 220 in which the contact strip 270 is arranged facilitates a deformation of the safety strip 200, or of the material of the safety strip 200. Due to this, the contract strip 270 can trigger at a lower force than without the hollow space 230. When the contract strip 270 triggers, at least one section of the safety strip 200 is compressed in such a way that an object has been, or is probable to have been, caught in. When it triggers, the contact strip 270 can send a signal to the control system of the door 300 based on which the movement of the door 300 is changed, e.g., a closing operation is interrupted or aborted.

[0126] A light curtain arrangement 280 can be arranged within the third receiving space 250. The light curtain arrangement 280 can be arranged within the third receiving space 250 in such a way that the light curtain arrangement 280 emits light into the monitored area, preferably in a wavelength range not visible to humans. A receiver for the light can be provided at a frame, or a door, located opposite the light curtain arrangement 280. The light curtain arrangement 280 can trigger when reception of the light is interrupted, e.g., by an object within the monitored area. When the light curtain arrangement 280 triggers, a signal can be sent to the control system of the door 300, based on which the movement of the door 300 is changed, e.g., a closing operation is interrupted or aborted.

[0127] The contact strip 270, the light curtain arrangement 280, the second receiving space 220, the third receiving space 250 and/or the hollow space 230 are optional.

[0128] FIG. 4 shows a schematic diagram of a sensor arrangement 100. The sensor arrangement 100 can comprise a receiving arrangement 110. The receiving arrangement 110 can comprise at least one antenna, preferably at least two antennae, more preferably at least three antennae, more preferably at least four antennae. Each of the antennae R1, R2, R3, R4 can receive electromagnetic radiation from the monitored area.

[0129] In the receiving arrangement 110, the distance between any two of the antennae R1, R2, R3, R4 can be a distance sR1 of between 0.1 to 0.9, or, especially preferred, of approximately half the wavelength of the electromagnetic radiation (approximately 0.5 times the wavelength of the electromagnetic radiation) in a first direction. Alternatively, or in addition, the distance between any two of the antennae R1, R2, R3, R4 can be a distance sR2 of between 0.1 to 0.9, or, especially preferred, of approximately half the wavelength of the electromagnetic radiation (approximately 0.5 times the wavelength of the electromagnetic radiation) in a second direction. The first direction can be not in parallel with, in particular perpendicular to, the second direction.

[0130] The sensor arrangement 100 can comprise a transmitting arrangement 120. The transmitting arrangement 120 can comprise at least one antenna, preferably at least two antennae, more preferably at least three antennae. Each of the antennae T1, T2, T3 can emit electromagnetic radiation into the monitored area.

[0131] In the transmitting arrangement 120, the distance between any two of the antennae T1, T2, T3 can be a distance sT1 of between 0.6 to 1.5, or, especially preferred, of approximately one times the wavelength of the electromagnetic radiation (approximately 1.0 times the wavelength of the electromagnetic radiation) in a first direction. Alternatively, or in addition, the distance between any two of the antennae T1, T2, T3 can be a distance sT2 of between 0.6 to 1.5, or, especially preferred, of approximately one times the wavelength of the electromagnetic radiation (approximately 1.0 times the wavelength of the electromagnetic radiation) in a second direction. The first direction can be not in parallel with, in particular perpendicular to, the second direction.

[0132] The sensor arrangement 100 can comprise a controller 130. The controller 130 can be set up to control the sensor arrangement 100. In particular, the controller 130 is set up to control the transmitting arrangement 120. The emission of electromagnetic radiation into the monitored area can be controllable by the controller 130. In particular, the controller can receive signals from a further control system, which signal that an opening or closing operation of the one, or multiple, doors shall start, and that activation of the sensor arrangement 100 is necessary. The controller 130 can be set up to edit and/or evaluate signals from the receiving arrangement 110. Alternatively, the controller 130 can be located outside of the sensor arrangement 100.

[0133] The sensor arrangement 100 can comprise a power supply system 140. The power supply system 140 can supply energy, in particular electric energy, to the sensor arrangement 100. The power supply system 140 can comprise a battery or a rechargeable battery. The power supply system 140 can be set up to receive electric power wirelessly, e.g., by means of induction. Alternatively, or in addition, the power supply system 140 can be connected to a power supply outside of the safety strip 200. The connection can be a hardware-based connection, e.g., wiring.

[0134] The sensor arrangement 100 can comprise a data interface 150. The data interface 150 can be set up to transmit data to outside of the safety strip 200 wirelessly or by wire. Alternatively, or in addition, the data interface 150 can be set up to receive data from outside of the safety strip 200 wirelessly or by wire. In particular, the data interfaces 150 is connected to a control system of the door.

[0135] The sensor arrangement 100 can comprise a memory 160. The memory 160 can comprise a volatile memory and/or a non-volatile memory. Data from the receiving arrangement 110 can be stored in the memory 160. An algorithm, or multiple algorithms, for evaluating data in the memory 160, in particular data from the receiving arrangement 110, can be stored in the memory 160.

[0136] FIG. 5a to 5d show measurements by the sensor arrangement 100 of a door arrangement 1000. In FIG. 5a, at least one door is open, in particular both doors. The sensor arrangement 100 emits electromagnetic radiation into the monitored area and receives electromagnetic radiation from the receiving area. No object (to be detected) is located within the monitored area.

[0137] The measurement is visualized in FIG. 5b to 5c. FIG. 5b shows a diagram on the basis of the electromagnetic radiation received. An angle in degrees (°) is plotted against a distance in meters (m). Different signal intensities in decibels (dB) are indicated by areas of different color or shading. In FIG. 5b, the angle is an azimuth angle.

[0138] FIG. 5b shows several areas of relatively high signal intensity. These areas are caused by reflections of the electromagnetic radiation emitted by the sensor arrangement 100. For example, an area 810 of high signal intensity is formed at a distance of approximately 1.6 m over an azimuth angle range of approximately −20° to more than 80°. This area can be caused by a reflection of the electromagnetic radiation at the floor of the door, e.g., at the floor of a bus or a train. Furthermore, an area 820 of high signal intensity is formed at a distance of approximately 0.7 m over an azimuth angle range of approximately −40° to approximately 30°. This area can be caused by a reflection of the electromagnetic radiation at a grab element, e.g., a grab pole, in the door area.

[0139] FIG. 5c shows a diagram similar to that in FIG. 5b, the angle in FIG. 5c being an elevation angle. FIG. 5c again shows several areas of higher signal intensity. For example, an area 811 of high signal intensity is formed at a distance of approximately 1.6 m and an elevation angle range of approximately 0° to more than 80°. Again, this area can be caused by a reflection of the electromagnetic radiation at the floor of the door.

[0140] FIG. 5d shows a diagram similar to that in FIGS. 5b and 5c, with the speed in meters per second (m/s) being plotted against the distance in meters (m). The diagram is marked “Doppler”, because the speed measurement is based on the Doppler effect. Only low speeds (negative and positive speeds) are visible in the scenario of FIG. 5a.

[0141] The signals, as shown in FIG. 5b to 5d, can be regarded as background. If no object 800 to be detected is located within the monitored area, i.e., if the monitored area is free from objects 800 to be detected, a measurement by the sensor arrangement 100 results as shown in FIG. 5b to 5d. The background can be deducted in a further measurement, or be taken into account in a further measurement, to improve the detection of objects to be detected. The background can be an object to be detected.

[0142] FIG. 6a to 6d show a measurement by the sensor arrangement 100 where an object 800 to be detected is located within the monitored area. The object 800 is moving away from the sensor arrangement 100. In the diagram in FIG. 6b, an area 800b with a higher signal intensity is visible, which is in addition to the diagram in FIG. 5b. The area 800b is formed at a distance of approximately 0.6 m and an azimuth angle range of approximately −25° to approximately 0°. This area 800b is caused by a reflection of the electromagnetic radiation at the object 800 to be detected.

[0143] Analogously, an area 800b is visible in the diagram in FIG. 6c, which is in addition to the diagram in FIG. 5c. This area is formed at a distance of approximately 0.6 m and an elevation angle of approximately 0° to approximately 60°. Again, the area 800c is caused by a reflection of the electromagnetic radiation at the object 800 to be detected.

[0144] In FIG. 6d, an area 800d of increased signal intensity is formed at a distance of approximately 0.6 m and a speed of approximately 0.5 m/s, which is due to the reflection of the electromagnetic radiation at the object 800 to be detected. The positive speed indicates that the object 800 is moving away from the sensor arrangement 100.

[0145] FIG. 7a to 7d show a measurement by the sensor arrangement 100 where an object 800 to be detected is located within the monitored area. The object 800 is moving in the direction of the sensor arrangement 100, i.e., the object 800 is moving towards the sensor arrangement 100.

[0146] An area 800b at a distance of approximately 0.4 m and an azimuth angle range of approximately −60° to approximately 20° is visible in FIG. 7b, an area 800c at a distance of approximately 0.4 m and an elevation angle range of approximately 0° to more than 80° is visible in FIG. 7c, and an area 800d at a distance of approximately 0.4 m and a speed of approximately −0.5 m/s is visible in FIG. 7d. The areas 800b, 800c, and 800d are caused by the object to be detected. The negative speed indicates that the object 800 to be detected is moving in the direction of the sensor arrangement 100, i.e., is moving towards the sensor arrangement 100.

[0147] The location of an object 800, a distance of the object 800 to the sensor arrangement 100, a speed of the object 800 relative to the sensor arrangement 100 and/or a direction of movement of the object relative to the sensor arrangement 100 can be determined from the measurement by the sensor arrangement 100. Due to this, a monitored area can be monitored especially well.

[0148] In principle, the measurement can be performed with the following steps. The controller can be set up to carry out the following steps. One or several of the steps can be optional.

[0149] The sensor arrangement can emit electromagnetic radiation, preferably within a wide solid angle range, by means of at least one antenna (transmitting antenna). The solid angle range can be at least 30°, at least 45°, at least 60°, at least 75°, or at least 90°.

[0150] Reflected electromagnetic radiation can be received by the sensor arrangement by at least two antennae (receiving antennae). Each of the antennae can be a transmitting antenna and/or a receiving antenna.

[0151] A signal preparation can be applied to the electromagnetic radiation received, in particular to a signal that is based on the electromagnetic radiation received. The signal preparation can comprise one or multiple filters. The signal can comprise the totality of all variables, e.g., for different receiving antennae.

[0152] The signal received can be resolved into intermediate information. Intermediate information can be, e.g., distances, angles, speeds and/or signal intensities and/or other, possibly abstracted, variables. The variables can enable subsequent classification of objects, e.g., as regards their type, state and/or relevance and/or additional classes. Examples of variables include “type”, “state” and/or “relevance” and/or the additional classes. The classes can be subdivided into at least two subclasses. For example, “type” can be subdivided into, e.g., [“person”, “door” ], or “state” can be subdivided into, e.g., [“moves towards door”, “moves away from door”, “does not move” ], or “relevance” can be subdivided into, e.g., [“relevant”, “not relevant” ].

[0153] The application scenario and/or the classification of objects in the scenario can be analyzed, e.g., on the basis of the direct and/or abstracted intermediate information from the step described previously. The scenario can subsequently be interpreted. A signal describing the scenario can be triggered, e.g., by the controller. For example, when monitoring a closing door and an approaching person, the signal can be a signal that can be used to abort the closing operation of the door. The scenario can be interpreted algorithmically. To interpret the scenario, an algorithm can be used that learns from data. In particular, machine learning, e.g., supervised machine learning, unsupervised machine learning, reinforcement learning, can be used for learning.

[0154] FIG. 8a shows a door 300 with a safety strip 200. A sensor arrangement 100 is arranged in the safety strip 200. FIG. 8a shows a schematic top view of the door 300. The top view shows the door in a plane perpendicular to the direction of gravitation, or in parallel with a floor.

[0155] When the sensor arrangement 100 emits electromagnetic radiation, a monitored area 900 results. The sensor arrangement 100 can be designed in such a way that the electromagnetic radiation is emitted in a wide solid angle, or solid angle range. In this way, an entrance and/or exit area can be monitored especially well, because the monitored area is relatively large. The solid angle, or solid angle range, can be at least 30°, at least 45°, at least 60°, at least 75°, or at least 90°. The solid angle, or solid angle range, can extend perpendicular to the direction of gravitation, or in parallel with the floor.

[0156] FIG. 8b shows a two-wing door arrangement. A side view of the door arrangement is shown. The side view can be oriented perpendicular to the floor, or in parallel with the direction of gravitation.

[0157] A first door 300 comprises a safety strip 200. The safety strip 200 of the first door 300 comprises a sensor arrangement 100. A second door 301 comprises a safety strip 201. The safety strip 201 of the second door 301 comprises a sensor arrangement 101.

[0158] The sensor arrangement 100 of the first door 300 and the sensor arrangement of the second door 301 can emit electromagnetic radiation into the respective monitored area 900, 901. Each of the sensor arrangements 100, 101 can emit electromagnetic radiation into the monitored area in a wide solid angle, or solid angle range. The solid angle, or solid angle range, can be at least 30°, at least 45°, at least 60°, or at least 75°. The solid angle, or solid angle range, can extend in the direction of gravitation, or perpendicular to the floor.

[0159] At least one of the monitored areas 900, 901, or each of the monitored areas 900, 901, can extend over a height of at least 30%, preferably at least 50%, more preferably at least 70%, more preferably at least 80% of the total height or total length of the respective safety strip 200, 201.

[0160] A monitored area 900, 901 can extend from the safety strip 200, 201, in which the associated sensor arrangement 100, 101 is arranged, up to an opposite frame or an opposite door.