Alarm system, in particular a self-controlling, further in particular self-sufficient alarm system, one or more tailboard lights

Abstract

The invention relates to an alarm system, in particular a self-controlling, further in particular self-sufficient alarm system, one or more tailboard lights, one or more tailboard lights which are wirelessly connected to one another in such a way that one tailboard light takes on the role of a master and the other tailboard light(s) takes on the role of a slave, wherein the tailboard light which first detects a passing vehicle or other object, regardless of the direction from which it is driven, emits an alarm signal if one should be triggered and forwards it to the other tailboard lights, and the tailboard light which therefore first detects a danger is the master, the others which come after it or which detect later are the respective slave.

Description

[0001] The present invention relates to an alarm system, in particular a self-controlling, further in particular autonomous alarm system of one or more loading platform lights for mounting on a loading platform, as well as a loading platform system and a method for controlling and / or regulating a loading platform system according to the respective preambles of claims 1, 10 and 11.

[0002] DE 10 2020 005 818 A1 discloses a charging recess for an electrical charging interface of an electrically powered vehicle, comprising at least one recess body which has an opening for receiving the charging interface; and a charging flap which is pivotally connected to the recess body and which is provided for closing and opening the opening of the recess body. At least one motion sensor and at least one lighting device are provided, which can be activated at least when an object approaches the motion sensor, at least when the charging flap is open or unlocked.

[0003] FR 3 043 608 A1 discloses a device comprising a housing consisting of a base with means for its attachment to the vehicle and a translucent cover mounted on the base. The housing includes at least a first and a second compartment, arranged opposite a first and a second zone of the cover, respectively, and separated from each other. The first compartment includes at least one first light source with a first lighting function in the form of a work light, with which a work area can be illuminated. The second compartment includes at least one second light source with a second lighting function that differs from the first lighting function, for example, a reminder function for the vehicle's rear light.

[0004] DE 10 2015 010 181 A1 discloses a loading platform light for mounting on a loading platform, comprising an electrically operated light source and a housing, wherein the electrically operated light source is at least partially stored detachably or permanently in a storage compartment of the housing, wherein the housing has a top surface and a mounting surface, and the mounting surface is designed and intended to be detachably or permanently mounted on the loading platform, and the top surface is connected to the mounting surface via at least one side surface, wherein the side surface has at least one opening through which electromagnetic radiation emitted by the electrically operated light source can be at least partially discharged from the housing, wherein the light source has a power consumption of at most 3 W and / or a current consumption of at most 300 mA at a supply voltage of at least 10 V and at most 30 V.

[0005] The present invention shows a self-controlling and autonomous alarm system for one or more on-board lights for accident prevention.

[0006] Lowered loading platforms of trucks often pose a very great danger to traffic, especially when loading and unloading a lowered loading ramp, rear-end collisions with passing cars are often caused.

[0007] A loading platform light described here may have a sensor unit, in particular a distance sensor, which detects passing vehicles or other moving objects and, in the event of excessive proximity, especially in the event of a proximity of less than one meter, emits an audible alarm and / or a visual alarm.

[0008] A loading platform, however, has two or more lights mounted at its corners. If all of them emit a sound simultaneously or in a pattern difficult for a human to discern, the unloader or a passing driver cannot determine which of the lights, when the platform is lowered, is closest to the person and which is farther away. The system is designed so that the lights automatically coordinate their signals, ensuring that at least the nearest light emits a distinctive signal, such as the loudest, to warn the unloader of the passing person and / or, conversely, to warn the passing person of the corners and edges of the lowered platform.

[0009] The individual loading platform lights are wirelessly connected in such a way that one light acts as the master, while the other(s) are the slave(s). The first light to detect a passing vehicle or other object, regardless of its direction, relays this alarm signal, if one should be triggered, to the other lights.

[0010] The loading platform light that detects the hazard first is the master; the others that detect it later are the slaves. In other words, the passing object is initially closest to the master loading platform light. This light therefore emits the loudest or most alarming tone, color, or light. The design also stipulates that this master loading platform light will then automatically control the other lights, significantly reducing the reaction time until the alarm is triggered and ensuring precise control of the remaining loading platform lights.

[0011] The others, in at least one embodiment, are either fully synchronized with the sound or emit a mitigating sound or color, for example, instead of a bright, flashing red light (master light), a more yellow light, in order to give an alarm signal to the passing vehicle, but especially also to the loading and unloading person of the truck, to jump aside.

[0012] This master-slave configuration, together with the motion sensor, overcomes the disadvantage of eliminating the need for a central control unit in the truck. Instead, depending on the location and positioning of the object entering the danger zone, the respective loading platform light emits the strongest signal. This also helps the truck driver orient themselves, as they are trained to recognize which loading platform light emits the strongest or potentially most dangerous signal and can then react quickly by jumping aside.

[0013] This was previously impossible. To put it bluntly, truck drivers were often simply run over because they didn't know where the danger was coming from. Back then, simply jumping aside often resulted in the truck driver jumping directly into the danger. The master-slave configuration therefore implements an orientation function.

[0014] According to the invention, the alarm system, in particular the self-controlling, and further in particular the autonomous alarm system, comprises one or more loading platform lights which are wirelessly connected to each other in such a way that one loading platform light assumes the role of a master and the other(s) loading platform lights assume the role of a slave, wherein the loading platform light which first detects a passing vehicle or other object, regardless of the direction from which it is detected, emits an alarm signal, if one should be triggered, and forwards it to the other loading platform lights, and the loading platform light which therefore first detects a danger is the master, the others which come after, or which detect later, are the respective slaves.

[0015] According to the invention, the loading platform lights organize themselves by means of mutual signal coordination so that at least the nearest loading platform light emits a signal characteristic for the user, for example the loudest, in order to warn the unloader of the passing person and / or vice versa of the passing person of corners and edges of the lowered loading platform wall.

[0016] The loading platform light described here for mounting on a loading platform comprises an electrically operated light source and a housing, wherein the electrically operated light source is at least partially stored in a storage compartment of the housing, either detachably or permanently, wherein the housing has a top surface and a mounting surface, and the mounting surface is designed and intended to be detachably or permanently mounted on the loading platform.

[0017] The top surface is connected to the mounting surface via at least one side surface, the side surface having at least one opening through which electromagnetic radiation emitted by the electrically operated light source can be at least partially vented from the housing.

[0018] However, such loading platform lights are already known from the prior art. In any case, loading platform lights are known which – as described above – also emit light from their side surfaces.

[0019] However, existing on-board lights known from the state of the art exhibit, among other things, a particularly high energy consumption.

[0020] Therefore, in order to provide a cargo light with minimized power consumption, the present invention makes use, among other things, of the idea of ​​using a light source in the cargo light which has a power consumption of at most 3W and / or a current consumption of at most 300 mA at a supply voltage of at least 10 volts and at most 30 volts. For example, the light source has a current consumption of at least 100 mA and at most 125 mA at a supply voltage of 24 volts.

[0021] A lower current draw and therefore also a lower power consumption of the light source ensures that, on the one hand, the entire charging station light heats up less during operation and, on the other hand, has a minimized energy consumption.

[0022] According to at least one embodiment, the loading platform light for mounting on a loading platform comprises an electrically operated light source and a housing, wherein the electrically operated light source is at least partially detachably or permanently stowed in a storage compartment of the housing, wherein the housing has a top surface and a mounting surface, and the mounting surface is designed and intended to be detachably or permanently mounted on the loading platform, and the top surface is connected to the mounting surface via at least one side surface, wherein the side surface has at least one opening through which electromagnetic radiation emitted by the electrically operated light source can be at least partially discharged from the housing.According to at least one embodiment, the light source has a power consumption of at most 3W and / or a current consumption of at most 300 mA at a supply voltage of at least 10 volts and at most 30 volts.

[0023] According to at least one embodiment, electromagnetic radiation escapes only through the opening in the housing, wherein the opening in the side surface comprises at least 20% of the total surface area of ​​the side surface and the light source is at least partially exposed through the opening. In other words, a user can visually identify, for example, a side surface of the light source and, in particular, also a light-emitting surface of the light source from the outside.

[0024] According to at least one embodiment, the housing is frustoconical in shape such that the top surface has a smaller area than the mounting surface, and preferably, one side surface is inclined at least 10° to a surface normal of the top surface and / or the mounting surface. This ensures that the projection of the side surface in the direction of the surface normal of the top surface is always large enough that a user looking at the loading platform light in the direction of the surface normal of the top surface and / or the mounting surface will still perceive the illumination of a light source. In other words, this inclination of the side surface to the surface normal of the top surface and / or the mounting surface ensures that such a projection area is large enough to be adequately perceived at all times by an observer standing behind the loading platform light.

[0025] According to at least one embodiment, the electrically operated light source comprises at least one planar light guide and at least one light source, preferably an LED, wherein the light source is arranged on the light guide such that electromagnetic radiation emitted by the light source is at least partially coupled into the planar light guide. For example, the light source, and in particular an emission surface of the light source, is arranged without a gap on the planar light guide. Alternatively, however, a gap, for example at least partially filled with an ambient medium (e.g., air), can also be formed between the LED and the light guide. The distance, and thus the gap dimension, between the LED and the light guide can be between 0.2 and 5 mm, preferably between 0.8 and 1.2 mm, for example 1 mm.Furthermore, a light-guiding and / or light-refracting medium can be placed in the gap between the LED and the light guide. The flat light guide can be a translucent and / or light-guiding plastic element.

[0026] According to at least one embodiment, the loading platform light described here comprises control and / or regulation electronics, which are at least partially integrated into the housing and are configured and intended to operate the light source. In this respect, these control and regulation electronics are "on-board" control and regulation electronics, which, instead of being located separately from the loading platform light, are installed particularly compactly within the loading platform light.

[0027] For example, the control electronics include a light / dark sensor which regulates the current and / or voltage supply to the light source depending on the ambient brightness. For instance, the sensor detects approaching darkness and therefore supplies the light source with more electrical energy (higher current and / or voltage) so that the light source shines brighter. Alternatively, it is also conceivable that, conversely, the sensor supplies the light source with more electrical energy the greater the sunlight on the cargo light, and thus on the sensor itself. This can ensure that the cargo light is always easily visible, even in bright daylight. This makes it particularly easy to ensure that the cargo light is always bright enough. Conversely, the light / dark sensor can also be used to dim the light source.

[0028] The control electronics can also include a memory element that stores the operating history of the light source. This memory element can include a read and / or read interface. Using the read interface, the operating history of the light source (usage duration, resistance, etc.) can be displayed to an evaluator via an external evaluation element.

[0029] The data input interface allows data to be fed into the control and / or regulation electronics using an external programming device, according to an externally selected or programmed operating program.

[0030] Furthermore, it is conceivable that the on-board light is not wired, but rather that the light source and / or the control and / or regulation electronics are supplied with electrical energy by means of a battery installed in or with the housing, for example with a rechargeable battery.

[0031] According to at least one embodiment, the electromagnetic radiation generated by the light source is coupled out of the cargo light only via at least one side surface of the planar light guide. This ensures that the electromagnetic radiation generated by the light source is guided out of the cargo light in a leak-free and targeted manner.

[0032] According to at least one embodiment, at least one seal is arranged between the flat optical fiber and an inner wall of the housing, either detachably or permanently, preferably on the flat optical fiber itself, wherein the seal provides a watertight seal for a cavity formed between the flat optical fiber and the inner wall of the housing. For example, the light source and / or the control and / or regulation electronics and / or the aforementioned sensors are arranged in this cavity.

[0033] Preferably, the seal is a circumferential seal that completely surrounds the flat optical fiber and is free of defects and interruptions. This effectively prevents water from penetrating between the inner wall of the housing and the flat optical fiber.

[0034] According to at least one embodiment, cavities between the housing, the planar light guide, and / or connection points for the power supply of the light source are preferably filled, at least partially, with a potting compound, preferably without bubbles. "Bubble-free" in this context means that, within the manufacturing tolerances, the potting compound has no bubbles in its cured state.

[0035] In particular, it is conceivable that a power supply cable is preferably only attached to connection points of the flat-designed light guide for the power supply of the light source by means of a screw mechanism instead of being mounted by means of a potting of an intermediate space between such a connection point of the flat-designed light guide and an end of the charging cable.

[0036] In other words, such a hardened potting material forms a sufficiently rigid and mechanical connection between the charging cable and such a connection point.

[0037] Furthermore, the application described herein relates to a tail lift system comprising at least one tail lift and at least one tail lift light according to at least one of the preceding claims. This means that all features disclosed for the tail lift described above are also disclosed for the tail lift system described herein, and vice versa.

[0038] In particular, the loading platform system described here has a central control unit which is connected to the control and / or regulation electronics of the loading platform light by means of wired and / or radio communication and wherein the central control unit controls and / or regulates the loading platform light depending on an inclination angle of the loading platform relative to the horizontal according to an operating program which is stored and / or programmed in the central control unit.

[0039] The term "horizontal" therefore refers to a direction that is parallel to a circumferential direction of the Earth.

[0040] In other words, the central control described here regulates and / or controls at least one loading platform light in a particularly simple and cost-effective manner, depending on the operation of the loading platform.

[0041] For example, the central control unit includes a light / dark sensor that regulates the current and / or voltage supply to the light source in the cargo area light depending on the ambient light level. For instance, the sensor detects incoming darkness and therefore supplies the light source with more electrical energy (higher current and / or voltage) so that the light source shines brighter. Alternatively, it is also conceivable that, conversely, the sensor supplies the light source with more electrical energy the greater the sunlight on the cargo area light, and thus on the sensor itself. This can ensure that the cargo area light is always easily visible, even in bright daylight. This makes it particularly easy to ensure that the cargo area light is always bright enough. Conversely, the light / dark sensor can also be used to dim the light source.

[0042] The central control unit can also include a memory element that stores the operating history of the light source. This memory element can include a read and / or read interface. Using the read interface, the operating history of the light source (error logs, error signaling, operating time, resistance, etc.) can be displayed to an evaluator via an external evaluation unit.

[0043] The data input interface allows an external programming device to feed data into the control and / or regulation electronics according to an externally selected or programmed operating program. The central control unit can also implement short-circuit monitoring of the tail lift system.

[0044] Furthermore, it is conceivable that the central control unit is not wired, but is supplied with electrical energy by means of a battery installed in or with the central control unit, for example with a rechargeable battery.

[0045] Furthermore, the registration described here concerns a procedure for controlling and / or regulating a loading platform system.

[0046] The method for operating an alarm system, in particular a self-controlling, and further, in particular an autonomous alarm system, of one or more loading platform lights, comprises one or more loading platform lights that are wirelessly interconnected in such a way that one loading platform light assumes the role of a master and the other(s) loading platform lights assume the role of a slave, wherein the loading platform light that first detects a passing vehicle or other object, regardless of its direction, emits an alarm signal, if one were to be triggered, and forwards it to the other loading platform lights, and the loading platform light that therefore first detects a danger is the master, the others that come after or detect later are the respective slaves, wherein the loading platform lights organize themselves by means of mutual signal coordination.that at least the nearest loading platform light emits a signal characteristic of the user, for example, the loudest one, to warn the unloader of the passing person and / or vice versa of the passing person of corners and edges of the lowered loading platform.

[0047] The following section describes in more detail the loading platform light, the loading platform system described here, and a corresponding method for controlling and / or regulating the loading platform system using respective exemplary embodiments.

[0048] Fig. Figure 1 shows the alarm system 1000, in particular the self-controlling, further in particular the autonomous alarm system 1000, one or more loading platform lights 100, which are wirelessly connected to each other in such a way that one loading platform light 100 assumes the role of a master M100 and the other loading platform lights 100 assume the role of a slave S100, wherein the loading platform light 100 that first detects a passing vehicle or other object, regardless of the direction, emits an alarm signal, if one should be triggered, and forwards it to the other loading platform lights 100, and the loading platform light 100 that therefore first detects a danger is the master M100, the others that come after, or that detect later, are the respective slave S100. Furthermore, it shows Fig. 1, that the loading platform lights 100 organize themselves by means of mutual signal coordination so that at least the nearest loading platform light 100 emits a signal characteristic for the user, for example the loudest, in order to warn the unloader of the passing person and / or vice versa of the passing person of corners and edges of the lowered loading platform 1. In the Fig. 2A - 2D are schematic perspective views of individual elements of the loading platform light or the finished loading platform light (see Fig. 2C) shown in schematic figures. In the Fig. Figure 3 shows a block diagram of a loading platform system described herein, which is operated by means of a method described herein.

[0049] In the figures, identical or equivalent components are each marked with the same reference symbols. The elements shown here are not to scale; rather, individual elements may be exaggerated for clarity.

[0050] In the Fig. Figure 2A shows a schematic perspective view of an embodiment of a loading platform light 100 described here for mounting on a loading platform 1.

[0051] As from the Fig. 2A, the loading platform light 100 described therein comprises an electrically operated light source 2 and a preferably radiation-impermeable and further preferably metallic housing 3, wherein the electrically operated light source 2 is detachably stowed in a storage compartment 31 of the housing 3.

[0052] In particular, the housing 3 has a cover surface 32 and a mounting surface 33, wherein the mounting surface 33 is designed and intended to be detachably or indetachably mounted on the loading platform 1, and the cover surface 32 is connected to the mounting surface 33 via at least one side surface 34, wherein the side surface 34 has at least one opening 340 through which electromagnetic radiation emitted by the electrically operated light source 2 can be at least partially discharged from the housing 3.

[0053] Therefore, it can be easily seen that the electromagnetic radiation escapes only through the opening 340 in the housing 3.

[0054] Furthermore, the area of ​​the opening 340 in the side surface 34 is at least 20% of the total area of ​​the side surface 34, wherein the inclination of the side surface 34 to a surface normal N of the cover surface 32 and the mounting surface 33 is at least 10°.

[0055] In other words, a side surface 210 of the planar light guide 21 is at least partially visible from the outside and emits the electromagnetic radiation generated by a light source 22 of the light source 2 via its lateral light coupling surface.

[0056] In particular, the opening 340 in the housing 3 is formed into two separate openings separated from each other by a central web M340. The central web M340 is therefore part of the side surface 340 and extends continuously from the top surface 32 obliquely towards the mounting surface 33, thus dividing the opening 340 as seen in its entirety into the two partial openings.

[0057] The central web M340 therefore enables, in a particularly simple manner, both the protection of the side surface 210 of the planar light guide 21 and the possibility of extending the opening 340 to a particularly large area without compromising the mechanical stability of the housing 3. In this respect, an opening 340 designed in this way, subdivided only by a web M340 as described above, ensures that the side surface 34 is otherwise free of any further openings for the emission of electromagnetic radiation.

[0058] Furthermore, it should also be noted that both the top surface 32 and the mounting surface 33 are likewise free of such openings through which electromagnetic radiation can pass.

[0059] In the Fig. Figure 2B shows a schematic view of an inner wall of the housing 3. The inner wall of the housing 3 therefore forms a cavity H within the housing 3, within which a control and / or regulation electronics 4 for operating the light source 22 of the planar optical fiber is arranged.

[0060] Furthermore, the cavity H is sufficiently large to accommodate at least part of the planar optical fiber 21. For example, the cavity H is essentially rectangular and has lateral dimensions of at least 45 mm and at most 65 mm.

[0061] Furthermore, it can be seen that the cavity H has further recesses A1 to A4, which extend from an inner edge H1 of the cavity H in a direction away from a center point M of the cavity H. These recesses A1 to A4 are therefore elongated and thus form depressions in the inner wall of the housing 3.

[0062] The Fig. 2C shows a corresponding front view of the one in the Fig. 2A and Fig. 2B shown housing 3. In the Fig. 1D are respective lateral sectional views of the objects in the Fig. Section lines shown in 2C.

[0063] In the Fig. Figure 2D shows a schematic perspective view of an embodiment of an electrically operated light source 2 described herein. The electrically operated light source 2 has a planar light guide 21 and a light source 22, which is in the form of an LED and whose light is coupled into the light guide 21. The light source 22 is supplied with electrical energy via a power cable 35.

[0064] According to the Fig. The cutouts shown in 2B, A1 to A4, show the Fig. 2C and the flat-shaped light guide 21 described therein, with projections V1 to V4 that fit precisely and can be uniquely assigned to the respective recesses A1 to A4, which can preferably be pressed into the respective recesses A1 to A4 of the housing 3 by hand or mounted in another way.

[0065] A seal 5 circumferentially runs along the edge of the flat light guide 21, thus creating a watertight connection between the flat light guide 21 and the inner wall of the housing 3 during the pressing of the projections V1 to V4 into the respective recesses A1 to A4.

[0066] In the Fig. Figure 3 shows a schematic drawing of a control system for a loading platform system 200, wherein the loading platform system 200 comprises at least one loading platform 1, and the loading platform light 100 is detachably attached to the loading platform 1 via the mounting surface 33 of the loading platform light 100. According to at least one embodiment, the loading platform system 200 comprises the Fig.3 a central control unit 220, which is connected to the control and / or regulation electronics 4 of the tailgate light 100 by means of wired and / or wireless communication, and wherein the central control unit 220 controls and / or locks the tailgate light 100 depending on an inclination angle of the tailgate relative to the horizontal according to an operating program which is stored and / or programmed in the central control unit 220. In this respect, a method 300 for controlling and / or regulating a tailgate system 200 is also described.

[0067] The invention is not limited by the description of the exemplary embodiment. Rather, the invention encompasses every new feature as well as every combination of features, which also includes in particular every combination of the patent claims, even if this feature or this combination itself is not explicitly specified in the patent claims or in the exemplary embodiment. Reference symbol list A1 - A4 cutouts V1 - V4 Advantages H cavity H1 inner boundary 1 loading ramp 2 light bulbs 3 cases 4 Control electronics 5 Seal 6 connection points 21 fiber optic cables 22 Light source 31 storage space 32 Cover area 33 Mounting area 34 side surface 35 power cables 100 Loading platform light 200 tail lift system 210 side area 220 Central control 300 procedures 340 opening M340 Bridge 1000 alarm system M100 Master S100 Slave

Claims

[1] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, one or more loading platform lights (100), comprising - one or more charging board lights (100) which are wirelessly connected to each other in such a way that one charging board light (100) assumes the role of a master (M100) and the other charging board lights (100) assume the role of a slave (S100), wherein the The loading platform light (100) which first detects a passing vehicle or other object, regardless of direction, emits an alarm signal if one should be triggered, and forwards it to the other loading platform lights (100), and The on-board light (100) that detects a hazard first is the master (M100), the others that come after it, or that detect later, are the respective slaves (S100), characterized by , that The loading platform lights (100) organize themselves by mutual signal coordination so that at least the nearest loading platform light (100) emits a signal characteristic for the user, for example the loudest, to warn the unloader of the passing person and / or vice versa of the passing person of corners and edges of the lowered loading platform (1). [2] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, of one or more loading platform lights (100), comprising an electrically operated light source (2), and a housing (3), wherein the electrically operated light source (2) is at least partially stowed in a storage compartment (31) of the housing (3) in a detachable or non-detachable manner, wherein the housing (31) has a cover surface (32) and a mounting surface (33), and the mounting surface (33) is designed and intended to be detachably or permanently mounted on the loading ramp (1), and the cover surface (32) is connected to the mounting surface (33) via at least one side surface (34), wherein the side surface (34) has at least one opening (340) through which electromagnetic radiation emitted by the electrically operated light source (2) can be at least partially discharged from the housing (3), characterized by , that the light source (2) has a power consumption of no more than 3W and / or a current consumption of no more than 300 mA at a supply voltage of at least 10V and at most 30V. [3] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, of one or more loading platform lights (100) according to claim 1, characterized by, that the electromagnetic radiation escapes only through the opening (340) in the housing (3), and that the opening (340) in the side surface (34) is at least 20% of the total area of ​​the side surface (34), and that the light source (2) is at least partially exposed through the opening (340). [4] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, of one or more loading platform lights (100) according to claim 1 or 2, characterized by , that the housing (31) is designed in a frustoconical shape such that the cover surface (32) has a smaller area than the mounting surface (33), and wherein preferably the inclination of the side surface to a surface normal of the cover surface (32) and / or the mounting surface (33) is at least 10 degrees. [5] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, of one or more on-board lights (100) according to at least one of the preceding claims, characterized by , that the electrically operated light source (2) comprises at least one planar light guide (21) and at least one light source (22), preferably an LED, wherein the light source (22) is arranged on the light guide (21) in such a way that the electromagnetic radiation emitted by the light source (22) couples at least partially into the planar light guide (21). [6] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, of one or more loading board lights (100) according to the preceding claim, characterized bya control and / or regulation electronics (4) which is at least partially integrated into the housing (31), and wherein the control and / or regulation electronics (4) is set up and intended to operate the light source (22). [7] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, of one or more on-board lights (100) according to at least one of the preceding claims, characterized by , that the electromagnetic radiation generated by the light source (22) is coupled out of the onboard light (100) only via at least one side surface (210) of the planar light guide (21). [8] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, of one or more on-board lights (100) according to at least one of the preceding claims, characterized by, that at least one seal (5) is arranged detachably or indetachably around the edge of the light guide (1) between the planar light guide (21) and an inner wall of the housing (3), wherein the seal (5) seals a cavity (32) formed between the planar light guide (21) and the inner wall of the housing (3) in a watertight manner. [9] Alarm system (1000), in particular a self-controlling, further in particular an autonomous alarm system, of one or more on-board lights (100) according to at least one of the preceding claims, characterized by , that cavities (H) between the housing (3), the planar light guide (21) and / or connection points (6) for the energy supply of the light source (22) are preferably bubble-free, at least partially filled with a potting material. [10] Tail lift system (200), comprising at least one tail lift (1), characterized byat least one loading platform light (100) according to at least one of the preceding claims, and a central control unit (220) which is connected to the control and / or regulating electronics (4) of the loading platform light (100) by means of a cable and / or radio communication, and wherein the central control unit (220) controls and / or regulates the loading platform light (100) depending on an inclination angle of the loading platform wall (1) relative to the horizontal according to an operating program which is stored and / or programmed in the central control unit (220). [11] Method (300) for operating an alarm system (1000), in particular a self-controlling, and further in particular a self-sufficient alarm system, one or more on-board lights (100), comprising - one or more charging board lights (100) which are wirelessly connected to each other in such a way that one charging board light (100) assumes the role of a master (M100) and the other charging board lights (100) assume the role of a slave (S100), wherein the The loading platform light (100) which first detects a passing vehicle or other object, regardless of direction, emits an alarm signal if one should be triggered, and forwards it to the other loading platform lights (100), and The on-board light (100) that detects a hazard first is the master (M100), the others that come after it, or that detect later, are the respective slaves (S100), characterized by , that The loading platform lights (100) organize themselves by mutual signal coordination so that at least the nearest loading platform light (100) emits a signal characteristic for the user, for example the loudest, to warn the unloader of the passing person and / or vice versa of the passing person of corners and edges of the lowered loading platform (1).

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