Method and apparatus for generating a digital image of a route of a rail vehicle

Abstract

The invention relates to a method and an apparatus for generating a digital image of a route of a rail vehicle (1), wherein at least one landside object (8) is detected by means of at least one passenger entry sensor (4, 5) of the rail vehicle (1) and at least one distance of the detected landside object (8) from the rail vehicle (1) is determined by means of an evaluation device, and a digital image of the route of the rail vehicle (1) is generated by means of the evaluation device or a landside evaluation unit on the basis of the at least one determined distance from the rail vehicle (1).

Description

[0001]202405760 Description Method and device for generating a digital image of a track of a rail vehicle The invention relates to a method and a device for generating a digital image of a track of a rail vehicle, wherein at least one land-side object is detected by means of at least one passenger boarding sensor of the rail vehicle. For comfortable boarding and alighting from a rail vehicle for passenger transport, a step-free and gap-free, as level as possible, horizontal transition between the passenger platform and the boarding area of ​​the rail vehicle is desirable. Various so-called folding or sliding steps or similar solutions have become known for bridging the gap between the platform and the vehicle, some of which are also variably adjustable in height. Height-adjustable step platforms are known, for example, from DE 19909 700 A1 and DE 20104 221 U1.For optimal adjustment of these adjustable step platforms, the height and distance of the platform to the vehicle entrance can be determined using sensors. The published patent application WO 98 / 58148 A1 teaches a rail vehicle with corresponding sensors. Raising or lowering the floor height of the rail vehicle has also become known. For example, the documents DE 10315 000 A1, WO 2008 / 081019 A1 and EP 3 608 195 A1 teach corresponding level adjustments, with door sensors detecting a possible offset between the platform and the floor. However, the infrastructure facilities of a railway line are subject to change over time, for example due to wear and tear, other-related damage or vegetation. For example, platforms can settle due to mining damage and their position and / or dimensions change over time. The vegetation in the area of ​​the line is also subject to change over time.Tree branches can grow into the clearance profile of rail vehicles traveling on the track. The track must therefore be constantly monitored for changes, repaired, and maintained, for example, by cutting back nearby vegetation or repairing damage to infrastructure facilities. Special surveying vehicles can be used for this purpose. These survey tracks, platforms, or other infrastructure facilities at defined waypoints at predetermined distances from one another, for example using lasers. Furthermore, sensor systems for monitoring the track of rail vehicles have become known. The recorded data can be used to detect obstacles and thus avoid collisions. WO 2006 / 008292 A1 describes a method for monitoring the track of a rail vehicle.If a specified standard clearance profile is violated, a check is carried out to determine whether the obstacle is known. WO 2004 / 028881 A1 discloses a suitable sensor system for this purpose. Camera, laser, radar, and lidar systems are currently used in particular to record the surroundings of a rail vehicle. With these systems, it is also fundamentally possible to create a digital image, particularly a three-dimensional one, of the track and thus of the route including its surroundings – a so-called digital twin of the track. Digital twins are digital representations and thus virtual replicas of machines or systems that include all relevant data and simulation models. In addition to the models of the represented object, they also contain simulations that describe the properties or behavior of the represented object.202405760 WO 2022 / 043213 A1 describes a method for checking a clearance for a rail vehicle by means of a simulated journey of a digital twin of the rail vehicle on a digital twin of a rail vehicle route. The regular creation of a digital twin of the route enables the monitoring of the aforementioned temporal changes to the route, including the initiation of countermeasures. The invention is based on the object of simplifying the monitoring of a rail vehicle route. This object is achieved by the subject matter of the independent patent claims. Further developments and refinements of the invention can be found in the features of the dependent patent claims.A method according to the invention for generating a digital image of a route of a rail vehicle, in particular a rail vehicle for passenger transport, with at least one passenger entry sensor at least for monitoring an entry area in front of an external door of the rail vehicle, comprises the following method steps: a. Detecting at least one landside object means of the at least one passenger entry sensor; b. Determining at least one distance of the detected landside object from the rail vehicle; c. Generating a digital image of the route of the rail vehicle based on the at least one distance from the rail vehicle.A device according to the invention is set up to carry out the method according to the invention; for this purpose, it comprises the means suitable for carrying out the respective method step, in particular: - at least one passenger entry sensor for detecting at least one measured value relating to a distance to a land-side object; - at least one evaluation device for determining at least one distance to the land-side object; - at least one, in particular land-side, evaluation unit for generating a digital image of a route of a rail vehicle based on the at least one determined distance to the rail vehicle and / or the at least one vehicle-side evaluation device is additionally set up to generate a digital image of a route of a rail vehicle based on the at least one determined distance to the rail vehicle.The at least one passenger boarding sensor is suitably designed and arranged, in particular in or on a rail vehicle, for detecting at least one measured value relating to a distance of a land-based object from the rail vehicle. The at least one evaluation device can be part of the at least one passenger boarding sensor or separate from this part of the rail vehicle. It is configured to determine at least one distance of the detected land-based object from the rail vehicle. Furthermore, the vehicle-side evaluation device and / or an evaluation unit, in particular a land-based one, can be configured to generate the digital image of the rail vehicle's route based on the at least one determined distance of the at least one detected object from the rail vehicle.A rail vehicle according to the invention, in particular a rail vehicle for passenger transport, comprises at least the 202405760 at least one passenger entry sensor and the at least one evaluation device. The at least one passenger entry sensor is in particular a common passenger entry sensor known from the prior art, in particular a contactless sensor. It is usually designed as an optical sensor, for example as a camera-based sensor, and / or as an ultrasonic, laser, radar and / or lidar sensor. It can therefore be part of an ultrasonic, laser, radar and / or lidar system and / or an optical sensor system, for example a camera system. The at least one passenger entry sensor is in particular arranged in a region of an outer door of the rail vehicle. It is less commonly also called a door sensor. The outer door can also be referred to as an entry or exit door.The at least one passenger boarding sensor is configured at least to monitor the boarding area and is suitably arranged in or on the rail vehicle. The boarding area, which can also serve as an alighting area and be referred to as such, comprises at least the area surrounding the rail vehicle, particularly immediately in front of the outer door of the rail vehicle. This includes, in particular, a gap between the rail vehicle and a platform for the rail vehicle, as well as at least a part of the platform of the rail vehicle that is close to the rail vehicle or track. Furthermore, at least part of the floor in an interior of the rail vehicle behind the outer door, briefly referred to as the entrance or passenger entrance of the rail vehicle, can be included.The at least one passenger boarding sensor is therefore suitably designed at least for detecting the platform, in particular 202405760 at least one platform edge, and is arranged in or on the rail vehicle. Advantageously, the at least one passenger boarding sensor is set up as a suitable measuring device for detecting at least one measured value for a horizontal and / or vertical distance of a landside object, for example the platform, from the rail vehicle, in particular for a predetermined reference point of the rail vehicle, for example a point on the front edge of the entrance of the rail vehicle. A horizontal and / or vertical distance of the object from the rail vehicle can be detected directly by means of the at least one passenger boarding sensor and / or at least one measured value, in particular for a distance determined by a length orA measured variable deviating from a distance, such as a travel time, is recorded by at least one passenger boarding sensor, from which a horizontal and / or vertical distance of the object to the rail vehicle can be determined. For example, the distance of the object to the rail vehicle can be determined from one or more photos of the object taken by one or more camera systems. A land-side object is understood to be an object, particularly one close to the track, which is located in the area of ​​the rail vehicle's route, for example trackside infrastructure facilities, structures or vegetation. The land-side object is particularly stationary.Analogous to the recording of at least one measured value for a distance between the platform and the rail vehicle, for example the distance between the platform edge and a front edge of the entrance of the rail vehicle in the area of ​​the outer door, other objects close to the vehicle in a sensor field of the at least one passenger entry sensor or horizontal and / or vertical distances of the objects located in the sensor field to the 202405760 rail vehicle can thus also be recorded by means of the at least one passenger entry sensor. The expression of the at least one measured value should also be considered to include a plurality of measured values ​​for horizontal and / or vertical distances of an object, in particular a point cloud. Using these plurality of recorded and / or determined distances, in particular the point cloud, an object can be detected using corresponding evaluation algorithms.The determination of the at least one distance of the rail vehicle from the at least one object in the vehicle's surroundings can be carried out by the at least one passenger entry sensor itself, or the at least one passenger entry sensor detects the at least one measured value for a horizontal and / or vertical distance of the object from the rail vehicle and makes it available for evaluation, in particular to an evaluation device which is designed to determine the at least one distance of the detected land-side object from the rail vehicle on the basis of the at least one measured value for a horizontal and / or vertical distance of the object from the rail vehicle detected and provided by the at least one passenger entry sensor.In particular, the at least one distance of the detected object from the rail vehicle is determined based on the at least one measured value provided by the at least one passenger entry sensor by a vehicle-side door control as a correspondingly configured evaluation device. The evaluation device, in particular the door control, and / or the at least one passenger entry sensor are configured to determine and provide a plurality of, in particular horizontal and / or vertical, distances of the at least one landside object of the track, detected by the at least one passenger entry sensor 202405760, from the rail vehicle. From the determined distance of the detected object from the rail vehicle, a distance of the detected object from the track of the rail vehicle, in particular from a predetermined reference point of the track, for example a rail of the track, can be determined.This is easily possible if the position of the reference point of the rail vehicle, to which the distance of the object is determined, is known in relation to the position of the reference point of the track. This is particularly the case if the position of the rail vehicle is known at least along the route, in particular in the track along the route. From the known position of the rail vehicle, in particular of the reference point of the rail vehicle, and from the at least one determined distance of the at least one detected object from the rail vehicle, in particular to the reference point of the rail vehicle, the location of the at least one detected object can be determined in a further development. According to a further development of the invention, method step a. comprises, or takes place at the same time as method step a.A position is understood to be the location of a given point on the earth's surface or in a given space. Here, the location of at least one point of the rail vehicle, in particular of the at least one reference point of the rail vehicle, for example of the at least one passenger boarding sensor, on the earth's surface or in particular on the track of the route is to be detected or determined. 202405760 The position of the rail vehicle can be determined using positioning systems, for example GNSS, such as GPS, GLONASS, Galileo, or Baidu. Furthermore, beacons in the track are suitable for determining the position of the rail vehicle on the track.The position of the rail vehicle can also be determined by determining the path length from predetermined, known starting points, or by detecting objects such as prominent buildings and then determining the path, in particular by comparing them with a digital map on which the detected objects are shown. Based on the at least one determined distance between the detected land-based object and the rail vehicle, a digital image of the rail vehicle's route is generated. The digital image of an object comprises, in particular, several determined distance values, in particular a point cloud. It is therefore not a pure digital photograph. The position of the object in relation to the rail vehicle as well as the size and shape of a side of the object facing the rail vehicle can advantageously be derived from the digital image. The digital image can therefore also be used for object recognition.The method steps are preferably carried out repeatedly, in particular also while the rail vehicle is traveling on a track of the route, in particular on at least a section of the route, advantageously along the entire route. In addition, the at least one passenger boarding sensor can be set up to detect a plurality of landside objects simultaneously. In this way, distances to a plurality of trackside objects can be determined from just one measurement. 202405760 In a further development, method step a. therefore comprises the detection of a plurality of landside objects by means of the at least one passenger boarding sensor and method step b. then comprises the determination of at least one distance of the detected landside objects to the rail vehicle or to a reference point of the rail vehicle or to a reference point of the track of the rail vehicle and method step c.comprises the generation of a digital image of the route of the rail vehicle based on the determined distances of the detected objects to the rail vehicle. According to a further development, at least method step a. is repeatedly carried out at predetermined time intervals or at predetermined distances from one another along the route. In particular, this takes place continuously while the rail vehicle is traveling on the route. As already explained above, method steps b. and c. can also be repeatedly carried out accordingly. The execution of method step b. follows in particular immediately after the execution of method step a. The repetition of method step b., however, does not necessarily have to be repeated at the same predetermined spatial or time intervals, since deviations can occur due to latencies. Furthermore, method step b.In a further development, this can be followed by transmission of at least the at least one distance to a land-based evaluation unit, wherein method step c. can be carried out by the land-based evaluation unit. In this respect, the transmission and generation of the digital image can also be carried out repeatedly, in particular cyclically, but possibly differently from the detection of the objects, for example due to the availability of a transmission network, such as a mobile radio network, which can be used for the transmission. When transmitting the at least one 202405760 distance, other data can also be transmitted, for example image data, in particular of the at least one passenger entry sensor, from which the distances are determined and which can then be used for land-based object detection. Furthermore, the position information linked to the at least one distance can be transmitted.In addition to the position information, for example via a so-called location stamp, time information, for example via a so-called time stamp, can also be linked to the determined distances in order to be able to detect changes over time, for example after several passes, and to derive measures from this if necessary. Based on several determined distances, for example point clouds, several recorded land-based objects from the rail vehicle and together with their position along the rail vehicle's route, a digital map of the rail vehicle's route can be generated. A digital image of the rail vehicle's route is understood in particular to mean a digital map. With further technical characteristics of the objects on the route, for example their physical properties and behavior, a fully-fledged digital twin of the rail vehicle's route could also be created.A digital map can be described as a simple digital twin, in which only the position of the objects on the rail vehicle's route is recorded. While the rail vehicle is traveling on a track on the route and / or when the rail vehicle is stopped, for example at a stop, in particular a platform, the distance values ​​to the objects in the rail vehicle's vicinity and the respective corresponding position of the rail vehicle are determined - the determined distance values ​​are, for example, provided with a so-called location and time stamp - and in particular transmitted to a 202405760 land-based database and stored there. From the data entered in the database, i.e. from the distance and position data of the, in particular several, detected objects on the route, the digital image - the digital map - of the route can then be generated by means of a further, land-based evaluation unit.The landside evaluation unit can be suitably configured for object recognition, in particular from the determined distance values ​​to the detected objects. The invention thus simplifies the creation of a digital map of the track using a passenger entry sensor for monitoring a space in front of an external door of the rail vehicle. As already explained, the regular creation of a digital map or a digital twin of the track enables the monitoring of the aforementioned temporal changes to the track and thus the detection and implementation of necessary maintenance or repair measures, for example, repairs to trackside infrastructure facilities or their structural modifications, trimming of vegetation, and the like. This is possible simply and cost-effectively with the at least one existing passenger entry sensor.Separate surveying work, for example with specially trained vehicles, can be reduced or even avoided. Instead, vehicles in regular operation can be used for this purpose, meaning the procedure can be carried out regularly. The frequency of measurements could increase the availability of the route. Vegetation could be specifically treated with pesticides or mechanical maintenance. The route could be monitored for foreign objects near the track. Platform settlement or deformation could be logged. Construction site areas could be recorded and thus precisely stored in the route plan. 202405760 At least one measured value relating to the distance between a land-side object and the rail vehicle, recorded by a passenger boarding sensor on a rail vehicle to monitor a passenger boarding of the rail vehicle, is used to generate a digital image of the route of the rail vehicle.Analogously, the device according to the invention, in particular comprising at least the at least one passenger boarding sensor of the rail vehicle, is used to generate the digital image of the track of the rail vehicle. The at least one measured value recorded by the at least one passenger boarding sensor serves to determine the at least one horizontal and / or vertical distance of the detected land-based object from the rail vehicle. The measured value is recorded at the stated distance and represents this. The measured variable "distance", i.e. the shortest connection between at least one reference point of the rail vehicle and at least one reference point of the detected land-based object, does not have to be the direct object of the measurement. The distance can be determined using physically known or defined mathematical relationships from quantities to which the measurement directly applies.The measured value can, for example, also be a transit time, a transit time difference, a frequency shift or one or more photographs from which the distance is determined. According to a further development of the invention, at least method step a. is followed by: - ​​recognition of the at least one detected object using a suitable evaluation algorithm. The object is recognized by means of the suitable evaluation algorithm, in particular based on the measured values ​​202405760 recorded by the at least one passenger entry sensor and / or based on the distance values ​​determined in method step b., in particular based on the point cloud to the at least one detected object. In particular, multiple detected objects can be recognized in this way.The object can be detected by the vehicle-side evaluation device, on which the suitable evaluation algorithm runs, or the object can be detected by the land-side evaluation unit, on which the suitable evaluation algorithm is implemented, wherein method step c. then reads: determining at least one distance of the detected land-side object from the rail vehicle, in particular from a reference point of the rail vehicle or from a reference point of the track of the rail vehicle. As already explained, the at least one passenger boarding sensor is configured in particular to detect a gap between the entrance of the rail vehicle and the platform, which is arranged in front of the outer door of the rail vehicle when the rail vehicle is stopped at a stop or in a station.In a further development, the at least one passenger entry sensor can be suitably designed and suitably arranged in or on the rail vehicle for detecting persons on a track who have fallen in an entry area between a rail vehicle and a platform. According to a further development, the device according to the invention can be designed from the at least one passenger entry sensor and the at least one vehicle-side evaluation device for detecting persons on a track who have fallen in an entry area between a rail vehicle and a platform. The vehicle-side evaluation device can thus be set up for object recognition in order to distinguish relevant from irrelevant objects. In this way, mobile 202405760 objects can be distinguished from stationary objects or small and / or light objects can be distinguished from large and / or heavy objects.For example, insects, small birds, or leaves can be identified as harmless, while larger tree branches that extend into the track can be identified as potentially dangerous. In particular, changes to trackside infrastructure facilities and structures must be identified. Additionally or alternatively, the land-based evaluation unit can be suitably designed for this purpose. This is made possible, in particular, by a corresponding algorithm that is implemented and executed on the evaluation device of the rail vehicle and / or on the land-based evaluation unit. A corresponding computer program product comprises instructions that, when the program is executed by a suitable vehicle-based evaluation device and / or a land-based evaluation unit, cause it to carry out method step c. and / or subsequent method steps.A provision device for the computer program product stores and / or provides the computer program product. In particular, the provision device is a data carrier on which the computer program product is stored. According to a further development of the invention, the device comprising the at least one passenger boarding sensor and the at least one evaluation device, in particular a door control, is designed to control or regulate an extension and / or retraction movement of an adjustable step platform of the rail vehicle. Accordingly, method step b. can be followed in a further development when the rail vehicle stops at a platform: controlling a movable step platform of the rail vehicle in the area of ​​the outer door depending on the determined distances. 202405760 The invention permits numerous embodiments.It is explained in more detail with reference to the following figures, each of which shows an exemplary embodiment. Identical elements in the figures are provided with the same reference numerals. Fig. 1 shows a schematic flow diagram of an exemplary embodiment of the method according to the invention, Fig. 2 shows a schematic flow diagram of an exemplary embodiment of a rail vehicle according to the invention. Fig. 1 shows a sequence or flow diagram of an exemplary embodiment of the method according to the invention. In a first method step a., at least one passenger boarding sensor of a rail vehicle for passenger transport records at least one measured value for a distance between at least one trackside object and a reference point of the rail vehicle. Several measured values ​​for distances can be recorded for several trackside objects, for example, so-called point clouds can be recorded for each object. This makes it possible to shape orto determine the shape and / or size of the respectively detected objects and thus also to recognize the objects using a suitable algorithm for object recognition. In the subsequent method step b., at least one distance of the at least one object to the rail vehicle is determined from the at least one detected measured value. Likewise, at least one distance, in particular several distances to the rail vehicle, can be determined for several detected objects. This is done in particular by means of an on-board evaluation device. The object is also recognized by the on-board evaluation device. 202405760 In addition, at the same time as method step a.a position of the rail vehicle is recorded absolutely or relatively in the route of the rail vehicle, for example by means of a position determination unit by receiving a position signal such as a GNSS signal, and the respectively recorded position is linked with the respectively recorded measured values ​​for the distances. The time at which the respective measured values ​​for the distances are recorded can also be recorded and linked with these. These method steps can be repeated, in particular continuously while the rail vehicle is traveling on a track of the route, i.e. carried out at predetermined temporal or spatial intervals along the route of the rail vehicle. From these determined distances and, if applicable, using the respectively associated recorded positions of the rail vehicle, a digital image of the route of the rail vehicle is then generated in method step c.can be carried out by the vehicle-side evaluation device, which is then set up accordingly, or process step c. is carried out by a stationary, land-based evaluation unit. Accordingly, the determined distances of the detected objects between process steps b. and c. would be transmitted from the rail vehicle to the land-based evaluation unit. Additionally or alternatively, the land-based evaluation unit is set up for object recognition. Using the digital image of the route generated for the detected and / or recognized objects on the track and repeatedly updated, e.g. by several suitably equipped vehicles, the objects on the route and their changes over time can be monitored. In addition to a pure environmental survey or environmental mapping, a digital twin of the route can also be created using the process.This is particularly easy to achieve through the use of passenger entry sensors and their measurement data. Fig. 2 illustrates a car body 1 of a rail vehicle for passenger transport, each with a passenger entry sensor 4, 5 (also called door sensors) arranged in the area of ​​two exterior or entrance doors 2, 3 of the rail vehicle, for detecting the respective surroundings of the exterior doors 2, 3. The rail vehicle 1 is depicted on a track of a route of the rail vehicle 1 during a stop at a platform 8. The passenger entry sensors 4, 5 are arranged differently. One passenger entry sensor 4 is arranged above the door 2, the other passenger entry sensor 5 is arranged below the door 4. Their sensor fields 6, 7 differ accordingly. The reference numerals 6 and 7 identify the respective sensor fields of the passenger entry sensors 3 and 4.However, the passenger boarding sensors 4, 5 are equally configured to record measured values ​​for at least one distance from landside objects to the respective passenger entrance. This makes it possible, for example, to detect whether the outer door 2, 3 is located on a platform 8, so that the door 2, 3 opens of its own accord, or to detect people who have fallen in the area of ​​the entrance between the train and platform 8. Such passenger boarding sensors 4, 5 have a very high measurement resolution, which makes it possible to continuously and dynamically measure the nearby infrastructure. They can therefore measure not only the platform 8, but also the track and / or the surroundings of the rail vehicle 1 and generate valuable track data that is always very up-to-date, since rail vehicles continuously measure and can thus continuously record the dynamic environment.In addition, the passenger entry sensors 4, 5, if necessary together with an evaluation device not shown, are to be controlled or regulated a step platform 9 of the rail vehicle for bridging a gap between the entry area of ​​the rail vehicle 1 and the platform 8.

Claims

202405760 Patent claims 1. Method for generating a digital image of a route of a rail vehicle (1) with at least one passenger boarding sensor (4, 5) at least for monitoring an entry area in front of an external door (2, 3) of the rail vehicle (1), comprising the following method steps: a. detecting at least one landside object (8) by means of the at least one passenger boarding sensor; b. determining at least one distance of the detected landside object (8) from the rail vehicle (1); c. generating a digital image of the route of the rail vehicle (1) based on the at least one distance from the rail vehicle (1).

2. Method according to claim 1, characterized in that method step a. comprises: detecting several landside objects (8) by means of the at least one passenger boarding sensor (4, 5), wherein method step b.comprises: determining at least one distance of the detected land-side objects (8) from the rail vehicle (1), and wherein method step c. comprises: generating a digital image of the route of the rail vehicle (1) based on the determined distances of the detected objects (8) from the rail vehicle (1).

3. Method according to one of claims 1 or 2, characterized in that in method step a. a plurality of distances to the at least one detected land-side object (8) from the rail vehicle (1) are determined.

4. Method according to one of claims 1 to 3, characterized in that at least method step a. 202405760 is carried out repeatedly at predetermined time intervals or at predetermined distances from one another.

5. Method according to one of claims 1 to 4, characterized in that method step b. follows and method step c. precedes: - transmitting at least the at least one distance to a land-based evaluation unit, wherein method step b. is carried out by the land-based evaluation unit.

6. Method according to one of claims 1 to 5, characterized in that method step a. follows: - detecting the at least one detected object (8) by means of a suitable evaluation algorithm.

7. Method according to one of claims 1 to 6, characterized in that method step a. comprises or takes place simultaneously with method step a.: determining a position of the rail vehicle (1).

8. Method according to claim 7, characterized in that method step c. comprises or takes place simultaneously with method step c.takes place: generating the digital image of the route of the rail vehicle (1) based on the determined position of the rail vehicle (1).

9. Method according to one of claims 1 to 8, characterized in that method step b. is followed by: controlling a movable step platform of the rail vehicle (1) in the region of the outer door (2, 3) depending on the determined distances.

10. Use of at least one by means of a passenger entry sensor (4, 5) for monitoring a. 202405760 passenger entrance (2, 3) measured value relating to a distance of a land-based object (8) to a rail vehicle (1) to generate a digital image of the route of the rail vehicle (1). 11.Device for carrying out the method according to one of claims 1 to 9, comprising: -at least one passenger entrance sensor (4, 5) for acquiring at least one measured value relating to a distance to a land-based object (8); -at least one evaluation device for determining at least one distance to the land-based object (8); -at least one evaluation unit for generating a digital image of a route of a rail vehicle (1) based on the at least one determined distance, and / or the at least one evaluation device configured to generate a digital image of a route of a rail vehicle (1) based on the at least one determined distance. 12.Device according to claim 11, characterized in that it is designed to detect persons on a track who have fallen in the area of ​​an entrance (2, 3) between a rail vehicle (1) and a platform (8).

13. Device according to one of claims 11 or 12, characterized in that it comprises a plurality of passenger entry sensors (4, 5) for respectively detecting at least one measured value relating to a distance to a land-side object (8). 202405760 14.Use of the at least one device according to one of claims 11 to 13 for generating a digital image of a route of a rail vehicle (1).

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