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Sensor-controlled adjustment of odometric measurement parameters to weather conditions

A sensor and sensor unit technology, applied in railway car body parts, signal indicators on vehicles, railway signals and safety, etc., can solve the problems of poor measurement accuracy, distorted overall mileage measurement results, and wheel slippage, and achieve improvement. The effect of accuracy

Active Publication Date: 2020-04-17
SIEMENS MOBILITY GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Snow, fog and rain can negatively affect the performance of Doppler radar sensors
Rain can cause a slippery roadway or track surface, which can also cause the wheels to slide and skid, thereby degrading the measurement accuracy of the sensors that measure the rotational frequency of the wheels
There is therefore the problem that errors occur in the measurement of the odometry data by the individual sensors and thus distort the overall result of the odometry measurement

Method used

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  • Sensor-controlled adjustment of odometric measurement parameters to weather conditions
  • Sensor-controlled adjustment of odometric measurement parameters to weather conditions
  • Sensor-controlled adjustment of odometric measurement parameters to weather conditions

Examples

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Embodiment Construction

[0041] figure 1 A method for adjusting the measured variables of a mileage unit of a rail vehicle is shown in . In step 1.I, sensor data, in this example image data BD, are collected from the surroundings of the rail vehicle, image data are collected by surveillance cameras, temperature data TD are collected by temperature sensors measuring the external temperature, humidity sensor data The FSD is collected by the humidity sensor, and the optical radar sensor data LSD is collected by the optical radar sensor. In step 1.II, weather data WD are determined based on the collected sensor data BD, TD, FSD, LSD. For example, humidity sensor data can be used to determine whether it is currently raining and how much it is raining. Finally, in step 1.III, a combining weight FG for combining the mileage data, for example the measured speed or the distance covered, is determined on the basis of the determined weather data WD. The mileage data itself is determined after adjustment, for ...

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Abstract

A method for adjusting measurement parameters of an odometry unit (30) of a rail vehicle (40) is described. According to said method, sensor data (SD, TD, FSD, LSD) from the interior and / or the surroundings of the rail vehicle (40) are acquired with the aid of at least one sensor unit (10) that comprises an internal image-recording unit (10). On the basis of the acquired sensor data (SD), weatherdata (WD) are determined on the basis of the acquired sensor data (SD). Lastly, fusion weightings (FG) for the fusion of odometric data (v, P(t)) that have been determined on the basis of odometric sensor data (FD, DRD) from different types of odometric sensors (15, 16) are defined depending on the determined weather data (WD).

Description

technical field [0001] The invention relates to a method for adjusting a measurement variable of a mileage unit of a rail vehicle. Furthermore, the invention relates to an adjustment device. Furthermore, the invention relates to a rail vehicle. Background technique [0002] Speed ​​measurement is essential for the autonomous driving and assistance systems of vehicles. Velocity data can be used for many different purposes. To this end, for example, compliance with legal regulations, planning of trips, braking operations and the introduction of position determination are monitored. Typically, velocity is determined by combining measurements from different sensors. Sensors used for speed determination may produce erroneous data. This situation may for example be due to bad weather conditions such as rain, snow or the like. Snow, fog and rain can negatively affect the performance of Doppler radar sensors. Rain can cause a slippery roadway or track surface, which can also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61L25/02B61L15/00B61L23/04
CPCB61L15/0072B61L23/041B61L25/025B61L25/026B61L25/021
Inventor S.A.卡尔德H.科塔布达尔N.努拉尼-瓦塔尼A.帕尔默
Owner SIEMENS MOBILITY GMBH
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