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Sensor-controlled adjustment of odometry parameters according to weather conditions

A technology for measuring parameters and sensors, which is applied to railway car body components, signal indicators on vehicles, railway signals and safety, etc., and can solve problems such as distorting the overall result of mileage measurement, poor measurement accuracy, and wheel slippage

Active Publication Date: 2022-04-08
SIEMENS MOBILITY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 odometry parameters according to weather conditions
  • Sensor-controlled adjustment of odometry parameters according to weather conditions
  • Sensor-controlled adjustment of odometry parameters according 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

The invention relates to a method for adjusting a measurement variable of a mileage unit (30) of a rail vehicle (40). In the method, sensor data (SD, TD, FSD, LSD) of the interior and / or surroundings of a rail vehicle (40) are acquired by means of at least one sensor unit (10), which sensor unit comprises an interior image recording unit (10 ). Based on the collected sensor data (SD), weather data (WD) is determined based on the collected sensor data (SD). Finally, depending on the determined weather data (WD), the merging weights (FG) for merging odometry data (v, P(t)) based on odometry sensor data from different types of odometry sensors (15, 16) are determined (FD, DRD) determined.

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 Patents(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