Derailment Detection Using Laser Distance Measurement
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Solution Overview
Problem
Existing systems face challenges in reliably detecting derailments, particularly in automated rail vehicles, where manual intervention is often required, and existing solutions are not effective for driverless operations.
Innovation Solution
A measuring arrangement with a distance measuring device set up in two spatial alignments, one to the right and one to the left of the vehicle's longitudinal direction, compares measured distance values with reference values to generate a derailment warning signal, utilizing a laser scanner or similar technology to detect deviations and indicate derailment or lateral twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual derailment detection by driver is used, then driver can apply emergency brakes, but automation is reduced and reliability is insufficient for driverless operations
Solution Approach 1:
The patent replaces manual mechanical detection by the driver with an automated measuring arrangement using a distance measuring device (laser scanner) and evaluation device. The system automatically measures distances to track elements and compares them with reference values to detect derailments, eliminating the need for manual intervention while maintaining high reliability through objective measurement and data processing.
2Reliability
If existing distance measuring devices are used, then derailment can be detected, but device complexity increases with multiple sensors and processing units
Solution Approach 1:
The patent employs a single distance measuring device that performs multiple functions: measuring distances to various track elements (rails, sleepers, ballast), creating measurement curves, and providing data for derailment detection. This multi-functional approach reduces the need for multiple specialized sensors while maintaining comprehensive detection capability.
Solution Approach 2:
The system creates reference value curves by copying and storing distance measurements from previous journeys or standard track conditions. During actual operation, current measurements are compared with these reference copies to detect deviations indicating derailment, eliminating the need for complex real-time analysis of absolute positions.
3Measurement precision
If single orientation distance measurement is used, then device complexity is reduced, but measurement precision is insufficient to detect all types of derailments
Solution Approach 1:
The patent divides the measurement task into multiple segments by measuring distances to different track elements (rails on left and right sides, sleepers, ballast) in different spatial orientations. Each measurement creates a separate curve that can be independently analyzed, allowing detection of various derailment types (lateral displacement, rotation, vertical displacement) without requiring a single complex measurement system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for reliable and simple detection of derailments with minimal component outlay, effectively preventing accidents by generating timely warning signals based on measured deviations from reference curves.
Implementation Method 1
a receiving device that receives object-side reflected or scattered received radiation of the measuring beam and generates the distance values on the basis of the received radiation, in particular on the basis of the time delay between the transmission of the radiation and the reception of the received radiation
Data Source
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AI summary
The invention relates to, inter alia, a measuring arrangement (4) for a rail-bound vehicle, particularly a rail vehicle (10). According to the invention, the measuring arrangement (40) comprises a distance-measuring device (41) which measures, in at least one pre-defined spatial measurement orientation at an angle to the right or left of the longitudinal direction of the vehicle, the respective distance between the distance-measuring device (41) and objects in the environment, viewed in the measurement orientation, and the measuring arrangement (40) comprises an evaluation device (44) which compares distance values (A(φ1), A(φ2) recorded during a current journey in the spatial measurement orientation with locally corresponding distance values, subsequently called reference values, recorded during at least one previous journey on the same stretch, and in the event that the deviation has a pre-defined deviation characteristic, generates a derailment warning signal (EWS).