Track Position Correction with Virtual Inertial Measurement
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Solution Overview
Problem
Existing track inspection methods, particularly the compensation method, suffer from drifting track main points due to aging, leading to deviations from the original design geometry, especially at points of restraint like bridges and tunnels, necessitating inefficient corrections.
Innovation Solution
A method involving a virtual inertial measurement simulation to determine correction values by subtracting simulated measuring data from actual inertial measurement data, using a computing unit to derive horizontal and vertical lifting values directly, eliminating the need for digital filtering and external reference points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the compensation method is used without known design geometry, then cost is reduced, but measurement precision deteriorates due to drifting track main points
Solution Approach 1:
The system performs preliminary inertial measurements to capture the actual track geometry before maintenance, then uses virtual simulation to pre-calculate the expected measurements for the target geometry. This preliminary action allows the correction values to be determined accurately without requiring external reference points or known design geometry, resolving the contradiction between cost reduction and measurement precision.
Solution Approach 2:
The invention creates a virtual copy of the inertial measurement system through simulation, which generates simulated measuring data for the target geometry. This virtual copying allows comparison between actual and simulated measurements to determine correction values, eliminating the need for expensive external reference systems while maintaining high measurement precision.
2Device complexity
If virtual inertial measurement simulation is used to determine correction values, then data processing is simplified and computing capacity requirements are reduced, but measurement precision may deteriorate
Solution Approach 1:
The invention replaces complex mechanical measurement and processing systems with a virtual simulation approach. Instead of using elaborate external reference systems and complex data processing algorithms, the system uses inertial measurement combined with virtual simulation to directly determine correction values. This substitution simplifies the overall system while maintaining accuracy through the direct comparison of actual and simulated inertial measurements.
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 approach simplifies data processing, accurately determines correction values, and maintains track position efficiently, ensuring high accuracy and reducing computing capacity requirements.
Implementation Method 1
an actual geometry of a track section being recorded by means of an inertial measurement device arranged on a track inspection vehicle while the track is being travelled on
Data Source
AI summary
The invention relates to a method for determining correction values for correcting a position of a track, with an actual geometry of a track section being recorded by means of an inertial measurement device arranged on a track inspection vehicle while the track is being travelled on, and with measuring data the recorded track section being output by the inertial measurement device to an evaluation device. In this case, a virtual inertial measurement of the same track section with a target geometry is calculated by means of a simulation device in order to obtain simulated measuring data for the target geometry, with correction values correcting the position of the track being determined by subtracting the simulated measuring data from the measuring data of the inertial measurement device by means of a computing unit. With the method according to the invention, correction values are determined directly on the basis of the measuring data of the inertial measurement device.