Dynamic Braking Capability Transmission for Rail Vehicle Safety
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Solution Overview
Problem
Current methods for determining braking capability on rail sections are inadequate, leading to safety concerns and inefficiencies, as static information does not reflect real-time conditions, resulting in reduced line capacity and increased costs due to infrequent measurements and conservative velocity adjustments.
Innovation Solution
A method and apparatus that collect and process position-dependent information on braking capability using onboard sensors and communication systems, allowing for real-time assessment and transmission of braking information between rail vehicles and wayside devices, enabling dynamic adjustments to maintain safe operations and optimize line utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static information about braking capability is used for rail vehicle operation, then safety is maintained through conservative velocity adjustments and increased vehicle spacing, but line capacity is reduced and operational costs increase
Solution Approach 1:
The patent transforms static braking capability information into dynamic real-time data through continuous measurement journeys. The system continuously updates braking capability parameters (a1, a2, s1, s2) based on current line conditions, allowing velocity profiles and vehicle spacing to be dynamically optimized rather than relying on conservative static assumptions
Solution Approach 2:
The system implements feedback through continuous measurement journeys that collect actual braking performance data from the line. This feedback loop enables the control center to update braking capability information and transmit optimized velocity profiles to vehicles, replacing conservative static information with accurate real-time data
2Measurement precision
If measurement journeys are conducted frequently to obtain accurate braking capability information, then reliability of braking data improves, but operational costs increase
Solution Approach 1:
The patent makes leading vehicles serve a dual function: their primary function of transporting passengers is combined with the secondary function of performing measurement journeys to collect braking capability data. This eliminates the need for dedicated measurement vehicles, reducing operational costs while maintaining continuous accurate measurements
Solution Approach 2:
The system uses the rail vehicles themselves to perform measurements as they normally operate on the line. The leading vehicles automatically conduct measurement journeys during their regular service, collecting braking data without requiring separate dedicated measurement operations or additional resources
3Reliability
If conservative velocity adjustments are applied to account for reduced braking capability, then safety is ensured, but journey times increase and line capacity decreases
Solution Approach 1:
The system dynamically changes velocity profile parameters based on actual measured braking capability. Instead of applying fixed conservative velocity reductions, the control center calculates optimized velocity profiles using current braking parameters (a1, a2, s1, s2), allowing vehicles to maintain higher speeds when conditions permit while ensuring safety through accurate real-time data
Data Source
AI summary
A method and a control device determine a position-related braking ability of a vehicle. A first vehicle determines at least one piece of position-related information of a route section, the at least one piece of position-related information of the route section being information relating to the braking ability on the route section. The first vehicle transmits the at least one piece of position-related information to a receiver, the receiver being at least one second vehicle, whereby the braking curves of at least one rail vehicle are adapted according to the situation, thus allowing safety on the route section and the utilization of the section to be improved.