Vehicle Slack Detection via Time Delay Separation
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Solution Overview
Problem
Existing methods for monitoring forces in vehicle coupling mechanisms are costly and complex, and do not effectively prevent excessive tensile or compressive forces that can lead to coupling failure or vehicle collision.
Innovation Solution
A method and system that determine slack conditions in a vehicle system by calculating the separation distance between vehicles based on time delays when they reach designated locations along a route, allowing for automatic control adjustments to maintain safe force levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force sensors are added to coupling mechanisms to monitor forces, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical force sensors with a communication-based system where vehicles exchange location and timing data to calculate separation distance. This substitutes direct mechanical measurement with information processing, eliminating the need for physical sensors in coupling mechanisms while achieving the monitoring objective.
Solution Approach 2:
The patent introduces communication devices and location determination systems as intermediaries between vehicles. Instead of directly measuring forces in couplers, the system uses location data and timing information as intermediaries to infer separation distance and detect slack conditions, avoiding direct mechanical measurement.
2Measurement precision
If force sensors are added to coupling mechanisms, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent replaces expensive mechanical force sensors with standard communication devices and location determination systems already present in modern vehicles. This substitution dramatically reduces component costs while maintaining monitoring capability through computational methods.
Solution Approach 2:
The system uses existing vehicle systems (communication devices, location determination, timing mechanisms) to perform the monitoring function. Each vehicle utilizes its own existing capabilities to contribute to the overall monitoring task, eliminating the need for dedicated force sensing infrastructure.
3Device complexity
If existing monitoring methods are used, then device complexity is reduced, but reliability decreases due to inability to prevent excessive forces
Solution Approach 1:
The patent implements a feedback mechanism where vehicles continuously exchange location and timing data, enabling real-time calculation of separation distance and detection of slack conditions. This continuous feedback loop allows for proactive control adjustments to prevent excessive forces, enhancing reliability while maintaining reasonable system complexity.
Solution Approach 2:
The system performs preliminary detection of potential slack conditions by monitoring separation distance trends before dangerous force levels are reached. By identifying issues early through continuous location and timing data exchange, the system can trigger preventive control actions before coupling mechanism failure or vehicle collision occurs.
Data Source
AI summary
A method for determining a slack condition of a vehicle system includes determining when each of first and second vehicles reaches a designated location along a route. The method also includes communicating a response message from the second vehicle to the first vehicle responsive to the second vehicle reaching the designated location, calculating a separation distance between the first vehicle and the second vehicle based on a time delay between a first time when the first vehicle reached the designated location and a second time when the second vehicle reached the designated location, and determining a slack condition of the vehicle system based on the separation distance. The slack condition is representative of an amount of slack in the vehicle system between the first and second vehicles.