Rail Vehicle Dynamic Brake Force Detection via Deceleration Data
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Solution Overview
Problem
Existing rail vehicle braking systems face challenges in efficiently and cost-effectively determining the braking force exerted by dynamic braking devices, which interact critically with conventional service brakes, requiring complex and expensive sensors.
Innovation Solution
A control device that calculates the braking force of dynamic braking devices using deceleration, running resistance, and braking data from other vehicle systems, allowing for the potential elimination of specialized sensors and enabling plausibility checks, calibration, and determination based on vehicle parameters and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated sensors are used to detect braking force exerted by dynamic braking devices, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent introduces a control device as an intermediary that calculates braking force indirectly using deceleration data from acceleration sensors, driving resistance data, and braking data from other braking devices, instead of directly measuring it with complex brake force sensors. This mediator approach resolves the contradiction by achieving sufficient measurement precision through calculation rather than direct measurement.
Solution Approach 2:
The patent replaces mechanical brake force sensors with a computational system that uses readily available data (deceleration, driving resistance, and other braking forces) to calculate the braking force exerted by dynamic braking devices. This substitution eliminates the need for complex mechanical sensing while maintaining measurement capability.
2Measurement precision
If brake force sensors are installed on dynamic braking devices, then braking force measurement accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The control device performs the function of braking force measurement using data already available from the system's normal operation (acceleration sensors, driving resistance data, and braking data from other devices). The system essentially measures its own state using existing components, eliminating the need for additional specialized sensors and reducing manufacturing costs.
Solution Approach 2:
The control device serves multiple functions: it monitors deceleration, processes driving resistance data, tracks braking forces from other devices, and calculates the braking force of dynamic braking devices. This multi-functionality eliminates the need for dedicated brake force sensors, reducing manufacturing costs while maintaining measurement accuracy.
3Measurement precision
If complex sensor systems are used to measure dynamic braking force, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The control device acts as an intermediary that automatically processes multiple data sources (deceleration, driving resistance, other braking forces) to calculate dynamic braking force. This automated calculation simplifies operation by eliminating the need for operators to manually monitor or interpret complex sensor readings from multiple specialized sensors.
Data Source
Figure 1
AI summary
The invention relates to a control device (28) for a rail vehicle (10), said rail vehicle (10) comprising a braking system with at least one dynamic braking device (17) and at least one further braking device (23, 24, 26). The control device (28) is designed to determine the brake force exerted by the dynamic braking device (17) during braking based on deceleration data, which represent an overall deceleration of the rail vehicle, tractive resistance data, which represent a tractive resistance of the rail vehicle, and braking data, which represent a brake force exerted by the at least one further braking device. The invention further relates to a braking system comprising said control device (28), a rail vehicle (10) and a corresponding method.