Railway Mechanical Brake Deceleration Sensing for Deterioration Control
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Solution Overview
Problem
Existing technologies fail to isolate and control the mechanical brake devices have not addressed the mechanical brake devices have not effectively addressed the variation in mechanical brake systems, leading to deviations in actual deceleration from the target deceleration. Existing systems cannot accurately acquire the actual deceleration caused by mechanical braking force alone, which is crucial for evaluating the level of deterioration and controlling the mechanical brake devices to maintain target deceleration.
Innovation Solution
An actual deceleration acquiring device and a deterioration evaluating device are introduced, which include a speed acquirer and a determiner to measure the speed and determine the actual deceleration of a railway vehicle solely under mechanical braking force, allowing for the evaluation of mechanical brake device deterioration and subsequent brake control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the monitoring device calculates deceleration from ATC data including both mechanical and electric braking forces, then the deceleration can be calculated, but the actual deceleration caused by mechanical braking force alone cannot be acquired
Solution Approach 1:
The patent segments the braking process into two distinct phases: electric braking phase and mechanical braking phase. By separating the measurement of deceleration into these distinct phases, the system can isolate the mechanical braking force effect from the electric braking force effect, thereby acquiring the actual deceleration caused by mechanical braking alone.
Solution Approach 2:
The patent extracts the mechanical braking force information from the combined braking system by measuring deceleration only during the mechanical braking phase when electric braking is not applied. This extraction method isolates the mechanical braking component from the total braking force, solving the information loss problem.
2Speed
If mechanical brake devices are used for deceleration, then the railway vehicle can be decelerated, but the mechanical braking force varies due to component deterioration leading to deviation from target deceleration
Solution Approach 1:
The patent implements a feedback mechanism where the actual deceleration caused by mechanical braking is continuously measured and compared with the target deceleration. Based on this comparison, the brake control apparatus adjusts the mechanical braking force to compensate for deterioration, thereby maintaining consistent deceleration performance despite component aging.
Solution Approach 2:
The patent changes the control parameter from fixed braking force to variable braking force based on actual deceleration measurement. By continuously adjusting the mechanical braking force according to the measured actual deceleration and target deceleration difference, the system compensates for parameter changes due to component deterioration.
3Productivity
If both electric braking force and mechanical braking force are applied simultaneously, then the railway vehicle can be decelerated efficiently, but the actual deceleration caused by mechanical braking force alone cannot be readily acquired
Solution Approach 1:
The patent applies preliminary action by completing the electric braking phase before initiating the mechanical braking phase. This sequential arrangement allows the system to first utilize electric braking for efficient deceleration, then switch to mechanical braking alone for accurate measurement of mechanical braking deceleration, thereby achieving both efficiency and measurement precision.
Data Source
AI summary
An actual deceleration acquiring device includes a speed acquirer and a determiner. The speed acquirer acquires a speed of a railway vehicle for a subject period while the railway vehicle is being decelerated by not an electric braking force but a mechanical braking force alone among the mechanical braking force and the electric braking force. The railway vehicle is configured to be decelerated by at least either of the electric braking force and the mechanical braking force. The determiner determines, based on a variation in the speed acquired by the speed acquirer, an actual deceleration of the railway vehicle in the subject period.