Railway Door State Monitoring Using Sensor-Position Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for determining abnormalities in door opening or closing operations of railway vehicles fail to accurately differentiate between stuck or locked sensing means and deteriorated sensors, and cannot identify the source of inappropriate states indicated by the sensing outputs.
Innovation Solution
A monitoring apparatus and method that includes a sensing circuitry to detect the locked or released state of a door and a processor to acquire output signals and position information, determining abnormalities based on a match between the output and position information to identify issues in door opening or closing configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only the output of the sensing means is checked to determine door state abnormalities, then the determination process is simple, but it is impossible to accurately identify whether the sensing means itself is abnormal or whether the door state is truly abnormal
Solution Approach 1:
The patent introduces position information as an intermediary parameter to mediate between the sensing means output and the actual door state. By comparing the sensing output with independent position information from the door driving device, the system can identify inconsistencies that indicate sensing means abnormalities without adding significant complexity to the determination process.
Solution Approach 2:
The system implements feedback by continuously monitoring the consistency between sensing means output and door driving device position information. When inconsistencies are detected, the system can identify the sensing means as potentially abnormal and trigger appropriate responses, creating a closed-loop verification mechanism that improves identification accuracy.
2Measurement precision
If multiple parameters are monitored to accurately identify sensing means abnormalities, then abnormality identification accuracy improves, but the device complexity increases
Solution Approach 1:
The door driving device serves multiple functions: it drives the door operation and simultaneously provides position information for sensing means verification. This multi-functionality allows the system to use existing components for dual purposes, improving abnormality identification accuracy without proportionally increasing device complexity.
Solution Approach 2:
The patent merges the monitoring function with the existing door control system by integrating position information acquisition from the door driving device into the sensing means verification process. This consolidation allows multiple monitoring tasks to be performed through a unified system architecture, reducing overall complexity while maintaining high identification accuracy.
3Productivity
If the sensing means output is trusted without verification, then the system operation is simple and fast, but the reliability of door state determination deteriorates
Solution Approach 1:
The system performs preliminary verification by continuously comparing sensing means output with position information from the door driving device before making final door state determinations. This preliminary check ensures reliability is maintained while minimizing impact on operation speed, as the verification occurs in parallel with normal door operations.
Data Source
AI summary
A monitoring apparatus includes a sensing circuitry configured to sense a locked or released state of a door of a railway vehicle, or sense an open or closed state of the door, and a processor. The processor acquires an output of the sensing circuitry, and position information in an opening or closing direction of the door, and determines an abnormality in a configuration related to an opening or closing operation of the door, based on a match between the acquired output of the sensing circuitry and the position information.