Level-Crossing Relay Diagnostics With Cover-Mounted Current Sensors
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Solution Overview
Problem
Existing diagnostic systems for level crossing safeguarding systems require high development effort and are costly, necessitating a simplification to reduce these burdens while maintaining effectiveness.
Innovation Solution
A diagnostic system that incorporates multiple current sensors arranged adjacent to each other within a covering, eliminating the need for a specific relay interface, and utilizing a communication bus to collect and transmit measurement data via a Modbus protocol to an IoT box for cloud-based analysis, with sensors designed to fit within existing cable ducts without compromising their load-bearing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a specific relay interface is used to capture information from relay circuit adaptation points, then diagnostic information can be captured, but development effort and costs increase significantly
Solution Approach 1:
The invention extracts the diagnostic function from the complex relay interface and implements it directly at the adaptation points using simple current sensors. The sensors are integrated into the existing cable duct structure, eliminating the need for a separate relay interface while maintaining diagnostic information capture capability.
Solution Approach 2:
The invention replaces the mechanical/electrical relay interface system with a sensor-based measurement system. Current sensors directly measure adaptation point currents, substituting the complex relay-based information capture mechanism with a simpler electromagnetic sensing approach.
2Measurement precision
If multiple current sensors are installed in the cable duct to capture switching situation information, then diagnostic data can be obtained, but installation space and potential interference with cable duct load-bearing capacity arise
Solution Approach 1:
The current sensors are nested within the existing cable duct structure. The sensors are mounted inside the cable duct's longitudinal access side, utilizing the existing spatial envelope without requiring additional external space. This nesting approach allows multiple sensors to be arranged along the duct length while maintaining the duct's external dimensions.
Solution Approach 2:
The sensors are arranged in the longitudinal direction of the cable duct, utilizing the length dimension rather than expanding the width or depth. This dimensional arrangement allows multiple sensors to be installed without compromising the cable duct's cross-sectional load-bearing capacity.
3Ease of operation
If the covering width is increased to accommodate multiple current sensors, then all sensors can be housed together, but access to other parts of the level crossing safeguarding system becomes difficult
Solution Approach 1:
The sensors are arranged in the longitudinal direction of the covering rather than side-by-side in the width direction. This longitudinal arrangement allows multiple sensors to be accommodated within the existing covering width, maintaining access to other system parts while housing all necessary sensors.
4Ease of operation
If the covering depth is increased to accommodate sensors, then sensors can be installed, but the cable duct's load-bearing capacity is compromised
Solution Approach 1:
The current sensors are nested within the existing cable duct depth, utilizing the available internal space without requiring additional depth. The sensors are mounted on the inner surface of the covering, allowing them to be accommodated within the original depth envelope while preserving the cable duct's load-bearing capacity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the diagnostic system, reduces development and installation costs, and allows for accurate chronological data capture, facilitating easy retrofitting without impacting the primary level crossing safeguarding system, while minimizing space usage and ensuring reliable data transmission.
Implementation Method 1
a plurality of current sensors (161-164) are arranged, in particular fastened, adjacent to one another in the longitudinal direction of the covering in said covering
Data Source
AI summary
A diagnostic system for a level-crossing safeguarding system. The safeguarding system has a relay circuit with electrical connection cables that are at least partly guided in a cable conduit. The cable conduit has a longitudinal access side with a detachable cover. The diagnostic system is simplified in that the cover is configured for receiving a plurality of current sensors of the diagnostic system and the plurality of current sensors are disposed, in particular fastened, next to one another in the cover in the longitudinal direction of the cover. There is also described a current sensor for such a diagnostic system and to a method for installing such a diagnostic system.