Rail Vehicle Wheel Sensor Mechanical Decoupling
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Solution Overview
Problem
Existing wheel sensors for rail vehicles face challenges in withstanding various weather conditions and mechanical vibrations, and their power connections are not stable enough to resist external influences.
Innovation Solution
The sensor arrangement includes a wheel sensor fixed to a metal carrier with a plastic housing and a separately connected power connector, which is mechanically decoupled from the wheel sensor to enhance stability, allowing for independent mounting and maintenance, and uses inductive sensors for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wheel sensor is permanently fixed to the rail, then the sensor can continuously detect rail vehicle movement, but the sensor is exposed to mechanical vibrations and weather conditions that reduce its reliability
Solution Approach 1:
The sensor system is divided into separate components: the wheel sensor is mounted on a carrier that is independently attached to the rail, while the power cable connection is separated through a flexible connector. This segmentation isolates the sensitive sensor from direct exposure to mechanical vibrations and environmental stressors.
Solution Approach 2:
A flexible connector serves as an intermediary between the power cable and the wheel sensor, decoupling the sensor from direct mechanical stress transmitted through the power cable. This intermediary protects the sensor while still providing necessary electrical power.
2Reliability
If the power cable is directly connected to the wheel sensor, then power supply is simple, but the connection is unstable and susceptible to external influences
Solution Approach 1:
The power connection system is segmented into distinct components: a rigid power cable, a flexible connector with strain relief, and the sensor mounting carrier. This segmentation allows each component to be optimized for its specific function while improving overall connection stability.
Solution Approach 2:
The flexible connector incorporates strain relief features that cushion and absorb mechanical stresses before they reach the electrical connection. This beforehand cushioning protects the connection from vibrations and external forces that would otherwise destabilize it.
3Strength
If the wheel sensor is directly mounted without a separate carrier, then the structure is simpler, but the sensor cannot effectively withstand mechanical vibrations and external forces
Solution Approach 1:
The mounting system is segmented into a dedicated carrier component that interfaces with both the rail and the wheel sensor. This carrier acts as a separate structural element that provides mechanical strength and vibration damping, isolating the sensor from direct exposure to harsh mechanical conditions.
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 configuration improves the mechanical stability of the sensor arrangement, protecting it from forces exerted by power cables and environmental factors, while enabling reliable detection of rail vehicle movement and facilitating maintenance.
Implementation Method 1
The wheel sensor can comprise an inductive sensor
Data Source
AI summary
A sensor arrangement (20) comprises a wheel sensor (21) which is arranged to detect wheels of rail vehicles, a carrier (22), and a connector (23), wherein the wheel sensor (21) is fixed on the carrier (22), the connector (23) is fixed to the carrier (22), and the connector (23) is electrically connected with at least one electrical contact (24) of the wheel sensor (21).