Overhead Conductor Rail Testing With Closed-Loop Force and Buffering
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Solution Overview
Problem
Existing methods for testing the rigid-flexible characteristics of rigid-flexible transition overhead conductor rails in tunnels and urban rail transit systems lack flexibility in force loading, precision in displacement measurement, and fail to consider elastic buffering, leading to inaccurate data and increased workload.
Innovation Solution
A test device and method utilizing a movable vehicle with a telescopic mechanism, force sensor, displacement detection mechanism, and elastic assembly to simulate the interaction between a pantograph and the conductor rail, enabling closed-loop control of lifting force and displacement, and buffering to mimic actual service conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual testing method is used to apply fixed contact pressure and measure displacement, then the test setup is simple, but the test efficiency is low and test precision is not guaranteed
Solution Approach 1:
The patent replaces manual mechanical operations with an automated control system that uses sensors (force sensor, displacement sensor) and a control unit to automatically apply contact pressure, measure displacement, and collect test data. This substitution of manual mechanical testing with an automated sensor-based system resolves the contradiction by maintaining simple test setup while dramatically improving test efficiency and precision.
2Stability of the object's composition
If mechanical devices with balance weight are used to apply fixed tension load, then the force loading is stable, but the operation process has many defects and test workload increases
Solution Approach 1:
The patent implements a self-service testing system where the control unit automatically controls the loading device to apply contact pressure based on force sensor feedback, and automatically records displacement data from the displacement sensor. The system performs self-measurement and self-recording without requiring manual intervention for force application or data collection, thereby maintaining force stability while eliminating operational defects and reducing test workload.
3Device complexity
If existing test method is used, then the test process is straightforward, but displacement measurement precision cannot be effectively guaranteed
Solution Approach 1:
The patent employs feedback mechanisms where displacement sensors and force sensors continuously provide real-time data to the control unit, which processes and records the measurements. This feedback-based automated measurement system maintains test method simplicity while significantly improving displacement measurement precision through continuous monitoring and digital data processing.
4Device complexity
If static fixed contact pressure testing is used, then the test setup is simple, but elastic buffering characteristics are not fully considered
Solution Approach 1:
The patent transitions from static fixed contact pressure testing to a dynamic testing approach where the loading device applies contact pressure that can vary during the test, simulating the actual dynamic interaction between pantograph and conductor rail. The force sensor and control unit enable dynamic adjustment of contact pressure to reflect elastic buffering characteristics, maintaining test setup simplicity while significantly improving the reliability of service characteristic reflection.
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
Accurately evaluates the rigid-flexible characteristics by simulating real-world conditions, improving precision and reducing test errors, while ensuring stable and efficient data collection.
Implementation Method 1
an elastic assembly for buffering the lifting force is arranged between the telescopic mechanism and the displacement sensor
Data Source
AI summary
A test device for rigid-flexible characteristics of a rigid-flexible transition overhead conductor rail, includes a movable vehicle moved in a length extending direction of the overhead conductor rail. A telescopic mechanism for providing lifting force for the overhead conductor rail is mounted on the movable vehicle and stretches out and draws back in a vertical direction, and a conversion plate is connected to a top end of the telescopic mechanism and synchronously moved in the vertical direction therewith. A sliding assembly is mounted at a top of the conversion plate and slides along the overhead conductor rail with the movable vehicle. The overhead conductor rail is located over the sliding assembly which abuts against a bottom wall of the overhead conductor rail. A force sensor is arranged between the telescopic mechanism and the conversion plate. A displacement detection mechanism is arranged on the conversion plate.