Rail Vehicle Collision Test Rig Velocity Control
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Solution Overview
Problem
Conventional rail vehicle collision tests have low accuracy in velocity control due to the manual operation of real locomotives, which results in lag and insufficient sensitivity, leading to imprecise test data.
Innovation Solution
A rail vehicle collision test rig and method utilizing a small vehicle pushed by a drive motor and braked by a brake motor, controlled by a detector and controller, to accurately manage the velocity of the tested vehicle, with a connecting rope system for synchronized movement and a controlled separating device for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a real locomotive is used to drive the tested vehicle, then the test can be performed with real vehicle conditions, but the velocity control accuracy is low due to manual operation lag
Solution Approach 1:
The patent creates a simplified copy of the locomotive function using a small vehicle equipped with drive and brake motors. This small vehicle replicates the essential pushing function without the complexity and manual operation requirements of a real locomotive, thereby achieving precise velocity control while maintaining the fundamental test conditions
Solution Approach 2:
The patent replaces the manual mechanical operation of a real locomotive with an automated motor-driven system. The drive motor and brake motor on the small vehicle provide automated mechanical force application, eliminating human reaction time delays and enabling precise, programmable velocity control
2Ease of operation
If a real locomotive is manually operated, then the system can respond to velocity information, but the response sensitivity is low and accurate switch control cannot be achieved
Solution Approach 1:
The small vehicle system is self-controlled through automated motor control. The drive motor and brake motor respond automatically to control signals without requiring manual operation, enabling the system to self-regulate velocity and respond instantaneously to control commands
Solution Approach 2:
The patent implements a feedback control system where velocity detectors continuously monitor the tested vehicle's speed and provide real-time data to the control system. This closed-loop feedback enables rapid response and precise adjustment of the drive and brake motors to maintain accurate velocity control
3Measurement precision
If a small vehicle with motor drive is used instead of a real locomotive, then the velocity control accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent segments the locomotive function into separate, modular components: a small vehicle body, drive motor, brake motor, connecting rope system, and detection/control systems. This segmentation allows each component to be optimized independently and simplifies the overall system compared to using a full-scale locomotive
Solution Approach 2:
The patent introduces a connecting rope as an intermediary mechanism between the small vehicle and the tested vehicle. This simple mechanical intermediary transfers the driving force from the small vehicle to the tested vehicle without requiring complex direct coupling mechanisms
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
Significantly improves the accuracy of velocity control during rail vehicle collision tests, reducing manual operation errors and enhancing test data precision while minimizing space requirements.
Implementation Method 1
a drive motor configured to drive the small vehicle to move forward
Implementation Method 2
a brake motor configured to brake the small vehicle
Implementation Method 3
a connecting rope, wherein the connecting rope is wound on the first rotating hub and the second rotating hub, and the small vehicle is connected to the connecting rope
Data Source
AI summary
A rail vehicle collision test rig used for a collision test on a tested vehicle is provided, and includes: a track configured to support and guide the tested vehicle; a small vehicle configured to push the tested vehicle; a drive motor configured to drive the small vehicle to advance and arranged at a first end of the track; a first rotating hub arranged at the first end of the track and connected to the drive motor; a brake motor configured to brake the small vehicle; a second rotating hub arranged at the second end of the track and connected to the brake motor; a connecting rope wound on the first rotating hub and the second rotating hub; a detector configured to detect a velocity and a position of the tested vehicle; and a controller connected to the detector and is allowed to be in communication with the detector.