Racking Intersection Safety via Voltage Control
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Solution Overview
Problem
Existing racking systems face challenges in safely switching off rail vehicles due to the presence of metal within the racking, which can lead to delayed command transmission and safety risks during maintenance, repair, and servicing operations.
Innovation Solution
The racking system employs current bars along guiding tracks, but eliminates current bars from intersection areas, using voltage levels to control rail vehicle modes (normal, safety, and transfer) via a system control, ensuring safe and secure operation by switching off rail vehicles when access is required, even without current bars in intersection areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current bars are installed along all guiding tracks including intersection areas, then reliable command transmission is achieved, but safety risks increase during maintenance due to delayed command transmission in metal-rich environments
Solution Approach 1:
The guiding track system is segmented into two distinct types: current bar-free sections (including intersection areas) and current bar-equipped sections. This segmentation allows the system to eliminate harmful electromagnetic interference and safety risks in metal-rich intersection areas while maintaining reliable command transmission in non-metallic rack corridor sections through current bars.
Solution Approach 2:
Different sections of the guiding track system are assigned different functional qualities: intersection areas and transfer zones are designed as current bar-free zones to eliminate safety hazards, while rack corridor sections maintain current bars for reliable command transmission. This local differentiation optimizes both safety and communication reliability in their respective zones.
2Object-affected harmful factors
If current bars are removed from intersection areas, then safety risks during maintenance are reduced, but command transmission reliability may be compromised
Solution Approach 1:
The system introduces alternative communication intermediaries for different zones: current bars serve as communication intermediaries in rack corridor sections, while wireless communication or other non-contact methods serve as intermediaries in current bar-free intersection areas, maintaining command transmission reliability without the safety risks of current bars in metal-rich environments.
3Reliability
If voltage levels are used to control rail vehicle modes, then safe switching off is achieved, but system complexity increases
Solution Approach 1:
The system uses parameter changes (voltage levels) as a simple and effective control mechanism for rail vehicle safety. By changing the voltage parameter on current bars, the system can reliably switch rail vehicles between normal operation mode and safety mode without requiring complex control systems, achieving safe switching through straightforward electrical parameter modification.
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 solution allows for reliable and secure switching off of rail vehicles at any point, preventing unsafe movements during maintenance and ensuring safety by using voltage levels to manage rail vehicle operations, maintaining system control even in the absence of current bars in intersection areas.
Implementation Method 1
The guiding tracks each have at least one current bar. The vehicle control is connected to the current receivers, the intersection sensor, the drive unit and the current storage unit, and is configured to switch the rail vehicle at a first voltage detected at the current receiver into a normal operation mode, in which the rail vehicle operates according to the order
Implementation Method 2
The rail vehicles each have current receivers, which are configured to engage with the current bars in order to be supplied with current, if necessary
Data Source
AI summary
A racking for storing articles having guiding tracks and a rail vehicle, which may be moved on the guiding tracks for storing and retrieving the articles, wherein the guiding tracks merge in an intersection area. Within the guiding tracks there are formed current bars and at the rail vehicle there are formed current receivers engaging with the current bars and supplying the rail vehicle in the guiding tracks with energy. The intersection area is free of current bars. The rail vehicle has an intersection sensor, which is configured to detect whether the rail vehicle is within the intersection area. The vehicle control is configured to switch the rail vehicle, on the basis of the signals of the intersection sensor and the voltage in the guiding tracks, into different operation modes.