Rotating Dual Display Member for Train Cabin Redundancy
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Solution Overview
Problem
In heavy transport vehicles like rail vehicles, there is often limited space in the driver's cabin for a display unit, and if the existing display system fails, it can disrupt the operation of the Automatic Train Protection system, leading to safety issues since there is no reserved space for redundancy.
Innovation Solution
A device with two separate display units that can be swapped without requiring additional panel space, allowing continued operation by switching to a functioning unit when one fails, with mechanical and electrical connections for easy attachment and detachment, ensuring redundancy without increasing the size of the display units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single display unit is installed in the driver's cabin, then the panel space requirement is minimized, but the system reliability deteriorates because there is no redundancy available when the display fails
Solution Approach 1:
Two display units are merged into a single integrated display member assembly that occupies the space of one display unit. The display member contains both display units positioned one behind the other, allowing them to share the same mounting space and panel opening, thus providing redundancy without requiring additional panel area.
Solution Approach 2:
One display unit is nested within the display member structure alongside the other display unit. The display member acts as a container that houses both display units in a compact arrangement, enabling one unit to be positioned behind the other within the same spatial envelope, effectively providing redundancy without increasing the footprint on the panel.
2Reliability
If two separate display units are installed to provide redundancy, then the system reliability improves, but the panel space requirement increases
Solution Approach 1:
Two display units are merged into a single integrated display member assembly that occupies the space of one display unit. The display member contains both display units positioned one behind the other, allowing them to share the same mounting space and panel opening, thus providing redundancy without requiring additional panel area.
3Reliability
If a display unit fails, then the ATP system operation is disrupted, but installing a backup display unit increases the panel space requirement
Solution Approach 1:
Two display units are merged into a single integrated display member assembly that occupies the space of one display unit. The display member contains both display units positioned one behind the other, allowing them to share the same mounting space and panel opening, thus providing redundancy without requiring additional panel area.
Solution Approach 2:
The display member is designed to be rotatable, allowing dynamic switching between the two display units. When one display unit fails, the entire display member can be rotated 180 degrees to bring the other display unit into the driver's view, enabling continued operation without requiring physical replacement during critical moments.
4Ease of repair
If the display member is designed for easy removal and replacement, then the ease of repair improves, but the device complexity increases
Solution Approach 1:
The display system is segmented into separable components: the display member containing both display units is separable from the frame, and each display unit within the member is also separable. This segmentation allows the display member to be easily removed from the frame for repair or replacement, and individual display units to be replaced within the member, facilitating maintenance while using straightforward mechanical attachment mechanisms.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A device for displaying information of importance for driving a vehicle to a driver inside a driver's cabin of the vehicle has two separate display units (6, 7) with a screen (9) each joined to form a display member (5). A frame (3) is to be attached to a carrier inside the driver's cabin and provided with mechanical members (11) for interacting with mechanical members (13) of the display member for removable attachment of the display member to and within the frame (3) with the screen of an optional of the display units (6, 7) facing the space of the driver's cabin. The display member has electrical connecting members to be brought in electrical connection with electrical connecting members of the frame.