Rotating Bar Access Control System for Public Transport
Solution Overview
Problem
Existing access management systems for public transport vehicles are bulky, difficult to maneuver, and cause annoyance due to wide and fast movements of physical barriers, leading to energy inefficiency and obstruction issues, while also failing to effectively deter ticket evasion.
Innovation Solution
A compact access management system with bars that rotate on a vertical plane, reducing the protruding length and distance between them to minimize obstruction and movement range, ensuring sufficient passage width and visibility, while reducing energy consumption through a lightweight and efficient motor system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical barriers with vertical wing configuration are used, then obstruction effectiveness is improved, but weight and difficulty to maneuver increase
Solution Approach 1:
The barrier is divided into two separate bars that can rotate independently, allowing each bar to be lighter while maintaining collective obstruction effectiveness when positioned horizontally
Solution Approach 2:
The barrier transitions from a vertical wing configuration to a horizontal bar configuration, changing the dimension of obstruction from vertical to horizontal plane, which reduces weight while maintaining effectiveness
2Reliability
If horizontal bars with horizontal rotation are used, then obstruction effectiveness is improved, but the area spanned during movement increases causing user annoyance
Solution Approach 1:
The single horizontal bar is segmented into two shorter bars that rotate in opposite directions, reducing the total area swept during rotation while maintaining obstruction effectiveness
Solution Approach 2:
The two bars rotate in opposite directions (one clockwise, one counterclockwise), which reduces the overall movement area and creates a more compact rotation pattern that minimizes user annoyance
3Reliability
If the distance between bars is reduced, then obstruction effectiveness is improved, but visibility and passage width may be compromised
Solution Approach 1:
The bars are designed with different lengths (first bar longer than second bar), creating asymmetric local qualities that optimize both obstruction coverage and visibility while maintaining reduced distance between them
Data Source
Figure 1A
Figure 1B~1C
Figure 2A~2C
AI summary
Access management system (1) to a vehicle for the public transport of persons, the management system comprising: a pair of movement systems (3) which are mounted respectively on opposite sides of a passageway (5) of the vehicle and configured to rotate a respective bar (8) around a respective axis of rotation (10) between an open position, wherein a passage area (4) is allowed free by the management system (1) and an obstruction position, wherein a protruding portion (11) of the bar is in the passage area (4) with the main extension direction (9) arranged along the transverse direction (7), wherein in the open position said passage area (4) has a minimum width (W1) greater than or equal to 550mm and less than or equal to 630mm, wherein in the obstruction position a length (L1) of said protruding portion (11) of each bar is less than or equal to 270 mm and greater than or equal to 160 mm.