Continuous Assist Zipline Braking via Shuttle Brake Line
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Solution Overview
Problem
Zipline systems face challenges in controlling and braking riders effectively, particularly on steep courses, where riders may arrive at high speeds, leading to potential collisions or incomplete stops, necessitating efficient speed control and braking mechanisms to ensure safe landing and reduce rescue operations.
Innovation Solution
A continuous assist braking and control system using an endless loop or shuttle brake line, tensioned between upper and lower reels, allows zipline operators to control the movement, speed, and acceleration of riders by adjusting the braking force applied to the reels, ensuring safe and controlled deceleration at the landing platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zipline operators rely on gravity-based cable rides without active braking mechanisms, then the system structure remains simple, but riders arrive at high speeds causing potential collisions and incomplete stops
Solution Approach 1:
A brake line acts as an intermediary element between the rider and the braking mechanism. The brake line is attached to the rider's pulley block and passes through guides at the landing platform, allowing remote application of braking force without direct mechanical connection to the rider
Solution Approach 2:
The braking system is segmented into independent components: the brake line, upper and lower reels, braking devices, and guide structures. This segmentation allows the braking function to be added without redesigning the entire zipline system, maintaining structural simplicity while improving safety
2Reliability
If zipline operators install braking mechanisms to control rider speed, then rider safety improves, but the system complexity and operational difficulty increase
Solution Approach 1:
The brake line is automatically paid out from the upper reel and taken up by the lower reel during rider descent without requiring operator intervention. The system self-regulates the brake line tension and positioning, reducing operational complexity while maintaining speed control capability
Solution Approach 2:
The braking system incorporates feedback through the brake line tension and the rider's position on the cable. As the rider approaches the landing platform, the brake line tension increases naturally, providing automatic speed reduction without requiring continuous operator adjustment
3Speed
If zipline operators use steep cable slopes to maintain excitement, then rider thrill increases, but rider speed becomes too high requiring effective braking
Solution Approach 1:
The braking system is pre-positioned and pre-tensioned before the rider arrives. The brake line is already in place and the braking devices are ready to engage, providing immediate counter-action to the rider's momentum as they approach the landing platform, preventing collisions before they can occur
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
The system enables precise control over rider speed and braking, reducing the risk of collisions and incomplete stops, thereby enhancing safety and efficiency by allowing operators to manage the braking process remotely, minimizing rescue operations and ensuring riders reach the landing platform safely.
Implementation Method 1
A continuous assist braking and control system using an endless loop or shuttle brake line, tensioned between upper and lower reels, allows zipline operators to control the movement, speed, and acceleration of riders by adjusting the braking force applied to the reels
Implementation Method 2
pulley block 30 may roll smoothly along cable 12
Implementation Method 3
Rider 32 begins by donning harness 33 supplied by the zipline operator... Rider 32 is released under the control of the zipline operator's personnel. More particularly, pulley block 30 rolls along cable 12 toward landing platform 20
Data Source
AI summary
A continuous assist braking and control system (10) operable to control the movement, speed and acceleration of a zipline rider (32) traversing a zipline (12). A brake line (40) is entrained around first and second reels (50, 52), and suspended above the zipline (12). The rider (32) is tethered to the brake line (40). A brake (56) is coupled to at least one of the reels (50, 52). When the brake (56) is disengaged, the brake line (40) is pulled along with the rider (32) as the rider (32) traverses the zipline (12). When the brake (56) is engaged, the reels' rate of rotation is slowed, thereby slowing the brake line (40) and the rider (32). When the brake (56) is engaged to stop the reels' rotation, the brake line (40) is brought to a stop, thereby arresting the motion of rider (32).