Capstan Control for Road Barrier Transfer on Inclined Surfaces
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Solution Overview
Problem
Existing moveable road barrier systems experience excessive compression or tension forces during transfer on inclined surfaces, leading to difficulty in repositioning and requiring inaccurate manual or static script-controlled capstan systems for correction.
Innovation Solution
A road barrier transfer machine with an automated capstan control system that uses sensors and a processing system to monitor and adjust tension or compression in real-time, eliminating the need for manual observation and static scripts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual control and visual observation are used for capstan systems, then the system is simpler to operate, but the accuracy of tension/compression control deteriorates
Solution Approach 1:
The patent replaces manual visual observation and mechanical capstan control with an automated optical sensing system (laser distance sensors) and computer-controlled capstan mechanism. The sensors continuously measure barrier position and the computer automatically adjusts capstan motor speeds to maintain proper tension, eliminating the need for manual intervention while improving control accuracy.
Solution Approach 2:
The system implements continuous feedback by using laser distance sensors to monitor the actual position of road barriers during transfer, comparing this data against desired positions, and automatically adjusting capstan motor speeds to correct any deviations. This closed-loop control ensures accurate tension/compression control throughout the transfer process.
2Extent of automation
If pre-programmed scripts are used for capstan control, then automation is improved, but the ability to account for actual compression/tension problems deteriorates
Solution Approach 1:
The system transitions from static pre-programmed scripts to dynamic real-time control. The computer continuously receives live position data from laser sensors and dynamically adjusts capstan motor speeds based on actual barrier positions and environmental conditions such as road grade, ensuring the system adapts to changing conditions during each transfer operation.
Solution Approach 2:
Real-time feedback from laser distance sensors enables the computer to monitor actual barrier positions and adjust capstan control dynamically. This feedback loop allows the system to respond to actual compression/tension problems as they occur during transfer, rather than relying on predetermined scripts that cannot account for real-world variations.
3Productivity
If barrier transfer is performed on inclined surfaces, then the barriers can be repositioned to different locations, but excessive compression or tension forces are generated
Solution Approach 1:
The laser distance sensors continuously monitor barrier positions during transfer on inclined surfaces, providing real-time data to the computer control system. This enables dynamic adjustment of capstan motor speeds to compensate for gravitational forces on grades, maintaining proper tension and preventing excessive compression at the downhill end or tension at the uphill end.
Solution Approach 2:
The system dynamically changes operational parameters (capstan motor speeds) based on detected road grade and barrier position. The computer adjusts the speed differential between head and tail capstans to counteract gravitational effects on inclined surfaces, maintaining optimal tension forces throughout the barrier span during transfer.
Data Source
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AI summary
A road barrier transfer machine includes an improved capstan control system that reduces unwanted migration of road barrier spans without requiring inaccurate visual observations and reliance on outdated scripts. The barrier transfer machine includes a moveable chassis, an entry snout, an exit snout, a conveyor system, a capstan system, and the capstan control system. The capstan control system automatically operates the capstan system or provides instructions to an operator of the machine to maintain the tension and compression of a road barrier span within desired ranges to reduce unwanted migration of the span.