Cable Winch Tension Feedback Control for Powerline Deployment
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Solution Overview
Problem
Conventional cable winches are unable to actively control the tension on high voltage power cables during deployment, making operations dangerous and inefficient, particularly when using helicopters, which are costly and require skilled labor.
Innovation Solution
A cable winch with a sensor system and control system that detects tension and adjusts the speed and torque of the drive system to maintain a predetermined tension on the cable, using a spool, drive system, sensing sheave system, and programmable logic controller to ensure accurate cable deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional winches are used to deploy cables, then the deployment operation can be performed, but the tension on the cable cannot be actively controlled
Solution Approach 1:
The patent implements a feedback control system where sensors detect cable tension and provide signals to a controller, which then adjusts the drive system to maintain predetermined tension levels during cable deployment and retrieval operations
Solution Approach 2:
The patent replaces purely mechanical conventional winch systems with an automated control system that uses electronic sensors, controllers, and variable frequency drives to manage cable tension, reducing reliance on manual mechanical adjustment
2Productivity
If helicopters are used to lift and install power line cables, then the cables can be deployed, but the operation becomes dangerous and costly
Solution Approach 1:
The patent replaces helicopter-based cable deployment with a ground-based automated winch system that uses controlled tensioning to pull cables through the air, eliminating the need for helicopters and associated safety risks while maintaining deployment efficiency
Solution Approach 2:
The patent divides the cable deployment process into controlled segments: the cable is first secured to the winch spool, then paid out under controlled tension, and finally retrieved with predetermined tension levels, allowing precise control throughout the operation
3Reliability
If cable tension is not actively controlled during deployment, then the winch system is simpler, but the operation becomes less safe and more inefficient
Solution Approach 1:
The patent employs feedback control through tension sensors that continuously monitor cable tension and provide real-time signals to the controller, which adjusts the drive system to maintain safe and efficient predetermined tension levels throughout deployment operations
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
Enables precise control of cable tension, enhancing safety and efficiency by reducing the need for skilled labor and minimizing the risk of accidents, while optimizing the deployment process.
Implementation Method 1
a sensor system having a first sensor able to detect and output tension data in relation to the tension in the cable passing through the sensor system
Implementation Method 2
a drive system connected to the spool and able to drive rotation of the spool to either pay out or wind in the cable along the cable path
Data Source
AI summary
A cable winch (100) for deploying and retracting a cable (50) during the installation of powerline cables on transmission towers. The cable winch (100) includes a base frame (102), a spool (110), a drive system (120), a sensor system (200), and a control system (300). The spool (110) is mounted for rotation on the base frame (102) and the cable (50) is releasably securable to the spool (110). The drive system (120) is able to drive rotation of the spool (110) to either pay out or wind in the cable (50) along a cable path. The cable path passes through the sensor system (200), which has a first sensor (244) able to detect and output tension data in relation to the tension in the cable (50) passing through the sensor system (200). The control system (300) is adapted to receive the tension data output by the sensor system (200) and modulate the speed and torque of the drive system (120) in order to maintain a predetermined tension in the cable (50).