Rope Robot Mounting of Line Sensors on Energized Power Lines
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Solution Overview
Problem
The mounting of line sensors to power lines is challenging, particularly in difficult-to-access areas, as it requires live-line work processes, which are risky, time-consuming, and expensive. Existing sensor housings enclose the power line wire, preventing cooling and visual inspection, and creating hotspots.
Innovation Solution
A rope robot is designed to climb along vertically suspended and tensioned ropes between the ground and a power line, equipped with a crawler unit, support unit, and manipulator unit, allowing it to mount line sensors to the power line without the need for live-line work.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor housings enclose the power line wire, then the sensor is protected and mounted securely, but the power line cooling is prevented and hotspots are created
Solution Approach 1:
The sensor housing is designed with a nested structure where the sensor unit is housed within a protective housing that contains an through-opening. The power line passes through this opening, allowing the sensor to be mounted securely on the power line while the opening maintains thermal exchange between the sensor interior and exterior environments, preventing hotspot formation.
Solution Approach 2:
The housing structure provides localized protection only where needed (around the sensor components) while maintaining openness along the power line contact area. The through-opening creates a localized thermal pathway that allows cooling airflow specifically at the power line interface without compromising overall sensor housing protection.
2Reliability
If sensor housings enclose the power line wire, then the sensor is protected, but visual inspection of the wire is prevented
Solution Approach 1:
The sensor unit is nested within a protective housing that contains a through-opening. This opening allows the power line to pass through while maintaining visibility of the power line surface condition, enabling visual inspection without removing the protective housing.
Solution Approach 2:
The housing is segmented to include a through-opening that separates the protective enclosure function from the visual access function. This segmentation allows the housing to provide protection while simultaneously enabling visual inspection of the power line through the opening.
3Productivity
If live-line work processes are used to mount sensors, then sensors can be mounted on powered power lines, but personnel are exposed to high voltage risks and the process becomes time-consuming and expensive
Solution Approach 1:
The sensor unit incorporates an integrated attachment mechanism with attachment arms that can directly engage with the power line surface. This self-service attachment capability allows the sensor to mount itself or be easily mounted without requiring complex live-line work tools or procedures, reducing personnel exposure to high voltage risks.
Solution Approach 2:
The attachment mechanism uses simple mechanical attachment arms that can be operated from ground level or with minimal exposure, replacing the need for complex mechanical live-line work systems such as hot sticks or insulated tools that require personnel to work at height near energized lines.
Data Source
AI summary
A method is for mounting an object, such as a line sensor, to a power line. The method includes: i) suspending and tensioning at least two ropes between a physical ground and a power line; ii) coupling a rope robot with the at least two ropes in such a way that the rope robot can climb up and down the at least two ropes in operational use; iii) providing an object on the rope robot; iv) making the rope robot climb up to the power line to bring the object close to the power line; v) mounting the object to the power line with the rope robot, and vi) decoupling the rope robot from the object and making the rope robot climb down the at least two ropes. A rope robot is disclosed for carrying out this method.