Pipe Inspection Robot Wide Tracks and Curved Capstan
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Solution Overview
Problem
Conventional pipe inspection robots face challenges such as getting stuck due to debris, jamming of track systems, and issues with tether management, especially in confined and dirty pipe environments, which hinder their ability to effectively navigate and inspect pipes.
Innovation Solution
The design incorporates full coverage/wide tracks with high static friction for better adhesion and self-cleaning properties, a self-cleaning pulley system, and a compact winch assembly with a curved capstan to prevent tangling, allowing the robot to navigate over debris and maintain traction, while a braided tether system reduces drag and facilitates easier movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional wheels or narrow tracks are used for robot navigation, then the robot structure is compact and simple, but the robot cannot navigate past debris or obstacles in the pipe
Solution Approach 1:
The patent transitions from narrow tracks to wide tracks that extend across the full width of the robot chassis. This dimensional change allows the tracks to contact debris directly and provide sufficient leverage to push over obstacles, fundamentally improving navigation capability while maintaining a relatively simple track system architecture.
Solution Approach 2:
The patent changes the width parameter of the tracks from narrow to wide, and increases the friction coefficient through high-friction materials or surface treatments. These parameter changes enable the tracks to generate enough force to overcome debris obstacles without requiring complex additional mechanisms.
2Ease of operation
If pulley-track system with teeth and valleys is used for robot movement, then the robot can maintain traction, but particulate debris causes jamming of the track system
Solution Approach 1:
The patent removes the tooth-valley engagement mechanism from the pulley-track system, retaining only smooth pulleys and tracks. This extraction eliminates the valleys where particulate debris accumulates, preventing jamming while the high-friction surfaces maintain adequate traction for robot movement.
Solution Approach 2:
The patent converts the harmful effect of high friction (which causes jamming with debris) into a beneficial effect by using high-friction materials on smooth surfaces. The smooth surfaces prevent debris accumulation while the high friction coefficient ensures adequate traction, transforming the potential harm into a benefit.
3Device complexity
If flat-bottomed capstan is used for tether management, then the winch structure is simple, but the tether walks to one side and becomes tangled
Solution Approach 1:
The patent replaces the flat-bottomed capstan with a V-shaped or grooved capstan that has a curved profile. This curvature guides the tether to run along the center of the capstan, preventing it from walking to one side and becoming tangled, while adding minimal structural complexity to the winch system.
4Ease of operation
If manhole cover is left open for robot access, then the robot can enter and inspect the pipe, but fog forms due to temperature difference preventing proper observation
Solution Approach 1:
The patent implements preliminary action by closing the manhole cover before the robot begins its inspection mission. This allows fog to dissipate and temperature to equalize, improving visual observation conditions. The robot is lowered through the closed cover using a tether, maintaining both safe access and good observation conditions.
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 robot can efficiently traverse pipes with minimal obstruction, maintain traction on greasy surfaces, and operate with reduced drag, enabling effective inspection and navigation without the need for pre-cleaning or external assistance, while also allowing for autonomous operation and easy retrieval.
Implementation Method 1
full coverage/wide tracks with high static friction for better adhesion
Implementation Method 2
curved capstan to prevent tangling
Data Source
AI summary
A device is described that includes a sensor portion and a chassis portion. The sensor portion includes a plurality of sensing devices. The chassis portion is connected to the sensor portion and includes a first track and a second track. The second track is positioned adjacent the first track. The first and second tracks cooperate to substantially cover an entire width of the chassis portion.