Sewer Inspection Camera Centering With Autonomous Offset Correction
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Solution Overview
Problem
Conventional sewer inspection systems face challenges in accurately and efficiently positioning cameras or other inspection units in the center of sewer pipes, which is complex, prone to human error, and can lead to equipment damage, inconsistent inspection results, and difficulty in comparing sequential inspections.
Innovation Solution
A system and method using a sensor system to detect distances from a predetermined point in the pipe, a processing unit to determine the pipe diameter and center point, and a positioning unit to correct horizontal and vertical offsets, enabling precise alignment of inspection units without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual positioning of the camera is used, then the camera can be positioned in the center of the pipe, but the process is complex, time-consuming, and prone to human error
Solution Approach 1:
The system uses autonomous self-positioning through sensor systems that automatically detect pipe geometry and calculate the center point, eliminating the need for manual operator intervention. The inspection unit independently determines its position and makes corrections without human input.
Solution Approach 2:
Manual mechanical positioning operations are replaced by an automated system combining sensor systems for detection, processing units for calculation, and positioning units with actuators for automatic adjustment. This substitutes human-operated mechanical systems with automated electromechanical systems.
2Measurement precision
If manual positioning is used, then the camera can be aligned, but it significantly impairs and delays the quality of inspection
Solution Approach 1:
The inspection unit autonomously performs positioning and alignment operations without waiting for manual intervention. The system continuously monitors its position and makes real-time corrections, maintaining constant inspection speed without the delays inherent in manual positioning.
Solution Approach 2:
The autonomous positioning system operates continuously throughout the inspection process, constantly measuring and adjusting the camera position. This eliminates the intermittent stoppages and delays that occur with manual positioning, maintaining continuous inspection throughput.
3Measurement precision
If manual positioning is used, then the camera can be positioned, but specialized skills and considerable experience from the operator are required
Solution Approach 1:
The system performs all positioning calculations and adjustments autonomously using sensor data and automated algorithms. No operator expertise in positioning techniques is required, as the system independently determines the optimal camera position and executes the necessary corrections.
Solution Approach 2:
The complex manual positioning operations requiring specialized skills are replaced by automated sensor systems and processing units that objectively calculate position and execute corrections, eliminating the need for operator experience and expertise.
4Measurement precision
If manual positioning is used, then the camera can be aligned, but there is a risk that the camera will collide with the channel wall
Solution Approach 1:
The sensor system continuously provides feedback on the inspection unit's position relative to the pipe center and walls. This real-time feedback allows the automated positioning system to detect and correct potential collisions before they occur, ensuring safe operation throughout the inspection.
Solution Approach 2:
The system autonomously monitors its own position and independently makes corrective movements to avoid wall collisions, eliminating the human error and delayed reaction that can occur with manual positioning when safety issues arise.
5Ease of operation
If the camera is mounted on a lifting unit, then the operator can control alignment, but the process is complex and prone to errors
Solution Approach 1:
The lifting unit is controlled autonomously by the automated positioning system based on sensor feedback. The system independently calculates the required adjustments and commands the lifting unit to make precise movements, eliminating operator error while maintaining ease of control.
Solution Approach 2:
Manual control of the lifting unit is replaced by automated electronic control systems that precisely regulate the lifting unit's movements based on real-time sensor data, improving both ease of operation and alignment accuracy.
6Adaptability or versatility
If visual alignment is eliminated, then other inspection units can be aligned, but the possibility of visual alignment is lost
Solution Approach 1:
Visual alignment methods are replaced by sensor-based detection systems that use electromagnetic or optical sensors to automatically measure positions and calculate alignment. This substitutes human visual assessment with precise instrumental measurement, maintaining versatility while improving precision.
Solution Approach 2:
The inspection units autonomously perform alignment using sensor feedback and automated calculations, eliminating the need for visual alignment while maintaining the ability to align multiple types of inspection units through the same automated system.
Data Source
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AI summary
A sewer inspection and/or maintenance system is provided, comprising at least: - a sensor system (S) capable of detecting at least three distances (d1; d2; d3) between a predetermined first point (P) in the sewer pipe and the pipe wall (W); - a processing unit (VE) adapted to determine a diameter (d) of the sewer pipe and a predetermined second point (C) in the sewer pipe based on the detected distances (d1; d2; d3); - a horizontal offset (ΔX) and a vertical offset (ΔY) between the predetermined first point (P) and the predetermined second point (C) based on the determined diameter (d) and the detected distances (d1; d2; d3); and - a positioning unit (H) adapted to correct the position of an inspection unit in the sewer pipe by the two offsets. A suitably designed procedure is also provided.