Pitch-Adjustable Canard Wings for TVG Layback and Separation Control
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Solution Overview
Problem
Conventional transverse gradiometer (TVG) tow frames experience interference and accuracy issues due to short layback distances, while long layback distances cause data gaps, especially in high cross water current conditions, exceeding regulatory cross-track separation limits.
Innovation Solution
A TVG towed apparatus with independently pitch-adjustable canard wings and a rear wing surface, allowing for controlled roll and yaw adjustments to maintain optimal layback distance and reduce cross-track separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If short layback distance is used, then survey efficiency is improved, but magnetic interference and accuracy deteriorate
Solution Approach 1:
The patent applies dynamics by making the towed apparatus actively controllable with adjustable pitch and roll angles through control surfaces (elevators and ailerons). This allows the system to dynamically adjust its position and orientation in real-time, enabling it to maintain optimal layback distance while compensating for magnetic interference from the tow vessel, thus resolving the contradiction between survey efficiency and accuracy.
2Measurement precision
If long layback distance is used, then magnetic interference is reduced, but cross-track separation and data gaps increase
Solution Approach 1:
The patent implements feedback control through active control surfaces (elevators for pitch, ailerons for roll) that respond to environmental conditions and position data. This feedback mechanism allows the towed apparatus to automatically adjust its layback distance and cross-track position, maintaining optimal separation from the tow vessel while minimizing magnetic interference and preventing data gaps, thus resolving the contradiction between survey accuracy and ease of operation.
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 system reduces cross-track separation to within regulatory limits, enhances survey accuracy by minimizing interference, and improves operational safety in varying water depths.
Implementation Method 1
a first canard wing and a second canard wing, each having a respective leading edge. The first canard wing is rotatable about its leading edge to adjust a pitch attitude of the TVG towed apparatus. The second canard wing is rotatable about its leading edge to adjust the pitch attitude of the TVG towed apparatus
Implementation Method 2
The first canard wing is rotatable about its leading edge to adjust a pitch attitude of the TVG towed apparatus. The second canard wing is rotatable about its leading edge to adjust the pitch attitude of the TVG towed apparatus. In some aspects, the pitch of the second canard wing is adjustable independently from a pitch of the first canard wing
Data Source
AI summary
Described herein are systems and apparatus for transverse gradiometer (TVG) acquisition using a towed platform. A first wing surface that is pitch-adjustable based on rotation about a leading edge of the first wing surface. A second wing surface that is pitch-adjustable based on rotation about a leading edge of the second wing surface, and wherein a pitch of the second wing surface is adjustable independently from a pitch of the first wing surface. Unlocking insights from Geo-Data, the present invention further relates to improvements in sustainability and environmental developments: together we create a safe and livable world.