Dual-Axis Mirror Scanning Assembly for Vibration-Resistant Detection
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Solution Overview
Problem
Existing vehicle detection systems face challenges in achieving a wide field of view with high resolution and accuracy while being cost-effective and resistant to vibrations and shocks.
Innovation Solution
A scanning assembly for a detection system that includes a scanning fixture with a mirror attached to a pivot system, which allows for rotation around two orthogonal axes, coupled through a central member, and attached to a base for mounting on a vehicle. This design uses flexible sheets to absorb vibrations and electromagnets to control the mirror's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a scanning assembly is added to increase field of view, then detection coverage is improved, but susceptibility to vibration and shock increases
Solution Approach 1:
The patent introduces flexible sheets as intermediary elements between the scanning fixture and the vehicle base. These flexible sheets act as vibration-isolating mediators that decouple the scanning assembly from direct mechanical coupling to the vehicle chassis, thereby reducing transmission of vibration and shock while preserving the expanded field of view capability
Solution Approach 2:
The patent employs flexible sheets (thin films) to connect the scanning fixture to the base structure. These flexible films provide mechanical coupling for structural support while simultaneously filtering out high-frequency vibrations and shocks, thus protecting the sensitive scanning components while maintaining the extended detection coverage
2Measurement precision
If additional components are added to improve detection range and resolution, then detection accuracy is improved, but system cost increases
Solution Approach 1:
The patent uses optical reflection through mirrors to create virtual copies of the detection path, enabling extended field of view and multi-directional scanning without duplicating expensive transmitter and receiver components. The mirror assembly effectively copies the optical path geometry to achieve coverage that would otherwise require multiple independent detection units
Solution Approach 2:
The scanning assembly with dual-axis pivots and mirrors serves multiple functions simultaneously: it expands field of view, maintains detection resolution, and provides mechanical vibration isolation. This multi-functional design achieves improved detection capabilities without proportionally increasing system cost by consolidating multiple benefits into a single integrated assembly
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 scanning assembly provides a cost-effective solution that enhances the detection system's field of view, resolution, and accuracy while minimizing the impact of vehicle vibrations, resulting in improved object detection capabilities.
Implementation Method 1
rotation of the first pivot around the first axis causes the first flexible sheet to bend in torsion, the first flexible sheet forming a first plane and resisting movement of the first section with respect to the second section along the first plane
Implementation Method 2
The scanning fixture is coupled to the base exclusively through attachment of the first pivot to the second pivot via the central member... minimizing the impact of vehicle vibrations
Implementation Method 3
The first mirror has a reflective surface providing a first field of view between the detection system and a surrounding environment, rotation of the first pivot around the first axis turning the first mirror to change the first field of view
Implementation Method 4
A first electromagnet is attached to the base and configured to apply a force to the first permanent magnet to selectively push or pull the first mirror to change the first field of view in the first direction via rotation of the first pivot
Implementation Method 5
A third electromagnet is attached to the base and configured to apply a force to the third permanent magnet to selectively push or pull the central member to change the first field of view in the second direction via rotation of the second pivot
Data Source
AI summary
A scanning assembly for a detection system for a vehicle includes a base, a first and second flexible sheet, and a scanning fixture with a mirror. The scanning fixture is connected to the base via the first flexible sheet and the second flexible sheet. Oscillation of the scanning assembly around a first central axis of the scanning fixture causes each flexible sheet to flex along a length of a plane of said sheet. Oscillation of the scanning assembly around a second central axis of the scanning fixture causes each flexible sheet to flex in torsion along the length of the plane of the sheet.