Sensor Casing Alignment Features for Stable Field-of-View Positioning
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Solution Overview
Problem
Existing optical devices face challenges in easily positioning the field of view, particularly when using movable reflection portions like MEMS mirrors.
Innovation Solution
The sensor device incorporates a casing with a window portion and an optical device that scans objects with electromagnetic waves, featuring recesses or protrusions on its outer surface to align with a virtual straight line through the field of view, allowing for easy positioning and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an optical device is accommodated in a casing without specific positioning features, then the device structure is simple, but the field of view cannot be easily positioned
Solution Approach 1:
The casing is provided with shape portions (recesses or protrusions) that are preliminarily configured to align with the field of view direction. These positioning features are built into the casing structure in advance, allowing the optical device to be easily positioned during installation without requiring complex adjustment mechanisms or additional positioning components.
Solution Approach 2:
The shape portions on the casing act as intermediary positioning elements between the casing and the optical device. These features provide a mechanical interface that guides and stabilizes the field of view direction, serving as a mediator that translates the casing's structural features into precise optical positioning without requiring complex alignment procedures.
2Reliability
If the optical device is secured in the casing without positioning features, then assembly is simple, but the device may rotate and operational stability is reduced
Solution Approach 1:
The shape portions are designed with asymmetric configurations (recesses or protrusions) that create a unique fit between the casing and the optical device mounting structure. This asymmetric design prevents rotational movement by ensuring that only one specific orientation allows proper engagement, thereby eliminating the need for complex anti-rotation mechanisms while ensuring operational stability.
3Manufacturing precision
If no positioning features are provided on the casing, then manufacturing is simple, but component placement precision is poor
Solution Approach 1:
The shape portions for positioning are integrated into the casing manufacturing process itself, rather than being added as separate components. By preliminarily configuring these recesses or protrusions during the casing fabrication, the design achieves precise component placement capability without requiring additional manufacturing steps, assembly operations, or specialized tooling, thus maintaining ease of manufacture while improving precision.
Data Source
AI summary
An outer surface of a casing (100) is provided with a first shape portion (152) and a second shape portion (154). The first shape portion (152) and the second shape portion (154) are engageable with other shape portions located outside the casing (100). The first shape portion (152) and the second shape portion (154) are aligned on the same straight line as a virtual straight line passing through the center of a field of view when viewed from a direction perpendicular to a direction in which the field of view expands. Alternatively, the first shape portion (152) and the second shape portion (154) may be aligned along a direction parallel to this straight line when viewed from the direction perpendicular to the direction in which the field of view expands.