Compact Inclination Detection Using Lens Arrays
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Solution Overview
Problem
Existing inclination detectors for geodetic instruments are too large, costly, and lack compatibility with modern sensor technologies, requiring improvements for smaller size, lower height, and scalability with varying demands on working range, accuracy, and size, while also needing semi-automated manufacturing and compatibility with modern data interfaces.
Innovation Solution
A compact inclination detection system using a point source of light, a lens, and a two-dimensional array of detector elements to form a defocused image, where the center of gravity is calculated to determine vessel inclination, with features like temperature correction and sub-pixel precision, and integration with geodetic instruments for accurate orientation and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single large plano-convex ball lens is used in a two-axis inclination detector, then the detection function is achieved, but the overall size and height become too large for many applications
Solution Approach 1:
The patent divides the optical system into multiple discrete components: a lens array with multiple lens elements, a separate detector array, and a light source array. This segmentation allows each component to be optimized independently and enables compact integration while maintaining detection accuracy through the coordinated operation of multiple elements.
Solution Approach 2:
The patent transitions from using a single large lens to a two-dimensional lens array, where multiple smaller lens elements are arranged in a grid pattern. This dimensional change allows the optical functionality to be distributed across multiple elements, reducing the overall footprint and height while maintaining the required detection precision through the collective contribution of all lens elements.
2Measurement precision
If traditional inclination detectors are used, then inclination detection is achieved, but the cost is high and compatibility with modern sensor technologies is limited
Solution Approach 1:
The patent employs a detector array that can be implemented using modern CMOS or CCD sensor technologies, making the system compatible with contemporary manufacturing processes and digital interfaces. The modular architecture allows the same basic design to serve multiple applications and be integrated with various modern electronic systems, enhancing versatility while maintaining measurement precision.
Solution Approach 2:
The patent replaces traditional mechanical inclination detection mechanisms with an optical-digital system using lens arrays and electronic detector arrays. This substitution eliminates complex mechanical linkages and enables direct digital signal processing, improving compatibility with modern technologies while preserving the ability to achieve high measurement precision through optical principles.
3Reliability
If conventional inclination detectors are used, then detection functionality is provided, but the overall height and manufacturing complexity are high
Solution Approach 1:
The patent combines multiple functional elements into integrated arrays: lens elements are arranged in a lens array that works in unison with a corresponding detector array and light source array. This merging of multiple simple elements into coordinated arrays achieves reliable detection functionality while reducing the complexity of individual components and simplifying the overall system architecture compared to traditional single-element designs.
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 solution provides a compact, cost-effective, and scalable inclination detection system that offers high precision and compatibility with modern technologies, enabling accurate orientation and alignment of geodetic instruments across various applications.
Implementation Method 1
a lens situated in an optical path between the reflective surface and a focal plane of the lens
Implementation Method 2
Light reflected from the surface passes through the lens to form a defocused image of the point source on a two-dimensional array of detector elements
Data Source
AI summary
Apparatus and methods for detecting inclination employ a point source of light from which light is emitted through a lens toward a reflective surface of a liquid contained in a vessel. Light reflected from the surface passes through the lens to form a defocused image of the point source on a two-dimensional array of detector elements. Data acquired from the array represents intensity of the light incident on each of the detector elements. A center of gravity representing inclination of the vessel is determined from the data.