Laser Scanner Detector Ring Layout for Dense High-Resolution Scanning
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Solution Overview
Problem
Conventional scanning apparatus struggle to achieve accurate and efficient scanning of large and dense scanning zones due to limitations in detector arrangement design and field of view variation.
Innovation Solution
The scanning apparatus employs at least two identically oriented detector arrays arranged on a common circular ring, each with linearly aligned optical detectors, allowing for a dense packing of detectors and minimal gap dimensions, and is combined with a scanning module for rotational movement to cover the scanning zone in detail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single detector array is used to scan a large zone, then the device complexity is reduced, but the measurement precision and scanning resolution deteriorate
Solution Approach 1:
The detector arrangement is segmented into multiple detector arrays (at least two) arranged on a common circular ring. Each detector array contains multiple optical detectors arranged linearly. This segmentation allows the system to maintain high measurement precision across a large scanning zone while keeping each individual detector array relatively simple in structure.
2Measurement precision
If detectors are densely packed to minimize gaps, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The detector arrays are arranged on a common circular ring rather than a flat surface. This curved arrangement allows detectors to be densely packed while minimizing gap dimensions between adjacent detectors. The circular geometry naturally optimizes the spacing and orientation of detectors, achieving high scanning resolution without excessive structural complexity.
3Area of stationary object
If the field of view is varied to cover a larger scanning zone, then the area covered increases, but the measurement precision deteriorates
Solution Approach 1:
Multiple detector arrays are positioned at different angular positions around the circular ring, with each array having a specific orientation. This segmentation allows the system to cover a large scanning zone by distributing detection coverage across multiple arrays while maintaining high measurement precision within each array's field of view.
Solution Approach 2:
The detector arrays are arranged in a two-dimensional circular pattern rather than a single linear array. This dimensional change allows the system to expand the scanning zone area by adding arrays at different angular positions while maintaining high resolution through the dense packing of detectors within each array.
4Measurement precision
If more optical detectors are added to increase scanning density, then the measurement precision improves, but the device complexity and cost increase
Solution Approach 1:
The circular ring arrangement optimizes the spatial distribution of detectors, allowing dense packing without linearly increasing the number of detectors. The curved geometry enables efficient use of detector positions around the ring, achieving high scanning resolution with a moderate number of detectors distributed across multiple arrays.
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
This design enables a compact and highly resolved scanning with improved resolution and efficient illumination, minimizing unnecessary illumination and ensuring high accuracy and redundancy for error correction.
Implementation Method 1
a light transmitter that transmits light into the environment of the scanning apparatus. The transmitted light is reflected (e.g. remitted) by objects in the environment as reception light
Implementation Method 2
an optics 7 in the form of a simple convex lens. This optics 7 is connected upstream of the detectors 4 to deflect (received) light, which is emitted by an object 9, onto the individual detectors 4 in a specific manner
Data Source
AI summary
The present invention relates to a scanning apparatus, in particular a laser scanner. The scanning apparatus comprises a detector arrangement having a plurality of optical detectors; a scanning module that is configured to vary the position and/or the orientation of the field of view of the detector arrangement in order to define a corresponding scanning zone; and an evaluation unit that is configured to obtain information on objects in the scanning zone of the scanning apparatus from the combined detection signals of the detectors of the detector arrangement. According to the invention, the optical detectors of the detector arrangement are designed in the form of at least two detector arrays that are oriented identically to one another and that each have at least three optical detectors arranged linearly in a row. According to the invention, said detector arrays are arranged on a common circular ring that extends perpendicular to the common orientation of said detector arrays.