Structured Light Object Detection for Motion Control
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Solution Overview
Problem
3D camera systems face challenges in efficiently detecting moving objects within a wide range while managing limited computing resources, particularly when focused on moving targets, as they require significant processing power and time.
Innovation Solution
An object detection system for motion-control devices that includes a projecting unit, image sensing unit, and processor, which projects structured light, senses reflected light, and adjusts scanning frequency and resolution based on detected objects to optimize resource usage and determine if objects are entering a safe region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the 3D camera scans a wide range with high scanning frequency and high resolution, then the detection precision and coverage are improved, but the processing load and power consumption increase significantly
Solution Approach 1:
The patent applies dynamic adjustment of scanning parameters by detecting object motion states and adaptively modifying scanning frequency and resolution. When objects are detected, the system increases scanning frequency and resolution for those regions; when no objects are present, it reduces parameters to save power. This dynamic adaptation resolves the contradiction between maintaining high detection precision and reducing power consumption.
Solution Approach 2:
The patent implements local quality enhancement by applying high scanning frequency and resolution only to regions containing detected objects, while using lower parameters for other regions. This selective application of high-quality scanning to specific areas of interest maintains detection precision where needed while reducing overall power consumption across the entire scanning field.
2Speed
If the 3D camera increases scanning frequency to track moving objects, then the detection speed is improved, but the processing load on the processor increases
Solution Approach 1:
The system dynamically adjusts scanning frequency based on detected object motion. When objects are detected, scanning frequency increases to track them; when no objects are present, frequency decreases. This dynamic control maintains high detection speed for moving objects while reducing processing load during periods of low activity.
Solution Approach 2:
The patent applies partial action by increasing scanning frequency and resolution only for regions containing objects rather than uniformly across the entire field. This selective enhancement maintains detection speed for relevant targets while avoiding excessive processing load from scanning entire regions at high parameters.
3Measurement precision
If the 3D camera uses high scanning resolution for wide range detection, then the image quality is improved, but the time required for scanning increases
Solution Approach 1:
The patent applies high scanning resolution locally only to regions containing detected objects rather than uniformly across the entire scanning range. This selective high-resolution scanning maintains image quality for objects of interest while significantly reducing the time required to scan the entire wide range at high resolution.
Solution Approach 2:
The system dynamically adjusts scanning resolution based on object detection results. When objects are detected, high resolution is applied to those regions; when no objects are present, resolution is reduced. This dynamic adaptation maintains image quality where needed while reducing scanning time for the overall system 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
This system effectively determines if objects are moving into a safe region by adjusting scanning parameters, reducing processing load and power consumption, and improving image resolution only where necessary, thereby enhancing the detection efficiency and resource management.
Implementation Method 1
The projecting unit projects a plurality of sets of structured light
Implementation Method 2
The image sensing unit senses reflected structured light
Data Source
AI summary
The present invention provides an object detecting system, adapted to a motion-control device, including at least one projecting unit, at least one image sensing unit and a processor. The projecting unit projects a plurality of sets of structured light corresponding to a first scanning resolution with a first scanning frequency toward a first direction. The image sensing unit senses the reflected structured light. The processor obtains a plurality of three-dimensional images corresponding to the first direction according to the sensed structured light, and determines whether there is at least one object that will move into a safe region of the motion-control device according to the three-dimensional images. When the processor detects the object, the processor adjusts the first scanning frequency and/or a scanning region of the projecting unit or the first scanning resolution.