Ladar Object Detection Using Intersecting Multicolor Laser Planes
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Solution Overview
Problem
Current object detection systems face challenges in effectively detecting objects at rotating intersecting planes of light, particularly in creating a three-dimensional representation of objects using laser detection and ranging (LADAR) technology, where existing methods struggle to accurately capture and process the intersection of multiple laser beams of different colors to generate a stable and rotating plane of light for precise object detection.
Innovation Solution
The method involves projecting a first laser beam of one color and a second laser beam of another color using laser line projectors, adjusting their planes to create a beam intersection line plane of a third color, which is then detected by an image or color capture device. This system includes a motor to rotate the projectors, creating a rotating plane of light, and uses bandpass filters to enhance the signal-to-noise ratio by rejecting out-of-band colors, allowing for the creation of a three-dimensional LADAR image representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple laser beams of different colors are projected and intersected to create a three-dimensional representation, then object detection precision is improved, but device complexity increases
Solution Approach 1:
The system segments the detection task by using multiple laser beams of different colors (e.g., red and green) that intersect to create distinct detection planes. Each laser beam projects a separate plane, and their intersection creates a unique three-dimensional detection zone, allowing precise object detection through color-coded spatial segmentation.
Solution Approach 2:
The patent introduces bandpass filters as intermediary components that selectively transmit specific laser wavelengths while blocking others. These filters act as mediators between the multiple laser sources and the detector, enabling the system to process multiple colors simultaneously without cross-interference, thus managing device complexity while maintaining detection precision.
2Reliability
If bandpass filters are used to enhance signal-to-noise ratio by rejecting out-of-band colors, then detection reliability is improved, but device complexity increases
Solution Approach 1:
Bandpass filters serve as intermediary optical components that selectively transmit only the wavelengths of interest while blocking out-of-band colors. This mediation enhances detection reliability by ensuring that the detector receives only the intended laser signals, thereby improving signal-to-noise ratio and reducing false detections.
Solution Approach 2:
The system utilizes color-selective filtering where bandpass filters are designed to transmit specific colors (wavelengths) of the laser beams while rejecting others. This color-based discrimination mechanism improves detection reliability by enabling the system to distinguish between different laser planes and their intersections through wavelength identification.
3Adaptability or versatility
If the laser line projectors are rotated to create a rotating plane of light, then object detection capability in three-dimensional space is improved, but device complexity increases
Solution Approach 1:
The system transitions from static to dynamic operation by rotating the laser line projectors around a central axis. This rotation creates moving detection planes that sweep through three-dimensional space, enabling the system to detect objects at various positions and angles. The dynamic rotation mechanism enhances adaptability and versatility in object detection while maintaining a relatively simple mechanical structure.
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 approach enables the generation of accurate three-dimensional LADAR image representations by capturing the intersection highlights, providing enhanced object detection and ranging capabilities, particularly suitable for applications like aircraft collision avoidance and robotic vehicle navigation.
Implementation Method 1
projecting a first laser beam of a first color with a first laser line projector; projecting a second laser beam of a second color with a second laser line projector
Implementation Method 2
The system may comprise one or more bandpass filters to pass through the at least first and second colors that form the beam intersection line plane, and reject the out-of-band colors to enhance the beam intersection line plane
Implementation Method 3
a motor to rotate the first laser line projector and the second laser line projector to create a rotating plane of light of the third color on the object
Data Source
AI summary
Methods, apparatuses, and systems may provide for the detection of an object at a rotating intersecting plane of light created by synchronously rotating a first plane of light and a second plane of light. A first laser beam of a first color may be projected with a first laser line projector and a second laser beam of a second laser beam of a second color may be projected with a second line projector. Laser planes of the first and second laser beams may be adjusted to create a beam intersection line plane of a third color on an object located at a predetermined intersection range from the first and second laser line projectors. The first and second laser line projectors may be rotated to create a rotating plane of light of the third color on the object.