3D Perception System Using Phase Shifting for Mobile Navigation
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Solution Overview
Problem
Current 3D modeling and navigation systems for mobile devices are costly, require significant computational processing, and involve complex hardware and skilled professionals, limiting their effectiveness and accessibility for autonomous navigation and mapping applications.
Innovation Solution
An autonomously navigated mobile platform using a projector and sensor with phase shifting algorithms to generate encoded signals, detect reflections, and identify x, y, and z-axis dimensions, as well as range and bearing data, allowing for efficient navigation and mapping without the need for extensive computational power or expensive equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If triangulation systems or stereoscopic systems are used to generate 3-D models, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the projector and sensor into a single integrated unit mounted on the mobile platform. This merging of components simplifies the overall system architecture while maintaining the capability to project encoded patterns and capture reflections for 3-D data acquisition, thereby reducing device complexity without sacrificing measurement precision
Solution Approach 2:
The integrated projector-sensor unit serves multiple functions: it projects encoded light patterns for 3-D mapping, captures reflected patterns for data acquisition, and provides navigation and localization capabilities. This multi-functionality reduces the need for separate specialized equipment, thereby reducing overall device complexity and cost while maintaining measurement accuracy
2Productivity
If SLAM and 3-D perception systems are used for mobile navigation, then productivity is improved, but device complexity and computational requirements increase
Solution Approach 1:
The system pre-encodes light patterns with specific spatial frequencies and phase information before projection. This preliminary encoding of the light patterns allows the sensor to capture multiple depth ranges simultaneously in a single measurement, eliminating the need for complex real-time computational processing during operation, thereby maintaining high navigation efficiency while reducing computational complexity
Solution Approach 2:
The patent changes the parameters of the projected light patterns by using encoded patterns with specific spatial frequencies and phase shifts. This parameter encoding allows the system to extract multiple depth measurements from single images through simple correlation operations, significantly reducing computational requirements while maintaining navigation productivity
3Measurement precision
If high resolution patterns are used in coding schemes, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The system uses periodic phase-shifting patterns projected onto the scene, where the light patterns cycle through different phase states. This periodic modulation allows the sensor to extract multiple depth measurements from a sequence of rapidly captured images, achieving high spatial resolution while minimizing measurement time through efficient temporal sampling
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
Enables cost-effective and efficient generation of 3D data for navigation and mapping, reducing the complexity and cost of hardware requirements while providing accurate location and navigation capabilities for mobile devices.
Implementation Method 1
detecting the emitted signal with the sensor after the emitted signal is reflected by a detected body
Data Source
AI summary
In one embodiment, an autonomously navigated mobile platform includes a support frame, a projector supported by the frame, a sensor supported by the frame, a memory including a plurality of program instructions stored therein for generating an encoded signal using a phase shifting algorithm, emitting the encoded signal with the projector, detecting the emitted signal with the sensor after the emitted signal is reflected by a detected body, associating the detected signal with the emitted signal, identifying an x-axis dimension, a y-axis dimension, and a z-axis dimension of the detected body, and one or more of a range and a bearing to the detected body, based upon the associated signal, identifying a present location of the mobile platform, navigating the mobile platform based upon the identified location, and a processor operably connected to the memory, to the sensor, and to the projector for executing the program instructions.