UAV Height-Based Vision Mode Switching for Precise Depth Sensing
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Solution Overview
Problem
Current vision technology for operating Unmanned Aerial Vehicles (UAVs) is limited in precision and performance across a wide range of heights, restricting its effectiveness at both low and high altitudes due to inherent shortcomings in stereo vision systems.
Innovation Solution
A method and system for selecting operation modes of a mobile platform based on detected height and disparity, utilizing a combination of sensors such as barometers, ultrasonic detectors, GPS, and binocular imaging systems to switch between different modes, including very low altitude monocular, stereo vision with varying resolutions, and high altitude monocular modes, to ensure accurate depth measurement across various heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stereo vision technology is used for UAV navigation, then depth measurement capability is improved, but measurement precision deteriorates at extreme heights (very low or very high altitudes)
Solution Approach 1:
The system dynamically switches between different operation modes (monocular mode, stereo vision mode, hybrid mode) based on the detected height of the UAV. This dynamic adaptation ensures optimal depth measurement precision across varying altitude ranges by selecting the appropriate sensing strategy for each height condition.
Solution Approach 2:
The system changes operational parameters (sensing mode, sensor activation) based on height thresholds. By monitoring height and transitioning between modes when thresholds are crossed, the system maintains measurement precision across the full operational height range while adapting to the specific constraints of each altitude zone.
2Measurement precision
If multiple sensors and operation modes are implemented, then measurement precision across wide height range is improved, but device complexity increases
Solution Approach 1:
The system integrates multiple sensors (monocular camera, stereo vision system, barometer, GPS, ultrasonic detector) that can serve multiple functions across different operation modes. This multi-functionality allows a single integrated system to handle various height ranges and measurement requirements without requiring separate dedicated systems for each mode.
Solution Approach 2:
The system dynamically activates or deactivates specific sensors and modes based on current operational conditions. This dynamic sensor management reduces the effective complexity at any given moment by only activating the necessary components for the current height range, while maintaining the capability to switch to other modes when needed.
3Ease of operation
If vision technology is used for UAV operation, then ease of operation is improved, but reliability deteriorates at extreme heights due to limited performance
Solution Approach 1:
The system introduces intermediary sensors (barometer, GPS, ultrasonic detector) that work in conjunction with the vision system to provide reliable height and distance information. These intermediary sensors act as mediators that enhance the reliability of the overall navigation system when the primary vision technology alone would be insufficient at extreme heights.
Solution Approach 2:
The system dynamically transitions between different operation modes to maintain reliability across varying height conditions. By automatically switching to appropriate modes (monocular, stereo, or hybrid) based on detected height thresholds, the system ensures consistent operational reliability throughout the full height range while maintaining ease of automated 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
Enables accurate and precise operation of UAVs across a wide range of heights by dynamically switching operation modes, improving navigation and depth measurement capabilities beyond the limitations of conventional stereo vision systems.
Implementation Method 1
obtaining the height via a barometer
Implementation Method 2
obtaining the height via an ultrasonic detector
Implementation Method 3
acquiring the disparity between the first and second images of the object as captured by a binocular imaging system
Data Source
AI summary
A method for selecting an operation mode of a mobile platform includes detecting a height grade of the mobile platform and selecting an operation mode of the mobile platform according to a result of the detecting.