Distance-Adaptive Landing Target Pattern for UAV Guidance
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Solution Overview
Problem
Existing target members for unmanned aircraft landing sites are difficult to detect from high altitudes due to blurriness, preventing accurate computation of positional relationships and successful landing.
Innovation Solution
A target member formed by multiple feature members whose shapes change according to measurement distance, allowing the moving body guidance apparatus to distinguish and guide the aircraft using blurred images at varying altitudes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional target member with fixed shape is used, then the target can be clearly captured at low altitude, but the target becomes blurry and undetectable at high altitude
Solution Approach 1:
The target member dynamically changes its shape based on the altitude of the unmanned aircraft. At high altitudes, the target displays a first shape that is easily detectable, and at low altitudes, it transitions to a second shape that provides precise positioning information. This dynamic adaptation resolves the contradiction between detectability at high altitude and precision at low altitude.
Solution Approach 2:
The target member changes its geometric parameters (shape, size, or pattern) according to the measurement distance from the unmanned aircraft. By adjusting these parameters based on altitude, the target maintains optimal detectability and measurement precision across different flight phases, from approach to landing.
2Measurement precision
If GPS is used for positioning, then global location can be determined, but accurate positioning at small landing sites in high-density areas is difficult
Solution Approach 1:
The target member serves as an intermediary object between the unmanned aircraft's image capturing apparatus and the landing site. By capturing images of this intermediate target and computing its positional relationship, the system achieves accurate positioning at small landing sites without relying on GPS, thus resolving the contradiction between positioning accuracy and system complexity.
3Measurement precision
If the target size is increased for high-altitude detection, then the target becomes detectable from distance, but the target occupies excessive space at the landing site
Solution Approach 1:
The target member dynamically adjusts its effective size through shape transformation. When viewed from high altitude, the target displays an expanded first shape that occupies sufficient area for detection. When viewed from low altitude, it transforms to a compact second shape that fits within the limited landing site space, resolving the contradiction between detection distance and target area.
Data Source
AI summary
Provided is a target member for accurately guiding a moving body to a target site. A target member 10 is used when performing control for guiding a moving body 20 to a target site, and the target member 10 is formed by using two or more different feature members 11, 12 that are set such that a shape of a target member image 44 that corresponds to the target member 10 captured by an image capturing unit 21 (an image capturing apparatus) that is mounted in the moving body 20 changes according to a measurement distance that indicates a distance between the target member 10 and the moving body 20.