研究目的
To develop an interactive target detection system for tree canopy structure detection and characterization under various laser sensor travel speeds and detection distances.
研究成果
The developed system can detect target objects with acceptable accuracy and has the potential to simulate tractor-mounted scanning LiDAR systems for tree canopy detection and characterization.
研究不足
The accuracy of the laser sensor to characterize canopy structures was significantly affected by both detection distances and travel speeds as they increased from low to high values.
1：Experimental Design and Method Selection:
The system consisted of a sliding motion control system and a Lidar-based target detection unit. The sliding motion control system controlled the laser sensor's movement along a slipway by specifying position and speed as set points. The target detection unit used a laser scanning sensor to measure distances based on the time-of-flight principle.
2：Sample Selection and Data Sources:
Two different sizes of artificial trees were used as targets to verify the system's performance under various conditions.
3：List of Experimental Equipment and Materials:
Included a high-performance AC servo drive, an AC servomotor, a linear aluminum slider, and a laser scanning sensor.
4：Experimental Procedures and Operational Workflow:
The system was tested at different travel speeds and detection distances. Data was processed offline using MATLAB for 3D image reconstruction and analysis.
5：Data Analysis Methods:
The root mean square (RMS) errors and percentage coefficients of variation (CV) of mean dimensions were calculated to determine accuracy and repeatability.
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