Real-time Light Source Incidence Angle Tracking Method

Method for Tracking Light Source Incidence Angle Using Theoretical Calculation and Measurement Offset Correction

This technology is a real-time light source incidence angle tracking method that controls the orientation of a collector unit mounted on the end of a robot manipulator. It involves calculating the theoretical light source angle using position/orientation data and weather information, and then fine-tuning the manipulator through a feedback control system that calculates the actual incidence angle error using an LDR sensor-based compartmentalized measurement unit.

Solar position calculations based on theoretical formulas often deviate from the actual incidence angle due to light scattering caused by weather conditions such as clouds, fog, and yellow dust, which leads to reduced light collection efficiency.

This technology utilizes GPS, compass, and weather data for initial positioning, followed by a closed-loop control system. It detects the actual incidence angle, including scattered light, via a light-dependent resistor (LDR) measurement unit composed of a central compartment and surrounding compartments, and performs real-time fine-tuning of the robot manipulator based on offset calculations derived from measured voltage values.

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Key Features:

• Calculating the theoretical angle of the light source using the position and orientation information of the light collection device and time values queried from local weather stations.
• Operating the robot manipulator so that the plane of the collector unit at the end of the manipulator is perpendicular to the theoretical angle of the light source.
• Reading values measured by the sensor unit mounted on the robot manipulator to calculate the offset angle from the actual angle of the light source.
• Precisely tracking the incidence angle by adjusting the orientation of the collector unit based on the calculated offset angle.

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