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A Bio-Inspired Polarization Sensor with High Outdoor Accuracy and Central-Symmetry Calibration Method with
Yinlong Wang1, Jinkui Chu2, Ran Zhang1
1Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian 116024, China.
This study introduces two new calibration methods for bio-inspired polarization sensors, improving indoor accuracy. Outdoor performance requires specific parameter adjustments, particularly those sensitive to light spectrum, to maintain high accuracy.
Area of Science:
- Robotics and Navigation
- Bio-inspired Sensors
- Optical Engineering
Background:
- Polarization sensors offer a bio-inspired approach to navigation.
- Existing calibration methods have limitations in accuracy and adaptability.
Purpose of the Study:
- To evaluate a bio-inspired polarization sensor with lenses for navigation.
- To introduce and validate two novel calibration methods: central-symmetry and noncontinuous calibration.
- To analyze factors affecting outdoor sensor performance.
Main Methods:
- Implemented central-symmetry calibration using an integrating sphere.
- Performed noncontinuous calibration.
- Analyzed calibration parameter types using the replacement method.
- Compared indoor and outdoor experimental results.
Main Results:
- Central-symmetry calibration effectively optimized voltage deviations, enhancing sensor performance.
- The proposed calibration methods demonstrated superior indoor accuracy (±0.009°).
- Outdoor accuracy was significantly influenced by light spectrum-dependent parameters, requiring specific adjustments for optimal performance (±0.05° static, ±0.5° dynamic heading deviation).
Conclusions:
- The novel calibration methods significantly improve the accuracy of bio-inspired polarization sensors.
- Outdoor sensor accuracy is critically dependent on light spectrum calibration parameters.
- Further research is needed to optimize outdoor calibration for dynamic conditions and varying light spectra.
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