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Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

Published on: September 27, 2019

Micro digital sun sensor with linear detector.

Qiao-Yun Fan¹, Jia-Wen Peng¹, Xin-Yang Gao¹

¹Key Laboratory of Precision Opto-Mechatronics Technology, School of Instrument Science and Opto-Electronics Engineering, Ministry of Education, Beihang University, Beijing 100191, People's Republic of China.

The Review of Scientific Instruments

|August 1, 2016

Summary

This summary is machine-generated.

This study introduces a compact micro digital sun sensor using a V-shaped slit and CCD for accurate sun-ray angle measurement. The novel design offers a wide field of view and high accuracy, ideal for micro/nanosatellites.

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Area of Science:

Aerospace Engineering
Sensor Technology
Microtechnology

Background:

Accurate sun-ray angle measurement is critical for satellite attitude determination.
Existing sun sensors often face limitations in field of view, accuracy, or size for small satellite applications.

Purpose of the Study:

To design and validate a novel micro digital sun sensor for micro/nanosatellites.
To achieve a wide field of view (FOV) with high accuracy and low power consumption.

Main Methods:

Utilized a V-shaped slit and a linear array CCD for sun-ray angle measurement.
Implemented a highly integrated microprogram control unit for system simplicity and compactness.
Employed error compensation, accurate calibration, adaptive threshold, and adjustable exposure time for enhanced performance.

Main Results:

Achieved a wide FOV of ±65° × ±65°.
Demonstrated high accuracy of 0.1° across the entire FOV.
Operates reliably at a 25 Hz update rate with a low power consumption of 200 mW.

Conclusions:

The novel micro digital sun sensor design is effective and suitable for micro/nanosatellite applications.
The sensor's performance, including its wide FOV, accuracy, and low power, makes it a promising solution for small satellite attitude determination.