Designing biaxial Lidar range finder based on continuous wave time of flight for middle-range application

A continuous wave-time of flight (ToF) optical ranging is now widely applied in designing Lidar range finders. By using this technique, a phase difference is used to calculate a distance of an object. In our work, we develop a biaxial Lidar range finder employing a visible laser diode modulated by c...

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Bibliographic Details
Main Authors: Rianaris, Agitta, Nugraha, Okrisal Reka, Pratomo, Hari, Nami, Osen Fili, Afrisal, Hadha, Hanto, Dwi
Format: Conference Proceeding
Language:English
Subjects:
Avalanche diodes
Continuous radiation
Emitters
Error analysis
Lidar
Linearity
Obstacle avoidance
Phase shift
Range finders
Semiconductor lasers
Waveforms
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Summary:A continuous wave-time of flight (ToF) optical ranging is now widely applied in designing Lidar range finders. By using this technique, a phase difference is used to calculate a distance of an object. In our work, we develop a biaxial Lidar range finder employing a visible laser diode modulated by continuous waveform as an emitter and a Si-based avalanche photodetector as a receiver. In this experiment, a reflective target to determine a distance was utilized to measure the distance between 37 cm and 20 m with a clear signal. The result reveals that the correlation between distance and phase difference within the 20 m by applying 10 MHz of modulation frequency has a linear discontinuity problem. Thus, it creates an ambiguous range and misinterpretation of the distance. To resolve this problem, we report on successive recorded phase difference which is manually reconstructed by dividing them into some areas based on their linearity and continuity on the graph. With this method, the actual distance was measured with an error of 2 cm. The proposed design might be suitable for middle-range Lidar range-finder systems applications such as obstacle avoidance, as a cost-effective solution.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0205738