Wireless Command Interface for Unmanned Underwater Vehicles using an Optical Link
Date Issued
2014
Date
2014
Author(s)
Lin, Jie-Yuan
Abstract
An underwater wireless optical communication system is presented in this thesis. It serves as a moderate-distance and unidirectional wireless communication interface between underwater vehicles and humans in a shallow or narrow water environment where acoustic waves show unsatisfied communication performances. A high power LED based optical transmitter and a PIN photodiode based optical receiver were built and tested. They are connected with respective computers and On-Off Keying (OOK) modulation method is applied for optical waves to carry binary data packets. Hamming codes and Manchester codes are chosen to construct the data packets. They enhance the ability of data packets to escape from possible bit errors during the transmission. Experiment results of data transmission in static and dynamic manner to an autonomous underwater vehicle in an aquarium are demonstrated to show the system performance. The packet error rates （PER） increase with increased vehicle speeds and larger distances to the LEDs. The PER at the vehicle speed of 0.8 m/s, and at a distance of 3 meters to the LED light source was about 10%.
Subjects
水下無線光通訊
水下載具
水族箱
水下技術
Type
thesis
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ntu-103-R00525018-1.pdf
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