Sensor designed to improve vision of subaqueous vehicles

Subaqueous vehicles will helps the oil and gas industry with inspecting underwater pipelines and more.

By Libby Haydel April 5, 2022
Courtesy of: Louisiana State University

Underwater exploration is becoming more common, thanks to subaqueous vehicles that have capabilities to photograph and collect data at deeper depths and for longer periods of time. These vehicles require the best imaging devices, research that LSU Engineering professors Jinwei Ye and Corina Barbalata are working on thanks to a three-year National Science Foundation grant.

“We propose to develop novel angularly-sampled imaging systems and computational algorithms to advance the vision-sensing capacity of underwater vehicles,” Ye said. “The key idea is to couple angularly-encoded light sources with an angularly-sampled imaging device to acquire correspondences among light rays. We’ll integrate our imaging system with underwater marine vehicles and use it to facilitate robotic applications, such as autonomous navigation and sea floor mapping.”

The project will benefit the oil and gas industry, which can use it to inspect underwater pipelines; the military, which may be able to use their sensing technology for submarines and decreasing the cost, challenges, and risks associated with ocean exploration; and for researchers studying sea life and coral reefs.

Ye, an adjunct faculty member in the LSU Division of Computer Science and Engineering, said the first year of the project will be simulation, algorithm design, and theory development, while the second year will be experimentation in a water tank. The last year will involve field experiments in the Gulf of Mexico or nearby lakes.

Barbalata, an assistant professor in the LSU Department of Mechanical & Industrial Engineering, is helping with the testing of the imaging system that will be deployed in subaqueous vehicles and used to help the vehicle navigate the environment.

“We are going to look at tracking various aspects in the underwater environment and design a control structure based on this computational imaging system,” she said.

“The most challenging part of designing an underwater imaging system is to cope with the low visibility in murky water,” said Zhang Chen, a postdoctoral student who is working with Ye on the imaging system design for the project. “We design smart light sources whose emitted light rays are coupled with the receiving camera in order to ‘dodge’ the scattering particles in water.”

Ye said the underwater environment is very different from land, so the cameras they use must be designed differently.

“The better the robots can see, the better they can survey, and that info can be used as feedback for robot control,” she said.

Original content can be found at Oil and Gas Engineering.

Author Bio: Libby Haydel, communications specialist, LSU College of Engineering