Locally made device maps ocean floor

The 60kg vehicle has a composite shell and can collect data from 1-1,000 metres below the surface. It sends data to an analysis centre via radio signal and the General Packet Radio Service (GPRS).

Equipped with data recording software, a camera, a satellite locator, an antenna and an echo sounding device, the vehicle runs on two batteries and can operate for eight to 10 hours straight.

It performed well when tested in fast-flowing areas of the Lo and Da rivers and near the island district of Van Don in the coastal province of Quang Ninh.

The vehicle was created by researchers from the Vietnam Institute of Geodesy and Cartography under the Ministry of Natural Resources and Environment (MONRE) as a result of a project that is running from January 2018 to June 2020.

It operates with two systems that have never been successfully assembled in Vietnam before, according to Luu Hai Au, director of the institute’s Centre for Informatics and Geodesy.

They include a satellite positioning system running with virtual reference station (VRS) technology attached to an unmanned aerial vehicle and a software system that integrates echo sounding devices via an internal measurement unit, he said.

“The theories of operation of these two systems were thoroughly studied by MONRE and were proven effective after being put into production,” Au said.

"Mapping the topography of the ocean floor and river beds with echo sounding devices attached to unmanned surface vehicles is new to Vietnam, though the technique is practised worldwide," he said.

The unmanned surface vehicle would help create large-scale topographic maps of areas with dangerous terrain inaccessible to humans and those that are polluted, he said.

“It can also gather water pollution data and help to detect factories that release untreated waste into the environment,” said Au.

Source: NDO