DECADES after armed conflicts end, land mines continue
to maim and kill thousands of innocent civilians. Today,
A safer method that would reduce the number of false positives and the time and cost of demining operations has long been needed. To meet this need, a team of Lawrence Livermore engineers led by Christine Paulson and Kique Romero, together with colleagues at First Alliance Technologies, LLC, in San Ramon, California, and Hystar Aerospace Corporation in Vancouver, Canada, has developed the land mine locator. The developers received an R&D 100 Award for this innovative technology. Initial work was funded by Livermore’s Laboratory Directed Research and Development Program.
The land mine locator is an aerial detection system. The system is equipped with Livermore’s LANDMARC (land mine detection advanced radar concept), which features an ultrawideband radar-sensing technology called iRadar and tomographic algorithms that provide three-dimensional subsurface images. LANDMARC is deployed on the remotely operated Hystar aerial platform, thereby reducing the time and cost of demining while significantly improving the safety of personnel and equipment.
Land Mines Are Long-Lived
An estimated 100,000 mines are removed each year. At that rate, clearing 40 to 50 million mines would require 450 to 500 years, assuming no new mines are laid. However, the pace of mine removal is far slower than the rate at which new mines are being placed.
According to Paulson, current demining methods are decades old and are extremely tedious because metal detectors cannot discriminate metallic mines from innocuous metallic clutter. Some antipersonnel mines are mostly plastic except for small metal parts. Detecting these metal parts requires the metal detector’s sensitivity to be turned up. As a result, most “mines” turn out to be harmless objects such as bottle caps, bullet casings, nails, or tin cans. Demining teams typically uncover 100 to 1,000 innocuous metal objects for each mine found.
Two Technologies Combine
Livermore’s LANDMARC technology consists of an array of lightweight, ground-penetrating iRadar sensors and a signal-processing “engine” that detects and maps land mines in three dimensions. (See the figure above.) In this way, pipes can be distinguished from rebar, rebar from land mines, and land mines from clutter in general.
The land mine locator combines LANDMARC with the revolutionary Hystar helium-filled aerial platform, which can cruise at 72 kilometers per hour. The platform can also rotate 360 degrees while hovering or in directional flight. The 12-meter-diameter unit uses a reversible fan propeller at its center to ascend and descend, and jet engine propellers on its rim to move forward, backward, or sideways and to spin in place.
Hystar’s telescoping mast lowers a sensor bar on which individual iRadar units are secured. The sensor bar typically hovers between 1 and 2 meters above the ground. An onboard central control unit handles power, sensor coordination, and data acquisition.
Operators on the ground in a mobile base-station vehicle wirelessly control the land mine locator. The raw data collected from the iRadar array are entered into a Livermore software application developed specifically to help detect and precisely locate land mines during demining operations.
Technology Soars over Alternatives
With the land mine locator in use, the world will at last have
a safer method to detect mines. As a result, nations will be able
to confidently reclaim millions of square kilometers from this
long-lasting scourge of war.
Key Words: demining, Hystar, iRadar, LANDMARC, land mine locator, R&D 100 Award, ultrawideband radar.
For further information contact Peter Haugen (925) 422-0749 (email@example.com).
Lawrence Livermore National Laboratory
Privacy & Legal Notice | UCRL-TR-52000-09-10/11 | October 2, 2009