New laser device to detect anti-personnel mines can also be used on vehicles

A new antipersonnel mine detector will be presented at the Laser Congress of the Optical Society held in Vienna. This detector could solve the problem of efficiency with regard to the detection of anti-personnel mines in the ground in moving vehicles.

Usually, vehicles are used to speed up the detection of mines, but this also lowers the level of accuracy. In a vehicle, even the best detectors are disturbed by sound or vibration from external sources. The Laser Doppler vibrometers (LDV), a very sensitive and promising new technology for the detection of anti-personnel mines and other buried objects, also suffer from this disturbance.

A group of researchers from the University of Mississippi has therefore built a new detector that, according to the press release, effectively detects buried objects even when the same detector is the movement and therefore also when it is on a vehicle.

The new device, called Laser Interferometric Differential Laser Sensor (LAMBDIS), provides the same accuracy as the LDV system while being much less sensitive to motion.

“Our new device overcomes this challenge by using a series of laser beams and then combining their signals to create a pattern of rapid detection that is also robust enough to compensate for movement and other ‘noises’ that could overwhelm other techniques. LAMBDIS provides a measurement of vibration fields with a high sensitivity, while having a low sensitivity to the entire movement of the body of the object or the sensor itself, allowing operation from a moving vehicle,” says Vyacheslav Aranchuk, project leader researcher.

The new device used detects doppler displacement using the interference of light reflected from different points on the object, as Aranchuk himself explains.