Constructive interference of acoustic waves for the purpose of land mine removal/location.
Original Publication Date: 2001-May-01
Included in the Prior Art Database: 2003-Jun-19
Disclosed is a process for the location/removal of land mines. The current cost placed on the removal of land mines is placed at $1000. per mine. This process would utilize modified Geophysical equipment to locate and possible detonate land mines. The Geophysical industry uses large acoustic sources while looking for oil. On land this source takes the form of a truck known as a vibrator. Groups of Vibrators linked by radio, sweep through low frequency ranges while keeping the phases between trucks locked. The disclosure would use a process to control the radio links between trucks to generate constructive interference between waves of two or more trucks. The process would begin by sampling the local weathering layer to determine it's resonate frequency. The trucks would then set up a fixed distance apart, and begin vibrating at frequencies slightly above and below the resonate frequency. the closer the frequencies are to each other the greater the distance to the point of constructive interference. The point or points (there will be one on each side of the trucks.) can be steered around by changing the phase and frequency separation of the two sources. The interference point at the resonate frequency will cause the soil in the weathering layer to oscillate, ether detonating the mines or moving them to the surface for easy location. Current methods of mine removal involve personnel finding and detonating or defusing the mines. Other methods use aerial explosives. The value of most farmland in third world countries does not justify the danger and expense of clearing such land. This method would allow the clearing of mines from field size tracks (10,000 M^2) in several hours. What is the value of changing land from an unusable category to an useable category?