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Method and device for detecting objects dispersed in an area of land by determining propagation characteristics of an acoustic wave in the ground
Method and device for detecting objects dispersed in an area of land by determining propagation characteristics of an acoustic wave in the ground
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机译:通过确定声波在地面中的传播特性来检测散布在陆地区域中的物体的方法和装置
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摘要
A process and a device for detecting objects, in particular mines, dispersed in an area of land, or for determining propagation characteristics of an acoustic wave in the ground of an area of land. This process employs a plurality of acoustic transducers and reference targets distributed along borders of the area. After determining an optimal working frequency, a cartography of the propagation characteristics in the ground of the area of land is made, for example, by carrying out several temporal reversals, one after the other, of the signals received by the transducers so as to focus detection on the different reference targets. Objects are detected with the aid of this cartography by focusing detection by temporal reversal on an object and by searching for at least two transducers which have the lowest propagation time for the signal.
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