Land mine detector
First Claim
1. A forwarding looking ground penetrating mine detection apparatus, comprising:
- a radiation source for irradiating a sample of ground suspected of containing at least one mine with a plurality of frequency swept ground penetrating radar signals, and a detector for receiving target signals backscattered from said ground responsive to said radar signal, said detector including a time-frequency analyzer, said time-frequency analyzer transforming said target signals into a time-frequency image representation (TFR).
2 Assignments
0 Petitions
Accused Products
Abstract
A forwarding looking ground penetrating mine detection apparatus includes a radiation source for irradiating a sample of ground suspected of containing at least one mine with a plurality of frequency swept ground penetrating radar signals. A detector receives target signals backscattered from the ground responsive to the radar signal. The detector includes a time-frequency analyzer which transforms the target signals into a time-frequency image representation (TFR). In a preferred embodiment, the detector can include a wavelet packet transformer (WPT) for extracting time-frequency localized information from the TFR in the form of feature set constructed from a wavelet table. The apparatus can also include a data dimensionality reducer for selecting features to form a feature subset from the feature set, preferably based on reference to a training data set. A multilayer neural network classifier can be based on the feature subset, and be adaptable to the surrounding environment through learning.
46 Citations
20 Claims
-
1. A forwarding looking ground penetrating mine detection apparatus, comprising:
-
a radiation source for irradiating a sample of ground suspected of containing at least one mine with a plurality of frequency swept ground penetrating radar signals, and a detector for receiving target signals backscattered from said ground responsive to said radar signal, said detector including a time-frequency analyzer, said time-frequency analyzer transforming said target signals into a time-frequency image representation (TFR). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A mine detection method, comprising the steps of:
-
receiving a signal backscattered from a ground penetrating swept radar radiated ground sample;
generating a time-frequency representation based on said backscattered signal, and analyzing said time-frequency representation to indicate whether a mine is in said ground. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
Specification