| 摘要 |
<p>The invention concerns a method and a device for detection, classification and densimetric quantification of grain-eating insects, of one or several families of insects simultaneously present, in stocks of cereals and the like, which consists in detecting said insects through noises and sound and/or infrasonic vibrations emitted by the insects. It consists in carrying out the following operations: recording the real noises in said stock; eliminating known spurious noises; detecting on the resulting envelope energy curve windows corresponding to energy peaks and determining therefrom the mean frequency, the spectral width and the global energy; comparing the mean frequency and the width of each of said windows to that of windows with similar known and listed characteristics, so as to operate a taxonomic classification; finally, comparing the mean frequency and the global energy of each of said windows, to those of windows with known and listed characteristics, to operate a densimetric quantification.</p> |
