Abstract
A system for detecting the conditions of crop disease stress by acoustic emission technology was studied and developed .The PCI-2 acoustic emission board and R15 acoustic emission sensor probes were chosen to construct the hardware detecting system, and the AEWIN software and virtual instrument technology were utilized to construct the software system, a real-time acquisition and detecting system for the information between acoustic emission and disease stress of crop was established. The results show that there are a certain physiological cycle laws in the acoustic emission of healthy crop, generally the “double peak area” can appear; but distortion can occur in the acoustic emission of disease stressed crop, a sharp increase of the acoustic emission frequency can suddenly take place at some time, immediately the crop begins to show disease symptoms, and acoustic emission signals lose the regularity.
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