Crop disease on-condition control simulation model system based on crop acoustic emission mechanism

Abstract

The invention relates to a crop disease on-condition control simulation model system based on crop acoustic emission mechanism, wherein an acoustic emission sensor is arranged on the stalk of a crop plant, the acoustic emission sensor uses an acoustic emission capture card to input the collected data in a computer through a PCI interface; the computer performs statistical analysis to the crop disease stress acoustic emission signals, builds a mathematical model of acoustic emission signals, extracts the crop disease stress acoustic emission source as point source, performs frequency-domain analysis and uses two paths of acoustic emission sensors to perform identification and positioning to the sound source according to the acoustic emission signals in the stalk transmission attenuation process; and a temperature-humidity sensor, a light sensor and the like are connected with the computer through a wireless sensor network, and a relay controlling a water container and an electromagnetic valve are used to irrigate the crop plant through a pipeline. The invention provides the mathematical model of acoustic emission signals; time-frequency analysis is adopted to provide the time-frequency feature of crop disease stress acoustic emission signals, and the wavelet technology is used to extract ultrasonic frequency signals.

Description

technical field [0001] The invention belongs to the field of agricultural biotechnology, in particular to a crop disease control simulation model system based on crop acoustic emission mechanism. Background technique [0002] Under natural conditions, due to various reasons such as different geographical locations, climatic conditions, and human activities, various adverse environments for plants have been caused, which have exceeded the range that plants can tolerate for normal growth and development, resulting in plant damage or even death. , These environments that cause damage to plants are called stress or stress. Plants are often subjected to a variety of environmental stresses during their growth, including abnormal temperature, lack of water, unfavorable soil chemical and physical conditions, etc. However, the reduction of plant growth and crop yield caused by disease stress is becoming more and more serious, which has attracted widespread attention of scholars at h...

AI Technical Summary

Problems solved by technology

Theoretically, the waveform analysis method can provide more information than the parameter analysis, but due to the fast attenuation speed and serious waveform distortion of the ultrasonic signal in the plant xylem, multiple reflections and refractions occur in the propagation medium before reaching the sensor. , resulting in huge errors in the recovery, reconstruction, and analysis of the phase, amplitude, and frequency of the signal source, so the parameter analysis method is often used in the actual detection system

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