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Summary form only given. A system for detecting the conditions of crop disease stress by acoustic emission technology was studied and developed, and the contrast experiment study was carried out in a greenhouse by taking a healthy tomato and a disease stressed tomato crop as the objects. The PCI-2 acoustic emission board and R15 acoustic emission sensor probes were chosen to construct the hardware...
The automatic and real time irrigation system based on detecting of water shortage information in crops with acoustic emission (AE) technology was studied and developed, an experimental study in greenhouse with the crop of tomato as the target was carried out. PCI-2 AE board-card, R15 sensor, electronic balance, temperature sensor, humidity sensor, CO2 sensor, illumination sensor and PCI-8333 DAQ...
A microcomputer-based system of continuously measures water stress in crop in a non-destructive testing method was developed. Produced by cohesion between water molecules or adhesion to the conduit wall, the crop xylem cavitation was accompanied by the vessel walls vibration which is the indicator of the water stress. The physics of ultrasonic acoustic emissions (AEs) were used to measure the crop...
Surface temperature has significant impact on the microwave brightness temperature measurements. In this study, we evaluate the surface temperature effects on soil moisture estimation. Two soil moisture inversion methods for bare surface based on surface microwave emission model-advanced integral equation model (AIEM) were developed. A parameterized model-Qp model was used to cancel out the roughness...
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