【摘 要】
：
Short distance wireless communication technology is one of the most important technologies of wireless sensor network.At present, short distance wireless communication technology mainly includes Bluet
【机 构】
：
School of Mechanical Science and Engineering, Jilin University, Changchun, P.R.China
【出 处】
：
The Sixth Asian Conference on Precision Agriculture (第六届亚洲精准
论文部分内容阅读
Short distance wireless communication technology is one of the most important technologies of wireless sensor network.At present, short distance wireless communication technology mainly includes Bluetooth, wireless 802.15.4 (Wi-Fi), infrared data transmission (IrDA), ZigBee, etc.A kind of Radio Frequency (RF) communication technology provides a new path to wireless communication network.This technology adopts ISM frequency segment of internet general without a license, which has characters of low transmitting power and high receiving sensitivity.Its communication distance ranges from serial decameter to number hectometer.In this study, a wireless communication system was built based on an nRf905 transmission module to control leaf wetness sensor for monitoring real-time plant leaf wetness.Experiments were conducted in a corn field of experimental farm of USDA-ARS-APMRU in College Station, Texas.Transmitter-to-receiver distance was considered as an impact factor on wireless communication.A distance of 40m was defined as a stable communication distance for the nRF905 wireless transmission module in field applications.The wireless communication system introduced here offers real potential for reliably monitoring leaf wetness status in crops.The smart sensor array reliably recorded and transmitted the readings of the leaf wetness sensors.
其他文献
For South Downs, complex terrain features of small plots of farmland, This paper attempts to use hollow UAV explore new ways to sow with the appropriate parameters.The UAV body structure with 8 rotors
The quality of rice will greatly change as the time has passed by because the inner physical and chemical components are apt to be affected by the exterior environment parameters such as temperature,
Most existing image-based methods for crop disease diagnosis usually have high requirement of the input images, including simple background, sufficient depth of field, uniform illumination, etc.And be
Organophosphorus pesticide residue is a major threat for the food quality and safety, and the range is vast.Thus, the rapid detection of organophosphorus pesticide is of great importance.In the paper,
It is significantly important in practice, for both manual and GPS based autopilot operation of agricultural field machinery, to obtain optimal operation direction, route and scheduling strategies for
Adjusting the concentration of oxygen is a key factor in maintaining the quality of fresh products in transportation equipment with controlled atmosphere (CA).Liquid nitrogen injection was proved to b
In precision agriculture, near-ground radio-frequency signal isconsidered as the most promising medium to transfer agricultural information for its convenient wireless connectivity, especially in appl
Precision Index (PI) of machine/equipment is based on its capability to perform a given task in an accurate manner.It is a worthwhile attribute to compare the performance of different equipment and op
Different parts of leaves have different tissue structures and chlorophyll contents.Therefore, fluorescence characteristics in different parts of the same leaf have lateral heterogeneity,but using fib
It has great significance to study quick monitoring of rice flood disaster and applying timely remedial measures in the disaster area.LAI is a very important physiological parameter in crop growth cha