There is an urgent need for new chemical application techniques and sprayers in Chinese orchard spraying.A new tractor-mounted automatic target detecting electrostatics,and air-assisted orchard sprayer was designed an...There is an urgent need for new chemical application techniques and sprayers in Chinese orchard spraying.A new tractor-mounted automatic target detecting electrostatics,and air-assisted orchard sprayer was designed and developed to meet the demand of chemical pest control in orchards.This sprayer light weighted,highly efficient,reduces pesticide use and is friendly to the environment.The techniques of automatic target detecting,electrostatics,and air-assisted spraying were combined in this system.The electrostatically charged droplets are projected toward the target by the assistance of an air stream that increases the droplets penetration within canopy.Experimental results show that the new automatic target detecting orchard sprayer with an infrared sensor can save more than 50%to 75%of pesticides,improve the utilization rate(over 55%),control efficiency,and significantly reduce environmental pollution caused by the pesticide application.At the same time the key technological problems related to air-assisted low volume and electrostatic spraying were solved.展开更多
Single-walled carbon nanotubes(SWNTs)have been introduced as compliant electrodes for dielectric elastomers(DEs)due to fault tolerance.To acquire a better electrostrictive strain and longer lifetime,it is essential to...Single-walled carbon nanotubes(SWNTs)have been introduced as compliant electrodes for dielectric elastomers(DEs)due to fault tolerance.To acquire a better electrostrictive strain and longer lifetime,it is essential to obtain a certain and uniform width of the SWNT electrode.To ensure uniform width manually,a small flux and longer time are necessary.Moreover,it is difficult to control the width of the electrode for the randomness of manual spraying.Therefore,a new type of automatic spraying process is presented in this paper.The width and homogeneity of the electrode can be easily controlled by certain parameters of the process.Two methods for detecting the homogeneity of the electrode are introduced in this paper:Measurement of surface resistance and luminosity.The coefficient of variation(CV)values detected by the two methods are virtually equal and less than 8%,which shows the feasibility of the detection method and homogeneity of automatic spraying.The speed of automatic spraying is 102 mm^(2)/s,which is higher than that of manual spraying.The spraying process and the method used to detect homogeneity in this paper provide a reference for the relevant processes.展开更多
文摘There is an urgent need for new chemical application techniques and sprayers in Chinese orchard spraying.A new tractor-mounted automatic target detecting electrostatics,and air-assisted orchard sprayer was designed and developed to meet the demand of chemical pest control in orchards.This sprayer light weighted,highly efficient,reduces pesticide use and is friendly to the environment.The techniques of automatic target detecting,electrostatics,and air-assisted spraying were combined in this system.The electrostatically charged droplets are projected toward the target by the assistance of an air stream that increases the droplets penetration within canopy.Experimental results show that the new automatic target detecting orchard sprayer with an infrared sensor can save more than 50%to 75%of pesticides,improve the utilization rate(over 55%),control efficiency,and significantly reduce environmental pollution caused by the pesticide application.At the same time the key technological problems related to air-assisted low volume and electrostatic spraying were solved.
文摘Single-walled carbon nanotubes(SWNTs)have been introduced as compliant electrodes for dielectric elastomers(DEs)due to fault tolerance.To acquire a better electrostrictive strain and longer lifetime,it is essential to obtain a certain and uniform width of the SWNT electrode.To ensure uniform width manually,a small flux and longer time are necessary.Moreover,it is difficult to control the width of the electrode for the randomness of manual spraying.Therefore,a new type of automatic spraying process is presented in this paper.The width and homogeneity of the electrode can be easily controlled by certain parameters of the process.Two methods for detecting the homogeneity of the electrode are introduced in this paper:Measurement of surface resistance and luminosity.The coefficient of variation(CV)values detected by the two methods are virtually equal and less than 8%,which shows the feasibility of the detection method and homogeneity of automatic spraying.The speed of automatic spraying is 102 mm^(2)/s,which is higher than that of manual spraying.The spraying process and the method used to detect homogeneity in this paper provide a reference for the relevant processes.
