Direct Injection Sprayer

This chapter describes past and present direct injection systems (DIS). The systems are structured into central (CDIS), boom section (BDIS) and nozzle injection systems (NDIS). A major motivation to develop DIS is to extend the flexibility of applying different pesticides, to advance precision of application , and to enhance the operator comfort and safety. The ultimate goal is to develop a system that works together real-time with detection systems and only treats infested areas. As the injection of pesticides near to the nozzle would be most acceptable technology, further optimisation is required. Based on a response time analysis, a control algorithm is proposed for quicker response of the injection system and new injection valve covering the full range of treatment rates is described. Results of the mixing process are presented as well as the effect of using different supply devices i.e. gear and diaphragm pumps, and air tanks for pesticide injection. In addition, switching of carrier in a DIS to save water and enlarge the capacity of sprayer is discussed along with the aspect of operator safety and tubing system rinsing.

[1]  P. D. Ayers,et al.  A Variable Rate, Direct Nozzle Injection Field Sprayer , 1996 .

[2]  E. L. Paul,et al.  Handbook of Industrial Mixing , 2003 .

[3]  Markus Sökefeld,et al.  Direkteinspeisung von Pflanzenschutzmitteln , 2005 .

[4]  H. T. Søgaard,et al.  Real-time Application of Herbicides in Seed Lines by Computer Vision and Micro-Spray System , 2006 .

[5]  R. C. Derksen,et al.  MIXTURE UNIFORMITY IN SUPPLY LINES AND SPRAY PATTERNS OF A LABORATORY INJECTION SPRAYER , 1998 .

[6]  E. L. Paul,et al.  Handbook of Industrial Mixing: Science and Practice , 2003 .

[7]  David C. Slaughter,et al.  DIRECT NOZZLE INJECTION OF PESTICIDE CONCENTRATE INTO CONTINUOUS FLOW FOR INTERMITTENT SPRAY APPLICATIONS , 2006 .

[8]  J. T. Walker,et al.  Development and characterization of variable orifice nozzles for spraying agro-chemicals , 1999 .

[9]  Universitäts und Landesbibliothek Bonn,et al.  Study on the Response Time of Direct Injection Systems for Variable Rate Application of Herbicides , 2008 .

[10]  Robert Costanza,et al.  Nature: ecosystems without commodifying them , 2006, Nature.

[11]  Peter Schulze Lammers,et al.  Optimization of Direct Nozzle Injection System for Site-Specific Herbicide Application , 2007 .

[12]  Jiri Vondricka,et al.  Evaluation of a carrier control valve for a direct nozzle injection system. , 2009 .

[13]  Jan Miernowski Le plaisir tragique de la haine Rodogune de Corneille , 2003 .

[14]  P.C.H. Miller,et al.  The use of a high speed photographic technique to examine the response time characteristics of a solenoid spray valve , 1980 .