![]() ![]() With regard to the second aspect, the test bench allows for testing agricultural spray nozzles under ordinary work conditions in a 1:1 scale for water flux, pressure, nozzle speed, and distance from the target. Globally, the cost of the whole equipment was much lower than that of PDPA systems, though these systems allow for measuring drop velocity also. With respect to the first aspect, the cost of mechanical structure and hardware components was less than 5000 €, whereas the cost of the image acquisition system (a camera with a macro lens that can also be used independently for other applications) was about 1200 €. In addition, two main aspects were taken into consideration: the low cost of the whole equipment and test conditions similar to those present in standard commercial sprayers. The test bench, applied on a movable trolley, was designed and built at the Section of Mechanics and Mechanization of the Di3A (University of Catania, Catania, Italy) based on the ISO 5682-1 standard, dealing with Equipment for crop protection–Spraying equipment–Test methods for sprayer nozzles. The results about spray quality agree with the factory information, and the whole system, even if some aspects still need improvements, has proven reliable. Some tests were carried out by using an Albuz ATR80 orange hollow cone nozzle at the working pressures of 0.3, 0.5, 1.0, and 1.5 MPa. #QDSLRDASHBOARD V3.5.7 FREE DOWNLOAD WINDOWS 10#Spray trials and tuning of the system parameters were managed by means of a purposely designed user interface running on a Windows 10 PC. #QDSLRDASHBOARD V3.5.7 FREE DOWNLOAD SOFTWARE#The drops were captured with three Petri dishes containing silicone oil, photographed by means of a digital single-lens reflex (DSLR) camera, and then analyzed with the ImageJ software in order to measure the usual spray parameters: the volumetric diameters, the Sauter mean diameter, and the number mean diameter. It has a couple of 3 m long rails, along which the nozzle under test moves while spraying, controlled by a closed-loop position and speed controller. ![]() The design of the equipment was mainly based on the ISO 5682-1 standard. This study describes a low-cost laboratory test bench able to analyze agricultural spray nozzles under realistic conditions. Droplet size distribution is probably the most important feature of a spray as it affects all aspects of a phytosanitary treatment, i.e., biological, environmental, and safety aspects. ![]()
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