Development and Preliminary Prototype Testing of an Agricultural Nozzle Clog Detection Device

Abstract. Agricultural nozzles are the main component that performs the spraying of agrochemicals and their proper functionality is a key element for an even spray application on crops. Since nozzles have small orifices, they tend to become clogged sometimes when there is debris from the agrochemical in the tank. Nozzle clogging during spray application will result in poor weed management, for instance, and increased cost in re-spraying the particular row of crop. Some measures used to prevent nozzles from clogging are using screens or strainers to filter debris from getting to the nozzle tip and performing regular checks on the nozzles. However, nozzle clogging still occurs during spraying despite the precautions taken. Thus, a device that can detect nozzle clogging during the spraying operation is necessary to enable a quicker response that will ensure even application across each row of the crops. A novel method and device for detecting clogged nozzles (patent pending) that is externally attachable to each nozzle on the boom of a sprayer has been developed in the Precision Application Technology Lab at Arkansas State University. The main objective of this study is to present a general description of this prototype nozzle clog detection device and nozzle clog detection system. Meanwhile, spray quality test on spray pattern and droplet size was conducted under controlled conditions with and without using the device. This was to determine whether there is significant difference in spray pattern and droplet size between using and not using the device. The results of these experiments will facilitate further improvement of this device.