Spray Pattern Monitoring - With Every Droplet in Focus

In Florida, clustered pellitory is becoming a troublesome weed for citrus, especially from the winter through early summer. Inadequate management of this weed can result in its heavy infestation in tree rows and can interrupt the spray pattern of low-volume drip irrigation systems. This new 3-page publication of the UF/IFAS Horticultural Sciences Department will assist Florida citrus growers with proper identification of clustered pellitory and with adoption of adequate and timely strategies to manage this weed in their groves. Written by Ramdas Kanissery, Biwek Gairhe, Brent Sellers, and Steve Futch. https://edis.ifas.ufl.edu/hs1341

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Evaluation of spray pattern uniformity using three unique analyses as impacted by nozzle, pressure, and pulse‐width modulation duty cycle

Pest Management Science ◽

10.1002/ps.5352 ◽

2019 ◽

Vol 75 (7) ◽

pp. 1875-1886 ◽

Cited By ~ 6

Author(s):

Thomas R Butts ◽

Joe D Luck ◽

Bradley K Fritz ◽

W Clint Hoffmann ◽

Greg R Kruger

Keyword(s):

Duty Cycle ◽

Pulse Width ◽

Pulse Width Modulation ◽

Spray Pattern ◽

Nozzle Pressure

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Application of a Viscous Liquid as an Aerosol for Post-Operative Adhesion Prevention: First Engineering Steps Towards Nozzle Design

2021 Design of Medical Devices Conference ◽

10.1115/dmd2021-1064 ◽

2020 ◽

Author(s):

P. Alex Smith ◽

Timothy J. Keane ◽

Stefano Serpelloni ◽

Stephen G. Ramon ◽

Francesca Taraballi

Keyword(s):

Thin Film ◽

Minimally Invasive ◽

Viscous Liquid ◽

Scar Tissue ◽

Adhesion Prevention ◽

Nozzle Design ◽

Postoperative Adhesions ◽

Internal Organs ◽

Spray Pattern ◽

3D Printed

Abstract Postoperative adhesions are scar tissue that form between internal organs after surgery, leading to devastating life-long complications. Current adhesion barriers used clinically are solid sheets which can only be applied in open surgeries through large incisions. We have developed a material which can be applied as a liquid in minimally invasive surgeries which transitions into a solid thin film barrier upon contact with warm tissue. However, to be effective, it must be sprayed, and spraying a viscous liquid consistently is challenging. We proposed using a gas dispersant to facilitate aerosolization. In this study, we compared a commercially available nozzle without gas dispersant to a custom 3D printed nozzle with gas dispersant. For comparison, we measured both spray pattern and stiffness of the resulting gel. We found that when sprayed with gas dispersant, the spray pattern covered a larger area, and the resulting gel was stiffer than when sprayed without gas dispersant.

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Evaluation of Horizontal Patternators According to International Standard Requirements for Boom Sprayers

Transactions of the ASABE ◽

10.13031/trans.14086 ◽

2021 ◽

Vol 64 (5) ◽

pp. 1635-1646

Author(s):

Emilio Gil ◽

Mariana Bueno ◽

Javier Campos ◽

Montserrat Gallart ◽

Joao P. A. R. Da Cunha

Keyword(s):

Distribution Patterns ◽

Volume Distribution ◽

List Type ◽

Operating Pressure ◽

Spray Pattern ◽

Iso Standard ◽

Iso Standards ◽

Technical Requirements ◽

Spray Distribution ◽

Technical Specifications

HighlightsHorizontal distribution according ISO Standard 16119 is a measurement procedure to evaluate boom sprayers.ISO Standards 5682-1 and 5682-2 establish technical requirements for horizontal patternators.In this study, three types of patternators were evaluated to test their capability to meet the standards.The evaluated patternators showed similar results for spray distribution patterns.Minor deviations from ISO Standard 5682 did not imply differences according ISO Standard 16119.Abstract. Uniformity of spray volume distribution is one of the officially established measurements for the evaluation of horizontal boom sprayers according to ISO Standard 16119 and requirements established by ISO Standard 16122. Measurement of spray distribution patterns requires the use of specific devices such as horizontal patternators, which are included in the technical specifications for ISO Standards 5682-1 and 5682-2. Three such devices were tested, including two manual patternators (fixed and mobile) and one electronic patternator. According to information provided by the manufacturers, all three patternators align with ISO requirements. This study evaluated and compared the results obtained with the three patternators. Specifically, the horizontal distributions measured by the patternators were evaluated and compared using four nozzle types (XR 11003, AIXR 11003, TTJ60 11003, and AITTJ60 11003), three boom heights, and three operating pressures. Tests were conducted to quantify single-nozzle spray patterns, the coefficient of variation (CV) of the entire boom distribution, the liquid recovery capability of the three patternators, and the ability to simulate the entire boom spray distribution from a single-nozzle spray pattern. Results demonstrated correct functioning of all three patternators, resulting in identical conclusions considering the requirements established in the ISO standards. The CV values of the horizontal distributions were less than 10% for all cases. Moreover, the trends in values for all the evaluated factors (nozzle type, boom height, and operating pressure) were the same, independent of the patternator used. Keywords: ISO 16119, ISO 16122, ISO 5682, Liquid recovery, Nozzle spray pattern, Patternator, Spray boom, Transverse distribution, Uniformity.

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