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RISS 인기검색어
- 검색키워드
- 주제어 : Boom height (검색결과 3 건)
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Development of Boom Height Measurement Module with PSD Sensor
( Atsuru Fujimoto ),( Tadatoshi Satow ),( Tetsuya Makino ),( Kunihiro Funabiki ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
As the scale of farming continues to expand, the boom length and tank capacity of sprayers have increased. Because both ends of a long boom are subject to violent upward and downward movement with even slight rolling of the tractor, chemical spraying tends to be irregular. Even an experienced operator must pay close attention when adjusting the boom height manually. Although boom height is typically measured using an ultrasonic sensor, we present a system that controls the boom height using optical position sensors that are available at a much lower price than the commonly used ultrasonic sensors. In this paper, we report that the developed boom height measurement module and data collection system can be used to control the boom height. Because a position-sensitive detector (PSD) irradiates a target with an LED spot size smaller than the measurement range of ultrasonic waves, we assumed that the spotlight would, at times, pass through the top of a crop and measure the leaves and ground instead. For this reason, we designed the module with three PSD sensors improved for outdoor use by attaching infrared transmission filters. The measurements were performed in two fields to obtain data under different conditions; one field contained unharvested potato and the other contained germinated wheat. We tested two simple algorithms to calculate the appropriate boom height from the measured data; the Minimum-mode for the potato and Median-mode for the wheat. The analysis showed that the PSD module measured a height similar to that by the ultrasonic sensor by changing the algorithm according to the state of the stems and leaves.
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( Sazzadul Kabir ),( Ashrafuzzamn Gulandaz ),( Nasim Reza ),( Mohammod Ali ),( Shaha Nur Kabir ),( Sun-ok Chung ) 한국농업기계학회 2023 한국농업기계학회 학술발표논문집 Vol.28 No.1
Excessive use of pesticide increase production costs and negatively impact on the environment. Increasing spraying effectiveness is one of the major goals of precision variable rate technologies. The technical performance of the nozzle significantly impacts sprayer performance and quality. Analysis of the effects of operating pressure and boom height on spray dispersal and uniformity was the goal of this research. The test bench consisted of four nozzles (NN D-35) and a single-cylinder motor with a four-stroke capacity of 0.72 kW. This self-propelled sprayer was tasted on the ground with 2 km/h speed. Experiments were conducted both in lab and field condition with conventional spray nozzles and water as the test liquid. Tested liquid outflow pressure ranged from 280 to 520 kPa. Depending on the spraying target surface, 35, 45, and 55 cm of working spray boom height were adjusted. The nozzle spacing was 30 cm and the spray angle of the nozzles was 110o. Resultant sprayer nozzle widths with boom heights of 35, 45, and 55 cm caused overlaps of 22.38%, 23.43%, and 24.15% under the lab condition and 24.11%, 26.32%, and 29.37% under field condition. Under the laboratory condition average droplet density levels of 155.38, 159.20, and 168.31 (spots/cm2) were achieved at boom heights of 35, 45, and 55 cm with a speed of 2 km/h, resulting in the spray coverage levels of 23.21%, 26.38%, and 28.35%, respectively. At boom heights of 35, 45, and 55 cm at a speed of 2 km/h, average droplet densities of 138.62, 151.22, and 171.91 (spots/cm2) were obtained under the field yielding spray coverage levels of 24.11%, 26.38%, and 29.37%, correspondingly. Under the both conditions, the 55 cm boom overlapped less than 30%, and the average droplet density and spray coverage in unit area were better than the other two boom heights. It would also be economical and environmentally friendly to use these spraying tools.
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카비르사자둘 ( Sazzadul Kabir ),구란다즈아스라푸자만 ( Ashrafuzzaman Gulandaz ),레자나심 ( Nasim Reza ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2
The overuse of pesticides has caused increased production costs and environmental pollution. A major focus of precision variable rate technologies has been improving spraying effectiveness. Sprayer performance and quality are significantly impacted by technical performance of the nozzle. The objective of this work was to analyze the impact of boom height and operating pressure on spray distribution and uniformity. The test bench consisted of four nozzles (NN D-35) and a single-cylinder motor with a four-stroke capacity of 0.72 kW. This sprayer was self-propelled and operated with applied speeds of 2 km/h on testing grounds. Experiments were conducted in the lab with conventional spray nozzles and water as the test liquid. Tested liquid outflow pressure ranged from 280 to 520 kPa. Depending on the spraying target surface, 35, 45, and 55 cm of working spray boom height were adjusted. The nozzle spacing was 30 cm, and the spray angles of the nozzles were 110o. Resultant sprayer nozzle width with boom heights of 35, 45, and 55 cm caused overlaps of 22.38%, 23.43%, and 24.15%. The average droplet density levels of 155.38, 159.20, and 168.31 (spots/cm2) were achieved at boom heights 35, 45, and 55 cm with a speed of 2 km/h, resulting in the spray coverage levels of 23.21%, 26.38%, and 28.35%, respectively. This study may assist in designing future sprayers and spray booms. Additionally these spraying devices would also be cost-effective and environmentally friendly to utilize.
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