• Title, Summary, Keyword: Sprayer

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Ergonomic and Performance Analyses of a Pull-type Prayer for Floriculture in Greenhouse (시설화훼용 견인형 방제기의 작업자세 및 성능 분석)

  • Lee, Seung-Ki;Kim, Woong
    • Journal of Biosystems Engineering
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    • v.35 no.6
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    • pp.426-433
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    • 2010
  • This study was conducted to develop a pull-type sprayer which performs the safe spraying with improved ergonomic postures while pesticide spraying of roses in floricultural facilities. The performance of the ergonomically designed sprayer was analyzed with a comparison of a conventional spray method. The pull-type sprayer, consisting of power pump, hose and nozzle parts was designed to manually pull and spray to upward and horizontal directions. From the analysis of postures with the RULA method, the labor load to arm and wrist using the pull-type sprayer was less than that with conventional power sprayer, so that the intensity of labor reduces. Working capacity with pull-type sprayer was two-fold greater than the conventional power sprayer. After performing pesticide spraying with the pull-type sprayer, the operating cost was reduced to \585,000/yr, which is 79% less than that of cost (\2,197,500/yr) for using conventional power sprayer.

A Experimental Study on Coverage Characteristic of a Self-Propelled Boom Sprayer for Paddy Field (수도작용 붐 방제기의 피복특성에 관한 실험적 연구)

  • 정창주;이강걸;이중용;조성인;최영수;최중섭
    • Journal of Biosystems Engineering
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    • v.22 no.2
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    • pp.137-150
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    • 1997
  • To investigate the feasibility of a boom sprayer in the paddy field, an experimental boom sprayer for both broadcast and directed spraying to the lower part of rice plants was developed. The droplet deposition characteristics of the boom sprayers were experimentally compared to those of power sprayer. Water sensitive papers(WSP) and a machine vision system were used to evaluate the coverage rate and droplet density. It was shown that the broadcast application by the boom sprayer was the best coverage among the tested sprayers. Coverage tate and droplet density were affected by the distance between nozzles and the sprayer ground speed, The best result was obtained when the distance of 30cm and the speed of 1.7km/hr. The directed application showed inconsistency in overall droplet distribution. The inconsistency was judged to be caused by conflict between plants and boom extenders. The power sprayer showed a very wide range of droplet size distribution, relatively larger droplets and inconsistency in cove The power sprayer was judged to be inadequate for the low-volume precision application because of inconsistency in performance and difficulty in adjusting the spraying rate. Based on the droplet coverage characteristics, it was concluded that the self-propelled boom sprayer for the broadcast application was feasible for an alternative to the power sprayer in case of low volume, precision application in paddy condition.

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Development of a Control System for Uniform Application Rate on a Self-Propelled Boom Sprayer (붐방제기의 균일량 살포를 위한 제어시스템 개발)

  • 조성인;정창주;이동훈;이중용
    • Journal of Biosystems Engineering
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    • v.21 no.4
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    • pp.406-413
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    • 1996
  • A control system for a self-propelled boom sprayer to spray at uniform application rate was developed and evaluated. The ground speed of the sprayer was converted into voltage. The voltage was used as an input signal. Output signal was current of a servo motor, that controlled application pressure of the sprayer with a feedback control system. Spraying was executed at the pressure of 20~55 psi and the speed of 0.640~0.696 km/hr and 1.040-1.131 km/hr. Although the pressure and the speed of sprayer were changed continuously, application rate was tried to keep a nearly constant amount of 666.67 L/ha. This result showed that the developed control system for uniform application rate was adoptable for the self-propelled sprayer.

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Intelligent Sprayer System using Tree Recognition (과수 인식을 이용한 지능형 방제기 시스템 개발)

  • Hong, Hyung Gil;Woo, Seong Yong;Song, Su Hwan;Oh, Jang Seok;Yun, Haeyong;Seo, Kab Ho;Kwon, Soon Wook;Lee, Ki Yong;Lee, Jang Chang;Cho, Hee Keun
    • The Journal of Korea Robotics Society
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    • v.15 no.2
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    • pp.115-123
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    • 2020
  • Farmers using conventional sprayer system are exposed to pesticide poisoning and soil pollution due to pesticide application. In order to reduce this problem, the effective sprayer system is required. In this paper, we propose development of intelligent sprayer system using tree recognition. This intelligent sprayer system consists of an image recognition module, a remote control, a sprayer system, an air blower, and a control module. It is possible to spray pesticides automatically and manually through remote control using cameras and controls. We conducted a total of four experiments in tree recognition experiment, test of attachment and water sensitive papers, measurement of pesticide consumption, and measurement of worker exposure. The test results showed that the consumption of pesticides could be reduced while giving the same effect as conventional controls.

EXPERIMENTAL STUDIES ON SOME VIBRATION ISOLATIORS DEVELOPED FOR POWERED KNAPSACK SPRAYER

  • Sahota, M.S.;Bansal, A.S.
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • pp.246-255
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    • 1993
  • The paper presents the experimental studies on the effectiveness of some vibration isolators developed for reducing transmission of vibration from the powered knapsack sprayer to the back and shoulders of the operator. A test rig was used to conduct detailed experimental studies on the powered knapsack sprayer mounted on it and fitted with different vibration isolators. Structural features of vibration isolators have been presented and their effectiveness of isolating transmission of vibration, from the engine-blower of the sprayer to its main frame and the operator, has been presented and discussed. Vibration measurements and analyses made by using B & K equipment have proved that the vibration isolators are quite effective in reducing the vibration transmission. The operators felt much less discomfort when they used the sprayer fitted with the isolators developed for the purposes, as compared to the existing arrangement.

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Autonomous guidance Using Ultrasonic Sensors for a Small Orchard Sprayer

  • Shin, Beom-Soo;Kim, Sang-Hun;Koo, Young-Mo
    • Agricultural and Biosystems Engineering
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    • v.2 no.2
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    • pp.50-58
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    • 2001
  • Chemical application is very hazardous in confined spaces under the canopy ceiling in Korean vineyard. For a small orchard sprayer adaptable to such a working condition, a low-cost autonomous steering control system was developed using two ultrasonic sensors, two electrically-operated cylinders and 80196kc microprocessor. A distance ranging system timed the round-trip for each ultrasonic wave to travel against parallel targets, placed every 1.5m spacing along both sides of a desired path. A steering control algorithm of the autonomous operation began with ranging left and right targets and the heading was decided using difference between the distances. Electrically-operated cylinders actuated steering clutches to guide the sprayer. Evaluation tests showed that the orchard sprayer could travel within RMS value of 5cm along the desired path. Ground speed did not affect the performance of the autonomous guidance system at the speed ranges of 0.29~0.52m/sec.

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Spraying Status Evaluation of the Electro-static Sprayer Using Computer Image Processing (컴퓨터 영상처리를 이용한 정전분무기의 분무상태 평가)

  • Hwang, H.;Cho, S. I.;Cho, D. Y.
    • Journal of Biosystems Engineering
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    • v.24 no.5
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    • pp.391-398
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    • 1999
  • The spraying status of the electrostatic sprayer was evaluated by processing surface spraying images of the natural leaves. Water solution of the fluorescent material was used as a spray medium. The image of the lights reflected by fluorescent droplets was captured under UV light using a color CCD camera. Coverage rate, particle density, and the size distribution of particles were analyzed from the surface images of leaves under various spraying conditions such as spraying nozzle angle and object distance. Spraying characteristics of the electrostatic sprayer was evaluated in comparison with the conventional one. In a case of electrostatic sprayer, coverage rate and particle density increased by the average of 1.57times and 1.01times respectively under various nozzle angles and distances. The number of particle under the diameter of 50 ${\mu}{\textrm}{m}$ also increased significantly.

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Development of a Flow Compensating Boom Sprayer for the Speed Variation (주행속도 보상형 붐방제기의 개발)

  • 구영모;정재은
    • Journal of Biosystems Engineering
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    • v.23 no.3
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    • pp.211-218
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    • 1998
  • A variable flow-controlled boom sprayer was developed and evaluated. Field tests were conducted to evaluate the adoptability of the sprayerr with optimal conditions. Negative response time was obtained from the field test because pump and PTO were interlocked with the speed of sprayer. Another reason for the negative value was due to the definition of the response time. With constant on-time control, the system was unstable at the conditions of small tolerance and long control interval. The performances of the spray system were stable and accurate. The stable and synchronous responses were achieved with a variable on-time control. The flow control system with an optimal condition (1.0 sec of control interval, 2 of damping ratio, 1% of tolerance) provided the proper performance for uniform spraying. A standard operating procedure of the flow compensating boom sprayer for the ground speed variation was presented and recommended.

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Ultrasonic Sensor Controlled Sprayer for Variable Rate Liner Applications (초음파센서를 이용한 변량제어 스프레이어)

  • Jeon, Hong-Young;Zhu, Heping
    • Journal of Biosystems Engineering
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    • v.36 no.1
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    • pp.15-22
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    • 2011
  • An experimental variable rate nursery sprayer was developed to adjust application rates for canopy volume in real time. The sprayer consisted of two vertical booms integrated with ultrasonic sensors, and variable rate nozzles coupled with pulse width modulation (PMW) based solenoid valves. A custom-designed microcontroller instructed the sensors to detect canopy size and occurrence and then controlled nozzles to achieve variable application rates. A spray delivery system, which consisted of diaphragm pump, pressure regulator and 4-cycle gasoline engine, offered the spray discharge function. Spray delay time, time adjustment in spray trigger for the leading distance of the sensor, was measured with a high-speed camera, and it was from 50 to 140 ms earlier than the desired time (398 ms) at 3.2 km/h under indoor conditions. Consequently, the sprayer triggered 4.5 to 12.5 cm prior to detected targets. Duty cycles of the sprayer were from 20 to 34 ms for senor-to-canopy (STC) distance from 0.30 to 0.76 m. Outdoor test confirmed that the nozzles were triggered from 290 to 380 ms after detecting tree canopy at 3.2 km/h. The spray rate of the new sprayer was 58.4 to 85.2% of the constant application rate (935 L/ha). Spray coverage was collected at four areas of evergreen canopy by water sensitive papers (WSP), and ranged from 1.9 to 41.1% and 1.8 to 34.7% for variable and constant rate applications, respectively. One WSP area had significant (P < 0.05) difference in mean spray coverage between two application conditions.

Development of a Self-Travelling Sprayer for a Greenhouse (I) - Self-travelling - (시설원예용 파이프 유도식 무인방제기 개발 (I) - 무인 주행시스템 -)

  • 김태한;장익주;강춘태
    • Journal of Biosystems Engineering
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    • v.24 no.3
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    • pp.209-216
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    • 1999
  • A self-travelling sprayer was developed to avoid the exposure of an operator to agricultural chemicals and exhaust gas, to improve safety and to increase working efficiency during the application and transport work in the greenhouses. This system consists of self-travelling system and the control system for application and safety device. The auto-spray car is equipped with a liquid chemical tank of 80l capacity. The travelling system adopted mechanical steering system which link mechanism of front wheel is guided by guide rollers. The sprayer travels along the guiding pipe which is set on the furrow in the greenhouses. The sprayer stops automatically applying and traveling when the liquid chemical tank becomes empty or when the sprayer reach the turning point. The spray booms swings in a vertical plane. The control system of safety devices controls the automatic stop of the sprayer when there is an obstacle on the traveling path, or when the battery becomes discharged. The auto-spray car traveled smoothly and steadily along the guide pipe during traveling straightly and turning on the ground.

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