• Korean Journal of Agricultural Science
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• v.49 no.4
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• pp.677-696
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• 2022

Development of radish collectors may enhance radish production and promote upland crop mechanization in the Republic of Korea. Theoretical analysis of power is crucial to ensure the optimum design of agricultural machinery. The aim of the present study is to analyze theoretically the power requirement of a tractor-mounted radish collector under development and to propose design guidelines. The important components of the radish collector were belt-type conveyors, three hydraulic motors, and a direct current (DC) winch motor to operate the total radish collecting process. Theoretical equations were used to calculate the hydraulic motor's power, winch motor power, and draft power at loaded and unloaded conditions. A variety of tractors (44 - 74 kW) and different soil characteristics (hard, firm, tilted, and sandy) were considered to investigate the appropriate drawbar power. Variations of the power requirement of the tractor-mounted radish collector were observed due to modifications of the design parameters. The required hydraulic power of the stem cutting conveyor, stem cutting blade, and transfer conveyor of the radish collector were 0.23 and 0.24, 0.18 and 0.19, and 0.19 and 0.22 kW under unloaded and loaded conditions, respectively. The maximum draft power was calculated as 0.89, 1.07, 1.25, and 1.61 kW at a 30° tilted angle for hard, firm, tilted, and sandy soil, respectively. The calculation showed 2.07 kW DC power was required for unfolding or folding the stem-cutting conveyor. A maximum power of 4.78 kW was prescribed for conducting the whole process of the tractor-mounted radish collector. The analysis of power introduced in this study will be helpful to select the appropriate design parameters for the successful development of a tractor-mounted radish collector.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 1998.06a
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• pp.417-422
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• 1998

This paper presents a method of object classification from dynamic image based on fuzzy inference algorithm which is suitable for low speed such as, conveyor, uninhabited transportation. At first, by using feature parameters of moving object, fuzzy if - then rule that can be able to adapt the wide variety of surroundings is developed. Secondly, implication function for fuzzy inference are compared with respect the proposed algorithm. Simulation results are presented to testify the performance and applicability of the proposed system.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.11 no.5
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• pp.53-61
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• 1997

본 연구에서는 편측식 선형 유도전동기(SLIM)를 구동원으로 한 지상 2차 방식의 반송설비시스템을 실험장치로서 구성하고, 이에 적용된 SLIM의 해석 및 설계을 위하여 Goodness factor와 가동자의 주행패턴을 고려하였다. 또한, 반송설비시스템의 추진구동원에 적용된 SLIM의 설계에 대한 타당성을 고찰하고자 유한요소법(FEM)에 의한 해석결과와 실험결과를 비교·분석하였으며, 이로부터 반송설비시스템은 물론 산업용 제어기기에 이르기까지 SLIM의 응용을 위한 기초자료를 제시할 수 있었다.

• Proceedings of the Korea Multimedia Society Conference
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• 1998.10a
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• pp.338-343
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• 1998

본 논문에서는 클라이언트/서버 형태로 컨베이어 시스템을 원격으로 제어하는 방법을 제시하고 있다. 이러한 시스템의 구성은 근거리통신망으로 원격지에 연결된 컨베이어 시스템을 상황실에서 제어하는 형태를 가진다. 서버 시스템에서는 컨베이어 시스템을 통과하는 생산품 내역에 대한 데이터 베이스를 저장, 유지, 관리한다. 또한 컨베이어 시스템을 제어하는 프로그램을 수행시킨다. 컨베이어 시스템은 승용차 조립라인을 모델링한 시스템으로 구성되어 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.979-982
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• 2003

본 논문에서는 I/O 인터페이스 제어 보드와 ISA 인터페이스 제어 보드, 그리고 레고 기반의 프로토타입을 통해 실시간 신발 공정 컨베이어 제어를 위한 원격 감시 및 제어 시스템을 구현하였다. 컨베이어를 실시간으로 제어하기 위하여 작업의 우선권을 사용자가 정할 수 있는 RTLinux를 사용하였으며, RTLinux 기반으로 디바이스 드라이브를 작성하였다. Client/server분산환경의 웹을 기반으로 실시간 시스템의 구현 및 테스트를 통해 프로토타입의 작동을 확인한다.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.1273-1275
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• 1996

Moisture measurements of s intering materials were performed using the simulator which can simulate various conditions taking place at the belt-conveyor of sintering process. The moisture sensor used in this experiment is NIR moisture meter(JE-330, KETT Electric Lab.). Using the simulator, we measured the moisture contents of sintering materials at different conditions. We found that the moisture content decreased as the rotation speed increased and the size of the sintering materials became smaller.

• ICROS
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• v.2 no.3
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• pp.81-91
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• 1996

이 글에서는 Multi-Tasking Real Time O.S인 VxWorks를 기본으로 하여 다중센서 융합(Multi-Sensor Fusion) 능력을 갖는 다중 로봇 협조제어 시스템의 구현에 대하여 살펴보았다. 본 제어 시스템은 두대 로봇의 제어에 필요한 장애물 회피, 조건 동작(Conditional Motion) 혹은 동시동작(Concurrent Motion)과 외부 디바이스와의 동기 Motion(Conveyor Tracking)을 수행할 수 있게 구현하였고, 몇몇 작업을 통해 우수성을 입증하였다. 앞으로 본 연구와 관련한 추후 과제로는 1) 자유도가 6관절형인 수직다관절 매니퓰레이터를 위한 충돌회피 알고리즘의 개발, 2) Two Arm Robot의 상대 위치를 위한 Auto-Calibration 시스템의 개발, 3) CAD Based Trajectory 생성 등이 있다.

• 제어로봇시스템학회:학술대회논문집
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• 1989.10a
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• pp.211-215
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• 1989

This paper describes a dynamic robotic assembly system in which an industrial robot executes peg-in-hole task in a moving state. As an effective means to synchronize the end-effector of the robot with the moving conveyor this work uses a control algorithm which is essentially a PID position control scheme combined with velocity feedforward loop. A RCC wrist is used for the inserting task and its force responses are investigated for various tracking conditions and inserting velocities through a series of experiments.

• 제어로봇시스템학회:학술대회논문집
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• 1988.10a
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• pp.433-437
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• 1988

Direct measurement of the relative position between the end effector of robot and moving objects reduces difficulties caused by the joint encoder reading and transformation. For those purpose, the on-line sensing method using PSD sensor was developed in this paper. The sensor was calibrated on the precision table. Then, the relative position of a moving objects on the conveyor was measured while the robot was tracking the one.

• 연구논문집
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• s.26
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• pp.57-68
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• 1996

Recently, a lot of researches on material handling system are actively studied for realization of FA(Factory Automation), FMS(Flexible Manufacturing System) and CIM(Computer Integrated Manufacturing). Management and application of material handling system are precondition technologies playing an important part in integration of production system including manufacturing. assemhly, and inspection cell. In this paper, the general situation of automation technology is investigated and technology level is analyzed in comparision with an advanced country. And the operation trend and part of material handling system including AS/RS, AGV, and Conveyor, are studied. And also technologies related to material handling system in the inside and outside of the country are studied.