• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2017.04a
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• pp.18-18
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• 2017

ISO11783은 농업 산업분야 통신 프로토콜의 국제 표준으로, 농용트랙터 및 작업기 ECU 간의 통신 프로토콜을 표준화한다. 이 표준은 서로 다른 제조사의 제품 간에 호환성을 갖게 하며, 정밀 농업에 대한 핵심 기반을 제공한다. 현재 해외에서는 이미 ISO11783 기반의 AFS(Advanced Farming System)를 통한 정밀농업이 상용화되어 농가에 보급되고 있다. 이에 비해, 국내에서 이러한 표준을 따르는 농기계들은 미비한 실정이며, 향후 농업의 정밀 농업화를 통한 고부가가치 창출 및 선진국의 무역 장벽에 대비와 해외 수출 판로 개척을 위해 ISO11783 표준에 대한 R&D가 필요로 한다. 이에 IsoAgLib를 분석하고 임베디드 보드에 Porting하여 ISO11783 기반 작업기 ECU를 구현하였고, 이를 기반으로 ISO11783 기반 작업기 ECU의 구현 방법을 발표한다. IsoAgLib의 시스템 아키텍처는 계층화 되어 있어, 타겟에 의존적인 계층만 수정하여, IAR 환경에서 Cortex M3 보드에 포팅을 완료하였다. 작업기 ECU들은 자신만의 인터페이스 화면을 갖으며, 이를 Object pool이라 한다. 이것을 Virtual Terminal(VT)에 업로드 하여, VT가 해당 작업기 ECU의 사용자 인터페이스 기능을 제공하도록 한다. 이에 작업기 ECU 구현 1 단계로, 'VT-Designer'를 통하여 Object pool를 설계한다. 2 단계, 'vt2iso'를 통해서 Object pool을 IsoAgLib 상에서 사용할 수 있도록 변환한다. 3 단계, 포팅된 IsoAgLib project에 변환된 파일을 포함 시킨다. 4 단계, 작업기 ECU의 주기적인 작업 및 각 메시지 수신시 수행할 작업을 코딩한다. 5 단계, 빌드 및 타겟 보드에 업로딩 한 후, New Holland 사의 $Intelliview^{TM}$ iv display (VT)과 연결하여 동작을 확인한다. 확인 결과로 VT에 디자인한 Object pool이 표시 되며 soft key 입력 시 작업기 ECU에서 LED가 변한다. 결론적으로, 연구 결과를 바탕으로 ISO11783 기반의 작업기 ECU의 디자인 및 구현이 가능하며, 이를 통해 향후 국내의 ISO11783 기반의 작업기 ECU의 개발에 도움을 줄 수 있다.

• Journal of Institute of Control, Robotics and Systems
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• v.18 no.8
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• pp.794-799
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• 2012

The international standard, ISO-11783, was designed for the communication within an agriculture machinery. Even if it is based on the CAN (Control Area Network) protocol, its extended features which include point-to-point communication and large data transmission support show different network performance from the standard CAN. This paper proposes a dynamic priority allocation method to improve the real-time performance of ISO-11783. Computer simulation shows reduction of the deadline-missed cases and community latency via proposed algorithm.

• Journal of Biosystems Engineering
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• v.37 no.4
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• pp.225-232
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• 2012

Purpose: Accurate monitoring of information from various agricultural vehicles is one of the most important factors for appropriate management strategy of field operations. While there has been a number of study and design on applications of sensors and actuators for data acquisition and control system in tractor, incompatibility between various customized hardware and software has become a major obstacle to the universal deployment in real field operation. International standard for implementation of electronic control unit (ECU) in agricultural vehicles has becoming a mandatory requirement for inter-operation compatibility in the international trade of agricultural vehicle industries. The ISO 11783 standard is basically based upon well known communication technology designated using the controller area network (CAN) bus. While CAN bus could provide 1.0 Mbps of communication speed, the standard only recommended 250 kbps. Methods: This study presents the implementation and evaluation of ISO 11783 for tractor electronic control units (TECU)with a higher transmission rate from multiple ECU than 250 kbps. Throughput and loss rate of the developed prototype were calculated across manipulated bus load for laboratory experimental tests, and the maximum requirement of transmission rate by ISO 11873 was satisfied with lower than 60% of bus load. Results: Field tests with a TECU implemented to process messages from global positioning system (GPS) receiver resulted that the root mean square error of position information was lower than 4 m with 0.5 m/s as a travelling speed. Conclusions: Results of this study represent the utilization of the international standard ISO 11783 to providepractical developments in terms with the inter-operability of TECU.

• Smart Media Journal
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• v.4 no.2
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• pp.46-54
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• 2015

Communication between ECUs (Electronic Control Units) in agricultural machineries tends to use IS011783 widely, that is PGN (Parameter Group Number) based communication protocol lays on CAN protocol by altering its identifier part. Messages in line are transferred and received between ECUs according to ISO11783 standard. This paper discusses about design of wireless monitoring system. We used an ARM Cortex-M3 microcontroller embedded development board and marvel8686 wireless module. The wireless ISOBUS monitoring system, attached to communication line, reads messages, interpret them, and display them on the screen in easily comprehendible form. It can be used to generate messages and monitor the traffic on physical bus systems. The monitoring system connected to ECUs, monitor and simulate real traffic of communication and functionality of the ECUs. In order to support our work, we have implemented the monitoring tool. The development consists of two parts: GUI of the application and firmware level programming. Hence the monitoring system is attached to the communication line and equipped by Wi-Fi module; farmer/dispatcher in a farm monitors all messages in communication line on personal computer and smart device.