• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.289-292
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• 2005

임베디드 시스템은 하드웨어와 소프트웨어의 결합으로 이루어지며 일반적으로 임베디드 시스템을 구성하는 소프트웨어는 하드웨어로 제공되는 기능 개발 이후 시스템의 추가 기능을 제공하기 위해 개발되어 왔다. 임베디드 시스템의 개발 주기와 사용 주기는 상당히 짧아 시장성에 부합하는 임베디드 시스템을 개발하기 위한 체계적인 임베디드 시스템의 개발 지원 방법은 지속적으로 요청되고 있는 실정이다. 무엇보다도 개발 초기 단계에서부터 하드웨어와 소프트웨어 개발 요구 사항들이 분석되고 설계되어야 한다. 본 논문에서는 소프트웨어 관점에 기반해 임베디드 시스템의 설계 시 고려해야 할 요구 사항과 이를 지원하기 위한 방안에 대해 종합적으로 살펴보도록 한다.

• Journal of Institute of Control, Robotics and Systems
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• v.9 no.4
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• pp.340-346
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• 2003

Driven by the growth of the Internet and the increasing ubiquity of embedded computing systems, the embedded system is exploding in terms of it proliferation of products and the number of complex applications. Intelligent dedicated systems and appliances used in interface, monitoring, communications, and control applications increasingly demand the services of a sophisticated, state-of-the-art operating system. In the case of industrial controller, it is required to use a real-time operating system (RTOS) as a good building block to enable Internet connectivity. However, commercial RTOSes are increasingly less desirable due to their lack of standardization and their inability to keep pace with the rapid evolution of technology. In order to overcome these problems, we consider using embedded Linux and embedded web server. Availability of source code, reduced licensing, reliability, open source community support, as well as others, are key reasons for the use of embedded linux by embedded developers. In this paper, we develop embedded linux platform to control the industrial inverter with the Internet connecting feature. The method of web-based management is also proposed by using the embedded web server and Java applet. We show the feasibility of remote management for the commercial inverter controller with the proposed three-tier web-based remote management system.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06a
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• pp.275-276
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• 2007

• IEMEK Journal of Embedded Systems and Applications
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• v.1 no.1
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• pp.1-7
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• 2006

In this paper, a novel power management structure for an energy harvesting pervasive system is proposed. The system considers the power state of each subsystem to assign proper power sources. The switch matrix structure utilizes each power source to reduce the peak current of the battery. The power management structure can be interfaced to an embedded system power supply without significant design change.

• Journal of the Korea Institute of Military Science and Technology
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• v.10 no.2
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• pp.5-11
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• 2007

In digital warfare, communications between combat vehicles should be managed and synchronized in order to ensure the survivability of vehicles. Embedded battle management systems is designed to share battle information with combat vehicles in real-time. In this study, the details of embedded battle management systems which are successfully implemented in combat vehicles are presented.

• Proceedings of the KIEE Conference
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• 2006.04a
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• pp.177-179
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• 2006

This paper presents an analysis architecture of embedded operating systems for wireless sensor network. Wireless multi-hop sensor networks use battery-operated computing and sensing device. We expect sensor networks to be deployed in an ad hoc fashion, with very high energy constraints. These characteristics of multi-hop wireless sensor networks and applications motivate an operating system that is different from traditional embedded operating system. These days new wireless sensor network embedded operating system come out with some advances compared with previous ones. The analysis is focusing on understanding differences of dominant wireless sensor network OS, such as TinyOS 2.0 with TinyOS 1.x.

• IEMEK Journal of Embedded Systems and Applications
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• v.15 no.2
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• pp.51-60
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• 2020

Optical character recognition (OCR) has been studied for decades because it is very useful in a variety of places. Nowadays, OCR's performance has improved significantly due to outstanding deep learning technology. Thus, there is an increasing demand for commercial-grade but affordable OCR systems. We have developed a low-cost, high-performance OCR system for the industry with the cheapest embedded developer kit that supports GPU acceleration. To achieve high accuracy for industrial use on limited computing resources, we chose a state-of-the-art text recognition algorithm that uses an end-to-end deep learning network as a baseline model. The model was then improved by replacing the feature extraction network with the best one suited to our conditions. Among the various candidate networks, EfficientNet-B3 has shown the best performance: excellent recognition accuracy with relatively low memory consumption. Besides, we have optimized the model written in TensorFlow's Python API using TensorFlow-TensorRT integration and TensorFlow's C++ API, respectively.

• Proceedings of the International Microelectronics And Packaging Society Conference
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• 2006.02a
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• pp.77-85
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• 2006

• Journal of Welding and Joining
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• v.31 no.5
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• pp.59-63
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• 2013

A bendable electronic module has been developed for a mobile application by using a low-cost roll-to-roll manufacturing process. In flexible embedded electronic module, a thin silicon chip was embedded in a polymer-based encapsulating adhesive between flexible copper clad polyimide layers. To confirm reliability and durability of prototype bendable module, the following tests were conducted: Moisture sensitivity level, thermal shock test, high temperature & high humidity storage test, and pressure cooker tester. Those experiments to induce failure of the module due to temperature variations and moisture are the experiment to verify the reliability. Failure criterion was 20% increase in bump resistance from the initial value. The mechanism of the increase of the bump resistance was analyzed by using non-destructive X-ray analysis and scanning acoustic microscopy. During the pressure cooker test (PCT), delamination occurred at the various interfaces of the bendable embedded modules. To investigate the failure mechanism, moisture diffusion analysis was conducted to the pressure cooker's test. The hygroscopic characteristics of the encapsulating polymeric materials were experimentally determined. Analysis results have shown moisture saturation process of flexible module under high temperature/high humidity and high atmosphere conditions. Based on these results, stress factor and failure mechanism/mode of bendable embedded electronic module were obtained.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.840-841
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• 2012

This paper represent a method of next generation IT fields of embedded systems. we discuss the background why the embedded systems is the importance in the next generation IT fields. Also, we describe the hardware oriented embedded systems, the embedded hardware processor, specified processor. And we discuss the embedded system application fields, i.e. mobile phone application, STB application, telematics fields, home automation, personal digital assistant and so on.