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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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IEMEK Journal of Embedded Systems and Applications
Journal Basic Information
Journal DOI :
Institute of Embedded Engineering of Korea
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Volume & Issues
Volume 3, Issue 4 - Dec 2008
Volume 3, Issue 3 - Sep 2008
Volume 3, Issue 2 - Jun 2008
Volume 3, Issue 1 - Mar 2008
Selecting the target year
Development of an Intelligent Unmanned Vehicle Control System
Kim, Yoon-Gu ; Lee, Ki-Dong ;
IEMEK Journal of Embedded Systems and Applications, volume 3, issue 3, 2008, Pages 126~135
The development of an unmanned vehicle basically requires the robust and reliable performance of major functions which include global localization, lane detection, obstacle avoidance, path planning, etc. The implementation of major functional subsystems are possible by integrating and fusing data acquired from various sensory systems such as GPS, vision, ultrasonic sensor, encoder, and electric compass. This paper focuses on implementing the functional subsystems, which are designed and developed by a graphical programming tool, NI LabVIEW, and also verifying the autonomous navigation and remote control of the unmanned vehicle.
Development of an Indoor Networked Security Robot System
Park, Keun Young ; Heo, Guen Sub ; Lee, Sang Ryong ; Lee, Choon Young ;
IEMEK Journal of Embedded Systems and Applications, volume 3, issue 3, 2008, Pages 136~142
Mobile robots can offer services like intelligent monitoring in an indoor environment using network connection with remote users. In this paper, we designed and developed a networked security robot system with various sensors, such as flame detector, gas detector, sound monitoring module, and temperature sensor, etc. The robot can be accessed through a web service and the user can check the status of the environment. Using ADAMS software, we defined the motor specification for a worst-case condition of climbing over a obstacle. We applied the robot system in monitoring office condition.
Investigation on the Real-Time Environment Recognition System Based on Stereo Vision for Moving Object
Lee, Chung-Hee ; Lim, Young-Chul ; Kwon, Soon ; Lee, Jong-Hun ;
IEMEK Journal of Embedded Systems and Applications, volume 3, issue 3, 2008, Pages 143~150
In this paper, we investigate a real-time environment recognition system based on stereo vision for moving object. This system consists of stereo matching, obstacle detection and distance estimation. In stereo matching part, depth maps can be obtained real road images captured adjustable baseline stereo vision system using belief propagation(BP) algorithm. In detection part, various obstacles are detected using only depth map in case of both v-disparity and column detection method under the real road environment. Finally in estimation part, asymmetric parabola fitting with NCC method improves estimation of obstacle detection. This stereo vision system can be applied to many applications such as unmanned vehicle and robot.
3D Distance Measurement of Stereo Images Using Web Cams
Kim, Seung-Hwan ; Ham, Woon-Chul ;
IEMEK Journal of Embedded Systems and Applications, volume 3, issue 3, 2008, Pages 151~157
In this paper, we propose a three dimensional distance measurement method for a stereo system by using web cams. Using a parallel stereo system, a robot gets two images from each webcam and equalize brightness of both images. And we suggest an image processing method such as labeling, isolating an object from background and finding center of an object. We also propose a method of calculating the focal distance by using least square algorithm based on triangulation and we can reduce calculation error by this method. From experimental results, we show that the proposed method can be effective for 3D distance measurement.
(PMU (Performance Monitoring Unit)-Based Dynamic XIP(eXecute In Place) Technique for Embedded Systems)
Kim, Dohun ; Park, Chanik ;
IEMEK Journal of Embedded Systems and Applications, volume 3, issue 3, 2008, Pages 158~166
These days, mobile embedded systems adopt flash memory capable of XIP feature since they can reduce memory usage, power consumption, and software load time. XIP provides direct access to ROM and flash memory for processors. However, using XIP incurs unnecessary degradation of applications' performance because direct access to ROM and flash memory shows more delay than that to main memory. In this paper, we propose a memory management framework, dynamic XIP, which can resolve the performance degradation of using XIP. Using a constrained RAM cache, dynamic XIP can dynamically change XIP region according to page access pattern to reduce performance degradation in execution time or energy consumption resulting from native XIP problem. The proposed framework consists of a page profiler gathering applications' memory access pattern using PMU and an XIP manager deciding that a page is accessed whether in main memory or in flash memory. The proposed framework is implemented and evaluated in Linux kernel. Our evaluation shows that our framework can reduce execution time at most 25% and energy consumption at most 22% compared with using XIP-only case adopted in general mobile embedded systems. Moreover, the evaluation shows that in execution time and energy consumption, our modified LRU algorithm with code page filters can reduce more than at most 90% and 80% respectively compared with applying just existing LRU algorithm to dynamic XIP.
Analysis of Active Safety System and UWB Radar Technology for Vehicle
Kim, Sang-Dong ; Lee, Jong-Hun ;
IEMEK Journal of Embedded Systems and Applications, volume 3, issue 3, 2008, Pages 167~174
This paper presents the technology trend of various active safety systems for vehicle. The safety system is applied to various industry fields and is expected to be spread all over the market. So far, good examples of the developed active safety systems are ACC(Adaptive Cruise Control), CMS(Collision Mitigation Systems) and APSS(Active Pedestrian Safety Systems). And, a basic operation principle, system model and detection performance in a UWB radar for vehicle is investigated.