• Title/Summary/Keyword: Automotive system

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Primer Coating Inspection System Development for Automotive Windshield Assembly Automation Facilities (자동차 글라스 조립 자동화설비를 위한 프라이머 도포검사 비전시스템 개발)

  • Ju-Young Kim;Soon-Ho Yang;Min-Kyu Kim
    • Journal of Sensor Science and Technology
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    • v.32 no.2
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    • pp.124-130
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    • 2023
  • Implementing flexible production systems in domestic and foreign automotive design parts assembly has increased demand for automation and power reduction. Consequently, transition to a hybrid production method is observed where multiple vehicles are assembled in a single assembly line. Multiple robots, 3D vision sensors, mounting positions, and correction software have complex configurations in the automotive glass mounting system. Hence, automation is required owing to significant difficulty in the assembly process of automobile parts. This study presents a primer lighting and inspection algorithm that is robust to the assembly environment of real automotive design parts using high power 'ㄷ'-shaped LED inclined lighting. Furthermore, a 2D camera was developed in the primer coating inspection system-the core technology of the glass mounting system. A primer application demo line applicable to the actual automobile production line was established using the proposed high power lighting and algorithm. Furthermore, application inspection performance was verified using this demo system. Experimental results verified that the performance of the proposed system exceeded the level required to satisfy the automobile requirements.

Performance Design of Boiler for Waste Heat Recovery of Engine Coolant by Rankine Steam Cycle (엔진 냉각수 폐열 회수를 위한 랭킨 스팀 사이클용 보일러의 성능 설계)

  • Heo, Hyung-Seok;Bae, Suk-Jung;Hwang, Jae-Soon;Lee, Heon-Kyun;Lee, Dong-Hyuk;Park, Jeong-Sang;Lee, Hong-Yeol
    • Transactions of the Korean Society of Automotive Engineers
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    • v.19 no.5
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    • pp.58-66
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    • 2011
  • A 2-loop waste heat recovery system with Rankine steam cycles for the improvement of fuel efficiency of gasoline vehicles has been investigated. A high temperature loop(HT loop) is a system to recover the waste heat from the exhaust gas, a low temperature loop(LT loop) is for heat recovery from the engine coolant cold relatively. This paper has dealt with a layout of a LT loop system, the review of the working fluids, and the design of the cycle. The design point and the target heat recovery of the LT boiler, a core part of a LT loop, has been presented and analytically investigated. Considering the characteristics of the cycle, the basic concept of the LT boiler has been determined as a shell-and tube type counterflow heat exchanger, the performance characteristics for various design parameters were investigated.

A Study on the Quantitative Measurement of In-plane Displacement of Carbon Steel for Machine Structures according to Rolling Direction using a dual-beam Shear Interferometer (듀얼 빔 전단간섭계를 이용한 압연방향에 따른 기계구조용 탄소강의 면내 변위 정량적 측정에 대한 연구)

  • Kang, Chan-Geun;Kim, Sang Chae;Kim, Han-Sub;Lee, Hang-Seo;Jung, Hyun-il;Jung, Hyun-Chul;Song, Jae-Geun;Kim, Kyeong-suk
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.20 no.4
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    • pp.39-48
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    • 2021
  • In this paper, an in-plane deformation measuring system using a dual-beam shear interferometer was constructed to measure the in-plane deformation of the measuring object. The in-plane deformation of the object was quantitatively measured according to the load and surface treatment conditions of the object. We also verified the reliability of the proposed technique by simultaneously performing the technique with an electronic speckle pattern interferometry system (ESPI), which is another laser application measurement technology. Digital shearography directly measures the deformation gradient or strain components and has the advantages of being full-field, noncontact, highly sensitive, and robust. It offers a much higher measurement sensitivity compared with noncoherent measurement methods and is more robust and applicable to in-field tests.

Development of an Autonomous Vehicle: A1 (자율주행자동차 개발: A1)

  • Chu, Keon-Yup;Han, Jae-Hyun;Lee, Min-Chae;Kim, Dong-Chul;Jo, Ki-Chun;Oh, Dong-Eon;Yoon, E-Nae;Gwak, Myeong-Gi;Han, Kwang-Jin;Lee, Dong-Hwi;Choe, Byung-Do;Kim, Yang-Soo;Lee, Kang-Yoon;Huh, Kun-Soo;SunWoo, Myoung-Ho
    • Transactions of the Korean Society of Automotive Engineers
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    • v.19 no.4
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    • pp.146-154
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    • 2011
  • This article describes the Autonomous Vehicle #1 (A1), which won the 2010 Autonomous Vehicle Competition (AVC) organized by Hyundai Kia automotive group. The A1 was developed for high speed and stable driving without human intervention. The autonomous system of A1 was developed based on in-vehicle networks, electronic control units, and embedded software. Novel environment perception and navigation algorithm were evaluated and validated through the AVC. In this paper, we presented the system and software architecture of A1.

Development and Validation of Robot Steered EPS HILS System (로봇 조향 기반 EPS HILS 시스템의 개발 및 검증)

  • Hong, Taewook;Kwon, Jaejoon;Park, Kihong;Ki, Siwoo;Choi, Sangsoo
    • Journal of the Korean Society for Precision Engineering
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    • v.30 no.1
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    • pp.85-95
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    • 2013
  • As the conventional hydraulic power steering system in the passenger vehicles is being rapidly replaced by EPS (Electric Power Steering) system, performance evaluation of the EPS system has become an important issue in the automotive industries. But the evaluation process takes significant expertise since steering conditions in the test protocols must be implemented with high accuracy. EPS HILS (Hardware-In the-Loop Simulation) system is developed together with robot steering system in this study. Main components of EPS HILS system include: C-EPS hardware, CarSim vehicle model, and road reaction force generation system powered by servo motor. The robot steering system, operated by another servo motor, was combined with EPS HILS system to substitute for steering efforts of human driver. The road reaction force generation system and the robot steering system were carefully validated by using the data obtained from vehicle tests. An on-center handling test was conducted by using EPS HILS system combined with the robot steering system. In the result of this study, robot-steered EPS HILS system developed with its high reliability and no need of skilled driver's, can be widely adopted to evaluate any performance of EPS system.

Life Prediction of Automotive Vehicle's W/H System Using Finite Element Analysis (차량용 와이어하네스의 유한요소해석을 이용한 대변형 내구수명 예측)

  • Kim, Byeong-Sam;Kang, Ki-Jun;Park, Kyoung-Woo;Noh, Kwang-Doo
    • Transactions of the Korean Society of Automotive Engineers
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    • v.18 no.1
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    • pp.139-144
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    • 2010
  • In the automotive electronic industry, the development of vehicle's door wiring harness (W/H) system for new applications is driven continuously for the low-cost and the high strength performance for electronic components. The problem of the fatigue strength estimation for materials and components containing natural defects, inclusions, or inhomogeneities is of great importance both scientifically and industrially. This article gives some insight into the dimensioning process with special focus on the fatigue analysis of wiring harness (W/H) in vehicle's door structures. The results from endurance tests using slim test specimens were compared with the results from FEM for predicted fatigue life. The expectation for the life of components is affected by the microstructural features with complex stress state arising from the combined service loading and residual stresses.

Thermal Flow Analysis of Vehicle Engine Cooling System

  • Park, Kyoung-Suk;Won, Jong-Phil;Heo, Hyung-Seok
    • Journal of Mechanical Science and Technology
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    • v.16 no.7
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    • pp.975-985
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    • 2002
  • This paper deals with theoretical model developed for analyzing the heat transfer of automotive cooling systems. The model has a modular structure which links various cooling system submodels. From the model, heat transfer rate of automotive cooling systems can be predicted, providing useful information at the early stages of the design and development. The aim of the study is to develop a simulation program for automotive cooling system analysis and a performance analysis program for analyzing heat exchanger. Heat release rate from combustion gas to coolant through the cylinder wall in engine cylinder was analysed by using an engine cycle simulation program. In this paper, details of each submodel are described together with the overall structure of the vehicle model.

A Study on the Image DB Construction for the Multi-function Front Looking Camera System Development (다기능 전방 카메라 개발을 위한 영상 DB 구축 방법에 관한 연구)

  • Kee, Seok-Cheol
    • Transactions of the Korean Society of Automotive Engineers
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    • v.25 no.2
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    • pp.219-226
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    • 2017
  • This paper addresses the effective and quantitative image DB construction for the development of front looking camera systems. The automotive industry has expanded the capability of front camera solutions that will help ADAS(Advanced Driver Assistance System) applications targeting Euro NCAP function requirements. These safety functions include AEB(Autonomous Emergency Braking), TSR(Traffic Signal Recognition), LDW(Lane Departure Warning) and FCW(Forward Collision Warning). In order to guarantee real road safety performance, the driving image DB logged under various real road conditions should be used to train core object classifiers and verify the function performance of the camera system. However, the driving image DB would entail an invalid and time consuming task without proper guidelines. The standard working procedures and design factors required for each step to build an effective image DB for reliable automotive front looking camera systems are proposed.

An Implementation and Performance Test of Automotive RTOS Based on OSEK/VDX (OSEK/VDX 기반 차량용 RTOS의 구현과 성능 테스트)

  • Cho, Sung-Rae;Kim, Byung-Joon;Jin, Sung-Ho;Lee, Jun-Ho
    • IEMEK Journal of Embedded Systems and Applications
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    • v.6 no.3
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    • pp.139-148
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    • 2011
  • As the architecture of automotive software is complicated and LOC of software increases, there is an increasing demand for standard operating system. OSEK/VDX defines an industry standard for automotive operating system and middleware. This paper introduces an implementation of RTOS(OSCAR-OSEK) based on OSEK/VDX standard. For better speed of scheduling, we suggest a new method for ready queue implementation considering the characteristic of automotive application software. Also we introduce a method for improving the portability of RTOS on various MCUs. And, we show OSCAR-OSEK implementation and performance test results.