• 한국항해학회지
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• 제23권2호
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• pp.1-9
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• 1999

A trailer truck is a major equipment for transporting containers, and its driving is difficult due to two degrees of freedom which exist in the joint part between truck and trailer. Especially Backing a trailer truck to a parking home is a difficult exercise for all but the most skilled truck drivers. Normal driving instincts lead to erroneous movements. When watching a truck driver backing toward a parking home, one often observes the driver backing, going forward, backing again, going forward, etc., and finally backing to the desired position along the parking home. This paper discusses the design of the controller to control the steering of a trailer truck while only backing up to a parking home from an initial position. In this paper, we propose a backing up control system for a container trailer truck using fuzzy theory where the primitive fuzzy control rules are macroscopically designed using an expert's knowledge, and the control rules are regulated by LIBL(Linguistic Instruction Based Learning) to enable to back up successfully the trailer tuck to a parking home from arbitrary initial position. The validity of the proposed parking control system is shown by applying it to some initial positions on the simulator for container trailer truck.

• KIEAE Journal
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• 제13권6호
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• pp.39-44
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• 2013

As the use of electric vehicles perspectively increases, infrastructures for charging car batteries need to be properly planned for satisfying new requirements. This study aimed at theoretically investigating the relative laws, size of existing parking lots, and diverse car sizes for suggesting parking places for electric vehicles. In addition, potential problems for changing existing parking lots to new parking lots for electric vehicles were thoroughly considered. Based on the problem recognition, the feasibility, in particular, of the change of existing parking place to new place equipped with electricity charging systems was investigated. The comprehensive reviews and surveys revealed that additional systems for charging electricity need to be developed to be suspended on the ceiling for existing parking lots in order to prevent changing current layout of the space. This system will alleviate the perspective problems when the charging systems are located on the floor such as contamination, electric shock, and damage by cars. Further study will be followed for testing performance of the suggested systems in the actual parking lots.

• 동력기계공학회지
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• 제16권6호
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• pp.66-72
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• 2012

The parking brake embedded in track driving motor for driving an excavator is composed of wet type multi-friction discs. This type parking brake can be designed more compact because the combination of some sheets of friction discs generate great braking power, and also it has good braking characteristic and long life time because it works in the oil. In this study, we analyzed torque characteristic of the parking brake through simulations and performed experiments by use of 3-kinds of paper friction sheet manufactured by different pressing methods. And, we compared the maximum static friction coefficient and torque characteristic with the simulation results and confirmed the optimal manufacturing process through this result.

• 한국통신학회논문지
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• 제35권1B호
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• pp.125-135
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• 2010

최근 지구 온난화가 가속화됨에 따라 고도화된 IT를 활용하여 환경을 보전하고자 RFID/USN을 활용한 Green IT에 관심이 집중되고 있다. 본 논문에서는 지하주차장과 같은 공동시설에서 불필요하게 낭비되는 전기에너지를 줄이고자 유비쿼터스 센서 네트워크 기반 지하주차장 조명제어시스템을 구현하였다. 지하주차장 조명제어시스템은 차량의 진출입을 감지하기 위한 교차로노드와 조명등을 제어하기 위한 조명노드로 구성된다. 지하주차장과 같은 특수한 환경에 적합한 계층적 클러스터 기반 라우팅 프로토콜, 계층적 주소할당 기법, 확률적 필터링 기법을 개발하여 적용하였다. 지하주차장 조명제어시스템을 구현하여 전기에너지 절감율을 실험한 결과 약 61.7% 절감됨을 확인할 수 있었다.

• 한국태양에너지학회 논문집
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• 제27권3호
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• pp.71-77
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• 2007

In past, parking lot was placed on the ground and for the reason air quality was not in problem. But recently parking lot has been placed under the ground and the air quality becomes problem. So in this study, the ventilation performance on the underground parking lot was estimated by using CFD software and alternative system was suggested. Three case studies are handled in this study. 1st case is just an underground parking lot. 2nd case is about an underground parking lot where has 4 fan rooms on each floor and 3rd case is about an underground parking lot where has 4 fan rooms and 30 guidance fans on each floor.

• 디지털콘텐츠학회 논문지
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• 제18권7호
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• pp.1443-1450
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• 2017

본 연구는 지역축제 시 갑자기 증가하는 주차병목문제를 해결하기 위해 IoT(Internet of Things)의 센서네트워크 중 저전력, 장거리 무선망인 LoRa 네트워크 기반으로 한 인공지능 주차시스템을 개발하는데 주 목적이 있다. 지리적 범위와 시간의 제한을 특징으로 하는 지역 축제에서는 관광객들이 짧은 시간에 최대한 많은 것들을 누리려 하는 욕구를 가지는데, 이때 발생하는 교통체증에 대한 효과적인 주차 공간 분배 문제가 필수적이다. 축제전용 주차장의 용량이 각기 제한적이므로 각 주차장의 수용가능규모의 임계값을 넘기 전에 다른 축제장으로 유도하는 것이 필요하다. 이를 위해 주차 대기시간 및 주차서비스에 성공하기까지의 확률분포는 큐잉이론의 쁘아송 분포를 따르며, 가장 빠른 길을 찾기 위해 Q-learning 알고리즘을 적용한다. 본 연구는 이 두 가지의 알고리즘을 융합하여 축제 장소에서 적용 가능한 지능형 주차시스템을 제안하고 실험한다.

• 한국산학기술학회논문지
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• 제15권2호
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• pp.1083-1088
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• 2014

최근 영상 기술과 ICT 기술의 발전으로 인해 다양한 형태의 영상처리 서비스가 가능하게 되고, 이러한 기술을 활용하는 응용 서비스가 다양화 되고 있다. 자동차 번호판 인식은 주차관리 등 차량의 정보를 인지하는 곳에 사용되는데 기존의 시스템들은 주차권 발급이나 불필요한 장비 부착 등 경제적인 단점을 갖고 있다. 이러한 문제점을 개선하기 위하여 본 논문에서는 OpenCV를 근간으로 한 emguCV를 이용하여 차량의 고유번호인 자동차 번호판 인식을 통한 자동 주차관리 시스템을 설계 및 구현하였다. 그리고 사용자 프로그램 개발에 가장 최신 기술인 WPF를 이용하여 각 주차 차량의 상세정보와 주차 시간 및 남은 주차 공간 정보 등 전체 주차관리 사항을 화면이동 없이 관리할 수 있도록 개선된 UI를 설계하였다. 본 논문에서 사용된 emguCV는 Intel 기반의 환경에서 최적화된 성능을 나타내었다. 따라서 본 논문에서는 0.5초 이내의 번호판 인식 처리 시간과 90% 이상의 인식률이라는 결과를 얻었다. 또한 관리자가 전체 시스템을 간편하고 직관적으로 관리할 수 있게 UI가 개선되었음을 보였다.

• 한국자동차공학회논문집
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• 제17권2호
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• pp.1-9
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• 2009

A parking-assist system is defined that a driver adjusts vehicle velocity through brake pedal operation and parking-assist system controls the motion of the vehicle to follow a collision-free path. In this study, a motion control algorithm using Fuzzy inference is proposed to track a maneuvering clothoid parallel path. Simulations are performed under SIMULINK environments using MATLAB and CarSim for a vehicle model. As the vehicle model in MATLAB a bicycle model is used including lateral dynamics. The simulation results show that the path tracking performance is satisfactory under various driving and initial conditions.

• 정보통신설비학회논문지
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• 제8권1호
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• pp.24-29
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• 2009

In this paper, we show the implementation of the low-cost RF transceiver module for parking control system. Super regenerative receiver scheme was adopted for this module due to its simplicity, low-cost, low power consumption and small number of components to improve reliability of the systems. For improving communication error rate by collision and in-band noise, dual-channel hopping scheme was adopted. Testing prototypes under the environment of simultaneous transmissions, we verified that the designed scheme is able to improve the success rate of data transmission of wireless parking control system cost effectively.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2001년도 가을 학술발표회 논문집
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• pp.143-150
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• 2001

In this paper, the effects of vehicle loads on flat slab system are investigated based on the previous studies on beam-girder parking structural system. The influence surfaces of flat slab for typical design section are determined for the purpose of obtaining member forces under vehicle loads. In addition, the equivalent vehicle load factors for flat slab parking structures are suggested using neural network. It has been found that vehicle load effects of flat slab system are dominant for the center positive moment in both column and middle strip, as like beam-girder parking structural system.