• Title/Summary/Keyword: Door

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Analysis of Door Effort using 2D Model (2차원 모델을 이용한 도어 개폐력 해석)

  • 김창원;강성종
    • Transactions of the Korean Society of Automotive Engineers
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    • v.11 no.3
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    • pp.131-137
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    • 2003
  • Proper door effort, required force to open or close a vehicle door, is an essential door design factor for the safety of passengers and pedestrians. Section shape of the door checker arm is the most influential design parameter for achieving a door effort design target. In this research. an analysis procedure to predict door effort using a simplified plane strain finite element model wes investigated for two passenger cars, for which mechanism of checker systems were: different. The variation of checker arm force to be required during moving on arm in opening and closing direction was estimated through analysis, and the result was transformed to the door effort with respect to door opening angle by considering door characteristics. Also, the self·closing force due to door weight was theoretically calculated and added to the door effort from checker arm force. Finally the estimated results of door effort were compared with test results.

Door Detection with Door Handle Recognition based on Contour Image and Support Vector Machine (외곽선 영상과 Support Vector Machine 기반의 문고리 인식을 이용한 문 탐지)

  • Lee, Dong-Wook;Park, Joong-Tae;Song, Jae-Bok
    • Journal of Institute of Control, Robotics and Systems
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    • v.16 no.12
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    • pp.1226-1232
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    • 2010
  • A door can serve as a feature for place classification and localization for navigation of a mobile robot in indoor environments. This paper proposes a door detection method based on the recognition of various door handles using the general Hough transform (GHT) and support vector machine (SVM). The contour and color histogram of a door handle extracted from the database are used in GHT and SVM, respectively. The door recognition scheme consists of four steps. The first step determines the region of interest (ROI) images defined by the color information and the environment around the door handle for stable recognition. In the second step, the door handle is recognized using the GHT method from the ROI image and the image patches are extracted from the position of the recognized door handle. In the third step, the extracted patch is classified whether it is the image patch of a door handle or not using the SVM classifier. The door position is probabilistically determined by the recognized door handle. Experimental results show that the proposed method can recognize various door handles and detect doors in a robust manner.

A Study on Position Control Method of Electric Door of EMU (전기식 도어 위치제어방식 연구)

  • Joung, Eui-Jin;Won, Jong-Un;Kim, Gil-Dong;Lee, Han-Min;Lee, Chang-Mu;Hong, Jai-Sung
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.3086-3091
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    • 2011
  • Many types of door system are used in the Electric Multiple Unit (EMU). The door system is categorized to the two types of door system, sliding door and plug door. The sliding door is widely used in the EMU but has weak point for the noise problem. The plug door has advantages for the noise reduction characteristic. Nowaday electric door system is widely used and motor is a main part of driving system in the door system. We have to know the exact driving position of door system to control proper operation of the door. Actually encoder or tachometer is used for the position controlling, but it makes price increase and failure increase. In this paper, we study and describe motor current calculation method to contol and know exact driving position of door system.

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Influencing Factors of Sales Process and Task Education on Sales of Health Functional Food in Door-to-door Saleswomen (건강기능식품 여성 방문판매원의 판매과정, 직무교육 요인이 건강기능식품 매출에 미치는 영향 분석)

  • Nam, Minyoung;Yoon, Sun;Lee, Hae-Young;Chung, Hye-Kyung
    • Journal of the Korean Society of Food Culture
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    • v.29 no.4
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    • pp.326-335
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    • 2014
  • The purpose of this study was to investigate factors influencing sales of health functional foods by door-to-door saleswomen. A total of 450 women who worked as door-to-door salespersons in Seoul were enrolled. The survey questionnaire was composed of five parts as follows: general characteristics, factors related with door-to-door sales process, task education, competency required for door-to-door salespersons, and customer relationship beliefs. The survey was conducted in October 2011. Finally, data on 302 subjects were statistically analyzed using the SPSS 17.0 package program. Reason for sales of health functional foods (p<0.01), time required for sales promotion (p<0.001), difficulties during sales of health functional foods (p<0.05), satisfaction of task education (p<0.01), and failure of salesperson's memory as problems of task education (p<0.01) were significantly associated with sales of health functional foods. However, means of sales promotion, frequency and time of task education, and competency required for door-to-door salespersons were not significantly related with sales of health functional foods. Customer relationship beliefs did not show significant association with sales of health functional foods either. In conclusion, certain factors were associated with sales of health functional foods by door-to-door saleswomen. These results provide an understanding for sales of door-to-door health functional foods and provide basic information for preparation of task education for health functional food saleswomen and marketing.

System Thinking for Increasing the Operational Efficiency of Door-to-door Delivery Network (택배네트워크의 운영효율성 증진을 위한 시스템 사고)

  • Choi, Kang-Hwa
    • Korean System Dynamics Review
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    • v.12 no.1
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    • pp.89-114
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    • 2011
  • With steady increase in the demand for door-to-door delivery services, courier service providers are facing a constant pressure to reduce delivery price in order to secure quantity order and to improve the efficiency and reliability for customer service. The objective of this research is to explain the structure of the door-to-door delivery including door-to-door delivery service demand, sorting capacity in the hub-terminal, and the system performance measures such as service reliability networks using causal loop diagram(CLD). Based on causal relation, this research describes a comprehensive approach to examine how capacity reliability contributes to the renewal of the firm's competences through its reciprocal relationship with travel time reliability and connectivity reliability. Also, this research suggests the policy alternatives to improve effectiveness and efficiency of door-to-door delivery network in response to increase customer satisfaction and profit maximization of the courier service providers: operational, tactical, and strategic levels.

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Door Effort Analysis for Hybrid Door Checker (하이브리드 도어 체커 개폐력 해석)

  • Kang, Sung-Jong;Kim, Dong-Hwan
    • Transactions of the Korean Society of Automotive Engineers
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    • v.20 no.3
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    • pp.52-57
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    • 2012
  • Proper door effort is required for the safety of passenger and pedestrian while securing door operating convenience. 3D finite element analyses for a hybrid door checker were carried out to estimate door checker arm resistance force. And, from the estimated door checker arm resistance force and theoretically calculated self-closing force, door effort was predicted. The analysis results at checker arm peaks showed excellent correlation with the test results. Also, in order to reduce solving time, a modified model with simple spring element was investigated. Finally an equation to easily calculate checker arm resistance force from checker arm shape and spring constant was suggested and its usefulness in early design stage was discussed.

The Optimization of the Press-type Door Hinge of the Full-sized Car (대형차량의 프레스타입 도어힌지 적용을 위한 최적화 연구)

  • Yang, Ji-Hyuck
    • Journal of the Korean Society for Precision Engineering
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    • v.27 no.5
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    • pp.48-55
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    • 2010
  • The Door hinge is a very important part for door sagging performance of a vehicle. It is divided into two classes as a forge- and press-type according to a manufacturing technique. The press-type door hinge is cheap, but shows low strength. To apply the press-type door hinge to a fullsized car with satisfactory door sagging performance, we optimized the design parameters of the door hinge using the DFSS method. As a result, the effective design parameters of the press-type door hinge with good door sagging performance were obtained.

Development of Simulator and Robotic Door for Parametric Design Optimization of Washing Machine Door Motion (세탁기 도어 거동 인자 설계 최적화를 위한 시뮬레이터 및 로봇형 도어 장치 개발)

  • Yi, June-Sup;Jung, Byung-Jin;Moon, Hyungpil
    • The Journal of Korea Robotics Society
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    • v.12 no.1
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    • pp.19-25
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    • 2017
  • A design methodology for parametric design optimization of washing machine door is presented. We develop a motion simulator and a robotic door to simulate the various motion of washing machine doors. The motion of the washing machine door is related to hinge parameters. Springs and dampers are usually used in the hinge of washing machine door for controlling motion of the door. A physical simulator of the door motion is used for finding candidate parameters of the hinge and a robotic door whose motion is controlled algorithmically is used for consumer tests. Through the consumer evaluation on the robotic motion, the optimized parameters are determined. We find the optimal parameters as a function of angle and angular velocity of the door.

User Expectations and Preferences of Door Lock Control Devices (문 잠금 조정장치에 관한 사용자 기대 및 선호도)

  • Jung, Hwa S.;Jung, Hyung-shik
    • Journal of Korean Institute of Industrial Engineers
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    • v.29 no.4
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    • pp.283-291
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    • 2003
  • The purposes of this study are to investigate the stereotype of position and direction that users expect door lock control devices in different orientations, and to collect information regarding preferred door lock design and orientations. Six hundred subjects aged from lOs to 60s were surveyed under the operating conditions of three different door locks(cylindrical, circular-type, and lever-type auxiliary locks) mounted on the miniature door in two different orientations(right and left side). The door locks presented to the subjects were the most widely used door locks in our living environment. The results indicated that if the door locks were seen from the inside, 59~67% of the subjects expected 'vertical' position locking depending on the door lock control types, cylinder or auxiliary lock. When the door locks were seen from the outside, the locking direction of door lock control was not consistent either 'clockwise' or 'counterclockwise'. It was rather dependent on the orientation of the door lock positions. As a concluding remark, it is better to design and install door lock control devices in the way that users expect them to work.

The study on appropriateness of adapting door-to-door delivery system for the reducong of waiting time at outpatient pharmacy department in Tertiary care hospital (3차 진료기관 외래약국 투약대기시간 단축을 위한 택배 제도 도입 타당성 조사)

  • Song, Jung-Hup
    • Quality Improvement in Health Care
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    • v.3 no.1
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    • pp.144-152
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    • 1996
  • Background : Because of introduction of nationwide health care system in 1989 and the improvement of socioeconomic status of population the number of outpatient visiting university hospital has good facilities and manpower has increased. So the waiting time for medical service at university hospital are lengthened. Particularly outpatients complain that waiting for prescribed drugs at pharmacy depart are long. Reducing waiting time at pharmacy depart door-to-door delivery system that the patients applying for door-to-door delivery receive prescribed drug at home without waiting at pharmacy depart were studied. The objective of this study is to analysis the opinion of outpatients for door-to-door delivery system, to study the appropriateness of adopting the system and to produce ideal model for the system. Method : Outpatients waiting drug at pharmacy depart were questioned about door-to-door delivery system. to find the factors affect utilizing the system the logistic regression was used. Result : 83.3% of the patients want to utilize the system without charging, and 72.9% of the patients want to utilized system with charging. 68.3% of patients with charging want to use this system because of long waiting time at pharmacy depart. 50% of patients who do not want to use door-to-door do not use this system because of incorrect delivery. The affecting factors to utilize the system were sex, waiting time, fee. Conclusion : The model for door to door delivery system. 1. door-to-door personnel reside in hospital and the patient want to utilize the system apply for the delivery with charging. 2. The applied drugs dispense at spare time. 3. Delivery company gathers drug at appointed time and delivers. 4. The delivery fee is 2,000-3,000 won. 5. To prevent from loss and changing the drug the name of patient on packet are printed and drug packet are sealed. 6. The company submit the confirm sheet which are written that the patient received drug correctly to hospital. 7. The delivery time of drug is reserved for the convenience of receiving.

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