• Title/Summary/Keyword: 폐색 장치

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A Field test of an Integrated Electronic Block System for verification of the suitability (통합형 전자폐색제어장치의 적합성 확인을 위한 현장시험)

  • Kim, Young-June;Baek, Jong-Hyen
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.12
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    • pp.6427-6433
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    • 2013
  • For trains to run safely and quickly, the train should always follow the preceding train at a proper spacing. For this purpose, a certain distance between the stations is set for each block section. For the safe operation of trains in one block section, only one train service for an automatic block system is needed. The existing block system is composed an ABS, which is a linked track circuit and line sideway system through the interlocking system. The interlocking system is being replaced with a domestic electronic interlocking system. On the other hand, the block system still uses the relay format of an analog system, and is independently installed of the line sideway systems. Therefore, the existing block system has many problems in terms of construction and maintenance. In addition, the existing domestic line is used for ABS and LEU , which is installed separately, despite the train being controlled by the information of the same signal at the same location. This is not efficient in terms of each product price and the maintenance costs. This paper introduces an integrated electronic block system and the field test results. The field test was carried out through a periodic inspection performed eight times from January to late August.

The Role of Automatic Block System in On-board signal (차상신호방식에서의 자동폐색시스템의 역할)

  • Kim, Yong-Kyu;Baek, Jong-Hyun;Ryu, Chang-Keun
    • Proceedings of the KIEE Conference
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    • 2004.04a
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    • pp.241-243
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    • 2004
  • 본 논문은 차상신호시스템의 설치시 기존의 자동폐색장치의 적용 가능성 및 개량 범위 등에 대해 분석하였다. 이는 주로 자동폐색장치의 특성 및 관련 폐색거리, 폐색신호와 차상신호의 혼용 운영 및 차상신호 적용시의 폐색신호 인터페이스 방안 등을 중점적으로 검토하였다.

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Maxillofacial rehabilitation of hemi-maxillectomy patient using a closed hollow bulb obturator fabricated by one-step polymerization technique: a clinical report (상악골 부분절제술 시행 환자에서 one-step 중합 기술로 만든 hollow bulb 폐색장치를 이용한 악안면 수복 증례)

  • Sim, Jae-Hyuk;Kim, Min-Kyoo;Han, Jung-Suk;Lee, Jai-Bong;Kim, Sung-Hun;Yeo, In-Sung
    • The Journal of Korean Academy of Prosthodontics
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    • v.54 no.1
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    • pp.35-40
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    • 2016
  • The maxillary defects lead to anatomical and functional deformity of the maxillofacial region. As far as functions are concerned, such defects can produce difficulty in speech, mastication, and deglutition. Obturator prostheses play a very important role in functional recovery for post-maxillectomy patients. To achieve rigidity of the obturator, appropriate retention should be given, and the weight of the prosthesis be reduced. There are two types of hollow bulb obturator: open and closed. A closed type has many advantages. Nevertheless, some problems, including complexity of fabrication and water leakage into the bulb, have the closed hollow obturator not be widely used. The one-step polymerization technique described in this case overcomes the shortcomings by easily constructing a small hollow bulb with two thermoplastic resin sheets.

Fabrication of implant-associated obturator after extraction of abutment teeth: a case report (지대치 발거 후 임플란트 연관 상악 폐색장치 제작 증례보고)

  • Ki-Yeol Jang;Gyeong-Je Lee
    • Journal of Dental Rehabilitation and Applied Science
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    • v.39 no.4
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    • pp.229-236
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    • 2023
  • Maxillary bone defects may follow surgical treatment of benign and malignant tumors, trauma, and infection. Palatal defects often lead to problems with swallowing and pronunciation from the leakage of air into the nasal cavity and sinus. Obturators have been commonly used to solve these problems, but long-term use of the device may cause irritation of the oral mucosa or damage to the abutment teeth. Utilizing implants in the edentulous area for the fabrication of the obturators has gained attention. This case report describes a patient, who had undergone partial resection of the maxilla due to adenocarcinoma, in need of a new obturator after losing abutment teeth after long-term use of the previous obturator. Implants were placed in strategic locations, and an implant-retained maxillary obturator was fabricated, showing satisfactory results in the rehabilitation of multiple aspects, including palatal defect, masticatory function, swallowing, pronunciation, and aesthetics.

Use of artificial palate for improving facial support in the fabrication of a maxillary obturator: A case report (상악골 부분 절제술 시행한 환자에서 Artificial Palate로 안모지지를 재현한 폐색장치를 이용한 수복 증례)

  • Yoon, Hee-Kyoung;Hwang, Hee-Seong;Kim, Chul-Hoon;Kim, Jung-Han;Kim, Bok-Joo
    • The Journal of Korean Academy of Prosthodontics
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    • v.55 no.3
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    • pp.319-324
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    • 2017
  • Patients with maxillectomy defects predisposed to not only difficulty in deglutition, mastication, speech but also psychological depression from impaired facial esthetics that affect life quality. Obturator prostheses play a important role in restoring the lost form, function and the quality of life for patients with maxillectomy defects. This clinical report presents the simplified approach to predict the degree of adequate facial support by Artificial palate which reflected from a maxillary interim obturator during the stabilization period after maxillectomy.

Fabrication of closed hollow obturator for hard palate defect patient undergone maxillectomy (상악절제술로 인한 경구개 결손 환자에서의 closed hollow obturator 제작 증례)

  • Jang, Woo-Hyung;Lim, Hyun-Pil;Yun, Kwi-Dug;Park, Chan;Yang, Hong-So
    • The Journal of Korean Academy of Prosthodontics
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    • v.58 no.1
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    • pp.30-34
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    • 2020
  • Maxillectomy is performed to remove the tumor in the palate, maxillary sinus, buccal mucosa or nasal cavity. The resection range depends on the size and the extent of the tumor and it affects speech production or cause nasal regurgitation during feeding. Obturator can occlude an opening such as an oro-nasal fistula and protect the defect area. Successful reconstrucion of the patient's oral cavity who have gone over the maxillectomy is a difficult task. The condition and number of teeth, the remaining support area, and the extent of the defect area have a great influence on manufacturing the obturator. If these factors are disadvantageous, the prognosis of the prosthesis is uncertain. The final obturator must have a sufficient retention in the patient's oral cavity and must not irritate the surrounding tissue and support area where the resection was performed.In this case, a 55 year old female went through the maxillectomy and the only 3 teeth remained. And the retention of the maxillary prosthesis seems to be poor. So that, we fabricated the closed hollow obturator which has reduced weight compared to the conventional obturator. Consequently the closed hollow obturator can give better sealing and the adaptation.

Double Processing Obturator for the Hemi-maxillectomy Treated Patient (Hemi-Maxillectomy 환자에서 이중온성법을 이용한 폐색장치의 제작)

  • Hong, Jun-won;Song, Kwang-yeob;Park, Mi-hee;Jeong, Soo-yang;Kim, Kyoung-il;Ahn, Seung-geun;Park, Ju-mi
    • Journal of Dental Rehabilitation and Applied Science
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    • v.25 no.4
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    • pp.329-336
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    • 2009
  • In the case of congenital malformation, acquired trauma, or maxillectomy by neoplasm, the defect in maxilla is combined with nasal cavity, maxillary sinus and oral cavity. This results in abnormal function in pronunciation, mastication, and swallowing. In this situation, the purposes of prosthodontics are also applied. The purposes of obturator for acquired maxillary deficiency patients are restoring pronunciation, mastication, and swallowing, and make patients comfortable and esthetic satisfaction. Reducing weight of the obturator makes edentulous ridge heathy and functional. It also improves patients' comfort. Hollow obturator also reduces unnecessary stress because improves physiologic function, as it weights less than 6.55-33.06% compare to usual one. This case presents the double-processing method for maxillary obturator in the patient treated hemi-maxillectomy due to malignancy neoplasm. We report this case because the patient acquired functional and esthetic satisfaction from double-processing obturator.

The Development of Integration Electronic Block System for Maintenance Efficiency on Railway Wayside Signalling System (철도 선로변 신호설비 유지보수 효율화를 위한 집중형 전자폐색제어장치 개발)

  • Baek, Jong-Hyen;Jo, Hyun-Jeong;Kim, Yong-Kyu
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.9
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    • pp.4171-4176
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    • 2012
  • The conventional block systems for railway signaling currently in operation in Korea have not been electrified or integrated and therefore there have been difficulties in terms of construction and maintenance. Two independent systems have been installed for ABS and LEU of ATP system (for speeded-up lines), although they deal with the same signaling information at the same location in order to control the trains. In these conventional ABS and LEU, a number of duplicate modules are installed in each device including lamp detection units and power supply units and it results increased manufacturing costs and maintenance efforts. This paper deals with the prototype development of integrated electronic block system with CPU-based digital control methods in order to overcome the limitations of the conventional ABS. The suggested system is the integration of the conventional ABS with LEU of ATP and it is also applicable for the non-ATP sections as well.

The Requirement Elicitation for Block Section Design of The High Speed Train (고속철도 폐색분할 설계를 위한 요구사항 도출)

  • Lee, Kang-Mi;Shin, Duc-Ko;Lee, Jae-Ho;Yoon, Tae-Goo
    • Proceedings of the KAIS Fall Conference
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    • 2010.11a
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    • pp.176-179
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    • 2010
  • 본 논문에서는 고속철도 폐색분할 설계를 위한 요구사항을 도출하였다. 경부고속철도 열차제어시스템은 고정폐색방식으로 KTX가 차량의 물리적 특성, 선로환경 등을 고려하여 분할된 폐색구간을 진입할 때, 선행열차의 점유폐색을 기준으로 궤도회로로부터 해당폐색의 열차 진입/진출속도, 운행가능거리, 감속도 등의 운행정보를 전송받는다. 그리고 차상열차제어시스템은 지상에서 수신한 운행정보를 통해 열차제어곡선을 생성하고 열차가 해당폐색의 기준속도를 초과했을 경우, 비상제동명령을 내려 열차의 안전한 운행을 보장한다. 폐색분할은 열차의 안전한 운행을 위해 고정폐색방식에서 수행되는 기본설계로, 폐색분할 설계 결과는 궤도회로를 비롯한 지상열차제어장치의 수량을 산정하는 기준이 된다. 따라서 본 논문에서는 최고운행속도 300km/h로 운행하는 경부고속철도 폐색분할 설계를 기준으로 폐색분할을 위한 입력요구사항에 대해 분석하였다.

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Analysis on Plugging Force of Open-end Steel Pipe Pile (개단 강관말뚝의 관내토 폐색력 분석)

  • 최용규;김명모
    • Geotechnical Engineering
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    • v.5 no.4
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    • pp.27-36
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    • 1989
  • Load tests are executed on instrumented model piles to evaluate the magnitudes of soil plugging resistances mobilized at open-end pile tips. The plugging resistances are calculated by some existing methods, which are compared with observation. A couple of the methods are found to give good results. A new computational method to predict the plugging resistance is proposed in this paper, which also gives fairly close prodiction to the measurement, and is much simpler than the other computational methods.

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