• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.60-60
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• 2004

광디스크 미디어 저장기기에 있어서 음악과 영상을 재생하는 광디스크 플레이어의 기구부품 중 턴테이블은 디스크를 장착, 고정하여 디스크에 기록된 신호를 재생케 하는 광디스크 메커니즘의 중요기능 부품이다. 특히 별도의 클램퍼 없이 턴테이블에 부설된 탄지력만으로 디스크를 장착, 고정하는 슬림형 플레이어에서 스핀들 모터의 회전 시 턴테이블에 장학된 광디스크의 슬립은 재생에러를 야기한다. 스피닝 회전속도가 증가할수록 디스크의 슬립을 방지하기 위해서는 디스크와 턴테이블의 증가된 마찰력이 요구된다.(중략)

• Journal of the Korean Society for Aviation and Aeronautics
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• v.28 no.4
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• pp.125-131
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• 2020

In order to study the correlation between the pilot's cognitive ability and recovery ability by applying a physical element that can cause spatial loss of position to the pilot, a turntable was installed on the top of the motion system to give a quantitative rotational error. We propose a method of simulating flight movement to reduce a difference in feeling and an intuitive method of forward kinematic analysis.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.887-890
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• 2007

디제잉을 하려면 필수적으로, 턴테이블, 믹서, 스피커와 같은 장비들이 필요하다. 하지만 이러한 장비들은 그 크기가 크고 많은 연결선으로 연결되기 때문에 휴대가 용이하지 않아, 일반인들이 가지고 다니면서 디제잉을 즐기고 음악을 믹싱하기에 적합하지 않다. 많은 사람들이 디제잉과 믹싱을 배우고, 또 언제 어디에서나 쉽게 즐길 수 있게 하기 위해서는 보다 작고, 휴대하기 편하면서도 설치의 번거로움이 없는 새로운 인터페이스를 개발할 필요성이 있다. 이 논문에서는 사람들이 언제 어디에서나 쉽게 디제잉과 믹싱을 즐길 수 있도록 해주는 휴대용 무선 믹싱콘솔 장치를 제안한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.11a
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• pp.89-91
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• 2016

본 논문에서는 실사 영상 기반으로 3D 영상을 생성하기 위하여 효율적으로 다시점 영상을 획득하는 시스템을 제안한다. 기존의 시스템은 대부분 다수의 카메라를 이용하여 다시점 영상을 획득하는 구조이다. 이 경우 각 카메라 간의 정합(calibration)을 수행해야 할 뿐만 아니라 스테레오 매칭을 통해 깊이 정보를 추출하는 과정이 필요하다. 제안하는 시스템에서는 카메라는 고정시킨 상태에서 촬영하고자 하는 객체를 턴테이블 위에 놓고 회전시키면서 촬영한다. 카메라는 Microsoft에서 출시한 컬러 정보와 깊이 정보를 동시에 얻을 수 있는 키넥트(Kinect) v2를 사용한다. 실험을 통하여 제안하는 시스템이 기존 시스템보다 다시점 영상을 효율적으로 생성하는 것을 확인하였다.

• Journal of Auto-vehicle Safety Association
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• v.13 no.2
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• pp.50-56
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• 2021

The purpose of this study is to investigate vulnerable parts of tower crane structures by analyzing extensive non-destructive test data. Approximately ten percent of domestically registered tower cranes were inspected by using magnetic particle inspection. The testing was carried out as advised in KS B 0213. The non-destructive results was analyzed with respect to jib types, age and crane size. As a result, the number of crack occurrences were the largest in mast parts, followed by main jib part. Moreover, it was found that turntables were important parts deserved to be noticed at the perspective of safe maintenance.

• Journal of the Korea Institute of Construction Safety
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• v.1 no.1
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• pp.47-56
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• 2018

In this paper, we analyze various cases of accidents caused by vehicle-mounted MEWPs(mobile elevated work platforms) which are most widely used for the high position level works, review the safety improvement measures for each of them, and propose basic data for the revision of related laws. The accidents by MEWPs were caused by the high level of works, which lead to fatal personnel accidents, so the measures for safety must be thoroughly carried out and the obligatory regulations by the related laws must be strictly observed. In this paper, we classify the cases of accidents at the workshop as 4 representative types and propose measures and remedies for them. According to the current regulations, it is possible to prepare for the accidents such as the wire rope breakage by switching to the all-chain drive method which does not have a daily use time limit instead of the wire rope drive method which is widely used at present. Also, it is suggested to add the daily use timetable to the nameplate attachment duty item according to the driving class.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.10
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• pp.499-504
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• 2017

A Mobile Radio Wave Measurement System (MRWMS)is a vehicle-mounted system designed to be operating in a single mission. The mission characteristic for mobile measurement requires mobility. For this, we must consider the arrangement and embedded method of MRWMS's antennas. In this paper, we described the measurement method design of direction detecting accuracy for MRWMS and designed the direction finding antenna mast capable of rotating itself by using a slip ring without turntable for Direction Finding (DF) accuracy test. As we removed the dependency of a limited local area by designing a measurement method of direction detecting accuracy, Equipment Under Test (EUT) zero-Adjustment and mounted process shortened. So, we the reduced production costs. We expect an improved cable loss value by shortening the RF cable length in accordance with our design. In addition, due to the same phenomenon, the entire system is lighter and the mobility is improved.

• Aerospace Engineering and Technology
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• v.9 no.2
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• pp.138-142
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• 2010

The thrust axis alignment of the launch vehicle is very important because of the misalignment causes the unstable attitude control and results in mission failure. Generally, optical methods such as digital theodolite and laser tracker and mechanical method such as turn table method are used to align thrust axis to vehicle axis. This article deals with the simple method of thrust axis alignment of Kick Motor.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.05a
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• pp.456-458
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• 2023

원본 이미지를 변형하여 학습용 데이터를 확장하는 기법에 대해서는 이전부터 꾸준히 논의된 바가 있다. 턴 테이블과 크로마 키를 이용하여 객체의 영상을 촬영하고 프레임을 추출하여 이미지 분류, 영상 내 객체 탐지 등에 사용이 가능한 데이터 셋의 확장 구축 방안에 대해 다루며, 성능 분석 결과 평균 90% 이상의 객체 검출률을 보였으며 객체 탐지 모델의 경우에서 보다 높은 정확도를 보임을 확인할 수 있었다. 영상내 단일 객체를 인지하기 위한 상황을 위해 본 논문이 제시하는 데이터셋 구축 방안은 충분한 효과를 보일 수 있을 것으로 기대된다.

• Journal of Advanced Navigation Technology
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• v.12 no.5
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• pp.494-501
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• 2008

In this paper, to merge whole 3D information of an occluded body from view point, the new image merging algorithm is introduced after obtaining images of body on the turn table from 4 directions. The two images represented by polygon meshes are merged using weight bipartite matching method with different weights according to coordinates and axes based on minimum distance since two images merged don't present abrupt variation of 3D coordinates and scan direction is one direction. To obtain entire 3D information of body, these steps are repeated 3 times since the obtained images are 4. This proposed method has advantage 200 - 300% searching time reduction rather than conventional branch and bound, dynamic programming, and hungarian method though the matching accuracy rate is a little bit less than these methods.