• Title, Summary, Keyword: Automatic measurement system

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Automatic Hand Measurement System from 2D Hand Image for Customized Glove Production

  • Han, Hyun Sook;Park, Chang Kyu
    • Fashion & Textile Research Journal
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    • v.18 no.4
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    • pp.468-476
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    • 2016
  • Recent advancements in optics technology enable us to realize fast scans of hands using two-dimensional (2D) image scanners. In this paper, we propose an automatic hand measurement system using 2D image scanners for customized glove production. To develop the automatic hand measurement system, firstly hand scanning devices has been constructed. The devices are designed to block external lights and have user interface to guide hand posture during scanning. After hands are scanned, hand contour is extracted using binary image processing, noise elimination and outline tracing. And then, 19 hand landmarks are automatically detected using an automatic hand landmark detection algorithm based on geometric feature analysis. Then, automatic hand measurement program is executed based on the automatically extracted landmarks and measurement algorithms. The automatic hand measurement algorithms have been developed for 18 hand measurements required for custom-made glove pattern making. The program has been coded using the C++ programming language. We have implemented experiments to demonstrate the validity of the system using 11 subjects (8 males, 3 females) by comparing automatic 2D scan measurements with manual measurements. The result shows that the automatic 2D scan measurements are acceptable in the customized glove making industry. Our evaluation results confirm its effectiveness and robustness.

A Study on the Selection of Measurement Point for Automatic Environmental Noise Measurement System (환경소음자동측정망의 측정지점 선정에 관한 연구)

  • Lim, J.S.;Lee, B.C.;Jeong, D.J.;Lee, M.H.;Yang, K.H.;Oh, Y.S.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.442-445
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    • 2007
  • A noise reduction policy can be more effectively made when automatic environmental noise measurement system is set up. However, the local characteristic of noise pollution requires a lot of measurement points. This study considers that automatic environmental noise measurement system connects with automatic air pollution measurement system and noise map. The measurement points of traffic volume by the National Police Agency and the Ministry of Construction and Transportation are investigated to use at drawing the road traffic noise map. Finally, the effective application method of the environmental noise measurement vehicle is discussed.

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A Study on Weld Bead Profile Measurement System for Use in Automatic Weld Bead Removal System

  • Lee, Jeong-Woo;Lee, Eun-Hyun
    • 제어로봇시스템학회:학술대회논문집
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    • pp.194-197
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    • 1999
  • Automatic weld bead removal system is consisted of bead removal tool, bead profile measurement system and tool motion control system. In this paper, design of weld bead profile measurement system which is used for automatic weld bead removal system is described. The system measures the weld bead position, normal vector of the auto-body and weld bead profile. The optical sensor with structured laser beam is used as a sensor and comparison of the sensor that can be used for this purpose is discussed in detail. The measurement process and the related software developed for this purpose are also described. A median filter, average filter and long line filters are used and their effects in bead profile measurement are discussed. The measurement system is integrated into automatic bead removal system and is used to remove weld bead in rear pillar of automotive body. The whole system operates well in automotive body assembly line and thus the system is proved to be good for this purpose.

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A Study of Health & Disaster Monitoring Measurement using Ubiquitous Active Communication Digital Datalogger System for Railway Structures (유비쿼터스 기반 통신의 철도구조물에 대한 재난감지용 능동형 데이터로거 시스템 연구)

  • Lee, Seong-Won
    • Proceedings of the KSR Conference
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    • pp.470-475
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    • 2011
  • The objective of this study is the developement health & disaster monitoring measurement using ubiquitous active communication digital datalogger system for monitoring measurement of railway construction sites. For the replacement of current passive data communication, ubiquitous active communication digital datalogger system is studied for the first time with in a country. Therefore data communication method and analyzing program of automatic measurement data is developed for the global positioning automatic digital datalogger system. The results of this study will be using both real time automatic monitoring measurement and health & disaster monitoring measurement of railway structures.

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A Study of Monitoring Measurement using Global Positioning Digital Datalogger System for Railway Structures (GPS를 내장한 위치추적 데이터로거 시스템의 철도 계측 적용성 연구)

  • Lee, Seong-Won
    • Proceedings of the KSR Conference
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    • pp.2002-2007
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    • 2010
  • The objective of this study is the developement monitoring measurement using global positioning digital datalogger system for monitoring measurement of railway construction sites. For the replacement of current passive data communication, Global positioning digital datalogger system using active communication is studied for the first time with in a country. Therefore data communication method and analyzing program of automatic measurement data is developed for the global positioning automatic digital datalogger system. The results of this study will be using real time automatic monitoring measurement of railway structures.

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Distance Measurement System using A Stereo Camera and Radial Pattern Target for Automatic Berthing Control

  • Mizuchi, Yoshiaki;Ogura, Tadashi;Hagiwara, Yoshinobu;Suzuki, Akimasa;Kim, Youngbok;Choi, Yongwoon
    • Journal of Power System Engineering
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    • v.17 no.5
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    • pp.121-127
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    • 2013
  • In this paper, we propose a distance measurement system for automatic berthing control using a stereo camera mounted on a rotation control device, and a radial pattern target. Automatically controlling the position and attitude of a ship aims to prevent maritime accidents due to human error. Our goal is to measure the relative distance between a ship and an onshore or offshore target for berthing. Therefore, the distance should be continuously measured while tracking a fixed point on a target. To this end, we developed a stereo camerabased distance measurement system that satisfied these requirements. This paper describes the structure and principle of the measurement system. We validate the distance error for target incline due to the relative position and attitude between a camera and a target in miniature scale. In addition, the findings of an experiment in an outdoor environment demonstrate that the proposed measurement system has accuracy within 1 m at a range of 20-100 m which is the acceptable accuracy for automatic berthing.

A Study on the Measurement Methods of Plastic Strain Ratio in Automotive sheet steel (자동차용 강판의 소성변형비 측정 방법 연구)

  • 김인수;김인수
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.85-92
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    • 1996
  • The Measurement method of the plastic strain ratio is various in Automotive sheet steel. In this paper, the measurement of the plastic strain are used two different methods, ASTM E 517 method and the automatic strain measurement tensile specimen during the tensile test, and compared the plastic strain ratios from the two methods. The experimental results showed that the measured plastic strain ratios from the automatic strain measurement method are coincide with that from the ASTM E 517 standard measurement in various specimens. Therefore, automatic strain measurement method by two extensometers shows good accuracy. Also, the strain dependance of plastic strain ratios could be recorded by the computer continuously and anisotropy of the strength coefficient, K, and strain hardening exponent, n ,could be compared with each direction automatically through the use of automatic strain measurement system.

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Development of an automatic measurement system for the AC-DC current transfer difference of the thermal current converter (열전형 전류 변환기의 교류-직류 전류 변환차이 자동측정시스템 개발)

  • Kwon, Sung-Won;Jung, Jae-Kap;Kim, Mun-Seog;Kim, Kye-Tae;Ryu, Je-Cheon
    • Journal of Sensor Science and Technology
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    • v.14 no.5
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    • pp.350-356
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    • 2005
  • We have developed a dual-channel type automatic measurement system to evaluate AC-DC current transfer difference of the thermal current converter(TCC) which is primary standard of AC current. The output drift effect of the TCC is minimized by measuring simultaneously the output voltages of two TCCs using voltmeter. Furthermore, the offset voltage of the voltmeter is cancelled nearly out by taking the average values of two outputs of TCCs measured with the forward-reverse directions using dual channel scanner. The uncertainties of the automatic system were 7 to $86{\mu}A/A$ for 3 mA to 10 A at 40 Hz to 20 kHz, which were evaluated by the comparisons between adjacent range of TCCs and inter-comparison with national measurement institute of Germany(PTB). The capability for ac-dc transfer difference measurement was improved by one order compared with that for the manual ac-dc measurement system.

A Study of Automatic Measurement using Bluetooth Modem for Railway structures (블루투스 통신모뎀을 이용한 철도구조물의 자동계측에 관한 연구)

  • Lee, Seong-Won;Lee, Keun-Ho;Chung, Jae-Min
    • Proceedings of the KSR Conference
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    • pp.316-321
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    • 2006
  • The objective of this study is the developement of real time automatic datalogger using bluetooth modem for safety and maintence of civil construction sites. Automatic measurement system using general wireless modem is studied, and data communication method of between personal computer(or Server) and automatic measurement data is analyzed. Therefore data communication method and analyzing program of automatic measurement data is developed using real time automatic datalogger with bluetooth modem. The results of this study will be using real time automatic measurement of civil construction sites

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A Study on the Automatic Level Measurement for Land Leveling (경지 균평 작업을 위한 자동 표고 측정에 관한 연구)

  • 김종안;김수현;곽윤근
    • Journal of Biosystems Engineering
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    • v.22 no.3
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    • pp.269-278
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    • 1997
  • An automatic level measurement system was developed to level the land fer direct seeding of rice. A laser transmitter/receiver set was used to measure land-level. The inclination error occurred in level measurement on irregular land surface could be compensated by attaching rotating mass. The level measuring experiments were performed on three kinds of different shapes(step, random, sine). This system could accurately measure step level of which amplitude was 40mm in 0.5s, random level change within $\pm$ 5mm maximum measurement error, and sine level change of which spatial frequency was 0.5m-1. To verify performance of the inclination error compensation system, frequency transfer function(acceleration input vs. inclination error) was computed by spectral analysis. The inclination error was decreased about 20㏈ by error compensation system.

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