• Title/Summary/Keyword: 역반사계

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A Measurement Method to Compromise Surface Error in Machined Workpieces (평면 오차 보정 가공을 위한 측정 방법에 관한 연구)

  • 장문주;홍성욱;박천홍
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.409-412
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    • 2002
  • This paper presents a measurement method to compromise surface error in surface machining processes. In order to compromise the surface error in machining process, on-machine measurement is essential. There are two kinds of on-machine measurement methods available to measure the surface errors in flat workpieces: i.e., surface scanning method and sensor scanning method. However, motion errors are inevitably engaged in both methods. This paper proposes a new idea to measure the surface error for error compensation. The measurement system consists of a laser, a CCD camera and processing system, a carrier system with a stylus, and some optical units. The experimental results show that the proposed method is useful to compensate the surface errors of machined workpieces.

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Development of straightness measurement system for flat workpiece (평면 공작물의 진직도 측정 시스템 개발)

  • 김현수;조명동;장문주;홍성욱;박천홍
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.203-206
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    • 2001
  • This paper presents a straightness measurement system for flat and long workpieces. The measurement system consists of a laser optical unit, a CCD camera and processing system, and a carrier system with a stylus. The carrier system accompanies the stylus, which displaces a retroreflector along the surface profile. The optical unit is used to optically amplify the displacement of retroreflector. The CCD camera and processing system finally identifies the vertical displacement of the stylus unit. The developed system is applied to two surfaces: ground surface and LM guide surface. The experimental results show that the developed system can measure the straightness of flat surfaces within sub-micron error.

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Development of Straightness Measurement System thor Flat Workpieces (평면 공작물 진직도 측정 시스템 개발에 관한 연구)

  • Kim, Hyeon-Su;Jang, Mun-Ju;Hong, Seong-Uk;Park, Cheon-Hong
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.3
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    • pp.107-113
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    • 2002
  • This paper presents a straightness measurement system for flat and long workpieces. The measurement system consists of a laser, a CCD camera and processing system, a carrier system with a stylus, and some optical units. The carrier system accompanies the stylus, which displaces and retroreflector along the surface profile. The optical unit is used to optically amplify displacement of the stylus unit. The developed system is applied to a ground surface and a LM guide unit. The experimental results show that the developed system can measure the straightness of flat surface and moving systems.

Development of a 4-axis Auto-aligning System for Precision Measurement of 2-axis Feeding Systems Using Laser Interferometer (2축 이송계 정밀도 측정을 위한 레이저 간섭계 4축 자동정렬장치 개발)

  • Kim, Hyun-Soo;Hong, Seong-Wook
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.9
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    • pp.75-80
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    • 2000
  • Although laser interferometer is widely accepted as a tool for measurement of motion accuracy the set-up procedure is time-consuming because of the strict requirement on alignment between laser head and optic units. This paper presents a 4-axis auto-aligning system which is useful for easy set-up of laser interferometer so as to evaluate precision of a 2-axis feeding system. This paper proposes two ideas for alignment in laser interferometer set-up: one is use of mirror and retroreflectors. and the other is taking advantage of the pre-defined movement and peculiar characteristic of retroreflecotrs. The pros and cons of the two methods are discussed. Illustrative experimental results are presented in which the developed system is applied to a XY table.

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Development of On-machine Flatness Measurement Method (평면도 기상 측정 방법 개발)

  • 장문주;홍성욱
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.3
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    • pp.187-193
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    • 2003
  • This paper presents an on-machine measurement method of flatness error fur surface machining processes. There are two kinds of on-machine measurement methods available to measure flatness errors in workpieces: i.e., surface scanning method and sensor scanning method. However, motion errors are often engaged in both methods. This paper proposes an idea to realize a measurement system of flatness errors and its rigorous application for estimation of motion errors of the positioning system. The measurement system is made by modifying the straightness measurement system, which consists of a laser, a CCD camera and processing system, a sensor head, and some optical units. The sensor head is composed of a retroreflector, a ball and ball socket, a linear motion guide unit and adjustable arms. The experimental .results show that the proposed method is useful to identify flatness errors of machined workpieces as well as motion errors of positioning systems.