• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 2002년도 춘계학술대회 논문집
• /
• pp.100-105
• /
• 2002

In general, manufacturing error originated in bad material, machine tool defection, tool defection, and tool breakage. When the manufacturing process is stable, the error is come from the tool wear. In common on-machine measurement, teaching probe and touch sensor are widely used, however in this thesis the automatic tool compensation system using electric touch point measuring system is developed and evaluated, and effective operating is proposed.

• 한국공작기계학회논문집
• /
• 제11권5호
• /
• pp.93-99
• /
• 2002

In general, manufacturing error is originated from bad material, machine tool defection and tool breakage. When the manufacturing process is stable, the most of error come from the tool wear. In common on-machine measurement teaching probe and touch sensor are widely used however in this paper the electric touch point type automatic tool compensation system is developed the performance of it is validated and effective operating is proposed.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2010년도 추계학술대회
• /
• pp.215-217
• /
• 2010

This paper describes the test results of radiated compatibility with Ariane 5 launcher performed on the COMS Satellite test facility. Firstly, the Radiated Emission test results are analyzed in compliance with the Radiated Susceptibility requirement specification of Ariane 5 launcher. The satellite nominal operation is monitored during injection a radiated electric field corresponding to the launcher emissions levels in critical frequency ranges. And also, E-field are measured through a probe located at external units level in order to assess the EMC safety margin in Radiated mode.

• 한국지반환경공학회 논문집
• /
• 제12권1호
• /
• pp.51-60
• /
• 2011

전기비저항은 지층의 자세한 이해와 지반의 기본 물성치 획득을 위하여 다양한 측정 장비에 적용되고 있다. 본 연구의 목적은 프로브가 관입되는 동안 온도가 전기비저항에 미치는 영향을 상쇄시켜 보다 정밀한 전기비저항을 평가할 수 있는 온도보상형 전기비저항 프로브(TRP)를 개발하고 적용하는 것이다. 전기비저항 콘의 직경에 따른 온도변화를 분석하기 위하여 두가지 직경(2mm, 5mm)의 콘을 제작하였다. 온도 센서는 전기비저항 프로브와의 전기적 간섭현상을 고려하여 선단부에서 15mm 떨어진 곳에 부착하였다. 또한 모터식 관입기와 전기비저항 프로브 사이의 전기적 교란을 막기 위하여 절연 커넥터를 이용하였다. 직경 30cm의 아크릴 수조에 주문진사를 수중강사법으로 시료를 조성하고 타격에 의해 상대밀도를 증가시키면서 실험을 진행하였다. 실험결과, 관입되는 동안 프로브의 온도가 증가하였으며, 정확한 전기비저항 프로파일을 산정하기 위하여 온도보정이 필요한 것으로 나타났다. 본 연구에서는 온도보상형 전기비저항 프로브(TRP)를 개발하고, 이를 관입실험에 적용하여 정확한 지반조사를 수행하기 위해서는 온도에 대한 영향 및 관입특성을 고려해야 함을 보여준다.

• Tribology and Lubricants
• /
• 제3권1호
• /
• pp.47-51
• /
• 1987

The purpose of this paper is to study the lubrication characteristics which is occured in contact surface of two meterials. In this study, experimental apparatus which was modelling of the Cold rolling was used. Electric resistance, the temperature variation and the friction coefficient, between Disk and Roller were measured by respectively electric circuit system, temperature probe, and strain gauge. The experiment carried on the disk velocity range of 10m/min to 1000m/min in loading weight 2kg to 18kg.

• 한국안광학회지
• /
• 제4권1호
• /
• pp.15-20
• /
• 1999

상용전원을 사용한 평행판전극 방전장치에서 수소플라스마로부터 방사되는 가시광선의 스펙트럼을 분광기로 조사하였다. 기체압력과 방전전력에 따라 수소플라스마로부터 방사되는 가시광선의 세기를 조사하고, 같은 조건에서 탐침으로 플라스마밀도를 측정하여 가시광선의 세기와 비교하였다. 측정결과, 가시광선의 세기는 플라스마의 밀도에 영향을 받으며, 플라스마 밀도는 기체압력과 방전전력에 영향받았다.

• 대한전기학회논문지:전기물성ㆍ응용부문C
• /
• 제53권3호
• /
• pp.133-136
• /
• 2004

Low-Pressure inductively coupled RF discharge sources have important industrial applications mainly because they can provide a high-density electrodeless plasma source with low ion energy and low power loss. In an inductive discharge, the RF power is coupled to the plasma by an electromagnetic interaction with the current flowing in a coil. In this paper, the experiments have been focussed on the electric characteristic and carried out using a single Langmuir probe. The internal electric characteristics of inductively coupled Ar RF discharge at 13.56(MHz) have been measured over a wide range of power at gas pressure ranging from 1∼70(mTorr).

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2001년도 춘계학술대회 논문집
• /
• pp.445-449
• /
• 2001

The tool wear that is developed by long-term machining in mold manufacturing with machining center makes a severe influence to the accuracy and the surface roughness. In this reason, tool-wear supervising system which has guaranteed high accuracy and high speed is needed to improve the measurement quality. Touching probe and touch sensor are widely used to measure the tool profile at on-machine measurement. In this paper, using the newly developed electric touch point measuring system, the Automatic Tool Compensation System is developed to correct the error of tool diameter resulted from the wear, and the operating method of this system is also provided.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2003년도 하계학술대회 논문집 C
• /
• pp.1704-1706
• /
• 2003

Low-Pressure inductively coupled RF discharge sources have important industrial applications mainly because they can provide a high-density electrodeless plasma source with low ion energy and low power loss. In an inductive discharge, the RF power is coupled to the plasma by an electromagnetic interaction with the current flowing in a coil. In this paper, the experiments have been focussed on the electric characteristic and carried out using a single Langmuir probe. The internal electric characteristics of inductively coupled Ar RF discharge at 13.56 [MHz] have been measured over a wide range of power at gas pressure ranging from $1{\sim}70$ [mTorr].

• Advances in materials Research
• /
• 제2권4호
• /
• pp.209-219
• /
• 2013

We have described primary studies on conductivity and molecular weight of polyaniline separately in the electric and magnetic fields when it is used in a field effect experimental configuration. We report further studies on doped in-situ deposited polyaniline. First we have chemically synthesized polyaniline by ammonium peroxodisulfate in acidic aques and organic solutions at different times. Then we measured mass and conductivity and obtained the best time of polymerizations. In continue, we repeated these reactions separately under different electric and magnetic fields in constant time and measured mass and conductivity. The polyaniline is characterized by gel permeation chromatography (GPC), UV-Visible spectroscopy and electrical conductivity. High molecular weight polyanilines are synthesized under electric field, $M_w$ = 520000-680000 g/mol, with $M_w/M_n$ = 2-2.5. The UV-Visible spectra of polyanilines oxidized by ammonium peroxodisulfate and protonated with dodecylbenzenesulfonic acid (PANi-DBSA), in N-methylpyrolidone (NMP), show a smeared polaron peak shifted into the visible. Electrical conductivity of polyanilines has been studied by four-probe method. The conductivity of the films of emeraldine protonated by DBSA cast from NMP are higher than 500 and 25 S/cm under 10 KV/m of potential) electric field and 0.1 T magnetic field, respectively. It shows an enhanced resistance to ageing too. By the next steps, we carried chemical polymerization at the best electric and magnetic fields at different times. Finally, resulted in finding the best time and amount of the fields. The longer polymerization time and the higher magnetic field can lead to degradation of polyaniline films and decrease conductivity and molecular mass.