• 품질경영학회지
• /
• 제47권4호
• /
• pp.713-723
• /
• 2019

Purpose: The purpose of this study is to develop a statistical program for capability analysis of measuring system and measurement process based upon KS Q ISO 22514-7. Methods: R is a powerful open source functional programming language that provides high level graphics and interfaces to other languages. Therefore, in this study, we will develop the statistical program using R language. Results: The R program developed in this study consists of the following five modules. ① Measuring system capability analysis with Type 1 study data: MSCA_Type1.R ② Measuring system capability analysis with Linearity study(Type 4 study) data: MSCA_Type4.R ③ Measurement process capability analysis with Type 1 study & Gage R&R study data: MPCA_T1GRR.R ④ Measurement process capability analysis with Type 4 study & Gage R&R study data: MPCA_T4GRR.R ⑤ Attribute measurement processes capability analysis : AttributeMP.R Conclusion: KS Q ISO 22514-7 evaluates measuring systems and measurement processes on the basis of the measurement uncertainty that was determined according to the GUM(KS Q ISO/IEC Guide 98-3). KS Q ISO 22514-7 offers precise procedures, however, computations are more intensive. The R program of this study will help to evaluate the measurement process.

• Korean Journal of Acupuncture
• /
• 제25권3호
• /
• pp.15-27
• /
• 2008

Objectives : The objective of the current study is to optimize an acupoint electrical property measurement system by using the procedures and strengths of the Taguchi method. Methods : Taguchi method was applied in the optimization of the acupoint electrical property measurement system, as in the following steps: (1) determine evaluation index; (2) execute the 1st gage R&R; (3) identify controllable and uncontrollable factors; (4) design Taguchi crossed array layout; (5) execute experiments according to trial conditions; (6) analyze testing results; (7) determine optimum run; (8) execute the 2nd gage R&R; (9) confirm optimum run. Results : The results showed that electrodes with larger diameter and efferent electric current, with music played, can produce the larger different electrical conductivity between the acupoints and the non-acupoints under various conditions. Taguchi process optimization improved repeatability and reproducibility of the acupoint electrical property measurement system. Conclusions : In the optimized condition, repeatability and reproducibility of the acupoint electrical property measurement system was acceptable.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2010년도 춘계학술대회 논문집
• /
• pp.115-116
• /
• 2010

• 대한화장품학회지
• /
• 제34권4호
• /
• pp.333-338
• /
• 2008

PRIMOS $body^{(R)}$ 기기를 이용한 얼굴부피 평가법 개발에 관한 연구를 진행하였다. 평가법의 신뢰성을 확인하고자 세 명의 시험자가 마네킹과 사람을 대상으로 얼굴 부피를 측정하였다. 마네킹의 얼굴에 여러 가지 부피의 찰흙을 붙이고, 기기로 얼굴을 측정하였는데, 실제 찰흙의 부피와 측정값 사이에 높은 상관성($R^2=0.99$)이 있는 것으로 나타났다.% RSD와 Gage R&R 분석으로 기기의 정확성, 반복성, 재현성을 확인한 결과 신뢰성이 있는 결과를 얻었다. 이와 같은 평가법을 얼굴 붓기 감소에 영향을 주는 화장품의 효능을 평가하는데 적용하였다. 10명의 건강한 여성을 대상으로 화장품 사용 전후 얼굴의 부피를 측정한 결과, 얼굴의 부피가 감소하는 것으로 나타났다. 이와 같은 결과를 통해 PRIMOS $body^{(R)}$를 이용한 얼굴 부피 평가법은 인체평가에 유용하게 사용될 수 있을 것으로 보인다.

• 한국가스학회지
• /
• 제7권3호
• /
• pp.13-17
• /
• 2003

LNG 저장탱크의 주요 구조인 멤브레인은 LNG 누설을 방지하기 위하여 설계되었다. 멤브레인 유닛은 $-162^{\circ}C$의 액화시킨 LNG의 접촉에 따라 발생하는 가스압, 액압, 그리고 열하중을 지지하도록 설계되므로 멤브레인 구조의 강도를 실험적 방법을 이용하여 측정하는 것이 매우 중요하다. 본 논문에서는 상용 전기저항식 스트레인 게이지와 자체적으로 제작한 기계적 열 변형 측정 장치를 이용한 변형 측정 시스템을 제안하였다.

• 대한한의진단학회지
• /
• 제15권2호
• /
• pp.203-214
• /
• 2011

Objectives: The objective of the current study is to determine whether an ultrasound device system is adequate for measuring distance from the abdominal surface of Sangwan (CV13) to peritoneum in front of anterior surface of liver. Methods: We recruited 3 healthy young male subjects and 2 sonographers. The each sonographer measured vertical shortest distance from the abdominal surface of Sangwan (CV13) to peritoneum in front of anterior surface of liver with a ultrasound device with three methods of 3.5 MHz convex probe and gel, 9 MHz linear probe and gel, and 9 MHz linear probe and solid gel pad, three times in random order. Because the total variation could be divided into repeatability, reproducibility and subject-to-subject variation in Gage R&R method, we compared the sources of variation associated with the measurement system with an analysis of variance model. Results & Conclusions: Number of distinct categories is calculated on the basis of standard deviation of subject-to-subject divided by standard deviation of total Gage R&R. If the number of categories is five or more, the measurement system may be acceptable for the analysis of the process. The number of distinct categories of the ultrasound device system for measuring distance from the abdominal surface of Sangwan (CV13) to peritoneum in front of anterior surface of liver were 9.20 (9 MHz linear probe and gel), 14.70 (9 MHz linear probe and solid gel pad). So we concluded that repeatabilities and reproducibilities of the ultrasound device system for measuring distance from the abdominal surface of Sangwan (CV13) to peritoneum in front of anterior surface of liver with the methods of 9 MHz linear probe and gel, and 9 MHz linear probe and solid gel pad were acceptable.

• Advances in Traditional Medicine
• /
• 제9권1호
• /
• pp.14-19
• /
• 2009

The aim of this study is to evaluate appraiser's consistency and accuracy about pulse diagnosis (PD) in discrimination of eight-constitutions using Gage R&R study. Cumulative numbers of PD for discrimination of eight constitutions of three appraisers' experience were 75,000 cases, 50,000 cases, 1,100 cases, respectively. Three Appraisers diagnosed subject's eight-constitutions by PD with blinded method. Gage R&R study was used to verify the results. In the measurements of consistency, appraiser B (agreement = 80%, Value of k = 0.8276) was very good, appraiser A (agreement = 70%, Value of k = 0.7465) was good, and appraiser C (agreement = 50%, Value of k = 0.5365) was moderate. In the measurements of accuracy, appraiser B (agreement = 70%, Value of k = 0.6812) was good, appraiser A (agreement = 60%, Value of k = 0.6414) was good, and appraiser C (agreement = 0%, Value of k = -0.1000) was poor. The results suggest that accuracy of discrimination of constitutions relatively depend on experience and number of cases of PD. Further large controlled study is needed to evaluate the accuracy of PD.

• 품질경영학회지
• /
• 제28권1호
• /
• pp.175-195
• /
• 2000

In this study, we developed a statistical software for measurement systems analysis. This software is patterned after the Measurement Systems Analysis Reference Manual developed by the Automotive Industry Action Group (AIAG). This software includes stability analysis, bias and linearity analysis, and gage R&R studies. This software was developed by using Delphi(version 4.0) and can be implemented on MS Windows 95 or higher level.

• 대한기계학회논문집
• /
• 제14권6호
• /
• pp.1576-1582
• /
• 1990

본 연구에서는 Al 2024-T3 판으로 제작된 한면 노치 시편에 여러 조건의 피로 하중을 가하여 노치면내에 형성된 미소 피로균열의 COD를 광학적 간섭현상에 기초를 둔 미소 변위측정기(Interferometric Strain/Displacement Gage`ISDG)를 개량하여 측 정하였다. 이 ISDG의 컴퓨터 조정방식을 정밀화시켜 0.02$\mu\textrm{m}$까지의 상대변위를 측정 할 수 있도록 보완하였다. 고정밀화돈 측정기로 수십 $\mu\textrm{m}$길이의 미소균열의 COD도 측 정하였고 컴류터에 저장시킴으로써 시험후 미소 피로균열에 대한 열림 특성을 분석할 수 있다. 측정된 미소 피로균열의 균열열림특성을 고찰하고 긴 균열의 열림특성과도 비교.분석 하였다.

• 한국기계가공학회지
• /
• 제14권4호
• /
• pp.151-159
• /
• 2015

In this study, we developed an automated contact-type thickness measurement machine that continuously and precisely measures the thickness of a PCB module product using multi-LVDT sensors. The system contains a measurement part to automatically measure the thickness in real time according to the set conditions with an alignment supply unit and unloading unit to separate OK and NG products. The sensors were calibrated before assembly in the measuring machine, and precision and accuracy performance tests were also performed to reduce uncertainty errors in the measurement machine. In the calibration test, the precision errors of the LVDT sensor were determined to be $1-3{\mu}m$ as 0.1% at the measuring range. A measurement error of 0.8 mm and 1.0 mm thickness test standards were found to be $1{\mu}m$ and $4{\mu}m$, and the standard deviations of two 1.0 mm products were measured as $14{\mu}m$ and $8{\mu}m$, respectively. In the measurement system analysis, the accuracies of test PCB standards were found to be $2{\mu}m$ and $3{\mu}m$, respectively. From the results of gage repeatability and reproducibility (R & R) crossed, we found that the machine is suitable for the measurement and process control in the mass production line as 7.92% of total gage R & R and in seven distinct categories. The maximum operating speed was limited at 13 pcs/min, showing a value good enough to measure.