• Title/Summary/Keyword: Measuring dimension

Search Result 316, Processing Time 0.03 seconds

A system measuring the functional dimension of the hand and arm (손/팔의 기능적 치수 측정시스템)

  • 이경태;강신길;박재희
    • Proceedings of the ESK Conference
    • /
    • 1996.10a
    • /
    • pp.219-224
    • /
    • 1996
  • By integrating the wired-glove and the position sensor using the magnetic fields, we developed the system which could measure the functional dimension of the hand and arm of the human. Magnetic position sensor traces the position and orientation of the arm while the wired-glove measures 18 phalangeal joint angles(including abduction between fingers, pitch and yaw of the wiist). The system could be used to monitor and quantify the functional dimension of the hand and arm and also could be used to test the product usability where the hand motion is important. Another important application lies in determining the degree of paralysis.

  • PDF

Flexible 3-dimension measuring system using robot hand

  • Ishimatsu, T.;Yasuda, K.;Kumon, K.;Matsui, R.
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 1989.10a
    • /
    • pp.700-704
    • /
    • 1989
  • A robotic system with a 3-dimensional profile measuring sensor is developed in order to measure the complicated shape of the target body. Due to this 3-dimensional profile measuring sensor, a computer is able to adjust the posture of the robot hand so that complicated global profile of the target body can be recognized after several measurements from the variant directions. In order to enable fast data processing, a digital signal processor and a look-up table is introduced.

  • PDF

A Study on the System of the Precision Dimensional Measurements for Molded Product Carbon Materials (탄소재 성형품에 대한 정밀 치수 검사 시스템에 관한 연구)

  • Kim, Dae-Nyeon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.30 no.2
    • /
    • pp.37-42
    • /
    • 2016
  • This paper proposes a method to develop a high-precision dimension measurement system using a linear variable differential transformer sensor. The Dimension targets for measurement is carbon material vanes of key element in the rotating parts within vehicle circulating pump. Data acquisition system for dimension measurement is designed using the NI Compact RIO. And the program applying the dimension measurement algorithm is built using NI LabVIEW. The dimension measuring program is composed of a FPGA program, Real Time program and Host program. The method of the experiment compares master vane with target vane for measure the length of the carbon material vane. The experimental results confirmed the usefulness of the accuracy within ${\pm}4um$.

Surface Roughness Characterization of Rock Masses Using the Fractal Dimension and the Variogram (Fractal 차원과 Variogram을 이용한 암반 불연속면의 굴곡도 특성 서술)

  • Lee, Young-Hoon
    • Economic and Environmental Geology
    • /
    • v.27 no.1
    • /
    • pp.81-91
    • /
    • 1994
  • There has been considerable research dealing with the influence of surface roughness along surfaces of rock discontinuities in relation to the peak shear strength of rock masses. Concepts accepted recently for measuring such strength include estimation of a roughness coefficient such as developed by Barton's studies. The method for estimation the Joint Roughness Coefficient (JRC) value of a measured roughness profile is subjective. The aim of this research is to estimate the JRC value of the roughness of a surface profile in a rock mass system using an objective method. The study of roughness of surfaces has included measurement of fractal geometric characteristics. Once the irregularity of the surface has been described by the fractal dimension, the spatial variation of the surface irregularities can be described using variogram and drift analysis. An empirical relationships between the roughness profiles of selected JRC ranges and their fractal dimension with variogram and drift were derived. The application of analyses of fractal dimension, variogram and drift was novel for the analysis of roughness profiles. Also, an empirical equation was applied to experimental data.

  • PDF

Statistical Characteristics of Response Consistency Parameters in Analytic Hierarchy Process (AHP에서의 응답일관성 모수의 통계적 특성과 활용 방안)

  • 고길곤;이경전
    • Journal of the Korean Operations Research and Management Science Society
    • /
    • v.26 no.4
    • /
    • pp.71-82
    • /
    • 2001
  • Using the computer simulation method, we invest19ate the probability distribution of maximum eigenvalue of pair-wise comparison matrix, which has been used as a parameter for measuring the consistency of responses in analytic hierarchy process (AHP). We show that the shape of the distribution of the maximum eigenvalue is different according to the dimension of the matrix. In addition, we cannot find any evidence that the distribution of the Consistency Index is a Normal distribution, which has been claimed in the Previous literature. Accordingly, we suggest using so called K-index calcu1ated based on the concept of cumulative distribution function lather than based on that of arithmetic mean because the probabilistic distribution cannot be assumed to be a Normal distribution. We interpret the simulation results by comparing them with the suggestion of Saaty[11]. Our results show that using Saaty's value could be too generous when the dimension of the matrix is 3 and strict over 4. Finally, we propose new criteria for measuring the response consistency in AHP.

  • PDF

Construction of Chaos Simulator for Cutting Characteristics Evaluation of Non-Ferrous Metals (비철금속의 절삭성 평가를 위한 카오스 시뮬레이터의 구축)

  • 이종대;윤인식
    • Journal of the Korean Society of Safety
    • /
    • v.18 no.3
    • /
    • pp.22-28
    • /
    • 2003
  • This study proposes the construction of chaos simulator for cutting characteristics evaluation of non-ferrous metals. Also this paper aims to find the optimal cutting conditions of diamond turning machine by measuring surface form and roughness to perform the cutting experiment of non-ferrous metals, which are aluminum, with diamond tool. As well, according to change cutting conditions such as fled rate, using diamond turning machine to perform cutting processing, by measuring cutting force and surface roughness and according to cutting conditions the aluminum about cutting properties. Trajectory changes in the attractor indicated a substantial difference in fractal characteristics. Constructed chaos simulator in this study can be used for cutting characteristics evaluation of non-ferrous metals.

Development of 2-Dimension Radar Distance Measurement System with 24 GHz Antenna Module and Its Performance Evaluation (24 GHz 안테나 모듈을 이용한 2차원 레이더 거리 측정 시스템 개발 및 성능 평가)

  • Go, Seok-Jo;Kim, Tae-Hoon;Cha, Byung-Soo;Park, Min-Kyu;Moon, Young-Gun;Yu, Ki-Ho
    • Journal of the Korean Society of Industry Convergence
    • /
    • v.19 no.2
    • /
    • pp.62-68
    • /
    • 2016
  • Laser distance measuring systems are used in many fields with high precision. However, when measuring the reflector such as the mirror and the black color, a laser distance measuring system does not guarantee the measurement accuracy. In order to measure the shape of the cargo, this study proposes the radar distance measurement system. The radar distance measuring system is composed of a distance measuring unit with a 24 GHz antenna module, a signal processing and control board and the 1-axis tilting unit. And, this study developed a monitoring program to monitor the measured data. In order to evaluate performance of the developed system, the distance measurement tests are carried out. The distance error was about 6-15 cm. However, considering the size of the cargo, the precision is not a problem. And, cargo shape was measured by using the distance information measured by the 1-axis tilting unit. It could get a 2 dimension shape profile for the cargo stacked in a yard.

The Error Source Analysis of Measuring Data of OMM System (OMM 시스템의 측정오차 원인분석 및 대책)

  • 이상준;김선호;김옥현
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 1997.04a
    • /
    • pp.73-77
    • /
    • 1997
  • This paper describes the analysis of measuring error of on the machine measuring(OMM) system which can directly measure the three dimensional machined free surface dimension using scanning probe on milling machine. 21 inch TV shadow mask mould was measured using PTP(point to point)measurement algorithm at pallet clamped and unclamped state on OMM system, and using coordinate measuring machine(CMM) one after another. The OMM system was evaluated probe error, stylus contact error, center shift error, repeatability and so on. Consequencely, the conclusion derived that elastic displacement of pallet had effect on measuring error mainly, and pallet design and setup method would be important.

  • PDF

Influence of Evaluation Methods for Fatigue Crack Growth Process (피로균열 성장과정에 대한 평가방법의 영향)

  • 안철봉
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.8 no.1
    • /
    • pp.119-125
    • /
    • 1999
  • The distribution of fatigue crack growth rate is subjected to the measuring interval and calculated method of growth rate. In this paper, in order to establish the method of determining the distribution of fatigue crack growth rate, which ignores those influences, a series of fatigue crack growth experiments and measuring intervals of crack length calculated reasonable are presented. The main conclusions obtained are summarized as follows: 1) As a result of the ΔP constant test and ΔK constant test, it is thought that an approximate measuring interval of 0.3~0.7mm is reasonable, which allows for few errors and is little subjected to the calculated method of crack growth rate. 2) After generally comparing the error estimation by using the experimental data of CCT specimen with the error rating of the CT specimens, it is possible that the fatigue test has few errors within the measuring interval, ξ(Δa/W)=0.0067~0.017, regardless of the dimension of specimen geometry.

  • PDF

Development of an OLAP Database System for SME Growth Support -Centering around the Small Business Policy Funds Support Project- (중소기업성장지원 OLAP 데이터베이스 시스템 구축 - 중소기업 정책금융지원 사업을 중심으로-)

  • Hwang, Man-Mo;Choi, In-Soo
    • Journal of the Korea Society of Computer and Information
    • /
    • v.17 no.5
    • /
    • pp.157-167
    • /
    • 2012
  • The purpose of this paper is to develop an OLAP (online analytical processing) database system that supports the SMBA (Small and medium Business Administration) policy funding. A heterogeneous dimension schema will be central in staged support of policy funds. In this paper, therefore, we designed the FREQUENCY dimension table which has a heterogeneous dimension schema structure. In this paper, we made a model of measuring SME (small and medium-sized enterprise) size first. The model is composed of six determinants of firm growth such as sales, employment, own technology, the operating profit to sales ratio, the debt ratio, and the current ratio. We developed the OLAP database system by using three dimensions including the FREQUENCY dimension, and using the model of measuring SME size. Also we assessed past decisions on policy funding in the Small Business Policy Funds Support Project (2004-2007) by using the OLAP database system.