• Title/Summary/Keyword: digital factory

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System Development for Automatic Tool Wear Measurement (자종공무마모계측시스템개발)

  • Kim, Y.I.
    • Journal of the Korean Society for Precision Engineering
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    • v.11 no.6
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    • pp.185-199
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    • 1994
  • This study has been performed to present a new automatic tool wear measurement by digital image processing. The purpose of this paper is to develop an automatic tool wear measuring system based on the image processing which can be applied to the quasi-real time measurement of the characteristics of insert tip in turning. Tool wear monitoring is one of the key-problems, for the development of control systems of modern unmanned factory which are not completely solved now. In oredr words at present complete qualitative and quantitative information on tool wear morphology is required, at least on the following aspects : flank wear, its dimensions and distribution on the maximum and mean values on VB pqrqmeter in the various zones of the wearland. crater wear, its main dimensions and values of KT parameters. This research has been performed to this technique made possible by designing a proper lighting system to the worn tool with following features : The flank wear is measured by observing the active cutting part from a proper direction and by lighting the wearland by a diffuser optic system. The crater wear is visualized by lighting the tool by a He-Ne gas laser system developed in this study. By means of this system it is research to evaluate classical parameters of tool wear and to have complete information about tool wear morphology.

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An Implementation of High-precision Three-phase Linear Absolute Position Sensor (고정도 3상 직선형 절대 위치 센서의 구현)

  • Lee, Chang Su
    • Journal of IKEEE
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    • v.19 no.3
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    • pp.335-341
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    • 2015
  • Recently a demand for high precision absolute position transducer is increasing in order to control thickness in steel industry. LVDT (linear variable differential transformer) is widely used to measure the absolute position in the linearly moving cylinder under poor factory environment. In this paper we implement the three phase LVDT with a high resolution of one micron and L/D (LVDT to digital) converter. First we designed U, V, and W three phase signaling using FPGA. Second a pulse output algorithm is designed for position information with A and B phase waveforms. Finally the performance is compared with previous sensors. Experiments show that the linearity deviation error is 0.009788 [mm] and the average sinusoidal THD is 0.0751%, which means 2.2% and 33% more improved result than the previous sensors respectively.

Implementation and Performance Valuation of SWT Builder Using GroovyMarkup Extension (GroovyMarkup 확장을 이용한 SWT Builder의 구현 및 성능 평가)

  • Lee, Gun-Woo;Go, Dong-Jin;Lee, Dong-Ju;Woo, Gyun;Kim, Won-Young;Choi, Wan
    • Proceedings of the Korean Information Science Society Conference
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    • 2006.10b
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    • pp.600-603
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    • 2006
  • Java 플랫폼 기반의 스크립트 언어인 Groovy는 GroovyMarkup을 이용하여 컴포넌트 및 콘테이너, 객체가 중첩된 구조로 이루어져 있는 GUI 프로그램을 간결하고 쉽게 작성할 수 있다. 본 논문에서는 GroovyMarkup을 확장해 고성능의 GUI 프로그램을 구현할 수 있는 SWT Builder를 구현하였다. 본 논문에서 구현한 SWT Builder의 성능 및 기능 평가를 위해 기존에 구현된 SWT Builder, Swing Builder와 비교하여 실험하였다. 테스트 한 결과, 구현한 SWT Builder는 GUI 구성 시간에 있어 기존 SWT Builder보다 1.4배 더 빠른 속도를 가진다. 또한 기능 부분에서는 Factory 클래스 소스 코드의 자동 생성, 클래스 기능 문서 자동 생성 등 으로 프로그래머에게 더 많은 편의성을 제공한다.

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A Study on the Reliability Improvement of RFID System (REID 시스템의 신뢰성 향상에 관한 연구)

  • Ham, Jung-Ki;Lee, Cheong-Jin;Kwon, Oh-Heung
    • Journal of Digital Contents Society
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    • v.7 no.3
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    • pp.169-174
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    • 2006
  • In recent years, RFID is widely used in industrial applications including factory, material flow, logistics and defense areas. In this paper, The convolutional encoding and viterbi decoding is also implemented to improve the system performance. in an FPGA chip. The used convolution code is constraint length K=3 and rate R=1/2. The length of command frame and response frame is total of 48bits consisting of SOF 8 bits, command 16 bits, CRC 16 bit, and EOF 8 bits. And also the frame error rates are measured under the channel of line-of-sight and non line-of-sight, respectively. The performances are analyzed with FSK modulation only and FSK modulation added with convolutional encoding. These two measured results are compared with that of a RFID system with ASK modulation.

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A Internet of Things(IoT) based exploration robot design for remote control and monitoring (사물인터넷(IoT) 기반 원격 제어 및 모니터링이 가능한 탐사로봇 설계)

  • Kim, Byung-Chul
    • Journal of Digital Convergence
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    • v.13 no.1
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    • pp.185-190
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    • 2015
  • The trend of Internet of things are changed from public and examples of corporate center to B2C service. As you can see, through the practice of domestic and international services Internet of Things, conventional disaster, disasters, such as the case of the public sector, factory automation company now mainly direct B2C (Business to Consumer) services are affecting the individual has spread. In this paper we propose a method of platforms and components, and network configuration plan for exploration robot design based on remote control and monitoring system with IoT.

A Design of Small Size Sensor Data Acquisition and Transmission System (소형 센서 데이터 수집 및 전송 시스템 설계)

  • Lim, Joong-Soo
    • Journal of Convergence for Information Technology
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    • v.9 no.1
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    • pp.136-141
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    • 2019
  • In this paper, we describe the design of a small size data acquisition system with STM32 processor based on Cortex-M4. The system is used for the sensor devices to collect raw data on production lines at factory and send them to the server computer in real time. Also the system is designed to easily acquisite various kinds of data collected from various sensors with the digital signal input unit, the analog signal input unit, the digital signal output unit and the analog signal output unit This small data acquisition system will contribute to the improvement of the quality of precision products in the industrial field by collecting various data in real time and transmitting data at high speed.

An Analysis of Cluster Life Cycle on the Dynamic Evolution of the Seoul Digital Industrial Complex in Korea (서울디지털산업단지의 진화와 역동성 - 클러스터 생애주기 분석을 중심으로 -)

  • Koo, Yang-Mi
    • Journal of the Korean association of regional geographers
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    • v.18 no.3
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    • pp.283-297
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    • 2012
  • This study aims to analyze an evolutionary path and the dynamics of the Seoul Digital Industrial Complex in Korea based on the analysis of cluster life cycles. From the mid 1960s to the late 1990s, the life cycles and their characteristics of the Seoul Digital Industrial Complex (Guro Industrial Park) are examined as emergence-growth-sustainment-decline focused on the number of firms and employees. After the late 1990s, the number of firms and employees increases rapidly and the active actors of the growth and restructuring are transformed to the technology-intensive SMEs and knowledge-based service firms. Knowledge industry centers (apartment-type factories) help evolve into the life cycle of transformation as knowledge-based clusters after the mid 2000s.

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Implementation of Patient Supervision System Using USN and Healthcare board (USN과 헬스 케어 보드를 이용한 환자 감시 시스템 구현)

  • Lee, Cheol-Hee;Lee, Sand-Hoi
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.141-142
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    • 2008
  • According as USN's application field is magnified, various results are appearing. Efforts to apply this results in life are progressing. In car field, is used in control that level of significance is less. In home network, is used in a household electric appli-ance control and electric lamp control, security etc.. In factory, is used in process control, and is used in various application because is involved with RFID leader recently. In this paper, patient's status monitoring, USN use wish to. Because USN can utilize existent network, it is system that can transmit various data as that change passed information.Wish to send information that get in health-care board. Information that can get in health-care board is blood pressure, blood sugar, stroke, SPO2, ECG, the activity amount, position. Also, wish to forecast use possibility to involved various service, silver industry with database.

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A Study on the Design of a Digital Controllor for the Low-cost Automation of a Cable Extruding System (간이 자동화에 의한 전선 압출공정의 디지털 제어기 설계에 관한 연구)

  • Kim, Yong-Deak
    • Journal of the Korean Society for Precision Engineering
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    • v.2 no.3
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    • pp.84-91
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    • 1985
  • This paper proposes the theory for the Low Cost Automation (LCA) as a intermediate process of the factory automation, where the SCA is new adaptation for the improving productivity without changing the current product lines. And also this paper deals with the case study for the predictable effects and technical method at the extruding cable lines. As the results, the implementation of the LCA theory could be acomplished saving materials and man power, improving reliability and productivity. For this facilities, it cost within 5% extra expense of a extruding cable line systems. And it could be refund in six months.

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ACCELEROMETER SELECTION CONSIDERATIONS Charge and Integral Electronic Piezo Electric

  • Lally, Jim
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.1047-1051
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    • 2004
  • Charge amplifier systems benefit from the very wide dynamic range of PE accelerometers by offering flexibility in adjusting the electrical output characteristics such as sensitivity and range. They are well suited for operation at high temperatures. Modern charge systems feature improved low noise operation, simplified digital controls, and dual mode operation for operation with charge or IEPE voltage mode sensors. high impedance circuitry is not well suited for operation in adverse field or factory environments. The resolution of a PE accelerometer may not be specified or known since noise is a system consideration determined by cable length and amplifier gain. IEPE accelerometrs operate from a constant current power source, provide a high-voltage, low-impedance, fixed mV/g output. They operate through long, ordinary, coaxial cable in adverse environments without degradation of signal quality. They have limited high temperature range. IEPE sensors are simple to operate. Both resolution and operating range are defined specifications. Cost perchannel is lower compared to PE systems since low-noise cable and charge amplifiers are not required.

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