• Title, Summary, Keyword: instrumentation

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Microcontroller based split mass resonant sensor for absolute and differential sensing

  • Uma, G.;Umapathy, M.;Kumar, K. Suneel;Suresh, K.;Josephine, A. Maria
    • Smart Structures and Systems
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    • v.5 no.3
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    • pp.279-290
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    • 2009
  • Two degrees of freedom resonant systems are employed to improve the resonant property of resonant sensor, as compared to a single degree of freedom resonant system. This paper presents design, development and testing of two degrees of freedom resonant sensor. To measure absolute mass, cantilever shaped two different masses (smaller/absorber mass and bigger/drive mass) with identical resonant frequency are mechanically linked to form 2 - Degree-of-Freedom (DOF) resonator which exhibits higher amplitude of displacement at the smaller mass. The same concept is extended for measuring differential quantity, by having two bigger mass and one smaller mass. The main features of this work are the 3 - DOF resonator for differential detection and the microcontroller based closed loop electronics for resonant sensor with piezoelectric sensing and excitation. The advantage of using microcontroller is that the method can be easily extended for any range of measurand.

A Method of Image Identification in Instrumentation

  • Wang, Xiaoli;Wang, Shilin;Jiang, Baochen
    • Journal of Information Processing Systems
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    • v.14 no.3
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    • pp.600-606
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    • 2018
  • Smart city is currently the main direction of development. The automatic management of instrumentation is one task of the smart city. Because there are a lot of old instrumentation in the city that cannot be replaced promptly, how to makes low-cost transformation with Internet of Thing (IoT) becomes a problem. This article gives a low-cost method that can identify code wheel instrument information. This method can effectively identify the information of image as the digital information. Because this method does not require a lot of memory or complicated calculation, it can be deployed on a cheap microcontroller unit (MCU) with low read-only memory (ROM). At the end of this article, test result is given. Using this method to modify the old instrumentation can achieve the automatic management of instrumentation and can help build a smart city.

PI controller design by stability criterion and Genetic algorithm (안정도 판별법과 유전자 알고리즘에 의한 PI 제어기 설계)

  • Cho, Joon-Ho;Choi, Jung-Nae;Lee, Won-Hyok;Hwang, Hyung-Soo;Park, Min-Jung
    • Proceedings of the KIEE Conference
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    • pp.2230-2232
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    • 2003
  • One of the important problems in a control system design is the requirement that the system should have adequate relative stability. In this paper, We proposed a tuning algorithm PI controller for first order plus dead time system. It is determined the domain of the PI control parameters by Routh - Hurwitz criterion, and we tune parameters of the PI controller using genetic algorithm. A numerical example is also given to illustrate the method.

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Acquisition and Processing of 3D Data (3차원 데이터의 획득 및 가공)

  • Kim A.H.;Kim Y.S.;Bae C.;Kang W.C.;Kim Y.D.
    • Proceedings of the KIPE Conference
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    • pp.286-290
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    • 2003
  • Accurate acquisition of surface geometries such as machined surfaces, biological surfaces, and deformed parts have been very important technique in scientific study and engineering, expecially for system design, manufacturing and inspection. Two camera method keeps accuracy more than double than mechanical method. In this paper, we describe the processes surface data of teeth for automatic processing, transformation that changes to coping data of possible numeric data form and processed inlay teeth. As the result of the Inlay manufacture, which can process with high resolution, therefore we construct the automatic processing system that depends on manual

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Volumetric 3D Display System Based on Rotating Dot-Matrix LEDs

  • Lin, Yuanfang;Liu, Xu;Zhang, Xiaojie;Yao, Yi;Liu, Xiangdong
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.440-441
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    • 2004
  • A volumetric three-dimensional (3D) display system was presented, which utilizes a rotating two-dimensional (2D) display panel of light emitting diodes (LEDs) to generate more than 10 million volume pixels (voxels) within a cylindrical volume of 165 mm in height and 292 mm in diameter. Due to persistence of vision, momentarily addressed voxel information is perceived and fused into a 3D image. Important cues for depth perception, such as binocular parallax, accommodation, convergence and motion parallax are satisfied automatically and naturally, thus it is suitable for individual or group viewing, without the need for any special visual aids.

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A modified Genetic Algorithm using SVM for PID Gain Optimization

  • Cho, Byung-Sun;Han, So-Hee;Son, Sung-Han;Kim, Jin-Su;Park, Kang-Bak;Tsuji, Teruo
    • 제어로봇시스템학회:학술대회논문집
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    • pp.686-689
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    • 2004
  • Genetic algorithm is well known for stochastic searching method in imitating natural phenomena. In recent times, studies have been conducted in improving conventional evolutionary computation speed and promoting precision. This paper presents an approach to optimize PID controller gains with the application of modified Genetic Algorithm using Support Vector Machine (SVMGA). That is, we aim to explore optimum parameters of PID controller using SVMGA. Simulation results are given to compare to those of tuning methods, based on Simple Genetic Algorithm and Ziegler-Nicholas tuning method.

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Design of Virtual Instrumentation System based on XML (XML 기반의 Virtual Instrumentation 시스템 설계)

  • Song Min-Gyu;Byun Do-Young;Roh Duk-Gyoo;Oh Se-Jin;Lee Bo-Ahn
    • Proceedings of the KAIS Fall Conference
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    • pp.230-233
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    • 2004
  • CAMAC, PLC, DAQ나 GPIB와 같은 여러 인스트루먼트 인터페이스의 통합은 산업전반에 걸쳐서 널리 활용되고 있으며 이를 통하여 작업 효율 및 성능을 향상시킬 수 있다. 이를 지원하는 기술에는 여러 가지가 있지만 그 중에서 Virtual Instrumentation이 개발의 신속성 및 사용의 용이성 측면에서 타 기술을 압도하고 있는 추세이다. Virtual Instrumentation을 통한 시스템 통합에 있어서 현재 적용되고 있는 새로운 기술로서 XML을 들 수 있는데 이는 사용자와 인스트루먼트간의 통신뿐만 아니라 해당 정보 공유에 있어서 탁월한 기능을 제공한다. 본 논문에서는 이를 위하여 Virtual Instrumentation 시스템 설계에 있어서 XML 기술을 적용하고자 하면 이를 통하여 한층 진보된 시스템 설계를 제안하고자 한다.

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CURRENT STATUS OF THE INSTRUMENTS, INSTRUMENTATION AND OPEN USE OF OKAYAMA ASTROPHYSICAL OBSERVATORY

  • YOSHIDA MICHITOSHI
    • Journal of The Korean Astronomical Society
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    • v.38 no.2
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    • pp.117-120
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    • 2005
  • Current instrumentation activities and the open user status of Okayama Astrophysical Observatory (OAO) are reviewed. There are two telescopes in operation and one telescope under reforming at OAO. The 188cm telescope is provided for open use for more than 200 nights in a year. The typical over-subscription rate of observation proposals for the 188cm telescope is ${\~}$ 1.5 - 2. The 50cm telescope is dedicated to $\gamma$-ray burst optical follow-up observation and is operated in collaboration with Tokyo Institute of Technology. The 91cm telescope will become a new very wide field near-infrared camera in two years. The high-dispersion echelle spectrograph (HIDES) is the current primary instrument for the open use of the 188cm telescope. Two new instruments, an infrared multi-purpose camera (ISLE) and an optical low-dispersion spectrograph (KOOLS), are now under development. They will be open as common use instruments in 2006.

Laser Scanning Instrumentation Technique for Movement of Excavation (Laser Scanning을 활용한 지반굴착 및 주변 구조물 거동관측)

  • Cho, Seong-Ha;You, Kwang-Ho
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.165-173
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    • 2005
  • Generally, the instrumentation scheme for urban excavation projects consist of a series of tools such as inclinometer piezometer, loadcell, tiltmeter etc. Because almost every equipments are placed along several typical lines, it is impossible to evaluate the whole behavior of structures and adjacent buildings simultaneously. With laser scanning technique developed for surveying, all visible structures are scanned in the form of 3D digital data in a time schedule as planned. It can be analysed effectively the movements for all area affected by excavation even the spots in where no instrumentation tools. Although there are some parts to be refined such as scanning error, proper analysing software, it gives many advantages for realistic instrumentation works in the near future.

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16 channel Loadcell measurement system development. (16 채널 로드셀 계측시스템 개발)

  • Jarng, Soon-Suck;Kim, Kyung-Suk;Won, Yong-Ill;Kim, Dae-Gon
    • Proceedings of the IEEK Conference
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    • pp.1055-1058
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    • 2005
  • The present paper designed a weight measuring instrumentation system in which data conversion and a series of signal processing were totally equipped. 16 loadcell are incoming sensors and each output of the loadcell was amplified and filtered for proper analog signal processing. Several measuring instrumentation OP amps and general purposed OP amps were used. 12 bits A/D converters converted analog signals to digital bits and a PIC microprocessor controlled the 16 channels of loadcell. RF RS232 modules were used for wireless communication between the PIC microprocessor and an ethernet host for a remote sensor monitoring system development.

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