Yusuke Inoue, Ichirou Ishimaru, Gen Hashiguti
In the present study, we investigate the removal of extremely minute materials via a micro manipulator. This operation requires measurement and control of the position and attitude of the micro manipulator at a sub-micrometer level. Therefore, a miniature instrumentation sensor having six degrees-of-freedom is necessary. We devised a technology that measures the diffracted light from minute slits formed on the micro manipulator which enables the position and attitude to be measured in six degrees-of-freedom simultaneously using only one laser light. In the present paper, we report the result...
XVII IMEKO World Congress
· TC17
· 2003
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Davor Zvizdic, Lovorka Grgec Bermanec, Georges Bonnier, Eliane Renaot, Tomislav Veliki
This paper presents a simplified model for the evaluation of the measurement uncertainty of pressure balance effective area calibrated by method of comparison which is being applied at Laboratory for Process Measurements (LPM). The methodology is applied for oiloperated industrial pressure balances in the gauge pressure range up to 60 MPa. The scope of the procedure is illustrated by calculation example.
XVII IMEKO World Congress
· TC16
· 2003
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Henryk Urzedniczok, Jan Zakrzewski
The dynamic calibration of silicon pressure sensor and whole pneumatic part of the pressure transducers becomes an important problem in many applications. The known methods are not satisfactory for low range sensors. In this paper a simple system for short pulse pressure generation is described. A method for determination of frequency response based on pressure pulse signal is presented. The obtained results show that this method is simply for realisation and useful for low range silicon pressure sensors.
XVII IMEKO World Congress
· TC16
· 2003
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Luca Tomasi, Engelbert Wieser, Eju Baruah, David Collomb, Florent Jolly, Gehard Krötz, Stefan Storm, Peter Jänker, Ernst Obermeier
The need for dynamic pressure calibration has been increasing in the past years. Many solutions have been developed to satisfy this demand; nevertheless both present periodic and aperiodic systems do not cover the whole range of needs, calling for further development effort. In this contribution is presented a newly designed piezoelectric-actuated dynamic high-pressure calibration system that operates both periodically, 70·10 5 Pa peak-topeak at 300 Hz, and aperiodically, almost 50·10 8 Pa/s. Concept, design and first experimental results are described. First encouraging results foster...
XVII IMEKO World Congress
· TC16
· 2003
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André Schäfer, Wolfgang Viel, Christoph Rapp-Hickler, Karl Mikulecki
Applications in the ultra-high pressure range are on the move forward. Of particular interest is the manufacturing of diesel injection components such as nozzles and rails. Also precision water jet cutting as well as high-pressure sterilisation, as a method of conservation in the food industry, have growing importance, mainly in Japan and the USA. For these emerging fields traceability of the measuring equipment with the highest possible accuracy is also a must for these ultra high pressures.
XVII IMEKO World Congress
· TC16
· 2003
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M. Bryant, N. Moisoi, S.M.Kesselman
The V1600 is a compact portable pressure balance suitable for applications where a large number of high accuracy calibrations in ranges from 20 Pa up to 16 kPa, need to be performed on a daily basis. Calibrations performed at VNIIMS, LNE, MIKE, NIST and PTB have shown the uncertainty of the V1600 is less than 0.1 Pa below 500 Pa and 0.02% of reading from 500 Pa to 16 kPa. An important part of the uncertainty of the instrument within the range 500 Pa to 16 kPa has been caused by a methodical error of the procedure applied to its calibration until now. This paper presents the original manner...
XVII IMEKO World Congress
· TC16
· 2003
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Bogdan Blagojevic, Ivan Bajsic
This paper describes our attempts to determine the effective area of a pressure balance (Type V1600/4D, manufactured by Pressurements, Ltd.) that is used in our pressure-calibration laboratory as a standard pressure balance for gauge and differential pressure measurements. The gauge measuring range of this gasoperated balance extends from a nominal pressure of 20 Pa up to 16 kPa, and its minimum differential pressure measurement is 5 Pa. This pressure balance is a "discrete" system, and therefore it has several pistons and weights. In the measuring range from a nominal pressure of 400 Pa up...
XVII IMEKO World Congress
· TC16
· 2003
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G. Buonanno, M. Dell'Isola, A. Frattolillo
The paper describes the design and the analysis of a new kind of pressure balance intended to operate up to 500 MPa. The design can be considered as a calculation test to evaluate the possibility to produce a pressure balance whose changes in effective area with pressure (and, consequently, the elastic distortions) are small if compared to other pressure balances operating in the same pressure range and, furthermore, it presents an extended measurement range. The method used for the theoretical characterisation is an improvement of a numerical method using a finite element method.
XVII IMEKO World Congress
· TC16
· 2003
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Klaus Hoffmann, Robert Liehl
The crosswind stability of an operating ropeway is an essential factor for its system security in adverse weather conditions. This paper introduces a mobile measuring system for characterisation of the crosswind stability of ropeways, firstly describing the measuring concept and the measuring sensors, then presenting some data records of the cross inclination of the gondola and the corresponding wind speed.
XVII IMEKO World Congress
· TC15
· 2003
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Pavel Macura, Rostislav Kubala
The contribution is devoted to the problems of residual stress measurement and reduction at the products for the railway traffic. The measurements were performed by means of cutting, ultrasonic and hole-drilling strain gage methods. Two variants of hole-drilling method were used – method with the full and incrementally drilled depth of hole. The different methods of measurement show often the different results, therefore the standards of the measurement methods for the products were worked out. At the railway traffic the standards of the measurement methods and of the allowed values of...
XVII IMEKO World Congress
· TC15
· 2003
· Download