K. Fukuda, K. Kameoka, T. Ono, K. Yoshida
An axle weighing system is a system that measures each axle weight of in-motion vehicles while they pass though on the weighbridge. In the weighing, signal processing technique is the key to achieve the precise measurement since the output signal from the weighbridge is contaminated with the noise due to the vibration of the vehicle in motion. In our previous paper, we proposed a new signal processing method using normal equations to estimate the vibration parameters. In the present paper, we examined the relation between the velocities of in-motion vehicles and the estimated values obtained...
TC3 Conference 2001
· TC3
· 2001
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Z. Demirel Atasoy
Some physical quantities are used for design of the various machine prototype, improvement research and determination of the operating circumstances. These physical quantities, which are widely known, are tension-compression forces, moment, distance, velocity, vibration, flow rate, pressure and revolution per minute values. Such parameters can be measured by appropriate measurement techniques. Nowadays, every kind of mechanical quantities can be converted electrical signal, transmitted, recorded or processed by electronic components. Physical properties of materials change under mechanical...
TC3 Conference 2001
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· 2001
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S. Fank, M. Demirkol
Creep problem of spring materials plays an effective role on the performance of force transducers. Several heat treatments can be applied to spring materials in order to minimize creep response. The effect of heat treatment on creep properties of AISI 4340 steel was investigated in this study. The tensile specimens of AISI 4340 steel were austenitized and oil quenched, and then tempered to 35, 45 and 55 Rockwell-C hardness levels. After proper heat treatment and final machining of column type specimens, the preparation of tensile force transducers was completed by bonding special-class...
TC3 Conference 2001
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· 2001
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E. Bilgiç, B. Karaböce, E. Sadikoglu, S. Fank
This paper deals with the influence of mechanical vibration on the performance of strain-gauge based force transducers. Force transducers of beam bending with binocular type were used for investigations. The transducers with different capacities varying in the range of 3 – 30 kg were loaded by the calibrated masses and excited by discrete accelerations levels at a certain frequency. The difference in electrical output of transducer caused by mechanical vibration has been determined. Resonance curves of the transducers have been obtained by frequency sweep measurements under loaded conditions.
TC3 Conference 2001
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· 2001
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F. Tigrel, S. Fank, H. Kaya
In order to test load cells used according to OIML R60 regulation in different temperature such as –10, 20 and 40°C with increasing and decreasing loading conditions, dead-weight machine and good temperature control cabinet are necessary. ESIT Company has been manufacturing different type and capacities load cells in the last 12 years in Istanbul. In order to improve product quality and accuracy of ESIT load cells, a new dead-weight machine was designed and manufactured in ESIT Factory. This machine is capable to testing the compression load cells up to 500 kg. In this machine, quick loading...
TC3 Conference 2001
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C. Ferrero, C. Marinari
Force transducers are calibrated using dead-weight, lever multiplication or hydraulic multiplication standard machines. For very large capacities, in general above 1 MN, the "build-up" method may be employed, consisting of comparing the dynamometer to be calibrated with one or more dynamometers linked in parallel. With the "build-up" method the field of force measurement may be extended to values that would not appear possible with the use of dead-weight or multiplication primary standards, at a much lower cost. The present paper reports the evolution over time, that is the long term...
TC3 Conference 2001
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Aimo Pusa
For us there was not known intercomparison for the calibration of uniaxial testing machine. It was the reason to work out this kind of comparison during the year 1999. By planning the comparison there was two main problems by this kind of comparison. The first one; the object can not be circulated from calibrating laboratory to next one. The second one is that the testing machine should be measured to get the status of a reference standard. The first problem was solved tat every laboratory had to travel to the location, where testing machine was. Second problem meant that the history of...
TC3 Conference 2001
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S. Kurosu, K. Kodama, M. Adachi, K. Kamimura
This paper concerns the development of a new type of force sensor called Gyroscopic Force Measuring System, (simply called GFMS) for measuring a force vectorialy. The GFMS realized a highly accurate measurement using an estimator for the unknown angles of incidence of a force vector. The estimator, however, assumed an exact knowledge on the dynamical equations in the steady-state. This caused much degradation in the measurement accuracy unless the steady-state of the GFMS could be attained. The estimation errors of the angles of incidence directly affect the accurate measuring of the force....
TC3 Conference 2001
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· 2001
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J. C. T. Guzmán, D. R. Ahedo, J. P. Cruz, J. M. E. Saffar
A force comparison was carried out between Brazil and Mexico, in order to estimate the level of agreement for the realisation of the quantity. The comparison participants were two secondary laboratories (CETEC and IPT/SP) and the national metrology institute (INMETRO) from Brazil and the national metrology institute (CENAM) from Mexico. The comparison was carried from 20 kN to 150 kN, using two load cells as comparison standards, having 1·10 -5 relative repeatability each. Resumes of the general guidelines and procedure used for the comparison as well as the results obtained, deviations...
TC3 Conference 2001
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J. C. T. Guzmán, D. R. Ahedo, J. P. Cruz
A force comparison was carried out within the Interamerican Metrology System (SIM), in order to estimate the level of agreement for the realisation of the quantity, and the uncertainty associated to its measurement. The comparison participants were the National Metrology Institutes (NMI´s) from SIM with dead weight machines: United States of America, Brazil and Mexico. The comparison was carried out up to 150 kN, using a load cell as the standard, having 1·10 -5 relative repeatability. The "Centro Nacional de Metrología"(CENAM), in Mexico, was the co-ordinator and pilot laboratory. The...
TC3 Conference 2001
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· 2001
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