Papers by Guillermo Silva Pineda
Calibration of laser vibrometers at frequencies up to 100 kHz and higher
Proceedings of SPIE, Jun 4, 2008
Calibration of laser vibrometers at frequencies up to 100 kHz and higher. [Proceedings of SPIE 70... more Calibration of laser vibrometers at frequencies up to 100 kHz and higher. [Proceedings of SPIE 7098, 70981K (2008)]. Guillermo Silva Pineda, Hans-Jürgen von Martens, Sergio Rojas, Arturo Ruiz, Lorenzo Muñiz. Abstract. Manufacturers ...
On the estimation of uncertainties for the accelerometer calibration using laser interferometry
International conference on vibration measurements by laser techniques, 2000
Abstract In practice, traceability leads to improve the accuracy and agreement among the results ... more Abstract In practice, traceability leads to improve the accuracy and agreement among the results obtained using different means of measurement. However, in every calibration within the traceability chain there is a certain increment of the uncertainty of measurement. The ...
This paper presents preliminary results obtained in an international intercomparison of the calib... more This paper presents preliminary results obtained in an international intercomparison of the calibration of acceleration standards by participating laboratories of the Inter-American Metrology System (SIM). Participating laboratories were the National Metrology Institutes of five american countries, i.e., National Institute of Standards and Technology (NIST U.S.A.), National Research Council (NRC Canada), Centro Nacional de Metrología (CENAM Mexico), Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (INMETRO Brazil) and Instituto Nacional de Tecnología Industrial (INTI Argentina). Calibrations of three standard accelerometers by laser-interferometry and calibration of a signal conditioner were performed by each of the participating laboratories. A brief description of the experimental procedures and preliminary results for the calibration of the accelerometers are given in this paper.
High frequency acceleration comparison among NIST, INMETRO and CENAM
The first inter-laboratory comparison in the field of vibrations carried out under the framework ... more The first inter-laboratory comparison in the field of vibrations carried out under the framework of the Interamerican Metrology System (SIM.AUV.V-K1) covered the interferometric calibration of both single-ended and double-ended standard accelerometers and the electrical calibration of a charge amplifier. This comparison was carried out during 1998-1999 and was up-limited to the frequency of 5 kHz, to allow the greatest number of participating laboratories. After the first SIM comparison, NIST, CENAM and INMETRO decided to carry out a supplementary comparison, focused on the interferometric calibration of one standard accelerometer of the single-ended type in the frequency range from 3 kHz to 10 kHz. The obtained results and conclusions are presented here.
In the International System of Units, SI, the linear acceleration quantity and the other dynamic ... more In the International System of Units, SI, the linear acceleration quantity and the other dynamic quantities are defined as derived quantities. Depending upon both measurement standards and measurement methods they are traceable to certain basic quantities in the SI. The uncertainty of the measurement gives an idea about the length of the traceability chain up to the standards of basic quantities and the accuracy of the methods used in every calibration step. Experimental results of a Michelson interferometer, whose standards are traceable to basic units of length and time, are shown. The experimental method analyzed in this paper is the fringe counting method. The uncertainty budget, which is based on the first order Taylor series approximation, expressed for the sensitivity calibration of a piezoelectric accelerometer, is analyzed. The obtained uncertainty model has the ability to identify the most important sources of uncertainty, besides further improvements to the measurement ac...
Final report of CCAUV.V-K3: key comparison in the field of acceleration on the complex charge sensitivity
Metrologia, 2016
This is the final report for CIPM key comparison CCAUV.V-K3 in the area of 'vibration' (q... more This is the final report for CIPM key comparison CCAUV.V-K3 in the area of 'vibration' (quantity of acceleration). The aim of this comparison was to measure the voltage sensitivity of one accelerometer standard set with primary means at 27 frequencies from 0.1 Hz to 40 Hz. Fourteen Metrology Institutes from five RMOs have participated in the comparison with National Institute of Metrology, P.R. China as pilot lab and Laboratoire National de Métrologie et d'Essais and National Metrology Institute of South Africa as co-pilot labs. One quartz-flexure servo accelerometer of single-ended type and a signal conditioner was circulated among the participants. All but one of the participating laboratories provided their calibration results, which were mostly consistent within their declared expanded uncertainties for magnitude results. Only two participants failed to contribute to the KCRV values calculated for five frequencies. For phase shift, three participants could not contri...
Calibration of laser vibrometers at frequencies up to 100 kHz and higher
Calibration of laser vibrometers at frequencies up to 100 kHz and higher. [Proceedings of SPIE 70... more Calibration of laser vibrometers at frequencies up to 100 kHz and higher. [Proceedings of SPIE 7098, 70981K (2008)]. Guillermo Silva Pineda, Hans-Jürgen von Martens, Sergio Rojas, Arturo Ruiz, Lorenzo Muñiz. Abstract. Manufacturers ...
Sixth International Conference on Education and Training in Optics and Photonics, 2000
This paper reviews the theoretical basis of two laser interferometry vibration measuring methods ... more This paper reviews the theoretical basis of two laser interferometry vibration measuring methods of high accuracy, i.e., frequency ratio and Bessel function minimum point. These techniques are used for low and high vibration frequencies, respectively. The most recent experimental developments are highlighted and contributions to the classic models are shown.
Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 2000
In practice, traceability leads to improve the accuracy and agreement among the results obtained ... more In practice, traceability leads to improve the accuracy and agreement among the results obtained using different means of measurement. However, in every calibration within the traceability chain there is a certain increment of the uncertainty of measurement. The uncertainty of measurement gives an idea of the length of the traceability chain and the accuracy of the methods used to calibrate the measurement standard. The case when the linear acceleration quantity is measured using a laser interferometer, traceability to length through the calibration of the laser in wavelength, and time and frequency through the calibration of a sine generator and a frequency counter, is discussed. It highlights that an important portion of type B uncertainty related with these reference standards depends on two factors, their traceability chain to basic standards of length and frequency, and the measurement accuracy achieved within the traceability chain.
Charge amplifier calibration comparison among NIST, CENAM, and INMETRO
The Journal of the Acoustical Society of America, 2002
This paper presents the results obtained in an international laboratory comparison among NIST/USA... more This paper presents the results obtained in an international laboratory comparison among NIST/USA, CENAM/Mexico and INMETRO/Brazil which was focused on the electric calibration of a charge amplifier B & K model 2626 from 50 Hz to 5 kHz. One of the main concerns of this comparison was to conclude all measurements within the period of 1 month, in order to minimize the influence of long-term temporal instabilities. Each participating laboratory carried out the measurements in accordance with a calibration protocol, which was established to avoid the effect of additional sources of uncertainty. The results are compared with the ones obtained during the former comparison SIM.AUV.V-K1 and the conclusions are presented.
On the uncertainties of accelerometer calibration by laser interferometry
The Journal of the Acoustical Society of America, 2002
Depending on both measurement standards and measurement methods, derived quantities such as accel... more Depending on both measurement standards and measurement methods, derived quantities such as acceleration are traceable to the basic quantities in the International System of Units, SI. The uncertainty of measurement is often related to the length of the traceability chain up to the standards of reference quantities and the accuracy of the methods used in every calibration step. The traceability chart of the experimental arrangements can be used to visualize the different uncertainty levels and their relationships from the application of measurement to the standards of basic quantities in the SI. For the case of accelerometer calibration, experimental results of the fringe-counting method using a Michelson interferometer, which has standards traceable to basic units of length and time, are shown. Also, the physical principles and the alignment of the laser interferometer are discussed, and how the measurement accuracy can be improved. The classical approach of the uncertainty budget,...
On the estimation of uncertainties for the calibration of standard accelerometers using the fringe counting method
The Journal of the Acoustical Society of America, 1997
The uncertainties calculation procedure for the estimation of errors when the fringe counting met... more The uncertainties calculation procedure for the estimation of errors when the fringe counting method is used to get the sensitivity of standard accelerometers is developed. The fringe counting method is used in the frequency range from 50 to 800 Hz and into a dynamic range from 20 to 100 m s−2. Also, the reference condition is set up at 160 Hz and 50 m s−2, where the main objective is to get the lowest uncertainty between all the frequency and dynamic ranges mentioned above. This calculation procedure agrees with both the ‘‘Guide to the expression of uncertainty in measurement’’ and the ISO 5347-1 ‘‘Primary vibration calibration by laser interferometry.’’ Furthermore, type B uncertainties are received from specific technical information from the equipment used during the calibration procedure and the type A uncertainty is received from periodic measurements performed on the standard accelerometer which have been monitored. Data from primary calibrations have been used to validate th...
High-frequency acceleration comparison among NIST, CENAM, and INMETRO
The Journal of the Acoustical Society of America, 2002
This paper presents the results obtained in an international laboratory comparison among NIST/USA... more This paper presents the results obtained in an international laboratory comparison among NIST/USA, CENAM/Mexico, and INMETRO/Brazil. This acceleration comparison was focused on the calibration of the charge sensitivity of a single-ended standard accelerometer in the frequency range from 3 kHz to 10 kHz. The measurements were carried out by laser interferometry in accordance with the standard ISO 16063-11:1999 and with a preagreed protocol. This comparison supplements the former comparison SIM.AUV.V-K1, which covered the frequency range from 50 Hz to 5 kHz.
Interferómetro Michelson en Cuadratura Para Calibración De Acelerómetros Por Impacto
cenam.mx
Page 1. Simposio de Metrología 2004 25 al 27 de Octubre INTERFERÓMETRO MICHELSON EN CUADRATURA PA... more Page 1. Simposio de Metrología 2004 25 al 27 de Octubre INTERFERÓMETRO MICHELSON EN CUADRATURA PARA CALIBRACIÓN DE ACELERÓMETROS POR IMPACTO Sergio R. Rojas, Guillermo Silva Pineda, Arturo Ruiz Rueda. ...
Proceedings of the SEM Annual Conference on …, 2001
Nowadays, piezoelectric accelerometers are among the most developed transducers used for the meas... more Nowadays, piezoelectric accelerometers are among the most developed transducers used for the measurement of mechanical vibrations due to its linearity, short and long term stability, size, and weight properties.
Industrial Dynamic Measurements of Mechanical Quantities within the Inter-American Metrology System (SIM)
Journal of Physics: Conference Series, 2021
Most industrial measurements of force and torque are performed dynamically, while calibrations ar... more Most industrial measurements of force and torque are performed dynamically, while calibrations are performed mostly in static form. It is evident that the dynamic responses of the instruments are very different from the static form. The National Metrology Institutes (NMIs) have been requested by industry to develop solutions for this gap in metrological traceability and have recently undertaken activities to do so. The Inter-American Metrology System (SIM) implemented the project “Industrial Dynamic Measurements (from industry to primary standard)”, involving the NMIs: INTI/Argentina, INMETRO/Brazil, NIST/USA CENAM/Mexico and INM/Colombia. Main backgrounds, findings and outlooks of the project are highlighted in this paper.
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Papers by Guillermo Silva Pineda