Measurement of mechanical vibrations with laser interferometric equipment.

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Universitetet, Almqvist & Wiksell (distr.) , Uppsala, Stockholm
Vibration -- Measurement., Laser interferometers., Damping (Mecha
SeriesActa Universitatis Upsaliensis ;, 153, Acta Universitatis Upsaliensis., 153.
Classifications
LC ClassificationsQ64 .A63 no. 153
The Physical Object
Pagination9, (1) p.
ID Numbers
Open LibraryOL4371492M
LC Control Number78571009

Contactless high accuracy laser interferometric vibrometers can be used for vibration measurements on rough surface objects. With the large measuring range with a distance resolution of few picometers in the time range and the frequency range from 0 Hz to maximum 5 MHz, they are suitable for use in industry and science.

A laser Doppler vibrometer (LDV) is a scientific instrument that is used to make non-contact vibration measurements of a surface. The laser beam from the LDV is directed at the surface of interest, and the vibration amplitude and frequency are extracted from the Doppler shift of the reflected laser beam frequency due to the motion of the surface.

The output of an LDV is generally a continuous. The following vibration measurement techniques for structures and equipment including piping are also being researched at present: laser techniques based on interference and Doppler effect of.

Measurement and analysis of mechanical vibrations using the optical IR heterodyne technique N. Iftimia, V. Babin, M. Strzelec, S. Ersen, A. Moldovan Pages Measurement of mechanical vibrations with laser interferometric equipment.

book Mechanical parts inspection and measurement; Mechanical vibration analysis; Semiconductor fabrication, inspection and repair; When built into manufacturing and inspection equipment, a laser interferometer system reports the position or controls the motion of a product platform with more accuracy than any other method.

Details Measurement of mechanical vibrations with laser interferometric equipment. FB2

Cookson, R. and Bandyopadhyay, P. () Mechanical vibration measurement using a fibre optic laser-Doppler probe. Optics and Laser Technology, 33– Google Scholar. laser, interferometric. Laser-based Dynamic Calibration Systems Mechanical parts inspection and measurement Mechanical vibration analysis Semiconductor fabrication, inspection and repair When built into manufacturing and inspection equipment, a laser interferometer system reports the position or controls the motion of a product platform.

Micro-Electro-Mechanical Systems have been growing rapidly over recent years. However, measurement of their motions is a difficult problem. A laser Doppler interferometric system for measuring motion characteristics of vibrating combs in MEMS is presented.

The working principle and optical diagram of the system are explained.

Description Measurement of mechanical vibrations with laser interferometric equipment. PDF

Extech's VB Vibration Recorder. The VB is a very cost effective vibration measurement instrument and is an entry level vibration recorder. Coming in at less than $ it can be a great first option at quantifying your vibration environment.

It’s definitely limited in sample rate (up to Hz) and total storage (4Mbit or K samples per axis) but for some applications this as adequate. Mechanical vibration analysis Semiconductor fabrication, inspection and repair When built into manufacturing and inspection equipment, a laser interferometer system reports the position or controls the motion of a product platform with more accuracy than any other method.

By John Hayes. Mechanical vibration and turbulent airflow present significant problems for most interferometric test methods. Conditions on the factory floor and in industrial clean rooms with high-capacity air filtration systems, for example, can hamper the use of interferometry.

H.-J. von Martens, “ Further Progress in Laser Vibrometer Calibration—Part 1: Generation of High-Frequency Vibrations at High Amplitudes,” Paper presented at the Final Meeting on European Project “Laser vibrometry network: Systems and applications” (LAVINYA), EC Program Measurements and Testing, Thematic Networks, Contract G6RT-CT.

The primary objective of this paper is to present a new realtime, interferometric method for mechanical vibration measurements and the associated quantitative interpretation.

Vibration Amplitude. The maximum amplitude or range of the vibration you are measuring determines the sensor range that you can use. If you attempt to measure vibration outside a sensor’s range, it distorts or clips the response.

Typically, accelerometers used to monitor high vibration levels have a lower sensitivity and lower mass. Sensitivity. Measurement of mechanical vibrations with laser interferometric equipment. Simple search Advanced search - Research Measurement of mechanical vibrations with laser interferometric equipment.

Sundbäck, Ulrik. Uppsala University. Abstract. We performed a comparison between two laser interferometric methods. One of the methods is used by our modernized Michelson type laser interferometric motion analyser (LIMA), which measures primarily the displacement, while the other method is the one used by an LDV (Laser Doppler Vibrometer) device, which primarily measures the velocity on the basis of the Doppler effect.

Measurement of mechanical vibrations with laser interferometric equipment Sundbäck, U Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.

Vibration measurement is sometimes used as an indirect measurement of some other value. The final measurement goal determines the approach to the measuringcondition monitoring– predicting or monitoring wear, fatigue, and failure – requires vibration measurements meant to determine the kinetic energy and forces acting upon an object.

Download Measurement of mechanical vibrations with laser interferometric equipment. FB2

Laser two-color heterodyne interferometry is a proven method to measure electron density in fusion plasmas. Though only used in tokamaks with high electron densities, the idea of also using two-color laser interferometers for stellarators and small machines to replace far-infrared laser.

Here, we study the influence of mechanical vibration and magnetic field, which are typically present in magnetic confinement fusion devices, on the performance of a fiber-optic bolometer (FOB) based on silicon Fabry-Perot interferometer (FPI) demodulated by a scanning diode laser.

It is found that both the vibration and magnetic field could. Interferometry applied. In order to generate an interference pattern with high precision (distinct fringes), it is very important to have a single highly stable wavelength source, which is achieved using the XL laser.

There are different interferometer set up's based on Michelson's principle, however, the linear set up is the simplest type to explain. Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed, causing the phenomenon of interference, which is used to extract information.

Interferometry is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications to.

Testing requires the metrology equipment to be separated from the test part, often by tens of meters (see Fig. The long test cavities introduce significant turbulence to the measurement. In addition, the physical separation is highly susceptible to mechanical vibration. AMTAST Digital Vibration Meter Vibrometer Handheld Vibration Analysis Equipment Acceleration Velocity Displacement Measurement for Moving Machinery by AMTAST $ $ have been achic:Yed 11ithout thorough measure­ ment.1 nd study of mechanical vibration.

There arc. on the other hand, many important applicatiOns of controlled vibration. Tiny vibrat­ ors attached to instrument panels arc being used to 0\Trcomc pivot f rirtion of i nd icati ng meters.

Abstract. An interferometric method for measuring vibration displacement and acceleration in the Hz – 10 kHz frequency range is described and experimentally tested. Our experimental setup is based on the Twyman-Green interferometer and we were able to measure vibration. Scanning Laser Doppler Vibrometer Scanning Laser Doppler vibrometry is a full-field vibration imaging measurement technique in which the vibrometer measurement beam scans the test object and records the vibration data of a grid of measurement points within a short time.

LASERS AND OPTICS TRACEABLE VIBRATION AMPLITUDE MEASUREMENT WITH A LASER INTERFEROMETER F. GAROI1, D. APOSTOL1, V. DAMIAN1, P. SCHIOPU2 1National Institute for Lasers, Plasma and Radiation Physics, At omistilor StreetP.O. Box MG, RO Bucharest-Magurele, Romania.

Interferometric measuring techniques in dimensional metrology are well established and represent a link between the fundamental etalon of length and mechanical measuring systems.

Significant effort has been invested into improvement of their performance in the nanoscale through linearization of the fringe interpolation [12]. Laser interferometry & interferometer vibration isolation for surface measurements and measureing.

Vibration control using vibration isolation tables, platforms, isolators, benchtops and solutions by Minus K. For microelectronics fabrication, industrial laser and optical systems, biological research, nanotechnology laboratories, etc.

measurements, moisture content, sound speed, subsurface soil layer measurements, and other mechanical properties []. It has been observed that vibration of unconsolidated sand can affect the performance of an interferometric sensor, due to the relative motion between soil.

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.INEGI-Institute of Mechanical Engineering and Industrial Management Rua dos Bragas PORTO CODEX Portugal Abstract The application of laser interferometry techniques to study the dynamic behaviour of structural components is described.

Being a non contact field technique, it allows the measurement of a dynamic.