2 edition of application of laser doppler technique to vibration measurement and position control found in the catalog.
application of laser doppler technique to vibration measurement and position control
Mark Edward Pleydell
|Statement||Mark Edward Pleydell.|
|Contributions||Dorset Institute of Higher Education.|
|The Physical Object|
|Pagination||xiv,199p. Thesis (Ph.D.) - Dorset Institute, Poole, 1986 ;|
|Number of Pages||1986|
Please use one of the following formats to cite this article in your essay, paper or report: APA. Polytec. (, January 14). Using Laser Doppler Vibrometry for Performance Characterization of. A technique to measure the size of particles in laser Doppler velocimetry (LDV) systems is described here. In typical LDV applications the velocity of the flow is inferrzd from the measurement of the velocity of very small particles seeded in the fluid. These particles are chosen to be small ( Dm.
Laser Doppler Vibrometry is an ideal non-contact measurement technique for characterizing vibrations of electric shavers. Manufacturers use this vibration data to optimize the performance and comfort of their shavers. Measurements are made on individual blades and . Please use one of the following formats to cite this article in your essay, paper or report: APA. Polytec. (, February 06). Application of Laser-Doppler Vibrometers in Hearing and .
Laser Vibrometer Technology and Benefits Optomet’s Laser Doppler Vibrometry (LDV) is a highly accurate and reliable non-contact vibration measurement technique utilizing sophisticated, laser-based technology to provide customers the best data quality possible. Background: Laser Doppler vibrometry is now a well established technique enabling noncontact vibration measurements in the most challenging of environments. Rotor vibration measurements are often highlighted as a major application of Laser Vibrometers due to their non-contact operation and inherent immunity to shaft run-out. Method of Approach: In such measurements, resolution of the Cited by:
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The laser Doppler interferometer reported here was developed to investigate the possibilities of remote vibration and motion measurements. The method is noncontacting and operates with unprepared targets, using the diffusely scattered light to measure the axial component of the motion.
The laser Doppler interferometer reported here was developed to investigate the possibilities of remote vibration and motion measurements. The method is noncontacting and operates with unprepared targets, using the diffusely scattered light to measure the axial component of the : Mark Edward Pleydell.
Laser Doppler Vibrometry (LDV) has been widely used in engineering applications involving non-contact vibration and sound measurements. This technique has also been used in some biomedical applications including hearing by: The application of laser doppler techniques to vibration measurement and position control By M.E Pleydell, Poole (United Kingdom) Dorset Inst.
of Higher Education and London (United Kingdom) Council for National Academic Awards (CNAA). An LDV is a non-contact measurement device which mea-sures, based on the principle of interferometry, the Doppler frequency shift of a laser beam reﬂected from a moving (vi-brating) target.
In our case, the LDV sensor is directed to a speaker’s throat and measures its vibration velocity (e.g., vocal-fold vibrations), as illustrated in Fig. Laser Doppler Vibrometry (LDV) has been widely used in engineering applications involving non-contact vibration and sound measurements.
This technique has also been used in some biomedical applications including hearing research. The detectable frequencies are in the range of near-DC to 1 GHz or higher. This paper reviews applications of LDV in biomedical engineering and Cited by: A review of recent experimental and theoretical results concerning laser diode self-mixing velocimetry is presented, showing that this technique can be deployed to measure velocity and vibration.
A number of vibration mode shape measurement techniques are described in which the measurement point of a Laser Doppler Vibrometer (LDV) is continuously scanned over the surface of a sinusoidally-excited structure. The LDV vibration output is an amplitude-modulated sine wave and mode.
The laser Doppler and phase Doppler techniques involve numerous complex physical processes and require a rather broad interdisciplinary understanding to be operated successfully. In this chapter the potentials of Laser Doppler Vibrometry (LDV) technique for the measure of vibration velocity on solid surfaces are presented.
LDV allows to perform vibration measurements without contact, eliminating the intrusivity of traditional devices. This makes LDV suitable for many applications, from noise&vibration analysis in.
Laser Doppler Velocimetry (LDV) is a non-contacting vibration technique capable of such measurements but vibration measurements on rotating structures using LDV have been shown to be ambiguous.
The sensitivity of the measured velocity to other rotor vibration components can be significant enough to mask the intended vibration measurement : John R. Bell. Non-contact optical/laser measuring techniques are very attractive in many engineering applications.
The paper demonstrates examples related to structural health monitoring. Various methods based on strain, vibration and ultrasound measurements are presented together with relevant references.
Applications examples utilise in-plane and out-of-plane measurements taken by 1-D and 3-D laser Cited by: This study proposes stationary and tracking laser Doppler vibrometer (LDV) based measurement techniques for vibration analysis of the rotating propeller. The vibration measurement setup consists of an LDV, a DAQ and control system, and the rotating propeller that contains five blades mounted to the shaft through a rotor.
An advantage of using a laser in production test applications is the laser can be aimed in such a way that the normal act of mounting the part in the test fixture is all that is necessary to position the part to ready it for the vibration measurement.
Laser vibrometers are portable, can measure from a safe distance and can measure directly on bearing housings or on a rotation : Gregg Palombo. measurements using laser doppler vibrometry: comprehensive theory and practical application This item was submitted to Loughborough University's Institutional Repository by the/an author.
Citation: BELL, J.R. and ROTHBERG, S.J., Rotational vibration mea-surements using laser doppler vibrometry: comprehensive theory and practical application. The measurements were done by laser Doppler interferometric methods measuring the velocities on the basis of the Doppler effect.
An LDV (Laser Doppler Vibrometer) device measured the translational vibrations, and then an LTV device measured the torsional vibrations (angular velocity changes) of the drill bit during : Miklós Béres, Béla Paripás. In contrast to the well-known laser Doppler vibrometry, which is an incremental technique, the laser Doppler position sensor enables non-incremental position measurements.
Hence, the absolute tip position is available for each passing blade permitting an evaluation of rotor vibrations, too. This is not possible with laser Doppler by: these measurement techniques.
These are typical cases where vibration measurements are necessary to bet-ter identify and characterise noise sources: in fact, the acoustic ﬁeld can be calculated by processing the vi-bratory velocity data measured on the source surface [2,10,13]. A laser Doppler scanning vibrometer  allows to.
Laser Doppler velocimetry, also known as laser Doppler anemometry, is the technique of using the Doppler shift in a laser beam to measure the velocity in transparent or semi-transparent fluid flows or the linear or vibratory motion of opaque, reflecting surfaces. The measurement with laser Doppler anemometry is absolute and linear with velocity and requires no pre-calibration.
Laser Doppler anemometry. Providing the first comprehensive treatment, this book covers all aspects of the laser Doppler and phase Doppler measurement techniques, including light scattering from small particles, fundamental optics, system design, signal and data processing, tracer particle generation, and applications in single and two-phase by:.
Laser Doppler vibrometry is now a well established technique enabling noncontact vibration measurements in the most challenging of environments. Rotor vibration measurements are often highlighted as a major application of laser vibrometers due to their noncontact operation and inherent immunity to shaft by: 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.beam, thus enabling non-contact, non-intrusive remote vibration measurements.
De-pending on the application and complexity, the price of these systems can reach tens of thousands of euros. The aim of this thesis is to develop and design a low cost laser vibrometer system that would enable remote vibrational frequency detection of a vibrating.