An ESPI system for determining in-plane deformations. Three-dimensional analysis of the carrier fringes and a proposal for analysis of transient in-plane deformations

Hurtado-Ramos, Juan B.; Blanco-García, Jesús; Fernández, Antonio; Ribas, F

doi:10.1088/0957-0233/12/5/312

Cited by 6 publications

(1 citation statement)

References 18 publications

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“…However, the measurement is not continuously. For in-plane measurement of the displacement, speckle techniques and image processing will be used [6,7] . By image processing methods, the image sequence of rotating object is recorded by the use of stroboscopic light (illumination and camera triggered by each other) or by a high speed camera.…”

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Optical vibration and deviation measurement of rotating machine parts

Reithmeier

Mirzaei

Kasyanenko

2008

Optoelectron. Lett.

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It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer (LDV).Most rotating machinery parts do not only rotate, they are often subjected to additional excitations. These excitations can lead to minor performance and more wear and finally to the destruction of these components. Hence, it is of interest to have appropriate information about deformations and deviations caused by external excitations. Examples for these effects are processes with cut off wheels grinding wheels, once they are interconnected with different materials, turbine blades under heavy loads of air or fluid as well as brake discs or bearings under operational conditions. In all these applications, analyses of the dynamic behaviour of rotary machine parts are desirable. This can be described by the length and direction of the displacement vector of any material fixed point during its run time.This displacement vector, caused by the external excitations, can be split into two components. Namely into in-plane displacements which take place inside the rotational plane. They are mainly caused by the fluctuating rotational speed, which is always present. Secondly, out-of-plane displacements take place into direction of the rotational axes, mainly caused by lateral loads (Fig. 1).To measure the deformation and vibration of the rotating objects, the displacement vector of any material fixed point between the relaxed position and the position of the same point under load should be determined. This vector can be defined and split relative to body fixed frame, dependent on the measurement methods (Fig. 2).There are several methods to measure the out-of-plane displacement, like holographic interferometry and laser Fig.

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confidence: 99%

Optical vibration and deviation measurement of rotating machine parts

Reithmeier

Mirzaei

Kasyanenko

2008

Optoelectron. Lett.

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Application of virtual phase-shifting speckle-interferometry for detection of polymorphism in the Chlamydia trachomatis omp1 gene

Feodorova

Saltykov

Zaytsev

et al. 2018

Saratov Fall Meeting 2017: Optical Technologies in Biophysics and Medicine XIX

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FLOW-RATE MEASUREMENT IN TWO-PHASE FLOW

Oddie¹,

Pearson²

2004

Annu. Rev. Fluid Mech.

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▪ Abstract Online, continuous, two-phase flow measurement is often necessary, particularly in the oil and gas industry. In this article, we describe some of the commercially most important techniques for gas-liquid, gas-solid, liquid-solid, and liquid-liquid flows, and provide associated illustrative sketches and regime maps. These techniques involve Venturi pressure drop, Coriolis, electromagnetic, and cross-correlation flow meters, gamma-ray absorption and gradio-manometer densitometers, and local electrical and fiber-optic sensors, for which we describe the principles of operation and interpretation. References are given to more comprehensive texts and papers; these are representative rather than exhaustive. It is emphasized that empirical calibration is the norm and that detailed fluid-mechanical analysis has so far played little part in instrument design and operation.

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An ESPI system for determining in-plane deformations. Three-dimensional analysis of the carrier fringes and a proposal for analysis of transient in-plane deformations

Cited by 6 publications

References 18 publications

Optical vibration and deviation measurement of rotating machine parts

Optical vibration and deviation measurement of rotating machine parts

Application of virtual phase-shifting speckle-interferometry for detection of polymorphism in the Chlamydia trachomatis omp1 gene

FLOW-RATE MEASUREMENT IN TWO-PHASE FLOW

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