An overview and a contribution to the optical measurement of linear displacement

Girão, Pedro M.; Postolache, Octavian; Faria, J. A. Brandão; Pereira, M.

doi:10.1109/7361.983472

Cited by 60 publications

(22 citation statements)

References 40 publications

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“…As sensing principles we find intensity-modulated, time of flight, triangulation, confocal sensing, Doppler sensing, and interferometry sensing configurations (see Figure 3). An educative introduction is giving in [93] and to greater extend in [94], see also [95]. As an example of advanced application combining two techniques, Tong et al have visualized 3D-deformation and strain distributions with high resolution on an entire surface [96].…”

Section: Optical Techniquesmentioning

confidence: 99%

Measuring the magnetoelectric effect across scales

et al. 2015

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Magnetoelectric coupling is the material based coupling between electric and magnetic fields without recurrence to electrodynamics. It can arise in intrinsic multiferroics as well as in composites. Intrinsic multiferroics rely on atomistic coupling mechanisms, or coupled crystallographic order parameters, and even more complex mechanisms. They typically require operating temperatures much below T = 0°C in order to exhibit their coupling effects. Room temperature applications are thus excluded. Consequently, composites have been designed to circumvent this limitation. They rely on field coupling between magnetostrictive and piezoelectric materials or in more advanced scenarios on quantum coupling in between both phases.This overview will describe experimental techniques and their particular limitations in accessing these coupling phenomena at different scales. Strain coupling is the dominant coupling mechanism at the macroscale as well as down to the micrometer. At the nanoscale more subtle effects can arise and some care has to be taken when investigating local coupling at interfaces using scanning probe techniques, e. g. due to semiconductor effects, field screening, or gradient and surface effects. At the smallest length scale atomic or molecular coupling can be tested using X‐ray dichroism or probe atoms like 57Fe in Mössbauer spectroscopy. We display a selection of measuring techniques at the different scales and outline possible pitfalls for experimentalists as well as theoreticians when using material parameters extracted from such experimental work. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: Optical Techniquesmentioning

confidence: 99%

Measuring the magnetoelectric effect across scales

et al. 2015

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“…The common use of a displacement fiber optic sensor has already been described [9]- [11]. The configuration of the proposed displacement sensor is illustrated in Fig.…”

Section: High Resolution Sensor Principlementioning

confidence: 99%

A proposal for high-precision fiber optic displacement sensor

Noshad

Hedayati

Rostami

2006

2006 Asia-Pacific Microwave Conference

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In this paper an interesting high-precision optical displacement sensor based on fiber optics and intensity modulation is presented. The proposed sensor has below nm precision and so excellent for high precision measurement and instrumentation systems design and implementation. The proposed method is so easy for implementation and based on diffractive optics. With variation of the barrier the reflected intensity is varied and this is a measure for distance measurement.

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“…The light leaving the transmitting fiber is represented by a perfectly symmetrical con with divergence angle șa and vertex 0 located at a distance za inside the fiber [1]. In fig 4 we can see that there is small shift in plot i.e.…”

Section: Introductionmentioning

confidence: 96%

“…Recently several optical fiber sensors have already been used in practical application fields, which provide unique functions compared with other sensing principles [1].…”

Section: Introductionmentioning

confidence: 99%

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Bifurcated Optical Fiber Sensor for Weight Measurement System

Kumar¹,

Singh²,

Ojha³

2011

2011 International Conference on Computational Intelligence and Communication Networks

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Analyze some of the basic principles involved in the design of optical fiber based displacement sensor and to apply it to design a weight measurement system. Bifurcated optical fiber sensors can have many applications. Having high sensitivity to short distances, bifurcated optical fiber (Y-sensor) is well suited not only for control applications as position sensors, but also for gauging and surface assessment. In addition, they can be utilized as non contact pressure sensors if used in conjunction with reflective diaphragms moving in response to pressure. Y-sensor can also be applied as temperature transducer if used in conjunction with deformable bimetal sensors.

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An overview and a contribution to the optical measurement of linear displacement

Cited by 60 publications

References 40 publications

Measuring the magnetoelectric effect across scales

Measuring the magnetoelectric effect across scales

A proposal for high-precision fiber optic displacement sensor

Bifurcated Optical Fiber Sensor for Weight Measurement System

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