Directional discrimination in Doppler anemometry (LDA) without frequency shifting using twinned optical fibres in the receiving optics

Karsten Plamann; Holger Zellmer; Jürgen Czarske; Andreas Tünnermann

doi:10.1088/0957-0233/9/11/008

Directional discrimination in Doppler anemometry (LDA) without frequency shifting using twinned optical fibres in the receiving optics

Karsten Plamann
, Holger Zellmer
, Jürgen Czarske
, Andreas Tünnermann

Research output: Contribution to journal › Article › peer-review

Abstract

We present a simple method for directional discrimination in laser Doppler anemometry (LDA) without using frequency shifting components. The measuring volume is imaged onto a twinned pair of receiving fibres, each of semi-circular cross section, which permit the separate detection of the leading and trailing part of the burst signal, thus revealing the sign of the velocity component without the need for frequency shifting elements. Besides being very straightforward and inexpensive, this method is particularly apt for fibre coupled LDA measuring devices.

Original language	English
Pages (from-to)	1840-1846
Number of pages	7
Journal	Measurement Science and Technology
Volume	9
Issue number	11
DOIs	https://doi.org/10.1088/0957-0233/9/11/008
Publication status	Published - 1 Jan 1998
Externally published	Yes

Keywords

Laser Doppler velocimeters
Laser applications in metrology
Measurement of velocities

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10.1088/0957-0233/9/11/008

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abstract = "We present a simple method for directional discrimination in laser Doppler anemometry (LDA) without using frequency shifting components. The measuring volume is imaged onto a twinned pair of receiving fibres, each of semi-circular cross section, which permit the separate detection of the leading and trailing part of the burst signal, thus revealing the sign of the velocity component without the need for frequency shifting elements. Besides being very straightforward and inexpensive, this method is particularly apt for fibre coupled LDA measuring devices.",

keywords = "Laser Doppler velocimeters, Laser applications in metrology, Measurement of velocities",

author = "Karsten Plamann and Holger Zellmer and J{\"u}rgen Czarske and Andreas T{\"u}nnermann",

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AU - Plamann, Karsten

AU - Zellmer, Holger

AU - Czarske, Jürgen

AU - Tünnermann, Andreas

PY - 1998/1/1

Y1 - 1998/1/1

N2 - We present a simple method for directional discrimination in laser Doppler anemometry (LDA) without using frequency shifting components. The measuring volume is imaged onto a twinned pair of receiving fibres, each of semi-circular cross section, which permit the separate detection of the leading and trailing part of the burst signal, thus revealing the sign of the velocity component without the need for frequency shifting elements. Besides being very straightforward and inexpensive, this method is particularly apt for fibre coupled LDA measuring devices.

AB - We present a simple method for directional discrimination in laser Doppler anemometry (LDA) without using frequency shifting components. The measuring volume is imaged onto a twinned pair of receiving fibres, each of semi-circular cross section, which permit the separate detection of the leading and trailing part of the burst signal, thus revealing the sign of the velocity component without the need for frequency shifting elements. Besides being very straightforward and inexpensive, this method is particularly apt for fibre coupled LDA measuring devices.

KW - Laser Doppler velocimeters

KW - Laser applications in metrology

KW - Measurement of velocities

U2 - 10.1088/0957-0233/9/11/008

DO - 10.1088/0957-0233/9/11/008

M3 - Article

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JO - Measurement Science and Technology

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IS - 11

ER -

Directional discrimination in Doppler anemometry (LDA) without frequency shifting using twinned optical fibres in the receiving optics

Abstract

Keywords

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