Multi-wavelength crosstalk-free photonic Doppler velocimetry

Barbarin, Y.; Blanc, Gaël Le; d’Almeida, Thierry; Hamrouni, Marin; Roudot, Marie; Luc, J.

doi:10.1063/5.0027331

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…This type of continuous imaging is stymied in PDV by the lack of suitable photocathodes at telecommunication wavelengths. Discrete PDV measurements can be implemented along line [43] or any fiber packing geometry. Multiplexing [21] is typically needed to support more than ∼16 PDV channels for spatially-resolved measurements.…”

Section: Appendix a Related Diagnosticsmentioning

confidence: 99%

Technology and times scales in Photonic Doppler Velocimetry (PDV)

Dolan

2024

Meas. Sci. Technol.

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Photonic Doppler Velocimetry (PDV) is a fiber-based measurement amenable to a wide range of experimental conditions. Interference between two optical signals---one Doppler shifted and the other not---is the essential principle in these measurements. A confluence of commercial technologies, largely driven by the telecommunication industry, make PDV particularly convenient at near-infrared wavelengths. This discussion considers how measurement time scales of interest relate to the design, operation, and analysis of a PDV measurement, starting from the steady state through nanosecond resolution. Benefits and outstanding challenges of PDV are summarized, with comparisons to related diagnostics.

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Section: Appendix a Related Diagnosticsmentioning

confidence: 99%

Technology and times scales in Photonic Doppler Velocimetry (PDV)

Dolan

2024

Meas. Sci. Technol.

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“…Then, PDV technology, frequency multiplexing technology, and time multiplexing speed measurement technology are used to restore and resolve the corresponding channel speed information [12]. The advantage is that it reduces the size, weight and cost of the velocimetry system and fulfills the need for an array or area coverage of measurement points on the object to be measured [13].…”

Section: Introductionmentioning

confidence: 99%

Research on three-dimensional velocimetry technology based on multiplexed photon Doppler

Sun,

Wu,

Wang

et al. 2024

Speckle 2023: VIII International Conference on Speckle Metrology

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Based on the photon Doppler velocimetry technology, this paper studies high-speed targets' three-dimensional (3D) velocimetry technology, reproduces the movement trajectory of high-speed targets through 3D coordinates and broadens the photon Doppler velocimetry technology application scope. First, design the multiplexed photonic Doppler velocimetry optical path structure and analyze the multiplexed photonic Doppler velocimetry principle. Then, the target 3D velocity extraction method is studied, including the fiber optic probe's spatial arrangement and the calculated method of target motion trajectory. Finally, the detection sensitivity of velocity in the direction of the 3D coordinate axis is analyzed. In order to verify the reliability of 3D velocimetry technology, the paper is described in two parts: software simulation and experiment. MATLAB is used to simulate the principle of 3D velocimetry technology. The simulation results show that 3D velocimetry technology can be realized by processing Doppler frequency shift voltage signals. In the experimental part, the high-speed target is detected through fixed-angle optical fiber probes, and four sets of Doppler frequency shift voltage signals are collected. After data processing, the target's 3D velocity is extracted, and the target's motion trajectory is reproduced. Therefore, this paper provides an idea for reproducing the target's motion trajectory by obtaining the high-speed target's 3D velocity.

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“…It has the advantages of high precision, high reliability, and reusability. Compared with the traditional laser speed measurement system, the PDV [1][2][3][4][5] speed measurement system has the advantages of strong anti-disturbance ability, large speed measurement range, good robustness of measurement results, etc., and is more suitable for vibration, impact and other measurement occasions with low signal-to-noise ratio and poor signal quality, such as high temperature, high speed and high pressure [6]. Since the year 2004 when the conventional PDV system was proposed by O.T.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry

Feng

et al. 2021

Sensors

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To study the law that governs the complex movements of the mechanism in the process of automatic weapon operation, the velocity tracking test technology of photon Doppler velocimetry is introduced to accurately measure velocity, displacement and acceleration, on the condition that there are long displacement and rapid velocity change. In the traditional way, out of interference signal time-frequency (TF) transformation draws TF distribution, and then by modulus maxima frequency extraction, comes to the law of velocity change. Due to the influence resulting from the change of fundamental signal as well as that of light intensity signal in the test, based on the TF distribution obtained by TF transformation, the traditional modulus maxima frequency extraction can extract frequency signals, but they show abnormal sudden changes at some moments, making the velocity discontinuous, unsmooth and unreal, which brings obvious errors to the subsequent calculation of acceleration and accurate displacement. Addressing the above-mentioned problems, this paper proposes a ridge extracting correction algorithm based on modulus maxima frequency extraction; this method, based on a large number of experiments where rodless cylinders are used to simulate the motion of a gun automatic mechanism, conducts a detailed calculation and analysis of the experimental results. A comparison of the two algorithms’ processing results, in terms of the speed, displacement and acceleration, suggests that the ridge extracting correction algorithm successfully corrects the frequency selection error, which draws a more continuous and, therefore, effective curve of the velocity change, and by so doing, the error of the displacement test (within 1.36 m displacement) is reduced from more than 3.6% to less than 0.58%, and the uncertainty dropped 97.07%. All these show that the accurate measurement of velocity, displacement and acceleration, with sudden and rapid velocity changes considered, is realized successfully.

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Multi-wavelength crosstalk-free photonic Doppler velocimetry

Cited by 4 publications

References 20 publications

Technology and times scales in Photonic Doppler Velocimetry (PDV)

Technology and times scales in Photonic Doppler Velocimetry (PDV)

Research on three-dimensional velocimetry technology based on multiplexed photon Doppler

Reconstruction of Velocity Curve in Long Stroke and High Dynamic Range Laser Interferometry

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