Compact Laser-Diode Instrument for Flow Measurement

We demonstrate a flow-meter sensor using a bare laser diode (LD) as a self-mixing interferometer and no additional lens nor optical component. The diode is placed directly on the edge of the duct, exploiting the natural laser divergence. The flow measurement is based on the Doppler shift induced by the scattering particles inside the fluid and read by the self-mixing effect inside the LD. The proposed approach has been modeled by a numerical simulator in order to find the best signal processing algorithm. A set of measurements on blood proves good performances as a flow meter, while simulations confirm the system robustness to mechanical misalignments and changes in liquid properties.

[1]  Alessandro Magnani,et al.  Real-Time Self-Mixing Interferometer for Long Distances , 2014, IEEE Transactions on Instrumentation and Measurement.

[2]  Michitsugu Mori,et al.  A study of ultrasonic propagation for ultrasonic flow rate measurement , 2008 .

[3]  Yah Leng Lim,et al.  GaN laser self-mixing velocimeter for measuring slow flows. , 2010, Optics letters.

[4]  Shigenobu Shinohara,et al.  A Comparative Study for the Assessment on Blood Flow Measurement Using Self-Mixing Laser Speckle Interferometer , 2008, IEEE Transactions on Instrumentation and Measurement.

[5]  Luigi Rovati,et al.  Measurement of the fluid-velocity profile using a self-mixing superluminescent diode , 2011 .

[6]  Cameron Tropea,et al.  Laser Doppler anemometry: recent developments and future challenges , 1995 .

[7]  Luigi Rovati,et al.  Low-Cost Optical Flowmeter With Analog Front-End Electronics for Blood Extracorporeal Circulators , 2010, IEEE Transactions on Instrumentation and Measurement.

[8]  M. Norgia,et al.  Self-Mixing Laser Doppler Spectra of Extracorporeal Blood Flow: A Theoretical and Experimental Study , 2012, IEEE Sensors Journal.

[9]  M. Norgia,et al.  Interferometric measurements of displacement on a diffusing target by a speckle tracking technique , 2001 .

[10]  Terence King,et al.  Particle sizing and flow measurement using self-mixing interferometry with a laser diode , 2005 .

[11]  Guido Giuliani,et al.  Self-mixing differential vibrometer based on electronic channel subtraction. , 2006, Applied optics.

[12]  A Pesatori,et al.  High resolution self-mixing laser rangefinder. , 2012, The Review of scientific instruments.

[13]  A. Pesatori,et al.  Laser diode for flow-measurement , 2015, 2015 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings.

[14]  Guido Giuliani,et al.  Laser diode self-mixing technique for sensing applications , 2002 .

[15]  M Norgia,et al.  Optical system for liquid level measurements. , 2014, The Review of scientific instruments.

[16]  Alessandro Magnani,et al.  Self-mixing vibrometer with real-time digital signal elaboration. , 2012, Applied optics.

[17]  A. L. Weijers,et al.  Fiber-coupled self-mixing diode-laser Doppler velocimeter: technical aspects and flow velocity profile disturbances in water and blood flows. , 1994, Applied optics.

[18]  S. Donati.  Developing self‐mixing interferometry for instrumentation and measurements , 2012 .

[19]  Anne Humeau-Heurtier,et al.  Self-mixing microprobe for monitoring microvascular perfusion in rat brain , 2012, Medical & Biological Engineering & Computing.

[20]  Guido Giuliani,et al.  Absolute Distance Measurement With Improved Accuracy Using Laser Diode Self-Mixing Interferometry in a Closed Loop , 2007, IEEE Transactions on Instrumentation and Measurement.

[21]  Yah Leng Lim,et al.  Self-mixing flow sensor using a monolithic VCSEL array with parallel readout. , 2009, Optics express.

[22]  Julien Perchoux,et al.  Flow profile measurement in microchannel using the optical feedback interferometry sensing technique , 2013 .

[23]  Cesare Svelto,et al.  Novel Measurement Method for Signal Recovery in Optical Vibrometer , 2008, IEEE Transactions on Instrumentation and Measurement.

[24]  Michele Norgia,et al.  Optical flow sensor through near-field grating diffraction , 2013 .

[25]  C. Willert,et al.  Digital particle image velocimetry , 1991 .

[26]  S. Ozdemir,et al.  Noninvasive blood flow measurement using speckle signals from a self-mixing laser diode: in vitro and in vivo experiments , 2000 .

[27]  Silvano Donati,et al.  A displacement-measuring instrument utilizing self-mixing interferometry , 2003, IEEE Trans. Instrum. Meas..

[28]  Satoshi Ito,et al.  Self-mixing laser speckle velocimeter for blood flow measurement , 2000, IEEE Trans. Instrum. Meas..

[29]  D. Y. Solandt,et al.  Propagation of the measurement uncertainty for the numerical reconstruction of holograms in Fresnel approximation , 2018, Speckle: International Conference on Speckle Metrology.