The design and operation of new viscometers are often presented with a focus on the miniaturization of the device and online monitoring of small amounts of liquid samples. The vibrational viscometers commonly used for viscosity measurements exploit the peak value of the frequency-response curve obtained from excitations of the oscillator submerged in the liquid. However, for high-viscosity liquids, the peak of the frequency-response curve is ambiguous or nonexistent, and hence hard to measure. To overcome this drawback and with a view to miniaturizing the device, we use the self-excited oscillations produced by a velocity feedback control. Our design uses a viscometer employing a cantilever driven by a piezo-actuator with analytics that do not rely on the frequency-response curve. A prototype piezo-driven macrocantilever with an oscillating plate attached at its tip was experimentally performed according to specifications. The proposed mechanism can be integrated into microelectromechanical systems (MEMS).

References

References
1.
Shi
,
X.
, and
BeMiller
,
J. M.
,
2002
, “
Effects of Food Gums on Viscosities of Starch Suspensions During Pasting
,”
Carbohydr. Polym.
,
50
(
1
), pp.
7
18
.
2.
Livak-Dahl
,
E.
,
Lee
,
J.
, and
Burns
,
M. A.
,
2013
, “
Nanoliter Droplet Viscometer With Additive-Free Operation
,”
Lab Chip
,
13
(
2
), pp.
297
301
.
3.
Srivastava
,
N.
,
2006
, “
Analysis of Non-Newtonian Liquids Using a Microfluidic Capillary Viscometer
,”
Anal. Chem.
,
78
(
5
), pp.
1690
1696
.
4.
Pop
,
G.
,
de Backer
,
T.
,
de Jong
,
M.
,
Struijk
,
P.
,
Moraru
,
L.
,
Chang
,
Z.
,
Goovaerts
,
H.
,
Slager
,
C.
, and
Bogers
,
A.
,
2004
, “
On-Line Electrical Impedance Measurement for Monitoring Blood Viscosity During On-Pump Heart Surgery
,”
Eur. Surg. Res.
,
36
(
5
), pp.
259
265
.
5.
Markova
,
L. V.
,
Makarenko
,
V. M.
,
Semenyuk
,
M. S.
, and
Zozulya
,
A. P.
,
2010
, “
On-Line Monitoring of the Viscosity of Lubricating Oils
,”
J. Frict. Wear
,
31
(
6
), pp.
433
442
.
6.
Smith
,
P.
,
Young
,
R.
, and
Chatwin
,
C.
,
2010
, “
A MEMS Viscometer for Unadulterated Human Blood
,”
J. Int. Meas. Confed.
,
43
(
1
), pp.
144
151
.
7.
Srivastava
,
N.
,
Davenport
,
R. D.
, and
Burns
,
M. A.
,
2005
, “
Nanoliter Viscometer for Analyzing Blood Plasma and Other Liquid Samples
,”
Anal. Chem.
,
77
(
2
), pp.
383
392
.
8.
Endo
,
H.
,
Sode
,
K.
,
Karube
,
I.
, and
Muramatsu
,
H.
,
1990
, “
On-Line Monitoring of the Viscosity in Dextran Fermentation Using Piezoelectric Quartz Crystal
,”
Biotechnol. Bioeng.
,
36
(
6
), pp.
636
641
.
9.
Lee
,
I.
,
Park
,
K.
, and
Lee
,
J.
,
2012
, “
Note: Precision Viscosity Measurement Using Suspended Microchannel Resonators
,”
Rev. Sci. Instrum.
,
83
(
11
), p.
116106
.
10.
Sader
,
J. E.
,
1998
, “
Frequency Response of Cantilever Beams Immersed in Viscous Fluids With Applications to the Atomic Force Microscope
,”
J. Appl. Phys.
,
84
(
1
), pp.
64
76
.
11.
Yabuno
,
H.
,
Higashino
,
K.
,
Kuroda
,
M.
, and
Yamamoto
,
Y.
,
2014
, “
Self-Excited Vibrational Viscometer for High-Viscosity Sensing
,”
J. Appl. Phys.
,
116
(
12
), p.
124305
.
12.
Sone
,
H.
,
Fujinuma
,
Y.
, and
Hosaka
,
S.
,
2004
, “
Picogram Mass Sensor Using Resonance Frequency Shift of Cantilever
,”
Jpn. J. Appl. Phys.
,
43
(
6A
), pp.
3648
3651
.
13.
Yabuno
,
H.
,
Kuroda
,
M.
,
Someya
,
T.
,
Hayashi
,
K.
, and
Ashida
,
K.
,
2011
, “
Van der Pol-Type Self-Excited Microcantilever Probe for Atomic Force Microscopy
,”
Jpn. J. Appl. Phys.
,
50
(
7
), p.
076601
.
14.
Yabuno
,
H.
,
Seo
,
Y.
, and
Kuroda
,
M.
,
2013
, “
Self-Excited Coupled Cantilevers for Mass Sensing in Viscous Measurement Environments
,”
Appl. Phys. Lett.
,
103
(
6
), p.
063104
.
15.
Morita
,
T.
,
2003
, “
Miniature Piezoelectric Motors
,”
Sens. Actuators, A
,
103
(
3
), pp.
291
300
.
16.
Goodwin
,
A. R. H.
,
Fitt
,
A. D.
,
Ronaldson
,
K. A.
, and
Wakeham
,
W. A.
,
2006
, “
A Vibrating Plate Fabricated by the Methods of Microelectromechanical Systems (MEMS) for the Simultaneous Measurement of Density and Viscosity: Results for Argon at Temperatures Between 323 and 423 K at Pressures up to 68 MPa
,”
Int. J. Thermophys.
,
27
(
6
), pp.
1650
1676
.
17.
Rezazadeh
,
G.
,
Ghanbari
,
M.
,
Mirzaee
,
I.
, and
Keyvani
,
A.
,
2010
, “
On the Modeling of a Piezoelectrically Actuated Microsensor for Simultaneous Measurement of Fluids Viscosity and Density
,”
J. Int. Meas. Confed.
,
43
(
10
), pp.
1516
1524
.
18.
Landau
,
L. D.
, and
Lifshitz
,
E. M.
,
1989
,
Fluid Mechanics
(Course of Theoretical Physics, Vol. 6),
2 ed.
,
Pergamon Press
,
Oxford, UK
.
19.
Abel
,
P. B.
,
Eppell
,
S. J.
,
Walker
,
A. M.
, and
Zypman
,
F. R.
,
2015
, “
Viscosity of Liquids Form the Transfer Function of Microcantilevers
,”
Measurement
,
61
, pp.
67
74
.
20.
Fedorchenko
,
A. I.
,
Stachiv
,
I.
, and
Wang
,
W.
,
2013
, “
Method of the Viscosity Measurement by Means of the Vibrating Micro/Nano-Mechanical-Resonators
,”
Flow Meas. Instrum.
,
32
, pp.
84
89
.
21.
Oueini
,
S. S.
,
Nayfeh
,
A. H.
, and
Pratt
,
J. R.
,
1998
, “
A Nonlinear Vibration Absorber for Flexible Structures
,”
Nonlinear Dyn.
,
15
(
3
), pp.
259
282
.
22.
Yabuno
,
H.
,
Kunitho
,
Y.
, and
Kashimura
,
T.
,
2008
, “
Analysis of the Van der Pol System With Coulomb Friction Using the Method of Multiple Scales
,”
ASME J. Vib. Acoust.
,
130
(
4
), p.
041008
.
23.
Lau
,
W. R.
,
Hwang
,
C.-A.
,
Brugge
,
H. B.
,
Iglesias-Silva
,
G. A.
,
Duarte-Garza
,
H. A.
,
Rogers
,
W. J.
,
Hall
,
K. R.
, and
Holste
,
J. C.
,
1997
, “
A Continuously Weighed Pycnometer for Measuring Fluid Properties
,”
J. Chem. Eng. Data
,
42
(
4
), pp.
738
744
.
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