Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Torsional Pendulum01:09

Torsional Pendulum

6.5K
A torsional pendulum involves the oscillation of a rigid body in which the restoring force is provided by the torsion in the string from which the rigid body is suspended. Ideally, the string should be massless; practically, its mass is much smaller than the rigid body's mass and is neglected.
As long as the rigid body's angular displacement is small, its oscillation can be modeled as a linear angular oscillation. The amplitude of the oscillation is an angle. The role of mass is played...
6.5K
Damped Oscillations01:07

Damped Oscillations

6.5K
In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
Although friction and other non-conservative...
6.5K
Simple Harmonic Motion01:21

Simple Harmonic Motion

11.7K
Simple harmonic motion is the name given to oscillatory motion for a system where the net force can be described by Hooke's law. If the net force can be described by Hooke's law and there is no damping (by friction or other non-conservative forces), then a simple harmonic oscillator will oscillate with equal displacement on either side of the equilibrium position. To derive an equation for period and frequency, the equation of motion is used. The period of a simple harmonic oscillator is given...
11.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Nonlinear Dynamic Response of Nanocomposite Microbeams Array for Multiple Mass Sensing.

Nanomaterials (Basel, Switzerland)·2023
Same author

Self-Excited Microcantilever with Higher Mode Using Band-Pass Filter.

Sensors (Basel, Switzerland)·2023
See all related articles

Related Experiment Video

Updated: Nov 18, 2025

Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring
07:02

Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring

Published on: November 14, 2025

13

Sensorless Self-Excited Vibrational Viscometer with Two Hopf Bifurcations Based on a Piezoelectric Device.

Shinpachiro Urasaki1, Hiroshi Yabuno1, Yasuyuki Yamamoto2

  • 1Graduate School of System and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan.

Sensors (Basel, Switzerland)
|February 10, 2021
PubMed
Summary

This study introduces a novel sensorless viscometer using piezoelectric devices for high-sensitivity viscosity measurement. The new method detects frequency jumps, offering improved accuracy over traditional viscometers.

Keywords:
Hopf bifurcationdouble Hopf bifurcationjump phenomenonpiezoelectric devicesensorless self-excited oscillationviscometer

More Related Videos

A Polymer-based Piezoelectric Vibration Energy Harvester with a 3D Meshed-Core Structure
09:51

A Polymer-based Piezoelectric Vibration Energy Harvester with a 3D Meshed-Core Structure

Published on: February 20, 2019

25.7K
Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer
09:21

Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer

Published on: September 28, 2015

12.8K

Related Experiment Videos

Last Updated: Nov 18, 2025

Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring
07:02

Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring

Published on: November 14, 2025

13
A Polymer-based Piezoelectric Vibration Energy Harvester with a 3D Meshed-Core Structure
09:51

A Polymer-based Piezoelectric Vibration Energy Harvester with a 3D Meshed-Core Structure

Published on: February 20, 2019

25.7K
Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer
09:21

Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer

Published on: September 28, 2015

12.8K

Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Physics

Background:

  • Viscosity is a critical parameter across various scientific and industrial fields.
  • Traditional self-excited oscillation viscometers often require displacement sensors, potentially limiting sensitivity.
  • Piezoelectric devices offer unique electromechanical coupling for sensing applications.

Purpose of the Study:

  • To develop a high-sensitivity sensorless viscometer utilizing piezoelectric self-excited oscillation.
  • To leverage the interaction between mechanical and electrical dynamics for viscosity measurement.
  • To overcome the limitations of existing viscometers requiring displacement sensors.

Main Methods:

  • Utilizing a piezoelectric device integrated with a cantilever for sensorless self-excited oscillation.
  • Analyzing the fourth-order dynamics and coupled oscillator systems exhibiting Hopf bifurcations.
  • Measuring the distance between response frequency jumps at Hopf bifurcation points as an indicator of viscosity.

Main Results:

  • The proposed sensorless viscometer demonstrates high sensitivity in viscosity measurements.
  • The distance between frequency jumps at Hopf bifurcations is directly dependent on viscosity.
  • Experimental results confirm higher sensitivity compared to sensor-based self-excited oscillation methods.

Conclusions:

  • The developed sensorless viscometer effectively measures viscosity with enhanced sensitivity.
  • The frequency jump phenomenon provides a robust and easily detectable metric for viscosity.
  • This technology offers a promising alternative for accurate and sensitive viscosity determination.