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Related Concept Videos

Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...
Torsional Pendulum01:09

Torsional Pendulum

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 by the...
Sound Waves: Resonance01:14

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...

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Ultrasonic Fatigue Testing in the Tension-Compression Mode
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Ultrasonic Fatigue Testing in the Tension-Compression Mode

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Ultrasonic rock sampling using longitudinal-torsional vibrations.

Andrea Cardoni1, Patrick Harkness, Margaret Lucas

  • 1Department of Mechanical Engineering, University of Glasgow, Glasgow G12 8QQ, UK. a.cardoni@mech.gla.ac.uk

Ultrasonics
|November 3, 2009
PubMed
Summary

Ultrasonic rock sampling offers a low-power, low-preload alternative for planetary rovers. Novel longitudinal-torsional ultrasonic samplers show promise for exobiological prospecting on Mars.

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Last Updated: Jun 19, 2026

Ultrasonic Fatigue Testing in the Tension-Compression Mode
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Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer

Published on: September 28, 2015

Area of Science:

  • Planetary Science
  • Robotics Engineering
  • Geophysics

Background:

  • Space missions like ExoMars require efficient surface rovers for sample collection.
  • Conventional rotary drills face limitations in power and preload requirements for planetary drilling.
  • Ultrasonic drilling technology presents a promising, low-power alternative for exobiological prospecting.

Purpose of the Study:

  • To propose two novel ultrasonic rock samplers utilizing a longitudinal-torsional composite mode.
  • To present the conceptual design of a full coring apparatus for preload delivery and core removal.
  • To evaluate the penetration capabilities of the developed ultrasonic drilling technology.

Main Methods:

  • Development of two novel ultrasonic rock samplers operating in a longitudinal-torsional composite mode.
  • Conceptual design of a coring apparatus for preload delivery and core removal.
  • Preliminary drilling trials using sandstone to assess penetration capability in Martian surface-analog material.

Main Results:

  • Successful demonstration of two novel ultrasonic rock samplers.
  • Conceptualization of a complete coring apparatus.
  • Preliminary trials confirmed the penetration capability of the composite vibrations in sandstone.

Conclusions:

  • Ultrasonic drilling technology is a viable and promising approach for planetary surface exploration.
  • The developed longitudinal-torsional composite mode ultrasonic samplers are suitable for exobiological prospecting.
  • Further development and testing are warranted for space mission applications.