Abstract：
:Traditional rotary corers and sample retrieval mechanisms for planetary drilling suffer from a variety of technical difficulties. A heavy and rigid drillstring must be assembled on-site and deployed with considerable applied preload and torque, and these mechanical loadings are difficult to react in a low gravity environment. Furthermore the entire drillstring must often be removed to retrieve samples, unless an augering approach is taken, in which case stratigraphic sequencing is lost. Ultrasonic tools which operate by converting an ultrasonic frequency to a low impacting frequency at the tool end can resolve the mechanical problems because they require very low applied preload and no torque to operate. In developing such a tool, however, several fundamental design decisions must be taken regarding the architecture of the transducer, horn and stack. These include the choice of solid or hollow transducers and the employment of single or multiple free-masses at the ultrasonic to low frequency conversion location. This paper addresses the layout of such a system by contrasting the pros and cons of these architectural choices and concludes that a solid system with a single free-mass provides the best performance in the parameter range here discussed.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Harkness P,Lucas M,Cardoni Adoi
10.1016/j.ultras.2011.06.001subject
Has Abstractpub_date
2011-12-01 00:00:00pages
1026-35issue
8eissn
0041-624Xissn
1874-9968pii
S0041-624X(11)00106-5journal_volume
51pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract：:Focused ultrasound holds promise in a large number of therapeutic applications. It has long been known that high intensity focused ultrasound can kill tissue through coagulative necrosis. However, it is only in recent years that practical clinical applications are becoming possible, with the development of high power ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.04.003
更新日期：2004-08-01 00:00:00
abstract：:This paper describes a laser optical technique for the detection of in-plane (IP) motion of ultrasonic waves propagating in solids. This interference-based laser optical technique includes a tiny square indentation with a width of about 30 microm on the sample surface and a relatively simple optical arrangement. The c...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.076
更新日期：2006-12-22 00:00:00
abstract：:This work was devoted to the development of a health monitoring system assigned to aerospace applications. Those applications concerned the detection of damaging impacts and debonding between stiffeners and composite skins, since they are the major causes of in-service damage of aircraft structures. The chosen health ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.01.058
更新日期：2004-04-01 00:00:00
abstract：:Chemical mechanical polishing (CMP) is the primary method to realize the global planarization of silicon wafer. In order to improve this process, a novel method which combined megasonic vibration to assist chemical mechanical polishing (MA-CMP) is developed in this paper. A matching layer structure of polishing head w...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.04.005
更新日期：2017-09-01 00:00:00
abstract：:Over the last two decades, more efficient transducers were developed for the generation and reception of air-borne ultrasound, thus enabling the non-contact, non-contaminating inspection of composite laminates and honeycomb structures widely used in the aerospace industry. This paper presents the fundamentals of makin...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.091
更新日期：2006-12-22 00:00:00
abstract：:Molecular techniques are transforming our understanding of cellular function and disease. However, accurate molecular analysis methods will be limited if the input DNA, RNA, or protein is not derived from pure population of cells or is contaminated by the wrong cells. A novel Ultrasonic Vibration Micro-dissection (UVM...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.06.010
更新日期：2006-12-22 00:00:00
abstract：:In this paper, an improved touch probe sensor device for higher sensitivity and low contact force is reported. In order to improve the resolution, we have evaluated the sensitivity and fabricated a miniaturized sensor. The sensor transducer was 3 mm long and had higher resonance frequency. The resonance frequency of t...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00091-4
更新日期：2002-05-01 00:00:00
abstract：:The present study investigated the effect of geometric parameters of the ultrasound instrument during meat salting in order to enhance salt diffusion and salt distribution in pork meat on a lab scale. The effects of probe size (∅2.5 and 1.3cm) and of different distances between the transducer and the meat sample (0.3,...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.03.017
更新日期：2018-02-01 00:00:00
abstract：:The increasing number of concrete structures with symptoms of premature deterioration due to environmental action demands procedures to estimate the durability of this type of component. Concrete durability is related to porosity, which determines the intensity of interactions of the material with aggressive agents. T...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00095-5
更新日期：2000-03-01 00:00:00
abstract：:Ultrasound evaluation permits the state of rocks to be determined quickly and cheaply, satisfying the demands faced by today's producers of ornamental stone, such as environmental sustainability, durability and safety of use. The basic objective of the present work is to analyse and develop the usefulness of ultrasoun...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.06.006
更新日期：2014-01-01 00:00:00
abstract：:Ultrasonics is an important diagnostic tool for bone diseases, as it allows for non-invasive assessment of bone tissue quality through mass density-elasticity relationships. The latter are, however, quite complex for fluid-filled porous media, which motivates us to develop a rigorous multiscale poromicrodynamics appro...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.12.005
更新日期：2014-07-01 00:00:00
abstract：:Discovery and evaluation concerns of barely visible impact damage in composite materials is a well-known issue in industries using these materials. This work proposes a frequency sweep method where damage assessment is conducted with respect to the time domain. Firstly, a combined linear and nonlinear ultrasound imagi...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.10.011
更新日期：2019-03-01 00:00:00
abstract：:It has been suggested that viscous losses, caused by the motion of myofibrils relative to their environmental fluid, could be the major cause of ultrasound attenuation in muscle. This Paper presents theoretical and experimental estimates of the viscous component of attenuation in suspensions of myofibrils. Experimenta...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(88)90046-7
更新日期：1988-01-01 00:00:00
abstract：:This research paper is the experimental study to investigate the effect of ultrasound sensitivity in the pure methane gas space as the pressure and sensor distance increases. We offer the solution to overcome the low sensitivity characteristics of ultrasonic sensors in the methane gas space. This proposal shows the ph...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.105970
更新日期：2019-11-01 00:00:00
abstract：:This paper establishes a model evaluating the signal loss of double transmitted acoustic beams through random rough liquid-solid surfaces based on Fresnel approximation and the phase-screen approximation. The numerical solution is replaced with a simple analytical solution through using the exponential substitution ap...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.05.007
更新日期：2011-01-01 00:00:00
abstract：:The paper presents an equivalent circuit model of the polymer coated surface acoustic wave (SAW) resonators by combining coupling-of-mode (COM) description of SAW resonators and perturbation calculation of SAW propagation under polymer loading. An expression for the motional load produced by polymer coating is deduced...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.12.006
更新日期：2011-07-01 00:00:00
abstract：:This article proposes to estimate slow blood flow with high frequency ultrasound imaging. The proposed technique combines 2 methods. First, a statistical method, called Speckle Flow Imaging (SFI) based on the analysis of changes in the speckle pattern along time, gives an index directly related to the total velocity v...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.06.025
更新日期：2006-12-22 00:00:00
abstract：:To understand the effect of the sound field on sonochemical luminescence, the exact sound pressure must be determined in each field. In this study it was determined by the Shlieren method, which measures the sound pressure without mixing the sound fields. We compared the efficiency of the sonochemical luminescence in ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00203-6
更新日期：2000-03-01 00:00:00
abstract：:An ultrasonic technique for imaging nonlinear scatterers, such as partially-closed cracks, buried in a medium has been recently proposed. The method called fundamental wave amplitude difference (FAD) consists of a sequence of acquisitions with different subsets of elements for each line of the image. An image revealin...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.02.003
更新日期：2019-07-01 00:00:00
abstract：:This paper reports the development of a two-dimensional thick film lead zirconate titanate (PZT) ultrasonic transducer array, operating at frequency approximately 7.5MHz, to demonstrate the potential of this fabrication technique for microparticle manipulation. All layers of the array are screen-printed then sintered ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.05.010
更新日期：2015-09-01 00:00:00
abstract：:The layer-multiple-scattering method is developed to study wave propagation through two-dimensional lattices of cylindrical inclusions in an elastic medium. The lattices are a series of periodically spaced infinite one-dimensional periodic gratings (or rows) of inclusions. The layer-multiple-scattering method allows t...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.09.002
更新日期：2006-12-01 00:00:00
abstract：:The aim of this paper is to investigate propagation characteristics and the generation mechanism of the nonlinear lowest-order symmetric Lamb mode (S0) which propagates downslope in free elastic plates with slowly linearly varying-thickness. From theoretical analyses, in a low frequency-thickness product (fd) range, t...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.11.013
更新日期：2019-04-01 00:00:00
abstract：:The objective of this paper is to present recent investigations in characteristics of the sound field generated by neurosurgical endoscopic ultrasonic probes (NEUPs) for minimally invasive surgery. The importance of this information has been investigated and discussed taking into account following facts: 1. According ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00217-2
更新日期：2002-05-01 00:00:00
abstract：:The paper investigates the existence of interfacial (Stoneley-type) acoustic waves localised at the internal boundary between two semi-infinite superlattices which are adjoined with each other to form one-dimensional phononic bicrystal. Each superlattice is a periodic sequence of perfectly bonded homogeneous and/or fu...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106237
更新日期：2021-01-01 00:00:00
abstract：:A new method of spatial compound imaging is presented that improves image quality without the usual requirement to decrease the frame rate. The new method of imaging utilizes three transducers for data acquisition. The transducer located at the center of the transducer system is a phased array probe that acts as both ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(03)00105-7
更新日期：2003-07-01 00:00:00
abstract：:A practical optodynamic study was performed to determine the usability of different lengths of laser pulses for the generation of ultrasonic transients in a solid material. The aim of the study was to evaluate the possibility of a dual use for a laser pulse-for laser material processing, on the one hand, and for the u...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.071
更新日期：2006-12-22 00:00:00
abstract：:The location of continuous acoustic emission sources is a difficult problem of non-destructive testing. This article describes one-dimensional location of continuous acoustic emission sources by using an intelligent locator. The intelligent locator solves a location problem based on learning from examples. To verify w...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00079-7
更新日期：2000-03-01 00:00:00
abstract：:To increase the sensitivity of Lamb waves to hidden corrosion in aircraft structures, a preliminary step is to understand the phenomena governing this interaction. A hybrid model combining a finite element approach and a modal decomposition method is used to investigate the interaction of Lamb modes with corrosion pit...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2007.02.004
更新日期：2007-06-01 00:00:00
abstract：:Mechanical properties of biological tissue represent important diagnostic information and are of histological and pathological relevance. In order to obtain non-invasively mechanical properties of tissue, we developed a real-time strain imaging system for clinical applications. The output data of this system also allo...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.06.007
更新日期：2006-12-22 00:00:00
abstract：:The present study focuses on a possibility for improving NO removal efficiency from flue gas by application of powerful sound waves. The sound waves (frequency 6.9-17.2kHz, intensity 144-160dB) are propagated from Hartmann sound generators to a preheated graphite disk inside a vertical reaction tube (height 1.8m, I.D....
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.06.010
更新日期：2005-02-01 00:00:00
