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| Number | Title | Issue Date |
| 7107159 | Systems and methods to determine elastic properties of materials The present invention provides systems and methods to used a measured driving-point response of a nonlinear material to determined one or more elastic properties of the material. The present invention takes advantage of the full information represented by the transi... | 09/12/2006 |
| 6722201 | Method and device for determining vibration characteristics of vibrated articles such as eggs This invention relates to a device for determining vibration characteristics of vibrated, supported, generally round, substantially ellipsoid articles, such as eggs, comprising: an elastic hammer with handle and head, for tapping and thereby acoustically vibr... | 04/20/2004 |
| 6289734 | In-situ non-destructive audiosonic identification system for visco-elastic materials The present invention provides a portable test system for in-situ, non-destructive identification of visco-elastic material. The system includes a probe-like member coupled to a controller, wherein the controller is responsive to an output signal from the... | 09/18/2001 |
| 6155116 | Acoustic treatment performance testing A method and system for acoustic treatment performance testing in a free-ld acoustic environment is provided. A sound source directs a gated acoustic pulse at an acoustic treatment. Acoustic pressures of the gated acoustic pulse and reflected energy from... | 12/05/2000 |
| 5563458 | Apparatus and method for sensing surface flexure Apparatus for sensing the flexure of a surface includes an array of bistable dome shaped switches within the surface which change their state or position depending on the direction and degree of local flexure of the surface. A flexible sheet parallel to t... | 10/08/1996 |
| 5365457 | In situ dynamic material property measurement system Material is periodically indented by a probe driven at an oscillation frency by a shaker regulated by an analyzer to which input measurement data is fed from a sensing head connecting the shaker to the probe for in situ measurement of material resistance... | 11/15/1994 |
| 5363701 | Material characterizing system A plurality of elongated test specimens undergo vibrations induced by ran noise within an acoustical frequency range establishing standing waves therein having resonant frequencies at which the collection of measurement data through accelerometers mounte... | 11/15/1994 |
| 5345825 | Material characterizing system A plurality of elongated test specimens undergo vibrations induced by ran noise within an acoustical frequency range establishing standing waves therein having resonant frequencies at which the collection of measurement data through accelerometers mounte... | 09/13/1994 |
| 5277200 | Probe having a giant magnetostrictive material for organism diagnosis A probe has a vibration excitor including a core member made of a giant magnetostrictive material and magnetic field generation means for generating an alternating magnetic field having a randomly varying frequency to thereby expand and compress the core ... | 01/11/1994 |
| 5099848 | Method and apparatus for breast imaging and tumor detection using modal vibration analysis A system for using Doppler modulation parameters for producing an estimation of the vibration amplitude of an object under investigation is disclosed in which a low frequency vibration source is used to force the oscillation of the object under investigat... | 03/31/1992 |
| 5081870 | Method and apparatus for determining dynamic mechanical properties of materials A method and apparatus is provided for dynamic mechanical measurements of materials in which a plurality of coplanar coils are disposed transversely with respect to a magnetic flux field. The coils are rigidly mounted to a plate and arranged so as to elim... | 01/21/1992 |
| 4771792 | Non-invasive determination of mechanical characteristics in the body A non-invasive system and method for inducing vibrations in a selected element of the human body and detecting the nature of responses for determining mechanical characteristics of the element are provided. The method comprises the steps of: inducing mult... | 09/20/1988 |
| 4646754 | Non-invasive determination of mechanical characteristics in the body A non-invasive system and method for inducing vibrations in a selected element of the human body and detecting the nature of responses for determining mechanical characteristics of the element are provided. The method comprises the steps of: inducing mult... | 03/03/1987 |
| 4418573 | Method for measuring material characteristics A fast and reliable method is disclosed for measuring the dynamic mechanical properties of a material, particularly its modulus of elasticity and loss factor. By this method the acoustic characteristics of a material can be determined. An elongate strip o... | 12/06/1983 |
| 4352292 | Instrument for measuring dynamic viscoelastic properties A method and apparatus for measuring the dynamic material constants of rur compounds. The rubber compound is tested in strip form by attaching one end of the strip to an electromechanical shaker while the opposite end of the strip is suspended under cons... | 10/05/1982 |
| 4177798 | Apparatus for measuring the mechanical characteristics of a material such as living skin An apparatus for measuring mechanical characteristics of a material capable of transmitting vibration, particularly skin of a living subject. An impulse from a generator such as a small hammer causes a disturbance to propagate a wave along the material. A... | 12/11/1979 |
| 3933032 | Dynamic rheometer The dynamic mechanical properties of polymeric materials can be measured either in uniaxial compression or in flexure as a function of frequency over a wide frequency as well as temperature range, by using a piezoelectric driver to apply a displacement to... | 01/20/1976 |
