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| Number | Title | Issue Date |
| 7348713 | Ultrasonic probe An ultrasonic probe includes a plurality of transducers arranged in XY directions, a plurality of backing members stacked along the X or Y direction, in back of the transducers, and a plurality of heat conductive sheets sandwiched between the plurality of backing me... | 03/25/2008 |
| 7348712 | Ultrasonic probe and ultrasonic diagnostic apparatus An ultrasonic probe includes ultrasonic piezoelectric elements that are arranged in a first direction at predetermined intervals and transmit and receive ultrasonic waves in a second direction substantially orthogonal to the first direction. The respective ultrasoni... | 03/25/2008 |
| 7325456 | Interrogation network patches for active monitoring of structural health conditions Apparatus for monitoring structural health conditions of structures. The apparatus includes a piezoelectric device that has a bottom cover plate, piezoelectric rings concentrically disposed with respect to an axis and positioned on the bottom cover plate, and concen... | 02/05/2008 |
| 7290454 | Pressure flow sensor systems and pressure flow sensors for use therein A differential pressure flow sensor system comprises a disposable flow sensor which has upstream and downstream pressure sensing devices for detecting a differential pressure in a flow channel. Each sensing device comprises a diaphragm, a capacitor and an inductor e... | 11/06/2007 |
| 7284429 | Micromachined double tuning-fork gyrometer with detection in the plane of the machined wafer The invention relates to a gyrometer based on a vibrating structure, produced by micromachining in a thin planar wafer. It comprises four moving assemblies placed at the vertices of a virtual rectangle, each moving assembly being coupled to two moving assemblies loc... | 10/23/2007 |
| 7237564 | Distribution of energy in a high frequency resonating wafer processing system A transducer for use in an acoustic energy cleaner is provided. The transducer includes a resonator and a plurality of crystals bonded to a surface of the resonator. The plurality of crystals is configured to be bonded to the surface of the resonator in a staggered ... | 07/03/2007 |
| 7239577 | Apparatus and methods for multicomponent marine geophysical data gathering In one embodiment the invention comprises a particle velocity sensor that includes a housing with a geophone mounted in the housing. A fluid that substantially surrounds the geophone is included within the housing. The particle velocity sensor has an acoustic impeda... | 07/03/2007 |
| 7224104 | Ultrasonic probe and ultrasonic diagnostic apparatus An ultrasonic probe includes a piezoelectric oscillator layer having plural arranged piezoelectric oscillators for transmitting and receiving ultrasonic waves and plural electrodes formed in the piezoelectric oscillators, an acoustic lens for focusing or diffusing t... | 05/29/2007 |
| 7194390 | Predictor of minimal noise figure for wideband amplifier A predictor allows the computation of the greatest lower bound of the noise figure pertaining uniformly over the operating band of a wideband amplifier. This computation is done directly from noise-parameter data of the amplifier. ... | 03/20/2007 |
| 7165298 | Method of making a surface acoustic wave device A surface acoustic wave die system and method are disclosed herein, including a surface acoustic wave sensor comprising one or more surface acoustic wave die disposed and hermetically sealed between a base and a cover. An adhesive is generally for securing one or mo... | 01/23/2007 |
| 7146861 | Disposable and trimmable wireless pressure sensor A disposable pressure sensor includes a substrate and a pressure diaphragm formed upon the substrate. A sensor coil can be provided, comprising a capacitor and an inductor formed on the substrate and surrounded by the pressure diaphragm. The ferrite core is located ... | 12/12/2006 |
| 7148611 | Multiple function bulk acoustic wave liquid property sensor A multifunction sensor based on a bulk acoustic wave (BAW) device can be used to obtain measurements of a liquid's corrosivity, viscosity, and conductance. A front electrode and a back electrode can be used to excite vibrations in a piezoelectric substrate. Vibratio... | 12/12/2006 |
| 7149151 | Ultrasound transducer for application in extreme climatic conditions The invention relates to an ultrasound transducer in particular for application in ultrasound anemometry, comprising an electromechanical transducer (1) with an acoustically active surface, an acoustic matching layer (3) arranged between the acoustic s... | 12/12/2006 |
| 7134319 | Acoustic wave sensor with reduced condensation and recovery time An acoustic wave sensor apparatus is disclosed, which generally includes a piezoelectric substrate having a surface thereon. One or more interdigital transducers and a passivation layer can be formed upon the piezoelectric substrate. Additionally, an absorbent mater... | 11/14/2006 |
| 7123735 | Method and apparatus to increase acoustic separation A method and apparatus for reducing the acoustic coupling between a sound receiving transducer and a sound transmitting transducer is disclosed. A housing, wherein the receiving transducer and the transmitting transducer are mounted, is provided to increase the acou... | 10/17/2006 |
| 7121380 | Soundproofing laminated window for vehicles A method of acoustically attenuating noises of structure-borne origin in an article of manufacture by installing a laminated window having a glass sheet and an intermediate film, where the film has a loss factor tan δ greater than 0.6 and a shear modulus G′ small... | 10/17/2006 |
| 7113447 | Laser pumped compact acoustic sensor system An acoustic transducer system for acoustic signals in water has at least one hollow spherically-shaped shell for vibrating in response to acoustic signals impinging from the water. The hollow spherically-shaped shell has one or more portions that are reflective of i... | 09/26/2006 |
| 7104128 | Multiaxial micromachined differential accelerometer The invention relates to a differential accelerometer micromachined in a plane plate, comprising a base and a differential measurement cell which includes a moveable seismic mass and two force sensors that are connected to the mass and to the base. Under the effect ... | 09/12/2006 |
| 7084552 | Anisotropic acoustic impedance matching material A piezoelectric transducer comprises a piezoelectric layer and an adjacent layer of an acoustic impedance matching material having a plane face comprising a homogenous matrix material with embedded fibers, clusters of fibers, or rods of another material oriented per... | 08/01/2006 |
| 7075215 | Matching layer assembly for a downhole acoustic sensor An acoustic sensor for use in a downhole measurement tool is provided. The acoustic sensor includes a piezoelectric transducer and a matching layer assembly having at least one matching layer and a barrier layer. In various exemplary embodiments, the at least one ma... | 07/11/2006 |
| 7064472 | Electroactive polymer devices for moving fluid The invention describes devices for performing thermodynamic work on a fluid, such as pumps, compressors and fans. The thermodynamic work may be used to provide a driving force for moving the fluid. Work performed on the fluid may be transmitted to other devices, su... | 06/20/2006 |
| 7061163 | Ultrasonic transducer and ultrasonic flowmeter An ultrasonic transducer according to the present invention includes: a piezoelectric body 4 to set up ultrasonic vibrations; an acoustic matching layer 3 made of a material with a density of 50 kg/m3 to 1,000 kg/m3 and an acousti... | 06/13/2006 |
| 7059195 | Disposable and trimmable wireless pressure sensor for medical applications Disposable pressure sensor methods and systems are disclosed. A substrate can be provided, along with a capacitor and an inductor fixed to the substrate to form a pressure sensor thereof. In a variable L configuration, the inductor can be configured to comprise an i... | 06/13/2006 |
| 7058555 | Predictor for optimal selective power transfer A predictor for optimal transducer power gain computes the maximum transducer power gain attainable by a lossless matching network for a given load operating over selected non-overlapping (disjoint) sub-bands within a frequency band of operation. ... | 06/06/2006 |
| 7017416 | Disposable pressure diaphragm and wireless sensor systems and methods A disposable and wireless sensor system and method are disclosed. In general, a pressure diaphragm can be connected to one or more reusable Surface Acoustic Wave (SAW) probe heads, which are associated with an antenna for wirelessly receiving or transmitting signals... | 03/28/2006 |
| 6969943 | Acoustic matching layer and ultrasonic transducer An acoustic matching layer according to the present invention includes a powder of a dry gel. The dry gel preferably has a density of 500 kg/m3 or less and an average pore diameter of 100 nm or less. By using the dry gel powder, a variation in the propert... | 11/29/2005 |
| 6958565 | Passive wireless piezoelectric smart tire sensor with reduced size A surface wave device can be configured to include an interdigital transducer and an acoustic coating formed upon a piezoelectric substrate, wherein the interdigital transducer is selected to introduce negligible electrical coupling to surface waves thereof. Additio... | 10/25/2005 |
| 6954406 | Acoustical source and transducer having, and method for, optimally matched acoustical impedance The invention, in its several embodiments, includes a method of making a plurality of impedance-matched layers interposed between an acoustical source and a target media providing optimal transmission of energy from the acoustical source to the target media. ... | 10/11/2005 |
| 6936009 | Matching layer having gradient in impedance for ultrasound transducers A matching layer for ultrasound transducers has a gradient in impedance value from one surface to the other surface of the matching layer. The matching layer is composed of a plurality of sublayers made of composite materials and securely attached together and is di... | 08/30/2005 |
| 6831876 | Acoustic window An improved acoustic window for an acoustic waveform passage having a generally uniform transmission loss at an angle of incidence of between −40° and +40°. The composition is formed from at least one core layer and at least two septa, with the core layer being ... | 12/14/2004 |
| 6788620 | Acoustic matching member, ultrasound transducer, ultrasonic flowmeter and method for manufacturing the same An acoustic matching member that is incorporated into an ultrasonic transducer for transmitting and receiving ultrasonic waves, includes: at least two layers including a first layer and a second layer that have different acoustic impedance values from each other. Th... | 09/07/2004 |
| 6776051 | Ultrasonic transducer and ultrasonic flowmeter using same It is an object of the present invention to provide an ultrasonic transducer, which is so configured as to reduce the variations in characteristics, thereby to enable the stabilization of the precision, as well as to enable the improvement of the durability, and the... | 08/17/2004 |
| 6690620 | Sonar transducer with tuning plate and tuning fluid A method for maximizing the radiated power of a transducer, such as a sonar transducer, includes providing a transducer system comprising a transducer operating at a frequency f and having a radiating face, a tuning fluid having a density .rho.1 | 02/10/2004 |
| 6622092 | Predictor for optimal broadband impedance matching A predictor for optimal broadband impedance matching of the present invention computes the maximum value of transducer power gain possible for any impedance matching network for a given transmission line, load, and frequency band.... | 09/16/2003 |
| 6545947 | Acoustic matching material, method of manufacture thereof, and ultrasonic transmitter using acoustic matching material An acoustic matching member 1 is used, when a sound is propagated from a first object to a second object, for matching an acoustic impedance of the first object and an acoustic impedance of the second object. The acoustic matching member 1 includes a plur... | 04/08/2003 |
| 6487324 | Stepped acoustic impedance-matching transformer for very narrow channel acoustic traveling wave lens waveguide An acoustic impedance-matching transformer includes a tapered acoustic energy transmission (metal) block, having an acoustic impedance less than that of a piezo-electric transducer in a metric direction toward that of the acoustic propagation medium of th... | 11/26/2002 |
| 6418084 | Ultrasonic probe and method of manufacturing the same An ultrasonic probe includes a piezoelectric element for transmitting and receiving ultrasonic waves and an acoustic lens provided on an ultrasonic transmission/reception side of the piezoelectric element. The acoustic lens is formed in an acoustic lens s... | 07/09/2002 |
| 6400648 | Ultrasonic waveguide An ultrasonic waveguide for guiding an ultrasonic signal situated in a predetermined frequency range is illustrated and described. The ultrasonic waveguide according to the invention is characterized in that it has a coiled foil whose layer thickness is c... | 06/04/2002 |
| 6320989 | Stepped acoustic impedance-matching transformer for very narrow channel acoustic traveling wave lens waveguide An acoustic impedance-matching transformer includes a tapered acoustic energy transmission (metal) block, having an acoustic impedance less than that of a piezo-electric transducer in a metric direction toward that of the acoustic propagation medium of th... | 11/20/2001 |
| 5761156 | Piezoelectric ultrasonic transducer The invention relates to a piezoelectric transducer particularly for use in transit time measurements. The object of the invention is to provide a piezoelectric transducer which ensures an in-phase two-dimensional pulse emission which, independent of the ... | 06/02/1998 |
