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| Number | Title | Issue Date |
| 6637268 | Vibration displacement sensing system A vibration displacement sensing system comprises a piezoelectric substrate, first- and second comb-shaped electrodes, a counter electrode, and a signal analyzer. When input electric signals are applied between the first comb-shaped electrode and the coun... | 10/28/2003 |
| 6634214 | Method and apparatus for measuring the relative density of a gas A method and apparatus for measuring the relative density of a gas. The apparatus includes a chamber to which a gas in question, for example natural gas, is supplied through an inlet and leaves through an outlet. The speed of sound SoS at ambient temperat... | 10/21/2003 |
| 6634233 | Method for determining the wall thickness and the speed of sound in a tube from reflected and transmitted ultrasound pulses A method for the determining ultrasonic sound propagation speed and wall thickness of a tubular object. Time-domain and frequency-domain analyses are used, where the latter can determine acoustic dispersion if the specimen is made up of a dispersive mater... | 10/21/2003 |
| 6629464 | Laser shock peening quality assurance by acoustic analysis A method for quality control monitoring of laser shock peening a surface of a production workpiece during which laser beam pulses form a plurality of corresponding plasmas. An acoustic signal of each laser beam pulse during a period of time during a durat... | 10/07/2003 |
| 6629463 | Acoustic inspection of one-piece bladed wheels These objects are achieved by a method of acoustically inspecting a one-piece bladed wheel in which the wheel is driven in rotation; each blade of the wheel is subjected to mechanical excitation; its acoustic response is picked up and a corresponding elec... | 10/07/2003 |
| 6625515 | Roll defect management process The Roll Defect Management Process (RDMP) is a system which is designed to manage, track and evaluate all mill rolls found in use in the hot and cold production of flat rolled metal strip. The RDMP is capable of detection, distinction and differentiation ... | 09/23/2003 |
| 6622560 | Ultrasound imaging method and apparatus based on pulse compression technique using a spread spectrum signal An ultrasound imaging method forms an image of an object using signals reflected from the object after transmitting an ultrasound pulse to the object. In the method, at a first step, a predetermined first spread spectrum signal is converted to the ultraso... | 09/23/2003 |
| 6621278 | High-precision measuring method and apparatus A method and apparatus of measuring a predetermined parameter having a known relation to the transit time of movement of an energy wave through a medium, by transmitting from a first location in the medium a cyclically-repeating energy wave; receiving the... | 09/16/2003 |
| 6615661 | Ultrasound sorting of weanling calves and identification of tenderness indicators A method and system for determining meat quality in cattle is provided. In preferred embodiments the method comprises obtaining an ultrasound measurement of a cattle specimen between the 12th rib and 13th rib at weaning age. The ultr... | 09/09/2003 |
| 6612172 | Sol-gel tube crack detection apparatus and method A crack detection method and system capable of detecting cracks on a scale of about 5 μm or greater, useful for detecting cracks in sol-gel tubes. An electromagnetic radiation signal is transmitted from a sensor to a body in which cracking may occur. The... | 09/02/2003 |
| 6606910 | Method and apparatus for evaluating damage of metal material A damage evaluation method and apparatus of a metal material which is capable of determining whether a flaw in the metal sample is originated by the creep damage or in the manufacturing process, and also capable of estimating a remaining life of the metal... | 08/19/2003 |
| 6606909 | Method and apparatus to conduct ultrasonic flaw detection for multi-layered structure An invention to measure of objects of non-homogeneous ultrasonic impedance in the testing path is provided to detect the present of flaws in any part of the object. The invention utilized a reference signal to compare against the actual signal derived fro... | 08/19/2003 |
| 6598477 | Method of evaluating logs to predict warp propensity of lumber sawn from the logs A method of predicting warp of lumber that might be sawn from any given log is disclosed. The method involves measurement of stress wave velocity in the tree stem. A scan is then made to define the exterior geometric configuration of the log. In particula... | 07/29/2003 |
| 6595060 | Method for determining structural inhomogeneities in sheet material A method for determining structural inhomogeneities in sheet material including exposing sheet material to ultrasonic waves, measuring ultrasonic waves transmitted through the sheet material and ultrasonic waves reflected from the sheet material at a plur... | 07/22/2003 |
| 6595035 | Sealant stream anomaly detecting assembly A sealant stream anomaly detecting assembly for detecting anomalies such as gas bubbles in a high-pressure sealant stream. The assembly includes an ultrasonic transducer supported on a manifold defining a sensing chamber of a fluid channel. The transducer... | 07/22/2003 |
| 6591682 | Device and process for signal analysis A device for detecting or analyzing machinery damage is used preferably in the determination of defects in roller bearings. Pulse-like machinery or bearing noise acquired by a sensor is converted into special time signals. These time signals correspond to... | 07/15/2003 |
| 6584847 | Ultrasonic detector and method for ultrasonic detection While a transmitting transducer (2a) for transmitting an ultrasonic wave and a receiving transducer (2b) for receiving an ultrasonic wave are moved within a predetermined circular region (7) on a surface of a material being measured, ultrasonic waves are ... | 07/01/2003 |
| 6581466 | Acoustic inspection of structures A method for inspecting concrete structures includes the steps of exciting the structure to be inspected with a mechanical device such as a chain, sensing resulting vibrations with an acoustical sensor such as a microphone that is not physically coupled t... | 06/24/2003 |
| 6575036 | Method for in-situ nondestructive measurement of Young's modulus of plate structures A method for determining stiffness of a composite laminate plate entails disposing a device for generating an acoustical pulse against a surface of the plate and disposing a detecting device against the same surface spaced a known distance from the pulse-... | 06/10/2003 |
| 6575035 | Apparatus and method for measuring internal stress of reticle membrane An apparatus for measuring internal stress of a membrane formed in a reticle, including a temperature adjustment device configured to change a temperature of the membrane from a first temperature to a second temperature; a resonance frequency finding devi... | 06/10/2003 |
| 6564640 | Smart skin structures A smart skin structure has vibration energy managing and steering capabilities. The skin can be used to managing vibrations in the skin or shell of a system, subcomponent, device, or structure. The skin has sensors coupled to the skin to obtain a response... | 05/20/2003 |
| 6564156 | Method for determining joint stiffness degradation A method of determining joint stiffness degradation in structure 10 is provided including a first exciting of the structure 18, a first measuring of transfer function and frequency response function 20, simulating a mileage accumulation process of the str... | 05/13/2003 |
| 6553837 | Process and apparatus device for analysis of roller bearings in machines The invention relates to a process for analysis of roller bearings (15) which have been installed in machines, by means of a sensor (10) a signal being recorded which is produced by the rolling motion, and the signal amplitude is evaluated in order to det... | 04/29/2003 |
| 6536284 | Method and apparatus for compressor control and operation via detection of stall precursors using frequency demodulation of acoustic signatures An apparatus for monitoring the health of a compressor comprising at least one sensor operatively coupled to the compressor for monitoring at least one compressor parameter, a calibration system coupled to the at least one sensor, the calibration system p... | 03/25/2003 |
| 6532821 | Apparatus and method for evaluating the physical properties of a sample using ultrasonics A method is disclosed for evaluating the physical properties of a sample, for example, the grain size in a polycrystalline material. An ultrasound field is generated in a local region of the sample with a non-contact source, such as a pulsed laser, such t... | 03/18/2003 |
| 6527723 | Variable multi-dimensional apodization control for ultrasonic transducers Variable multi-dimensional apodization control for an ultrasonic transducer array is disclosed. The variable multi-dimensional apodization control is applicable to both piezoelectric based transducers and to MUT based transducers and allows control of the... | 03/04/2003 |
| 6526830 | Method and device for monitoring a bearing arrangement A method and a device for monitoring a bearing arrangement, having at least one bearing, in a mounting element of a roller journal bearing of a roller in a stand of a rolling mill train are designed to initiate upkeep or repair work on the bearing arrange... | 03/04/2003 |
| 6523411 | Wheel inspection system A wheel inspection system based on electromagnetic acoustic signals and having improved inspection by the use of a noise removing system and/or a pivotal mounting system. The invention also includes an improved detection head and data analysis.... | 02/25/2003 |
| 6516667 | Ultrasonic harmonic signal acquisition An ultrasonic diagnostic imaging system receives echo signals from a transducer for digital processing and image formation. An analog to digital converter converts the analog echo signals to digital signal samples. The dynamic range of the analog to digit... | 02/11/2003 |
| 6513385 | Acoustic sensor for pipeline deposition characterization and monitoring A method and apparatus for analyzing a deposited layer on the inner surface of a fluid container wall having inner and outer surfaces are disclosed. One embodiment of the method comprises (a) transmitting an acoustic signal from a transmitter at a first d... | 02/04/2003 |
| 6508128 | Method and device for monitoring a bearing arrangement A method and device for monitoring a bearing arrangement, having at least one bearing, in a housing of a roller journal bearing of a roller in a continuous casting installation are designed to initiate upkeep or repair work on the bearing arrangement at t... | 01/21/2003 |
| 6501356 | Method for determining the remaining service life of the switch contacts in an electric switching device and electric switching device with an evaluation unit for carrying out said method A method for determining a remaining service life of switching contacts in an electric switching device. The method includes operating the switching contacts so as to produce structure-borne sound signals, capturing the structure-borne sound signals, perf... | 12/31/2002 |
| 6499350 | Turbine engine foreign object damage detection system A Foreign Object Damage (FOD) detection system is disclosed for detecting and analyzing ultrasound or stress waves emitted when an object enters the intake of a turbine engine and impacts one or more of the blades in the engine. Upon detection the FOD det... | 12/31/2002 |
| 6497150 | Ultrasonic austenitic weld seam inspection method and apparatus An array of dual-element transducers for automated, ultrasonic inspection of a weld seam in austenitic material is configured through the use of a schematic representation of the weld seam. The weld is divided into zones, and separate transducers are sele... | 12/24/2002 |
| 6494097 | Method and apparatus for measuring thickness of a layer in a multi-layered object A method and device for determining a thickness of a layer in an object. For each of a plurality of frequencies, a continuous vibrational wave is generated at a surface of the layer and an energy of a steady state echo wave produced in the object in respo... | 12/17/2002 |
| 6487909 | Acoustic waveguide sensing the condition of components within gas turbines A system for online monitoring the condition of a thermal barrier coating on the vanes and/or blades of a combustion turbine, or other forms of component deterioration affecting the acoustic properties of the vanes and/or blades. The system begins with a ... | 12/03/2002 |
| 6490469 | Method and apparatus for dynamic focusing of ultrasound energy Method and system disclosed herein include noninvasively detecting, separating and destroying multiple masses (tumors, cysts, etc.) through a plurality of iterations from tissue (e.g., breast tissue). The method and system may open new frontiers with the ... | 12/03/2002 |
| 6484581 | Ultrasonic transceiver and vehicle's surrounding obstruction sensor A ultrasonic transceiver includes a case for housing a ultrasonic sensor having a transducer provided therein, and a resilient member to be interposed between the case and an ultrasonic sensor. The surface of the case opposing the side surface of the ultr... | 11/26/2002 |
| 6485423 | Correction of phasefront aberrations and pulse reverberations in medical ultrasound imaging A method of correcting for phasefront aberrations in ultrasound imaging uses highly spaced apart point scatterers artificially placed in the tissue being imaged. The point scatterers reflect the transmitted sound and are individually differentiated to pro... | 11/26/2002 |
| 6481289 | Method and system for processing measurement signals to obtain a value for physical parameter In a measurement system wherein time-varying physical signals containing frequency information related to a physical parameter of an object are measured to obtain corresponding time-varying measurement signals, a method and system are disclosed for proces... | 11/19/2002 |
