Class 702/171 - By ultrasonic

Subclass of Class 702 - Data processing: measuring, calibrating, or testing
Definition: Subject matter wherein the thickness or width is determined
No. of patents: 39
Last issue date: 03/31/2009

Number	Title	Issue Date
7512518	Method for measuring thin layers in solid state devices A method of using acoustic signals in the form of waves or pulses to non-destructively measure the thickness of a bonding layer sandwiched between and bonding together overlying and underlying materials different from the bonding layer especially when the thickness ...	03/31/2009
7386416	Method and apparatus for measuring wall thickness, ovality of tubular materials The wall thickness and ovality of a tubular are simultaneously determined. The theoretical radius of a pipe is computed from a measurement of its circumference. An ultrasonic device conventionally used to measure the wall thickness of tubulars is adapted to also mea...	06/10/2008
7272529	Dual wall turbine blade ultrasonic wall thickness measurement technique A method and apparatus is provided to analyze a dual wall structure having at least one hollow core therein and having the same unknown material sound velocities in walls and in post as well. A transducer is located in at least two different positions with respect t...	09/18/2007
7231314	Method and apparatus for measuring wall thickness, ovality of tubular materials The wall thickness and ovality of a tubular are simultaneously determined. The theoretical radius of a pipe is computed from a measurement of its circumference. An ultrasonic device conventionally used to measure the wall thickness of tubulars is adapted to also mea...	06/12/2007
7109735	Method for measuring gate dielectric properties for three dimensional transistors A method for measuring three-dimensional gate dielectric structures can involve forming test patterns that cover a range of dimensional values for the fins on which the gate dielectric structures are formed. Then, by measuring the gate dielectric properties and then...	09/19/2006
7103484	Non-contact methods for measuring electrical thickness and determining nitrogen content of insulating films Non-contact methods for determining a parameter of an insulating film are provided. One method includes measuring at least two surface voltages of the insulating film. The surface voltages are measured after different charge depositions. Measuring the surface voltag...	09/05/2006
6968290	Electrochemical machining tool assembly and method of monitoring electrochemical machining An electrochemical machining tool assembly includes first and second tools that are spaced apart from one another so that a workpiece can be located therebetween. The assembly also includes a first ultrasonic transducer mounted in the first tool and a second ultraso...	11/22/2005
6934646	Waveform complexity detector Trial decimations are performed on an acquired waveform. Each trial produces a sequence of packets applied to a complexity detection circuit. Each packet contains a decimation value to be used in place of acquisition values to be suppressed along a decimation sample...	08/23/2005
6915232	Film thickness measuring method, relative dielectric constant measuring method, film thickness measuring apparatus, and relative dielectric constant measuring apparatus A non-contact method of measuring the thickness of an insulator film on a semiconductor substrate includes: (i) charging the insulator film surface in a non-contact manner; (ii) obtaining a first flat band voltage by conducting, prior to the charging processing step...	07/05/2005
6898536	Method for improving the start up of an ultrasonic system under zero load conditions The start up performance of an ultrasonic system under zero load conditions is improved by setting a phase set point in a frequency control loop such that, at start up under zero load conditions, the phase set point intersects a point on a phase-frequency response c...	05/24/2005
6721692	Systems and methods for determining spectra using dynamic least squares algorithms with measurements from LED color sensor An LED-based spectrophotometer uses a reconstruction algorithm, based on spectral information of an illumination source and a reference spectrophotometer, to convert integrated multiple illuminant measurements from a non-fully illuminant populated color sensor into ...	04/13/2004
6625568	Sound-based vessel cleaner inspection Sound detection techniques and sound discrimination techniques are used to analyze the real time sounds generated during the operation of cleaning heads operating within a vessel to determine if the cleaning heads are operating properly. During a typical ...	09/23/2003
6561032	Non-destructive measurement of pipe wall thickness The average wall thickness of a pipe carrying a fluid is determined by sensing disturbances in the pipe at two spaced locations, determining the propagation velocity of coupled propagation mode signals at low frequencies resulting from the disturbances, a...	05/13/2003
6502059	Method of determining waveform stability for pulse echo layer thickness transducer A method is provided of determining waveform stability of a pulse echo layer transducer (PELT) used for measuring paint film thickness of painted bodies. The method includes the steps of reading a signal with the PELT transducer with respect to a desired ...	12/31/2002
6003377	Method for measuring the thickness of plate constructions and pipe A method for automatic state control, inspection, cleaning and/or surface treatment of structures, especially measuring the thickness of plate constructions and pipes by means of ultrasound signals from a self-propelled, remotely controllable unit. The se...	12/21/1999
5878380	Method and apparatus for ultrasound block measurement A method has been invented of providing feedback regarding tolerance for a dimension of a concrete block in relation to a datum in a computer-based system with a CPU, an input connected to the CPU, a memory associated with the CPU, a data transmitter conn...	03/02/1999
5815404	Method and apparatus for obtaining and using antifuse testing information to increase programmable device yield A method and apparatus for creating and utilizing a database of defective antifuses on a programmable logic device and comparing the list to a catalog of required connections in a design, wherein the process of comparing the two lists will determine wheth...	09/29/1998
5808912	Method for dimensional weighing utilizing point determination The invention is a method for measuring the dimensions of a parcel through point determination which is initiated by placing a parcel on a weighing scale within a field of measurement which comprises a first known spatial relationship. In a preferred embo...	09/15/1998
5700955	Precision thickness variation mapping via one-transducer ultrasonic high resolution profilometry for sample with irregular or rough surface An apparatus and method for determination of sample thickness and surface depression utilizing ultrasonic pulses. The sample is held in a predetermined position by a support member having a reference surface. Ultrasonic pulses travel through a medium of k...	12/23/1997
5663502	Method and apparatus for measuring thickness of layer using acoustic waves Ultrasonic waves from a transmit device are transmitted to an object subject to measurement. A surface reflected wave propagated in a contact medium and reflected at the surface of a tube and bottom surface reflected waves passing through an oxidation lay...	09/02/1997
5661241	Ultrasonic technique for measuring the thickness of cladding on the inside surface of vessels from the outside diameter surface An ultrasonic inspection method for measuring the thickness of non-welded (non-metallurgically bonded) cladding on the inside surface of a vessel from an outside diameter surface of the vessel relies upon the occurrence of a phase change at an interface b...	08/26/1997
5606504	Crop swath-width measurement using acoustic transducers A combine or harvesting machine has a header on its front end which is moved into a crop swath when harvesting the crop. The swath width of the crop in front of the header is measured with two acoustic range sensors that are mounted on opposite ends of th...	02/25/1997
5596508	High resolution measurement of a thickness using ultrasound Apparatus (10) for measuring physical properties of a tube (T). A pulse generator (12) generates an electrical pulse having predetermined characteristics. Transducers (20a, 20b) convert the pulse to an ultrasonic waveform (W) and propagate the waveform at...	01/21/1997
5446673	System and method for finish machining an in-process part having an inaccessible interior cavity A system for finish machining an in-process part having an inaccessible interior cavity, an envelope of excess material to be machined, and a predefined minimum wall thickness includes a fixture for holding the in-process part to be finish machined. Also ...	08/29/1995
5349860	Apparatus for measuring the thickness of clad material An apparatus for measuring the thickness of a clad material having an outer mother metal and an inner clad metal. The apparatus includes a transmitter crystal and a receiver crystal of a double crystal angle-type probe which contact the outer surface of t...	09/27/1994
5270942	Processing ultrasonic measurements of a rotating hollow workpiece A computer (21) processes the time between ultrasonic echoes received at a transducer (19) indicative of the outer radius and wall thickness of a workpiece (10) by subtracting (69) the weighted average (80-90) wall thickness from the weighted average oute...	12/14/1993
5163013	Device for measurement of ultrasonic transit times A device for measuring ultrasound transit times in workpieces disposed over an HF pulse generator which generates high-frequency wave trains with few oscillations periods and which is connected with an ultrasound transmitter/ultrasound receiver, whose out...	11/10/1992
5113358	Web caliper measuring system A non-contact caliper-type gauge particularly suited for measuring the thickness of a running web. In its preferred form, the system includes a pair of opposed scanning heads defining a gap through which the running web passes, the heads being adapted to ...	05/12/1992
5062298	Non-contact wet or dry film thickness measuring device using eddy current and ultrasonic sensors A device for measuring the thickness of a wet or dry paint film applied on a substrate without contacting the film is disclosed. The device uses an ultrasonic sensor positioned adjacent to an inductive eddy-current proximity sensor where the ultrasonic se...	11/05/1991
5009103	Ultrasonic thickness measuring method and apparatus An ultrasonic thickness measuring method and apparatus in which an ultrasonic pulse is transmitted from a probe to a material to be measured and resulting multiple reflection pulses from the material to be measured are detected to obtain a time interval b...	04/23/1991
4821665	Submersible ROV for cleaning and inspecting metal A submersible ROV removes extraneous material from the surface of submerged metal with a cleaning tool and measures the thickness of the metal with an ultrasonic probe. A camera allows visual operation of the ROV. The cleaning tool and ultrasonic probe ca...	04/18/1989
4799177	Ultrasonic instrumentation for examination of variable-thickness objects Ultrasonic apparatus and methods for detecting defects in a part include a plurality of transducer channels, at least one of which is dedicated to determining the thickness of the part. An initial thickness value is determined and stored, and then subsequ...	01/17/1989
4750117	Ultrasonic depth measurement apparatus and methods Apparatus for determining or measuring the depth of precipitation accumulating on the surface of a pathway, such as an airport runway or the like. The apparatus includes a sensor having electrical transducer means for emitting and sensing ultrasonic energ...	06/07/1988
4715008	Hand-held digital thickness gage A microprocessor-controlled, hand-held, digital ultrasonic thickness gage having automatic zero calibration, scroll velocity adjustment and an electronic locking feature to prevent inadvertent calibration or velocity data variations. This invention is use...	12/22/1987
4679160	Ultrasonic depth measurement apparatus and methods Apparatus for determining the depth of precipitation accumulating on the surface of a pathway, such as an airport runway or the like, includes a sensor having electrical transducer means for emitting and sensing ultrasonic energy and having a body of mate...	07/07/1987
4658648	Method of and apparatus for the ultrasonic measurement of the thickness of test articles A method of measuring the thickness of test articles by pulse reflection ultrasonics, the length of time period as determined by the signal triggering the ultrasonic transmission and by an ultrasonic signal reflected at the end of the measurement path len...	04/21/1987
4413517	Apparatus and method for determining thickness Apparatus and method for measuring the thickness of a test piece by obtaining the acoustic velocity of the test piece where an ultrasonic wave is refracted into the test piece at a first point and the wave travels substantially parallel to the surface and...	11/08/1983
4398420	System for measuring the wall thickness of an object The wall thickness of an object is measured on the basis of three consecutive rear wall reflections caused by an ultrasonic wave impinging on the front wall of the object. The time intervals between, on the one hand, the first and second rear wall reflect...	08/16/1983
4353257	Nondestructive system for testing the thickness of boiler tubes in boilers The present invention relates to a system for the nondestructive testing of the thickness of boiler tubes. The system comprises a probe assembly which includes a mounting unit for mounting the assembly in a mud or water drum of a boiler at the location of...	10/12/1982

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Class 702/171 - By ultrasonic