Pressure Differential Type Patents (Class 73/182)
  • Patent number: 11002754
    Abstract: A probe head of a pitot probe includes a mandrel having a helical groove, a heater within the helical groove of the mandrel such that an exterior surface of the heater is flush with an exterior surface of the mandrel, and an outer shell having an interior surface in air-tight contact with the mandrel and the heater.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: May 11, 2021
    Assignee: Rosemount Aerospace Inc.
    Inventors: Eric Marty, Kenneth L. Freiborg, Marc Wollak
  • Patent number: 10823751
    Abstract: An aircraft probe includes a base, a strut that extends from the base, at least one port, and an electronics assembly insertable into the strut and removable from the strut. The electronics assembly includes at least one pressure sensor that is pneumatically connected to the at least one port to sense a first pressure when in the inserted position.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: November 3, 2020
    Assignee: Rosemount Aerospace Inc.
    Inventors: Brian Brent Naslund, Matthew Paul Anderson, Benjamin John Langemo, Andrew Sherman
  • Patent number: 10612987
    Abstract: One embodiment is an apparatus including an inner reference tube associated with a load-bearing rotating shaft and having a first set of teeth associated therewith and disposed around a periphery thereof; an outer reference tube associated with an input gear and disposed about the inner reference, the outer reference tube and having a second set of teeth associated therewith and disposed around a periphery thereof wherein teeth comprising the second set of teeth are interleaved with teeth comprising the first set of teeth to comprise an interleaved set of teeth and wherein the inner reference tube and the outer reference tube rotate about a same longitudinal axis and at a same speed as the rotating shaft; and a sensor system comprising a first variable resistance sensor (“VRS”) configured to detect a presence of successive teeth of the interleaved set of teeth and generate an output signal indicative thereof.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: April 7, 2020
    Assignee: TEXTRON INNOVATIONS INC.
    Inventors: Brady Garrett Atkins, Alexander Taits
  • Patent number: 10585007
    Abstract: A total air temperature sensor includes a nose having an airfoil cross section with a leading edge and trailing edge, a sensor housing spaced from and downstream of the nose defining a stagnation chamber with at least one inlet, and a temperature sensor positioned within the sensor housing.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: March 10, 2020
    Assignee: Unison Industries, LLC
    Inventor: Kyle Shaughnessy
  • Patent number: 10274339
    Abstract: A system for determining aircraft performance for at least one flight phase includes a first terminal (11) comprising connections to a first, second and third repository respectively comprising at least a first set of data files (22) a second set of executable scripts (23) and a third set of configuration files (17). At least the third set of configuration files is arranged to be accessed via a second user interface of a second terminal (18). The system further comprises a calling module (12) arranged for selecting, based on the input parameters received and the configuration file selected, at least one executable script file (23) for processing the associated data files (22) so as to determine by a calculation engine (26) the performance of the aircraft for the least one flight phase.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: April 30, 2019
    Assignee: AVIOVISION
    Inventors: Kris Van Den Bergh, Wim Cyriel Maria De Munck, Tom Hugo Jan Luc De Winne, Koen Verhavert
  • Patent number: 10048103
    Abstract: The present invention includes an adjustable Pitot tube and method for using the same for operating or flight testing an aircraft comprising: a Pitot probe; a streamline tube connected to the Pitot probe; a mount on the aircraft connected to the streamline tube, wherein the streamline tube can at least one of rotate about an axis of the mount, or the streamline tube can move the Pitot probe closer to, or away from, a skin of the aircraft.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: August 14, 2018
    Assignee: BELL HELICOPTER TEXTRON INC.
    Inventors: Troy Thomas Bushmire, David Bryan Roberts, Brad John Roberts
  • Patent number: 9704369
    Abstract: A system, a method and an apparatus for autonomous monitoring, detecting and tracking of at least one of movement and orientation of a body or portion of a body. The apparatus comprises a device configured to monitor the translational movement and/or rotational movement of the body; and an altimeter including at least one pair of opposed high sensitivity sensors configured to measure changes in height of the body. An alert condition is determined based on the translational and/or rotational movement of the body and changes in height of the body or portion of the body. The alert condition may comprise a hard fall event, a soft fall event, a susceptibility to a fall, or a near fall event.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: July 11, 2017
    Assignee: Barron Associates, Inc.
    Inventors: Neal T. Richardson, B. Eugene Parker, Jr., William T. Gressick
  • Patent number: 9664542
    Abstract: Systems and methods for additive manufacturing for air data probes are provided. In at least one embodiment a probe comprises a support structure comprising one or more ports for receiving one or more fluids, the support structure comprising an endoskeleton mandrel having an opening for receiving a fluid; and a heating cable encircling an external surface of the endoskeleton mandrel. The probe also comprises an additive coating fused to the external surface of the endoskeleton mandrel and an external surface of the heating cable; and an internal assembly inside the support structure for carrying pressures from the one or more ports to one or more instruments that respond to the one or more fluids to provide a measurement.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: May 30, 2017
    Assignee: Honeywell International Inc.
    Inventors: Grant A. Gordon, Yates Wong, Richard Bonvouloir, Patrick Flynn, Morris Anderson, Allen Brown
  • Patent number: 9297714
    Abstract: An air data probe includes a probe head and a raised portion. The probe head defines a longitudinal axis and includes a forward tip and a probe head surface. The raised portion is defined in the probe head surface aft of the forward tip. The raised portion is raised radially relative to the probe head surface. The raised portion is configured and adapted to trip a fluid boundary layer passing over the probe head to transition from laminar to turbulent for reducing boundary layer separation for consistent readings at high altitudes and/or high mach numbers. A method of manufacturing an air data probe includes forming a probe head and applying a raised portion to a surface of the probe head aft of the forward tip. Applying the raised portion to the surface of the probe head includes using brazing, additive manufacturing, adhesives and/or any other suitable technique.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: March 29, 2016
    Assignee: Rosemount Aerospace Inc.
    Inventors: Charles Jae Doolittle, Roger Duane Foster, Brian Daniel Matheis
  • Patent number: 9279684
    Abstract: A method of repairing an air data probe sense port includes inserting a plug into a sense port in an air data probe, mounting the plug to the air data probe, dressing the welded plug to be substantially flush with adjacent air data probe surface, and forming a new sense port in the air data probe. The method can include enlarging the sense port prior to inserting the plug therein.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: March 8, 2016
    Assignee: Rosemount Aerospace Inc.
    Inventors: Eric Marty, David J. Koch
  • Patent number: 9174743
    Abstract: A protective cover for a pilot probe of an aircraft comprising a first tubular member formed of a rigid material, and a second tubular member formed of a rigid material, and a second tubular member formed of a flexible material including a first ply disposed on an inner side of the first tubular member, having an opening at a first end thereof for receiving the leading end of a pilot probe therein and a closed second end, and a second ply disposed on an outer side of the first tubular member, having a first end thereof secured about the first end of the inner ply and a second end secured to the second end of the first ply.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: November 3, 2015
    Assignee: SERIAS DESIGN LLC
    Inventor: James Van Dis
  • Patent number: 8878313
    Abstract: A pressure sensor has a sensor body at least partly formed with an electrically insulating material, particularly a ceramic material, defining a cavity facing on which is a diaphragm provided with an electric detector element, configured for detecting a bending of the diaphragm. The sensor body supports a circuit arrangement, including, a plurality of circuit components, among which is an integrated circuit, for treating a signal generated by the detection element. The circuit arrangement includes tracks made of electrically conductive material directly deposited on a surface of the sensor body made of electrically insulating material. The integrated circuit is made up of a die made of semiconductor material directly bonded onto the surface of the sensor body and the die is connected to respective tracks by means of wire bonding, i.e. by means of thin connecting wires made of electrically conductive material.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: November 4, 2014
    Assignee: Metallux SA
    Inventor: Luca Salmaso
  • Publication number: 20140053644
    Abstract: An air data probe includes a probe head. The probe head defines a longitudinal axis with a forward tip and aft base and includes a wall tap port inlet defined in the probe head aft between the forward tip and the aft base. The wall tap port inlet opens on an angle relative to the longitudinal axis, wherein the wall tap port inlet has an elongated inlet perimeter configured to resist the formation of a meniscus, or otherwise reduce moisture induced pressure errors.
    Type: Application
    Filed: August 22, 2012
    Publication date: February 27, 2014
    Applicant: Rosemount Aerospace Inc.
    Inventors: Matthew P. Anderson, Scott Braun, Jason R. Danner
  • Patent number: 7549331
    Abstract: A nose section for a heated air pressure probe includes a barrier having a wall which blocks the direct longitudinal intake of air from an inlet, and diverts the air through one or more bypass ports. A heater is located in the barrier. Both the wall and the heater are located near the front of the inlet.
    Type: Grant
    Filed: January 2, 2008
    Date of Patent: June 23, 2009
    Inventor: Bradley J. Powell
  • Patent number: 7490510
    Abstract: An air data sensor that determines a body's angle of attack, static air pressure, total air pressure, mach number, static air temperature and true air speed in one device using pressure and temperature readings. The air data sensor includes a probe that protrudes into an airflow to collect data, a base plate for attaching the probe to a body, and an electronics housing including electronics for interpreting the data collected from the probe.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: February 17, 2009
    Assignee: Ametek, Inc.
    Inventors: Mark Agami, Chiz Chikwendu, William Michael Glasheen, John Wolbach
  • Patent number: 7407136
    Abstract: A surface-mounted fuselage skin appliqué panel having an aperture to a reference static air input port is rugged, replaceable, and independently calibratable. The static port skin appliqué generally conforms to the fuselage surface, and is held in place either with adhesive or with a mounting frame. The appliqué size enables airflow in the vicinity of the static port to be substantially uniform. Because the appliqué is not part of the fuselage structure, distorting stress loads are avoided. The appliqué material resists scratches and bumps that can distort flow. A static port skin appliqué and its mounting provisions can be made using a range of materials, and can receive finishes to meet user preferences.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: August 5, 2008
    Assignee: Aerocontrolex Group, Inc.
    Inventor: Larry J. Murg
  • Publication number: 20080034860
    Abstract: A method and a device for obtaining the three components (u,v,w) of the air speed (TA) of an aircraft along its flight path, the device including an arm (2) provided with two pressure probes disposed at each of its ends, each probe having two pressure intakes.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 14, 2008
    Applicant: EUROCOPTER
    Inventor: Francois Toulmay
  • Patent number: 7213454
    Abstract: A method of calculating a system level air data parameter for an aircraft, for example aircraft angle-of-attack (AOA) and/or angle-of-sideslip (AOS), includes measuring a plurality of local static pressures pi. Next, a plurality of non-dimensional pressure ratios are each generated as a function of one of the plurality of local static pressures pi, a predicted system static pressure Pspredicted, and a predicted impact pressure qc predicted. Then, the system level air data parameter is calculated as a function of the generated plurality of non-dimensional pressure ratios. Air data systems having air data computers configured to implement the method are also disclosed. The air data systems can be Flush Air Data Systems (FADS), or other types of air data systems.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: May 8, 2007
    Assignee: Rosemount Aerospace Inc.
    Inventors: Travis Jon Schauer, Derrick David Hongerholt, Dennis James Cronin
  • Patent number: 6941805
    Abstract: A multi-function air data sensing probe has a strut that is mounted on an aircraft and extends laterally from the aircraft skin. The strut is supported on a base plate, and has a pitot pressure sensing tube at the outer end thereof, with a pitot port facing upstream, and also includes a passageway for total air temperature sensor including a forwardly facing inlet scoop that leads to a chamber in the strut that is laterally offset from the inlet scoop so that flow changes direction as it enters the chamber. The surface defining the change of direction between the scoop and the chamber is provided with bleed holes for bleeding off boundary layer air. A vane type air data sensor is mounted on a shaft that rotates freely and is supported on the strut, and is positioned to sense the relative air flow past the strut to determine changes of relative angles of such air flow. In addition, the strut has static pressure sensing ports on lateral sides thereof leading to a separate chamber on the interior of the strut.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: September 13, 2005
    Assignee: Rosemount Aerospace Inc.
    Inventors: Greg A. Seidel, Dennis J. Cronin, John H. Mette, Mark R. Koosmann, James A. Schmitz, John R. Fedele, Dana A. Kromer
  • Patent number: 6917297
    Abstract: A system and method for advanced warning of severe weather for general aviation aircraft is presented. An aircraft includes an onboard weather tracker which monitors atmospheric condition changes. The weather tracker uses data from an onboard barometric altimeter and a GPS device to calculate air pressure changes in order to identify when the aircraft is flying into a low-pressure zone. The weather tracker uses the air pressure's rate of change and the aircraft's speed to determine the criticality of a situation and appropriately notifies a pilot. The weather tracker provides the pilot with local airport information and alternative flight pattern information per the pilot's request.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: July 12, 2005
    Assignee: International Business Machines Corporation
    Inventors: James Neal Andrews, David Bruce Kumhyr
  • Patent number: 6901793
    Abstract: A cover for a pitot-static probe includes a braided head resistance sleeve insertable over the probe that has an open end provided with an annular fold carrying a retaining ring for establishing a compressive fit with a non-tapered portion of the probe and accommodating relative movements of the sleeve in response to ground conditions without dislodging.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: June 7, 2005
    Inventor: Ernest T. Jefferson
  • Publication number: 20040261518
    Abstract: A multi-function air data sensing probe has a strut that is mounted on an aircraft and extends laterally from the aircraft skin. The strut is supported on a base plate, and has a pitot pressure sensing tube at the outer end thereof, with a pitot port facing upstream, and also includes a passageway for total air temperature sensor including a forwardly facing inlet scoop that leads to a chamber in the strut that is laterally offset from the inlet scoop so that flow changes direction as it enters the chamber. The surface defining the change of direction between the scoop and the chamber is provided with bleed holes for bleeding off boundary layer air. A vane type air data sensor is mounted on a shaft that rotates freely and is supported on the strut, and is positioned to sense the relative air flow past the strut to determine changes of relative angles of such air flow. In addition, the strut has static pressure sensing ports on lateral sides thereof leading to a separate chamber on the interior of the strut.
    Type: Application
    Filed: June 26, 2003
    Publication date: December 30, 2004
    Inventors: Greg A. Seidel, Dennis J. Cronin, John H. Mette, Mark R. Koosmann, James A. Schmitz, John R. Fedele, Dana A. Kromer
  • Patent number: 6813963
    Abstract: A transducer for measuring the relative velocity of movement of a body in a liquid or gaseous medium employs no reciprocating parts and functions by sensing the force applied to a diaphragm (6) die to its movement through the medium or the movement of the medium towards the diaphragm. The speed transducer makes use of a Hall effect solid state device (7) that produces an output when a magnetic field is applied to either of its surfaces. The level of the output voltage is proportional to the velocity of movement in the positive direction, i.e. when the force acts on diaphragm (6) in (FIG. 1). Since the transducer takes into account differential forces, an unwanted common force acting on both diaphragms simultaneously will have no effect on the measured speed. The tubular body (1) in which the Hall effect device is located may be made from any non-magnetic material suitable for the environment in which the transducer will be used.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: November 9, 2004
    Inventor: Wilfred Ignatius Bishop
  • Patent number: 6725714
    Abstract: A boat mounted speedometer for providing a speed signal to a boat operator. The system includes a probe that reaches a laminar flow of water below the back edge of the boat. An opening in the probe allows for water pressure, proportional to boat speed to build up in the system. Any air trapped in the water in the system is bled out through a bleed valve. A pressure transducer reads out a signal and a processor generates a digital signal proportional to pressure and speed of the boat. The signal is read out for the operator on a back lit digital speedometer display.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: April 27, 2004
    Inventors: James E. Newman, William E. Yelton
  • Patent number: 6721673
    Abstract: A system and method for estimating parameters of multiple tones in an input signal. The method includes receiving samples of the input signal, generating a frequency transform (FT) of the samples, identifying multiple amplitude peaks in the FT corresponding to the tones, and determining parameter estimates characterizing each of the multiple tones based on the peaks. For each tone, the effects of the other tones are removed from the FT of the peak of the tone using the parameter estimates of the other tones to generate modified FT data for the tone. Single tone estimation is applied to the modified FT data to generating refined parameter estimates of the tone, which is used to update the parameter estimates of the tone. After refining the estimates for each tone, the entire process may be repeated one or more times using successive refined estimates to generate final estimates for the parameters.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: April 13, 2004
    Assignee: National Instruments Corporation
    Inventor: Yong Rao
  • Patent number: 6604029
    Abstract: An air data sensing probe such as a multi-function probe includes a barrel having multiple pressure sensing ports for sensing multiple pressures. Instrumentation coupled to the pressure sensing ports provides electrical signals indicative of the pressures. An inertial navigation system input of the probe receives electrical signals indicative of inertial navigation data for the aircraft. A neural network of the probe receives as inputs the electrical signals indicative of the multiple pressures and the electrical signals indicative of the inertial navigation data. The neural network is trained or configured to provide as an output, electrical signals indicative of an air data parameter.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: August 5, 2003
    Assignee: Rosemount Aerospace Inc.
    Inventors: Dennis J. Cronin, Roger D. Foster
  • Patent number: 6543463
    Abstract: A pneumatic pressure line cleaning assembly for clearing the pneumatic lines of a pressure gauge, specifically a speedometer for a power boat, is attached to a cut tube of the pneumatic line between the pressure gauge and the air intake opening with a second port of a three-port valve being connected in flow communication with the pressure gauge and a third port opening of the three-port valve being in flow communication with the pressure intake opening. The first port of the three-port valve is in flow communication with an air compressor. In normal operating conditions, ports two and three of the three-port valve are in flow communication so that the pressure gauge pneumatic line is in flow communication with the pressure intake opening and in a second position, the three-port valve is positioned so that the third-port is in flow communication with the first port. In the second position, the air compressor is actuated to provide pressurized bursts of air in a direction towards the air intake opening.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: April 8, 2003
    Inventor: Behrooz Jalayer
  • Patent number: 6443390
    Abstract: Device for pressure tapping, integrated into the fuselage of an aircraft, comprising an integrated plate (10), without discontinuity, with a pressure tapping part in the center (16). The plate (10) enters a supplementary opening (22) formed in a fuselage panel (20). The plate (10) and the panel part (20) surrounding the opening (22) are fixed on a supporting element (18) linked to the framework of the aircraft (34, 36). In the case where rivet, screw or bolt type fixations are used, they are placed at the edge of the plate (10). This arrangement facilitates assembly and improves the precision of the measurement, by suppressing any discontinuity in the measurement zone.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: September 3, 2002
    Assignee: Eads Airbus SA
    Inventors: Jean-Marc Bourgon, Serge Bayonne, Bruno Chauveau
  • Patent number: 6419186
    Abstract: A standoff arm and probe assembly for a helicopter has a standoff mounting arm that extends outwardly from the helicopter body in a selected direction, preferably forwardly. The standoff arm has an outer end that mounts a low lateral speed sensing probe that is positioned with an axis substantially parallel to the axis of a helicopter rotor, and within the downwash region of air movement causes by the rotor. The low lateral speed sensing probe has ports that are arranged annularly around the probe, and the pressures sensed at selected annular or peripheral locations on the probe are measured to determine low air speeds. Additionally, the standoff arm can mount a plurality of other sensors such as a pitot pressure probe extending forwardly from the arm, a lateral pressure sensing probe along a lateral side of the arm, and the arm can mount outside air temperature sensors, ice detectors, and total air temperature sensors, if desired.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: July 16, 2002
    Assignee: Rosemount Aerospace Inc.
    Inventors: Thomas J. Bachinski, Timothy T. Golly, Robert G. Syring, Jr., Ronald J. Petri, Douglas G. Conley
  • Patent number: 6412343
    Abstract: A flame and heat resistant cover for a pitot-static probe has an open end for easy placement over said probe and a gathered end for covering the ram port of the probe. The cover consists essentially of a braided tube of fiber threads and having an open end formed by folding over an end of said tube to form a pocket for receiving a coiled spring carrying an internal annular reinforcing ring having a diameter outwardly engaging the spring to establish initial tensioning and establishing a normal minimal opening therefor, and inwardly engaging the spring to limit the maximum opening therefor. The open end is treated with an impact resisting elastomeric saturant that impregnates said fibers for increasing the abrasion resistance of said fibers during insertion of said cover over said probe. The cover may be formed of flame resistant fibers including heat treated glass fibers and para-aramid fibers.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: July 2, 2002
    Inventor: Ernest Thaddeus Jefferson
  • Patent number: 6308581
    Abstract: The fluid flow meter of the present invention includes a ramp inclined to the surface of a vessel so as to form a recess in the surface. A dynamic port surface extends from the lower end of the ramp to the surface of the vessel. A dynamic port is formed in the surface of the vessel, and a static port is formed in the ramp. The differential pressure between the dynamic and static ports is measured and is related to the flow velocity of fluid over the surface. The inventive flow meter has advantages of reduced drag, reduced likelihood of fouling and reduced likelihood of impact damage compared to conventional flow meters.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: October 30, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Michael A. Deeds
  • Patent number: 6176130
    Abstract: A flight velocity vector measuring system in a wide velocity region in which an attack angle pressure coefficient C&agr; of air current, a sideslip angle pressure coefficient C&bgr; and an air current angle pressure coefficient C&ggr; are obtained from five pressure information detected by a square truncated pyramid-shape probe. The aforementioned pressure coefficients, pressure calibration coefficients with respect to a Mach number M, an attack angle &agr; and a sideslip angle &bgr; every velocity region obtained by dividing the wide velocity region into a plurality of regions stored in advance in the calculation processor, and a Mach number M, an attack angle &agr; and a sideslip angle &bgr; of unknown quantity constitute a calculation processing expression comprising a polynomial approximation to call the pressure calibration coefficients in the velocity region, and flight velocity vectors (M, &agr;, &bgr;) are calculated by the polynomial approximation.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: January 23, 2001
    Assignee: National Aerospace Laboratory of Science & Technology Agency
    Inventors: Teruomi Nakaya, Naoaki Kuwano, Seigou Nakamura, Asao Hanzawa
  • Patent number: 6161418
    Abstract: A method and apparatus for evaluating the end cap round transducer horn assemblies used in debubbling operations wherein the ECR THA can be evaluated off-line at both high and low power and on-line by making electrical measurements on the ECR THA. The electrical measurements are used to characterize the physical condition of the piezoelectric ceramics of the THA. A test box is employed to practice the method. The test box is connected between the THA and a signal analyzer. Power is supplied to the THA and the electrical signals across the THA are sampled. The sampled electrical signals are transmitted to the signal analyzer while maintaining the amplitude and phase relationship thereof. The sampled electrical signals are used to generate an impedance trace for the particular THA. That impedance trace is compared to a model impedance trace. In such manner, it can be determined whether the ECR THA is operational.
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: December 19, 2000
    Assignee: Eastman Kodak Company
    Inventors: Robert Peter Kraus, Jr., Fugui He, Roland J. Koestner, Steven D. Possanza, Paul P. Zontek
  • Patent number: 6138937
    Abstract: A method for operating a cheese-producing textile machine (1), having a plurality of aligned work stations (2), a transport device (21) extending over the length of the machine for removing finished cheeses (11), and a cheese changer (23) displaceable above the work stations with an ultrasound sensor device (30) connected to the control device (38) of the cheese changer (23) for monitoring the loading state of the transport device (21). The sensor device (30, 38) is initially set to the climatic conditions of the respective place of employment by processing appropriate reference sound signals, i.e. a correction factor is determined. During operation, scanning values (TW) are then determined by means of the traveling time of the measuring sound signals of the ultrasound sensor (30) which, taking into consideration the respectively prevailing climatic conditions, permit conclusions regarding the loading state of the transport device (21) in the deposit areas of the respective work station (2).
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: October 31, 2000
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Paul Straaten, Ulrich Fechter, Jurgen Enger, Peter Schwartz
  • Patent number: 6122968
    Abstract: An ultrasonic probe includes an ultrasonic transducer; a delay line acoustically coupled to said transducer so that ultrasonic vibrations may be transmitted into said delay line from said ultrasonic transducer in a first direction, said delay line includes a first section and a second section; the first and second sections forming an interface that is substantially perpendicular to said first direction; and the second section including a surface for coupling with a material to be investigated. The probe can be used to measure a thickness of a coating on a substrate by transmitting a signal in a first direction from the transducer into the delay line; measuring a time t.sub.1 for a first portion of the signal to travel round trip from the transducer and the interface; using the measured time t.sub.1 to calculate an expected time t.sub.2 for a second portion of the signal to travel round trip from the transducer to an opposite face of the delay line; measuring a time t.sub.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: September 26, 2000
    Assignee: Defelsko Corporation
    Inventor: Leon C. Vandervalk
  • Patent number: 6116091
    Abstract: The recreation of vibration levels at certain points in a stationary vehicle interior that are representative of realistic road conditions are achieved using road measurements in conjunction with a technique known as "reciprocal filtering." The reciprocal filtering technique consists of using an inverse transfer function, or impulse response in the time domain, between an excitation transducer and an accelerometer to calculate the excitation signal needed to recreate the vibrations measured on the road when squeak and rattle are present in a component of the vehicle. A set of excitation signals may be recorded for each component in the vehicle which is suspected of producing squeak and rattle noise. When a complaint is made that a vehicle is producing squeak and rattle, a service technician may reproduce noise by inducing vibrations through a kit having a CD player, an amplifier, a bass shaker and a CD with the set of excitation signals stored on separate tracks thereof.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: September 12, 2000
    Assignee: Ford Global Technologies, Inc.
    Inventors: Vy Tran, Bill Covitz, Gary Boes, Keng D. Hsueh, Andrew Phillips, Christopher Robert Fuller, Francois Charette
  • Patent number: 6112572
    Abstract: A method and apparatus for evaluating the end cap round transducer horn assemblies used in debubbling operations wherein the ECR THA can be evaluated off-line at both high and low power and on-line by making electrical measurements on the ECR THA. The electrical measurements are used to characterize the physical condition of the piezoelectric ceramics of the THA. A test box is employed to practice the method. The test box is connected between the THA and a signal analyzer. Power is supplied to the THA and the electrical signals across the THA are sampled. The sampled electrical signals are transmitted to the signal analyzer while maintaining the amplitude and phase relationship thereof. The sampled electrical signals are used to generate an impedance trace for the particular THA. That impedance trace is compared to a model impedance trace. In such manner, it can be determined whether the ECR THA is operational.
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: September 5, 2000
    Assignee: Eastman Kodak Company
    Inventors: Robert Peter Kraus, Jr., Fugui He, Roland J. Koestner, Steven D. Possanza, Paul P. Zontek
  • Patent number: 6109092
    Abstract: A method and apparatus for evaluating the end cap round transducer horn assemblies used in debubbling operations wherein the ECR THA can be evaluated off-line at both high and low power and on-line by making electrical measurements on the ECR THA. The electrical measurements are used to characterize the physical condition of the piezoelectric ceramics of the THA. A test box is employed to practice the method. The test box is connected between the THA and a signal analyzer. Power is supplied to the THA and the electrical signals across the THA are sampled. The sampled electrical signals are transmitted to the signal analyzer while maintaining the amplitude and phase relationship thereof. The sampled electrical signals are used to generate an impedance trace for the particular THA. That impedance trace is compared to a model impedance trace. In such manner, it can be determined whether the ECR THA is operational.
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: August 29, 2000
    Assignee: Eastman Kodak Company
    Inventors: Robert Peter Kraus, Jr., Fugui He, Roland J. Koestner, Steven D. Possanza, Paul P. Zontek
  • Patent number: 6087951
    Abstract: A magnetic accelerometer detects the sharp lateral rocking movements of an unbalanced spinning tub of a washing machine. The accelerometer has a fixed and a movable magnet that are disposed at a rest position in spaced, magnetic attraction to each other. The movable magnet breaks away from the stationary magnet in response to vibration forces of a predetermined magnitude and frequency. When the magnet breaks away, it presses against an actuator button of a miniature switch and therefore signals an alarm condition. When the vibration forces are reduced below the trigger level, the movable magnet is pulled back to its rest position by magnetic attraction with the stationary magnet. The magnetic attraction of the stationary and movable magnets can be adjusted and the break away point can be set by applying an external magnetic field to the magnets.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: July 11, 2000
    Assignee: The Cherry Corporation
    Inventors: Edward A. Ramsden, Arthur Douglas Guydan
  • Patent number: 6073477
    Abstract: A digital bond tester operating at frequencies in the kHz range and relying upon vibrational modes which can excite all or substantial portions of the test object.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: June 13, 2000
    Assignee: The Boeing Company
    Inventors: Wayne E. Woodmansee, Michael J. Duncan, Mark A. Lee
  • Patent number: 6062083
    Abstract: A method and an apparatus for detecting and measuring cracks in plate-like structures using acoustic emission technique are disclosed. A false aperture transducer is designed to provide a criterion for filtering out extraneous noise in the acoustic emission signal based on modal analysis by computing the ratio of the high-frequency peak amplitude to low-frequency peak amplitude of the signal. A calibration curve correlating crack depth to the amplitude ratio can be obtained by simulating crack growth in a fracture specimen coupled to a test structure or field structure, and measuring acoustic emission signal in the structure by the false aperture transducer. The calibration curve correlates simulated crack depth percentage with computed peak amplitude ratio of the measured signal.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: May 16, 2000
    Inventor: Harold L. Dunegan
  • Patent number: 6053028
    Abstract: A method and apparatus for evaluating the end cap round transducer horn assemblies used in debubbling operations wherein the ECR THA can be evaluated off-line at both high and low power and on-line by making electrical measurements on the ECR THA. The electrical measurements are used to characterize the physical condition of the piezoelectric ceramics of the THA. A test box is employed to practice the method. The test box is connected between the THA and a signal analyzer. Power is supplied to the THA and the electrical signals across the THA are sampled. The sampled electrical signals are transmitted to the signal analyzer while maintaining the amplitude and phase relationship thereof. The sampled electrical signals are used to generate an impedance trace for the particular THA. That impedance trace is compared to a model impedance trace. In such manner, it can be determined whether the ECR THA is operational.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: April 25, 2000
    Assignee: Eastman Kodak Company
    Inventors: Robert Peter Kraus, Jr., Fugui He, Roland J. Koestner, Steven D. Possanza, Paul P. Zontek
  • Patent number: 6038932
    Abstract: An aircraft pitot and static pressure sensing device and an aircraft having the sensing device, more particularly a fighter aircraft, include a plurality of pressure sensors disposed in a radome of the aircraft. In addition, a plurality of air intake ports is provided in the radome. The air intake ports are connected through connecting passages to the pressure sensors.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: March 21, 2000
    Assignees: Nord-Micro Elektronik Feinmechanik AG, Daimler Chrysler AG
    Inventors: Hermann Wandel, Michael Jost, Helmut Sommer, Robert Fischer-Wilk
  • Patent number: 6035696
    Abstract: An ultrasonic scan assembly is adapted to efficiently and accurately scan a surface and cross-section of a wall of an underground gas pipe with ultrasonic energy transmitted and received by an ultrasonic transducer provided therein. The input pulse applied to the ultrasonic transducer is calibrated so that its width matches the natural mechanical resonant frequency of the ultrasonic transducer. As a result, the energy efficiency of the transducer is maximized and the accuracy of the scan is improved.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: March 14, 2000
    Assignee: Gas Research Institute
    Inventors: Karl F. Kiefer, Donald L. Chaffee
  • Patent number: 5979241
    Abstract: An ultrasonic probe includes an ultrasonic transducer; a delay line acoustically coupled to the transducer so that ultrasonic vibrations may be transmitted into the delay line from the ultrasonic transducer in a first direction, the delay line includes a first section and a second section; the first and second sections forming an interface that is substantially perpendicular to the first direction; and the second section including a surface for coupling with a material to be investigated. The probe can be used to measure a thickness of a coating on a substrate by transmitting a signal in a first direction from the transducer into the delay line; measuring a time t.sub.1 for a first portion of the signal to travel round trip from the transducer and the interface; using the measured time t.sub.1 to calculate an expected time t.sub.2 for a second portion of the signal to travel round trip from the transducer to an opposite face of the delay line; measuring a time t.sub.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: November 9, 1999
    Assignee: DeFelsko Corporation
    Inventor: Leon C. Vandervalk
  • Patent number: 5974886
    Abstract: An exemplary apparatus for determining the thicknesses of individual layers in a multilayer article comprises an ultrasonic transducer coupled to the multilayer article with a buffer rod of similar acoustic properties, a pulser-receiver-amplifier which generates ultrasonic waves to produce discernible, time resolved pulse echoes, a digitizing oscilloscope which may be used to view the received pulse echoes, and a computer for controlling data acquisition and analysis.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: November 2, 1999
    Assignee: General Electric Company
    Inventors: James Jorgly Carroll, John Broddus Deaton, Jr., Ram Kumar Upadhyay, Robert Snee Gilmore, Robert Stanley Thayer
  • Patent number: 5952554
    Abstract: A method of testing frequency characteristics of a laser displacement/vibration meter by the use of a novel method which can cope with a broader frequency range and finer micro-level displacements to enhance the reliability of the displacement/vibration meter. Upon applying impact on one end face of a round metal rod, an elastic wave pulse which propagates through the metal rod generates a stepwise dynamic displacement of the other end face of the rod when reflected there. This dynamic displacement is measured simultaneously by a reference laser interferometer with a reference laser beam and a laser displacement/vibration meter with unknown frequency response characteristics, followed by comparison of measurement data over a frequency range to determine the frequency response characteristics of the unknown laser displacement/vibration meter.
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: September 14, 1999
    Assignee: Director-General of the Agency of Industrial Science and Technology
    Inventor: Akira Umeda
  • Patent number: 5942677
    Abstract: Signals generated by a knock sensor are coupled to an electronic network for amplifying and processing the output signals of the knock sensor. The electronic network includes a device for charging a storage capacitor to a potential which is a function of the amplitude of the knock sensor output signal. The storage capacitor is coupled to the input of an amplifier via a normally closed first switch. A detector for sensing any disconnection of the knock sensor from the electronic system produces a control signal indicative of a disconnect condition. The control signal is used to open the normally closed first switch and to cause the input of the amplifier to be clamped to a reference potential which lies outside the signal range normally produced across the storage capacitor whereby the output of the output of the amplifier is placed at a predetermined level indicative of a disconnect condition.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: August 24, 1999
    Assignee: Harris Corporation
    Inventors: Salomon Vulih, Stephen J. Glica, Harold Allen Wittlinger
  • Patent number: 5943641
    Abstract: The device for extracting a useful acoustic signal from a composite acoustic signal including nuisance components includes: first sensor component for picking up the composite acoustic signal; second sensor component for picking up, in real-time, the reference acoustic signal, which is substantially correlated with the nuisance components of the composite acoustic signal; adaptive filtering component; and extraction component. The coefficients of the filtering component are adapted in real time according to an algorithm chosen so as to minimize the energy of the composite acoustic signal as a function of the energy of the reference acoustic signal, until the signal leaving the output of the extraction component corresponds substantially to the useful acoustic signal selectively rid of the nuisance components.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: August 24, 1999
    Assignee: Technofirst
    Inventors: Christian E. Carme, Alain R. Roure
  • Patent number: 5929315
    Abstract: A method and an apparatus for detecting and measuring cracks in plate-like structures using acoustic emission technique are disclosed. A false aperture transducer is designed to provide a criterion for filtering out extraneous noise in the acoustic emission signal based on modal analysis by computing the ratio of the high-frequency peak amplitude to low-frequency peak amplitude of the signal. A calibration curve correlating crack depth to the amplitude ratio can be obtained by simulating crack growth in a fracture specimen coupled to a test structure or field structure, and measuring acoustic emission signal in the structure by the false aperture transducer. The calibration curve correlates simulated crack depth percentage with computed peak amplitude ratio of the measured signal.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: July 27, 1999
    Inventor: Harold L. Dunegan