By Vibration Patents (Class 73/24.01)
  • Patent number: 7174767
    Abstract: An apparatus and method for the analysis of particles in an aerosol includes providing an inlet for the aerosol, a sample collector which accumulates particles passing through the inlet, a sample conditioning system which can vary at least one condition relating to the collected sample, a controller which causes the sample conditioning system to operate at select conditions, a measuring device for determining at least one parameter relating to the accumulated particles. The controller monitors the parameter while the condition is varied.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: February 13, 2007
    Assignee: Sensors, Inc.
    Inventor: David R. Booker
  • Patent number: 7171862
    Abstract: The disclosed apparatus and methods allow collection of concentrated samples of content in shipping packages without unsealing the package by forcing airflow via existing hidden gaps or, if necessary, creating one by a small incision. The air is injected into the hidden gaps by either probe or socket device to disturb and agitate contents inside the package, causing the contents to loosen and blending particulates on the surface into the air stream. Airborne particles are channeled into a detection device, where the particulates are concentrated. Display and warning apparatus receive and record the analysis results from the detection device. If the analysis finds that predetermined selection and sensitivity criteria for target hazard or contraband material are met, then the warning apparatus initiates the appropriate alert protocols.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: February 6, 2007
    Inventor: Sung Hoon Yoon
  • Patent number: 7146857
    Abstract: The invention is concerned with a method and apparatus for real time analysis of gas mixtures, e g determination of air quality, including at least one resonator (1, 11), means for gas transportation to and from the resonator (1, 11), e g by diffusion or transit flow via openings (5) means for activation (2) and detection (3) of an acoustic signal within the resonator (1, 11), at least one means (7) for measurement of the temperature within the resonator (1, 11), and at least one means (4) for the determination of both the resonance frequency and the quality factor of the resonator (1,11) in real time. These entities are related to the average molecular mass and viscosity or thermal conductivity, respectively, of the gas mixture. The resonator (1, 11 may include a compliant element, e g a constricted volume (6) and an inertial element, e g ist opening (5) or may support standing acoustic waves, in which the sound wavelength is related to a physical dimension of the resonator (1, 11).
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: December 12, 2006
    Assignee: Hok Instrument AB
    Inventor: Bertil John Waldemarsson Hök
  • Patent number: 7143632
    Abstract: An electronic signal relating to a sonic wave when an intended gas does not exist in air is synchronized and locked in a feedback circuit constituting a phase-locked loop (PLL). Then, an electronic signal relating to another sonic wave when the intended gas exist in the air is input into the feedback circuit to release the synchronization (lock) of the feedback circuit to measure as a given electronic signal the difference in phase of the sonic wave in the air between with and without the intended gas to be detected. The intended gas can be detected as the electronic signal due to the difference in phase of the sonic wave.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: December 5, 2006
    Assignee: High Energy Accelerator Research Organization
    Inventor: Yoshinari Kondo
  • Patent number: 7127934
    Abstract: A system for determining polarization of a gas comprises a container that contains the polarized gas. An oscillator circuit comprises an NMR coil that is positioned adjacent to the container. A pulse generator circuit is configured to generate an electrical pulse that may be transmitted to the optical cell through the NMR coil to excite the polarized gas responsive to a control processor. A Q-reduction circuit that is independent of the pulse generator circuit is configured to reduce oscillations in the oscillator circuit from the transmitted electrical pulse responsive to the control processor. A receive circuit is responsive to an electrical signal that is induced in the oscillator circuit due to the electromagnetic excitation of the polarized gas. The control processor is configured to determine the polarization of the gas based on the output signal of the receive circuit.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: October 31, 2006
    Assignee: Medi-Physics, Inc.
    Inventors: Zivko Djukic, Steve Kadlecek, John Nouls, Ian Nelson, Bastiaan Driehuys
  • Patent number: 7127936
    Abstract: An acoustic gas analyzer for gas mixture has an acoustic velocity meter that provides a first output dependent on a detected transmission of acoustic energy through a gas to be analyzed, a temperature probe having a probe time constant that provides a second output indicative of a measured temperature of the gas, and a calculation unit that receives the first and the second outputs and determines compositional information of the gas therefrom. A signal processor is connected between the acoustic velocity meter and the calculation unit and temporally adapts the amplitude of the first output from the meter in a manner dependent on the probe time constant and provides a temporally adapted first output for use as the first output within the calculation unit.
    Type: Grant
    Filed: March 1, 2004
    Date of Patent: October 31, 2006
    Assignee: Maquet Critical Care AB
    Inventors: Erik Cardelius, Lars Skoglund
  • Patent number: 7111495
    Abstract: In a sensor on the basis of surface wave components disposed in a housing with at least one surface wave component, a fluid channel and conductors for high frequency signals, the conductors are connected to coupling capacitors with capacitive coupling surface areas which are arranged opposite each other on the housing and the surface wave equipment and closely adjacent one another so that high frequency signals can be transmitted to, and from, the surface wave components.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: September 26, 2006
    Assignee: Forschungszentrum Karlsruhe
    Inventors: Michael Rapp, Achim Voigt
  • Patent number: 7091869
    Abstract: The measuring arrangement contains a measuring cell and a reference cell, respectively, and microphones assigned to these cells, to which microphones an electronic evaluation circuit is connected and in which a subtraction of the signals of the microphones takes place, as well as a radiation source for applying a modulated signal to the measuring cell. The modulation frequency of the radiation source coincides with the resonant frequency of the measuring cell, and the measuring cell and the reference cell are open at at least one end to the gas to and/or aerosol to be detected. The measuring arrangement is used as smoke alarm, gas alarm, fire hazard alarm or as combined smoke and gas alarm, wherein each of the measuring cells is exposed to a radiation of a wavelength at which a relevant substance to be detected is absorbent and an opto-acoustic effect is produced as a result.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: August 15, 2006
    Assignee: Siemens Building Technologies AG
    Inventors: Martin Forster, Peter Nebiker
  • Patent number: 7082810
    Abstract: A gas sensor (10) including a measurement chamber (28) into which a gas GS is flown and a detection element main body (40) facing the measurement chamber (28). The detection element main body (40) includes an element case 42, and a protective film (48) is adhered to a bottom surface thereof. An acoustic matching plate (50) and a piezoelectric element (51) of a substantially columnar shape and a tube body (52) provided in a position surrounding the acoustic matching plate 50 and the piezoelectric element 51 are housed in the element case (42). A filler is then introduced into the element case (42), whereby the acoustic matching plate (50), the piezoelectric element (51), and the tube body (52) are sealed by a filled layer (99).
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: August 1, 2006
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masashi Sakamoto, Yoshikuni Sato, Keigo Banno, Katsuya Otake, Takeshi Morita, Hideki Ishikawa, Noboru Ishida
  • Patent number: 7081745
    Abstract: A paramagnetic oxygen sensor and method employs a pressure sensor having a membrane extending through an air gap for a magnetic field. A piezoelectric element is mounted on the membrane. Gas chambers are formed on either side of the membrane. The gas mixture, the properties of which are to be measured, is supplied to one of the chambers. A reference gas is applied to the other chamber. A pulsating magnetic field is provided across the air gap and through the chambers containing the gas mixture and reference gas. The differing responses of the gas mixture and reference gas to the magnetic field deflect the membrane. The deflection of the membrane is sensed by the piezoelectric element. The piezoelectric element maybe operated either in a passive mode or active mode to sense the deflection of the membrane.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: July 25, 2006
    Assignee: GE Healthcare Finland Oy
    Inventor: Heikki Haveri
  • Patent number: 7047792
    Abstract: The present invention provides a delay line SAW device fabricated on a lithium niobate substrate and coated with a bilayer of nanocrystalline or other nanomaterials such as nanoparticles or nanowires of palladiumn and metal free pthalocyanine which will respond to hydrogen gas in near real time, at low (room) temperature, without being affected by CO, O2, CH4 and other gases, in air ambient or controlled ambient, providing sensitivity to low ppm levels.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: May 23, 2006
    Assignee: University of South Florida
    Inventors: Venkat R. Bhethanabotla, Shekhar Bhansali
  • Patent number: 7040139
    Abstract: A chemical sensing system has: an interrogation unit operable to wirelessly transmit an interrogation signal and wirelessly receive a response; an environmentally sealed container for holding a chemical analyte; a sensor array unit in fluid communication with the analyte disposed within the container, where the sensor array unit is operable to generate a response in the presence of a chemical stimulus; and a passive responder unit connected with the sensor array unit, the responder unit being powered from the interrogation signal, where the responder unit is operable to wirelessly receive the interrogation signal and wirelessly transmit the response to the interrogation signal to the interrogation unit.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: May 9, 2006
    Assignee: Smiths Detection Inc.
    Inventor: Steven A. Sunshine
  • Patent number: 7032432
    Abstract: An apparatus 10,70 and method is provided that includes a spatial array of unsteady pressure sensors 15–18 placed at predetermined axial locations x1–xN disposed axially along a pipe 14 for measuring at least one parameter of a saturated vapor/liquid mixture 12, such as steam, flowing in the pipe 14. The pressure sensors 15–18 provide acoustic pressure signals P1(t)–PN(t) to a signal processing unit 30 which determines the speed of sound amix propagating through of the saturated vapor/liquid mixture 12 in the pipe 14 using acoustic spatial array signal processing techniques. The primary parameters to be measured include vapor/liquid concentration (i.e., steam wetness or steam quality), vapor/liquid mixture volumetric flow, mass flow, enthalpy, density and liquid droplet size. Frequency based sound speed is determined utilizing a dispersion model to determine the parameters of interest.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: April 25, 2006
    Assignee: CiDRA Corporation
    Inventors: Daniel L. Gysling, Douglas H. Loose
  • Patent number: 6997039
    Abstract: Disclosed are resonant gas sensors and methods for forming and using the disclosed sensors. The sensors include a resonator including a layer comprising adsorptive nanostructures, for example carbon nanotubes, activated carbon fibers, or adsorptive nanowires. The dielectric of the resonator is in electrical communication with the layer comprising adsorptive nanostructures such that the effective resonant frequency of the resonator depends on both the dielectric constant of the dielectric as well as the dielectric constant of the adsorptive layer. In some embodiments, the nanostructures can be degassed. The sensors can detect the presence of polar gases, non-polar gases, organic vapors, and mixtures of materials with both high sensitivity and high selectivity.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: February 14, 2006
    Assignee: Clemson University
    Inventors: Apparao M. Rao, Saurabh Chopra
  • Patent number: 6978656
    Abstract: A system and method for performing rupture event scanning and other sensing operations on a sample. The method includes providing a transducer with an immobilized binding partner material and a sample material disposed thereon. The sample material is applied to the immobilized binding partner material so that, if components in the sample material have sufficient affinity for the immobilized binding partner material, bonds will form between at least some of such components and the immobilized binding partner material. The method further includes accelerating the transducer to induce bond breakage, where such accelerating is performed by applying a drive signal to the transducer. The drive signal includes a waveform having multiple frequency components that are pre-selected based on expected resonance behavior of the transducer. The method may also include analyzing an output response of the transducer in response to application of the drive signal.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: December 27, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Daniel R. Blakley
  • Patent number: 6962071
    Abstract: The present invention relates to remotely determining local physical parameters in a fluid-filled cavity (e.g. heart cavities, blood vessels, industrial container) by means of ultrasound waves and encapsulated or stabilised gas bubbles. A measuring method, a method of diagnostic ultrasound of the same and an apparatus for remotely determining ambient physical local parameters of a fluid-filled cavity are disclosed.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: November 8, 2005
    Assignee: Bracco Research S.A.
    Inventors: Peter J. A. Frinking, Marcel Arditi
  • Patent number: 6935158
    Abstract: Hydrogen gas sensors employ an epitaxial layer of the thermodynamically stable form of aluminum nitride (AlN) as the “insulator” in an MIS structure having a thin metal gate electrode suitable for catalytic dissociate of hydrogen, such as palladium, on a semiconductor substrate. The AlN is deposited by a low temperature technique known as Plasma Source Molecular Beam Epitaxy (PSMBE). When silicon (Si) is used the semiconducting substrate, the electrical behavior of the device is that of a normal nonlinear MIS capacitor. When a silicon carbide (SiC) is used, the electrical behavior of the device is that of a rectifying diode. Preferred structures are Pd/AlN/Si and Pd/AlN/SiC wherein the SiC is preferably 6H—SiC.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: August 30, 2005
    Assignee: Wayne State University
    Inventors: Flaminia Serina, Gregory W. Auner, Ka Yuen Simon Ng, Ratna Naik
  • Patent number: 6931913
    Abstract: A chemical agent detector utilizing surface acoustic wave (SAW) sensors for detecting the presence of a multitude of chemical agents by sampling ambient air is provided. A pressure-differential manifold having an air intake port, an exhaust port, a valve and a pump is used to draw the ambient air into the manifold to be tested. A plurality of SAW sensors mounted on sensor driver boards which are in turn mounted on the manifold come into contact with the ambient air sample. Each SAW sensor is coated with a substance that has an affinity for detecting a particular chemical agent. Each SAW sensor driver board generates a continuous RF signal which emits a frequency shift if a particular chemical agent is detected. A power cycler module turns each sensor driver board on and off such that only one sensor driver board is powered-on at a given point in time.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: August 23, 2005
    Assignee: Constellation Technology Corporation
    Inventor: Lane L. Manoosingh
  • Patent number: 6892566
    Abstract: A gas concentration sensor includes a measurement chamber for measuring a concentration of a specific gas component in a gas under measurement; an inflow path for allowing inflow of the gas under measurement thereinto and an outflow path for allowing outflow of the gas under measurement therefrom; a reflection wall for reflecting an acoustic wave; and an acoustic wave transmitting-receiving element having a transmitting-receiving surface adapted to transmit an acoustic wave toward the reflection wall and receive an acoustic wave reflected from the reflection wall. The concentration of the specific gas in the gas under measurement is detected on the basis of a propagation time between transmission of the acoustic wave and reception of the reflected acoustic wave. When a predetermined member having the sensor attached thereto is placed in a horizontal plane, the transmitting-receiving surface faces downward. A recess is formed in a peripheral portion of the reflection wall.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: May 17, 2005
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Masashi Sakamoto, Yoshikuni Sato, Hideki Ishikawa, Keigo Banno, Noboru Ishida
  • Patent number: 6892565
    Abstract: A gas sensor includes an element case 42 with an internal peripheral surface formed as a taper surface 100. A portion of a housing section 43 surrounded by the taper surface 100 and a protective film 48 is filled with a filler 49. When the filler 49 thermally expands at high temperature, the filler 49 is subjected to a component of force in an upward direction by the taper surface 100. Therefore, projection of an element portion 44 involving deformation of the protective film 48 is suppressed, a change ?L of a propagation distance L to a reflecting section 33 is also suppressed, and a detection accuracy never decreases. In addition, reverberation is reduced.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: May 17, 2005
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Yoshikuni Sato, Hideki Ishikawa, Morio Onoda, Takeshi Morita, Noboru Ishida
  • Patent number: 6886412
    Abstract: An ultrasonic-wave propagation-time measuring method and gas concentration sensor are disclosed in which a reception wave which has been transmitted and received by an ultrasonic element 5 is subjected to full-wave rectification in order to obtain a full-wave-rectified wave, which is then integrated by an integration circuit 37 to obtain an integral value. A peak value of the integral value is held by a peak-hold circuit 39. As to detection of gas concentration, a threshold-level calculation section 21e sets a reference value on the basis of the peak value, and a point in time when the amplitude of a reception wave having undergone full-wave rectification is judged by a comparator 43 to have reached the reference value is regarded as an arrival time. Subsequently, a gas concentration is determined on the basis of a period between the emission time and the arrival time.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: May 3, 2005
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Keigo Banno, Hideki Ishikawa, Yoshikuni Sato, Noboru Ishida, Takafumi Oshima
  • Patent number: 6856918
    Abstract: The invention is directed to a system and method for detecting defects in a manufactured object. These defects may include flaws, delaminations, voids, fractures, fissures, or cracks, among others. The system utilizes an ultrasound measurement system, a signal analyzer and an expected result. The signal analyzer compares the signal from the measurement system to the expected result. The analysis may detect a defect or measure an attribute of the manufactured object. Further, the analysis may be displayed or represented. In addition, the expected result may be generated from a model such as a wave propagation model. One embodiment of the invention is a laser ultrasound detection system in which a laser is used to generate an ultrasonic signal. The signal analyzer compares the measured ultrasonic signal to an expected result. This expected result is generated from a wave propagation model. The analysis is then displayed on a monitor.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: February 15, 2005
    Assignee: Lockheed Martin Corporation
    Inventors: Marc Dubois, Peter W. Lorraine, Robert J. Filkins, Thomas E. Drake
  • Patent number: 6848295
    Abstract: An acoustic wave sensor to detect an analyte, the sensor comprising a piezoelectric material including a wide bandgap semiconductor material grown using plasma source molecular beam epitaxy.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: February 1, 2005
    Assignee: Wayne State University
    Inventors: Gregory W. Auner, Feng Zhong, Chantelle Hughes, Gina Shreve, Hao Ying
  • Patent number: 6843101
    Abstract: A sensor for the measurement of carbon dioxide concentration within an air flow being input to a measuring cell (1) connected to at least one electroacoustic element (2, 3) for transmitting and receiving airborne acoustic waves within the measuring cell (1). The output signal of the sensor corresponds to the propagation velocity of these waves and an indirect measure of carbon dioxide concentration, with an automatic offset correction functionality for compensation of undesired offset variations of the signal, caused by temperature or humidity variations. Preferably, an accumulating function for minimizing the influence of the offset variations is included, which for humidity variations may consist of a material with high porosity and surface density of polar molecular groups. Temperature control of the inner sheath (4) is effected by a temperature sensor (11), a resistive heating element (12) in good thermal contact with the inner sheath (4), and a control circuit (13).
    Type: Grant
    Filed: October 8, 2001
    Date of Patent: January 18, 2005
    Inventor: Bertil Hök
  • Publication number: 20040244466
    Abstract: The invention provides ammonia gas sensor and its manufacturing method. Said ammonia gas sensor comprises a piezoelectric substrate, a surface acoustic wave sensor, and a L-glutamic acid hydrochloride coating; said surface acoustic wave sensor and said L-glutamic acid hydrochloride coating are on the said piezoelectric substrate.
    Type: Application
    Filed: June 6, 2003
    Publication date: December 9, 2004
    Inventor: Chi-Yen Shen
  • Patent number: 6823715
    Abstract: A gas-concentration measuring apparatus for measuring the concentration variation of gas residing in a target region. The gas-concentration measuring apparatus comprises an ultrasound-transmitter adapted to transmit an ultrasound in response to an ultrasound-generating signal having a rate of voltage change equal to or greater than a slew rate of an operational amplifier, and further adapted to output the ultrasound-generating signal. An ultrasound-receiver adapted to receive the ultrasound wave passed through the gas residing in the target region, and further adapted to convert the received ultrasound into an electrical signal serving as a received ultrasound signal is provided. A gas-concentration determiner adapted to input the ultrasound-generating signal and the received ultrasound wave signal into the operational amplifier to generate an amplified transmitting-side chopping wave and an amplified receiving-side chopping wave is further provided.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: November 30, 2004
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Tatsu Kobayakawa, Hiroshi Yamada, Hideki Toda, Sachiko Saitou
  • Patent number: 6820462
    Abstract: An acoustic gas monitor has a measurement chamber into which a reference gas of known composition is received and is provided with a wall section for the selective transmission of a gaseous substance to be monitored between the reference gas internal the chamber and a host gas externally of the chamber. An acoustic velocity meter is arranged to supply to an analyzer a signal indicative of an acoustic velocity within the mixture of reference gas and gaseous substance in the chamber. The analyzer being programmed to derive, from the velocity measurement made within the single chamber, information relating to the level of the gaseous substance to be monitored.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: November 23, 2004
    Assignee: Maquet Critical Care AB
    Inventor: Erik Cardelius
  • Publication number: 20040200266
    Abstract: An acoustic gas analyzer for gas mixture has an acoustic velocity meter that provides a first output dependent on a detected transmission of acoustic energy through a gas to be analyzed, a temperature probe having a probe time constant that provides a second output indicative of a measured temperature of the gas, and a calculation unit that receives the first and the second outputs and determines compositional information of the gas therefrom. A signal processor is connected between the acoustic velocity meter and the calculation unit and temporally adapts the amplitude of the first output from the meter in a manner dependent on the probe time constant and provides a temporally adapted first output for use as the first output within the calculation unit.
    Type: Application
    Filed: March 1, 2004
    Publication date: October 14, 2004
    Applicant: Maquet Critical Care AB
    Inventors: Erik Cardelius, Lars Skoglund
  • Publication number: 20040194534
    Abstract: An apparatus and method for sensing chemical and/or biological analytes in a gaseous or liquid medium by monitoring the changes in impedance and thickness of a sensing element in the presence of the analyte is provided. Detecting means are provided to measure the change in the physical property of the sensing material to determine the presence and/or the amount of analyte present. An array of hybrid sensors dedicated to detecting a particular analyte which may be included in the medium, is also provided.
    Type: Application
    Filed: June 3, 2003
    Publication date: October 7, 2004
    Inventors: Timothy L. Porter, Michael P. Eastman, Clay Macomber
  • Patent number: 6784381
    Abstract: 22A temperature and/or pressure compensated microbalance is disclosed. Temperature compensation is achieved by applying heat to at least a part of the microbalance, measuring a temperature-dependent variable, and controlling the amount of heat applied to the microbalance to keep the temperature-dependent variable substantially constant. In one embodiment, the heat is applied to the microbalance by passing electrical current through a resistive element provided on or embedded in the oscillating element of the microbalance. Pressure compensation is achieved by taking into account the variation in the mass or density of fluid passing through the microbalance. Various materials and methods of construction are also disclosed, including micro-machining and electroforming.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: August 31, 2004
    Inventor: David Michael Korpi
  • Patent number: 6715339
    Abstract: An apparatus to normalize a flow rate of a fluid in a main flow channel is provided. The apparatus uses a movable member, such as a flexible membrane disposed for reciprocating displacement, to produce a constant dither flow of the fluid that is independent of fluid composition. This dither flow generates a signal output from a normalizing flow sensor that both represents a characteristic property of the fluid and a flow rate calibration factor. A similar apparatus to determine the characteristic property or flow rate calibration factor is also provided. The devices disclosed may be used in numerous industrial, process, and medical flow system applications for normalization of flow sensors and to derive other properties of a fluid.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: April 6, 2004
    Assignee: Honeywell International Inc.
    Inventors: Ulrich Bonne, David Kubisiak
  • Patent number: 6718270
    Abstract: A vibration testing device includes a computer system having: a measurement processing block for inputting an output of the monitoring sensor and processing the output; a model substituting block for modeling characteristics of the test piece, calculating a response quantity corresponding to a drive condition of an actuator, and inputting the calculation result to a numerical simulation block and the parameter changing block; the parameter changing block for comparing the calculation result of the model substituting block with the processing result of the measurement processing block, and changing the parameter; the numerical simulation block for calculating a vibration response in accordance with a previously input structure numerical model; and a waveform generating block for calculating a time function of a deformation to be applied to the test piece, and outputting the time block to the actuator controlling device.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: April 6, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Toshihiko Horiuchi, Takao Konno
  • Publication number: 20040050142
    Abstract: A sensor for the measurement of carbon dioxide concentration within an air flow being input to a measuring cell (1) connected to at least one electroacoustic element (2, 3) for transmitting and receiving airborne acoustic waves within the measuring cell (1). The output signal of the sensor corresponds to the propagation velocity of these waves and an indirect measure of carbon dioxide concentration, with an automatic offset correction functionality for compensation of undesired offset variations of the signal, caused by temperature or humidity variations. Preferably, an accumulating function for minimizing the influence of the offset variations is included, which for humidity variations may consist of a material with high porosity and surface density of polar molecular groups. Temperature control of the inner sheath (4) is effected by a temperature sensor (11), a resistive heating element (12) in good thermal contact with the inner sheath (4), and a control circuit (13).
    Type: Application
    Filed: August 20, 2003
    Publication date: March 18, 2004
    Inventor: Bertil Hok
  • Patent number: 6706977
    Abstract: A controller for a quartz crystal microbalance (QCM) sensor system and method for detecting mass deposition on a QCM sensor. The controller controls a QCM using temperature-, voltage- and current-regulating circuits, a microcontroller, an oscillator, heating and cooling devices and circuits, high voltage grids, digital-to-analog and analog-to-digital converters, data telemetry and uplink circuits, and a remote user. The remote user may be a person, computer, network or data logger. The remote user allows the controller to be reconfigurable during operation. The controller samples and reports data faster and is more reliable over extended periods of operation. Further, the controller is assembled using innovative techniques making it smaller and thus more transportable, easier to incorporate into existing facilities and less expensive to construct and operate. The apparatus may also be assembled in a modular fashion that allows for customization.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: March 16, 2004
    Assignee: The Johns Hopkins University
    Inventors: Russell P. Cain, Bliss G. Carkhuff, O. Manuel Uy
  • Publication number: 20040040379
    Abstract: An acoustic monitoring method and system in laser-induced optical breakdown (LIOB) provides information which characterize material which is broken down, microbubbles in the material, and/or the microenvironment of the microbubbles. In one embodiment of the invention, femtosecond laser pulses are focused just inside the surface of a volume of aqueous solution which may include dendrimer nanocomposite (DNC) particles. A tightly focused, high frequency, single-element ultrasonic transducer is positioned such that its focus coincides axially and laterally with this laser focus. When optical breakdown occurs, a microbubble forms and a shock or pressure wave is emitted (i.e., acoustic emission). In addition to this acoustic signal, the microbubble may be actively probed with pulse-echo measurements from the same transducer. After the microbubble forms, received pulse-echo signals have an extra pulse, describing the microbubble location and providing a measure of axial microbubble size.
    Type: Application
    Filed: August 19, 2003
    Publication date: March 4, 2004
    Applicant: The Regents of the University of Michigan
    Inventors: Matthew O'Donnell, Jing Yong Ye, Theodore B. Norris, James R. Baker, Lajos P. Balogh, Susanne M. Milas, Stanislav Y. Emelianov, Kyle W. Hollman
  • Patent number: 6680994
    Abstract: The contents of a container 1 are non-intrusively monitored by probing the container with an ultrasonic signal, and measuring changes in the ultrasound signature of the received signal after the signal has passed through the contents of the container.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: January 20, 2004
    Assignee: British Nuclear Fuels PLC
    Inventors: Gordon Rees Jones, Keith Woolley, Joseph William Spencer, Gary Jones, Perminder Tony Singh, Robert McAlpine Dickson, John Raymond Gibson
  • Publication number: 20040006409
    Abstract: In the prevent invention a controllable acoustic source (14) in connection with the process fluid (10) emits a signal (18) into the fluid (10), consisting of a suspension of particles (12), being volumes of gas, liquid or solid phase. The controllable acoustic signal (18) is allowed to interact with the particles (12), and the acoustic (pressure) signals (22) resulting from such an interaction is measured preferably via a sensor (24). A spectrum is measured. The spectrum is used to predict properties, content and/or size of the particles (12) and/or used to control a process in which the process fluid (10) participates. The prediction is performed in the view of the control of the acoustic source (14). The used acoustic signal has preferably a frequency below 20 kHz.
    Type: Application
    Filed: June 17, 2003
    Publication date: January 8, 2004
    Inventors: Thomas Liljenberg, Stefan Backa, Lennart Thegel, Mats Abom
  • Publication number: 20040003649
    Abstract: A programmable device for analyzing mixtures of suspended vapors and air by pinging particles making up the vapors at their mechanical resonant frequencies and detecting the resultant rings.
    Type: Application
    Filed: June 26, 2003
    Publication date: January 8, 2004
    Inventor: Robert W. Beckwith
  • Patent number: 6668618
    Abstract: Systems and methods of monitoring thin film deposition are described. In one aspect, a thin film deposition sensor includes an acoustical resonator (e.g., a thin film bulk acoustical resonator) that has an exposed surface and is responsive to thin film material deposits on the exposed surface. A substrate clip may be configured to attach the thin film deposition sensor to a substrate. A transceiver circuit may be configured to enable the thin film deposition sensor to be interrogated wirelessly. A method of monitoring a thin film deposition on a substrate also is described.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: December 30, 2003
    Assignee: Agilent Technologies, Inc.
    Inventors: John D. Larson, III, Herbert L. Ko, Richard K. Karlquist, Mark A. Hueschen, Kent W. Carey
  • Patent number: 6640613
    Abstract: In a method for producing surface wave sensors on the basis of a surface wave building component a polymer parylene film with a thickness of 20 to 200 nm is applied to a hydrophilic sensor surface of the surface wave building component by deposition from the gas phase, whereby the hydrophilic sensor surface becomes hydrophobic, the surface is then subjected to plasma activation to render it hydrophilic and a hydrophilic sorption polymer layer is then applied to the parylene film so as to provide a surface wave sensor with a homogenous sorption polymer layer.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: November 4, 2003
    Assignee: Forschungszentrum Karlsruhe GmbH
    Inventors: Michael Rapp, Ullrich Stahl
  • Publication number: 20030188580
    Abstract: An acoustic gas monitor has a measurement chamber into which a reference gas of known composition is received and is provided with a wall section for the selective transmission of a gaseous substance to be monitored between the reference gas internal the chamber and a host gas externally of the chamber. An acoustic velocity meter is arranged to supply to an analyzer a signal indicative of an acoustic velocity within the mixture of reference gas and gaseous substance in the chamber. The analyzer being programmed to derive, from the velocity measurement made within the single chamber, information relating to the level of the gaseous substance to be monitored.
    Type: Application
    Filed: March 10, 2003
    Publication date: October 9, 2003
    Inventor: Erik Cardelius
  • Patent number: 6626026
    Abstract: An apparatus that is configured to sense the presence of gases, vapors and liquids using acoustic waves. The apparatus comprises a first part that is configured to generate acoustic waves. The apparatus further comprises a second part having a sensing and acoustic wave guiding device, which is configured to sense the presence of such substances and propagate acoustic waves. The first part is removably fixable to the second part of the apparatus. When the first part is fixed to the second part, the acoustic waves propagate in the second part.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: September 30, 2003
    Assignee: Interuniversitair Microelektronica Centrum (IMEC)
    Inventors: Pedro Banda, Andrew Campitelli
  • Publication number: 20030177813
    Abstract: A gas sensor (10) including a measurement chamber (28) into which a gas GS is flown and a detection element main body (40) facing the measurement chamber (28). The detection element main body (40) includes an element case 42, and a protective film (48) is adhered to a bottom surface thereof. An acoustic matching plate (50) and a piezoelectric element (51) of a substantially columnar shape and a tube body (52) provided in a position surrounding the acoustic matching plate 50 and the piezoelectric element 51 are housed in the element case (42). A filler is then introduced into the element case (42), whereby the acoustic matching plate (50), the piezoelectric element (51), and the tube body (52) are sealed by a filled layer (99).
    Type: Application
    Filed: March 6, 2003
    Publication date: September 25, 2003
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masashi Sakamoto, Yoshikuni Sato, Keigo Banno, Katsuya Otake, Takeshi Morita, Hideki Ishikawa, Noboru Ishida
  • Patent number: 6581452
    Abstract: Volume measuring apparatus is used in a closed space as in the case of volume measurement of liquid in a container placed on an orbit of an artificial satellite and permits the volume measurement in a state without mixture with gas, liquid, or solid. A volume measuring apparatus is an apparatus for measuring the volume of liquid or solid under microgravity, which has two or more containers coupled to each other by a pipe, a device for separating or fixing a gas phase, a liquid phase, or a solid phase, a pressure fluctuation source, a pressure signal receiver, a pressure gage, and a thermometer, wherein the separating or fixing device, the pressure fluctuation source, the pressure signal receiver, the pressure gage, and the thermometer are placed in the containers and wherein the pressure fluctuation source, the pressure signal receiver, the pressure gage, and the thermometer are connected to a signal analyzing unit.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: June 24, 2003
    Assignees: Agency of Industrial Science and Technology, Japan Space Forum, National Space Development Agency of Japan
    Inventors: Akihiro Nakano, Nobukazu Ohnishi
  • Patent number: 6568248
    Abstract: The invention relates to a method and to apparatus for thermodynamic analysis of a mixture of fluids, in which the volume of a sample of a given quantity of said mixture is caused to vary step by step and in monotonic manner, and the pressure of the sample is read at each step, the sample being stirred at each step so as to hasten the mixture reaching thermodynamic equilibrium. According to the invention, the sample is stirred by applying ultrasound to said sample by means of transducer (20). The sample can be contained in a bag (19) of flexible material immersed together with the transducer in a control fluid inside a rigid container (10). The invention can be used to determine the bubble point of a mixture of hydrocarbons.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: May 27, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Paul Guieze, Pierre Le Foll
  • Patent number: 6553808
    Abstract: An apparatus to normalize a flow rate of a fluid in a main flow channel is provided. The apparatus uses a moveable member, such as a flexible membrane disposed for reciprocating displacement, to produce a constant dither flow of the fluid that is independent of fluid composition. This dither flow generates a signal output from a normalizing flow sensor that both represents a characteristic property of the fluid and a flow rate calibration factor. A similar apparatus to determine the characteristic property or flow rate calibration factor is also provided. The devices disclosed may be used in numerous industrial, process, and medical flow system applications for normalization of flow sensors and to derive other properties of a fluid.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: April 29, 2003
    Assignee: Honeywell International Inc.
    Inventors: Ulrich Bonne, David Kubisiak
  • Patent number: 6526828
    Abstract: A piezoelectric crystal element and a sensor utilizing the same are presented for use in a sensor device for identifying at least one foreign material from environment. The crystal element comprises at least one crystal resonator in the form of an inverted mesa structure, which has a membrane-like region and is characterized by a certain resonance frequency value. A surface region of the crystal resonator is modified by reactive molecules of a kind capable of interacting with the foreign material to yield a reaction product that effects a change in the resonance frequency of the crystal resonator from said certain resonance frequency value. This change is indicative of the identity and quantity of the foreign material.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: March 4, 2003
    Assignee: M.S. Tech Ltd.
    Inventors: Lev Dayan, Yohai Y. Dayagi, Moshe Shalom
  • Patent number: 6523392
    Abstract: An apparatus and method for sensing chemical and/or biological analytes includes a deflectable arm of a microcantilever formed over and contacting a sensing element. A gaseous or liquid medium which may include the analyte being detected, is introduced to the sensing element. The sensing element undergoes volumetric expansion or contraction in the presence of the analyte sought to be detected, typically by adsorbing the analyte. The volumetric change of the sensing element causes the deflectable arm to deflect. The deflectable arm includes at least one measurable physical property which changes when the arm deflects. Detecting means are provided to measure the change in the physical property to determine the presence and amount of analyte present. An array of microcantilevers in which each microcantilever is dedicated to detecting a particular analyte which may be included in the medium, is also provided.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: February 25, 2003
    Assignee: Arizona Board of Regents
    Inventors: Timothy L. Porter, Michael P. Eastman
  • Patent number: 6517237
    Abstract: An energy meter which measures a volume of gas supplied, which measures a calorific value of the gas supplied, and which calculates an energy value corresponding to the measured volume of gas supplied and the calorific value. The structure to measure the volume of the gas supplied and to calculate the energy value may be provided in a single unit. The structure to measure the calorific value of the gas supplied preferably includes a structure to measure the speed of sound in the gas and further preferably measures a first thermal conductivity of the gas at a first temperature and measures a second thermal conductivity of the gas at a second temperature which differs from the first temperature, and is arranged to produce the calorific value of the gas corresponding to the measured speed of sound in the first and second thermal conductivities.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: February 11, 2003
    Assignee: Lattice Intellectual Property Limited
    Inventors: Paul Steven Hammond, Robert Richard Thurston, Barry Leonard Price
  • Patent number: 6492601
    Abstract: A controller for a quartz crystal microbalance (QCM) sensor system and method for detecting mass deposition on a QCM sensor. The controller controls a QCM using temperature-, voltage- and current-regulating circuits, a microcontroller, an oscillator, heating and cooling devices and circuits, high voltage grids, digital-to-analog and analog-to-digital converters, data telemetry and uplink circuits, and a remote user. The remote user may be a person, computer, network or data logger. The remote user allows the controller to be reconfigurable during operation. The controller samples and reports data faster and is more reliable over extended periods of operation. Further, the controller is assembled using innovative techniques making it smaller and thus more transportable, easier to incorporate into existing facilities and less expensive to construct and operate. The apparatus may also be assembled in a modular fashion that allows for customization.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: December 10, 2002
    Assignee: The Johns Hopkins University
    Inventors: Russell P. Cain, Bliss G. Carkhuff, O. Manuel Uy