By Vibration Patents (Class 73/24.01)
  • Publication number: 20100281949
    Abstract: An apparatus for determining the proportion of gases in a gas mixture, has a measurement chamber having a chamber defining structure, a gas inlet and a gas outlet, an ultrasound source and an ultrasound detector mounted such that the ultrasound source is capable of transmitting ultrasound through the chamber to the ultrasound detector; a temperature sensor mounted such that the sensor is capable of sensing the temperature in the chamber. The chamber defining structure is adapted to amplify thermal exchange with a gas content in the chamber so as to suppress a temperature change in the chamber.
    Type: Application
    Filed: July 23, 2010
    Publication date: November 11, 2010
    Inventor: Erik Cardelius
  • Publication number: 20100275675
    Abstract: The invention relates to a sensor (1) and a method for measuring pressure, variation in sound pressure, a magnetic field, acceleration, vibration, or the composition of a gas. The sensor (1) comprises an ultrasound transmitter (2), and a cavity (4) arranged in connection with it. According to the invention, the sensor (1) comprises a passive sensor element (3, 3?) located at the opposite end of the cavity (4) to the ultrasound transmitter (2), the distance of which from the ultrasound transmitter (2) is selected in such a way that the resonance condition is met at the ultrasound frequency used, the ultrasound transmitter (2) comprises a light-construction diaphragm oscillator (9), which is thus well connected to the surrounding medium, and the sensor includes means for measuring the interaction between the ultrasound transmitter (2) and the cavity (4).
    Type: Application
    Filed: December 4, 2008
    Publication date: November 4, 2010
    Inventors: Heikki Seppa, Teuvo Sillanpää
  • Patent number: 7814777
    Abstract: The present invention relates to a photo-acoustic device (100) for photo-acoustic analysis of a sample such as exhaled human breath. The device includes a sample cell cavity (102) for containing the sample (116), a first light source (130) outside the sample cell cavity for emitting a first modulated light beam (114) at a wavelength in an absorbing range of the searched component. The first light beam is led into the cavity through a transparent cavity wall (106). The searched gas component absorbs the first light beam and first acoustic waves are thus generated which are picked up by the microphone (110). The microphone also picks up background acoustic waves caused by the laser light beam going trough the cavity wall. The device is further equipped with a noise cancellation system (120, 122) that generates a second set of acoustic waves in anti-phase with the background acoustic waves.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: October 19, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Hans Van Kesteren
  • Patent number: 7814776
    Abstract: Methods for sensing and building sensors provide for adding nanotubes to a sensor to improve characteristics such as the Q-factor associated with the sensor. Mass loading and damping characteristics of micromachined quartz crystal resonators on which a thin film of debundled single-walled carbon nanotube (SWNT) has been deposited are disclosed. An absolute mass sensitivity of ˜100 fg was experimentally measured by monitoring the continuous desorption of gases from SWNT surfaces in a vacuum ambient.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: October 19, 2010
    Assignee: The Penn State Research Foundation
    Inventors: Peter C. Eklund, Abhijat Goyal, Srinivas A. Tadigadapa
  • Patent number: 7816837
    Abstract: A surface acoustic wave sensor for detecting a target substance by measuring the change in frequency due to the mass applied to a reaction membrane placed on a surface acoustic wave element having high sensitivity due to the improvement of the surface acoustic wave element structure. The surface acoustic wave sensor includes an SH-type surface acoustic wave and a rotated Y-cut LiTaO3 substrate having Euler angles (0°, 120° to 140°, 0°±5°); electrodes principally containing Au, for exciting a surface acoustic wave, the electrodes being arranged on the LiTaO3 substrate; and a reaction membrane bound to a target substance or a binding substance bound to the target substance covering the electrodes arranged on the LiTaO3 substrate. The interdigital transducers have a normalized thickness of about 3.0% to about 5.0%, the normalized thickness being determined by normalizing the thickness of the interdigital transducers by the wavelength of the surface acoustic wave.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: October 19, 2010
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Koji Fujimoto, Michio Kadota, Yoshiharu Yoshii
  • Patent number: 7784327
    Abstract: An apparatus for determining the proportion of gases in a gas mixture, has a measurement chamber having a chamber defining structure, a gas inlet and a gas outlet, an ultrasound source and an ultrasound detector mounted such that the ultrasound source is capable of transmitting ultrasound through the chamber to the ultrasound detector; a temperature sensor mounted such that the sensor is capable of sensing the temperature in the chamber. The chamber defining structure is adapted to amplify thermal exchange with a gas content in the chamber so as to suppress a temperature change in the chamber.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: August 31, 2010
    Assignee: Maquet Critical Care AB
    Inventor: Erik Cardelius
  • Publication number: 20100210008
    Abstract: A microfluidic substrate assembly includes a substrate body having at least one fluid inlet port. At least one microscale fluid flow channel in the substrate is in fluid communication with the inlet port for transport of a fluid to be tested. The substrate body also has a plurality of sockets, with each of one or sockets configured to receive an operative component. At least one socket is in communication with the microscale fluid flow channel.
    Type: Application
    Filed: November 13, 2009
    Publication date: August 19, 2010
    Applicant: Protasis Corporation
    Inventors: David Strand, David Barrow
  • Patent number: 7752886
    Abstract: The invention concerns a gas analyzer, which comprises: an electromagnet that has an air gap; a power source for supplying cyclically variable electrical current/voltage to said electromagnet; a sample gas conduit and a reference gas conduit opening into said air gap; an exit conduit communicating with said air gap for removing the intermixed sample and reference gases; pressure detecting microphone or microphones connected to said sample gas conduit and to said reference gas conduit for sensing gas pressures at a first acoustic measuring frequency in the respective conduits giving at least one acoustic pressure signal component; and electronics connected to said microphone(s) to receive said acoustic pressure signal component or components to form at least a first intermediate output signal describing content of a paramagnetic gas component in the sample gas.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: July 13, 2010
    Assignee: General Electric Company
    Inventors: Heikki Haveri, Kurt Weckström
  • Publication number: 20100126249
    Abstract: In an ultrasonic apparatus for measuring the concentration of gas provided with two ultrasonic oscillators for transmitting/receiving an ultrasonic wave, arranged opposite to each other in piping through which a sample gas flows, a temperature sensor, and a pressure sensor, an ultrasonic method and apparatus that can accurately measure gas concentration regardless of pressure of the sample gas are provided as an ultrasonic apparatus for measuring the concentration of gas comprising concentration calculating means for calculating sample gas concentration based on a propagation speed correction coefficient by pressure.
    Type: Application
    Filed: May 28, 2008
    Publication date: May 27, 2010
    Applicant: Teijin Pharma Limited
    Inventor: Taiga Matsuzaki
  • Patent number: 7681449
    Abstract: The present invention is a mechanical oscillator metal loss sensor for use in a corrosive or erosive environment. The elements include a mechanical oscillator that is mechanical excited with two regions that corrode differently, where the regions are determined to affect specific influences on the resonance parameters, wherein said mechanical oscillator has a resonant frequency, f, and a quality factor, Q. In a preferred embodiment, the mechanical oscillator has the shape of a tuning fork.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: March 23, 2010
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Henry Alan Wolf, Manuel S. Alvarez, James E. Feather, Philip J. Cacciatore, Jason B. English
  • Publication number: 20100058834
    Abstract: An on-chip low baseline drift SAW/LAW chemical sensor array and method of forming the same. A dual SAW delay line includes a common IDT for generating an acoustic wave and a pair of IDT for reception of the acoustic wave. One sensing layer or one reference layer can be deposited in position on each side of the common IDT. An ASIC chip includes on chip dual operational amplifiers and a mixer in order to obtain a differential measurement utilizing a difference being given by the sensing and the reference layers. A 3D technology can be employed in order to connect the sensor array and the ASIC in the same package and thereby form a 3D stack. The chemical sensor array and the ASIC can be configured in different packages and interconnected on the same substrate utilizing 2D technologies. A number of gases can be detected independently, and each gas can be detected differentially, with respect to its associated sensing layer and specific reference layer.
    Type: Application
    Filed: September 9, 2008
    Publication date: March 11, 2010
    Inventors: Cornel Cobianu, Ion Georgescu
  • Publication number: 20100037677
    Abstract: Disclosed is a wave sensor apparatus including a unit for removing a gas and a method of detecting a target material in a liquid sample, the method including removing a gas in the liquid sample.
    Type: Application
    Filed: June 17, 2009
    Publication date: February 18, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hunjoo LEE, Jae Chan PARK
  • Patent number: 7647813
    Abstract: A hydrogen sensor (100) with instant response that uses one or more quartz tuning forks (101, 102) while no chemical reactions or other material modifications are involved. Sensor (100) can be used in any application to measure percent range of hydrogen concentrations.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: January 19, 2010
    Assignee: Applied Nanotech Holdings, Inc.
    Inventor: Igor Pavlovsky
  • Patent number: 7647814
    Abstract: An environment difference detector includes an elastic surface wave element equipped with a substrate including a surface having an annular surface acoustic wave circulating path, a surface acoustic wave exciting/receiving unit exciting a surface acoustic wave along the circular path and receiving the circulated surface acoustic wave, and a sensitive film disposed on the circular path to change an elastic nature in accordance with a change in an adjacent environment, a speed/intensity measuring unit measuring a circulating speed and intensity of the surface acoustic wave from an electric signal generated by the unit when the unit receives the circulating surface acoustic wave, and an environment evaluation unit evaluating an environment adjacent to the sensitive film from at least one of the circulating speed and the intensity measured by the unit.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: January 19, 2010
    Assignees: Toppan Printing Co., Ltd., Yamatake Corporation, Ball Semiconductor Inc.
    Inventors: Noritake Nakaso, Shingo Akao, Kazushi Yamanaka, Dong Youn Sim, Ichitaro Satoh, Tetsuya Miyagishi
  • Publication number: 20100000292
    Abstract: A sensing device for detecting an analyte is disclosed. In one aspect, the device includes at least one geometrical structure and at least two clamps provided for clamping the at least one geometrical structure on at least two ends of the geometrical structure. The at least one geometrical structure has at least one chemical responsive layer being absorbent or adsorbent for the analyte, and a support structure provided for at least partly supporting the at least one chemical responsive layer. The at least one chemical responsive layer has a varying effective spring constant which changes upon absorption or adsorption of the analyte.
    Type: Application
    Filed: June 30, 2009
    Publication date: January 7, 2010
    Applicant: Stichting IMEC Nederland
    Inventors: Devrez Mehmet Karabacak, Koray Karakaya
  • Publication number: 20090314058
    Abstract: An apparatus for determining the proportion of gases in a gas mixture, has a measurement chamber having a chamber defining structure, a gas inlet and a gas outlet, an ultrasound source and an ultrasound detector mounted such that the ultrasound source is capable of transmitting ultrasound through the chamber to the ultrasound detector; a temperature sensor mounted such that the sensor is capable of sensing the temperature in the chamber. The chamber defining structure is adapted to amplify thermal exchange with a gas content in the chamber so as to suppress a temperature change in the chamber.
    Type: Application
    Filed: June 17, 2005
    Publication date: December 24, 2009
    Inventor: Erik Cardelius
  • Patent number: 7634937
    Abstract: Particle and multi-phase system monitoring methods, systems and apparatus are disclosed. Preferred embodiments comprise one or more mechanical resonator sensing elements. In preferred embodiments a sensor or a sensor subassembly is ported to a fluidized bed vessel such as a fluidized bed polymerization reactor.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: December 22, 2009
    Assignee: Symyx Solutions, Inc.
    Inventors: Ian Burdett, Timothy Lynn, Oleg Kolosov, Daniel Paul Zilker, Jr., Leonid Matsiev
  • Publication number: 20090229344
    Abstract: A gas concentration distribution measuring apparatus includes a gas detection part, a gas detector position information measuring part, and a gas concentration distribution display unit. The detection part includes gas detectors provided at mutually different positions to measure a concentration of a predetermined gas, and moves while maintaining relative positions of the detectors. The position information measuring part measures position information of the detectors of the detection part. And, measured values of gas concentrations measured by the detectors of the detection part and position information of the detectors measured by the position information measuring part when the detectors finish measurement of gas concentrations are inputted in the display unit, then the display unit displays a distribution of concentrations of the predetermined gas in a space in which the detection part moves, based on the measured values of the gas concentrations and the position information of the detectors.
    Type: Application
    Filed: March 5, 2009
    Publication date: September 17, 2009
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventor: Noritaka Nakaso
  • Patent number: 7579052
    Abstract: Highly sensitive sensor platforms for the detection of specific reagents, such as chromate, gasoline and biological species, using microcantilevers and other microelectromechanical systems (MEMS) whose surfaces have been modified with photochemically attached organic monolayers, such as self-assembled monolayers (SAM), or gold-thiol surface linkage are taught. The microcantilever sensors use photochemical hydrosilylation to modify silicon surfaces and gold-thiol chemistry to modify metallic surfaces thereby enabling individual microcantilevers in multicantilever array chips to be modified separately. Terminal vinyl substituted hydrocarbons with a variety of molecular recognition sites can be attached to the surface of silicon via the photochemical hydrosilylation process.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: August 25, 2009
    Assignee: UT-Battelle, LLC
    Inventors: Vassil I. Boiadjiev, Gilbert M. Brown, Lal A. Pinnaduwage, Thomas G. Thundat, Peter V. Bonnesen, Gudrun Goretzki
  • Patent number: 7574894
    Abstract: A gas measuring method, apparatus and system for measuring a concentration of a gas of interest is disclosed. The gas concentration is based on a propagation delay of a sonic or ultrasonic wave as the wave travels through the gas. The propagation delay is measured such that delay contributions from sources other than the gas itself are canceled. A sensor in accordance with the invention includes an sonic or ultrasonic transmitter and receiver, and a control module for performing calculations. The sensor can be used in various applications, including on-board inert gas generating systems (OBIGGS).
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: August 18, 2009
    Assignee: Parker-Hannifin Corporation
    Inventors: Howard Austerlitz, Lenard Hirshman, Ronald Bueter, Stan Wood
  • Patent number: 7555938
    Abstract: Systems and methods for thermally actuating piezoresistive cantilevers are described. One embodiment includes a nanoelectromechanical resonator connected in at least one location to a substrate, an electrically conductive path formed on the resonator and a signal source connected to the electrically conductive path and configured to provide an oscillating actuation signal capable of exciting a resonant mode in the resonator.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: July 7, 2009
    Assignee: California Institute of Technology
    Inventors: Igor Bargatin, Jessica L. Arlett, Michael L. Roukes, Inna Kozinsky, John Sequoyah Aldridge, Edward B. Myers
  • Patent number: 7556775
    Abstract: A microelectro-mechanical chemical sensor includes an active cantilever beam having a chemically selective material layer disposed thereon and at least one, preferably two, resistors with the resistance corresponding to the cantilever beam deflection. The sensor also has at least two, and preferably four, auxiliary cantilever beams adjacent to the active cantilever and attached to the same substrate, each having a piezoresistor disposed thereon. The piezoresistors are elements of a Wheatstone bridge, and the Wheatstone bridge output indicates the amount of a predetermined target chemical sorbed by the chemically selective material layer. The sensor is electrostatically actuated in order to monitor the resonant frequency.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: July 7, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert Andrew McGill, Ioana Voiculescu, Gary K. Fedder
  • Publication number: 20090110982
    Abstract: A fuel cell system including a quartz crystal microbalance (QCM) concentration sensor, and in particular, comprising a bypass channel structure useful for installing a QCM concentration sensor to a fuel cell system. The fuel cell system includes a fuel cell stack generating electric energy by an electrochemical reaction of a hydrogen-containing fuel and an oxidant, a fuel cell including a fuel supplying unit supplying the hydrogen-containing fuel to the fuel cell stack, a QCM concentration sensing unit for measuring the concentration of a fluid in the fuel cell, and a drive controlling unit for controlling the operation of the fuel cell according to an output of the QCM concentration sensing unit.
    Type: Application
    Filed: July 15, 2008
    Publication date: April 30, 2009
    Inventors: Seong-Kee Yoon, Jung-Kum Park, Hye-Jung Cho, In-Seob Song, Sang-Min Jeon, Dong-Kyu Lee, Myung-Sun Yoo
  • Patent number: 7524460
    Abstract: A System and Method of Molecule Counting Using Fluctuation Enhanced Sensors includes processes for improved chemical analyte detection and quantification through the measurement and generation of an amplitude density histogram of the measured time series of frequency fluctuations in the instantaneous frequency of a chemical sensor arranged to produce an oscillatory output signal when exposed to chemical substances. The system and method may use a chemical sensor, such as a surface acoustic wave (SAW) device. Statistical analysis produces the amplitude density of the frequency fluctuations, which are represented as a pattern that includes information about the quantity of the analyte on the surface of the sensor. Patterns in the measured amplitude density are then correlated to theoretical amplitude density functions in order to determine the number of analyte molecules on the surface of the sensor.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: April 28, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Gabor Schmera, Laszlo B. Kish
  • Patent number: 7513157
    Abstract: The invention relates to a method and device for determining the redox state of an anode (11), which is coated with a catalyst material or consisting thereof, associated with a high temperature fuel cell (10) or a reaction surface (16) of a reformer (13). According to the invention, at least one first resonator (3) of a piezoelectric sensor device (1) is arranged in the anode gas flow (5) of the high temperature fuel cell or in the gas flow of the reformer (13). The first resonator (3) is provided with a coating (4) which is oxidizable or reducible in the gas flow. The device also comprises a device (8) for measuring at least one modification of the resonance behaviour of the first resonator (3). The detected measuring value acts as an indicator of the redox state of the anode (11) of the high temperature fuel cell (10) or reaction surface (16) of the reformer (13).
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: April 7, 2009
    Assignee: AVL List GmbH
    Inventor: Herbert Thanner
  • Patent number: 7509860
    Abstract: This present invention relates to a system for measuring resonant frequency and delay time of the quartz crystal microbalance. The system includes a transistor oscillating circuit, a switch circuit, a comparator circuit, and a control circuit. The transistor oscillating circuit comprises a quartz oscillator for generating an original oscillating signal. The switch circuit is coupled to the transistor oscillating circuit for outputting a start signal to generate the original oscillating signal. The comparator circuit is coupled to the transistor oscillating circuit for transforming the original oscillating signal to a square wave oscillating signal. The control circuit is coupled to the comparator circuit for receiving the square oscillating signal to estimate the resonant frequency and the delay time of the quartz crystal microbalance.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: March 31, 2009
    Assignee: Tatung Company
    Inventors: Chao-Fa Lee, Tsong-Rong Yan, Cheng-Hsing Kuo
  • Publication number: 20090065007
    Abstract: In some embodiments, an oxygen concentrator may include lightweight injection molded housing components coupled to dual-pump diaphragm compressors. The oxygen concentrator may be coupled to a pressure transducer that detects a user's inhalation. The detected inhalation may signal the release of a bolus of oxygen. The sensitivity of the pressure transducer readings may be adjusted based on a detected environment. The user's breathing rate may also be determined to control the number of compressors used for increased efficiency. An ultrasonic sensor and gas flow rate meter may be used to determine an amount of oxygen being delivered to the user. Other components such as step valves and a solar panel may also be used to further conserve battery power. The oxygen concentrator may also incorporate an audio device such as a mobile phone.
    Type: Application
    Filed: June 27, 2008
    Publication date: March 12, 2009
    Inventors: William R. Wilkinson, Allan Sten Westersten, H. David Shockley, JR.
  • Publication number: 20090064693
    Abstract: A sensor system and method for analyzing a fluid contained within an environmental control system, comprising the steps of providing a system including a passage for containing a thermal change fluid; placing a sensor including a mechanical resonator in the passage; operating the resonator to have at least a portion thereof translate through the fluid; and monitoring the response of the resonator to the fluid in the passage. A preferred sensor includes a tuning fork resonator.
    Type: Application
    Filed: March 31, 2008
    Publication date: March 12, 2009
    Inventors: Leonid Matsiev, Oleg Kolosov, Mark D. Uhrich, William Rust, John M. Feland, III, John F. Varni, Blake Walker
  • Patent number: 7500379
    Abstract: An acoustic wave sensor array device is provided for the detection, identification, and quantification of chemicals and biological elements dispersed in fluids. The sensor array device is capable of the simultaneous characterization of a fluid for multiple analytes of interest. A substrate has a plurality of channels formed therein and a sensor material layer applied in a bottom of the channels. The sensor material layer has a shear acoustic wave speed lower than a shear acoustic wave speed in said substrate. The channels may have the same material in each channel or different materials in at least two of the channels. A surface acoustic wave transducer and at least one surface acoustic wave reflector, or at least two transducers is formed on a surface of the substrate opposite the channels at a portion of the substrate that is thinned by the channels, so that the acoustic tracks of the surface acoustic wave device extend along the channels.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: March 10, 2009
    Assignee: Applied Sensor Research & Development Corporation
    Inventor: Jacqueline H. Hines
  • Patent number: 7498720
    Abstract: A sensor includes a substrate 1 and at least one resonator, which includes an acoustic reflector 2, a piezoelectric layer 5, a first and second electrode 3, 4 placed on the same side of the piezoelectric layer 5, and a sensing layer 6. The sensing layer 6 reacts with a chemical or biological agent by absorption, adsorption, desorption or chemical reaction. As a result the individual frequency of a resonator changes and conclusions about the agent can be drawn. Such a sensor is very sensitive to an agent being sensed, especially when used in liquids.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: March 3, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Hans Peter Loebl, Matthias Wendt
  • Patent number: 7464580
    Abstract: An ionic liquid piezoelectric gas sensor for the detection of polar and nonpolar organic vapors. The gas sensor can operate at high temperatures with a fast linear response which is also reversible. At high temperatures, the frequency change (?f) versus concentration (C) curve mirrors the Henry's gas law, such that the concentration of a gas sample in liquid solvent is proportional to the concentration or partial pressure of the sample in gas phase. The gas sensor can be used for quantitative analysis of gas vapors and determination of Henry constants.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: December 16, 2008
    Assignee: Oakland University
    Inventors: Xiangqun Zeng, Lei Yu, Rex Xiaofeng Ren
  • Patent number: 7437907
    Abstract: In a sensor for detecting a substance in liquid, recesses are provided in the upper surface of a base substrate. The recesses respectively accommodate SAW elements. A resin layer having openings is arranged such that the sensing portions at the upper surfaces of the SAW elements are exposed in the openings. A reaction film made of a material capable of binding to a target substance is also arranged so as to cover the sensing portion of at least one of the SAW elements. A liquid containing a target substance is fed from the openings.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: October 21, 2008
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tetsuya Kimura, Koji Fujimoto, Kenjiro Okaguchi
  • Patent number: 7409851
    Abstract: Prefabricated catalyzing adsorption sites are incorporated into small oscillators. In one embodiment, the sites are formed of precisely positioned gold anchors on surface micromachined oscillators. The micromachined oscillators may be formed of silicon, such as polysilicon, or silicon nitride in various embodiments. The sites allow special control of chemical surface functionality for the detection of analytes of interest. Thiolate molecules may be adsorbed from solution onto the gold anchors, creating a dense thiol monolayer with a tail end group pointing outwards from the surface of the gold anchor. This results in a thiolate self-assembled monolayer (SAM), creating a strong interaction between the functional group and the gold anchor.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: August 12, 2008
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Bojan (Rob) Ilic, Harold G. Craighead
  • Patent number: 7389673
    Abstract: A sensor for detecting an analyte in liquid includes a base substrate provided with openings and electrode lands on one surface thereof and SAW elements each provided with a sensing portion having at least one IDT electrode on one side. The SAW elements are mounted on the base substrate with bump electrodes by a flip-chip bonding method so that the sensing portions of the SAW elements face the openings of the base substrate. At least one of the sensing portions is coated with a reaction membrane which binds to an analyte.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: June 24, 2008
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tetsuya Kimura, Koji Fujimoto, Kenjiro Okaguchi, Shinya Yamamoto, Ryoichi Morimoto, Toru Yabe
  • Patent number: 7387010
    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: April 5, 2007
    Date of Patent: June 17, 2008
    Assignee: Smiths Detection Inc.
    Inventor: Steven A. Sunshine
  • Publication number: 20080134755
    Abstract: A method of analyzing a gas specimen mixture includes measuring the concentrations of inert components in the gas specimen mixture and the pressure and temperature of the gas specimen mixture. A number of sample gas mixtures are generated with varying percentages of hydrocarbon gases, each including the measured inert component concentrations. For each generated sample gas mixture, the method includes calculating the speed of sound therein based on the measured pressure and temperature and the particular percentages of hydrocarbon gases therein, measuring the speed of sound in the gas specimen mixture, and iteratively comparing the measured speed of sound with the calculated speed of sound in different sample gas mixtures until convergence for a particular sample gas mixture. The molecular weight of the particular sample gas mixture is calculated, and set the molecular weight of the gas specimen mixture to the calculated molecular weight.
    Type: Application
    Filed: December 7, 2006
    Publication date: June 12, 2008
    Inventor: Yufeng HUANG
  • Patent number: 7350367
    Abstract: A system for monitoring a fluid in an environmental control system includes a mechanical resonator positioned for contacting a thermal change fluid. In some embodiments, the mechanical resonator is positioned in a passage for containing the thermal change fluid. Suitable thermal change fluids include an R-134A refrigerant, a mineral oil, an ester lubricant or a mixture thereof; a superheated refrigerant; or an elevated pressure and elevated temperature vapor, an elevated pressure liquid, a reduced pressure liquid, a reduced pressure vapor and combinations thereof. The mechanical resonator can be a flexural resonator or a torsion resonator. In some embodiments, the mechanical resonator is a tuning fork resonator. Methods of the invention include monitoring a response of the mechanical resonator to the thermal change fluid. In some embodiments, at least a portion of the mechanical resonator is translated through the thermal change fluid and the response of the resonator to the fluid is monitored.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: April 1, 2008
    Assignee: Visyx Technologies, Inc.
    Inventors: Leonid Matsiev, Oleg Kolosov, Mark D. Uhrich, William Rust, John M. Feland, III, John F. Varni, Blake Walker
  • Patent number: 7340941
    Abstract: Sensors for determining the ambient amount (e.g., concentration) of a chemical (e.g., molecular hydrogen in a gas or vapor) are disclosed. Preferred embodiments of these sensors comprise a dense thin metal (e.g., palladium or a palladium alloy) film disposed on a microcantilever beam that is suspended above a stationary baseplate. The dense thin metal film is configured to absorb, for example, hydrogen, thereby causing the film to expand which in turn causes the microcantilever beam to deform. The deformation can be measured, for example, as a change in capacitance between the microcantilever beam and the stationary baseplate. The measured change in capacitance is indicative of the ambient hydrogen concentration.
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: March 11, 2008
    Assignee: Xsilogy, Inc.
    Inventors: Bernd Fruhberger, David R. Baselt
  • Patent number: 7331231
    Abstract: A micro mass measuring apparatus includes a cantilever on which a subject is attached, a piezoelectric element formed on the cantilever, an oscillation circuit for actively vibrating the cantilever and providing a varied resonance frequency by the subject, and a frequency measuring device for measuring a resonance frequency of the cantilever.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: February 19, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soo-suk Lee, Won-kyu Moon, Yeol-ho Lee
  • Patent number: 7302829
    Abstract: The invention provides a contactless sensor device operable for sensing water vapor or a predetermined chemical vapor including a thin film, wherein the thin film includes a nanostructured sensing layer and a soft magnetic layer disposed directly adjacent to the nanostructured sensing layer. The thin film has a first mass, a first density, and a first magnetostrictive resonance frequency prior to the nanostructured sensing layer adsorbing a predetermined amount of a predetermined vapor and a second mass, a second density, and a second magnetostrictive resonance frequency subsequent to the nanostructured sensing layer adsorbing the predetermined amount of the predetermined vapor. The sensor device also includes a driving coil disposed indirectly adjacent to and at a predetermined distance from the thin film, the driving coil operable for generating an alternating-current magnetic field used to query a shift in the magnetostrictive resonance frequency of the thin film.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: December 4, 2007
    Assignee: General Electric Company
    Inventor: Anis Zribi
  • Patent number: 7299678
    Abstract: A measurement head particularly for borehole use can measure multiple parameters with no electronics in the head and only a single conductor cable. Double-ended tuning forks (26, 28 and 38, 40) in the head are arranged to respond to different parameters such as temperature and pressure by adjusting their resonant frequencies. A drive signal on the conductor (50) is applied to transducers (30, 32, 42, 44) on all the tuning forks and those whose instantaneous resonant frequency is close will resonate. The signal is removed and the transducers return a decaying signal at the resonant frequency along the conductor. Other drive frequencies are tried, to locate the other sensors whose frequency ranges are separate.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: November 27, 2007
    Assignee: Baker Hughes Incorporated
    Inventor: Eric Atherton
  • Patent number: 7268662
    Abstract: A hydrogen detecting system is characterized by a passive surface acoustic wave (SAW) sensor. The sensor includes a piezoelectric substrate having a self assembled monolayer arranged on at least a portion of the substrate to create a hydrophobic surface. A palladium nanocluster thin film is deposited on the monolayer and an interdigital SAW transducer is disposed upon the piezoelectric substrate for conversion of an RF signal into an acoustic wave and vice versa. At least one additional SAW element is also disposed on the substrate and spaced from the SAW transducer. The SAW element receives a signal from the SAW transducer and produces a response signal. The response signal is modified by the palladium nanocluster film due to a change in conductivity of the palladium nanocluster film upon exposure to hydrogen. This change in the response signal is measured by an interrogator, and yields a measure of the hydrogen concentration to which the sensor was exposed.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: September 11, 2007
    Assignee: Applied Sensor Research & Development Corporation
    Inventors: Jacqueline H. Hines, Leland P. Solie
  • Patent number: 7266989
    Abstract: A sensor system immersible in an ambient-fluid for sensing at least two conditions of the ambient fluid, includes a sealed chamber filled with a reference fluid of a known composition and/or pressure, and two acoustic transmission channels, one including the reference fluid, and the other including the ambient fluid. Measuring circuitry measures (a) the transit time of an energy wave through one transmission channel to determine the temperature of the fluid within the sealed chamber and thereby the temperature of the ambient fluid; and (b) the transit time of an energy wave through the other transmission channel to determine the composition and/or the pressure of the ambient fluid.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: September 11, 2007
    Assignee: Nexense Ltd.
    Inventor: Arie Ariav
  • Patent number: 7213444
    Abstract: An optoacoustic sensor for detecting one or more target gases includes a body featuring halves containing measurement cells. Each measurement cell is in communication with a light source and a microphone as well as the ambient atmosphere. Evaluation and control electronics are in communication with the light sources and the microphones sequentially illuminate the first and second light sources so that a measurement signal due to optoacoustic pressure variations from a target gas is generated by the microphone of the illuminated or gas active cell and a compensation signal is generated by the microphone of the non-illuminated or gas inactive cell. The compensation signal is subtracted from the measurement signal by the evaluation and control electronics to provide a sensor output signal.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: May 8, 2007
    Assignee: Carthago International Solutions, Inc.
    Inventors: Mourad Baraket, Urs Gerber, Olivier Ruffiner, Mauro Feltre
  • Patent number: 7201034
    Abstract: A gas concentration measurement instrument comprises: ultrasonic wave transmitting means for transmitting an ultrasonic wave according to an ultrasonic wave generation signal composed of a group of rectangular pulse waves; ultrasonic wave receiving means for converting the ultrasonic wave transmitted through the gas in the measurement region into an electric signal to use it as an ultrasonic wave reception signal; and gas concentration measuring means for measuring the signal output time when the ultrasonic wave generation signal is outputted, generating an envelope processing signal by subjecting the ultrasonic wave reception signal to an envelope extracting processing, measuring the threshold fall time when the envelope processing signal decreases below a predetermined threshold after exceeding the threshold, and measuring the difference between the threshold fall time and the signal output time as change in the gas concentration.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: April 10, 2007
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Tatsu Kobayakawa, Hideki Toda, Sachiko Saito
  • Patent number: 7201035
    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: March 2, 2006
    Date of Patent: April 10, 2007
    Assignee: Smiths Detection Inc.
    Inventor: Steven A. Sunshine
  • Patent number: 7197942
    Abstract: An apparatus 10 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 the velocity and volumetric flow rate of a single phase or multi-phase fluid 12 having a non-negligible axial Mach number 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 propagating with and against the flow of the fluid 12 in the pipe 14 using acoustic spatial array signal processing techniques. The apparatus, responsive to the measured speed of sound propagating with and against the flow of the fluid, determines the velocity and the flow rate of the fluid propagating through the pipe.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: April 3, 2007
    Assignee: CiDRA Corporation
    Inventors: Daniel L. Gysling, Douglas H. Loose
  • Patent number: 7194909
    Abstract: A pressure and vibration sensing apparatus designed to sense pressure together with vibration through one apparatus. The pressure and vibration sensing apparatus includes a case adapted to be mounted in a machine generating vibration and having an inlet communicated with a source of pressure, a pressure sensor sensing pressure variation in the case, and a vibrating member retractably disposed in the case to induce the pressure variation in the case when vibration is generated in the machine.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: March 27, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young Hoon Kang, Tai Eun Kim
  • Patent number: 7194891
    Abstract: A method of sensing the amount of a gas in a fluid flow includes operating an acoustic wave (AW) sensor at a first resonant frequency. The AW sensor includes a high temperature stable piezoelectric plate coupled to a first gas-absorbing layer. Also included is combining a fluid flow having a gas component with the first gas-absorbing layer at a temperature of at least about 500° C. At least one resonant frequency of the AW sensor is sensed. The amount of gas in the fluid flow is sensed by correlating the resonant frequency with the amount of gas absorbed in the first gas-absorbing layer. A sensor for sensing the amount of a gas in a fluid flow includes a first gas-absorbing layer, a high-temperature-stable piezoelectric plate coupled to the first gas-absorbing layer, and a controller coupled to the high-temperature-stable piezoelectric plate.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: March 27, 2007
    Assignee: Massachusetts Institute of Technology
    Inventors: Harry L. Tuller, Huankiat Seh, Takeo Hyodo
  • Patent number: 7178378
    Abstract: The disclosed sensor chip includes a substrate and a moving member coupled to the substrate and disposed for movement relative to the substrate. The moving member moves relative to the substrate in a first direction and in a second direction in response to movement of the substrate. The first direction is different than the second direction. The moving member includes a plurality of receptors. The receptors are configured for selectively binding to a first measurand.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: February 20, 2007
    Assignee: BioScale, Inc.
    Inventors: Ed Crawley, Mark Lundstrom, Brett Masters, Alok Srivastava, Martin Schmidt, Michael Miller