By Vibration Patents (Class 73/24.01)
  • Patent number: 8689606
    Abstract: A sensor chip (1030) for gas has cells (200) for emitting and receiving ultrasound and is configured for a sufficiently large frequency range and for measuring concentration of at least one of the gas components based on at least two responses within the range. The frequency range can be achieved by varying the size of cell membranes (230), varying bias voltages, and/or varying air pressure for an array (205) of cMUTs or MEMS microphones. The sensor chip can be applied in, for example, capnography. A measurement air chamber (515) is implemented in the respiratory pathway (400), and it and/or the pathway may be designed to reduce turbulence in the exhaled breath (120) subject to ultrasound interrogation. The chip (1030) can be implemented as self-contained in the monitoring of parameters, obviating the need for off-chip sensors.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: April 8, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Martijn Schellekens, Josephus Arnoldus Henricus Maria Kahlman, Martinus Gernardus Van Der Mark, Peter Dirksen
  • Publication number: 20140060153
    Abstract: An acoustical transformer having a last matching section that includes a protective barrier of low permeability. The protective barrier is in contact with a test medium. In one embodiment, the protective barrier comprises one or more low permeability layers, such as a metallic foil or metallic coating(s) disposed on a low impedance layer such as polyimide, so that the low impedance layer and the protective barrier constitute the last matching section of the acoustical transformer. In other embodiments, the protective barrier comprises a fluoropolymer. A method for determining the thicknesses of the various layers of the acoustical transformer for enhanced performance is also disclosed.
    Type: Application
    Filed: December 5, 2012
    Publication date: March 6, 2014
    Applicant: VEECO INSTRUMENTS INC.
    Inventors: Raymond C. Logue, Don N. Sirota, William E. Quinn, Owan C. Watkins, Maria D. Ferreira, Wei Zhang
  • Publication number: 20140000342
    Abstract: There is provided a meter for measuring the molecular weight of a gas, the meter comprising a housing having an inlet and an interior for receiving said gas to be measured, a sensor assembly comprising a high-frequency planar piezoelectric crystal oscillator located within said housing so that, in use, the piezoelectric crystal oscillator is in contact with said gas, said sensor assembly being arranged: to drive the piezoelectric crystal oscillator such that the piezoelectric crystal oscillator resonates at a single resonant frequency; to measure said single resonant frequency of said piezoelectric crystal oscillator to determine the density of gas; and to determine from the density, determined or pre-determined pressure of the gas and determined or pre-determined temperature of the gas, the molecular weight of the gas.
    Type: Application
    Filed: November 28, 2011
    Publication date: January 2, 2014
    Applicant: Air Products and Chemicals, Inc.
    Inventor: Neil Alexander Downie
  • Publication number: 20130312490
    Abstract: The invention relates to a device (7) for collecting particles and microorganisms present in ambient air, the device comprising a cyclone enclosure (8) for centrifuging air, the enclosure being of conical or frustoconical shape, external air inlet means (16) for admitting air into the enclosure (8), and air outlet means connected by coupling means (19, 20, 21) to air inlet filter means (4) of an individual motorized respiratory protection appliance (A).
    Type: Application
    Filed: October 19, 2011
    Publication date: November 28, 2013
    Applicant: BERTIN TECHNOLOGIES
    Inventors: Amandine Verdier, Daniel Trouchet, Julien Charpentier, Bruno Vallayer
  • Patent number: 8586351
    Abstract: A hybridization detecting device, wherein a probe cell has a body of semiconductor material forming a diaphragm, a first electrode on the diaphragm, a piezoelectric region on the first electrode, a second electrode on the piezoelectric region and a detection layer on the second electrode. The body accommodates a buried cavity downwardly delimiting the diaphragm.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: November 19, 2013
    Assignee: STMicroelectronics S.r.l.
    Inventors: Flavio Francesco Villa, Ubaldo Mastromatteo, Gabriele Barlocchi
  • Patent number: 8573031
    Abstract: A tunable nanoscale resonator has potential applications in precise mass, force, position, and frequency measurement. One embodiment of this device consists of a specially prepared multiwalled carbon nanotube (MWNT) suspended between a metal electrode and a mobile, piezoelectrically controlled contact. By harnessing a unique telescoping ability of MWNTs, one may controllably slide an inner nanotube core from its outer nanotube casing, effectively changing its length and thereby changing the tuning of its resonance frequency. Resonant energy transfer may be used with a nanoresonator to detect molecules at a specific target oscillation frequency, without the use of a chemical label, to provide label-free chemical species detection.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: November 5, 2013
    Assignee: The Regents of the University of California
    Inventors: Kenneth J. Jensen, Caglar O. Girit, William E. Mickelson, Alexander K. Zettl, Jeffrey C. Grossman
  • Patent number: 8567232
    Abstract: Techniques are generally described for detecting a concentration level of at least one gas. Some example devices may include a sensor including conductive plate on a surface of dielectric including a nanotube layer formed thereon. The conductive plate and the nanotube layer form a resonator that resonates at a frequency in response to an interrogation signal. The nanotube layer may be configured to associate with one or more gas molecules. The frequency at which the resonator resonates may shift according to which gas molecules are associated with the nanotube layer to identify a particular gas. An amount of resonance may be exhibited as a resonant response signal. An amplitude of the resonant response signal may be indicative of the concentration level of the detected gas.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: October 29, 2013
    Assignee: Empire Technology Development LLC
    Inventors: H. Sprague Ackley, Christopher A. Wiklof
  • Publication number: 20130263887
    Abstract: A dissolved nitrogen concentration monitoring method is used for monitoring a dissolved nitrogen concentration of a cleaning liquid when an ultrasonic wave is irradiated onto the cleaning liquid in which a substrate is dipped. The method includes measuring an amount of increase of a dissolved oxygen concentration of the cleaning liquid resulting from an oxygen molecule generated from a water molecule as a result of a radical reaction caused by ultrasonic wave irradiation. A dissolved nitrogen concentration of the cleaning liquid is calculated from the measured amount of increase of dissolved oxygen concentration based on a predetermined relationship between a dissolved nitrogen concentration and an amount of increase of dissolved oxygen concentration.
    Type: Application
    Filed: December 13, 2011
    Publication date: October 10, 2013
    Applicant: SILTRONIC AG
    Inventors: Teruo Haibara, Etsuko Kubo, Yoshihiro Mori, Masashi Uchibe
  • Patent number: 8548755
    Abstract: Switching a transmitting and receiving direction of two transducers (2,3) in the forward and the reverse direction, a time differential memory part (17b) storing a propagation time differential every K times a unit measurement process being executed, the propagation time differential being a differential between a propagation time of the ultrasonic wave signal in a forward direction and in a reverse direction, a flow rate calculating part (15) calculating a flow rate of a passing fluid based on a lump sum of propagation times in both the forward and the reverse directions obtained at least every K times of a unit measurement process being executed, an estimating part (18) estimating a change in a momentary flow rate of the fluid based on the time differential obtained every K times of the unit measurement process being executed and storing thereof in a time differential memory part (17b), thus obtaining an accurate flow rate and detecting the change in the momentary flow rate.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: October 1, 2013
    Assignee: Panasonic Corporation
    Inventors: Koichi Takemura, Fumikazu Shiba, Daisuke Bessho
  • Patent number: 8544314
    Abstract: A carbon dioxide sensor comprising a first beam that includes a functionalized surface and a second beam that includes a functionalized surface such that reduced-drift differential sensing of carbon dioxide may be performed by monitoring changes in the resonant frequency of the first beam relative to the resonant frequency of second beam.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: October 1, 2013
    Assignee: Honeywell Romania S.R.L.
    Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
  • Patent number: 8516880
    Abstract: An exemplary gas sensing system includes a gas sensing unit, a detecting unit, and a processing unit. The gas sensing unit includes a quartz crystal substrate, a first electrode layer, a second electrode layer, a first activating layer, and a sensor medium layer having adsorption ability and desorption ability to chemical gas. The detecting unit is electrically connected with the first electrode and the second electrode, and is configured for detecting a frequency change of the gas sensing unit before and after adsorbing the chemical gas. The processing unit is electrically connected with the detecting unit, and is configured for obtaining a mass change of the gas sensing unit according to the frequency change.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: August 27, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Kai Pei
  • Patent number: 8492167
    Abstract: Methods and apparatuses for determining whether a fluid has been introduced into an assay measurement apparatus involving delivering a fluid to a surface of a resonant device. The methods also involve monitoring an electrical signal output by the resonant device, wherein properties of the electrical signal vary based on physical properties of the fluid in contact with the surface of the resonant device and determining if the electrical signal output by the resonant device satisfies a predetermined condition indicative of the presence of the fluid.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: July 23, 2013
    Assignee: BioScale, Inc.
    Inventors: Brett P. Masters, Michael F. Miller
  • Publication number: 20130167511
    Abstract: A method for operating a sensor element, in particular a lambda sensor, for determining the concentration of a gas component of a gas mixture, in which the gas component is removed from a measuring gas chamber by applying a pump voltage and the concentration of the gas component in the gas mixture is inferred therefrom. Oscillations of the pump current caused by dynamic pressure variations are taken into consideration for a correction of the sensor signal in that a frequency analysis of the pump current is carried out.
    Type: Application
    Filed: June 27, 2011
    Publication date: July 4, 2013
    Inventors: Lothar Diehl, Goetz Reinhardt, Thomas Seiler, Hartwig Lehle
  • Patent number: 8475715
    Abstract: A system having reduced gas interference that includes a fluid chamber and a resonant sensor device in fluid communication with a fluid in the fluid chamber. The system includes a fluid control device adapted to change at least one of the fluid flow or pressure within the fluid chamber to achieve substantial wetting of surfaces in proximity to the resonant sensor device. Fluid surfaces of the system can include a material to increase the wettability (e.g., hydrophilicity) of the fluid surfaces.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: July 2, 2013
    Assignee: BioScale, Inc.
    Inventors: Brett P. Masters, Michael F. Miller
  • Patent number: 8464577
    Abstract: To provide a quartz sensor capable of detecting a sensing target with high sensitivity also in measurement in a liquid phase in which a difference in Q values at the time of measurement in the liquid phase and in a vapor phase is small. In a quartz sensor 1 including an AT-cut quartz plate 11 having a capture layer (absorbing layer) 12 formed on one surface (XZ? surface) thereof and detecting a sensing target based on an amount of change in a frequency of a quartz resonator 10 caused when the sensing target is absorbed by the capture layer 12, there are formed electrodes 13 for oscillating the quartz plate 11 on end faces (XY? surfaces) mutually opposite in a Z? direction of the surface of the quartz resonator 10 on which the capture layer 12 is formed (XZ? surface).
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: June 18, 2013
    Assignee: Nihon Dempa Kogyo Co., Ltd.
    Inventor: Mitsuaki Koyama
  • Patent number: 8456062
    Abstract: A surface acoustic wave sensor device includes a main body and a liquid controller disposed external to the main body. The main body includes a sample chamber, a surface acoustic wave sensor connected to the sample chamber, a first disposal chamber connected to the surface acoustic wave sensor and channels connecting the sample chamber, the surface acoustic wave sensor and the first disposal chamber. The liquid controller controls flow of a sample through the main body.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: June 4, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hun Joo Lee, Soo Suk Lee, Eun Chul Cho
  • Patent number: 8448494
    Abstract: An electronic microbalance made in a semiconductor body accommodating an oscillating circuit adjacent to a diaphragm. A stack formed by a first electrode, a second electrode, and a piezoelectric region arranged between the first and the second electrode extends above the diaphragm. Any substance that deposits on the stack causes a change in the mass of the microbalance and thus in the resonance frequency of a resonator formed by the microbalance and by the oscillating circuit and can thus be detected electronically. A chemical sensor is obtained by forming a sensitive layer of a material suitable for binding to target chemicals on the stack. The sensitivity of the microbalance can be increased by making the first electrode of molybdenum so as to increase the piezoelectric characteristics of the piezoelectric region.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: May 28, 2013
    Assignee: STMicroelectronics S.R.L.
    Inventors: Ubaldo Mastromatteo, Flavio Francesco Villa, Gabriele Barlocchi
  • Publication number: 20130125622
    Abstract: A sound velocity sensor is defined by a hermetic multi-chambered enclosure for containing flowing gases and mixtures of gases. The contained flowing gases are acoustically excited and the acoustic energy is measured over a fixed distance between a first sending end of the enclosure and a receiving end. The speed of sound of the gases are determined by comparing the energy transmitted through the flowing gases at various frequencies so as to precisely determine the resonant frequency of the gases flowing through the enclosure. In accordance with the present design, the chambers of the enclosure include internal transition shapes therebetween for optimizing the transmission of acoustic energy through the flowing gases and also enhancing one or more additional resonant modes at higher useful frequencies. The transition shapes used in connection with the sensor can be at least one of parabolic, hyperbolic, linear and exponential in nature.
    Type: Application
    Filed: November 21, 2012
    Publication date: May 23, 2013
    Applicant: Inficon, Inc.
    Inventor: Inficon, Inc.
  • Patent number: 8381574
    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: July 23, 2010
    Date of Patent: February 26, 2013
    Assignee: Maquet Critical Care AB
    Inventor: Erik Cardelius
  • Patent number: 8375768
    Abstract: An electrochemical piezoelectric sensor is disclosed. The sensor includes a piezoelectric substrate, three (or more) electrodes over a first surface of the substrate, and another electrode over a second (opposing) surface of the substrate. An ionic liquid in the form of a film is adhered, bound, immobilized, or otherwise positioned over the substrate and electrodes of the first surface. The ionic liquid film permits the absorption and detection of analytes from a gaseous sample, for environmental gases, example explosive vapors and/or explosive vapor species in the gaseous sample. Detection (optionally including analyte quantitation and qualitative identification) can be performed by both electrochemical and piezoelectric techniques using a single sensor. Systems incorporating and methods of using the electrochemical piezoelectric sensor also are disclosed.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: February 19, 2013
    Assignees: Oakland University, Board of Trustees of Michigan State University
    Inventors: Xiangqun Zeng, Lei Yu, Yue Huang, Andrew J. Mason
  • Publication number: 20130031956
    Abstract: It is presented a method for detecting a gas (G). Acoustic waves (Wt) are generated and transmitted via a wave generating and sensing means (2) towards a reflecting wall (3) and thereafter reflected acoustic waves (Wt) are detected by the wave generating and sensing means (2) wherein a presence of the gas (G) is detected by determining a change in an output signal of the wave generating and sensing means (2). A gas detector (1) is also presented.
    Type: Application
    Filed: April 15, 2010
    Publication date: February 7, 2013
    Inventor: Vasile Mecea
  • Patent number: 8365576
    Abstract: Disclosed is a method for detecting a low concentration gas. In the method, a measurand gas containing the target gas in a concentration of 50 ppm or less is supplied to an oscillation element which contains a quartz crystal resonator and a zeolite including a metal complex (such as a zeolite including a cobalt phthalocyanine complex) present on or above the quartz crystal resonator. The target gas is then detected through a change in resonance frequency of the quartz crystal resonator, the change being caused by the adsorption of the target gas by the metal-complex-including zeolite.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: February 5, 2013
    Assignee: National University Corporation Nagoya Institute of Technology
    Inventors: Hideki Masuda, Tomohiko Inomata, Taku Sawaki
  • Patent number: 8349611
    Abstract: Resonant sensors, preferably having floating bilayer symmetry, and their methods of use is determining the presence, amount or binding kinetics of an analyte of interest in a test sample are disclosed. The test sample may be a liquid or gas.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: January 8, 2013
    Assignee: Leversense LLC
    Inventors: Jacob J. Loverich, Jeremy E. Frank, Peter A. Nagy
  • Patent number: 8342005
    Abstract: All-optical photoacoustic spectrometer sensing systems (PASS system) and methods include all the hardware needed to analyze the presence of a large variety of materials (solid, liquid and gas). Some of the all-optical PASS systems require only two optical-fibers to communicate with the opto-electronic power and readout systems that exist outside of the material environment. Methods for improving the signal-to-noise are provided and enable mirco-scale systems and methods for operating such systems.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: January 1, 2013
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Jack Kotovsky, William J. Benett, Angela C. Tooker, Jennifer B. Alameda
  • Publication number: 20120297859
    Abstract: The present invention relates generally to the detection of alcohol. The present invention relates more particularly to the film bulk acoustic wave resonator-based devices, and their use in the sensing of ethanol and/or acetone. One aspect of the invention is a method for detecting ethanol, acetone or both in a gaseous sample including: providing a film bulk acoustic wave resonator having a zinc oxide piezoelectric layer; exposing the film bulk acoustic wave resonator to the gaseous sample; determining the resonant frequency of the film bulk acoustic wave resonator; and determining the concentration of ethanol, the concentration of acetone, or both in the gaseous sample using the resonant frequency of the film bulk acoustic wave resonator.
    Type: Application
    Filed: January 20, 2011
    Publication date: November 29, 2012
    Applicant: Arizona Board of Regents, a body Corporate of the States of Arizona acting for and on behalf of Ariz
    Inventors: Hongyu Yu, Xiaotun Qiu
  • Publication number: 20120288780
    Abstract: A fuel cell system that determines the concentration of hydrogen gas in an anode loop. The fuel cell system includes at least one fuel cell, an anode inlet, an anode outlet, an anode loop, a source of hydrogen gas and an injector for injecting the hydrogen gas. First and second pressure sensors are provided in the anode loop and are spaced a known distance from each other. A controller responsive to the output signals from the first and second pressure sensors filters the sensor signals from the first and second pressure sensors and determines the concentration of hydrogen gas in the anode loop based on the time difference between the filtered sensor signal from the first pressure sensor and the filtered sensor signal from the second pressure sensor.
    Type: Application
    Filed: May 10, 2011
    Publication date: November 15, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Thomas W. TIGHE, Daniel C. DI FIORE
  • Patent number: 8302458
    Abstract: A portable analytical system for detecting organic chemicals in water comprising a miniature preconcentrator and a SAW detector, the latter being characterized by a nanoporous carbon coating that provides improved response compared to prior art polymer coatings, particularly when detecting low concentrations of trihalomethane chemicals, such as chloroform and bromoform.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: November 6, 2012
    Assignee: Parker-Hannifin Corporation
    Inventors: Kazi Zulfiqur Ali Hassan, William M. Cost, Curtis D. Mowry, Michael P. Siegal, Alex Robinson, Joshua J. Whiting, Stephen W. Howell
  • Patent number: 8291745
    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: Grant
    Filed: June 30, 2009
    Date of Patent: October 23, 2012
    Assignee: Stichting IMEC Nederland
    Inventors: Devrez Mehmet Karabacak, Koray Karakaya
  • Patent number: 8288163
    Abstract: The present invention relates to a device and process for the quick and reliable online detection of triacetone triperoxide (TATP).
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: October 16, 2012
    Assignees: Rheinische Friedrich-Wilhelms-Universitaet Bonn, Max-Planck-Gesellschaft zur Foerderung der Wissenschaften E.V.
    Inventors: Siegfried R. Waldvogel, Jürgen Lörgen, Daniel Lubczyk, Klaus Müllen, Roland Bauer
  • Patent number: 8256275
    Abstract: An in-liquid-substance detection sensor that achieves size reduction and detection accuracy improvement includes a piezoelectric substrate, at least two SAW devices provided on one major surface of the piezoelectric substrate and each having at least one IDT electrode defining a sensing portion, outer electrodes provided on the other major surface of the piezoelectric substrate and electrically connected to the SAW devices through vias extending through the piezoelectric substrate, a channel-defining member provided on the one major surface of the piezoelectric substrate so as to surround the SAW devices and a region connecting the SAW devices to each other, thereby defining sidewalls of a channel, and a protective member bonded to the one major surface of the piezoelectric substrate with the channel-defining member interposed therebetween, thereby sealing the channel, the protective member having at least two through holes communicating with the channel.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: September 4, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hajime Yamada, Naoko Aizawa, Yoshihiro Koshido, Koji Fujimoto, Toru Yabe, Michio Kadota
  • Patent number: 8252598
    Abstract: Methods and systems of detecting analytes using a microcantilever system are generally described. The microcantilever system generally includes micro- or nano-sized elements that can be electrostatically driven to resonance. Utilizing the disclosed devices and methods, direct electronic detection of the resonant frequency, changes of the resonant frequency, and associated phase signal of a micro- or nano-sized element can be utilized to measure the presence of a targeted analyte. The detection system of the present invention utilizes a non-contact microcantilever device. That is, the surface of the microcantilever (e.g., the surface of the resonating beam) does not bond or otherwise attach to an analyte or other chemical. Thus, the microcantilever device, including the resonating beam, can be kept in pristine condition during and even after repeated use.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: August 28, 2012
    Assignee: University of South Carolina
    Inventors: Goutam Koley, Muhammad Qazi, Thomas Vogt, Sangmoon Park
  • Patent number: 8247949
    Abstract: A surface acoustic wave sensor device includes a main body and a liquid controller disposed external to the main body. The main body includes a sample chamber, a surface acoustic wave sensor connected to the sample chamber, a first disposal chamber connected to the surface acoustic wave sensor and channels connecting the sample chamber, the surface acoustic wave sensor and the first disposal chamber. The liquid controller controls flow of a sample through the main body.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: August 21, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hun Joo Lee, Soo Suk Lee, Eun Chul Cho
  • Publication number: 20120192620
    Abstract: The present invention provides a novel analysis and detection device, which includes a separation unit for separating a plurality of single-component gases from the mixed components of a gaseous sample; a detection unit for producing a sound signal in response to a corresponding one of the single-component gases; and a signal receiving unit for transferring the sound signal into an electronic signal. The device of the present invention uses gas chromatography principle to separate mixed components of a gaseous sample, a plurality of single-component gases are formed to be detected, a sound signal is formed in response to a corresponding one of the single-component gases, and the components and their amounts are determined according to occurrence time and frequency of the sound signal. The present invention is applicable to a rapid detection and a quantitation analysis of a gas.
    Type: Application
    Filed: May 9, 2011
    Publication date: August 2, 2012
    Applicant: NATIONAL TAIWAN NORMAL UNIVERSITY
    Inventors: Cheng-Huang Lin, Chien-Hung Lin, Yi-Shiuan Li, Yi-San He
  • Patent number: 8230720
    Abstract: A resonant nanosensor apparatus associated with a functionalized monolayer for detecting carbon dioxide and a method of forming the same. A wafer including a sensing vibrating beam and a reference vibrating beam may be functionalized with a functional group in order to form a sensing self monolayer. The sensing self assembled monolayer may be configured by bridging oxygen or carbon atoms covalently bonded with respect to the vibrating beams. A liquid solution of hydrochloric acid may then be applied to the sensing self assembled monolayer at the surface of the reference beam by a direct printing process to obtain a reference monolayer. The liquid solution of HCl transforms the functional groups responsible for the carbon dioxide detection into protonated groups, which do not react with carbon dioxide, but possess visco-elastic properties similar to that of the sensing monolayer.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: July 31, 2012
    Assignee: Honeywell International Inc.
    Inventors: Bogdan-Catalin Serban, Cornel Cobianu, Mihai N. Mihaila, Viorel-Georgel Dumitru
  • Patent number: 8227261
    Abstract: Methods and apparatuses for performing assays involving binding material elements with a plurality of bonds over a substantial area of a surface of a resonant device establishing a normalized exposure. The methods and apparatuses also involve controlling an external influence applied to the material elements over a first period of time and measuring a signal during a second period of time that is indicative of the change in the amount of material elements bound to the surface relative to the normalized exposure. In some cases, the measured signals are integrated with respect to time to determine the time averaged amount of material elements bound to the surface.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: July 24, 2012
    Assignee: BioScale, Inc.
    Inventors: Brett P. Masters, Michael F. Miller, Alexis F. Sauer-Budge
  • Patent number: 8215170
    Abstract: A device for sensing a chemical analyte is disclosed. The device is comprised of a vibrating structure having first and second surfaces and having an associated resonant frequency and a wire coupled between the first and second surfaces of the vibrating structure, wherein the analyte interacts with the wire and causes a change in the resonant frequency of the vibrating structure. The vibrating structure can include a tuning fork. The vibrating structure can be comprised of quartz. The wire can be comprised of polymer. A plurality of vibrating structures are arranged in an array to increase confidence by promoting a redundancy of measurement or to detect a plurality of chemical analytes. A method of making a device for sensing a chemical analyte is also disclosed.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: July 10, 2012
    Assignee: Arizona Board of Regents
    Inventors: Nongjian Tao, Salah Boussaad
  • Patent number: 8166799
    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: Grant
    Filed: March 5, 2009
    Date of Patent: May 1, 2012
    Assignee: Toppan Printing Co., Ltd
    Inventor: Noritaka Nakaso
  • Publication number: 20120060873
    Abstract: A method of detecting a wavelength includes inserting at least two sound pressure sensors in parallel with each other into a liquid to which waves are applied, the sound pressure sensors formed into a bar-like shape and having the same sensitivity, establishing a first synchronized state in which waves detected by the sound pressure sensors are synchronized with each other, moving the sound pressure sensors relative to each other in a longitudinal direction, to break the first synchronized state and then establish a second synchronized state in which the waves detected by the sound pressure sensors are again synchronized with each other, and detecting a wavelength of the detected waves according to a quantity of the relative movement of the sound pressure sensors between the first and second synchronized states. The method easily detects a wavelength of waves applied to the liquid and the detected wavelength is usable to evaluate and control a total amount of dissolved gases in the liquid.
    Type: Application
    Filed: August 5, 2011
    Publication date: March 15, 2012
    Applicant: NHK SPRING CO., LTD.
    Inventor: Shuichi Akutsu
  • Patent number: 8117897
    Abstract: An elliptical photo-acoustic spectrometer chamber design will result in a larger intensity signal at the pick-up microphone and allow high frequency light modulation. This makes the spectrometer have a lower limit of detection threshold, and will increase the signal to noise ratio in general for the instrument, resulting in a more sensitive instrument allowing more precise measurements.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: February 21, 2012
    Assignee: Applied Nanotech Holdings, Inc.
    Inventors: Donald R. Schropp, Jr., Igor Pavlovsky, Richard Lee Fink
  • Patent number: 8097067
    Abstract: Herein are disclosed devices and methods that can be used to provide an indication of the need to change a filter in a small forced air handling unit, based on the actual operating time (runtime) of the unit. The methods rely on the use of at least one vibration sensor that is placed in contact with a surface of an exterior component of the air handling unit and that can determine whether the unit is operating by sensing vibrations of the surface caused by operation of the unit.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: January 17, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Andrew R. Fox, Dennis M. Glass
  • Publication number: 20120006096
    Abstract: Techniques are generally described for detecting a concentration level of at least one gas. Some example devices may include a sensor including conductive plate on a surface of dielectric including a nanotube layer formed thereon. The conductive plate and the nanotube layer form a resonator that resonates at a frequency in response to an interrogation signal. The nanotube layer may be configured to associate with one or more gas molecules. The frequency at which the resonator resonates may shift according to which gas molecules are associated with the nanotube layer to identify a particular gas. An amount of resonance may be exhibited as a resonant response signal. An amplitude of the resonant response signal may be indicative of the concentration level of the detected gas.
    Type: Application
    Filed: July 9, 2010
    Publication date: January 12, 2012
    Inventors: H. Sprague Ackley, Christopher A. Wiklof
  • Patent number: 8069703
    Abstract: A new method for the semi-continuous detection of heavy metals and metalloids including mercury in gaseous streams. The method entails mass measurement of heavy metal oxides and metalloid oxides with a surface acoustic wave (SAW) sensor having an uncoated substrate. An array of surface acoustic wave (SAW) sensors can be used where each sensor is for the semi-continuous emission monitoring of a particular heavy metal or metalloid.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: December 6, 2011
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Evan J. Granite, Henry W. Pennline
  • Patent number: 8060334
    Abstract: An aircraft Ice Detection pitot-static tube is described which uses sensors integrated into the pitot-static tube to determine when and where the pitot-static tube is icing up. Temperature, thermal conductivity and impedance sensor measurements are combined with a mathematical transfer of the impedance sensor output into the complex dielectric plane to identify that the material accreating on the exterior and interior of the pitot-static tube is ice and only ice. Identification of ice realized when the trace in complex dielectric space has a distinctive semi-circular form, which only ice exhibits, with measured values in agreement with reference laboratory data stored in the onboard computer system.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: November 15, 2011
    Inventor: Philip Onni Jarvinen
  • Publication number: 20110172486
    Abstract: The invention provides a method of preparing a suspension of microbubbles for use in a carrier liquid, wherein the microbubbles have a gas core and a liquid shell, said liquid shell comprising magnetic nanoparticles, and wherein the microbubbles satisfy the following conditions: (i) the force due to buoyancy (FBW) of the microbubble in the carrier liquid is greater than the weight (W) of the microbubble; (ii) the magnetic force (FM) on the microbubble due to a magnetic field applied to the carrier liquid is greater than the combined weight (W) and force due to buoyancy (FBW) of the microbubble; (iii) said magnetic force (FM) on the microbubble is greater than the force due to viscous drag (FD) on the microbubble due to flow of the carrier liquid; and (iv) the scattering cross section (?scat) of the microbubble to ultrasound allows the microbubble to be detectable and rupturable on exposure to ultrasound.
    Type: Application
    Filed: June 26, 2009
    Publication date: July 14, 2011
    Inventors: Quentin Andrew Pankhurst, Eleanor Phoebe Jane Stride, Colin David Porter, Ana García Prieto
  • Patent number: 7930923
    Abstract: A nanocrystalline ITO thin film formed on a quartz crystal microbalance (QCM) facilitates detection of gaseous compounds emitted from an analyte. Adsorption of gas molecules onto the nanocrystalline ITO thin film changes the resonant frequency of the quartz crystal. Parameters such as the frequency of oscillation, surface resistance, integrated frequency response, integrated surface resistance response, initial response slope, average return to baseline slope, and/or return to baseline time/initial response time ratio of the quartz crystal with the nanocrystalline ITO thin film formed thereon are determined. Using the determined parameters and principal component analysis, principal components for the gaseous compounds are also determined. These determined principal components may be compared with known principal components corresponding to known analytes.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: April 26, 2011
    Assignee: The University of North Florida Board of Trustees
    Inventors: Nirmalkumar G. Patel, Jay S. Huebner, Brian E. Stadelmaier, Jason J. Saredy
  • Publication number: 20110077872
    Abstract: According to one embodiment, a system for detecting and identifying gases includes a piezoresistive microcantilever transducer, wherein dissipation of heat from the piezoresistive microcantilever into one or more gases is measured by changes in an electrical resistance of the piezoresistor, a vibrating microcantilever transducer, wherein shifts are measured in resonant frequency of the vibrating microcantilever due to viscous damping thereof by the one or more gases, and a subsystem for correlating the measured resistance changes and the resonant frequency shifts to the one or more gases. In another embodiment, a method for detecting and identifying one or more gases includes determining dissipation of heat from a microcantilever into one or more gases, and determining shifts in resonant frequency of the microcantilever due to viscous damping thereof by the one or more gases. Other systems, methods, and computer program products are also described according to more embodiments.
    Type: Application
    Filed: August 6, 2010
    Publication date: March 31, 2011
    Applicant: Lawrence Livermore National Security, LLC
    Inventors: Albert Loui, Donald J. Sirbuly, Selim Elhadj, Scott K. McCall, Bradley R. Hart, Timothy V. Ratto
  • Patent number: 7913541
    Abstract: The design and synthesis of a matrix nanocomposite containing amino carbon nanotubes used as a functionalized sensing layer for carbon dioxide detection by means acoustic wave sensing devices, e.g., SAW/BAW devices. These sensing materials contain a type of amino carbon nanotubes (single walled or multi-walled) and a polymer (or other compounds) which are sensitive to carbon dioxide in the acoustic wave sensing device based gas sensors. The sensitivity of the matrix consisting of the amino carbon nanotubes and a polymer (or other compounds) is ensured by the presence of amino groups which can react at room temperature with CO2 in a reversible process to form carbamates.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: March 29, 2011
    Assignee: Honeywell International Inc.
    Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mircea Bercu, Nicolae Varachiu, Mihai N. Mihaila, Cazimir G. Bostan, Stefan Ioan Voicu
  • Patent number: 7886577
    Abstract: An ionic liquid bound on an exposed surface of a device such as for detecting organic chemicals, preferably a gas sensor is described. 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. A single gas sensor, or an array of sensors, can be used for the detection and quantitative analysis of gas vapors.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: February 15, 2011
    Assignee: Oakland University
    Inventor: Xiangqun Zeng
  • Patent number: 7886575
    Abstract: Acoustic sensing utilizing a bridge structure coupled about a portion of at least two sides of said bridge to a base substrate, wherein said bridge includes a piezoelectric section and has at least one active acoustic region proximate said bridge. A sensing material is disposed on at least a portion of at least one surface of the bridge, wherein the bridge produces stress effects measurable by an acoustic wave device located in the active acoustic region. According to one embodiment, the stress effects are measured by an acoustic wave device to sense a target matter. As target molecules accumulate on a sensing film affixed to at least a portion of the bridge, stress is produced in the bridge inducing a frequency change measured by an acoustic wave device.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: February 15, 2011
    Assignee: Delaware Capital Formation, Inc.
    Inventors: Reichl B Haskell, Daniel S Stevens, Jeffrey C Andle
  • Publication number: 20100294020
    Abstract: Disclosed is a method for detecting a low concentration gas. In the method, a measurand gas containing the target gas in a concentration of 50 ppm or less is supplied to an oscillation element which contains a quartz crystal resonator and a zeolite including a metal complex (such as a zeolite including a cobalt phthalocyanine complex) present on or above the quartz crystal resonator. The target gas is then detected through a change in resonance frequency of the quartz crystal resonator, the change being caused by the adsorption of the target gas by the metal-complex-including zeolite.
    Type: Application
    Filed: November 24, 2009
    Publication date: November 25, 2010
    Applicant: NATIONAL UNIVERSITY CORPORATION NAGOYA INSTITUTE OF TECHNOLOGY
    Inventors: Hideki Masuda, Tomohiko Inomata, Taku Sawaki