Fault Testing Of Sensor Or Component Patents (Class 204/401)
  • Patent number: 10718736
    Abstract: The operation of a measuring probe used for measuring at least one property of a process material is monitored or determined while the measuring probe is in use. The measured property can be a pH measurement, or a CO2 or oxygen concentration of the process material. The measuring probe has an electrode with a sensing element. When the sensing element is in contact with the process material, the electrode delivers a measurement signal to the measurement signal circuit, where the electrode voltage is related to the measured property. The signal-processing unit determines a measurement quantity of the measured property using the measurement signal. When a test signal is delivered by the signal source to the test signal circuit during a verification phase, a coupling element ensures galvanic isolation between the measurement signal circuit and the test signal circuit.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: July 21, 2020
    Assignee: Mettler-Toledo GmbH
    Inventor: Daniel Jungo
  • Patent number: 10677748
    Abstract: An analyte meter to detect an analyte concentration level in a bio-fluid sample may be cleaned and disinfected with a cleaning liquid without harming electrical and internal meter components. In some embodiments, the analyte meter is washable and immersable and may include a sealed sensor connector, sealed battery connector, and possibly a sealed USB connector that may be subjected to a cleaning liquid without the liquid entering an internal chamber of the analyte meter and contacting internal electronic components. In some embodiments, a sealed display screen and sealed keypad are provided such that liquids are prevented from entering the internal chamber. Manufacturing methods and systems utilizing the analyte sensors are provided, as are numerous other aspects.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: June 9, 2020
    Assignee: Ascensia Diabetes Care Holdings AG
    Inventors: Eugene Prais, David Huang, James A. Johnson, Igor Y. Gofman, Jun Chen
  • Patent number: 10605758
    Abstract: A method and device are provided for measuring a level of a clinically relevant analyte (such as glucose) in a fluid (such as blood). The device includes a flow path for conducting said fluid through the device; a detection chamber arranged on said flow path; and detector means arranged to detect analyte levels in the fluid in said chamber, wherein: said detection chamber contains a predetermined amount of an analyte such that that analyte mixes with fluid in the detection chamber to form, at the detector means, a calibration sample of the fluid at a time after the arrival of the fluid in said detection chamber, and said detector means is arranged to detect a first analyte level of an unadulterated sample of the fluid at a first time which is before the formation of said calibration sample and to detect a second analyte level of said calibration sample at a second time which is after the formation of said calibration sample.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: March 31, 2020
    Assignee: PA Knowledge Limited
    Inventors: Michael Noble, Craig Nelson, Mark Humphries, Carys Lloyd, David Edington, John Rippeth
  • Patent number: 10316780
    Abstract: A controller of an air-fuel-ratio sensor includes a control unit, a voltage-abnormality detecting unit, and a short-circuit-abnormality detecting unit. The control unit controls a current and a voltage of a gas sensor element through a plurality of terminals connected with the gas sensor element. The voltage-abnormality detecting unit changes, when at least one of voltages of the plurality of terminals is out of a predetermined range, a voltage level of an output voltage. The short-circuit-abnormality detecting unit causes, when the voltage level of the output voltage changes from a first voltage into a second voltage, a control unit to perform for a predetermined time a protective operation that suppresses currents from the control unit to the plurality of terminals, and detects, when the voltage level of the output voltage is the second voltage after the protective operation is released, a short-circuit abnormality.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: June 11, 2019
    Assignees: FUJITSU TEN LIMITED, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masatoshi Watanabe, Shigeto Umeyama, Motoki Komiya, Keisuke Kido, Chiharu Morisaki, Hiroto Miura
  • Patent number: 10250409
    Abstract: Systems, methods and computer programs products for a reconfigurable data distribution system are described herein. An embodiment includes a stream generator that receives analog data from a plurality of sensors. Data received from sensors, for example, may include video data received from an externally mounted camera on an armored vehicle. The stream generator converts analog data received from the sensors into a digital format that can be transmitted to a router. The router forwards the data in the digital format to a display processor. The display processor formats the data received from the router for display on a display device. The display processor may also receive data from other peripherals, including but not limited to, a touch screen device or a keypad. Furthermore, the display processor may communicate with the sensors and includes all operational information needed to operate the sensors that provide data to the stream generator, regardless of the sensors' operational platform.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: April 2, 2019
    Assignee: Synexxus, Inc.
    Inventors: Gregory Emil Glaros, Nandita Mangal
  • Patent number: 10234417
    Abstract: A method of operating a sensor to detect an analyte in an environment, wherein the sensor includes a working electrode and circuitry in operative connection with the working electrode, includes performing a sensor interrogation cycle including applying electrical energy to the working electrode to generate a non-faradaic current, measuring a response to the generation of the non-faradaic current to determine a state of the sensor, and actively controlling the circuitry to dissipate the non-faradaic current.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: March 19, 2019
    Assignee: MSA Technology, LLC
    Inventors: Brian Keith Davis, Michael Alvin Brown, Jerin Miller, Ryan Alan Sherry
  • Patent number: 10229583
    Abstract: Systems and methods for using multi-criteria state machines to manage alarming states and pre-alarming states of a hazard detection system are described herein. The multi-criteria state machines can include one or more sensor state machines that can control the alarming states and one or more system state machines that can control the pre-alarming states. Each state machine can transition among any one of its states based on sensor data values, hush events, and transition conditions. The transition conditions can define how a state machine transitions from one state to another. The hazard detection system can use a dual processor arrangement to execute the multi-criteria state machines according to various embodiments. The dual processor arrangement can enable the hazard detection system to manage the alarming and pre-alarming states in a manner that promotes minimal power usage while simultaneously promoting reliability in hazard detection and alarming functionality.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: March 12, 2019
    Assignee: GOOGLE LLC
    Inventors: Yoky Matsuoka, Anthony Michael Fadell, Matthew Lee Rogers, Jeffrey Lee
  • Patent number: 10188326
    Abstract: The invention disclosed herein includes sensors having three dimensional configurations that allow expansive “360°” sensing (i.e. sensing analyte from multiple directions) in the environments in which such sensors are disposed. Embodiments of the invention provide analyte sensors having foldable substrates adapted to produce optimized configurations of electrode elements as well as methods for making and using such sensors. Typical embodiments of the invention include glucose sensors used in the management of diabetes.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: January 29, 2019
    Assignee: MEDTRONIC MINIMED, INC.
    Inventors: Megan E. Little, Katherine T. Wolfe, Raghavendhar Gautham, Bradley C. Liang, Rajiv Shah
  • Patent number: 10094798
    Abstract: The present invention relates to the field of measuring and to electrochemical measurement, and more particularly to a reference electrode and to an arrangement for an electrochemical measurement. A reference electrode (13) for an electrochemical measurement according to the present invention comprises an inner reference element (14), which inner reference element (14) has been embedded into a solid electrochemically active composite material (15). An arrangement (16) for an electrochemical measurement comprises an inner reference element (17) and at least one indicator electrode (19), (20), which inner reference element (17) and the at least one indicator electrode (19), (20) have been embedded into a solid electrochemically active composite material (18). The solution according to the present invention may be utilized in any kind of electrochemical measurement in the fields of e.g. clinical analysis, environmental analysis and industrial analysis.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: October 9, 2018
    Assignee: Abo Akademi University
    Inventors: Tomasz Sokalski, Andrzej Lewenstam, Zekra Mousavi, Kim Granholm
  • Patent number: 10082482
    Abstract: A sensor element of an A/F sensor AS has a solid electrolyte layer, a first electrode arranged on one side of the solid electrolyte layer so as to be exposed to the exhaust gas of an internal combustion engine, and a second electrode arranged on the other side of the solid electrolyte layer so as to face an atmospheric air chamber. The sensor element generates a sensor output according to the oxygen concentration in the exhaust gas. A microcomputer supplies oxygen to the first electrode side from the second electrode side via the solid electrolyte layer by applying a predetermined voltage between the pair of electrodes of the sensor element. Moreover, the microcomputer determines a crack abnormality of the solid electrolyte layer based on electric current between the pair of electrodes which is generated with start of the oxygen supply.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: September 25, 2018
    Assignee: DENSO CORPORATION
    Inventors: Katsuhide Akimoto, Shuuichi Nakano, Yushi Fukuda, Tomofumi Fujii, Takahito Masuko, Toshihide Kumazaki
  • Patent number: 10082480
    Abstract: A gas concentration detection device for detecting a gas concentration using a limiting current type gas concentration sensor. In an application voltage line set to pass through a plurality of limiting current regions for different values of gas concentration, a ratio for lean is set as a ratio of change in current with respect to a change in voltage when an air/fuel ratio corresponding to the gas concentration is lean, and a ratio of rich different from the ratio for lean is set when the air/fuel ratio is rich.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: September 25, 2018
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Satoru Abe, Tomonori Uemura, Tetsuya Ito, Satoshi Teramoto
  • Patent number: 10054564
    Abstract: Systems and methods of fast power up for electrochemical sensors are provided. A system can include an electrochemical sensor, and a potentiostat circuit, wherein, upon startup, the potentiostat circuit drives the electrochemical sensor to the electrochemical sensor's normal operating condition at a rate that is not limited by voltage and/or current supply. A method can include a potentiostat circuit driving an electrochemical sensor to the electrochemical sensor's normal operating condition at a rate that is not limited by voltage and/or current supply.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: August 21, 2018
    Assignee: Life Safety Distribution AG
    Inventors: Keith Francis Edwin Pratt, Ali Hosseinmardi
  • Patent number: 9927413
    Abstract: Diagnostic processes for determining whether a NOx sensor is in a stuck-in-range failure mode may be performed when the NOx sensor reaches an operational temperature and before the oxygen pumps of the NOx sensor are activated and/or during operation. The processes may include interpreting values of a parameter indicative an amount of O2 and/or NOx measured by the NOx sensor. The processes include determining if the values of the parameter exceed a threshold value and indicating a failure of the NOx sensor responsive to the values not exceeding the threshold value. In some implementations, the processes may include increasing an amount of O2 in a chamber of the NOx sensor. Increasing the amount of O2 in the chamber of the NOx sensor may include deactivating an oxygen pump of the NOx sensor or reducing an amount of O2 removed via an oxygen pump of the NOx sensor.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: March 27, 2018
    Assignee: CUMMINS EMISSION SOLUTIONS, INC.
    Inventors: Jinqian Gong, Sergio Manuel Hernandez-Gonzalez, Ruqiat O. Shifatu-Badru
  • Patent number: 9869656
    Abstract: In an impedance detector, a current application portion applies a first current and a second current, directions of which are opposite to each other, to an element of an oxygen concentration sensor. A detection portion detects a difference between a current application prior voltage and a current application subsequent voltage. The current application prior voltage is a voltage between both of ends of the element before being applied with the first current, and the current application subsequent voltage is a voltage between both of the ends of the element when being applied with the first current. An impedance calculation portion calculates an impedance of the element based on the difference detected by the detection portion and a value of the first current. The current application portion is configured to change a current application time to apply the first current and the second current according to a command provided thereto.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: January 16, 2018
    Assignee: DENSO CORPORATION
    Inventor: Shinya Uemura
  • Patent number: 9816125
    Abstract: A test strip, a detecting device, and a detecting method are disclosed. The test strip includes a first specimen path, a first electrode set, a second specimen path, a second electrode set, and a reaction reagent. When the specimen contacts the first electrode set and the second electrode set, a first pulse signal and a second pulse signal are generated for obtaining a flow time of the specimen. When the specimen contacts the reaction reagent, the analyte concentration of the specimen can be obtained, and the concentration of the analyte can be corrected by the flow time.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: November 14, 2017
    Assignee: YSP CO., LTD.
    Inventor: Tien-Tsai Hsu
  • Patent number: 9759713
    Abstract: A hand-held test meter for use with an electrochemical-based analytical test strip in the determination of an analyte in a bodily fluid sample includes a housing, a micro-controller disposed in the housing, a test strip simulation passive circuit block disposed in the housing, and a strip port connector (“SPC”) configured to operationally receive an electrochemical-based analytical test. The test strip simulation passive circuit block is in electrical communication with the SPC and the SPC is configured in electrical communication with the micro-controller. In addition, the test strip simulation passive circuit block is configured to simulate insertion of an electrochemical-based analytical test strip into the SPC and also to simulate application of a bodily fluid sample to an electrochemical-based analytical test strip inserted into the SPC by presenting one or both of (i) an alternating current (AC) load to SPC; and (ii) a direct current (DC) load to the SPC.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: September 12, 2017
    Assignee: LifeScan Scotland Limited
    Inventor: David Elder
  • Patent number: 9746465
    Abstract: A magnetic bead-based digital microfluidic immunoanalysis device and a method thereof are provided, which includes a lower plate, an upper plate disposed above the lower plate, a separating structure therebetween and a magnet disposed on the upper plate or the lower plate. The lower plate includes a first electrode layer including a plurality of channel electrodes with different sizes. A droplet containing few magnetic beads is adapted to be disposed on the lower plate and corresponding to the channel electrodes. The magnet attracts the magnetic beads to approach to the smaller one of the channel electrodes though a magnetic force, and when a voltage is applied to the first electrode layer, the droplet is divided to a detection portion with the magnetic beads and a waste-liquid portion without the magnetic beads respectively corresponding to the smaller one and the larger one of the channel electrodes through a dual-direction electrowetting-on-dielectric force.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: August 29, 2017
    Assignee: National Chiao Tung University
    Inventors: Wensyang Hsu, Cheng-Yeh Huang, Po-Yen Tsai, Po-Huai Shih, Shih-Kang Fan, Da-Jeng Yao, Cheng-Hsien Liu, Hong-Yuan Huang
  • Patent number: 9719958
    Abstract: A gas sensor controller (100) controls a gas sensor element (10) which has a first pump cell (111), a second pump cell (113), and an oxygen concentration detection cell (112). The controller includes first chamber control means (51) to (53) which pumps oxygen out of or into a first measurement chamber MR1 such that a concentration voltage Vs becomes equal to a target voltage Vr; target voltage changing means S72, S75 which changes the target voltage Vr from a first target voltage Vr1 to a second target voltage Vr2; current detection means (55) which detects the magnitude of a concentration current Ip2 flowing between first electrode (145) and second electrode (147); and deterioration determination means S7 which determines the deterioration state of the gas sensor element from a change which occurs in the concentration current Ip2 due to the change in the target voltage Vr.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: August 1, 2017
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Akihiro Yoshida, Kenji Kato, Koji Shiotani
  • Patent number: 9684007
    Abstract: An automated system and method for processing vessels containing biological samples are presented. The system comprises vessel holders, a transport medium for transporting the vessel holders between the components of the system, a work cell for processing, a storage module for empty vessel holders, wherein the storage module is connected to the transport medium, a robotic manipulator for engaging and/or disengaging the vessels with empty vessel holders, an empty vessel holder transfer unit for introducing empty vessel holders into or retrieving them from the storage module, and an empty vessel holder detection unit, including an empty vessel holder detector for discriminating between filled and empty vessel holders as well as a transfer initiator configured to initiate the introduction or re-introduction of an empty vessel holder detected in or on the transport medium into the storage module by the empty vessel holder transfer unit.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: June 20, 2017
    Assignee: Roche Diagnostics Operations, Inc.
    Inventors: Dietmar Reisch, Gottlieb Schacher
  • Patent number: 9625352
    Abstract: A method of determining an air:fuel ratio based on information from an oxygen sensor exposed to exhaust gases of a combustion process, and related systems. A constant current is supplied to an oxygen sensor that has both an n-type sensing circuit and a p-type sensing circuit that share a common electrode. The currents in the respective sensing circuits is determined and a temperature value representative of a temperature of the oxygen sensor is determined. Then, an air:fuel ratio is determined based on the determined currents and the temperature value. The combustion process may then be controlled based on the air:fuel ratio. The air:fuel ratio may be determined, using the same oxygen sensor, across a range of air:fuel values in both the rich and lean regions; as such, the oxygen sensor may act as a wideband oxygen sensor.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: April 18, 2017
    Assignee: KERDEA TECHNOLOGIES, INC.
    Inventor: Ken Ervin Fosaaen
  • Patent number: 9606040
    Abstract: A sensor controller is applied to a particulate matter detection sensor that includes an attachment portion to which conductive particulate matter contained in gas is attached, and a pair of opposed electrodes spaced from each other at the attachment portion. The particulate matter detection sensor is adapted to output a detection signal corresponding to a resistance between the pair of opposed electrodes, and the sensor controller is adapted to calculate an amount of attached particulate matter based on a sensor detection value from the particulate matter detection sensor. The sensor controller includes a heater for heating the attachment portion so as to burn and remove the particulate matter attached to the attachment portion, and an abnormality diagnosis portion for obtaining the sensor detection value during a heating of the heater and for performing diagnosis of abnormality of the particulate matter detection sensor based on the obtained sensor detection value.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: March 28, 2017
    Assignee: DENSO CORPORATION
    Inventors: Yuuki Sakamoto, Mikiyasu Matsuoka, Yuuzou Matsumoto
  • Patent number: 9562873
    Abstract: A method of testing a system having at least one electrochemical sensor for detecting an analyte gas within a housing of the system, the housing having an inlet, the at least one electrochemical sensor including an electrically active working electrode in fluid connection with the inlet of the system, the method including biasing the electrically active working electrode at a first potential, to detect the analyte gas and biasing the electrically active working electrode at a second potential, different from the first potential, such that the at least one electrochemical sensor is sensitive to a driving force created in the vicinity of the inlet to test at least one transport path of the system. The method may further include creating the driving force in the vicinity of the inlet of the housing of the system and measuring a response of the electrically active working electrode to the driving force.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: February 7, 2017
    Assignee: MSA Technology, LLC
    Inventors: Towner B. Scheffler, Michael A. Brown
  • Patent number: 9529019
    Abstract: An impedance detector includes a current application portion, a detection portion, a calculation portion and a changing portion. The current application portion applies an impedance detection current for detecting an impedance of an element of an oxygen sensor to the element. The detection portion detects a difference between a current application prior voltage and a current application subsequent voltage of the element. The calculation portion calculates the impedance of the element based on the difference detected by the detection portion and a value of the impedance detection current applied by the current application portion. The current application portion can change the value of the impedance detection current applied to the element. The changing portion determines to change the value of the impedance detection current according to the difference detected by the detection portion.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: December 27, 2016
    Assignee: DENSO CORPORATION
    Inventor: Shinya Uemura
  • Patent number: 9493807
    Abstract: The invention disclosed herein includes sensors having three dimensional configurations that allow expansive “360°” sensing (i.e. sensing analyte from multiple directions) in the environments in which such sensors are disposed. Embodiments of the invention provide analyte sensors having foldable substrates adapted to produce optimized configurations of electrode elements as well as methods for making and using such sensors. Typical embodiments of the invention include glucose sensors used in the management of diabetes.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: November 15, 2016
    Assignee: Medtronic Minimed, Inc.
    Inventors: Megan E. Little, Katherine T. Wolfe, Raghavendhar Gautham, Bradley Chi Liang, Rajiv Shah
  • Patent number: 9442090
    Abstract: An ion sensor apparatus comprises at least one ion sensitive field effect transistor (ISFET) device configured to be exposed to a liquid, a reference electrode configured to contact the liquid to which the ISFET device is exposed, and at least one magnet configured to intermittently expose the ISFET device to a magnetic field. A processor is operatively connected to the ISFET device and the reference electrode. The processor modulates the magnetic field to produce a corresponding modulated output in resistance of the ISFET device, and modulation of a reported output value of the ion sensor apparatus.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: September 13, 2016
    Assignee: Honeywell International Inc.
    Inventor: Donald Horkheimer
  • Patent number: 9410922
    Abstract: In a method for adjusting a gas sensor having a hollow chamber connected to a measuring gas chamber and having an electrochemical pump cell electrochemically pumping the gas component into or out of the hollow chamber, at least two pumping-in phases are provided in which the gas component is pumped into the hollow chamber by the electrochemical pump cell, and at least two pumping-out phases are provided in which the gas component is pumped out of the hollow chamber by the electrochemical pump cell. On the basis of at least one feature of the pump current during the pumping-out phases (Mout), at least one piece of information for adjusting the gas sensor is generated. A parameter regarding the pumping-in is predefined differently in the at least two pumping-in phases.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: August 9, 2016
    Assignee: ROBERT BOSCH GMBH
    Inventors: Hartwig Lehle, Lothar Diehl, Jochen Betten, Moritz Waldorf, Thomas Seiler
  • Patent number: 9388728
    Abstract: Systems and methods are disclosed for diagnosing gain rationality of an NOx sensor that is downstream of a selective catalytic reduction (SCR) catalyst. Sensor diagnostics are performed while maintaining reductant dosing to the SCR catalyst.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: July 12, 2016
    Assignee: CUMMINS EMISSION SOLUTIONS, INC.
    Inventors: Archana Chandrasekaran, Xiao Lin
  • Patent number: 9354198
    Abstract: A calibration method for blood glucose of blood sample comprises the following steps: applying a first voltage to a blood sample to obtain an original level of blood glucose of the blood sample; applying a second voltage to a blood sample to obtain a hematocrit index of the blood sample; and processing the hematocrit index and calibrating the original level of blood glucose of the blood sample. The absolute value of the first voltage is lower than 1 volt and is not equal to 0 volt. The absolute value of the second voltage is higher than or equal to 1 volt. A sensing current corresponding to the original blood level and the hematocrit index corresponding to blood sample are obtained by applying at least two-stage voltages in the specific range to the blood sample, thereby calibrating the original blood glucose according to the hematocrit index.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: May 31, 2016
    Assignee: DELBio, Inc.
    Inventors: Po-Chin Nien, Cheng-Chuan Chen, Chien-Yu Yin, Chi-Yan Chen
  • Patent number: 9347907
    Abstract: Internally calibrated pH and other analyte sensors based on redox agents provide more accurate results when the redox active reference agent is in a constant chemical environment, yet separated from the solution being analyzed in such a way as to maintain electrical contact with the sample. Room temperature ionic liquids (RTIL) can be used to achieve these results when used as a salt bridge between the reference material and the sample being analyzed. The RTIL provides the constant chemical environment and ionic strength for the redox active material (RAM) and provides an electrolytic layer that limits or eliminates direct chemical interaction with the sample. A broad range of RAMs can be employed in a variety of configurations in such “Analyte Insensitive Electrode” devices.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: May 24, 2016
    Assignee: Senova Systems, Inc.
    Inventors: Joseph A. Duimstra, Lee Leonard, Gregory G. Wildgoose, Eric Lee
  • Patent number: 9329226
    Abstract: A method and a sensor for ascertaining at least one malfunction of a conductive conductivity sensor having at least two electrodes applying a first electrical variable to the electrodes measuring at least a second electrical variable on the electrodes and deciding whether a malfunction is present based on measuring the second electrical variable. The second electrical variable is located in a first range when measuring the medium when no malfunction is present, and the second electrical variable is located in a second range in the case of a first malfunction, especially when the conductivity sensor is located at least partially outside of the medium, and the second electrical variable is located in a third range when a second malfunction is present, especially an electrode break or a break in a line to the electrodes.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: May 3, 2016
    Assignee: ENDRESS + HAUSER CONDUCTA GESELLSCHAFT FUR MESS- UND REGELTECHNIK MBH + CO. KG
    Inventors: Stefan Paul, Stephan Buschnakowski, Robert Tzschoppe
  • Patent number: 9297741
    Abstract: A sensor device includes first and second electrodes, a coating film and a functional element. The first electrode includes a first metallic material in which either a first passivation film forms on a surface thereof or the first passivation film present on the surface thereof is lost, in association with changes in the pH of a measurement site. The second electrode includes a second metallic material different from the first metallic material, and is spaced apart from the first electrode. The coating film includes a third metallic material different from the first and second metallic materials. The coating film covers at least the first or second electrode. The functional element is configured to measure a difference in electric potential between the first and second electrodes that changes depending on presence or absence of each of the first passivation film and the coating film in association with the changes in pH.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: March 29, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Juri Kato, Takao Miyazawa
  • Patent number: 9234866
    Abstract: A biosensor with an underfill recognition system assesses whether to analyze a sample for one or more analytes in response to the volume of the sample. The underfill recognition system applies polling and test excitation signals to the sample. The polling signals generate one or more polling output signals, which maybe used to detect when a sample is present and to determine whether the sample has sufficient volume for analysis. The test excitation signal generates one or more test output signals, which may be used to determine one or more analyte concentrations in the sample.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: January 12, 2016
    Assignee: Bayer HealthCare LLC
    Inventors: Huan-Ping Wu, Joseph E. Perry, Christine Trippel, Eric Maurer
  • Patent number: 9234860
    Abstract: A probe system, including: a connector apparatus; a treatment chamber part having at least one treatment medium supply line communicating with the treatment chamber; a measuring head seated so as to be axially shiftable, and a treatment position, wherein the immersion tube, on its connector apparatus-side front end, has a front-end closed, protective cylinder, and is arranged in a section of the immersion tube, so that, in the measuring position of the immersion tube, the measuring head is contactable via perforations with the process medium, and in the treatment position of the immersion tube, is contactable with the treatment medium; and a drive system for axial shifting of the immersion tube, arranged on the end region of the probe system facing away from the connector apparatus. The treatment chamber part is surrounded by a support structure connected with the connector apparatus and with the drive system.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: January 12, 2016
    Assignee: Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG
    Inventors: Thomas Pfauch, Ingrid Wunderlich, René Kundscher
  • Patent number: 9125608
    Abstract: A system and method for calibrating a sensor of a characteristic monitoring system in real time utilizes a self-calibration module for periodic determination of, and compensation for, the IR drop across unwanted resistances in a cell. A current-interrupt switch is used to open the self-calibration module circuit and either measure the IR drop using a high-frequency (MHz) ADC module, or estimate it through linear regression of acquired samples of the voltage across the sensor's working and reference electrodes (Vmeasured) over time. The IR drop is then subtracted from the closed-circuit value of Vmeasured to calculate the overpotential that exists in the cell (Vimportant). Vimportant may be further optimized by subtracting the value of the open-circuit voltage (Voc) across the sensor's working and reference electrodes. The values of Vmeasured and Vimportant are then controlled by respective first and second control units to compensate for the IR drop.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: September 8, 2015
    Assignee: MEDTRONIC MINIMED, INC.
    Inventors: Lu Wang, Rajiv Shah, Wayne A. Morgan, Barry Keenan
  • Patent number: 9125607
    Abstract: A system and method for calibrating a sensor of a characteristic monitoring system in real time utilizes a self-calibration module for periodic determination of, and compensation for, the IR drop across unwanted resistances in a cell. A current-interrupt switch is used to open the self-calibration module circuit and either measure the IR drop using a high-frequency (MHz) ADC module, or estimate it through linear regression of acquired samples of the voltage across the sensor's working and reference electrodes (Vmeasured) over time. The IR drop is then subtracted from the closed-circuit value of Vmeasured to calculate the overpotential that exists in the cell (Vimportant). Vimportant may be further optimized by subtracting the value of the open-circuit voltage (Voc) across the sensor's working and reference electrodes. The values of Vmeasured and Vimportant are then controlled by respective first and second control units to compensate for the IR drop.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: September 8, 2015
    Assignee: MEDTRONIC MINIMED, INC.
    Inventors: Lu Wang, Rajiv Shah, Wayne A. Morgan, Barry Keenan
  • Patent number: 9086372
    Abstract: A biosensor includes a working electrode 101, a counter electrode 102 opposing the working electrode 101, a working electrode terminal 103 and a working electrode reference terminal 10 connected to the working electrode 101 by wires, and a counter electrode terminal 104 connected to the counter electrode 102 by a wire. By employing a structure with at least three electrodes, it is possible to assay a target substance without being influenced by the line resistance on the working electrode side.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: July 21, 2015
    Assignee: PANASONIC HEALTHCARE HOLDINGS CO., LTD.
    Inventors: Hiroya Ueno, Junji Nakatsuka
  • Patent number: 9080955
    Abstract: A biosensor includes a working electrode 101, a counter electrode 102 opposing the working electrode 101, a working electrode terminal 103 and a working electrode reference terminal 10 connected to the working electrode 101 by wires, and a counter electrode terminal 104 connected to the counter electrode 102 by a wire. By employing a structure with at least three electrodes, it is possible to assay a target substance without being influenced by the line resistance on the working electrode side.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: July 14, 2015
    Assignee: Panasonic Healthcare Holdings Co., Ltd.
    Inventors: Hiroya Ueno, Junji Nakatsuka
  • Patent number: 9052282
    Abstract: A water analysis measurement arrangement for determining a concentration of ions and/or ionic compounds in an aqueous medium includes a closed buffer solution housing comprising a pH buffer solution. The closed buffer solution housing is configured to communicate with the aqueous medium via an electrolyte bridge. A reference electrode is arranged in the closed buffer solution housing. An amplifier ground is disposed on a ground electrode and is configured to directly contact the aqueous medium. A high-impedance amplifier comprises a first capacitive element arranged between the reference electrode and the amplifier ground. An AC voltage generator is arranged between the amplifier ground and the ground electrode. A measurement electrode is configured to directly contact the aqueous medium.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: June 9, 2015
    Assignee: HACH LANGE GMBH
    Inventors: Michael Kussmann, Lothar Heidemanns, Andreas Jonak, Markus Hahn, Heinz Rudde, Claudia Rieger, Axel Leyer
  • Publication number: 20150144508
    Abstract: A biosensor has an underfill detection system that determines whether a sample of a biological fluid is large enough for an analysis of one or more analytes. The underfill detection system applies an excitation signal to the sample, which generates an output signal in response to the excitation signal. The underfill detection system switches the amplitude of the excitation signal. The transition of the excitation signal to a different amplitude changes the output signal when the sample is not large enough for an accurate and/or precise analysis. The underfill detection system measures and compares the output signal with one or more underfill thresholds to determine whether an underfill condition exists.
    Type: Application
    Filed: February 2, 2015
    Publication date: May 28, 2015
    Inventors: Huan-Ping Wu, Christine D. Nelson
  • Publication number: 20150101928
    Abstract: Methods of determining a corrected analyte concentration in view of some error source are provided herein. The methods can be utilized for the determination of various analytes and/or various sources of error. In one example, the method can be configured to determine a corrected glucose concentration in view of an extreme level of hematocrit found within the sample. In other embodiments, methods are provided for identifying various system errors and/or defects. For example, such errors can include partial-fill or double-fill situations, high track resistance, and/or sample leakage. Systems are also provided for determining a corrected analyte concentration and/or detecting some system error.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 16, 2015
    Inventors: Ronald C. Chatelier, Alastair M. Hodges, Santhanagopalan Nandagopalan
  • Publication number: 20150083588
    Abstract: A gas concentration detector includes a gas sensor and an abnormality detecting section. The gas sensor includes a single solid electrolyte body having oxygen ion conductivity and electrodes formed on both surfaces of the single solid electrolyte body. The abnormality detecting section is configured to apply an AC voltage to a specific one of the electrodes and concurrently measure currents flowing respectively between the specific electrode and each of the other electrodes through the solid electrolyte body, and determine that at least one of wires respectively connected to the corresponding electrodes is broken if at least one of the measured currents is smaller than a predetermined value.
    Type: Application
    Filed: September 24, 2014
    Publication date: March 26, 2015
    Inventor: Yu MURATA
  • Publication number: 20150068920
    Abstract: Described and illustrated herein are one exemplary method and a measurement system having a meter and a test strip. The test strip has a first working electrode, reference electrode and second working electrode. In this method, acceptable fill data from known first current and known second current are used to predict an estimated second current at proximate the second time period (for a given batch of test strips) during the test sequence. The estimated second current at proximate the second time interval is then compared with a measured actual second current at proximate the second time interval during an actual test to determine if the measured actual second current is substantially equal to or within an acceptable percent deviation from the estimated second current so as to determine sufficient volume of a physiological fluid sample in the test strip.
    Type: Application
    Filed: November 18, 2014
    Publication date: March 12, 2015
    Inventors: James Iain RODGERS, Leanne MILLS, Marco F. CARDOSI, Christopher Philip LEACH, James MOFFAT
  • Publication number: 20150068923
    Abstract: The disclosure is directed to biosensor monitors, test strips and activation mechanisms and methods thereof. The biosensor monitor is for verifying a test strip to be used with the biosensor monitor. The monitor includes verification components located within the monitor and accessible to a test strip to be inserted into the biosensor monitor. The verification components interact with verification portions of the test strip to allow the biosensor monitor to verify the test strip before the biosensor monitor tests biological material on the test strip. A test strip and methods are also described.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 12, 2015
    Inventors: JEN-FANG LEE, KUAN-CHIH HUANG
  • Patent number: 8961763
    Abstract: Provided is a device comprising an upper chamber, a middle chamber and a lower chamber, wherein the upper chamber is in communication with the middle chamber through a first pore, and the middle chamber is in communication with the lower chamber through a second pore, wherein the first pore and second pore are about 1 nm to about 100 nm in diameter, and are about 10 nm to about 1000 nm apart from each other, and wherein each of the chambers comprises an electrode for connecting to a power supply. Methods of using the device are also provided, in particular for sequencing a polynucleotide.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: February 24, 2015
    Assignee: The Regents of the University of California
    Inventors: William Dunbar, Jungsuk Kim
  • Publication number: 20140262772
    Abstract: The present disclosure relates to an electrochemical test sensor for detecting the concentration of an analyte in a fluid sample. The test sensor includes a working electrode, a counter electrode, and a trigger electrode. A temporary protective layer overlies the trigger electrode and helps to maintain the function of the trigger electrode during test sensor manufacture.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: BAYER HEALTHCARE LLC
    Inventors: Andrew Edelbrock, Steven C. Charlton
  • Patent number: 8834690
    Abstract: An analyte test sensor for use in measuring the concentration of a particular analyte in a test sample includes a non-conductive substrate, a reference electrode deposited on the substrate, a working electrode deposited on the substrate and a compensation electrode deposited on the substrate. The compensation electrode is provided with a resistive ladder and is designed to correct for test result inaccuracies which are the result of variances in the manufacturing of the test sensor. Specifically, in one embodiment, the compensation electrode corrects for test result inaccuracies in an analog manner by shunting a portion of the working current away from working electrode. In another embodiment, the compensation electrode corrects for test result inaccuracies in a digital manner by providing a calibration code which is proportional its resistance value. A batch of analyte test sensors are preferably manufactured in the following manner. An initial batch of the test sensors is constructed.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: September 16, 2014
    Assignee: Abbott Laboratories
    Inventors: Alexander G. Ghesquiere, Simon Tonks
  • Publication number: 20140251833
    Abstract: Various embodiments for methods and systems that allow for detecting of a direction in which a sample is flowing towards a plurality of electrodes and detecting a fill error of an electrochemical test strip.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 11, 2014
    Applicant: LifeScan Scotland Limited
    Inventors: Antony SMITH, Neil Whitehead, Lynsey Whyte
  • Publication number: 20140238853
    Abstract: A gas sensor control apparatus for controlling a gas sensor element, the gas sensor element including first and second measuring chambers and the gas sensor control apparatus including first chamber control unit for controlling an oxygen concentration in the first chamber; second chamber control unit for applying a second chamber pump voltage to disassociate an oxygen-containing specific gas contained in the second chamber and thereby generate a concentration-dependent current; current detecting unit; voltage changing unit for changing the second chamber pump voltage; and deterioration determination unit for determining the deterioration state of the gas sensor element based on a transient response of the concentration-dependent current.
    Type: Application
    Filed: February 25, 2014
    Publication date: August 28, 2014
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Akihiro YOSHIDA, Kenji KATO, Koji SHIOTANI
  • Publication number: 20140183060
    Abstract: A method for diagnosing an electrical lead to an electrode of a sensor element, for sensing at least one property of a measured gas in a measured gas space, in particular for sensing a proportion of a gas component in the measured gas or a temperature of the measured gas, is described. A measured signal indicating an internal resistance of a pump cell of the sensor element is investigated for regularity upon switching on of the control unit. Upon identification of at least one irregularity of the measured signal, a suspected fault in the lead is identified and at least one substitute action is taken. The substitute action is selected from: an application of control to the heating element which is provided for a fault situation, a check of the validity of the measured signal, and a monitoring of the heating element. A sensor apparatus is also described.
    Type: Application
    Filed: December 24, 2013
    Publication date: July 3, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventors: Richard HOLBERG, Albrecht SCHMIDT, Christoph HAGNER
  • Patent number: 8652312
    Abstract: An apparatus and method for monitoring cathodic protection of a protected object that includes a probe with five segments in series. The cathodic protection is provided by a system with a power supply that impresses current onto the protected object. An anode is included with the system that is also connected to the power supply. The third and fifth segments are in electrical communication through a frangible connection; that over time galvanically corrodes to electrically isolate the third and fifth segments. The second segment, which is a permanent isolator, is set between the first and third segments. The third segment is selectively connected with the protected object. When the third segment is selectively disconnected from the protected object, measuring the potential difference between the third segment and the first segment yields a value for object polarization that is void of IR error.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: February 18, 2014
    Assignee: Saudi Arabian Oil Company
    Inventor: Darrell Raymond Catte