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| Number | Title | Issue Date |
| 8061194 | Fluid flow monitoring To provide an indication of whether airflow is separated, as opposed to other states of flow, over a surface, two or more adjacent sensors at a location on the surface each produce an analogue signal representative of airflow. The analogue signals are correlated wit... | 11/22/2011 |
| 7882735 | Thermal air flowmeter An object of the invention is to provide a thermal air flowmeter which can reduce a detection error occurring during pulsating air flow due to a difference of response between rising and falling of detected flow or due to air flow dependence of response. A thermal a... | 02/08/2011 |
| 7861585 | Flowmeter A flowmeter includes a flow sensor capable of measuring instantaneous flow rates of forward and backward flows of a fluid, smoothing means for smoothing the measured instantaneous flow rate, an integrating counter for integrating the smoothed flow rate and outputtin... | 01/04/2011 |
| 7726186 | Airflow sensor for filter blockage detection A thermal management system includes an airflow sensor that measures airflow in an air path inside an enclosure to be cooled, wherein the air path includes a filter and a fan. A controller is responsive to the airflow sensor for monitoring the rate of airflow inside... | 06/01/2010 |
| 7469583 | Flow sensor A flow sensor readily obtains high sensitivity without errors due to tilting. The flow sensor includes a flow channel having a pair of parallel portions and temperature sensing resistors for heating a fluid to a preset temperature. The temperature sensing resistors ... | 12/30/2008 |
| 7418859 | Device for measuring a volume flow with inductive coupling A device for measuring a volume flow, especially a tidal volume flow sensor, with a flow channel (1) and with a sensor element (6) arranged within the flow channel (1), is shown and described. The task of providing such a device, in which the se... | 09/02/2008 |
| 7408133 | Method of thermally coupling a flow tube or like component to a thermal sensor and sensor systems formed thereby A method of thermally coupling a flow tube or like component to a thermal sensor comprises bonding the component to the thermal sensor such that thermally conductive portions formed on the component are thermally coupled to corresponding sensing/heating elements dis... | 08/05/2008 |
| 7347092 | Apparatus and method for fluid flow measurement An apparatus and method for fluid flow measurement are provided. The apparatus includes a first thermistor; a second thermistor; a first deflecting member configured to shield the first thermistor from fluid flowing in a first direction; a second deflecting member c... | 03/25/2008 |
| 7303935 | High temperature microelectromechanical (MEM) devices and fabrication method A microelectromechanical (MEM) device per the present invention comprises a semiconductor wafer—typically an SOI wafer, a substrate, and a high temperature bond which bonds the wafer to the substrate to form a composite structure. Portions of the composite structu... | 12/04/2007 |
| 7281423 | Characteristics adjusting apparatus of physical quantity sensing device and a thermal type air flow measuring instrument, and associated adjusting method The output characteristics of the sensing device or the control quantity of the sensing element can be adjusted by extracting an adjusting terminal in addition to a power source terminal, a ground terminal, an output terminal and the like outside a housing containin... | 10/16/2007 |
| 7270000 | Fluid flow sensor and fluid flow measurement device A Thermal type fluid flow sensor comprises a heating resistor formed on a thin film of a substrate, and plural thermal sensitive resistors configuring a bridge circuit. The thermal sensitive resistors are disposed on the thin film of the substrate so as to be locate... | 09/18/2007 |
| 7243035 | System and method for mass flow detection device calibration Systems and methods for correcting measurements of fluid flow using device-specific information to compensate for differences between individual devices of the same design. In one embodiment, a method includes providing device-specific calibration data; sensing a fl... | 07/10/2007 |
| 7224256 | Stable high temperature heater with serpentine heating strands on insulative substrate A sensor system has an AlN substrate, a W layer on the substrate, a signal source adapted to apply an electrical actuating signal to the W layer, and a sensor adapted to sense the response of the W layer. The W layer can comprise a thin film, with various types of o... | 05/29/2007 |
| 7213455 | Thermal type gas flow measuring instrument A thermal type gas flow measuring instrument measures gas flow with high precision by accurately correcting changes in radiation heat characteristics of a heating resistor due to contamination. The instrument comprises a second heating resistor 30 whose resis... | 05/08/2007 |
| 7215021 | Electronic device The conductor wire surface for constituting a circuit formed by print or junction on a substrate formed from a composite member of ceramics, resin, and an inorganic member and from a resin member is coated with glass, resin, solder, or silver paste, thus the corrosi... | 05/08/2007 |
| 7210194 | Airflow sensor system for monitoring air inlet airflow and air outlet airflow of a vacuum cleaner An airflow sensor system for monitoring air inlet airflow and air outlet airflow of a vacuum cleaner is provided according to an embodiment of the invention. The airflow sensor system includes a vacuum cleaner air duct, a bypass tube connected to the air duct, and a... | 05/01/2007 |
| 7205781 | Mass air flow circuit having pulse width modulation feedback control A circuit for measuring the mass air flow rate through a duct is disclosed. The circuit includes a bridge circuit, a first amplifier, an oscillator, a comparator and a switch. The bridge circuit has a plurality of resistors arranged to output first and second bridge... | 04/17/2007 |
| 7201049 | Pulsed thermistor sensor A thermistor is pulsed with energy, and a time constant of decay of temperature is calculated based on measured resistance of the thermistor over a number of known intervals. The time constant is representative of the mass air flow. The ambient air temperature may b... | 04/10/2007 |
| 7191645 | Dynamic mixed gas flowmeter A compensated flowmeter having a probe adapted to project into flowing media within a conduit. The probe includes a thermal dispersion sensor, and a compensating gas properties sensor contained within a no-flow chamber of the probe. The thermal flow sensor has activ... | 03/20/2007 |
| 7192187 | In-line thermometer An improved temperature measuring device for the in-line temperature measurement of fluids which does not require intimate contact of the fluid with the temperature sensing element. In addition, the invention contains no internal cavities or crevices making it very ... | 03/20/2007 |
| 7162374 | Device for the determination of flow parameters for a fluid and method for operating such a device A device for determining flow parameters, particularly the temperature and flow speed and changes therein, in a fluid flow for monitoring and a fire recognition or oxygen measuring device provided with such a device are provided. A slow or sudden blockage, crack or ... | 01/09/2007 |
| 7120542 | Flow monitoring system A flow monitoring system includes a first temperature-sensitive resistive device, thermally coupled to a first portion of a fluid transfer apparatus, for producing a first temperature-dependant voltage signal representative of the temperature of the fluid within the... | 10/10/2006 |
| 7106167 | Stable high temperature sensor system with tungsten on AlN A sensor system has an AlN substrate, a W layer on the substrate, a signal source adapted to apply an electrical actuating signal to the W layer, and a sensor adapted to sense the response of the W layer. The W layer can comprise a thin film, with various types of o... | 09/12/2006 |
| 7084778 | Ammonia flow alarm and method therefor A sensor system for monitoring cryogenic gas flow through a tube/pipe has at least one sensor coupled to the tube/piping. An alarm circuit is coupled to the sensor for receiving measurement signals from the at least one sensor and for sending an alarm signal when th... | 08/01/2006 |
| 7084378 | Mass-flow sensor heating element protection method and apparatus A heating element protection apparatus for a mass-flow sensor may include a heating element disposed in a gas, a gas temperature sensor disposed in the gas to sense a temperature of the gas, a slope detector to measure a slope of the temperature as power is supplied... | 08/01/2006 |
| 7055366 | Flow sensor calibration methods and apparatus Apparatus and methods of calibrating a microfluidic flow sensor, in which the flow of a fluid through a flow sensor is stopped and a first value is read from the flow sensor, then the fluid is pumped through the flow sensor sequentially at first and second selected ... | 06/06/2006 |
| 7054767 | Thermal mass flowmeter apparatus and method with temperature correction A thermal mass flowmeter with temperature correction. The flowmeter includes a bridge, a signal conditioner, and a balancer. The balancer provides a bridge signal as feedback to the bridge that balances a flow sensor signal and the temperature sensor signal from the... | 05/30/2006 |
| 7049875 | One-pin automatic tuning of MOSFET resistors Methods and apparatus for automatic tuning of MOSFET resistors providing accuracy and linearity throughout process and temperature variations. In accordance with the methods, the source and drain of a MOSFET device are biased in a balanced manner around a common mod... | 05/23/2006 |
| 7042330 | Low resistance value resistor The low resistance value resistor 11 has two electrodes 12,13 of metal strips having a high electrical conductivity. The metal strips are affixed on the resistor body by means of rolling and/or thermal diffusion bonding. A fused solder layer is formed ... | 05/09/2006 |
| 7036368 | Heating resistor type air flow rate measuring apparatus A heating resistor type air flow rate measuring apparatus is provided with a couple of heating resistors placed at the positions where those resistors may each interfere thermally with respect to an air flow, and a couple of driving circuits for driving those heatin... | 05/02/2006 |
| 6983653 | Flow sensor having thin film portion and method for manufacturing the same A flow sensor for detecting flow of fluid includes a thin film portion. The thin film portion has a heater and a detector for detecting temperature around the heater. The heater is made of semiconductor. This flow sensor has high sensor sensitivity with low energy c... | 01/10/2006 |
| 6925873 | Liquid helium level sensor for use in a cryogenic environment and method for assembling same The present invention provides a method and apparatus for measuring the level of a liquid cryogen. The invention provides for use of a current source (52), a length, or multiple lengths, of superconducting filament (40) situated within a cryostat (1... | 08/09/2005 |
| 6911894 | Sensor package for harsh environments A sensor can be configured to generally include a flow channel block having a flow channel formed therein, and a sensor chip for sensing fluid flow, wherein a fluid in the flow channel surrounds the sensor chip. Alternatively, the sensor chip can be fastened at one ... | 06/28/2005 |
| 6904793 | Air flow meter An air flow meter which can decrease the error due to the backflow. Throttle valve 17 which opens and shuts the air intake passage is installed in the air intake passage of the internal combustion engine. The first sensor part 161 is installed in the a... | 06/14/2005 |
| 6886402 | Gas flow rate and temperature measuring element Gas temperature detection wiring is provided with a first wiring portion disposed parallel to and in close proximity to a flow rate detector portion for a length substantially equivalent to a length of the flow rate detector portion; and a second wiring portion disp... | 05/03/2005 |
| 6794981 | Integratable-fluid flow and property microsensor assembly An integratable fluid flow and property microsensor assembly is configured to be operably embedded in a microfluidic cartridge of the type used in lab-on-a-chip systems. The assembly is a robust package having a microstructure flow sensor contained within a housing ... | 09/21/2004 |
| 6732583 | Sensor element and its manufacturing method The present invention provides a sensor element having a sensor substrate and a sensing portion supported by the sensor substrate. A resin film is provided between the sensor substrate and the sensing portion. The resin film has a high heat resistance to the tempera... | 05/11/2004 |
| 6725166 | Flow pickup circuit A flow pickup circuit for receiving a flow signal from a flow sensor and providing a flow indicator signal corresponding to flow characteristics through the flow sensor includes an inner bridge circuit, an outer bridge circuit, and a processor. The inner bridge circ... | 04/20/2004 |
| 6701781 | Mass air flow sensor bypass housing A mass air flow sensor 10 including a housing 14, an air foil element 16, and at least one sensor element 22 mounted on the surface of the air foil element 16, whereby disruption to the air flow is minimized and performance of the mass air flow sensor 10 ... | 03/09/2004 |
| 6639506 | Method and apparatus for sensing and measuring plural physical properties, including temperature A method and device, employing positive-temperature-coefficient material, for sensing plural properties of a fluid, such as temperature and flow rate. Can be used in a wind gauge or in a device for sensing position of mechanical elements such as valve dia... | 10/28/2003 |
