| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073204230 |
Having particular electrical heating, cooling, or thermal sensing element
| 131 |
| 073204220 |
With sensor housing
| 24 |
| 073204150 |
Including detail of feedback or rebalancing circuitry
| 8 |
| 073204180 |
Including response characteristic or condition compensation
| 7 |
| 073204210 |
With fluid flow deflector or restrictor (e.g., baffle, constriction) | 5 |
| 20130139584 | FLOW SENSOR ASSEMBLY - A flow sensor assembly that may include features that help prevent moisture from reaching a sensor die of the flow sensor assembly. In some cases, such features may include a bypass channel that is configured to reverse the direction of the flow of fluid at least once upstream of the sensor die. In some cases, an encapsulant may cover one or more bond pads of the sensor die. In some cases, an output of the flow sensor assembly may be a raw sensor output signal produced by the one or more sensor elements of the sensor die, without significant processing of the raw sensor signal. | 06-06-2013 |
| 20140165718 | FLOW SENSOR ASSEMBLY HAVING A HYBRID SENSOR RESPONSE PROCESABLE TO PROVIDE A VOLUMETRIC FLOW MEASUREMENT OVER A WIDE DYNAMIC RANGE - A flow sensor system including a flow sensor assembly is provided. The sensor assembly may be configured to allow fluid flow through a flow conduit. A flow disrupter may be disposed in the flow conduit to impart disturbances to the fluid flow. A by-pass channel may be in fluid connection with the flow conduit and may be arranged to have a geometrical relationship relative to the flow conduit and the flow disrupter to affect flow characteristics in the bypass channel. One or more sensors may be disposed in the by-pass channel to generate a signal responsive to the flow characteristics in the bypass channel. In a first flow regime, the flow characteristics in the bypass channel may effect an amplitude response of the sensor, and in a second flow regime, the flow characteristics may effect a temporal response of the sensor. | 06-19-2014 |
| 20150292928 | Sensor and Flow Measuring Device - A sensor of a thermal flow measuring device, as well as the flow measuring device itself. The sensor comprises a sensor platform, which bears at least one measuring sensor element and a heated sensor element. Each of the at least two sensor elements is surrounded by a metal sleeve, which protrudes from the sensor platform. The sensor has a plate-shaped element, which defines a plane, whose axis extends parallel to the axis of at least one of the metal sleeves, wherein the plane is spaced from the sensor platform in the axial direction of the metal sleeve. The metal sleeve with the heated sensor element has a terminal end face and the plate-shaped element is provided along the end face of the metal sleeve with the heated sensor element for flow guidance. At least 50% of the heating power required for the heated sensor element is given off as heat energy via the metal sleeve to a medium in a region, which is formed by the terminal end face and a sleeve wall section, which starting from the end face lies in the first third of the metal sleeve. | 10-15-2015 |
| 20150355006 | Thermal Flow Meter - It is an object of the present invention to improve a measurement accuracy of a thermal flow meter. A circuit package | 12-10-2015 |
| 20160161314 | FLOW SENSOR PACKAGE - A flow sensor package comprises a chip comprising a sensitive structure for sensing the flow of a fluid and an encapsulation at least partly encapsulating the chip. A recess in the encapsulation contributes to a flow channel for guiding the fluid, which recess exposes at least the sensitive structure of the chip from the encapsulation, and which recess extends beyond an edge of the chip. | 06-09-2016 |
| 073204170 |
With distinct heating circuitry for a self-heated sensor | 5 |
| 20080210001 | Device with flow sensor for handling fluids - A channel substrate containing at least one channel for a fluid is provided. A sensor substrate carrying a thermal flow sensor is arranged adjacent to the channel substrate. The flow sensor contains at least one temperature sensor and at least one heater, which are integrated on the sensor substrate. The heater and the temperature sensor are in thermal contact with the channel in the channel substrate. This arrangement allows to measure the flow of the fluid in the channel, which provides an improved monitoring and control. The sensor substrate can have contact pads connected to bond wires or, using flip-chip technology, the contact pads can be connected to circuit paths to the channel substrate. | 09-04-2008 |
| 20080236273 | Mass airflow sensing system including resistive temperature sensors and a heating element - A mass airflow sensor is disclosed that includes a heating element comprising an upstream side and a downstream side. Two resistive temperature sensors are placed on each side of the heating element and assuming mass air/liquid flows in a direction from left to right. The resistors are configured electrically in a Wheatstone bridge configuration. A regulated voltage is applied across the mass flow sensing, Wheatstone bridge. The regulated voltage is set high enough to produce self-heating effects on the sensing bridge. The central heating element will also be heated. As mass air/liquid flows across the temperature sensors and the heating element, the upstream (RU | 10-02-2008 |
| 20130098150 | FLOW-METER PROBE - The invention provides a probe for a flowmeter which can be employed in various flow measuring devices utilizing semiconductor or ceramic thermistors. The invention comprises an apparatus for determining the fluid flow rate of a liquid passing through a conduit made of a material having a low thermal conductivity, comprising a probe disposed at least partially inside the wall of the conduit, part of the probe being substantially aligned with an inner surface of the wall, the probe being operationally connected to a control and display unit. The probe comprising a printed circuit board (PCB) on which at least two thermistors are mounted; an upstream thermistor serving for baseline measurements and a spaced apart downstream self-heated thermistor. The control and display unit repeatedly measuring the electrical resistance of the thermistors to generate signals which are electronically processed by the control and display unit to indicate flow rates. | 04-25-2013 |
| 20140157887 | Miniaturised Sensor Comprising A Heating Element, And Associated Production Method - The invention relates to a miniaturised sensor having a heating element, and to an associated production method. The sensor includes a substrate, a cavity and a heat-insulating structure suspended above the cavity by areas connecting to the substrate. The heat-insulating structure includes at least two bridges extending above the cavity, the heating element being supported by said bridges, extending transversely thereto. | 06-12-2014 |
| 20140283595 | MICROMACHINED MASS FLOW SENSOR WITH CONDENSATION PREVENTION AND METHOD OF MAKING THE SAME - The design and manufacture method of a silicon mass flow sensor made with silicon Micromachining MEMS, Micro Electro Mechanical Systems) process for applications of gas flow measurement with highly humidified or liquid vapors is disclosed in the present invention. The said silicon mass flow sensor operates with an embedded heater and an adjacent control temperature sensor beneath the integrated calorimetric and thermal dissipative sensing thermistors. When the condensation takes place at the surface of the said silicon mass flow sensor, the embedded heater shall be turned on to elevate the temperature of the supporting membrane or substrate for the sensing thermistors. The elevated temperature shall be adjusted to above the vaporization temperature with the feedback data of the adjacent temperature sensor such that the surface condensation due to the presence of the liquid vapors in a gas flow can be effectively eliminated. | 09-25-2014 |
| 073204140 |
Including digital or pulse measuring circuitry | 5 |
| 20090025473 | Flow Rate Detection Method and Flow Rate Detection Apparatus Using a Heat Signal - A flow rate detection method using a heat signal that enables accurate flow rate measurement by eliminating sources of measurement error is provided. The flow rate detection method, using a heat signal, of writing a temperature-change heat signal in a medium traveling through a channel and detecting the heat signal with heat signal detecting means provided at a position away from the writing position, to measure a traveling speed of the medium, wherein first and second temperature sensors | 01-29-2009 |
| 20120111105 | Mass Air Flow Sensor - A digitally based resistance element and a processor are used with a hotwire to provide a mass airflow (MAF) sensor. A temperature sensor can provide an input to the processor which can provide signals to the digital based resistance element. The digital based resistance element may be on a first leg of a Wheatstone bridge, the hotwire on a second leg. The output of the hotwire may be provided to the processor which can modify the output such as to more closely approximate a MAF curve, and/or to address step changes initiated by the digital based resistive element. | 05-10-2012 |
| 20130118250 | CALORIMETRIC FLOW METER HAVING HIGH HEAT CONDUCTIVITY STRIPS - A flow meter includes a heater for heating a fluid flow along a membrane. A temperature difference is measured between and upstream point and a downstream point. There are additionally provided one or more strips of material having a relatively high heat conductivity. Strips that are substantially perpendicular to the flow direction direct heat from the heater to the sides of the membrane, causing a large proportion of the heat that would otherwise drive heat flows to be dispersed and decreases inaccuracies or bias in the measured flow rate. Strips of material that are provided parallel to the flow direction act to direct heat from the heater along the direction of flow. This increases the proportion of heat that flows along this axis and guides the flow and hence reduces the proportion of heat available to drive heat flows that cause inaccuracies and bias in the measured flow rates. | 05-16-2013 |
| 20130125643 | Thermal Pulse Flow Meter - An apparatus and method are disclosed for using a thermally active device as a flow meter. The flow meter may have an extremely low mass, rapid response time, and use minimal energy. The flow meter may be located near a flow-side surface of a conduit wall, flush with the surface of a wall, or within a boundary layer of a flow in a conduit. In these locations, the device may present virtually no obstruction to the flow. In certain embodiments, the device may use a resistance temperature device (RTD) heated by a known current, and then tested for resistance at a comparatively much lower (nominally zero) value. A flow rate may be calculated as a function of temperature measurements taken at different steady-state conditions. Flow rates may be so measured at any desired frequency, including very infrequently, such as seconds, minutes, or days apart. | 05-23-2013 |
| 20160025540 | FLOW SENSOR CIRCUIT FOR MONITORING A FLUID FLOWPATH - A flow sensor circuit for a fluid flowpath having a self-heated thermistor situated in a fluid flowpath. The flow sensor circuit is configured to energize the thermistor sufficiently to heat the thermistor, calculate the slope of the leading edge of the rise in temperature of the thermistor when the thermistor is energized, and equate the slope to the state of the fluid flowing through the fluid flowpath. In another embodiment, the flow sensor circuit is configured to energize the thermistor, measure and calculate the average and standard deviation of the thermistor temperature, and determine the state of the flowpath using the thermistor temperature average and standard deviation. | 01-28-2016 |
| 073204130 |
With auxiliary fluid contacting or in heat exchange relation with flow path (e.g., thermodilution) | 3 |
| 20120304760 | APPARATUS AND METHOD OF MONITORING FLOW OF LIQUID IN PIPE - An apparatus and method for monitoring a flow of liquid in a pipe are provided. The apparatus may include a temperature sensor attached to a pipe of a heat exchanger system to measure a temperature of the pipe, and a controller to determine whether a liquid is present in the pipe, based on a change in the measured temperature. | 12-06-2012 |
| 20150135823 | Thermal Flow Meter - To obtain a thermal flow meter capable of providing thermal insulation without degrading responsiveness of a temperature detection element. A thermal flow meter | 05-21-2015 |
| 20150135824 | Thermal Flow Meter - The present invention aims to provide a thermal flow meter capable of avoiding pollutants guided to an outer circumference side of the bypass passage by virtue of a centrifugal force or particle or liquid pollutants that are not centrifugally separated from reaching a heat transfer surface of an air flow sensing portion and obtaining high measurement accuracy. In the thermal flow meter of the present invention, the bypass passage has an upstream side curved path | 05-21-2015 |
| Entries |
| Document | Title | Date |
|---|
| 20080196493 | Flowmeter and flow control device - A simply structured flowmeter in which an influence of a dilatational wave on a thermal flow rate sensor is suppressed, and measurement accuracy is enhanced. | 08-21-2008 |
| 20080289410 | Thermal Mass Flow Meter - The disclosure relates to a thermal mass flow meter for determining a material flow through a vessel. In this case, a heating element is mounted on a holder which is immersed into a vessel with a flowing medium. It is suggested that the holder is subdivided into two zones of differing thermal conductivity, the holder substantially having a high thermal conductivity adjoined by a short zone of low thermal conductivity in which the heating element is arranged. | 11-27-2008 |
| 20080289411 | Thermal mass flow meter and method for its operation - The disclosure relates to a thermal mass flow meter for determining a material flow through a vessel. The mass flow meter has at least two measuring elements immersed into a vessel with a flowing medium, with one of the measuring elements being heated. It is proposed that the heated measuring element is arranged in front of the unheated measuring element in the flow direction of the medium for at least part of the time, and for part of the time the unheated measuring element is arranged in front of the heated measuring element. | 11-27-2008 |
| 20080289412 | Thermal mass flow meter and method for its operation - A thermal mass flow meter is disclosed for determining a material flow through a vessel. In this case, a sensor arrangement is mounted on a holder immersed into a vessel with a flowing medium. It is proposed that the sensor arrangement comprises a first and a second measuring element, with one of the respective measuring elements being heated while the other respective measuring element is not heated and that the two measuring elements can be heated alternately. | 11-27-2008 |
| 20080307879 | Method for Control of a Thermal/Calorimetric Flow Measuring Device - A method for control of a thermal, or calorimetric, flow measuring device, which ascertains and/or monitors, by means of two temperature sensors, the flow of a measured medium through a pipeline or measuring tube in a process, wherein the current temperature (T | 12-18-2008 |
| 20090193887 | Temperature-Measuring Device - A temperature-measuring device with a sensing head and a pipe piece is disclosed. The sensing head is embedded in the pipe piece. The pipe piece is provided for conducting a medium whose temperature is detected by the sensing head. | 08-06-2009 |
| 20090255332 | THERMAL INSPECTION SYSTEM AND METHOD - A thermal inspection method is provided for a component comprising at least one complex internal passage arrangement defining at least one opening. The thermal inspection method includes flowing a fluid through the at least one complex internal passage arrangement. The fluid has an initial temperature that differs from an initial temperature of the component. The thermal inspection method further includes measuring a thermal response of the component to the fluid flow and analyzing the thermal response to determine a number of heat transfer coefficients {h | 10-15-2009 |
| 20100037688 | FLOWMETER - Provided is a flowmeter which performs stable large flow volume measurement with improved linearity without increasing sizes of the entire apparatus. The flowmeter is provided with a flow tube ( | 02-18-2010 |
| 20100064799 | PLUG-IN SENSOR HAVING IMPROVED FLUID MECHANICS - A plug-in sensor for determining an aspirated air mass of an internal combustion engine flowing through a flow pipe has a plug part, which is able to be introduced into the streaming medium with a specified orientation to the main flow direction. Provided in this plug part is at least one flow channel having at least one inlet opening and at least one outlet opening. Accommodated in the at least one flow channel is at least one sensor for determining the at least one parameter. The plug part has a rounded inflow side, which points counter to the main flow direction. The plug part at least partially has an airfoil profile, which is designed such that an asymmetrical flow profile of the fluid medium comes about when the plug part is introduced into the streaming fluid medium. | 03-18-2010 |
| 20100089145 | DEVICE AND METHOD FOR MEASURING THE FLOW SPEED AND DIRECTION OF A GASEOUS FLUID - A device for measuring the flow speed of a fluid as well as its direction and its orientation, based on a thermal-sensor measurement principle, that comprises at least three flow measurement probes each having a sensitive member and an obstacle masking a predetermined measurement area of the sensor, characterized in that the flow measurement probes are attached on carrier posts, the carrier posts defining the obstacles that form masking members for an angular sector of the flow measurement probes facing the sensitive member of the probes. | 04-15-2010 |
| 20100107755 | CALORIMETRIC FLOW METER - A flow meter | 05-06-2010 |
| 20100116048 | Thermal Flow Meter - A thermal flow meter for use in dialysis is described, that uses a thermal wave to generate a signal in the fluid for which the flow rate is to be measured. The phase angle of the thermal wave signal changes when traversing downstream. The phase difference between the signals received downstream, compared with a reference excitation source signal is measured, and used to determine the flow rate of the fluid. | 05-13-2010 |
| 20100139389 | SENSOR, SENSOR TEMPERATURE CONTROL METHOD AND ABNORMALITY RECOVERY METHOD - A heater pattern is arranged on at least one substrate among substrates configuring a package, and a temperature in the package is controlled by controlling a quantity of electricity carried to the heater pattern corresponding to the ambient temperature of a sensor chip in the package. | 06-10-2010 |
| 20100147068 | Method and measuring system for determining and/or monitoring an aggregate state change of a measured medium on a thermal, flow measuring device - A for determining and/or monitoring aggregate state changes on a thermal, flow measuring device of at least a first part of a measured medium, wherein, by means of the temperature of the medium being measured, by means of the chemical composition of the medium being measured and by means of the partial pressure of the at least first part of the medium being measured and/or by means of the total pressure of the medium being measured, at least one phase boundary line of the at least first part of the medium being measured is ascertained At least a first measurement signal is provided from a temperature difference between a first temperature sensor and a second temperature sensor of the thermal, flow measuring device and/or from a heating power supplied the medium being measured, wherein, in the case of a state of the at least first part of the medium being measured in the region of the phase boundary line of the first part of the medium being measured, disturbances of predetermined type in the measurement signal are detected as aggregate state changes on the thermal flow device of the at least first part of the medium being measured. | 06-17-2010 |
| 20100223991 | THERMAL FLOW METER - The thermal flow meter comprises heating means for increasing the temperature in the vicinity of a temperature-sensitive element on a sensor chip that is provided with a pair of temperature-sensitive elements (Ru and Rd) to a particular temperature above the temperature of a fluid that flows along the sensor chip, first flow rate calculating means for calculating the flow rate of the fluid from a temperature difference that is detected by the pair of temperature-sensitive elements, second flow rate calculating means for calculating the flow rate of the fluid from the driving energy of the heating means, and output controlling means for outputting the flow rate calculated by the second flow rate calculating means instead of the flow rate calculated by the first flow rate calculating means when the flow rate calculated by the first flow rate calculating means exceeds a flow rate threshold value. | 09-09-2010 |
| 20100251815 | THERMAL FLOW SENSOR WITH TURBULENCE INDUCERS - A flow sensor ( | 10-07-2010 |
| 20100319450 | METHOD AND APPARATUS TO DEFINE THE VELOCITY OF A FLOWING FLUID - To determine as precisely as possible the flow rate of a liquid flow inside a tube by means of minimal technical and especially minimal apparatus complexity the invention provides with a procedure and an apparatus to determine it. In this process the liquid is heated by means of an optical heating beam while the point of heating is shown through by an optical detection ray. The axis of the heating- and the detection beam coincide at least in the point of heating. The detection beam is absorbed via an array of detectors. In the apparatus the heating device which heats the interior area of a limited internal area of the liquid and the optical control unit of the laser beam are arranged that way that a measuring beam shines through the absolute heating point. | 12-23-2010 |
| 20110005311 | TEMPERATURE SENSOR AND METHOD FOR ITS MANUFACTURE - A thermal, flow measuring device for determining and/or monitoring flow of a measured medium through a measuring tube. The thermal, flow measuring device includes: a first pin-shaped shell and at least a second pin-shaped shell; a first resistance thermometer and at least a second resistance thermometer. At least the first resistance thermometer is embodied so as to be heatable, wherein the resistance thermometers, in each case, have a first surface, and at least a second surface, which lies opposite the first surface. The first pin-shaped shell surrounds the first resistance thermometer, and the second pin-shaped shell surrounds the second resistance thermometer. The pin-shaped shells are fillable with a fill material; wherein, in each case, at least one spacer is placeable between the pin-shaped shell and the first surface of the resistance thermometer, and the second surface of the resistance thermometer is at least partially covered with fill material. | 01-13-2011 |
| 20110100114 | Thermal Loop Flow Sensor - A flow sensor includes a fluidic component, such as a tube, a heat source, an upstream temperature sensor, and a downstream temperature sensors. The fluidic component defines a flow path having inlet and outlet ends disposed closer to each other than to a mid-point of the flow path. The heat source and the upstream and downstream temperature sensors are disposed in thermal communication with a fluid in the flow path. | 05-05-2011 |
| 20110192224 | SUPERHEAT SENSOR - A superheat sensor ( | 08-11-2011 |
| 20120055245 | Thermal Air Flow Sensor - In a thermal air flow sensor according to the invention, a hollow formed in a detecting element is communicated with a circuit chamber, in which driving circuit parts of the detecting element are mounted, or an intake duct exterior. Thereby, pressure in the hollow balances with pressure on the outside. Also, since the circuit chamber is provided to be isolated from a detection chamber, in which a detecting part of the detecting element is arranged, that is, a passage chamber, through which air being a measuring object flows, air flowing in the passage chamber can be restrained from flowing into the hollow to have an influence on flow output characteristics. | 03-08-2012 |
| 20120060599 | Thermal Type Air Flow Meter - A thermal type air flow meter that is capable of suppressing deformation of a base member at the time of molding is disclosed, to thereby secure dimension accuracy and reduce an influence of a dimension change on measuring accuracy. The meter includes a housing member placed in an intake passage of an internal combustion engine, and a base member fixed to the housing member and includes a secondary air passage into which part of air passing through the intake passage flows. The base member is a plate-like resin molded component formed of a synthetic resin material and includes a reinforcing structure integrally formed between a board fixing part to which a circuit board is fixed; and a secondary passage constituting part formed at a leading end part of the board fixing part, the reinforcing structure enhancing strength of the base member. | 03-15-2012 |
| 20120073365 | THERMAL FLOW METER - A flow meter for use in dialysis is described, that uses a thermal wave to generate a signal in the fluid for which the flow rate is to be measured. The phase angle of the thermal wave signal changes when traversing downstream. The phase difference between the signals received downstream, compared with a reference excitation source signal is measured, and used to determine the flow rate of the fluid. | 03-29-2012 |
| 20120096936 | Thermal Analysis Apparatus And Thermal Analysis Method - A thermal analysis apparatus and method, including a sample space with a sample carrier, and heating devices, and an inert gas. Flow devices generate an inert gas flow to the sample carrier. Getter devices and/or oxygen traps disposed in the inert gas flow remove residual oxygen. | 04-26-2012 |
| 20120118058 | METHODS AND APPARATUSES FOR MEASURING PROPERTIES OF A SUBSTANCE IN A PROCESS STREAM - A flow-through sensing apparatus includes a flow-head and a sensor that are configured to be selectively coupled through use of a quick-disconnect mechanical coupling. When the sensor is coupled with the flow-head, the sensor cooperates with the flow-head to at least partially define a sensing chamber. The sensor is configured to determine a process parameter, such as refractive index, regarding a substance in the sensing chamber. | 05-17-2012 |
| 20120160024 | INTAKE TEMPERATURE SENSOR - An intake temperature sensor capable of precisely detecting the temperature of intake at high speed even in a low air mass flow zone is provided. In an intake temperature sensor having a temperature detecting element | 06-28-2012 |
| 20120192642 | FLOW SENSOR ASSEMBLY WITH INTEGRAL BYPASS CHANNEL - Flow sensor assemblies having increased flow range capabilities are disclosed. In one illustrative embodiment, a flow sensor assembly includes a housing with an inlet flow port, an outlet flow port, a fluid channel extending between the inlet flow port and the outlet flow port, and a bypass channel having a pair of taps fluidly connected to the fluid channel at separate locations. A flow sensor for sensing a measure related to a flow rate of a fluid flowing through the fluid channel can positioned in the bypass channel. A pressure differential between the two taps of the bypass channel can drive a fraction of a fluid flowing through the fluid channel through the bypass channel. The flow sensor assembly may be configured to achieve, control, and/or balance a desired fraction of fluid flow through the bypass channel and past the flow sensor. | 08-02-2012 |
| 20120222479 | METHOD FOR DETECTING PLUGGING IN A CORIOLIS FLOW MEASURING DEVICE - A method for detecting plugging of a measuring tube. Heat is supplied to a medium conveyed in a first measuring tube by means of at least one heating element, or heat is removed from the medium conveyed in a first measuring tube by means of at least one cooling element. At least one temperature sensor, which is thermally coupled to the medium conveyed in the first measuring tube, temperature is registered. Additionally, a first comparison variable, which is characteristic for heat transport by the medium in the first measuring tube, is determined based on the supplying of heat or removing of heat, as well as on the temperature registering, and this comparison variable is compared with a reference variable. Plugging of at least one measuring tube of the measuring transducer is detected if the first comparison variable deviates from the reference variable by more than a limit value. | 09-06-2012 |
| 20120285236 | METHOD OF USING A TEMPERATURE-BASED AEROSOL DETECTOR - An aerosol delivery system (e.g., MDI or nebulizer for delivering aerosolized medication to a patient) includes a temperature sensor in an aerosol output pathway of the system. A controller determines that an aerosol generator of the system has released aerosol when the sensor senses a predetermined temperature change in the pathway. The temperature sensor may also comprise a thermal flow sensor that includes a heater and upstream and downstream temperature sensors. The controller compares the upstream and downstream temperatures to determine the presence, direction, and/or magnitude of fluid flow in the pathway. The controller may use the aerosol detection and/or flow detection to monitor compliance with desired use of the system and/or provide real-time instructions to a user for proper use of the system. The controller may record the aerosolization and flow data for later analysis. | 11-15-2012 |
| 20120291540 | Infusion Apparatus With Flow Detector - A device for dispensing fluid to a patient and indicating a fluid flow condition. The device includes a reservoir configured to provide a source of fluid under pressure. A continuous flow path in fluid communication with the source of fluid provides a continuous and substantially constant flow rate of fluid from the source to a patient. The device further includes at least one flow detector in fluid communication with the continuous flow path. The flow detector is configured to provide a signal that the flow rate of the fluid in the continuous flow path is different from a predetermined flow rate, thereby indicating a fluid flow condition. | 11-22-2012 |
| 20130014577 | Sensor for measuring flow speed of a fluidAANM Tam; HwayawAACI Hong KongAACO HKAAGP Tam; Hwayaw Hong Kong HKAANM Zhang; ApingAACI Hong KongAACO HKAAGP Zhang; Aping Hong Kong HKAANM Gao; ShaoruiAACI Hong KongAACO HKAAGP Gao; Shaorui Hong Kong HKAANM Cho; Lok HinAACI Hong KongAACO HKAAGP Cho; Lok Hin Hong Kong HK - A sensor for measuring flow speed of a fluid, comprising: a light-absorbing optical fiber having a fiber Bragg grating inscribed in the fiber; wherein light is emitted into the light-absorbing optical fiber to heat the optical fiber and the fiber Bragg grating, and when the fluid passes over the sensor, the flow speed of the fluid is determined by the rate of heat loss from the sensor, and the temperature of the sensor is determined from the wavelength shift of the central wavelength of the fiber Bragg grating. | 01-17-2013 |
| 20130031973 | METHOD FOR DETECTING ACCRETION OR ABRASION IN A FLOW MEASURING DEVICE - A method for detecting accretion or abrasion on a first measuring tube of a flow measuring device. A first temperature as a function of time is registered via a first temperature sensor, which is arranged on the first measuring tube in such a manner that, between the first temperature sensor and the medium, at least one measuring tube wall of the first measuring tube is embodied. Parallel in time, a second reference temperature as a function of time is registered by a second temperature sensor, which is spaced from the first temperature sensor and thermally coupled to the medium. Therefrom, at least one variable characteristic is determined, and accretion or abrasion on the first measuring tube is detected, if the at least one determined characteristic variable or a variable derived therefrom deviates by more than a limit value from a predetermined reference variable. | 02-07-2013 |
| 20130074593 | FLOW SENSOR, MASS FLOW CONTROLLER, AND METHOD FOR MANUFACTURING FLOW SENSOR - According to one embodiment, a first substrate has a pair of thermosensitive films, a heater film, and a passage protective film having corrosion resistance in a passage forming region on a first main surface, and has a metal sealing film having corrosion resistance in a region other than the passage forming region. A second substrate has a groove formed in the passage forming region on a second main surface and a side wall forming portion separating other regions other than the passage forming region from the groove and protruding beyond the other regions. A fixing member fixes the first substrate to the second substrate. The side wall forming portion of the second substrate is compression bonded so that the side wall forming portion is located on the metal sealing film on the first substrate. | 03-28-2013 |
| 20130086983 | FUEL SENSOR - A tubular external electrode has an inner passage configured to flow fuel therethrough. A bottomed tubular internal electrode is at a predetermined distance from an inner wall of the external electrode. A temperature sensor is located in the internal electrode. A detection unit detects a property of fuel according to both a signal from the temperature sensor and an electrical property of fuel in the inner passage. The temperature sensor has a center located between the center axis of the internal electrode and an inner wall of the internal electrode located on an upstream side relative to fuel flow in the inner passage. | 04-11-2013 |
| 20130319105 | MICRO FLOW SENSOR - A micro flow sensor includes: a flow path through which a fluid to be measured flows; a detection unit having a heater configured to heat the fluid to be measured in the flow path and temperature sensors configured to measure temperature of a fluid to be measured in the flow path; an arithmetic unit configured to measure a flow rate of the fluid to be measured flowing through the flow path based on the temperature of the fluid to be measured, measured by the temperature sensors; and a narrowed portion disposed on an upstream side of the detection unit in the flow path for narrowing the flow path. | 12-05-2013 |
| 20140000359 | OPERATING A THERMAL ANEMOMETER FLOW METER | 01-02-2014 |
| 20140076044 | THERMAL FLOW SENSOR AND METHOD OF GENERATING FLOW RATE DETECTION SIGNAL BY THE THERMAL FLOW SENSOR - Provided is a thermal flow sensor capable of obtaining a flow rate detection signal that differs depending on a flow direction of a fluid, with a simple configuration and at low cost. The thermal flow sensor includes: a bridge circuit ( | 03-20-2014 |
| 20140083180 | MEASUREMENT APPARATUS FOR MEASURING THE THROUGHFLOW OF A FLUID - A measurement apparatus having a measurement tube and a thermal sensor for measuring a throughflow of a fluid flowing through the measurement tube, the measurement tube having an inlet and an outlet, and also a measurement section, in which the sensor is arranged. The inlet has an inlet internal diameter and the measurement section has a measurement section internal diameter, and whereby the measurement section internal diameter is greater than the inlet internal diameter. | 03-27-2014 |
| 20140109663 | Flowmeter for Installation Under Pressure, Equipment for Installing the Flowmeter, and Installation Method - A flowmeter of the thermal type, having a heated flow-sensing element and a temperature-sensing reference element, the elements constructed and arranged to be installed in a pressurized pipe. The flowmeter has one probe with the heated element and a separate second probe with the reference element. The probes are constructed and arranged to pass through the pipe wall in separate through-holes. There is a mounting structure such as a split ring that is adapted to be mounted to the pipe. Two valves operatively coupled to separate locations of the mounting structure, where one probe passes through each valve and into the pipe. | 04-24-2014 |
| 20140116128 | METHOD AND APPARATUS FOR MEASURING THE FLOW RATE OF A LIQUID - The invention is an apparatus and method for measuring the flow rate of a liquid through a conduit. The apparatus is based on a flow rate meter which is adapted to accurately measure the volumetric flow rate of a liquid using a simple, cost and energy effective, and accurate method using only one temperature sensor. The method is based on applying a pulse of thermal energy to the flowing liquid and measuring the temperature increase as a function of time and energy input. By comparing these measurements to a calibration table made by performing similar measurements for known flow rates, the rate of flow can be determined. One application, which will be described to illustrate the features of the method and apparatus of the invention, is measurement of the flow rate of urine excreted by a catheterized patient. | 05-01-2014 |
| 20140157886 | DEVICE FOR DETERMINING THE FLOW RATE ACCORDING TO THE FLOAT PRINCIPLE - A Device for determining the flow of a flowing medium according to the float principle with at least one floating body and at least one measuring tube with medium flowing through it, wherein the floating body is movable in the measuring tube along an axis ( | 06-12-2014 |
| 20140216152 | CHARACTERIZING MULTIPHASE FLUID FLOW - A method and apparatus for determining multiphase flow characteristics inside production equipment containing at least two fluids. A pulse of heat from a heat source adjacent to the production equipment is provided, and a thermal response to the pulse is measured at each of a plurality of temperature sensors located adjacent to the production equipment. The thermal response measurement includes a time constant obtained from a measured decline in the temperature after the pulse of heat has been provided. The measured thermal responses are used to determine parameters of a fluid contained in the production equipment in proximity to each of the temperature sensors. The determined fluid parameters are in turn used to determine multiphase flow characteristics. | 08-07-2014 |
| 20140251003 | GAS METER - A gas meter, having a gas inlet, a gas outlet and a measuring section, in which a measuring device, in particular a measuring device for thermal flow measurement, is arranged, wherein a filtering device for removing particulate impurities is arranged downstream of the gas inlet, characterized in that the filtering device ( | 09-11-2014 |
| 20140290355 | Systems and Methods for Thermal Imaging Technique for Measuring Mixing of Fluids - Systems and methods for thermal imaging for measuring mixing of fluids are provided. In one embodiment, a method for measuring mixing of gaseous fluids using thermal imaging comprises: positioning a thermal test medium parallel to a direction gaseous fluid flow from an outlet vent of a momentum source, wherein when the source is operating, the fluid flows across a surface of the medium; obtaining an ambient temperature value from a baseline thermal image of the surface; obtaining at least one operational thermal image of the surface when the fluid is flowing from the outlet vent across the surface, wherein the fluid has a temperature different than the ambient temperature; and calculating at least one temperature-difference fraction associated with at least a first position on the surface based on a difference between temperature measurements obtained from the at least one operational thermal image and the ambient temperature value. | 10-02-2014 |
| 20140352423 | OPERATING A HIGH ACCURACY THERMAL ANEMOMETER FLOW METER IN GAS STREAM CONTAINING LIQUID DROPLETS - A method is provided to operate a thermal anemometer flow meter to measure a property of a stream. The method includes measuring a first heat loss to the stream from operating at a first DeltaT above a temperature of the stream, measuring a second heat loss to the stream from operating at a second DeltaT above the temperature of the stream where the second DeltaT being greater than the first DeltaT. The method further includes determining the property of the stream based on the first and the second heat losses. | 12-04-2014 |
| 20140360260 | FUEL LEVEL INFERENCE FROM CANISTER TEMPERATURES - Methods and systems for inferring a fuel level in a fuel tank based on temperature changes in a carbon canister are disclosed. In one example approach a method comprises, indicating a fuel level in a fuel tank based on a temperature change of adsorbent in a carbon canister during refueling. | 12-11-2014 |
| 20140360261 | Thermal Type Air Flow Meter Having a Reinforcing Structure Provided on the Base Member between the Board Fixing Part and the Secondary Passage Constituting Part - A thermal type air flow meter that is capable of suppressing deformation of a base member at the time of molding is disclosed, to thereby secure dimension accuracy and reduce an influence of a dimension change on measuring accuracy. The meter includes a housing member placed in an intake passage of an internal combustion engine, and a base member fixed to the housing member and includes a secondary air passage into which part of air passing through the intake passage flows. The base member is a plate-like resin molded component formed of a synthetic resin material and includes a reinforcing structure integrally formed between a board fixing part to which a circuit board is fixed; and a secondary passage constituting part formed at a leading end part of the board fixing part, the reinforcing structure enhancing strength of the base member. | 12-11-2014 |
| 20140373621 | METHOD FOR DETERMINING AT LEAST ONE GAS PARAMETER OF A FLOWING GAS - A method for determining at least one gas parameter, of a flowing gas, by means of a flow meter, comprising a measurement section having a heating element and at least three temperature sensors, over which the gas is fed, at least one first temperature sensor being arranged upstream of the heating element, at least one second temperature sensor being arranged in the region of the heating element, and at least one third temperature sensor being arranged downstream of the heating element, wherein a calculation unit determines the at least one gas parameter as a function of the temperature measurement values at the first, second and third temperature sensors, and/or at least two separate gas parameters as a function of the temperature measurement values of individual different temperature sensors and/or the combinations of temperature measurement values of different temperature sensors. | 12-25-2014 |
| 20150096365 | MANUFACTURING METHOD FOR RESIN HOLLOW MEMBER AND AIRFLOW MEASURING DEVICE HAVING THE RESIN HOLLOW MEMBER - A pair of half hollow members are mated to each other at mating surfaces to form a resin filling space between the mating surfaces. The resin filling space is charged with melting resin, and the melting resin is solidified. Each of the mating surface has a groove. The groove has a bottom surface in which a hole opens. The groove and the hole form the resin filling space between the mating surfaces when the half hollow members are mated to each other. A wall surface of the groove and an inner circumferential periphery of the hole are equipped with a melting projection, which are configured to be melted with heat of the melting resin and to be solidified with the melting resin. | 04-09-2015 |
| 20150122009 | SYSTEMS AND METHODS FOR TEMPERATURE COMPENSATED FLOW SENSING - Systems and methods for temperature compensated flow sensing are provided. One system includes a flow disturber disposed in a flow conduit, wherein the flow disturber is configured to impart a flow disturbance to the fluid flow. The system further includes a plurality of flow sensors disposed in the flow conduit, wherein the plurality of sensors are responsive to flow characteristics in the flow conduit. The system also includes at least one temperature sensor disposed in the flow conduit, wherein the at least one temperature sensor is responsive to temperature characteristics in a vicinity of the plurality of flow sensors. The system additionally includes a measurand separator configured to generate an output signal based on at least one of the flow characteristics or temperature characteristics. The system includes a processor configured to determine a temperature compensated flow rate of the fluid flow in the flow conduit using the output signal. | 05-07-2015 |
| 20150300856 | Thermal, Flow Measuring Device - A thermal, flow measuring device for determining and/or monitoring a mass flow of a measured medium through a measuring tube, comprising a sensor having a first heatable resistance thermometer and at least a second heatable resistance thermometer, wherein the sensor has a longitudinal axis and an end face, which is divided into at least two adjoining segments, wherein a surface normal vector of at least a first segment forms with the longitudinal axis of the sensor an angle of at least 5°; and use of a thermal, flow measuring device. | 10-22-2015 |
| 20150308871 | METHOD FOR MAKING RESIN HOLLOW BODY AND FLOW MEASURING DEVICE - A metal mold includes a restraining part that is fitted in a recess provided at a part of surfaces of at least two resin parts that serves as an outer surface of a resin hollow body. A linear space is filled with high-pressure resin fluid injected at a predetermined injection pressure. The resin parts are joined together. The mold receives injection pressure of resin fluid, with which the space is filled, through the resin parts, and applies pressing force, which pushes back the resin parts toward the space, to the resin parts as reaction force against injection pressure. Stress is produced on a hollow wall surface in a direction in which the wall surface projects into a hollow portion due to injection pressure. The restraining part applies pressing force to the resin parts in a direction opposite from the stress projecting the wall surface into the hollow portion. | 10-29-2015 |
| 20150316401 | THERMAL, FLOW MEASURING APPARATUS AND METHOD FOR DETERMINING AND/OR MONITORING FLOW OF A MEDIUM - A thermal, flow measuring apparatus for determining and/or monitoring flow of a measured medium through a measuring tube, comprising at least two temperature sensors, wherein a first temperature sensor is heatable, and a second temperature sensor serves to provide the temperature of the measured medium. According to the invention, the thermal, flow measuring apparatus has at least one measuring transducer for ascertaining the following properties of the medium: thermal conductivity, heat capacity, density and dynamic viscosity or thermal conductivity, thermal diffusivity, density and dynamic viscosity. | 11-05-2015 |
| 20160011028 | ENHANCED DIFFERENTIAL THERMAL MASS FLOW METER ASSEMBLY AND METHODS FOR MEASURING A MASS FLOW USING SAID MASS FLOW METER ASSEMBLY | 01-14-2016 |
| 20160169722 | OPERATING A THERMAL ANEMOMETER FLOW METER | 06-16-2016 |
