| Entries |
| Document | Title | Date |
|---|
| 20080210002 | Flow Sensor - A flow meter includes a heating means ( | 09-04-2008 |
| 20090044620 | Shell flow sensor - A flow sensor system and a method for fabricating the same. A substrate is provided, comprising a detector wafer upon which a flow sensor is formed. One or more shells can then be configured upon the substrate whose walls form a flow channel. The flow channel is fabricated directly upon the substrate in a manner that allows the flow channel to couple heat transfer directly to the flow sensor in order to eliminate the need for two or more different types of sacrificial layers during the fabrication of the flow sensor upon the substrate and in which the shell(s) is coupled with fluidic measurement to provide for the flow sensor. | 02-19-2009 |
| 20090071243 | FLUID DETECTOR - A detector and a method for determining the presence of a fluid are disclosed. The detector comprises a probe having a thermistor with the probe being arranged to be exposed to a fluid and to allow thermal flow between the thermistor and the fluid, a temperature sensor for measuring the temperature of the thermistor and a controller. The controller is arranged to supply electrical power to the thermistor when it is below a predetermined temperature to heat it up and to turn off the supply of electrical power to the thermistor when it is at or above the predetermined temperature. The presence or identity of a fluid exposed to the probe is determined based on the proportion of time that power is supplied to the thermistor to maintain it substantially at the predetermined temperature. The ambient temperature of the fluid to which the probe is exposed may also be measured and electrical power may be supplied to the thermistor to keep it substantially at a predetermined temperature above the measured ambient temperature. | 03-19-2009 |
| 20090071244 | FLUID DETECTOR - A detector for identifying a fluid is disclosed. The detector comprises a probe having a thermistor, the probe being arranged to be exposed to a fluid and to allow thermal flow between the fluid and the thermistor; a temperature sensor to measure the ambient temperature of the fluid and a controller. The controller is arranged to supply electrical power to the thermistor and to provide an output indicative of the identity of the fluid based upon whether the electrical power supplied to the thermistor is above or below a threshold value. The threshold value is adjustable in accordance with the measured ambient temperature of the fluid. Examples of such a detector provide reliable fluid identification despite variations in ambient temperature of the fluid and such a detector may be compact, inexpensive, reliable and robust. | 03-19-2009 |
| 20090151445 | FLUID FLOW RATE MEASUREMENT APPARATUS - Disclosed herein is a fluid flow rate measurement apparatus which prevents accumulation of pollutional substances in a sub-passage to enable high-accuracy fluid flow rate measurement. | 06-18-2009 |
| 20090165551 | Flowmeter for Determining a Flow Direction - A flowmeter determines the flow direction of a fluid. The flowmeter has a measuring element, around which the fluid flows and which comprises at least one fiber-optic cable and at least two electrical heating elements that lie adjacent to the fiber-optic cable(s) by a respective heat stream emanating from the respective heating element and directed towards at least one fiber-optic cable, the directions of the heat streams being at least proportionately reversed. In addition, the values of the individual heat streams can be influenced to different extents, depending on the flow direction of the fluid. An electromagnetic wave that can be coupled into the fibre-optic cable(s) can also be influenced according to the temperature of the fibre-optic cable(s). Additionally, the flow meter has a control unit, which is used to feed electric energy to the two or more heating elements one after the other, and an evaluation unit, which is used to evaluate the temperature effect of the electromagnetic wave that emanates from the individual heat streams and to determine the flow directed of the fluid. | 07-02-2009 |
| 20100139390 | APPARATUS FOR DETERMINING AND/OR MONITORING MASS FLOW - The invention relates to an apparatus for determining and/or monitoring mass flow of a fluid medium ( | 06-10-2010 |
| 20110132083 | Low Temperature Gas Flow Sensor - A method, and apparatus therefor, for detecting the presence of a target amount of gas flowing within a conduit, including: providing a heating element in operational contact with the conduit; heating at least one of the conduit or the gas; measuring the temperature of at least one of the heating element, the conduit or the gas; comparing the measured temperature of at least one of the heating element, the conduit or the gas to data relating to a target temperature; controlling and measuring the amount of energy consumed by the heating element in order to maintain the target temperature; correlating the amount of energy consumed by the heating element in order to maintain the target temperature with an amount of gas flowing within the conduit; and determining whether the amount of gas flowing within the conduit is at least the target amount of gas flowing within the conduit. | 06-09-2011 |
| 20110174069 | Nanowires and Method for the Production there of - The invention concerns the production of segmented nanowires and components having said segmented nanowires. | 07-21-2011 |
| 20110226053 | FLOW SENSOR ASSEMBLY WITH POROUS INSERT - The present disclosure relates generally to flow sensors, and more particularly, to methods and devices for reducing variations in fluid flow across the flow sensor for increased accuracy and/or reliability. In one illustrative embodiment, a flow sensor assembly includes a housing with an inlet flow port and an outlet flow port. The housing defines a fluid channel extending between the inlet flow port and the outlet flow port, with a flow sensor positioned in the housing and exposed to the fluid channel. The flow sensor is configured to sense a measure related to the flow rate of a fluid flowing through the fluid channel. A porous insert is situated in the fluid channel, sometimes upstream of the flow sensor. When so configured, and during operation of the flow sensor assembly, a fluid may pass through the inlet flow port, through the porous insert, across the flow sensor, and through the outlet flow port. The porous insert may include pores that are configured to reduce the turbulence in the fluid passing the flow sensor. | 09-22-2011 |
| 20110252881 | SENSOR ARRANGEMENT FOR A CALORIMETRIC MASS FLOWMETER - A sensor arrangement including a probe and a bracket that are provided for a calorimetric mass flow meter for measuring the mass flow in a measuring tube. The probe is mounted in the bracket in such a manner that the probe is guided essentially without contact with a radial spacing through a probe recess a wall of the measuring tube and is positioned in a cross section of a flow-through area of the flow of the measuring tube. The bracket is designed in such a manner that the probe is thermally de-coupled from the measuring tube. The sensor arrangement for the calorimetric mass flow meter is capable of increasing the measuring accuracy and increasing the flexibility during operation. | 10-20-2011 |
| 20120152014 | SENSOR BRIDGE WITH THERMALLY ISOLATING APERTURES - A sensor having a sensor bridge supported above a substrate is disclosed. A number of thermally isolating apertures are provided in the sensor bridge to help increase the thermal isolation of the sensor bridge from the substrate. In one illustrative embodiment, a heater element, an upstream sensor element, and/or a downstream sensor element are provided on the sensor bridge. A plurality of apertures may extend through the sensor bridge to thermally isolate the heater element, the upstream and/or downstream sensor element from the substrate and/or from each other. In one illustrative embodiment, the plurality of apertures may be provided at spaced locations adjacent a first lateral side of the sensor bridge, adjacent the second lateral side of the sensor bridge, between the heater element and the upstream sensor element, and/or between the heater element and the downstream sensor element. In some cases, the plurality of apertures may be substantially round, oval, rectangular and/or any other suitable shape. | 06-21-2012 |
| 20120186337 | DEVICE FOR CHARACTERIZING THE NATURE OF AN AERODYNAMIC FLOW ALONG A WALL AND LOOP FOR CONTROLLING A PROFILE OF THE WALL - A device for characterizing the nature of an aerodynamic stream along a wall, the device including multiple temperature-sensitive optical nodes of Bragg grating type distributed along an optical fiber, and means for determining the variations in speed of the aerodynamic stream. The nodes are distributed along a fiber placed substantially following the route of a streamline, and processing means are devised so as to differentiate the temporal and spatial characteristics of the signals of thermal flowrate among the nodes. | 07-26-2012 |
| 20120192643 | FLOW SENSOR WITH ENHANCED FLOW RANGE CAPABILITY - 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, and a fluid channel extending between the inlet flow port and the outlet flow port. One or more partitions are provided in the fluid channel of the housing to define two or more fluid sub-passages. A flow sensor, for sensing a measure related to a flow rate of a fluid flowing through the fluid channel, is positioned in one of the two or more fluid sub-passages. In some cases, the cross-sectional area of each of the two or more fluid sub-passages may be substantially the same, but this is not required. The housing may be formed from a single molded part defining the inlet and outlet flow ports, at least a portion of the fluid channel, and one or more of the partitions. In this case, a top cover may be provided and mounted to the housing to define the remaining portion of the fluid channel, if desired. | 08-02-2012 |
| 20120210781 | SENSOR SYSTEM FOR MEASURING A VELOCITY OF A FLUID - The invention relates to a sensor system ( | 08-23-2012 |
| 20120318058 | HEAT CONDUCTION-TYPE SENSOR FOR CALIBRATING EFFECTS OF TEMPERATURE AND TYPE OF FLUID, AND THERMAL FLOW SENSOR AND THERMAL BAROMETRIC SENSOR USING THIS SENSOR - A heat conduction-type sensor corrects (calibrate) effects of a temperature of a measurement target fluid and a type of the fluid on a measurement value in measurement of a flow velocity, a mass flow, or an atmospheric pressure. Also provided is a thermal flow sensor and a thermal barometric sensor with this correcting function, high sensitivity, simple configuration, and low cost. At least two thin films that are thermally separated from a substrate through the same cavity are provided, one thin film comprises a heater and a temperature sensor, and the other thin film comprises at least one temperature sensor, the temperature sensors being thin-film thermocouples. The thin film is arranged in proximity so that it is heated only through the measurement target fluid by heating of the heater. A calibration circuit calculates and compares quantities concerning heat transfer coefficients of a standard fluid and the unknown measurement target fluid. | 12-20-2012 |
| 20130025364 | APPLIANCE AIRFLOW DETECTION USING DIFFERENTIAL HEATING OF ELECTRONIC DEVICES - Apparatus and methods are disclosed to measure airflow within a chassis-cooling pathway of an appliance. The rate of airflow is determined based on the differential heating among a pair of sensor devices, such as thermistors, transistors, diodes or resistive thermal devices operating at distinctly different power levels. The appliance utilizes the calculated airflow rate to perform safety-related tasks, such as de-energizing heating elements when low or no airflow is detected. | 01-31-2013 |
| 20150027221 | THERMAL FLOWMETER - A highly reliable, simple-structured and low-cost thermal flowmeter is provided. The thermal flowmeter in an embodiment according to the present invention includes a planar heating element located to surround a part of an outer side surface of a flow path; first and second temperature detection elements located on the planar heating element at a prescribed interval; and electrodes located at both of two ends of the planar heating element. The planar heating element contains a carbon material and cellulose fiber. | 01-29-2015 |
| 20150068299 | Gaseous Flow Sensor and Related Method Thereof - A gas flow sensing device, and related method of manufacturing, comprising a conductive layer encapsulated in dielectric film, suspended over a cavity to form a diaphragm. The conductive layer functions as both a heating a sensing element and is patterned to provide uniform heat distribution across the diaphragm. The device is designed to sense flow from any direction relative to the device and the design of the dielectric film and diaphragm reduces sensor drift during prolonged operation. | 03-12-2015 |
| 20150075277 | METHOD FOR THERMALLY DETERMINING MASS FLOW OF A GASEOUS MEDIUM AND THERMAL MASS FLOW METER - A method for determining mass flow of a gas by means of a mass flow meter, which has a first and a second temperature sensor, which can be flowed around by the gas. The first temperature sensor is heated with a heating power Q, wherein the mass flow of the medium is determined by means of a power coefficient PC=Q/ΔT as a function of a heating power Q and a temperature difference ΔT | 03-19-2015 |
| 20150292929 | Air mass sensor - An air mass sensor includes a microelectromechanical-type sensor element having a heating element. A first temperature sensor element is arranged on the sensor element upstream of the heating element, and a second temperature sensor element is arranged on the sensor element downstream of the heating element. The first temperature sensor element has a first width and a first length, and the second temperature sensor element has a second width and a second length. To eliminate or closely limit false measurement results due to the presence of dirt on the sensor element, the first width of the first temperature sensor element is greater than the second width of the second temperature sensor element. | 10-15-2015 |
| 20160195419 | Sensor for Determining a Process Variable of a Medium | 07-07-2016 |
