Class / Patent application number | Description | Number of patent applications / Date published |
073204270 | Wire type (e.g., hot wire) | 20 |
20080295591 | Air flow inertial sensor - The present invention relates to a gas pendulum inertial sensor, which is used in control technology field to detect pose measurement of motional body, such as ship craft and robot, wherein the inertial sensor main includes a gas pendulum angular velocity sensing element, a gas pendulum tilt sensing element and a signal process circuit, wherein the signal process circuit mainly comprises a bridge circuit, a amplify circuit, a filter circuit, and a SCM compensation circuit with a null position and sensitivity compensation program, a linearity and output compensation program, an acceleration interference offset subprogram, and an omnibearing tilt signal compensation program, whereby the SCM compensation circuit integral into a circuit board to replace a conventional hardware signal amplify circuit, a filter circuit and a compensation circuit. The gas pendulum inertial sensor is adapted to accurately measure not only an object's indication without interference from the acceleration, but also an object's indication with interference from the acceleration. The gas pendulum inertial sensor has some significant advantages like highly attack-resist ability, intensively vibrate-resist ability, quick response time, wide ranges of working temperature, well linearity, credibility, sensitivity and precision ability, compact capacity and lower cost. | 12-04-2008 |
20090000372 | Thermal Flow Measurement Device - Conventional thermal flow measurement devices lack consideration for automobiles in severe environments. A detection element of the thermal flow measurement device according to the present invention is structured by the provision of a planar substrate made of a material having good thermal conductivity, such as silicon or ceramic, with a thin-walled portion (diaphragm). On the surface of the thin-walled portion, the detection element comprises a heat element as a heater heated to a temperature being different to a predetermined extent from the temperature of the air flow to be measured, temperature-detecting resistors as temperature-detecting means on both sides of the heat element, wiring portions formed of electrical conductors that draw signal lines from the heat element and the temperature-detecting resistors and that have a melting point of 2000° C. or higher, and pads. | 01-01-2009 |
20090133490 | DEVICE AND PROCESS FOR MEASURING THE VELOCITY OF FLOW OF A FLUID - A device is provided for measuring the velocity of flow of a fluid in a respiration system and includes a first thermal sensor element ( | 05-28-2009 |
20090199633 | FLOW SENSOR AND MASS FLOW CONTROLLER USING THE SAME - A low cost, compact, high performance flow sensor that can be made small in size even for use in a large flow rate and a mass flow controller using the same are provided. The flow sensor includes a bypass passage, a sensor passage, and a bridge circuit including heat-generating resistance wires that constitute a part of the bridge circuit and are wound around the sensor passage. The flow sensor determines a total flow rate of a fluid that flows in a branched manner through the bypass passage and the sensor passage at a predetermined flow ratio. The total flow rate is determined by detecting, as an unbalance of the bridge circuit, heat transfer caused by the fluid flowing through the sensor passage and is outputted as a sensor output of the flow sensor. In the flow sensor, the bypass passage includes a plurality of fine flow passages each having a cross-section defined by a substantially linear edge and a curve in contact with the substantially linear edge. The ratio of the equivalent hydraulic diameter (d) of the fine flow passages to the common logarithm of the length (T) of the fine flow passages is 0.27 or less. The flow sensor is installed in the mass flow controller. | 08-13-2009 |
20090272187 | THERMAL TYPE FLOW METER - There is provided a thermal type flow meter capable of accurately detecting a flow rate even when a fluid temperature varies rapidly or when the fluid temperature is high. A probe includes: a first main heating resistor; a second main heating resistor set at a temperature different from that of the first main heating resistor; and a sub-heating resistor for heating lead wires of the two main heating resistors. A CPU of a sensor control circuit finds a fluid temperature by using the two main heating resistors, and finds a fluid flow rate by using at least one of the two main heating resistors. | 11-05-2009 |
20090288481 | TEMPERATURE SENSOR - A sensor having a temperature dependent resistor mounted within a protective housing. The resistor is connected to external circuitry via a pair of connecting wires. In use, variations in temperature of the exhaust gas cause a variation in the temperature experienced by the resistor and consequently, the resistance of the resistor also varies. The resistor is mounted in a projecting end portion of the housing which is of narrower cross-section than the bulk of the housing. The housing is filled with a filler material. The filler material provides support to the resistor and the wires. In the present invention, unlike in prior art sensors, the filler material does not completely fill the housing. Instead a gap is provided which is crossed by the wires. The gap interrupts heat flow through the filler material and thus improves the thermal isolation of the resistor and thereby the accuracy of the sensor. In an alternative embodiment, the sensor additionally comprises an additional heat exchange element. The provision of the additional heat exchange element improves the flow of heat from the exhaust gas to the resistor, thus providing a faster response when the temperature rapidly changes and higher measurement accuracy. | 11-26-2009 |
20100175469 | Electrically heated fluid tube - An electrically heated, flexible fluid conduit or tube ( | 07-15-2010 |
20100326185 | TEMPERATURE MEASURING CIRCUIT IN A FLOWMETER - A value of a line-to-line resistor ( | 12-30-2010 |
20110072898 | AIRFLOW SPEED DETECTION DEVICE - An airflow speed detection device for measuring an airflow speed includes an airflow speed switch, and a connector. The airflow speed switch includes a detection head, and an elastic piece. The connector is electrically connected to the testing the airflow speed switch to connect an indicator to indicate close and open states of the airflow speed switch. If the airflow speed is not faster than a critical value, the elastic piece contacts the detection head to close the airflow speed switch. If the airflow speed is faster than the critical value, the elastic piece is blown away from the detection head to open the airflow speed switch. | 03-31-2011 |
20110088464 | FLOW RATE MEASURING APPARATUS - The flow rate measuring apparatus includes a connector portion, a main body portion, a bypass passage, a flow rate sensing element having a flow rate detection portion, a control circuit, a pair of metal terminals having end portions connected to a connector, embedded portions molded integrally with a resin portion constituting the main body portion, and exposed portions exposed in the main passage, which are connected to each other in a cascade manner, and a fluid temperature sensing element having a temperature sensing portion. The fluid temperature sensing element is arranged at a position apart from an outer wall surface of a side face of the bypass passage, and the temperature sensing portion is arranged at the center between the pair of metal terminals that are exposed in the main passage by the same length or between extension lines thereof. | 04-21-2011 |
20110146398 | FLOW SENSORS HAVING NANOSCALE COATING FOR CORROSION RESISTANCE - A corrosion resistant flow sensor apparatus includes a flow sensor including a micromachinable substrate mounted on a package substrate that includes electrically conductive traces and substrate bond pads. The flow sensor includes a MEMS sensing structure for sensing a mass flow parameter and sensor bond pads coupled to the sensing structure. The sensor bond pads include a top metal layer on a metal diffusion barrier layer including a metal diffusion barrier layer sidewall. Bond wires couple the sensor bond pads to the substrate bond pads. A housing including sides and a top portion is around the flow sensor and includes a flow channel having an inlet and an outlet. A multi-layer corrosion protection coating includes a nm scale adhesion layer and a self assembled monolayer (SAM) is on the adhesion layer. The protection coating covers the sensor bond pads including the metal diffusion barrier layer sidewall. | 06-23-2011 |
20110252882 | ROBUST SENSOR WITH TOP CAP - A robust sensor, such as a robust flow sensor or pressure sensor, is provided. In one illustrative embodiment, a robust flow sensor includes one or more flow sensor components secured relative to a membrane, and a substrate for supporting the membrane. In some cases, the one or more flow sensor components may be substantially thermally isolated from the substrate by the membrane. One or more wire bond pads may be situated adjacent to a first side of the substrate and may be provided for communicating signals relative to the one or more flow sensor components. A top cap may be situated adjacent to the first side of the substrate and secured relative to the substrate. The top cap may define at least part of a fluid inlet and/or an outlet of the flow sensor assembly, and may at least partially define a flow channel that extends from the inlet, past at least one of the one or more flow sensor components, and out the outlet of the flow sensor assembly. The top cap may be structured and attached relative to the first side of the substrate such that the one or more wire bond pads are not exposed to a fluid in the flow channel, but are accessible for electrical connection to an external device. While a flow sensor is used as an example, it is contemplated that any suitable sensor may be used, as desired. | 10-20-2011 |
20110296910 | THERMAL FLUID FLOW APPARATUS - Provided is a compact apparatus for measuring the flow rate of a fluid. The apparatus includes a heated measure element and a heated reference element which are in substantially the same thermal environment within a measure cell, except that the measure element is situated in the path of the cooling fluid flow and the reference element is sheltered from this direct fluid flow. These elements are arranged as parallel and concentric planar elements that are essentially identical to each other with matching thermal characteristics. The elements are electrically connected in a Wheatstone bridge arrangement. Thermal exchange between the reference and measure elements is used to optimise noise rejection due to common mode background thermal effects. Measured parameters from the bridge can be used to derive the fluid flow rate. | 12-08-2011 |
20110308312 | DEVICE FOR REGULATING A WIRE ANEMOMETER - An anemometer probe having a single wire or n wires (n>1) that are mutually parallel, for a measurement close to a wall, comprising, for each wire: a) two pins for holding the wire in place, the end of each pin having a flat zone for positioning and fastening the wire; and b) a straight portion of wire brazed onto said flat zones for positioning and fastening the wire. | 12-22-2011 |
20120192645 | FLOW SENSORS HAVING NANOSCALE COATING FOR CORROSION RESISTANCE - A corrosion resistant flow sensor apparatus includes a flow sensor including a micromachinable substrate mounted on a package substrate that includes electrically conductive traces and substrate bond pads. The flow sensor includes a MEMS sensing structure for sensing a mass flow parameter and sensor bond pads coupled to the sensing structure. The sensor bond pads include a top metal layer on a metal diffusion barrier layer including a metal diffusion barrier layer sidewall. Bond wires couple the sensor bond pads to the substrate bond pads. A housing including sides and a top portion is around the flow sensor and includes a flow channel having an inlet and an outlet. A multi-layer corrosion protection coating includes a nm scale adhesion layer and a self assembled monolayer (SAM) is on the adhesion layer. The protection coating covers the sensor bond pads including the metal diffusion barrier layer sidewall. | 08-02-2012 |
20120260727 | DIESEL PARTICULATE FILTER FLOW RATE MEASURING APPARATUS AND METHOD - A particulate filter is provided. The particulate filter includes: a plurality of sensors located in the filter; and a controller operatively connected to the sensors to determine a relative flow velocity over the sensors. A method for detecting obstructions in a filter may also be provided. The method may include: locating a sensor in a zone within a filter; connecting the sensor to a controller; monitoring the sensor with the controller; and determining whether the zone is obstructed based on data received from the sensor. | 10-18-2012 |
20130125644 | Hot-Wire Sensor of Submillimeter Size and Associated Method of Production - The invention relates to a submillimeter-sized hot-wire sensor ( | 05-23-2013 |
20150308873 | MASS FLOWMETER - A temperature-sensitive mass flowmeter includes a detecting element, a signal receiving element, and a signal processing element. The detecting element includes a first sensing element and a second sensing element. The first sensing element and the second sensing element are each a nanotube composite wire. The carbon nanotube composite wire includes a carbon nanotube wire and a metal layer. The carbon nanotube wire includes a plurality of carbon nanotubes spirally arranged along an axial direction of the carbon nanotube wire and the metal layer is coated on a surface of the carbon nanotube wire. | 10-29-2015 |
20150309067 | HOT WIRE ANEMOMETER - A hot wire anemometer utilizing metal-coated carbon naonotube wire includes a detecting element, a signal enlarging element, a signal dealing element, and a display divice. The hot wire of the detecting element includes a nanotube composite wire. The carbon nanotube composite wire includes a carbon nanotube wire and a metal layer. The carbon nanotube wire includes a plurality of carbon nanotubes spirally arranged along an axial direction of the carbon nanotube wire. The diameter of the carbon nanotube wire ranges from 50 nanometers to 30 micrometers. The rate of twist of the carbon nanotube wire ranges from 250 t/cm to 300 t/cm. The metal layer is coated on a surface of the carbon nanotube wire. The thickness of the metal layer ranges from 50 nanometers to 5 micrometers. | 10-29-2015 |
20160178420 | THERMAL MASS FLOW METER AND MASS FLOW CONTROLLER | 06-23-2016 |