| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073861010 | With indirect temperature or density compensation | 26 |
| 20090038405 | Measuring system for a medium flowing in a process line - A measuring system for measuring a density of a medium flowing in a process line along a flow axis of the measuring system in the case of a medium which is variable as regards a thermodynamic state, especially a medium which is, at least in part, compressible. Included are: at least one temperature sensor placed at a temperature measuring point, reacting primarily to a local temperature, θ, of medium flowing past, and delivering at least one temperature measurement signal influenced by the local temperature of the medium to be measured; at least one pressure sensor placed at a pressure measuring point, reacting primarily to a local, especially a static, pressure, p, of medium flowing past, and delivering at least one pressure measurement signal influenced by the local pressure, p, in the medium to be measured; as well as a measuring electronics communicating, in each case, at least at times, with the temperature sensor and the pressure sensor. The measuring electronics ascertains, with application both of the temperature measurement signal as well as also at least the pressure measurement signal, a provisional density measured value, which represents a density, which the flowing medium only apparently has at a virtual density measuring point, especially a virtual density measuring point predeterminably spaced from the pressure measuring point and/or the temperature measuring point along the flow axis. Additionally, the measuring electronics produces, with application of the provisional density measured value as well as at least density correction value determined at run-time and dependent both on a flow velocity of the medium as well as also on the local temperature reigning at the temperature measuring point, at least at times, at least one density measured value, especially a digital density measured value, differing from the provisional density measured value and instantaneously more accurately representing than the provisional density measured value a local density, ρ, which the flowing medium actually has at the virtual density measuring point. | 02-12-2009 |
| 20090038406 | Measuring system for a medium flowing in a process line - A measuring system for measuring a density of a medium flowing in a process line along a flow axis of the measuring system in the case of a medium which is variable as regards a thermodynamic state, especially a medium which is, at least in part, compressible. The measuring system includes at least one temperature sensor placed at a temperature measuring point, reacting primarily to a local temperature, θ, of medium flowing past, and delivering at least one temperature measurement signal influenced by the local temperature of the medium to be measured; at least one pressure sensor placed at a pressure measuring point, reacting primarily to a local, especially a static, pressure, p, of medium flowing past, and delivering at least one pressure measurement signal influenced by the local pressure, p, in the medium to be measured; as well as a measuring electronics communicating, in each case, at least at times, with the temperature sensor and the pressure sensor. The measuring electronics produces, with application both of the temperature measurement signal as well as also at least the pressure measurement signal, at least at times, at least one density measured-value, especially a digital, density measured-value, representing, instantaneously, a local density, ρ, which the flowing medium has at a virtual density measuring point, especially a locationally fixed, virtual density measuring point, predeterminably spaced from the pressure measuring point and/or from the temperature measuring point, along the flow axis. | 02-12-2009 |
| 20120160032 | VORTEX FLOWMETER WITH OPTIMIZED TEMPERATURE DETECTION - Exemplary embodiments relate to a vortex flowmeter having a vortex body which projects into the flowing measurement medium in a measuring tube, a sensor for detecting the vortex frequency being connected downstream of said vortex body in the direction of flow and being provided with means for measuring the temperature of the measurement medium, and a downstream electronic evaluation unit determining the flow rate in a temperature-compensated manner, the sensor including a carrier body on which a plurality of piezoelectric elements, which are arranged at a distance from one another and are intended to measure the frequency, and a temperature-measuring element are placed. | 06-28-2012 |
| 20120285259 | FLOW METER - A simple, passive and rugged device for measuring the flow rate of liquid. A variable area obstruction valve, a differential pressure sensor and a densitometer are combined in a single housing to provide for a highly accurate and precise measure of mass flow. | 11-15-2012 |
| 20120325012 | FLOW METER WITH DIGITAL TEMPERATURE COMPENSATION - A flow meter is disclosed, which composes an operational amplifier, a digital potentiometer, a sensor coil, and fixed resistors R | 12-27-2012 |
| 20130091958 | ULTRASONIC FLOW RATE MEASUREMENT DEVICE - An ultrasonic flow rate measurement device capable of sensing and correcting a temperature without use of a sensor specifically designed for measuring a temperature is provided. The ultrasonic flow rate measurement device includes a first ultrasonic transducer and a second ultrasonic transducer that re disposed in a flow volume measurement block and arranged in such a way that ultrasonic waves are transmitted from one transducer and received by the other transducer; a counter for measuring a propagation time consumed for exchanging the ultrasonic waves between the first ultrasonic transducer and the second ultrasonic transducers; a flow volume computing block that calculates a flow volume from a measurement value of the counter; an oscillation circuit used as a time counter when the counter calculates the propagation time; and a temperature sensing block for sensing a temperature by utilization of a frequency change attributable to a temperature of the oscillation circuit. | 04-18-2013 |
| 20130255399 | COMPENSATING FOR FREQUENCY CHANGE IN FLOWMETERS - Motion is induced in a conduit that contains a fluid. The motion is induced such that the conduit oscillates in a first mode of vibration and a second mode of vibration. The first mode of vibration has a corresponding first frequency of vibration and the second mode of vibration has a corresponding second frequency of vibration. At least one of the first frequency of vibration or the second frequency of vibration is determined. A phase difference between the motion of the conduit at a first point of the conduit and the motion of the conduit at a second point of the conduit is determined. A quantity based on the phase difference and the determined frequency is determined. The quantity includes a ratio between the first frequency during a zero-flow condition and the second frequency during the zero-flow condition. A property of the fluid is determined based on the quantity. | 10-03-2013 |
| 20140260658 | FLOWMETER PRIMARY ELEMENT WITH SENSORS - A process variable transmitter is configured as a flowmeter for measuring flow of a process fluid through a conduit. The transmitter includes a pitot tube extending into the conduit which creates a differential pressure in the process fluid due to flow of the process fluid. An upstream process variable sensor is mounted on the pitot tube and coupled to the flow of process fluid to sense an upstream process variable of the process fluid. A downstream process variable sensor is mounted on the pitot tube downstream of the upstream process variable sensor and coupled to the flow of process fluid to sense a downstream process variable of the process fluid. Measurement circuitry determines the flow of the process fluid based upon the upstream process variable and the downstream process variable. | 09-18-2014 |
| 20140298919 | FLOW SENSOR WITH IMPROVED LINEAR OUTPUT - A flow sensor assembly includes a flow sensor for sensing a flow parameter. The flow sensor may provide a flow sensor output signal that is related to the sensed parameter. A control block operatively connected to the flow sensor may receive a measure related to the flow rate of the fluid stream and drive the heater of the flow sensor to a heater temperature, such that the heater temperature may be dependent on the flow rate of the fluid stream, which causes the analog output of the flow sensor to be relatively linear over an expected operating range of flow rates. | 10-09-2014 |
| 20150346006 | FLOWMETER PRIMARY ELEMENT WITH SENSORS - A process variable transmitter is configured as a flowmeter for measuring flow of a process fluid through a conduit. The transmitter includes a pitot tube extending into the conduit which creates a differential pressure in the process fluid due to flow of the process fluid. An upstream process variable sensor is mounted on the pitot tube and coupled to the flow of process fluid to sense an upstream process variable of the process fluid. A downstream process variable sensor is mounted on the pitot tube downstream of the upstream process variable sensor and coupled to the flow of process fluid to sense a downstream process variable of the process fluid. Measurement circuitry determines the flow of the process fluid based upon the upstream process variable and the downstream process variable. | 12-03-2015 |
| 20160091354 | ULTRASONIC FLOW METERING USING COMPENSATED COMPUTED TEMPERATURE - Apparatus and methods for verifying temperature measurements in an ultrasonic flow meter. An ultrasonic flow metering system includes a passage for fluid flow, a temperature sensor, an ultrasonic flow meter, and a flow processor. The temperature sensor is disposed to provide measured temperature of fluid flowing in the passage. The ultrasonic flow meter is configured to measure transit time of an ultrasonic signal through the fluid. The flow processor is configured to 1) compute speed of sound through the fluid based on the transit time; 2) calculate a computed temperature of the fluid based on the speed of sound; 3) apply compensation, based on a historical difference between the computed temperature and the measured temperature, to a temperature verification parameter; and 4) determine, based on the temperature verification parameter, whether a current difference between the measured temperature and the computed temperature is within a predetermined range. | 03-31-2016 |
| 20160146653 | MASS FLOW MEASUREMENT APPARATUS AND METHOD - Apparatus for providing a mass flow measurement in respect of a fluid flowing in a conduit ( | 05-26-2016 |
| 20160195415 | ABSOLUTE AND DIFFERENTIAL PRESSURE TRANSDUCER | 07-07-2016 |
| 073861020 | Electrical | 13 |
| 20090049925 | Measuring system for a medium flowing in a process line - A measuring system serves for measuring a density of a medium flowing in a process line along a flow axis of the measuring system in the case of a medium which is variable as regards a thermodynamic state, especially a medium which is, at least in part, compressible. The measuring system includes at least one temperature sensor placed at a temperature measuring point, reacting primarily to a local temperature, θ, of medium flowing past, and delivering at least one temperature measurement signal influenced by the local temperature of the medium to be measured; at least one pressure sensor placed at a pressure measuring point, reacting primarily to a local, especially a static, pressure, p, of medium flowing past, and delivering at least one pressure measurement signal influenced by the local pressure, p, in the medium to be measured; as well as a measuring electronics communicating, in each case, at least at times, with the temperature sensor and the pressure sensor. The measuring electronics produces, at least at times, with application both of the temperature measurement signal as well as also at least the pressure measurement signal, as well as with application of at least one numerical compensation factor, especially a digitally stored compensation factor, at least at times, at least one density measured-value, especially a digital, density measured-value, representing, instantaneously, a local density, ρ, which the flowing medium has at a virtual density measuring point, especially a virtual density measuring point predeterminably spaced from the pressure measuring point and/or from the temperature measuring point, along the flow axis. The compensation factor (K) corresponds with a locational variability of at least one thermodynamic variable of the medium, especially a temperature, a pressure or a density, occurring along the flow axis of the measuring system, especially as ascertained in advance and/or during operation, and/or corresponds with a locational variability of the Reynolds number of the flowing medium along the flow axis of the measuring system, especially as ascertained in advance and/or during operation. | 02-26-2009 |
| 20090120202 | Agricultural working machine - A measuring device for measuring components of a crop material is installed on an agricultural machine and includes at least one conductance sensor, determining the component “moisture content”, which is determined via the temperature-compensated detection of conductance. In this manner it is ensured that the measuring device delivers reliable measurement results for determining the components of a crop material even under fluctuating measuring conditions. | 05-14-2009 |
| 20130055826 | MEMS AIRFLOW SENSOR DIE INCORPORATING ADDITIONAL CIRCUITRY ON THE DIE - A MEMS airflow sensor die having a heater control circuit, differential instrumentation amplifier, temperature compensation, and/or offset correction circuitry integrated with an airflow sensor on the MEMS die. The added circuitry may be placed on space available on the basic airflow die with MEMS fabrication techniques without enlarging the sensor die. The die with the added circuitry may result in a device having a reduced form factor, improved reliability and lower cost. | 03-07-2013 |
| 20130081477 | FLOW METER DEVICE - In a flow meter device of the present invention, a control means causes a temperature measuring means to singly measure a temperature of a fluid. A flow compensation means calculates a temperature of a fluid from a propagation time and makes compensation for the flow rate using the temperature calculated based on the propagation time in a state in which the temperature is not measured by the temperature measuring means. Thus, when compensation is made for the measured flow rate to derive a flow rate at a desired temperature, flow rate compensation can be implemented with high accuracy, versatility of a target fluid can be improved, and low electric power consumption can be achieved. | 04-04-2013 |
| 20130152699 | Gas Flow Rate Measurement Device - Provided is a highly accurate, highly reliable gas flow rate measurement device that provides an enlarged temperature range over which the resolution at a high temperature and at a low temperature can be increased to achieve high accuracy no matter whether the characteristics of a gas temperature detection element are nonlinear. The gas flow rate measurement device includes a plurality of resistors that are disposed in a gas flow path, a gas flow rate detection circuit that outputs a gas flow rate detection signal in accordance with the flow rate of a gas flowing in the gas flow path by detecting a current flowing in the resistors or by detecting a voltage generated in accordance with the current, and a gas temperature detection element | 06-20-2013 |
| 20130305837 | VIBRATING FLOW METER AND METHOD FOR MEASURING TEMPERATURE - A vibrating flow meter ( | 11-21-2013 |
| 20140069205 | FLOW RATE MEASURING DEVICE - A flow rate measuring device ( | 03-13-2014 |
| 20150082903 | MULTIVARIABLE PROCESS FLUID TRANSMITTER FOR HIGH PRESSURE APPLICATIONS - A multivariable process fluid transmitter module includes a base having a pair of recesses. A pair of pedestals is provided with each pedestal being disposed in a respective recess and being coupled to a respective isolation diaphragm. At least one line pressure assembly is mounted proximate one of the pedestals. The at least one line pressure assembly couples a respective isolation diaphragm to a line pressure sensor. A differential pressure sensor has a sensing diaphragm fluidically coupled to the isolation diaphragms by a fill fluid. At least one additional sensor is disposed to sense a temperature of a process fluid. Circuitry is coupled to the line pressure sensor, the differential pressure sensor, and the at least one additional sensor to measure an electrical characteristic of each of the line pressure sensor, the differential pressure sensor, and the at least one additional sensor. The circuitry is configured to provide an indication of fluid flow based on the measured electrical characteristic of each of the line pressure sensor, the differential pressure sensor and the at least one additional sensor. | 03-26-2015 |
| 20150323357 | ANOMALY FLUID DETECTION - A flowmeter includes a process sensor assembly providing a sensor signal and a filter stage comprising a low pass filter and a high pass filter and providing a filtered signal from the sensor signal. A processor determines that a filtered signal is indicative of a low flow condition for a first fluid, alters at least one parameter of the low pass filter and at least one parameter of the high pass filter in response to the low flow condition such that the filter stage provides a new filtered signal, determines that the new filtered signal is not indicative of a low flow condition for a second fluid and generates an alarm in response to the new filtered signal not being indicative of a low flow condition for the second fluid. | 11-12-2015 |
| 20190145805 | MILK METER | 05-16-2019 |
| 073861030 | Digital | 3 |
| 20090013798 | Measuring system for a medium flowing in a process line - A measuring system for measuring a density of a medium flowing in a process line along a flow axis of the measuring system in the case of a medium which is variable as regards a thermodynamic state, especially a medium which is, at least in part, compressible. The measuring system includes therefor: At least one temperature sensor placed at a temperature measuring point, reacting primarily to a local temperature, θ, of medium flowing past, and delivering at least one temperature measurement signal influenced by the local temperature of the medium to be measured; at least one pressure sensor placed at a pressure measuring point, reacting primarily to a local, especially a static, pressure, p, of medium flowing past, and delivering at least one pressure measurement signal influenced by the local pressure, p, in the medium to be measured; at least one flow sensor placed at a flow measuring point, reacting primarily to a local flow parameter, especially a flow velocity, a volume flow or a mass flow of the medium to be measured, especially also changes of such, especially a flow parameter averaged over a cross section of the process line, and delivering at least one flow measurement signal influenced by the local flow parameter; as well as a measuring electronics communicating, in each case, at least at times, with the temperature sensor and the pressure sensor. The measuring electronics produces, with application both of the temperature measurement signal as well as also the pressure measurement signal, as well as also the flow measurement signal, at least at times, at least one density measured-value, especially a digital, density measured-value, representing, instantaneously, a local density, ρ, which the flowing medium has at a virtual density measuring point, especially a virtual density measuring point predeterminably spaced from the pressure measuring point and/or from the temperature measuring point along the flow axis. | 01-15-2009 |
| 20140190270 | GAS FLOW RATE MEASURING APPARATUS - Gas flow rate measuring apparatus comprising resistive element disposed in a gas flow path, a gas flow rate detection circuit, and a gas temperature detection element or a substrate temperature detection element. The detection circuit detects a current flowing through the resistive element, or a voltage generated in response to the current to output a gas flow rate detection signal in accordance with a flow rate of gas flowing. The apparatus corrects characteristics of the gas flow rate detection signal on the basis of a temperature detection signal obtained from these elements and includes signal conversion means for correcting a characteristic bend displaced by more than a certain fixed amount from target characteristics. | 07-10-2014 |
| 20150292926 | FLOW METER DEVICE AND FLOW RATE CALCULATION METHOD THEREOF - A flow meter device includes: a first vibrator, a second vibrator, a control unit, a timekeeper, and an arithmetic operation unit. The arithmetic operation unit is configured to: determine whether or not a time difference between a propagation time in the forward direction and a propagation time in the reverse direction is less than a predetermined value; calculate a propagation time correction amount based on the time difference if it is determined that the time difference is less than the predetermined value; and calculate a flow rate of the fluid by using the propagation time correction amount. | 10-15-2015 |
