Class / Patent application number | Description | Number of patent applications / Date published |
073100340 | With signal processing, span or set point adjustment (e.g., zero correction) | 19 |
20080295568 | SYSTEM AND METHOD FOR AUTOMATED CALIBRATION OF A FUEL FLOW METER IN A FUEL DISPENSER - Methods, systems, and computer program products for using a reference meter to provide automated calibration for a fuel dispenser are disclosed. According to one method, first historical metering data associated with a fuel flow meter and second historical metering data associated with a reference meter are maintained within a memory. The first historical metering data is compared with the second historical metering data. It is determined whether a difference exists between the first historical metering data and the second historical metering data that can be corrected by calibration of the fuel flow meter. In response to determining that a difference exists between the first historical metering data and the second historical metering data that can be corrected by calibration of the fuel flow meter, an automated calibration of the fuel flow meter is performed. | 12-04-2008 |
20090056410 | Self diagnostic measurement method to detect microbridge null drift and performance - A self-diagnostic measurement method to detect microbridge null drift and performance. An ASIC can be designed to include a self-diagnostic feature that automatically occurs at start up or upon command in Normal Operation whereby the temperature compensated microbridge null can be measured in a state of very low thermal energy and allows for the tracking of microbridge null stability versus time. An Airflow Combi-Sensor ASIC (Heimdal) with its strategic partner ZMD can be developed and can be implemented in the form of a self-diagnostic feature that occurs when power is first applied to the ASIC or upon command. When the self-diagnostic is initiated, power is removed and after the electronics have settled, a small power can be applied to the microbridge to measure the bridge null with reduced sensitivity to flow due to self-heating. | 03-05-2009 |
20100043521 | METER PROVING METHOD AND SYSTEM - A meter proving method and system. At lease some of the illustrative embodiments are methods comprising establishing a prover time by a prover device, measuring a flow rate of a fluid with a flow meter that uses multiple measurements taken over a period of time to produce each individual flow rate value (the flow meter electrically coupled to the prover device), and generating a meter volume over the prover time based on the flow rate. The generating the meter volume based on the flow rate does not involve: generating a pulse train output signal by the flow meter; and generating the meter volume based on an attribute of the pulse train. | 02-25-2010 |
20100071438 | METHOD AND APPARATUS FOR CALIBRATING MASS FLOW CONTROLLERS - A method for determining the flow rate of a gas includes measuring a first concentration of a calibration gas provided to the process chamber at a first pressure and temperature by directing infrared radiation into the process chamber and monitoring a first amount of infrared radiation absorbed by the calibration gas. A mixture of a second gas and the calibration gas is provided to the process chamber while maintaining the first pressure and temperature. A second concentration of the calibration gas in the mixture is measured by directing infrared radiation into the process chamber and monitoring a second amount of infrared radiation absorbed by the calibration gas. A flow rate of the second gas is calculated by comparing the first and second concentrations of the calibration gas. In one embodiment, the calibration gas and the second gas may not absorb the infrared radiation at the same wavelength. | 03-25-2010 |
20100307220 | FLOWMETER CALIBRATION TECHNIQUES - Descriptions are provided for implementing flowmeter zeroing techniques. In operating a flowmeter, it may be the case that, if not properly calibrated, the flowmeter will produce erroneous measurements, e.g., will indicate a non-zero flow during a period of zero flow. By determining a magnitude of such erroneous measurements, calibration values may be determined, which may later be used to adjust a measurement that is output by the flowmeter and thereby improve an accuracy of the flowmeter. Such calibration values may be determined for a plurality of operational conditions associated with the flowmeter, such as densities of materials being measured, and/or configurations of flow elements associated with transporting material to the flowmeter. Then, the calibration values may be correlated with the relevant operational conditions, and stored for later use. In this way, during an actual operation of the flowmeter, a number of calibration values may be made available, and an optimal calibration value may be selected for an existing operational condition of the flowmeter. | 12-09-2010 |
20110259077 | CORIOLIS FLOWMETER WITH ZERO CHECKING FEATURE - Descriptions are provided for implementing flowmeter zero checking techniques. In operating a flowmeter, it may be the case that, even if previously calibrated, the flowmeter will produce erroneous measurements, e.g., will indicate a non-zero flow during a period of zero flow. Therefore, zero checking features are provided that allow for fast and accurate determinations of the zero-flow values, for use in adjusting later measurements. The zero-checking features include a button attached to an exterior of a flowmeter, so that it is easily accessible to an operator of the flowmeter. The button, in conjunction with an internal zero checking system, allows for a display of a zero value in response to a request from the operator of the flowmeter. | 10-27-2011 |
20120055229 | METHOD AND APPARATUS FOR DETERMINING A FLOW RATE ERROR IN A VIBRATING FLOW METER - A method for determining an error in a flow rate of a fluid flowing through a vibrating flow meter is provided. The method includes the step of receiving sensor signals from the vibrating flow meter. A first flow rate is determined using the sensor signals. A fluid density is determined. A fluid velocity is determined using the first flow rate, the fluid density, and a physical property of the flow meter. A flow parameter, V/p is calculated based on the fluid velocity and the density. A flow rate error is then determined based on the calculated flow parameter. | 03-08-2012 |
20120210768 | Calibration Tube for Multiphase Flowmeters - A device for automated calibration of a multiphase flowmeter comprising a tube for trapping a multiphase sample along with three ultrasound (US) transducers is described herein. The calibration device is placed vertically, using two valves the tube traps a sample of the liquid in the tube. Then, once the three phases of the liquid separate, the ultrasound transmitters are used to determine the phase fractions of each phase. | 08-23-2012 |
20140000339 | METHOD OF ULTRASONIC FLOW MEASUREMENT AND DEVICE FOR THE IMPLEMENTATION OF THE METHOD | 01-02-2014 |
20140083159 | SELF-CALIBRATING MECHANISM AND SELF-CALIBRATING METHOD FOR FLOW RATE SENSOR, AND DIAGNOSTIC MECHANISM AND DIAGNOSTIC METHOD FOR FLUID SENSOR - A valve fully closing part; a calibrating volume calculation part that calculates a calibrating volume on the basis value of an integration of a flow rate measured value outputted from a flow rate sensor in a fluid parameter changing interval; and a calibration part that calibrates a flow rate on the basis of the calculated calibrating volume and a preset reference volume are provided. | 03-27-2014 |
20140109645 | DETERMINATION OF REFERENCE VALUES FOR ULTRASONIC FLOW METERING SYSTEMS - Apparatus and method for monitoring flow meter operation. In one embodiment, a flow metering system includes a flow meter and a condition monitor. The flow meter is configured to measure the volume of fluid flowing through the flow meter. The condition monitor is coupled to the flow meter is and configured to monitor a parameter of operation of the flow meter, and to record values of the parameter over a predetermined time interval. The condition monitor is further configured to determine reference values for the parameter based on the recorded values, and to apply the reference values to values of the parameter acquired after the predetermined time interval to validate operation of the flow metering system. | 04-24-2014 |
20140260513 | ON-TOOL MASS FLOW CONTROLLER DIAGNOSTIC SYSTEMS AND METHODS - Mass flow controllers with on-tool diagnostic capabilities and methods for on-tool diagnosis of mass flow controllers are disclosed herein. One disclosed method includes providing current to two heating-sensing elements of a mass flow sensor and modifying current through at least one of the heating-sensing elements. Reference data is obtained that characterizes proper operation of the mass flow sensor, and one or more flow sensor signals from the mass flow sensor are analyzed in connection with the reference data to assess whether the mass flow sensor is operating properly. | 09-18-2014 |
20140318212 | CORIOLIS FLOWMETER WITH ZERO CHECKING FEATURE - Descriptions are provided for implementing flowmeter zero checking techniques. In operating a flowmeter, it may be the case that, even if previously calibrated, the flowmeter will produce erroneous measurements, e.g., will indicate a non-zero flow during a period of zero flow. Therefore, zero checking features are provided that allow for fast and accurate determinations of the zero-flow values, for use in adjusting later measurements. The zero-checking features include a button attached to an exterior of a flowmeter, so that it is easily accessible to an operator of the flowmeter. The button, in conjunction with an internal zero checking system, allows for a display of a zero value in response to a request from the operator of the flowmeter. | 10-30-2014 |
20140352399 | Method of In Line Verification of a Flow Meter - A method of in line verification of a flow meter installed in a flow line by means of one or two ultrasonic clamp on flow meters to be installed in line with the flow meter u | 12-04-2014 |
20150323374 | ULTRASONIC FLOW METER AND ULTRASOUND ABSORBING BODY FAULT EVALUATING METHOD - An ultrasonic flow meter includes: a first ultrasound transceiving portion provided on an outer periphery of an upstream side of piping; a second ultrasound transceiving portion provided on an outer periphery of a downstream side of the piping; a flow rate calculating portion that calculates a flow rate of a fluid based on time until a reception, by the second ultrasound transceiving portion, of an ultrasound transmitted by the first ultrasound transceiving portion and time until a reception, by the first ultrasound transceiving portion, of an ultrasound transmitted by the second ultrasound transceiving portion; an ultrasound absorbing body provided on an outer periphery of the piping; a piping-propagated wave identifying portion; an attenuation status value calculating portion; and a fault evaluating portion that evaluates that a fault has occurred in the ultrasound absorbing body. | 11-12-2015 |
20150377690 | CALIBRATION OF GRAIN MASS MEASUREMENT - A method of calibrating a mass flow sensor while harvesting grain includes sensing an accumulated mass of a portion of grain within the grain tank with a first sensor. A mass flow rate sensor is calibrated based at least in part on a signal of the first sensor. | 12-31-2015 |
20160003686 | INTAKE AIR TEMPERATURE SENSOR AND FLOW MEASUREMENT DEVICE - An object of the present invention is to provide a compact and highly accurate intake air temperature sensor by integrating a fixed resistor, connected in series to a temperature sensing element, into an integrated circuit and dispensing with a reference resistor or a changeover switch for connecting the fixed resistor to this reference resistor. The intake air temperature sensor has a temperature sensing element whose resistance value varies with the intake temperature; an integrated circuit electrically connected to the temperature sensing element; a resistive element connected in series to the temperature sensing element; a writable memory that stores correction information corresponding to the resistance value of the resistive element; and a correction processing unit that corrects errors based on the resistance value of the resistive element, which are included in output signals of the temperature sensing element, on the basis of the correction information stored in the writable memory. | 01-07-2016 |
20160069731 | Ultrasonic Flowmeter and Method for Measuring Flow - Objective: To offer an ultrasonic flow meter capable of accurately measuring the flow of a fluid. | 03-10-2016 |
20160377467 | A SYSTEM FOR IDENTIFYING A SENSOR AND MEASURING FLOW IN A FLOW DUCT - A system or a method for measuring flow of fluid or gas, has a flow duct with at least two transducers which generate at least one beam of ultrasound in the flow duct in which ultrasound transducers are placed in a fixed positions in a duct for flowing air where the electronic device for analyzing signal from the transducers is performed in a handheld device. A transmitter circuit is permanently connected to the transducers and a receiver circuit is placed in a handheld device. The transmitter circuit has calibration data representing the actual placement of the transducers in relation to the actual duct, which calibration data is communicated by every connection to the receiver circuit. Hereby can be achieved that transducers can be permanently placed in ventilation ducts in buildings, where placement of ultrasound transducers for measurement and for calibration of measurement of an air stream is nearly impossible. | 12-29-2016 |