Class / Patent application number | Description | Number of patent applications / Date published |
073861190 | Produced by fluidic oscillator | 10 |
20090000393 | Differential Pressure Measurement Device - There is provided a differential pressure (dP) measurement device for use in flow measurement comprising a first microwave resonator ( | 01-01-2009 |
20090126506 | Method For Determining The Density Of Fluid Media - The actual density of liquids is determined with a flexural oscillator that is excited at two different natural vibrations. The presence of air/gas inclusions or other inhomogeneities in a liquid is detected and their influence can be eliminated. In an initial step, the periods of the inherent vibrations and of at least one vibration damping value of the natural vibrations are determined for liquids having different densities ρ and viscosities. Liquid densities as well as the difference between them and between the vibration damping values are determined from this. An inclusion-free curve (KB) which reflects the functional dependence F(ρδ) between the relative density differences and the vibration damping differences is calculated and the exact function determined; i.e. the gas/air inclusion-free curve (KB) is expanded by introducing a deviation bandwidth (ab) to form an inclusion-free curve area (KF), which is stored. The functional value F(ρδ) of the liquid to be tested is determined and a check is performed to ascertain whether it is within the inclusion-free curve area and whether the resulting value of the density ρ is or is not applicable to the liquid being tested. | 05-21-2009 |
20090173168 | METER - A fluidic oscillator liquid flow meter comprising a body having an inlet portion to receive a flow of liquid to be measured, an outlet portion, a main channel defining a flow path between the inlet and outlet, the flow path including feedback structure to induce oscillations in the flowing fluid, the oscillations being detected by detector comprising means to apply a magnetic field across the flow path and sensing electrodes to detect the resulting e.m.f., the electrodes being positioned such that they protrude from the body into the flow path. A meter having driving signal means, which applies an alternating driving signal to the sensing electrodes, is also disclosed. | 07-09-2009 |
20100139414 | BI-DIRECTIONAL OSCILLATING JET FLOWMETER - A bi-directional flowmeter comprises a first fluidic oscillator device arranged to measure the flow of fluid in a first direction and a second fluidic oscillator device arranged to measure the flow of fluid in a second direction opposite to the first direction and in which the two oscillators devices are connected together in series between an inlet port and an outlet port of the flowmeter between which the fluid to be measured can flow. | 06-10-2010 |
20110005334 | TUNABLE FLUID FLOW CONTROL SYSTEM - A tunable fluid flow control system includes a fluidic oscillator having a movable boundary wall. A pressurized gas source is coupled to the movable boundary wall and configured to supply a stream of pressurized gas to the movable boundary wall to actuate the boundary wall. The boundary wall is actuatable to vary a cavity volume in the fluidic oscillator so as to control frequency of flow of a pulsating fluid generated by the fluidic oscillator. A portion of a fluid is bypassed the fluidic oscillator so as to control amplitude of flow of a pulsating fluid generated by the fluidic oscillator. | 01-13-2011 |
20110094308 | FLUIDIC OSCILLATOR FLOW METER - The present invention discloses a feedback type, hydrodynamic oscillator flow meter for measuring the flow of fluids such as gas, air, water and oil, flowing through a conduit. This flow meter gives very accurate measurements over a long period of time since piezoelectric sensors are employed. The working principle of this flow meter is based on the Coanda Effect, which guides the flowing fluid to pass through two feedback paths ( | 04-28-2011 |
20110154912 | MEASURING SYSTEM HAVING A MEASURING TRANSDUCER OF VIBRATION-TYPE - The measuring system comprises: A measuring transducer of vibration-type, through which medium flows during operation and which produces primary signals corresponding to parameters of the flowing medium; as well as a transmitter electronics electrically coupled with the measuring transducer for activating the measuring transducer and for evaluating primary signals delivered by the measuring transducer. The measuring transducer includes: At least one measuring tube for conveying flowing medium; at least one electro-mechanical, oscillation exciter for exciting and/or maintaining vibrations of the at least one measuring tube; as well as at least a first oscillation sensor for registering vibrations at least of the at least one measuring tube and for producing a first primary signal of the measuring transducer representing vibrations at least of the at least one measuring tube. The transmitter electronics, in turn, delivers at least one driver signal for the exciter mechanism for effecting vibrations of the at least one measuring tube and generates, by means of the first primary signal, as well as with application of a damping, measured value, which represents an excitation power required for maintaining vibrations of the at least one measuring tube, and, respectively, a damping of vibrations of the at least one measuring tube as a result of inner friction in the medium flowing in the measuring transducer, a pressure difference, measured value, which represents a pressure difference occurring between two predetermined reference points in the flowing medium. | 06-30-2011 |
20130042699 | FLUIDIC OSCILLATOR FLOWMETER FOR USE WITH A SUBTERRANEAN WELL - A fluidic oscillator can include a fluid switch, at least two fluid paths from the fluid switch, and a sensor which measures a frequency of fluctuations in flow through the fluidic oscillator. A method of measuring a flow rate of a fluid can include flowing the fluid through a fluidic oscillator, a majority of the fluid flowing alternately via at least two fluid paths from a fluid switch of the fluidic oscillator, and a sensor detecting a frequency of the flow alternating between the fluid paths. Another fluidic oscillator can include a fluid input, at least two fluid paths from the fluid input to respective fluid outputs, whereby a majority of fluid which flows through the fluidic oscillator flows alternately via the fluid paths, and a sensor which detects pressure fluctuations due to the flow alternating between the fluid paths. | 02-21-2013 |
20140000383 | MEASURING TRANSDUCER OF VIBRATION-TYPE FOR A FLUID FLOWING IN A FLEXIBLE HOSE | 01-02-2014 |
20150107369 | METHOD OF, AND APPARATUS FOR, MEASURING THE MASS FLOW RATE OF A GAS - There is provided a meter for measuring the mass flow rate of a gas, the meter comprising a conduit through which the gas flows in use, the conduit having a flow restriction orifice through which choked flow occurs in use, the flow restriction orifice dividing the conduit into an upstream portion upstream of said orifice and a downstream portion downstream of said orifice, the meter further comprising a sensor assembly including a first piezoelectric crystal oscillator in said upstream portion such that said first piezoelectric oscillator is in contact with said gas when the meter in use, a second piezoelectric crystal oscillator in said downstream portion such that said second piezoelectric oscillator is in contact with said gas when the meter in use, said sensor assembly being arranged: to drive the first and second piezoelectric crystal oscillators such that each of the first and second piezoelectric crystal oscillators resonate at respective resonant frequencies; to measure the resonant frequency of the first piezoelectric oscillator and the resonant frequency of resonant frequency of the first piezoelectric oscillator and the the second piezoelectric oscillator; and to determine, from the resonant frequency of the second piezoelectric oscillator, the mass flow rate of gas through said orifice. | 04-23-2015 |