Patent application number | Description | Published |
20100095783 | In-line measuring device - An in line measuring device, includes a measuring transducer having: a least one measuring tube vibrating, during operation, and serving for conveying, a two- or multiphase, flowable medium; an exciter mechanism for producing vibrations of the at least one measuring tube; a sensor arrangement for registering vibrations of the measuring tube and for delivering an oscillation measurement signal representing oscillations of the measuring tube, and a measuring device electronics electrically coupled with the measuring transducer. The measuring device electronics delivers, at least one exciter signal driving the exciter mechanism, and, in such a manner that the at least one measuring tube, during operation,—driven by the exciter mechanism driven by means of the at least one exciter signal—is excited, to execute vibrations in a wanted mode of the measuring transducer, in which it, at least partially, executes bending oscillations about an imaginary bending oscillation axis of the measuring transducer, Moreover, the measuring device electronics ascertains, a damping value of first type, which represents, instantaneously, a damping of vibrations of the at least one measuring tube, which opposes the bending oscillations of the at least one measuring tube corresponding to the Coriolis mode. | 04-22-2010 |
20100095784 | In-line measuring device - An inline measuring device, includes a measuring transducer having: at least one measuring tube vibrating, during operation, and serving for conveying, at least at times, a two- or multiphase, flowable medium; an exciter mechanism for producing vibrations of the measuring tube; and a sensor arrangement for registering vibrations of the measuring tube and for delivering oscillation measurement signal representing oscillations of the measuring tube. Measuring device electronics electrically coupled with the measuring transducer. The measuring device electronics delivers, at least one exciter signal driving the exciter mechanism, and, ascertains a damping value of a first type, which represents, instantaneously, a damping of vibrations of the at least one measuring tube induced by medium conveyed in the at least one measuring tube and antisymmetric with reference to an imaginary central plane of the at least one measuring tube coplanar with a cross section of the measuring tube, and/or which represents, instantaneously, a damping of vibrations of the at least one measuring tube induced by medium conveyed in the at least one measuring tube. | 04-22-2010 |
20100095785 | In-line measuring device - An in line measuring device, includes a measuring transducer of the vibration-type having: at least one measuring tube vibrating, at least at times, during operation, and serving for conveying, at least at times, a two- or multiphase, flowable medium; an exciter mechanism acting on the measuring tube for producing vibrations of the at least one measuring tube; and a sensor arrangement for registering vibrations of the at least one measuring tube and for delivering at least one oscillation measurement signal representing oscillations of the measuring tube. The in line measuring device further includes measuring device electronics electrically coupled with the measuring transducer. The measuring device electronics delivers, at least at times, at least one exciter signal driving the exciter mechanism, and, at least at times, ascertains a damping value of first type, which represents a change of damping opposing the vibrations of the measuring tube within a predeterminable time interval. | 04-22-2010 |
20100281998 | Method for detecting blockage in a cariolis flow measuring device - A method for detecting blockage of a measuring tube of a Coriolis flow measuring device, which has at least two measuring tubes. For this, the at least two measuring tubes are excited by at least one exciter to execute mechanical oscillations, mechanical oscillations of the measuring tubes are registered by at least one sensor and at least one measurement signal representing the mechanical oscillations is produced. At least one produced measurement signal is analyzed for the occurrence of a deviation of a resonance frequency of one measuring tube relative to a resonance frequency of the at least one other measuring tube. In case such a deviation occurs, blockage of a measuring tube is established. | 11-11-2010 |
20110113896 | Measuring system with a tube arrangement having two measuring tubes flowed through in parallel, as well as method for monitoring the arrangement - For monitoring the tube arrangement, the measuring system of the invention includes, connected to the transmitter electronics, a temperature measuring arrangement having a first temperature sensor for producing a temperature signal dependent on a temperature of a first of the measuring tubes of the tube arrangement and at least a second temperature sensor for producing a temperature signal dependent on a temperature of a second of the measuring tubes of the tube arrangement. In the method of the invention, it is provided that, in the case of medium flowing through the tube arrangement, a temperature difference existing between the at least two measuring tubes as a result plugging is ascertained and, in case the ascertained temperature difference deviates from a predetermined limit value for the temperature difference representing a non-plugged tube arrangement, a partial plugging of the tube arrangement, especially a plugging of exactly one of the measuring tubes, is signaled. | 05-19-2011 |
20120042732 | MEASURING SYSTEM HAVING A MEASURING TRANSDUCER OF VIBRATION-TYPE - A measuring system comprises: a measuring transducer of vibration type, through which fluid flows during operation, and which produces oscillation signals corresponding to parameters of the flowing fluid; as well as a transmitter electronics (TE), which is electrically coupled with the measuring transducer, and serves for activating the measuring transducer and for evaluating oscillation signals delivered by the measuring transducer. The measuring transducer (MT) includes: At least one measuring tube ( | 02-23-2012 |
20120060626 | METHOD FOR DETECTING PLUGGING IN A CORIOLIS FLOW MEASURING DEVICE - A method for detecting complete or partial plugging of a measuring tube of a Coriolis flow measuring device, which is insertable into a pipeline, and which has a measuring transducer of the vibration type having at least two measuring tubes connected for parallel flow. The method includes, in such case, the steps of measuring a subset flow occurring in a subset of the measuring tubes, and comparing a subset flow value obtained from this measurement with a reference value to be expected for this subset. The reference value is, in such case, determined from a total mass flow determined in the context of a Coriolis mass flow measuring. Additionally, the method includes the step of detecting plugging of at least one measuring tube of the measuring transducer, if the subset flow value deviates from the reference value by more than a limit value. | 03-15-2012 |
20120090407 | MEASURING SYSTEM HAVING A MEASURING TRANSDUCER OF VIBRATION-TYPE - A measuring system comprises: a measuring transducer for producing oscillation measurement signals; and transmitter electronics electrically coupled with the measuring transducer for activating the measuring transducer and for evaluating oscillation measurement signals delivered by the measuring transducer. The measuring transducer includes: a transducer housing, a first housing end housing end, first flow divider having exactly four flow openings, an outlet-side, second housing end formed by means of an outlet-side, second flow divider having exactly four flow openings mutually spaced from one another, and a tube arrangement having exactly four, straight, measuring tubes forming flow paths arranged for parallel flow and connected to the flow dividers, an electromechanical exciter mechanism for producing and/or maintaining mechanical oscillations of the four measuring tubes and a vibration sensor arrangement reacting to vibrations of the measuring tubes. | 04-19-2012 |
20120123705 | Measuring system having a measuring transducer of vibration-type - A measuring system comprises: a measuring transducer; transmitter electronics; at least one measuring tube; and at least one oscillation exciter. The transmitter electronics delivers a driver signal for the at least one oscillation exciter, and for feeding electrical, excitation power into the at least one oscillation exciter. The driver signal, has a sinusoidal signal component which corresponds to an instantaneous eigenfrequency, and in which the at least one measuring tube can execute, or executes, eigenoscillations about a resting position. The eigenoscillations have an oscillation node and in the region of the wanted, oscillatory length exactly one oscillatory antinode. The driver signal has, a sinusoidal signal component with a signal frequency, which deviates from each instantaneous eigenfrequency of each natural mode of oscillation of the at least one measuring tube, in each case, by more than 1 Hz and/or by more than 1% of said eigenfrequency. | 05-17-2012 |
20120222479 | METHOD FOR DETECTING PLUGGING IN A CORIOLIS FLOW MEASURING DEVICE - A method for detecting plugging of a measuring tube. Heat is supplied to a medium conveyed in a first measuring tube by means of at least one heating element, or heat is removed from the medium conveyed in a first measuring tube by means of at least one cooling element. At least one temperature sensor, which is thermally coupled to the medium conveyed in the first measuring tube, temperature is registered. Additionally, a first comparison variable, which is characteristic for heat transport by the medium in the first measuring tube, is determined based on the supplying of heat or removing of heat, as well as on the temperature registering, and this comparison variable is compared with a reference variable. Plugging of at least one measuring tube of the measuring transducer is detected if the first comparison variable deviates from the reference variable by more than a limit value. | 09-06-2012 |
20130031973 | METHOD FOR DETECTING ACCRETION OR ABRASION IN A FLOW MEASURING DEVICE - A method for detecting accretion or abrasion on a first measuring tube of a flow measuring device. A first temperature as a function of time is registered via a first temperature sensor, which is arranged on the first measuring tube in such a manner that, between the first temperature sensor and the medium, at least one measuring tube wall of the first measuring tube is embodied. Parallel in time, a second reference temperature as a function of time is registered by a second temperature sensor, which is spaced from the first temperature sensor and thermally coupled to the medium. Therefrom, at least one variable characteristic is determined, and accretion or abrasion on the first measuring tube is detected, if the at least one determined characteristic variable or a variable derived therefrom deviates by more than a limit value from a predetermined reference variable. | 02-07-2013 |
20130291652 | Measuring transducer of vibration-type - A measuring transducer serves for producing vibration signals corresponding to parameters of a flowing medium comprises a measuring transducer housing having housing ends and, extending within the measuring transducer housing between its housing ends, a tube arrangement formed by means of at least two tubes. Of the two tubes, at least one tube serves as a measuring tube conveying flowing medium and the other tube is mechanically connected with the tube by means of a first coupling element to form an inlet-side coupling zone and by means of a second coupling element to form an outlet-side coupling zone. At least the first coupling element has in a region extending between the tubes a slit having at least one closed end. Slit has a maximal slit width and a maximal slit length, which is greater than the maximal slit width. Placed partially within the slit is a connecting element, which contacts a slit edge enclosing said slit. | 11-07-2013 |