Electron vibratory measurement system for measuring mass flow rate

Abstract

The invention relates to a measuring system comprising a measuring and operating electronics unit (ME) and a transducer device electrically connected thereto. The transducer device (MW) has at least one tube through which fluid flows during operation and is caused to vibrate simultaneously; a vibration exciter (41); two vibration sensors (51, 52) on the inlet and outlet sides respectively , for generating vibration signals (s1, s2); and, two temperature sensors (71, 72) on the inlet and outlet sides, respectively, for generating temperature measurement signals (θ1, θ2), the measuring and operating electronics unit (ME) is thermally conductively coupled to the wall of the tube. A measuring and operating electronics unit (ME) is electrically connected to each vibration sensor (51, 52) and also to each temperature sensor (71, 72) and to at least one vibration exciter (41). The measuring and operating electronics unit (ME) is designed to feed electrical energy into at least one vibration exciter (41) in order to achieve a mechanical vibration of the tube (11) by means of an electrical excitation signal (e1). Furthermore, the measuring and operating electronics unit (ME) is designed to generate a mass flow sequence (X m )—that is, a series of time-sequential mass flow measurements (x m,i ), which represents the instantaneous mass flow rate (m) of the fluid such that at least for the reference mass flow rate (m ref )—that is, the specified mass flow rate of the reference fluid flowing through the transducer device, the mass flow measurement value (x m,i →x m,ref ) has nothing to do with the temperature difference.

Description

technical field [0001] The invention relates to an electro-vibratory measurement system, in particular for measuring physical measurement variables of fluids flowing in pipelines. Background technique [0002] In industrial measurement and automation technology, electro-vibration measuring systems - i.e. measuring systems formed by means of electro-vibration transducer devices - are frequently used for the highly accurate determination of the measurement of at least one physically measured variable of a fluid flowing in a pipeline value, the at least one physically measured variable is eg a material parameter such as density and / or a flow parameter such as mass flow rate of a gas, liquid or dispersion. In particular, an electro-vibration measurement system is established in this aspect, wherein the transducer device comprises at least one tube comprising an inner cavity surrounded by a generally metallic wall, wherein an inlet-side first end extends to an outlet Said tube a...

AI Technical Summary

Problems solved by technology

For this reason, the measurement system has additional but expensive valve controls and additional supply and return fluid lines

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