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    VERFAHREN ZUM BETREIBEN EINES MAGNETISCH-INDUKTIVEN DURCHFLUSSMESSGERÄTS
    3.
    发明公开
    VERFAHREN ZUM BETREIBEN EINES MAGNETISCH-INDUKTIVEN DURCHFLUSSMESSGERÄTS 有权
    VERFAHREN ZUM BETREIBEN EINES MAGNETISCH-INDUKTIVENDURCHFLUSSMESSGERÄTS

    公开(公告)号：EP2923182A1

    公开(公告)日：2015-09-30

    申请号：EP14783999.7

    申请日：2014-09-25

    申请人： KROHNE MESSTECHNIK GMBH & CO. KG

    发明人： BILGIC, Attila ,  BROCKHAUS, Helmut ,  NEVEN, Josef ,  SPIEGEL, Christoph

    IPC分类号： G01F1/58

    CPC分类号： G01F1/584 ,  G01F1/58 ,  G01F1/588 ,  G01F1/60

    摘要： The invention relates to a method for operating a magnetic-inductive flow meter for measuring the flow velocity of a flowing medium, comprising a magnetic field generating device having an electromagnet arrangement and a permanent magnet arrangement for generating a magnetic field having magnetic flux densities of different magnitudes in the flowing medium, and having a measuring device comprising a measuring electrode arrangement for measuring the measured voltage which is induced in the flowing medium by the magnetic field and on which a interference voltage is superimposed. According to the invention, a method of the above-described type is specified, in which improved compensation of the interference voltage and power consumption minimization are achieved, specifically in that a measurement cycle composed of a compensation measuring operation and a working measuring operation is carried out, in that during the compensation measuring operation at least a first measuring operation, at least a second measuring operation, and at least a third measuring operation are carried out, in that during the first measuring operation a first magnetic flux density is generated in the medium and a first measured voltage is determined, in that during the second measuring operation a second magnetic flux density is generated in the medium and a second measured voltage is determined, in that during the third measuring operation a third magnetic flux density is generated in the medium and a third measured voltage is determined, in that the flow velocity is determined from the first magnetic flux density, the second magnetic flux density, the first measured voltage and the second measured voltage, in that the interference voltage is determined from the third magnetic flux density, the third measured voltage and the determined flow velocity, in that, following the compensation measuring operation, the working measuring operation is carried out and the working measuring operation consists of at least a fourth measuring operation, in that during the fourth measuring operation the third magnetic flux density is generated in the medium and a fourth measured voltage is determined, and in that the flow velocity is re-determined from the third magnetic flux density, the fourth measured voltage and the determined interference voltage.

    摘要翻译： 用于测量流动介质的流速的磁感应流量计的操作方法技术领域本发明涉及一种用于测量流动介质的流速的磁感应流量计的操作方法，包括具有电磁体装置的磁场生成装置和用于生成具有不同磁通密度的磁场的永磁装置 并且具有包括测量电极装置的测量装置，该测量电极装置用于测量由磁场在流动介质中感应的测量电压，并且在该测量电压上叠加干扰电压。 根据本发明，规定了一种上述类型的方法，其中实现了干扰电压的改进补偿和功耗最小化，具体地，由于执行由补偿测量操作和工作测量操作组成的测量循环 其特征在于，在所述补偿测量操作期间，执行至少第一测量操作，至少第二测量操作和至少第三测量操作，其中在所述第一测量操作期间在所述第一测量操作期间产生第一磁通密度 确定第一测量电压，其中在第二测量操作期间在介质中产生第二磁通密度并且确定第二测量电压，其中在第三测量操作期间在第 确定中等和第三测量电压，其中流速由第 所述第一磁通密度，所述第二磁通密度，所述第一测量电压和所述第二测量电压的不同之处在于，所述干扰电压根据所述第三磁通密度，所述第三测量电压和所确定的流速来确定， 进行补偿测量操作，进行工作测量操作，并且工作测量操作包括至少第四测量操作，其中在第四测量操作期间，在介质中生成第三磁通密度并且确定第四测量电压 并且其中流速由第三磁通密度，第四测量电压和确定的干扰电压重新确定。