Measuring and operating circuit of a coriolis-type mass flow meter
    1.
    发明授权
    Measuring and operating circuit of a coriolis-type mass flow meter 失效
    科里奥利质量流量计的测量和运行电路

    公开(公告)号:US6073495A

    公开(公告)日:2000-06-13

    申请号:US39607

    申请日:1998-03-16

    申请人: Dietmar Stadler

    发明人: Dietmar Stadler

    IPC分类号: G01F1/84

    摘要: In order to raise the measuring accuracy of a Coriolis-type mass flow rate meter in a cost-effective fashion, the latter comprises a measuring tube (4), a subcircuit measuring circuit and a subcircuit exciting circuit. Two vibration sensors (17, 18) and a vibration exciting (16) are arranged on the measuring tube. The vibration sensor (17) is assigned the amplifier (v1) in the subcircuit measuring circuit, and the vibration sensor (18) is assigned the amplifier (v2). Downstream of the two amplifiers are the summing stage (ss1) with a downstream integrating stage (ig), and the difference stage (ds). Downstream of the integrating stage (ig), the difference stage and the amplifier (v1) are the A/D converters (aw1, aw2, aw3), following which the digital processor (dp) is connected; it supplies the digital mass signal (m) and/or the digital density signal (d), as well as the gain control signal (v) for the amplifier (v2). The subcircuit exciting circuit contains the digital generator (dg), which supplies the digital exciting signal at the output (a1). The digital frequency controller (fr) is connected on the input side to the digital generator and to the digital processor, and on the output side to the frequency control input of the digital generator. The digital amplitude controller (ar1) is connected on the input side to the output (a5) of the digital processor, and on the output side to the amplitude control input of the digital generator.

    摘要翻译: 为了以成本有效的方式提高科里奥利质量流量计的测量精度,后者包括测量管(4),分支电路测量电路和子电路激励电路。 两个振动传感器(17,18)和振动激励(16)布置在测量管上。 振动传感器(17)被分配在子电路测量电路中的放大器(v1),振动传感器(18)被分配放大器(v2)。 两个放大器的下游是具有下游积分级(ig)和差分级(ds)的求和级(ss1)。 在积分级(ig)的下游,差分级和放大器(v1)是数字处理器(dp)连接的A / D转换器(aw1,aw2,aw3) 它提供数字质量信号(m)和/或数字密度信号(d)以及放大器(v2)的增益控制信号(v)。 子电路励磁电路包含数字发生器(dg),它在输出端(a1)提供数字激励信号。 数字频率控制器(fr)在输入侧连接到数字发生器和数字处理器,输出端连接到数字发生器的频率控制输入端。 数字幅度控制器(ar1)在输入侧连接到数字处理器的输出(a5),在输出侧连接到数字发生器的幅度控制输入。