Method and apparatus for measuring mass flow
    1.
    发明授权
    Method and apparatus for measuring mass flow 失效
    测量质量流量的方法和装置

    公开(公告)号:US5700957A

    公开(公告)日:1997-12-23

    申请号:US592389

    申请日:1996-02-01

    IPC分类号: G01F1/84 G01F1/78

    CPC分类号: G01F1/8413 G01F1/8477

    摘要: Apparatus for measuring mass flow of a fluid stream comprising inlet and outlet conduits for the fluid stream, at least one resilient flow tube having fixed mounting ends communicating with the inlet and outlet conduits, a vibrator for oscillating the flow tube transverse to the axis of the flow tube, sensors for generating signals corresponding to the oscillating motion of the flow tube and a signal processing unit for determining the mass flow from said signals on the basis of the Coriolis reaction force by the fluid against the flow tube. According to the invention the flow tube is formed as a symmetrical loop around the amount ends, said loop providing a change in the direction of flow which is greater than 360.degree., and vibrator is located on the flow tube at a point adjacent the mounting ends. Method for measuring mass flow of a fluid stream, wherein the said at least one flow tube is oscillated at a resonant frequency higher than the fundamental resonant frequency of the flow tube.

    摘要翻译: PCT No.PCT / HU94 / 00033 Sec。 371日期:1996年2月1日 102(e)日期1996年2月1日PCT 1994年8月3日PCT PCT。 公开号WO95 / 04259 日期1995年2月9日用于测量流体流的质量流量的装置,其包括用于流体流的入口和出口导管,至少一个弹性流管,其具有与入口和出口导管连通的固定安装端,振动器, 流体管的轴线,用于产生对应于流管的振荡运动的信号的传感器和用于基于流体对流管的科里奥利反作用力从所述信号确定质量流量的信号处理单元。 根据本发明,流管围绕数量端形成为对称环,所述环提供大于360°的流动方向的变化,并且振动器位于与安装端相邻的点处的流管上 。 用于测量流体流的质量流量的方法,其中所述至少一个流管以高于流管的基本共振频率的谐振频率振荡。

    Coriolis type apparatus for measuring mass flow of a fluid stream
    2.
    发明授权
    Coriolis type apparatus for measuring mass flow of a fluid stream 失效
    用于测量流体流的质量流量的科里奥利型装置

    公开(公告)号:US5627326A

    公开(公告)日:1997-05-06

    申请号:US318841

    申请日:1995-02-06

    IPC分类号: G01F1/84

    摘要: A Coriolis type apparatus for measuring mass flow of a fluid stream, comprising at least one flow conduit which is oscillated at a resonant frequency transverse to the direction of flow while said fluid flows therethrough, two sensors for generating analog signals corresponding to the motion of the flow conduit, and signal processing means for determining time difference between said analog signal, said signal processing means including means for converting said analog signals into series of digital signals and means to compute from said series of digital signals said time difference by using Fourier transformation. Each of the analog signals generated by the sensors is converted into a series of digital signals by an incremental type analog-digital converter having a comparator, an up-down counter and a digital-analog converter.

    摘要翻译: PCT No.PCT / HU93 / 00026 Sec。 371日期:1995年2月6日 102(e)日期1995年2月6日PCT 1993年4月26日PCT PCT。 第WO93 / 22629号公报 日期:1993年11月4日科里奥利型流体流的质量流量测量装置,包括至少一个在所述流体流过其中以横向于流动方向的共振频率振荡的流动管道的两个传感器,用于产生相应的模拟信号 以及用于确定所述模拟信号之间的时差的信号处理装置,所述信号处理装置包括用于将所述模拟信号转换为数字信号的装置的装置,以及从所述一系列数字信号计算所述时间差的装置 通过使用傅里叶变换。 由具有比较器,升降计数器和数模转换器的增量型模数转换器将由传感器产生的每个模拟信号转换成一系列数字信号。