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    FLOW RATE MEASUREMENT DEVICE
    4.
    发明公开
    FLOW RATE MEASUREMENT DEVICE 审中-公开
    流量测量装置

    公开(公告)号：EP2375223A1

    公开(公告)日：2011-10-12

    申请号：EP09837458.0

    申请日：2009-12-25

    申请人： Panasonic Corporation

    发明人： TAKEMURA, Koichi ,  SHIBA, Fumikazu ,  BESSHO, Daisuke

    IPC分类号： G01F1/66 ,  G01F3/22

    CPC分类号： G01F1/667

    摘要： Switching a transmitting and receiving direction of two transducers (2,3) in the forward and the reverse direction, a time differential memory part (17b) storing a propagation time differential every K times a unit measurement process being executed, the propagation time differential being a differential between a propagation time of the ultrasonic wave signal in a forward direction and in a reverse direction, a flow rate calculating part (15) calculating a flow rate of a passing fluid based on a lump sum of propagation times in both the forward and the reverse directions obtained at least every K times of a unit measurement process being executed, an estimating part (18) estimating a change in a momentary flow rate of the fluid based on the time differential obtained every K times of the unit measurement process being executed and storing thereof in a time differential memory part (17b), thus obtaining an accurate flow rate and detecting the change in the momentary flow rate.

    摘要翻译： 在正向和反向切换两个换能器（2,3）的发射和接收方向，时间差分存储器部分（17b）存储传播时间差，每K次执行单位测量过程，传播时间差是 超声波信号的正向传播时间和反向传播时间之间的差;流量计算部（15），基于正向传播时间和正向传播时间两者中的传播时间总和计算通过流体的流量; 至少每K次执行单位测量处理获得的相反方向;估计部分（18），基于每执行K次单位测量处理获得的时间差估计流体的瞬时流量的变化 并将其存储在时间差分存储器部分（17b）中，从而获得精确的流量并检测瞬时流量的变化。

    ULTRASONIC FLOW METER
    5.
    发明公开
    ULTRASONIC FLOW METER 有权
    ULTRASCHALL-STRÖMUNGSMESSER

    公开(公告)号：EP2101160A1

    公开(公告)日：2009-09-16

    申请号：EP07742552.8

    申请日：2007-04-26

    申请人： Panasonic Corporation

    发明人： BESSYO, Daisuke ,  SHIBA, Fumikazu ,  TAKEMURA, Koichi

    IPC分类号： G01F1/66

    CPC分类号： G01F1/667

    摘要： It is desirable that an operation of an oscillator used for measuring propagation time of ultrasonic waves in an ultrasonic flowmeter be an intermittent operation in order to achieve electric power savings. However, pulse stability of the oscillator requires time, so that there is a problem that the intermittent operation cannot be performed.
    An ultrasonic flowmeter comprising an oscillator 60, and an oscillation start unit 61 for accelerating oscillation of the oscillator, constructed so that a pulse of the oscillator oscillated by the oscillation start unit 61 is used in measurement of propagation time of ultrasonic waves.

    摘要翻译： 希望在超声波流量计中测量超声波的传播时间的振荡器的动作为间歇动作，以实现电力节约。 然而，振荡器的脉冲稳定性需要时间，因此存在不能进行间歇操作的问题。 一种超声波流量计，包括振荡器60和用于加速振荡器的振荡的振荡开始单元61，其被构造成使得由振荡开始单元61振荡的振荡器的脉冲用于测量超声波的传播时间。