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    Acoustic Capacity, Volume, and Surface Area Measurement Method
    2.
    发明公开
    Acoustic Capacity, Volume, and Surface Area Measurement Method 有权
    AkustischesKapazitäts-，Volumen- undOberflächenbereichsmessverfahren

    公开(公告)号：EP2096419A1

    公开(公告)日：2009-09-02

    申请号：EP09153795.1

    申请日：2009-02-26

    申请人： Kumamoto University ,  Rion Co., Ltd. ,  Date, Munehiro

    发明人： Torigoe, Ippei ,  Segami, Takashi ,  Date, Munehiro

    IPC分类号： G01F17/00

    CPC分类号： G01F17/00

    摘要： The present invention provides an acoustic capacity measurement method for finding capacity of a container or object by removing effect of the surface area without using an approximate expression of acoustic impedance.
    The acoustic capacity measurement method for finding capacity of a container under test based on a ratio of pressure changes produced in a reference vessel and the container under test by giving equal alternating capacity changes to the reference vessel and the container under test includes a pressure change ratio calculating step of calculating a ratio between measured values of pressure changes in the reference vessel and the container under test; a rotation step of calculating an acoustic admittance component of the container under test by rotating the calculated pressure change ratio by an angle of θ so that the pressure change ratio will vary at a slope of 1 with respect to changes in a surface area in a complex plane; an oblique coordinate transformation step of transforming the calculated acoustic admittance component into an oblique coordinate system whose axes are given by an imaginary axis and a straight line with a slope of 1; and a capacity calculating step of calculating the capacity of the container under test by multiplying values in a direction of the imaginary axis of the acoustic admittance component transformed into oblique coordinates by a predetermined real number.

    摘要翻译： 本发明提供了一种用于通过消除表面积的影响而不使用声阻抗的近似表达来发现容器或物体的容量的声学能力测量方法。 用于根据通过对参考容器和被测试容器施加相等的交变容量变化而在参考容器和被测容器中产生的压力变化的比率来测量被测容器的容量的声学能力测量方法包括压力变化率 计算参考容器和被测容器中的压力变化的测量值之间的比率的计算步骤; 旋转步骤，通过将所计算的压力变化率与所计算出的压力变化比旋转一个角度来计算被测容器的声导纳分量，使得压力变化率相对于复合物中的表面积的变化以斜率1变化 平面; 将计算出的声导纳分量变换为倾斜坐标系的倾斜坐标变换步骤，该倾斜坐标系的轴由假想轴和斜率为1的直线给出; 以及容量计算步骤，通过将被转换为倾斜坐标的声导纳分量的虚轴方向的值乘以预定的实数来计算被测容器的容量。