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    • 44. 发明授权
    • Sensing element for an ultrasonic volumetric flowmeter
    • 超声波流量计的传感元件
    • US5131279A
    • 1992-07-21
    • US648924
    • 1991-02-01
    • Michael LangMichael SteinacherUrs Wust
    • Michael LangMichael SteinacherUrs Wust
    • G01F1/66
    • G01F1/667G01F1/662
    • This sensing element, which is to be installed in a pipeline conducting the fluid to be measured, consists of a straight section of pipe (1) with an unrestricted cross-sectional area and an uninterrupted wall to the external surface of which are positively fixed, successively in the downstream direction and in a spaced-apart relationship: a first resonance absorber (11) at the inlet end consisting of at least one absorber disk (111), a first transducer disk (21) having a first ultrasonic transducer (31) attached to one lateral surface thereof which excites the radial resonance frequency of said first transducer disk (21), a second transducer disk (22) having a second ultrasonic transducer (32) attached to one lateral surface thereof which excites the radial resonance frequency of said second transducer disk (22), and a second resonance absorber (12) at the outlet end consisting of at least one absorber disk (121), the absorber disks (111, 121) being dimensioned so that their respective radial resonance frequencies are equal to the excitation frequencies of the associated ultrasonic transducers.
    • 要安装在导管待测流体的管道中的该传感元件由具有无限制横截面积的管道(1)的直的部分和其外表面被固定的不间断的壁组成, 连续地沿下游方向和间隔开的关系:入口端的第一共振吸收器(11)由至少一个吸收盘(111)组成,第一换能器盘(21)具有第一超声换能器(31) 附接到其激发所述第一换能器盘(21)的径向共振频率的一个侧表面,具有附接到其一个侧表面的第二超声换能器(32)的第二换能器盘(22),所述第二超声换能器激发所述 第二换能器盘(22)和在由至少一个吸收盘(121)组成的出口端处的第二共振吸收器(12),所述吸收器盘(111,121)的尺寸被设计成使得它们各自 径向共振频率等于相关超声换能器的激发频率。