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    • 8. 发明授权
    • Vibronic sensor
    • US10557826B2
    • 2020-02-11
    • US15521625
    • 2015-09-02
    • Endress + Hauser GmbH + Co. KG
    • Raphael KuhnenIra HenkelPeter Wimberger
    • G01F23/296G01N11/16G01N29/22G01N29/46G01N29/07G01N9/00G01N29/02
    • An apparatus for determining and/or monitoring at least one process variable of a medium in a container, comprising at least an oscillatable unit having at least one membrane, and at least one oscillatory element, a driving/receiving unit embodied to excite the mechanically oscillatable unit by means of an electrical, exciter signal of adjustable excitation frequency to execute oscillations in an oscillation mode corresponding to the excitation frequency and to receive mechanical oscillations from the oscillatable unit and to convert such into an electrical received signal, and an electronics unit embodied, to produce the exciter signal, and to ascertain from the received signal the at least one process variable. The membrane is connected with the driving/receiving unit. The oscillatory element has the shape of an oscillatory rod, on which a paddle is terminally formed, and the oscillatory element is secured on the membrane in an end region remote from the paddle. Mass distribution, stiffness and/or geometry of the oscillatable unit is/are selected in such a manner that at least one of the oscillation modes of the oscillatable unit higher in reference to the oscillation mode corresponding to the excitation frequency lies in the range between two neighboring whole-numbered multiples of the excitation frequency.
    • 10. 发明授权
    • Method for fill level measurement using the travel time principle
    • US10416021B2
    • 2019-09-17
    • US14782541
    • 2014-02-17
    • Endress + Hauser GmbH + Co. KG
    • Stefan GorenfloAlexey Malinovskiy
    • G01F25/00G01F23/284G01F23/296
    • A method for measuring a fill level of a fill substance in a container with a fill-level measuring device working according to the travel time principle. The fill-level measuring device in measurement operation sends transmission signals toward the fill substance in the container and, based on their signal fractions reflected back in the container, derives echo functions, which give the amplitudes of the signal fractions as a function of their travel time. With the assistance of a table, whose rows correspond to discrete fill levels and whose columns correspond to discrete travel times, and in which are stored as historical measurement points, in each case, in that row, whose row index corresponds to the associated fill level, information derived from echo functions derived in the past concerning travel times of echo function maxima attributed to reflections on reflectors located in the container, that also delivers reliable measurement results, when measuring conditions at the location of use of the fill-level measuring device can change, wherein the table is continuously updated based on current echo functions derived in ongoing measurement operation, wherein current measurement points derived from current echo functions are stored.