Explosion protection circuit with impedance matching

    公开(公告)号:US10461526B2

    公开(公告)日:2019-10-29

    申请号:US15506794

    申请日:2015-08-19

    Abstract: An apparatus for monitoring at least one physical or chemical process variable, comprising at least one sensor unit and an electronics unit for signal registration, evaluation and/or feeding, wherein the sensor unit is operated with alternating electrical current and/or communication between the electronics unit and the sensor unit occurs with alternating electrical current and/or alternating voltage. An explosion protection circuit with intrinsic safety, which includes a safety barrier, which has at least one unit for electrical current- and/or voltage limiting, is provided within the explosion protection circuit a unit for impedance matching, which unit for impedance matching includes at least one transformer.

    ULTRASONIC TRANSDUCER FOR A FLOW MEASURING DEVICE
    26.
    发明申请
    ULTRASONIC TRANSDUCER FOR A FLOW MEASURING DEVICE 有权
    用于流量测量装置的超声波传感器

    公开(公告)号:US20130192386A1

    公开(公告)日:2013-08-01

    申请号:US13728002

    申请日:2012-12-27

    CPC classification number: G01F1/66 B06B3/00 G01F1/662 G10K11/04

    Abstract: An ultrasonic transducer for an ultrasonic flow measuring device, comprising a first housing part having an ultrasonic window and adjoining, rotationally symmetric walls, wherein there adjoins on the walls of the first housing part, coaxially with the walls of the first housing part, a first ring as resonator, which forms an end of the first housing part.

    Abstract translation: 一种用于超声波流量测量装置的超声波换能器,包括具有超声波窗口和邻接的旋转对称壁的第一壳体部分,其中在第一壳体部分的壁上与第一壳体部分的壁同轴地邻接第一壳体部分, 环形作为谐振器,其形成第一壳体部分的端部。

    REPLACEABLE ULTRASONIC TRANSDUCER FOR AN ULTRASONIC FLOW MEASURING DEVICE
    27.
    发明申请
    REPLACEABLE ULTRASONIC TRANSDUCER FOR AN ULTRASONIC FLOW MEASURING DEVICE 有权
    用于超声波流量测量装置的可更换超声波传感器

    公开(公告)号:US20130167654A1

    公开(公告)日:2013-07-04

    申请号:US13727779

    申请日:2012-12-27

    CPC classification number: G01F1/662 G01F15/18

    Abstract: An ultrasonic transducer for an ultrasonic flow measuring device, comprising a first housing part and a second housing part. The second housing part is axially guided in the first housing part and is so biased relative to the first housing part that, in a first state of the ultrasonic transducer, a first axial stop of the second housing part rests on a first axial stop of the first housing part, wherein, by applying, counter to the bias, a predetermined force on a second axial stop of the second housing part, the second housing part is axially shiftable, so that, in a second state of the ultrasonic transducer, the first axial stop of the second housing part is moved out of the first state.

    Abstract translation: 一种用于超声波流量测量装置的超声换能器,包括第一壳体部分和第二壳体部分。 第二壳体部分在第一壳体部分中被轴向引导并且相对于第一壳体部分被偏置,在超声波换能器的第一状态下,第二壳体部件的第一轴向停止件停留在第一壳体部件的第一轴向止动件上 第一壳体部分,其中,通过相对于所述偏压施加预定力在所述第二壳体部分的第二轴向止挡上,所述第二壳体部分可轴向移动,使得在所述超声换能器的第二状态下,所述第一壳体部分 第二壳体部件的轴向停止被移出第一状态。

    Clamp-on ultrasonic flowmeter and method for adjusting transducer elements using an adjusting device having at least two degrees of freedom

    公开(公告)号:US11448538B2

    公开(公告)日:2022-09-20

    申请号:US16956503

    申请日:2018-11-14

    Abstract: A clamp-on ultrasonic flowmeter includes a measuring tube, a pair of ultrasonic contact transducers, and an electronic measuring/operating circuit for operating the transducers. Each transducer includes a transducer element for generating and detecting ultrasonic signals and a coupling element. The transducer element is located on one side of the coupling element facing away from the measuring tube, and is designed to be acoustically coupled to the measuring tube via another side of the coupling element facing the measuring tube, and designed to transmit ultrasonic signals between the transducer element and measuring tube. The ultrasonic flowmeter comprises an adjusting device for at least one transducer for adjusting the transducer. The adjusting device is arranged and configured to modify at least one angle of the signal path with respect to the coupling face or a signal path length, wherein the adjusting device has at least two degrees of freedom.

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