公开(公告)号：EP2906915A1

公开(公告)日：2015-08-19

申请号：EP13766052.8

申请日：2013-09-23

Applicant: Endress+Hauser Flowtec AG

Inventor： KIRST, Michael ,  RIEDER, Alfred

IPC: G01F25/00 ,  G01F1/84 ,  G01F15/02

CPC classification number: G01F1/849 ,  G01F1/8436 ,  G01F1/8495 ,  G01F15/02 ,  G01F25/0007

Abstract: The invention relates to a measuring system comprising a vibration element for guiding flowing medium, which vibration element (V1) has a lumen, and comprising a vibration element (V2) which is configured in order to be contacted by a portion of the medium, at least periodically. Furthermore, the measuring system comprises at least two vibration exciters (E1, E2) for activating resonance vibrations of in each case one of the vibration elements (V1, V2), two vibration sensors (S1, S2) that are located at a distance from each other for capturing vibrations of the vibration element (V1), which vibration sensors generate in each case a vibration signal (s1 or s2) dependent on vibrations of the vibration element (V1) and at least one vibration sensor (S3) for capturing vibrations of the vibration element (V2), which vibration sensor generates a vibration signal (s3) dependent on vibrations of the vibration element (V2), which vibration signal comprises a signal frequency that corresponds to a resonance frequency, f
r2 , of the vibration element (V2). Moreover, the measuring system also comprises measuring and operating electronics (ME) which on the basis of a phase difference Δ
φ12 existing between the vibration
signals (s1, s2) and on the basis of the signal frequency of the vibration signal (s3) generates a measuring value representing the volume flow rate and/or the volume flow (X
v and/or X
v ).

Abstract translation: 该测量系统包括：用于引导流动介质和具有管腔的振动元件; 并且其angepasst的振动元件，在所有待接触，至少有时，通过所述介质的一部分。 此外，该测量系统包括用于在respectivement振动元件的令人兴奋的谐振振荡的至少两个振荡激励，两个用于注册所述振动元件的振动相互隔开的振荡传感器，每个传感器中的振荡信号取决于所述振动元件的振动哪些基因率， 以及用于登记振动元件和生成，依赖于振动元件的振荡信号，其具有信号频率的振动元件的对应于一个共振频率，振动的振动的至少一个振动传感器。 更上方，速度测量系统，以便包括测量和驱动电子设备，其中基于相位差，振荡信号和之间存在基于振荡信号生成率表示体积流量，分别的体积流量的测量值的信号频率。

公开(公告)号：EP2739944A1

公开(公告)日：2014-06-11

申请号：EP12742830.8

申请日：2012-07-17

Applicant: Endress+Hauser Flowtec AG

Inventor： RIEDER, Alfred ,  DRAHM, Wolfgang ,  ZHU, Hao ,  HUBER, Christof ,  KUMAR, Vivek ,  KIRST, Michael

IPC: G01F1/84 ,  G01F25/00 ,  G01B21/08 ,  G01N25/18

CPC classification number: G01F25/0007 ,  G01B11/06 ,  G01B21/085 ,  G01F1/8436 ,  G01F1/8477 ,  G01K3/04 ,  G01N3/56 ,  G01N17/008

Abstract: The invention relates to a method for detecting a deposit formation or an abrasion on a first measuring tube (A) of a flow meter (2) through which a medium flows. A first temperature time curve is detected by means of a first temperature sensor (30), which is arranged on the first measuring tube (A) in such a way that at least one measuring tube wall of the first measuring tube (A) is formed between the first temperature sensor (30) and the medium. At the same time, a second reference temperature time curve is detected by a second temperature sensor (38) that is at a distance from the first temperature sensor (30), which second temperature sensor is thermally coupled to the medium. From this, at least one variable that is characteristic for a heat exchange from the medium via the measuring tube wall to the first temperature sensor (30) is determined and a deposit formation or an abrasion on the first measuring tube (A) is detected, if the at least one measured characteristic variable or a variable derived therefrom differs by more than one threshold value from a pre-determined reference variable.