公开(公告)号：EP2936686A1

公开(公告)日：2015-10-28

申请号：EP13802000.3

申请日：2013-11-25

Applicant: Endress+Hauser Flowtec AG

Inventor： SIMON, Antoine ,  KLEIN, Francois

IPC: H03M1/06 ,  H03M1/66

CPC classification number: H03M1/0612 ,  H03M1/66

Abstract: The transformer circuit is used to transform a digital measuring signal (x
D ) representing a progression over time of a physical and/or chemical measured variable (x) which can change over time into an analogue measured value signal depending on said digital measuring signal with a signal current (ix), a current intensity of which represents a measured value (X) for the measured variable. To this end, the transformer circuit comprises a current interface with a control input (lctrl_in), a current signal output (l1, l2) and a current output (ID_out). Furthermore, the transformer circuit comprises a microprocessor with a measuring signal input (xD_in) for the digital measuring signal (xD), a current signal input (ID_in) connected to the current signal output (IST_out) of the current interface and a control output (lctrl_out) connected to the control input (lctrl_in) of the current interface. The current interface is configured to allow the signal current to flow through the current output and while this is happening both to adjust the current strength to a static current strength level (Ix) corresponding to a control value (WD,j) applied at this moment to the control input (lctrl_in) and also to output a sequence of current values (iD) at the current signal output (lIST_out). Furthermore, the microprocessor is configured to generate a sequence of measured values on the basis of the digital measuring signal (XD), and on this basis to generate and output at the control output a sequence of control values (wD) and to monitor and/or check the current interface using the sequence of control values (wD) and the sequence of current values (iD).

公开(公告)号：EP2638366B1

公开(公告)日：2015-04-15

申请号：EP11770814.9

申请日：2011-10-20

Applicant: Endress+Hauser Flowtec AG

Inventor： KEITA, Mamadi ,  SIMON, Antoine ,  TOUZIN, Mike

IPC: G01F1/84 ,  G01N9/00 ,  G01N11/16

CPC classification number: G01F1/3227 ,  G01F1/8404 ,  G01F1/8409 ,  G01F1/845 ,  G01F1/8472 ,  G01F1/8477 ,  G01N9/002 ,  G01N11/16

公开(公告)号：EP2638366A1

公开(公告)日：2013-09-18

申请号：EP11770814.9

申请日：2011-10-20

Applicant: Endress+Hauser Flowtec AG

Inventor： KEITA, Mamadi ,  SIMON, Antoine ,  TOUZIN, Mike

IPC: G01F1/84 ,  G01N9/00 ,  G01N11/16

CPC classification number: G01F1/3227 ,  G01F1/8404 ,  G01F1/8409 ,  G01F1/845 ,  G01F1/8472 ,  G01F1/8477 ,  G01N9/002 ,  G01N11/16

Abstract: The present invention relates to a vibration-type measuring transducer (4) for a fluid flowing in a flexible tube (8). In this case, the measuring transducer (4) has a tube carrier unit (10) which has, at least in sections, a loop-shaped outer contour around which a flexible tube (8) can be guided. The measuring transducer (4) also has a clamping unit (26) which can be used to clamp a flexible tube (8), which is guided around the loop-shaped outer contour during use, against the loop-shaped outer contour, at least one exciter (D) which is coupled to the tube carrier unit (10) and can be used to excite the tube carrier unit (10) to perform mechanical vibrations which are associated with alternating, elastic deformation of the tube carrier unit (10), and at least one vibration sensor (S
1 , S
2 , S
3 , S
4 ) which can be used to detect mechanical vibrations of the tube carrier unit (10) and/or of a flexible tube (8) which is inserted into the measuring transducer (4) during use.