公开(公告)号：EP1955022A1

公开(公告)日：2008-08-13

申请号：EP06841277.4

申请日：2006-11-30

申请人： Endress+Hauser Flowtec AG

发明人： POPP, Oliver ,  KOUDAL, Ole ,  GIMSON, Chris ,  KHAN, Mohammed ,  BAILEY, Jonathan

IPC分类号： G01F1/696 ,  G01F25/00

CPC分类号： G01F1/696 ,  G01F25/0007

摘要： The invention relates to a device for determining and/or monitoring the mass flow rate of a fluid medium through a conduit (2) or through a measuring tube. Said device has at least two temperature sensors (11, 12) and a control/evolution unit (10), both temperature sensors (11, 12) being located in a region of the housing (5) facing the medium (3) and being in thermal contact with the medium (3) flowing through the conduit (2) or through the measuring tube. A first temperature sensor (11) and a second temperature sensor (12) are configured as to be heatable. The first temperature sensor (11) and the second temperature sensor (12) can be alternately actuated to be a passive, non-heated temperature sensor providing data on the actual temperature of the medium (3) during a first measuring interval, and as an active, heated temperature sensor providing data on the mass flow rate of the medium (3) through the conduit (2) or through the measuring tube (2) during a second measuring interval. The control/evaluation unit (10) outputs a message and/or carries out a correction of the recorded mass flow rate if the measured values of the two temperature sensors (11, 12) acquired during the first measuring interval and during the second measuring interval differ from each other.

公开(公告)号：EP1423663A1

公开(公告)日：2004-06-02

申请号：EP02774521.5

申请日：2002-08-17

申请人： Endress + Hauser Flowtec AG

发明人： KOUDAL, Ole ,  NIERLICH, Thomas ,  HÖCKER, Rainer

IPC分类号： G01F1/32

CPC分类号： G01F1/3218 ,  G01F1/3209 ,  G01F1/3263 ,  G01F1/3272 ,  G01F1/86

摘要： The invention relates to a turbulent flow meter (1) for measuring the mass flow rate, the volumetric flow rate, or the flow rate of a fluid, which flows in a measuring tube (2) that has a tube wall (21). Said meter has a temperature sensor (34), which is positioned in such a way that the turbulent flow meter can also be used with fluids that are corrosive to the temperature sensor. A resistance body (4), which creates turbulence and thus pressure fluctuations, is located in the measuring tube. A turbulence sensor (3), which responds to said body, is inserted in a bore (22) of the tube wall (21) of the measuring tube, downstream of the resistance body. The turbulence sensor (3) comprises a membrane (33) that covers the bore (22), a sensor vane (31) that projects into the fluid being fixed to said membrane. The temperature sensor (34) is fixed in a blind bore (314) of the sensor vane on the base of said bore. A sensor element (35) is fixed on the opposite side of the membrane from the sensor vane. Alternatively, the temperature sensor can be located in a longitudinal bore (24) of the resistance body.