公开(公告)号：EP1546665A1

公开(公告)日：2005-06-29

申请号：EP03798611.4

申请日：2003-08-15

申请人： SAAB Rosemount Tank Radar AB

发明人： WESTERLING, Jan ,  HAKANSSON, Magnus

IPC分类号： G01F23/284 ,  H01Q1/42

CPC分类号： H01Q1/225 ,  G01F23/284 ,  H01Q1/22 ,  H01Q1/40 ,  H01Q1/42

摘要： The present invention relates to a device in a level gauging system comprising an antenna using radar waves to gauge a level of a surface of a fluid kept in a container. The antenna is arranged above the fluid surface and comprises a plane surface facing the fluid surface and being substantially parallel with the fluid surface. The plane surface has means for transmitting radar waves towards the fluid surface and means for receiving reflected radar waves from the fluid surface in order to gauge the fluid level. The antenna comprises a radome which at least partially covers the plane surface and is shaped such that condensed fluid is directed away from the antenna by force of gravity. A thermally insulating filling material is provided between the randome and the plane surface.

公开(公告)号：EP1606595A1

公开(公告)日：2005-12-21

申请号：EP04717911.4

申请日：2004-03-05

申请人： SAAB Rosemount Tank Radar AB

发明人： HÄGG, Lennart

IPC分类号： G01F23/284

CPC分类号： G01F23/263 ,  G01F23/284 ,  G01F25/0061

摘要： The present invention relates to the field of radar level gauging systems, in which a level of a surface (12) of a product (16) stored in a container (10) is measured. The gauging system comprises: a radar level gauge (14) arranged above the surface (12) of the product (16) which is arranged to transmit a microwave signal towards the product surface (12) and receive a reflected microwave signal from the product surface(12); a calculation unit arranged to determine a measured value of the product level based upon the received signal; means for comparing the measured value of the product level with a predetermined value; and a second level gauge (20) arranged closed to the bottom of the container (10) and arranged to determine the product level when the measured value is below the predetermined value.

公开(公告)号：EP1540290A1

公开(公告)日：2005-06-15

申请号：EP03792924.7

申请日：2003-08-20

申请人： Saab Rosemount Tank Radar AB

发明人： H LL, Ola ,  JOHANSSON, Daniel ,  LARSSON, Stig

IPC分类号： G01F23/284 ,  G01S13/08

CPC分类号： G01F23/284 ,  F17C13/021 ,  F17C2250/032 ,  F17C2250/036 ,  F17C2250/0408 ,  F17C2250/0417 ,  F17C2250/0491 ,  F17C2260/022 ,  G01S13/87 ,  G01S13/88

摘要： Method and device for calculating the level of the surface of a product in a storage room by a radar level gauging system, which includes a first gauging device for calculating a first value of level and functionally separated from the first gauging device a second gauging device for calculating a second value of said level, wherein: a first signal is produced being dependent of a preset first threshold value of the level in the first gauging device, a first current level value signal is output from the first gauging device, a second signal is produced in dependence of a preset second threshold value of the level in the second gauging device, a second current level value signal is output from the second gauging device and the value of the current level of said surface is presented by an indicating unit adapted to receive at least one of the first level value signal and the second level value signal for evaluation of the current level value.