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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
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.
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公开(公告)号：EP3748313B1
公开(公告)日：2024-11-06
申请号：EP19178327.3
申请日：2019-06-05
发明人： FRÖVIK, Christer , EDVARDSSON, Olv
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公开(公告)号：EP4043841B1
公开(公告)日：2024-09-25
申请号：EP21156859.7
申请日：2021-02-12
CPC分类号： G01F23/284 , H01Q3/12 , G01S13/88 , H01Q1/225 , G01S7/027 , G01S13/426
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公开(公告)号：EP4417943A1
公开(公告)日：2024-08-21
申请号：EP23156717.3
申请日：2023-02-15
IPC分类号： G01F23/284
CPC分类号： G01F23/284 , H01Q1/225 , H01Q19/08
摘要： A radar level gauge system, for determining a filling level of a product in a tank, comprises a transceiver, an antenna assembly, and processing. The antenna assembly comprises a dielectric antenna body having a conical external surface facing an interior of the tank and an internal surface facing away from the interior of the tank, when the antenna assembly is arranged at the opening in the tank wall, and an antenna feed coupled to the transceiver, and configured to propagate the transmit signal towards the internal surface of the dielectric antenna body as electromagnetic waves with convex wavefronts. The internal surface of the dielectric antenna body is shaped to refract the transmit signal from the antenna feed in such a way that the transmit signal propagates towards the surface of the product in the tank as electromagnetic waves with substantially planar wavefronts, following passage through the dielectric antenna body.
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55.发明授权
公开(公告)号：EP3982091B1
公开(公告)日：2024-07-24
申请号：EP20200224.2
申请日：2020-10-06
CPC分类号： G01S13/88 , G01F23/284 , G01S7/414 , G01S7/354 , G01F23/0007 , C23G3/00
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公开(公告)号：EP4357033A1
公开(公告)日：2024-04-24
申请号：EP23201637.8
申请日：2023-10-04
发明人： SJÖSTEDT, Jon , LARSSON, Michael , LARSSON, Stig
CPC分类号： G01N29/022 , G01N29/036 , G01N29/032 , G01N2291/01520130101 , G01N2291/01420130101 , G01N2291/0281820130101 , G01N2291/0283620130101 , G01N2291/042720130101 , G01N29/228 , H01H3/00 , B06B1/045 , G01N11/16 , G01N9/002 , G01N2009/00620130101 , G01F23/2967
摘要： A field device comprising first and second tines; first and second rods coupled to the first and second tines; a coil arrangement fixed to the first rod; a magnet fixed to the second rod, opposite the coil arrangement; excitation circuitry coupled to the coil arrangement and controllable to provide a time-varying current to the coil arrangement, resulting in vibration of the first tine in relation to the second tine; sensing circuitry coupled to the coil arrangement and configured to provide a sensing signal indicative of a change in at least one property of the vibration of the first tine in relation to the second tine; and measurement control circuitry coupled to the excitation circuitry and the sensing circuitry for controlling operation of the excitation circuitry.
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公开(公告)号：EP3924701B1
公开(公告)日：2024-01-17
申请号：EP20705497.4
申请日：2020-02-07
IPC分类号： G01F23/296 , G01F25/20
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公开(公告)号：EP4018168B1
公开(公告)日：2023-12-27
申请号：EP20806962.5
申请日：2020-11-11
IPC分类号： G01F23/26 , G01F23/296
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公开(公告)号：EP2656023B2
公开(公告)日：2023-12-27
申请号：EP11761032.9
申请日：2011-09-05
发明人： NILSSON, Valter
IPC分类号： G01F23/284
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