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公开(公告)号：EP3479137B1
公开(公告)日：2020-05-13
申请号：EP17728843.8
申请日：2017-06-09
发明人： KLEMAN, Mikael
IPC分类号： G01S7/35 , G01S13/34 , G01F23/284 , G01F23/00
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公开(公告)号：EP2972469A1
公开(公告)日：2016-01-20
申请号：EP14708920.5
申请日：2014-03-11
发明人： LARSSON, Lars Ove , KLEMAN, Mikael
IPC分类号： G01S7/35 , G01F23/284 , G01S13/88
CPC分类号： G01S7/292 , G01F23/0076 , G01F23/284 , G01S7/354 , G01S13/88 , G01S2007/356
摘要： A method for providing narrow-band interference unaffected measurement of a distance to a surface of a product kept in a tank, comprising mixing a return signal with a transmit signal to provide an intermediate frequency signal, and determining the distance, based on the intermediate frequency signal. The step of determining the distance further comprises dividing the intermediate frequency signal into a plurality of frequency portions, wherein each frequency portion corresponds to a frequency interval of the transmit signal, identifying disturbed frequency portions as frequency portions affected by narrow-band interference, and determining the distance based on frequency portions being unaffected by narrow-band interference. By dividing the IF-signal into frequency portions corresponding to frequency intervals of the transmit signal, frequency intervals where narrow-band interferences are present may be detected.
摘要翻译： 一种用于提供窄带干扰的方法，其不受距离保持在储存器中的产品的表面的测量，包括将返回信号与发送信号混合以提供中频信号，以及基于中频确定距离 信号。 确定距离的步骤还包括将中频信号划分成多个频率部分，其中每个频率部分对应于发射信号的频率间隔，识别作为受窄带干扰影响的频率部分的干扰频率部分，以及确定 基于频率部分的距离不受窄带干扰的影响。 通过将IF信号划分成与发送信号的频率间隔对应的频率部分，可以检测存在窄带干扰的频率间隔。
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公开(公告)号：EP3462142A1
公开(公告)日：2019-04-03
申请号：EP18197017.9
申请日：2018-09-26
发明人： KLEMAN, Mikael , NILSSON, Leif
IPC分类号： G01F23/284 , G01S13/88 , G01S7/03 , G01S7/02
摘要： A radar level gauge comprising a housing enclosing a compartment providing explosion proof protection, RLG circuitry located inside compartment, which circuitry is incompatible with intrinsic safety requirements, and a signal propagation device located outside the compartment. The housing has an explosion proof first signal passage providing a transmission line for the microwave transmit signal, and an explosion proof second signal passage in providing a two-wire interface for electrically conductively connecting the radar level gauge to an intrinsically safe system located externally of the radar level gauge. Further, the RLG includes an electrical barrier connected between the RLG circuitry and the two-wire interface, the electrical barrier preventing energy and/or thermal energy in the RLG circuitry from compromising the intrinsic safety of an intrinsically safe system connected to the two-wire interface.
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公开(公告)号：EP2965050B1
公开(公告)日：2019-07-10
申请号：EP14707813.3
申请日：2014-03-05
发明人： JIRSKOG, Anders , KLEMAN, Mikael
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公开(公告)号：EP1425558B1
公开(公告)日：2017-04-19
申请号：EP02775617.0
申请日：2002-09-13
发明人： KLEMAN, Mikael , WESTERLING, Jan
IPC分类号： G01S7/03 , G01F23/284 , G01S13/08
CPC分类号： G01S7/032 , G01F23/284 , G01S13/08
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6.发明公开LOW POWER RADAR LEVEL GAUGE SYSTEM WITH INTEGRATED MICROWAVE CIRCUIT 审中-公开麻醉药物麻醉药物MIKROWELLENSCHALTKREIS
公开(公告)号：EP3114498A1
公开(公告)日：2017-01-11
申请号：EP15707395.8
申请日：2015-03-04
摘要： The present invention relates to a radar level gauge system comprising a signal propagation device; a microwave signal source; a microwave signal source controller; a mixer configured to combine a transmit signal from the microwave signal source and a reflection signal from the surface to form an intermediate frequency signal; and processing circuitry coupled to the mixer and configured to determine the filling level based on the intermediate frequency signal. The microwave signal source is configured to exhibit a phase noise greater than or equal to −70 dBc/Hz @ 100 kHz offset from a carrier frequency for the transmit signal.
摘要翻译： 本发明涉及一种包括信号传播装置的雷达液位计系统; 微波信号源; 微波信号源控制器; 混频器，被配置为组合来自微波信号源的发射信号和来自表面的反射信号以形成中频信号; 以及处理电路，其耦合到所述混频器并且被配置为基于所述中频信号来确定所述填充级别。 微波信号源被配置为表现出与发射信号的载波频率偏移100kHz的相位噪声大于或等于-70dBc / Hz。
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公开(公告)号：EP1991842A1
公开(公告)日：2008-11-19
申请号：EP07709363.1
申请日：2007-02-20
IPC分类号： G01F23/284 , G01F23/14 , G01F25/00
CPC分类号： G01F23/284 , G01F23/18 , G01F25/0061 , G01S13/08
摘要： A method and system for determining a product level in a tank, comprising determining a first level measure using emission of electromagnetic waves into the tank, detecting a differential pressure, determining an observed density based on the detected differential pressure and the first level measure, and determining a second level measure based on the observed density and a currently measured differential pressure. The present invention is based on the realization that a level measurement based on differential pressure and an observed density can provide a valuable redundant level measurement. Such a redundant measurement can provide increased reliability and enable detection of errors.
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公开(公告)号：EP3114498B1
公开(公告)日：2020-05-06
申请号：EP15707395.8
申请日：2015-03-04
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公开(公告)号：EP3479137A1
公开(公告)日：2019-05-08
申请号：EP17728843.8
申请日：2017-06-09
发明人： KLEMAN, Mikael
IPC分类号： G01S7/35 , G01S13/34 , G01F23/284
摘要： A radar level gauge system controllable between a measurement state and a signal processing state. In the measurement state a first timing signal circuit is enabled, a microwave signal source generates a transmit signal with a time-varying frequency being related to first timing signals from the first timing signal generating circuitry, and a sampler samples a mixer signal at sampling times related to the first timing signals. in the signal processing state, the first timing signal circuit is disabled, and a signal processor determines the filling level based on the sampled values of the mixer signal using second timing signals from a second timing signal generating circuit.
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公开(公告)号：EP3126795B1
公开(公告)日：2019-01-30
申请号：EP15712969.3
申请日：2015-04-01
发明人： KLEMAN, Mikael
IPC分类号： G01F25/00 , G01F23/284 , G01S7/40 , G01S13/34 , G01S13/88
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