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公开(公告)号：US07319401B2
公开(公告)日：2008-01-15
申请号：US10928610
申请日：2004-08-27
申请人： Tomas Åkerström , Anders Welin
发明人： Tomas Åkerström , Anders Welin
IPC分类号： G08B21/00
CPC分类号： G01F23/284
摘要： A radar level gauge system for determining the filling level of a filling material in a tank is disclosed. The system comprises a transmitter for transmitting measuring signals towards the surface of the filling material; a receiver for receiving echo signals from the tank; processing circuitry for determining the filling level of the tank based on said echo signal and adapted to compare said determined filling level with at least one preset threshold value and to produce an alarm signal in dependence of said threshold value; and a storage means for storing the preset threshold value, wherein said threshold value in said storage means is replaceable and/or adjustable. The alarm signal could indicate high level and/or overfill. The possibility of adjusting/replacing the threshold values enables adjustment of the alarm levels when the system is already installed.A corresponding method of operation is also disclosed.
摘要翻译： 公开了一种用于确定罐中填充材料的填充水平的雷达液位计系统。 该系统包括用于向测量填充材料的表面传送测量信号的发射器; 用于接收来自储罐的回波信号的接收器; 处理电路，用于基于所述回波信号确定所述储罐的填充水平，并且适于将所述确定的填充水平与至少一个预设阈值进行比较，并根据所述阈值产生报警信号; 以及存储装置，用于存储预设阈值，其中所述存储装置中的所述阈值是可替换的和/或可调节的。 报警信号可能表示高电平和/或溢出。 调整/更换阈值的可能性可以在系统已安装时调整报警级别。 还公开了相应的操作方法。
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公开(公告)号：US07308825B2
公开(公告)日：2007-12-18
申请号：US11251582
申请日：2005-10-14
IPC分类号： G01F23/00 , G01F23/284
CPC分类号： G01F23/284 , G01S13/34
摘要： A tank gauging system for sensing product parameters of a product contained in a tank is disclosed. The system comprises a microwave-based level gauging unit and a temperature gauging unit. A controller of the system includes an external interface adapted to enable communication between the tank gauging system and an external control system; processing circuitry configured for management of communication over the external interface; and a power supply, which is enclosed in an explosion-proof housing and configured to supply intrinsically safe power to the gauging units, wherein the power supply has an essentially rectangular output characteristic. Further, an intrinsically safe two-wire bus connecting the controller and the gauging units is provided, wherein the two-wire bus is usable both for transmitting measurement signals related to the sensed product parameters from the gauging units to the controller and for providing intrinsically safe power from the controller to the gauging units.
摘要翻译： 公开了一种用于感测容器中包含的产品的产品参数的罐测量系统。 该系统包括基于微波的电平计量单元和温度测量单元。 该系统的控制器包括外部接口，其适于实现罐测量系统和外部控制系统之间的通信; 配置用于管理通过外部接口的通信的处理电路; 以及电源，其被封装在防爆壳体中并且被配置为向所述测量单元提供本质安全的电力，其中所述电源具有基本上矩形的输出特性。 此外，提供了一种连接控制器和测量单元的本质安全的双线总线，其中双线总线可用于将与所测量的产品参数相关的测量信号从测量单元发送到控制器，并且用于提供本质安全 从控制器到测量单元的功率。
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33.发明授权公开(公告)号：US07233278B2
公开(公告)日：2007-06-19
申请号：US10938128
申请日：2004-09-10
申请人： Mikael Eriksson
发明人： Mikael Eriksson
IPC分类号： G01S13/08
摘要： A radar level gauge (RLG), intended for measuring with a close-range low-power radar a distance to a content surface in a container relatively to a measuring position, which is located above the surface and fixed in relation to a lower boundary of said container. The RLG comprises a transmitter for transmitting an electromagnetic transmitter pulse, a signal medium interface connectable to means for directing said transmitter pulse towards said surface and for receiving a reception pulse reflected back from said surface, and a receiver for receiving said reception pulse. A switch connects said signal medium interface to said transmitter while said transmitter pulse is transmitted, and said signal medium interface to said receiver while said reflected pulse is received, the switch having a switching time short enough to enable short distance detection.According to this design, signal losses can be reduced significantly compared to prior solutions.
摘要翻译： 雷达液位计（RLG），用于测量距近距离低功率雷达的距离相对于位于测量位置的容器中的内容物表面的距离，该测量位置位于表面上方并相对于下部边界固定 说容器。 RLG包括用于发送电磁发射器脉冲的发射器，可连接到用于将所述发射器脉冲引导到所述表面并用于接收从所述表面反射回来的接收脉冲的装置的信号介质接口和用于接收所述接收脉冲的接收器。 当所述发送器脉冲被发送时，开关将所述信号介质接口连接到所述发射器，并且所述信号介质在接收到所述反射脉冲时与所述接收器接口，所述开关具有足够短的切换时间以实现短距离检测。 根据这种设计，与以前的解决方案相比，可以显着降低信号损耗。
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公开(公告)号：US06915689B2
公开(公告)日：2005-07-12
申请号：US10301551
申请日：2002-11-21
申请人： Kurt O. Edvardsson
发明人： Kurt O. Edvardsson
CPC分类号： H01Q1/225 , H01Q1/22 , H01Q13/02 , H01Q21/062 , H01Q21/24
摘要： An apparatus for gauging the level of a liquid, above which a gas having a dielectric constant within a predetermined dielectric constant range exists, comprises a transmitter for transmitting a microwave signal in a propagation mode in a tube through the gas towards the liquid surface; a receiver for receiving the microwave signal reflected against the liquid surface and propagating back through the tube; and a processing device for calculating from the propagation time of the transmitted and reflected microwave signal the level of the liquid. In order to essentially avoid the influence on the calculated level by the dielectric constant of the gas above the liquid, the transmitter is adapted to transmit the microwave signal in a frequency band, at which the group velocity of the microwave signal in the propagation mode in the tube is, within the predetermined dielectric constant range, essentially independent of the dielectric constant.
摘要翻译： 一种用于测量液体水平的装置，其上存在介电常数在预定介电常数范围内的气体，其中包括用于通过气体朝向液体表面以管传播模式传输微波信号的发射器; 接收器，用于接收反对液面的微波信号，并通过管传播回来; 以及处理装置，用于根据透射和反射的微波信号的传播时间计算液体的水平。 为了基本上避免对液体上方的气体的介电常数对计算出的水平的影响，发射器适于在频带中传输微波信号，在该频带中，微波信号在传播模式中的组速度 该管在预定介电常数范围内基本上与介电常数无关。
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公开(公告)号：US20240271984A1
公开(公告)日：2024-08-15
申请号：US18418530
申请日：2024-01-22
发明人： Magnus Ohlsson , Carl Fjelkner , Thomas Örtenberg
IPC分类号： G01F23/284
CPC分类号： G01F23/284
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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公开(公告)号：US20240219259A1
公开(公告)日：2024-07-04
申请号：US18536774
申请日：2023-12-12
摘要： A method of estimating vibration of a target, comprising performing a first sequence of a predefined first number of distance data acquisition operations, consecutive distance data acquisition operations being separated by a predefined first separation time period, each data acquisition operation resulting in a measurement data set, being a representation of the measurement signal, in a memory; accessing from the memory, the measurement data set for each distance data acquisition operation; determining a first sequence of distance variation values indicative of a variation over time of a distance between the vibration estimation system and the target, based on the measurement data set for each distance data acquisition operation of the first number of distance data acquisition operations; and estimating a first indicator of the vibration of the target based on the first sequence of distance variation values.
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公开(公告)号：US12013278B2
公开(公告)日：2024-06-18
申请号：US17439088
申请日：2019-04-24
发明人： Leif Nilsson , Håkan Samor
IPC分类号： G01F23/284 , G01F23/80 , G01S13/88
CPC分类号： G01F23/284 , G01F23/802 , G01S13/88
摘要： Radar level gauge system comprising: a communication module configured to be connected to an external communication device; a measurement module configured to generate, transmit and receive a measurement signal; a control connection configured to connect the communication module to the measurement module, the control connection being configured to be in a high-impedance mode at least during a measurement by the measurement module; a power supply configured to provide power to the measurement module; an energy storage coupled to the power supply; a measurement connection connecting the communication module to the energy storage, wherein the energy storage is arranged to be charged by the measurement connection and configured to provide power to the power supply for performing a measurement by the measurement module; and a switch arranged between the communication module and the energy storage, the switch being controllable to break the measurement connection between the communication module and the energy storage during a measurement by the measurement module.
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公开(公告)号：US11982562B2
公开(公告)日：2024-05-14
申请号：US17417164
申请日：2019-02-07
发明人： Stig Larsson
IPC分类号： G01F23/284 , G01S13/88 , H01Q1/00 , H01Q1/22
CPC分类号： G01F23/284 , G01S13/88 , H01Q1/002 , H01Q1/225
摘要： A radar level gauge system include a transceiver; an antenna; a hollow waveguide for guiding the transmit signal from a first end facing the transceiver towards a second end facing the antenna; a housing including a heat-dissipating structure arranged at a first distance from the second end; a first thermal connection between the hollow waveguide and the heat-dissipating structure; and a second thermal connection between the hollow waveguide and the housing arranged at a second distance, shorter than the first distance, from the second end. The first and second thermal connection are arranged such that a thermal resistance of a first heat conduction path from the second end of the hollow waveguide through the first thermal connection to the heat-dissipating structure, is lower than a thermal resistance of a second heat conduction path from the second end of the hollow waveguide through the second thermal connection to the housing.
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公开(公告)号：US11940315B2
公开(公告)日：2024-03-26
申请号：US17834311
申请日：2022-06-07
IPC分类号： G01F23/284 , G01F22/00 , G01F25/20
CPC分类号： G01F23/2845 , G01F22/00 , G01F23/284 , G01F25/20
摘要： A filling level determination system, for determining a filling level of a product in a tank, comprising a measurement unit for arrangement at a measurement position, the measurement unit including a transceiver; and an antenna arrangement coupled to the transceiver for radiating an electromagnetic transmit signal generated by the transceiver from the measurement position towards a target position on the tank wall, and for returning an electromagnetic first reflection signal resulting from reflection of the transmit signal at the target position back towards the transceiver; and processing circuitry coupled to the transceiver of the measurement unit and being configured to determine the filling level based on tank deformation data indicative of a known relation between the level of the product in the tank and deformation of the tank at the first target position, and a timing relation between the first transmit signal and the first reflection signal.
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40.发明授权公开(公告)号：US11846535B2
公开(公告)日：2023-12-19
申请号：US16854174
申请日：2020-04-21
发明人： Håkan Fredriksson , Peter Elmberg
IPC分类号： G01F23/284 , H01P1/08 , H01Q1/12 , H01Q19/08 , H01Q1/22
CPC分类号： G01F23/284 , H01P1/08 , H01Q1/1214 , H01Q1/225 , H01Q19/08
摘要： A radar level gauge comprising a signal propagation device, a dielectric filling member arranged in the signal propagation device, and a sealing arrangement for preventing tank content from escaping into the outside environment, wherein the dielectric filling member comprises a main body and a sealing arrangement comprising a first sealing portion. The radar level gauge further comprises a structural reinforcement element positioned above the first sealing portion.
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