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公开(公告)号：US11693087B2
公开(公告)日：2023-07-04
申请号：US17022275
申请日：2020-09-16
发明人： Mikael Eriksson , Leif Nilsson , Håkan Nyberg
IPC分类号： G01F23/284 , G01S7/282 , G01S7/03 , G01S7/285 , G01S7/28
CPC分类号： G01S7/282 , G01S7/032 , G01S7/285 , G01F23/284 , G01S7/03 , G01S7/2806
摘要： A pulsed radar level gauge comprising a pulse generator configured to generate a transmit signal (ST) in the form of a pulse train, a propagation device connected to direct the transmit signal (ST) into a tank and return a microwave return signal (SR), a receiver, sampling circuitry configured to provide a time expanded tank signal, and processing circuitry for determining said filling level based on the time expanded tank signal. The gauge further comprises impedance increasing circuitry arranged to ensure that an input impedance of the receiver is at least 2 kΩ and a delay line arranged between said receiver and said propagation device, the delay line configured to introduce a delay greater than said pulse duration, such that said time expanded signal includes a transmitted pulse.
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公开(公告)号：US20230175882A1
公开(公告)日：2023-06-08
申请号：US17989015
申请日：2022-11-17
IPC分类号： G01F23/80 , G01F23/284
CPC分类号： G01F23/802 , G01F23/2845
摘要： A modular level measurement system, comprising: sensing circuitry for generating a transmit signal, transmitting the transmit signal, and receiving a reflection signal; processing circuitry for determining the level product based on a timing relation between the transmit signal and the reflection signal; wireless communication circuitry for wirelessly transmitting a signal indicative of the level of the product to a remote receiver; a memory for storing data related to a status of the tank, wherein the modular level measurement system comprises: a first module to be fixed to the tank, including at least the memory and a communication interface; and a second module including at least a communication interface, the second module being configured to be removably attached to the tank having the first module fixed thereto, in such a way that coupling is achieved between the communication interfaces of the first and second modules.
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公开(公告)号：US20220397444A1
公开(公告)日：2022-12-15
申请号：US17775648
申请日：2020-11-11
发明人： Jingdong Zhang , Timothy Hill , Marianne Williams
IPC分类号： G01F25/20 , G01F23/296 , G01F23/284
摘要： The invention provides a method of verifying the health of a liquid level detection device, preferably a vibrating fork level switch, while the device remains in situ. The method includes, independently of the device, verifying if the fork tines are fully wet or fully dry. This step can be carried out by a further, independent, level measuring apparatus.
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公开(公告)号：US11435214B2
公开(公告)日：2022-09-06
申请号：US16914734
申请日：2020-06-29
发明人： Olov Edvardsson
IPC分类号： G01F23/284 , G01S13/88
摘要： The present invention relates a transmission line probe for use in a radar level gauge system configured to determine a filling level (L) and a density of a product contained in a container, wherein the transmission line probe comprises: at least one probe line adapted to guide an electromagnetic transmit signal (ST) towards and at least partly through the product, and to guide an electromagnetic return signal (SR) back from a surface or interface of the product; and a plurality of insulating dielectric beads arranged along the at least one probe line and configured to decrease electromagnetic signal attenuation caused by the product. The present invention also relates to a radar level gauge system comprising such a transmission line probe, and to a corresponding method.
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公开(公告)号：US20220260406A1
公开(公告)日：2022-08-18
申请号：US17588486
申请日：2022-01-31
IPC分类号： G01F23/284 , G01P15/00
摘要： A radar level gauge system for determining a topographic property of a product, comprising a transceiver; a signal transfer element coupled to the transceiver and configured to emit an electromagnetic transmit signal from the transceiver in an emission direction; a propagating member for propagating the transmit signal towards the surface of the product and a reflection signal back towards the transceiver, the propagating member being movably arranged in relation to the signal transfer element and configured to deflect the transmit signal; an elastic system coupled to the signal transfer element and to the propagating member, and arranged to define at least one property of an oscillating movement of the propagating member in relation to the signal transfer element; an actuator arranged to initiate the oscillating movement; and processing circuitry coupled to the transceiver for determining the topographic property based on the transmit signal and the reflection signal.
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公开(公告)号：US20210262847A1
公开(公告)日：2021-08-26
申请号：US17156883
申请日：2021-01-25
IPC分类号： G01F23/284 , F16K37/00
摘要： A valve arrangement for a guided wave radar level gauge including a valve housing holding a movable valve element having a through-opening, the movable valve element being configured to be movable between an open position and a closed position. A probe section arranged in the through-opening of the movable valve element. Upper and lower probe sections are located on respective sides of the movable valve element. A spring-loaded connection assembly is configured to form an electrical connection between the upper and the lower probe section via the probe section in the movable valve element when the movable valve element is in an open position.
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47.发明申请公开(公告)号：US20210215527A1
公开(公告)日：2021-07-15
申请号：US17122252
申请日：2020-12-15
发明人： Mikael Eriksson
IPC分类号： G01F23/284 , G01S13/10 , H01Q1/22 , G01S13/24
摘要： A guided wave radar level gauge for determining a fill level of a product contained in a tank comprising: a transceiver configured to provide a transmit signal, Tx-signal, in the form of a pulse train, having a controllable pulse repetition frequency fTx, and to receive a reflected signal resulting from a reflection of the transmit signal at a surface of the product; a probe connected to the transceiver and configured to propagate the Tx-signal towards the surface and to return the reflected signal to the transceiver, the probe having a known length; and control circuitry configured to determine the fill level based on the received reflected signal, wherein the control circuitry is further configured to set the pulse repetition frequency based on the length of the probe.
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公开(公告)号：US10809114B2
公开(公告)日：2020-10-20
申请号：US16020277
申请日：2018-06-27
发明人： Rickard Uddh , Peter Elmberg
IPC分类号： G01F23/284 , G01S13/08
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. The dielectric filling member includes a main body formed of a polymer material, and at least one structurally reinforced element formed of a modified polymer material providing, the modified polymer material being obtained by modifying the polymer material with a filler material, wherein the at least one structurally reinforced element is integrally formed with the main body by sintering, and forms part of the sealing arrangement.The present invention is based on the realization that a structurally reinforced element, made of a modified polymer material, may be integrated into the main body by sintering.
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公开(公告)号：US10591344B2
公开(公告)日：2020-03-17
申请号：US15641702
申请日：2017-07-05
发明人： Olov Edvardsson
IPC分类号： G01F23/284
摘要： A radar level gauge system comprising a transceiver; a multi-conductor probe comprising a first probe conductor and a second probe conductor extending together from an upper probe end to a lower probe end; a plurality of spacer arrangements distributed along the multi-conductor probe; and processing circuitry for determining the filling level. Each spacer arrangement in the plurality of spacer arrangements comprises a first spacer member configured to reflect a transmit signal as a first spacer reflection signal having a first amplitude; and a second spacer member configured to reflect the transmit signal as a second spacer reflection signal having a second amplitude. The first spacer member and the second spacer member are arranged along the multi-conductor probe so that the first and second spacer reflection signals interact to provide a combined spacer reflection signal having an amplitude lower than each of the first amplitude and the second amplitude.
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50.发明授权公开(公告)号：US10295393B2
公开(公告)日：2019-05-21
申请号：US15281344
申请日：2016-09-30
发明人： Mikael Eriksson
IPC分类号： G01S7/03 , G01S13/88 , G01F23/284 , G01R27/26 , H01Q1/22 , G01F23/00 , F17C13/02 , G01F23/26
摘要： A radar level gauge system comprising: a transceiver arrangement; a first probe to guide a first transmit signal through a surrounding medium towards a product in the tank, and to return a first surface echo signal, the first probe being configured to guide the first transmit signal with a first propagation velocity exhibiting a first dependence on a dielectric constant of the surrounding medium; a second probe to guide a second transmit signal through the surrounding medium towards the product, and to return a second surface echo signal, the second probe being configured to guide the second transmit signal with a second propagation velocity exhibiting a second dependence, different from the first dependence, on the dielectric constant of the surrounding medium; and processing circuitry for determining the filling level based on the first surface echo signal, the second surface echo signal, and a known relation between the first dependence and the second dependence.
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