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WO2022249031A1 - Procédé et système de mesure d'un niveau de liquide à l'intérieur d'un récipient hermétiquement fermé - Google Patents

Procédé et système de mesure d'un niveau de liquide à l'intérieur d'un récipient hermétiquement fermé Download PDF

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Publication number
WO2022249031A1
WO2022249031A1 PCT/IB2022/054805 IB2022054805W WO2022249031A1 WO 2022249031 A1 WO2022249031 A1 WO 2022249031A1 IB 2022054805 W IB2022054805 W IB 2022054805W WO 2022249031 A1 WO2022249031 A1 WO 2022249031A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
magnetic field
spatial orientation
static magnetic
induction vector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2022/054805
Other languages
English (en)
Inventor
Artur Frankiewicz
Marek Gabrys
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aiut Sp Z OO
Original Assignee
Aiut Sp Z OO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from EP21175775.2A external-priority patent/EP4096105B1/fr
Priority claimed from EP22461538.5A external-priority patent/EP4266588A1/fr
Application filed by Aiut Sp Z OO filed Critical Aiut Sp Z OO
Publication of WO2022249031A1 publication Critical patent/WO2022249031A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
    • H04B5/48—Transceivers

Definitions

  • the present invention generally relates to the field of containers for storing liquid products, and to measuring devices for determining and monitoring a fill level of a product stored inside a metal container by means of a electromagnetic beam transit time measuring method inside of hermetically closed container made of metal. More specifically, the subject matter of the present invention is a method and a system for measuring a level of liquid inside of a hermetically closed container for pressurized liquid gas, such as LPG (liquefied petroleum gas) or LNG (liquified natural gas), utilizing a fluid level sensor (a microwave fluid level sensor or an optical time of flight level sensor).
  • LPG liquid petroleum gas
  • LNG liquid natural gas
  • Various devices for monitoring and measuring a fill level of a liquid medium in a container are presently known. These are for example mechanical float level indicators, magnetostrictive probes, ultrasound sensors and radar (microwave) tank gauges.
  • Known radar tank gauge operates on the principle of a microwave transit time measuring method for determining the fluid level in a container.
  • the filling level of the medium in a container is determined based on the transit time of the measurement signal being a distance between microwaves transmitted via an antenna towards the surface of the medium and microwaves reflected on the surface of the medium and received by a transceiver.
  • Known radar tank gauges that operate on containers made of metal require a hole in the container in order to install the sensor on the tank. Installing such a known gauge inside such a container does not make sense due to lack of communication of the gauge with outside of the container.
  • WO 2003/046491 A1 discloses an antenna for level measurement to be protected from aggressive chemical media and high temperatures by at least partial filling with a dielectric material or a disk-shaped dielectric element.
  • the European patent application no. EP 21175775.2 allows to overcome the problem of lack of communication between a microwave fluid level sensor located inside of hermetically closed container made of metal and the outside of the container.
  • the invention relates generally to digital wireless communication through a barrier made of a conductive material. More specifically, the invention relates to a method and system for performing such communication, enabling communication with devices placed inside a sealed container, preferably made of metal, using a slowly varying magnetic field.
  • the objective of the present invention is to provide a very accurate solution for measuring a fill level of a liquid medium in a closed container which eliminates the above-indicated drawbacks.
  • the container does not have any holes or leads to allow installation of the sensor on the outside of the container, therefore the sensor is installed inside the container.
  • the container keeps high pressure tolerance due to full-metal construction.
  • a fluid level sensor which is placed inside the container performs measurements of the level of liquid inside the container as follows:
  • the fluid level sensor emits a beam, for example a microwave beam, towards the inside of the container.
  • a part of the emitted beam gets back after reflection from the surface of the liquid in the container.
  • the fluid level sensor receives back that part of the beam reflected from the surface of the liquid.
  • time difference or frequency difference between the emitted beam and the beam reflected from the surface of the liquid inside the container and received back by the fluid level sensor one can estimate the level of the liquid. Based on this estimation a fill level of the liquid can be determined.
  • the fluid level sensor may be configured and programmed for performing such estimations.
  • the fluid level sensor may be a microwave fluid sensor level emitting and receiving a microwave beam, or an optical time of flight sensor.
  • the senor communicates with an external communication device using the method described in the aforementioned European patent application no. EP21175775.2, keeping therefore ability to read on the outside the level of the liquid inside the container.
  • a barrier in this case a barrier is a wall of the container
  • a conductive material preferably metal
  • the method comprising the following steps: a.
  • a fluid lever sensor that is installed inside of the container has to be able to work under very high ambient pressure, therefore has to be fully sealed, e.g. with epoxy resin or similar substance which is not affected by high ambient pressure and temperature.
  • the present invention allows to obtain very high precision measurement by the sensor inside the container and ability to read the measured value by the device installed outside the container.
  • the container keeps high pressure tolerance due to full steel construction.
  • FIG. 1 is an schematic view of a liquid level measuring system according to the preferred embodiment of the present invention.
  • Tanks for storing fluids like petrol and other flammable products are in general metal containers which are tightly sealed for not allowing any vapors going out of the container and not allowing any substances going into the container. Some flammable products are stored under pressure which means the pressure in the container is higher than the pressure outside the container.
  • FIG. 1 shows a liquid level measuring system according to a preferred embodiment of the present invention.
  • a container 1 is a metal tank for storing pressurized liquid gas, such as LPG (liquefied petroleum gas) or LNG (liquified natural gas).
  • LPG liquefied petroleum gas
  • LNG liquid natural gas
  • a fluid level sensor 4 in the discussed embodiment a microwave fluid level sensor, is mounted inside of the container 1.
  • the container 1 is hermetically closed and it is made of a conductive material, preferably of metal.
  • the microwave fluid level sensor 4 emits a microwave beam 8 via a lens 9 towards the inside of the container 1. A part of the emitted microwave beam gets back after reflection from the surface 7 of the liquid in the container 1.
  • the microwave fluid level sensor 4 receives back that part of the signal - reflected from the surface of 7 the liquid.
  • the microwave fluid level sensor 4 By calculating time difference or frequency difference between the emitted microwave beam and the microwave beam reflected from the surface 7 of the liquid inside the container 1 and received back by the microwave fluid level sensor 4, one can estimate the level of the liquid. Based on this estimation a fill level of the liquid can be determined.
  • the microwave fluid level sensor 4 may be configured and programmed for performing such estimations.
  • the microwave fluid level sensor 4 is capable to receive all reflected beams (that is beams reflected from different surfaces including the gas surface) and select only the beam reflected from the surface of the liquid stored in the container 1 for measuring the level of the liquid.
  • Algorithms for selection of the right beam based on signal analyze algorithms like FFT (Fast Fourier Transformation) and/or adaptive algorithms based on machine learning algorithms can be used.
  • the fluid level sensor 4 communicates by its internal communication means with an external communication device 5 using a method of digital wireless communication 6 described in the aforementioned European patent application no. EP21175775.2 and briefly described above.
  • a system for performing a digital wireless communication 6 as described in EP21175775.2 can be preferably used.
  • the fluid lever sensor 4 may be equipped with a power source, for example a battery 3, a transmitter, a digital information encoder in the form of a static magnetic field generator with a stepwise variable spatial orientation of a magnetic induction vector composed of an at least one induction coil excited with a current of stepwise variable intensity and polarity.
  • the external communication device may be equipped with a receiver configured to read the spatial orientation of the magnetic induction vector of the static magnetic field in at least two geometric dimensions, a reading system and a digital information decoder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

La présente invention concerne un procédé et un système de mesure d'un niveau de liquide à l'intérieur d'un récipient hermétiquement fermé pour un gaz liquide sous pression, par exemple du GPL (gaz de pétrole liquéfié) ou du GNL (gaz naturel liquéfié), à l'aide d'un capteur de niveau de fluide,par exemple un capteur de niveau de fluide à micro-ondes ou un capteur optique de niveau par temps de vol.
PCT/IB2022/054805 2021-05-25 2022-05-23 Procédé et système de mesure d'un niveau de liquide à l'intérieur d'un récipient hermétiquement fermé Ceased WO2022249031A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
EP21175775.2A EP4096105B1 (fr) 2021-05-25 2021-05-25 Procede de communication numerique sans fil a travers une barriere constituee d'un materiau conducteur, systeme permettant d'effectuer une telle communication, et systeme de surveillance du contenu d'un cylindre
EP21175775.2 2021-05-25
EP22461538.5 2022-04-23
EP22461538.5A EP4266588A1 (fr) 2022-04-23 2022-04-23 Récipient pour gaz liquide sous pression et système de mesure de niveau de liquide
EP22169869.9 2022-04-25
EP22169869.9A EP4096106A1 (fr) 2021-05-25 2022-04-25 Procede de communication numerique sans fil a travers une barriere constituee d'un materiau conducteur, systeme permettant d'effectuer une telle communication, et systeme de surveillance du contenu d'un cylindre

Publications (1)

Publication Number Publication Date
WO2022249031A1 true WO2022249031A1 (fr) 2022-12-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2022/054805 Ceased WO2022249031A1 (fr) 2021-05-25 2022-05-23 Procédé et système de mesure d'un niveau de liquide à l'intérieur d'un récipient hermétiquement fermé

Country Status (1)

Country Link
WO (1) WO2022249031A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046491A1 (fr) 2001-11-26 2003-06-05 Vega Grieshaber Kg Systeme d'antenne conçu pour un dispositif de mesure de niveau
US20100069000A1 (en) * 2007-02-23 2010-03-18 Nec Corporation Semiconductor device performing signal transmission by using inductor coupling
US20140155098A1 (en) * 2011-03-07 2014-06-05 Isis Innovation Limited System for providing information and associated devices
WO2020237915A1 (fr) * 2019-05-31 2020-12-03 中科新声(苏州)科技有限公司 Appareil de communication sans fil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046491A1 (fr) 2001-11-26 2003-06-05 Vega Grieshaber Kg Systeme d'antenne conçu pour un dispositif de mesure de niveau
US20100069000A1 (en) * 2007-02-23 2010-03-18 Nec Corporation Semiconductor device performing signal transmission by using inductor coupling
US20140155098A1 (en) * 2011-03-07 2014-06-05 Isis Innovation Limited System for providing information and associated devices
WO2020237915A1 (fr) * 2019-05-31 2020-12-03 中科新声(苏州)科技有限公司 Appareil de communication sans fil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LARA-CASTRO M ET AL: "Portable signal conditioning system of a MEMS magnetic field sensor for industrial applications", MICROSYSTEM TECHNOLOGIES, BERLIN, DE, vol. 23, no. 1, 18 January 2016 (2016-01-18), pages 215 - 223, XP036140985, ISSN: 0946-7076, [retrieved on 20160118], DOI: 10.1007/S00542-016-2816-4 *

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