Patents by Inventor Anders Friedmann

Anders Friedmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250130092
    Abstract: A guided wave radar level gauge for determining a fill level of a product contained in a tank for high-pressure applications including a transceiver, a probe a reference reflector and control circuitry configured to perform a distance measurement to determine a measured distance to the reference reflector; determine a first dielectric constant of a vapor in the tank based on the measured distance to the reference reflector and a reference distance to the reference reflector; acquire a temperature or pressure of the vapor in the tank; determine a second dielectric constant of the vapor in the tank based on the acquired temperature or pressure; and compare a difference between the first and second dielectric constant of the vapor in the tank with a predetermined difference threshold value.
    Type: Application
    Filed: October 7, 2024
    Publication date: April 24, 2025
    Inventors: Anders Friedmann, Häkan Delin, Mikael Eriksson
  • Publication number: 20250085238
    Abstract: A tank arrangement, comprising a tank having a first tank portion and a second tank portion above the first tank portion; an inlet for receiving a substance composition; at least a first radar gauging system arranged at the tank, the first radar gauging system comprising: a first transceiver; a first transmission line probe having an impedance discontinuity spaced apart along the first transmission line probe from the first probe end by a known first distance, the first transmission line probe being arranged with a portion of the first transmission line probe extending from the first probe end to the impedance discontinuity exclusively located in the first tank portion; and first processing circuitry coupled to the first transceiver and configured to estimate a signal propagation property of the substance composition within a first volume surrounding the portion of the first transmission line probe.
    Type: Application
    Filed: August 22, 2024
    Publication date: March 13, 2025
    Inventors: Anders Friedmann, Håkan Delin, Marcus Grahn, Mikael Eriksson
  • Publication number: 20250085152
    Abstract: A radar gauging system comprising a transceiver; a vertically extending transmission line probe coupled to the transceiver and configured to guide a transmit signal from the transceiver through the substance composition and to return a reflection signal resulting from reflection of the transmit signal, the transmission line probe having: a first probe portion configured to provide a first coupling between the transmit signal and the substance composition surrounding the first probe portion; and a second probe portion configured to provide a second coupling, weaker than the first coupling, between the transmit signal and the substance composition surrounding the second probe portion; and processing circuitry configured to estimate, based on a timing relation between the transmit signal and the reflection signal and on a known length of the first probe portion, a signal propagation property of the first level range of the substance composition surrounding the first probe portion.
    Type: Application
    Filed: August 22, 2024
    Publication date: March 13, 2025
    Inventors: Marcus Grahn, Håkan Delin, Anders Friedmann, Mikael Eriksson
  • Patent number: 10816384
    Abstract: A method of determining at least a first interface level of a first interface in a tank containing a stratified substance composition, comprising the steps of generating and transmitting an electromagnetic transmit signal; guiding the transmit signal at least partly through the stratified substance composition; returning an electromagnetic reflection signal resulting from reflection of the transmit signal; receiving, the reflection signal; determining, based on the reflection signal and a timing relation between the reflection signal and the transmit signal, an echo signal exhibiting an echo signal strength as a function of a propagation parameter indicative of position along the probe; and determining, the first interface level based on a first propagation parameter value indicative of a first threshold position for which the echo signal has reached a predetermined first threshold signal strength, and a first offset indicative of a first offset distance from the first threshold position.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: October 27, 2020
    Assignee: ROSEMOUNT TANK RADAR AB
    Inventors: Christer Frövik, Anders Friedmann
  • Publication number: 20190128727
    Abstract: A method of determining at least a first interface level of a first interface in a tank containing a stratified substance composition, comprising the steps of generating and transmitting an electromagnetic transmit signal; guiding the transmit signal at least partly through the stratified substance composition; returning an electromagnetic reflection signal resulting from reflection of the transmit signal; receiving, the reflection signal; determining, based on the reflection signal and a timing relation between the reflection signal and the transmit signal, an echo signal exhibiting an echo signal strength as a function of a propagation parameter indicative of position along the probe; and determining, the first interface level based on a first propagation parameter value indicative of a first threshold position for which the echo signal has reached a predetermined first threshold signal strength, and a first offset indicative of a first offset distance from the first threshold position.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 2, 2019
    Inventors: Christer Frövik, Anders Friedmann