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1. WO2020002369 - RADAR LEVEL GAUGE WITH H01-MODE WAVE TRANSDUCER

Publication Number WO/2020/002369
Publication Date 02.01.2020
International Application No. PCT/EP2019/066904
International Filing Date 25.06.2019
IPC
G PHYSICS
01
MEASURING; TESTING
F
MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
23
Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
22
by measurement of physical variables, other than linear dimensions, pressure, or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
28
by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
284
Electromagnetic waves
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
13
Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
88
Radar or analogous systems, specially adapted for specific applications
G01F 23/284 (2006.01)
G01S 13/88 (2006.01)
CPC
G01F 23/284
G01S 13/88
Applicants
  • ROSEMOUNT TANK RADAR AB [SE/SE]; Box 150 435 23 MÖLNLYCKE, SE
Inventors
  • EDVARDSSON, Olov; SE
  • JIRSKOG, Anders; SE
Agents
  • AWA SWEDEN AB; Box 11394 404 28 GÖTEBORG, SE
Priority Data
16/018,25826.06.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) RADAR LEVEL GAUGE WITH H01-MODE WAVE TRANSDUCER
(FR) JAUGE DE NIVEAU RADAR À TRANSDUCTEUR D'ONDES DE MODE H01
Abstract
(EN)
A radar level gauge having a wave guiding structure arranged to guide a measurement signal towards the surface and to return the reflected signal, and an electromagnetic wave transducer arranged to emit the measurement signal into the wave guiding structure as electromagnetic waves. The electromagnetic wave transducer has a plurality of radiating elements arranged in N-1 concentric feeder rings, where a radius of each feeder ring coincides with a radial zero of an electrical field of the H0N-mode, and feeding circuitry connected to feed the measurement signals from the transceiver circuitry to the radiating elements, thereby causing the electromagnetic wave transducer to excite electromagnetic waves in the H01-mode. With this choice of feeder ring radii, the H0N mode will not be excited.
(FR)
Jauge de niveau radar présentant une structure de guidage d'ondes conçue pour guider un signal de mesure vers la surface et pour renvoyer le signal réfléchi, et un transducteur d'ondes électromagnétiques conçu pour émettre le signal de mesure dans la structure de guidage d'ondes en tant qu'ondes électromagnétiques. Le transducteur d'ondes électromagnétiques comporte une pluralité d'éléments rayonnants agencés en N-1 anneaux d'alimentation concentriques, un rayon de chaque anneau d'alimentation coïncidant avec un zéro radial d'un champ électrique du mode H0N, et des circuits d'alimentation connectés pour acheminer les signaux de mesure des circuits émetteurs-récepteurs aux éléments rayonnants, ce qui permet d'amener le transducteur d'ondes électromagnétiques à exciter des ondes électromagnétiques dans le mode H01. Grâce à ce choix de rayons d'anneaux d'alimentation, le mode H0N ne sera pas excité.
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