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1. WO2020201355 - TIMING CONTROL CIRCUIT FOR GUIDED WAVE RADAR LEVEL TRANSMITTER

Publication Number WO/2020/201355
Publication Date 08.10.2020
International Application No. PCT/EP2020/059257
International Filing Date 01.04.2020
IPC
G01F 23/284 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
23Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
22by 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
28by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
284Electromagnetic waves
CPC
G01F 23/284
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
23Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
22by 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
28by measuring the variations of parameters of electric or acoustic waves applied directly to the liquid or fluent solid material
284Electromagnetic waves
G01S 13/103
GPHYSICS
01MEASURING; TESTING
SRADIO 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
13Systems 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
02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
06Systems determining position data of a target
08Systems for measuring distance only
10using transmission of interrupted pulse modulated waves
103particularities of the measurement of the distance
G01S 13/88
GPHYSICS
01MEASURING; TESTING
SRADIO 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
13Systems 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
88Radar or analogous systems specially adapted for specific applications
G01S 7/282
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
02of systems according to group G01S13/00
28Details of pulse systems
282Transmitters
Applicants
  • ABB SCHWEIZ AG [CH]/[CH]
Inventors
  • MIMEAULT, Yvan
  • COUTURE, Patrick
Agents
  • AIPEX B.V.
Priority Data
16/371,12601.04.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) TIMING CONTROL CIRCUIT FOR GUIDED WAVE RADAR LEVEL TRANSMITTER
(FR) CIRCUIT DE COMMANDE DE SYNCHRONISATION POUR ÉMETTEUR DE NIVEAU RADAR À ONDES GUIDÉES
Abstract
(EN)
In at least one illustrative embodiment, a guided wave radar (GWR) level transmitter may comprise a timing circuit including a first oscillator circuit and a second oscillator circuit, a coincidence circuit configured to generate a coincidence signal indicative of phase shifts created by a difference between first and second frequencies of the first and second oscillator circuits, and a microcontroller configured to (i) determine a stretching factor based on the coincidence signal and at least one of the oscillator signals, (ii) calculate, when the stretching factor is within a first range, a distance to a media surface using the stretching factor, and (iii) adjust, when the stretching factor is outside of a second range, at least one of the first and second oscillator circuits to adjust the difference between the first and second frequencies.
(FR)
Selon au moins un mode de réalisation donné à titre d'exemple, un émetteur de niveau radar à ondes guidées (GWR) peut comprendre un circuit de synchronisation comprenant un premier circuit oscillant et un second circuit oscillant, un circuit de coïncidence conçu pour générer un signal de coïncidence indiquant des décalages de phase créés par une différence entre des première et seconde fréquences des premier et second circuits oscillants, et un microcontrôleur conçu (i) pour déterminer un facteur d'étirement sur la base du signal de coïncidence et d'au moins un des signaux d'oscillateur, (ii) pour calculer, lorsque le facteur d'étirement se trouve dans une première plage, une distance jusqu'à une surface de support à l'aide du facteur d'étirement, et (iii) pour régler, lorsque le facteur d'étirement est à l'extérieur d'une seconde plage, au moins l'un des premier et second circuits oscillants pour ajuster la différence entre les première et seconde fréquences.
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