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1. WO2020069821 - METHOD FOR DETERMINING A MALFUNCTION OF A TEST DEVICE, TEST DEVICE, TANK

Publication Number WO/2020/069821
Publication Date 09.04.2020
International Application No. PCT/EP2019/073970
International Filing Date 09.09.2019
IPC
G01F 23/296 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
296Acoustic waves
G01N 29/44 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
44Processing the detected response signal
G01S 15/88 2006.01
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
15Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
88Sonar systems specially adapted for specific applications
CPC
G01F 23/2965
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
296Acoustic waves
2965measuring wave attenuation
G01N 2291/0228
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2291Indexing codes associated with group G01N29/00
02Indexing codes associated with the analysed material
022Liquids
0228Aqueous liquids
G01N 2291/02809
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2291Indexing codes associated with group G01N29/00
02Indexing codes associated with the analysed material
028Material parameters
02809Concentration of a compound, e.g. measured by a surface mass change
G01N 2291/02836
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2291Indexing codes associated with group G01N29/00
02Indexing codes associated with the analysed material
028Material parameters
02836Flow rate, liquid level
G01N 29/024
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
02Analysing fluids
024by measuring propagation velocity or propagation time of acoustic waves
G01N 29/4427
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
44Processing the detected response signal ; , e.g. electronic circuits specially adapted therefor
4409by comparison
4427with stored values, e.g. threshold values
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE]
Inventors
  • GONZALEZ-BAQUET, Tania
  • WEINMANN, Reinold
  • CESMELI, Levent
  • HOFMANN, Jan Michl
Priority Data
10 2018 216 847.401.10.2018DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZUM ERMITTELN EINER FEHLFUNKTION EINER PRÜFVORRICHTUNG, PRÜFVORRICHTUNG, TANK
(EN) METHOD FOR DETERMINING A MALFUNCTION OF A TEST DEVICE, TEST DEVICE, TANK
(FR) PROCÉDÉ DE DÉTECTION D'UN DYSFONCTIONNEMENT D'UN DISPOSITIF DE TEST, DISPOSITIF DE TEST, ET RÉSERVOIR
Abstract
(DE)
Die Erfindung betrifft ein Verfahren zum Ermitteln einer Fehlfunktion einer Prüfvorrichtung eines Tanks, der dazu ausgebildet ist, eine Flüssigkeit, insbesondere ein flüssiges Abgasnachbehandlungsmittel, aufzunehmen und bereitzustellen, wobei die Prüfvorrichtung dazu ausgebildet ist, eine Eigenschaft der in dem Tank aufbewahrten Flüssigkeit zu ermitteln, und wobei die Prüfvorrichtung einen Ultraschallwandler zum Aussenden von Ultraschallsignalen und zum Empfangen der Ultraschallsignale nach einer Reflexion der Ultraschallsignale an einer in dem Tank befindlichen Reflexionsfläche aufweist, wobei der Ultraschallwandler zum Aussenden eines ersten Ultraschallsignals angesteuert wird. Es ist vorgesehen, dass ein Zeitraum vorgegeben wird, der nach dem Ansteuern des Ultraschallwandlers beginnt und vor dem zu erwartenden Zeitpunkt, zu dem das erste Ultraschallsignal nach einer Reflexion an der Reflexionsfläche auf den Ultraschallwandler trifft, endet, wobei eine Ist- Vibration des Ultraschallwandlers während des Zeitraums überwacht wird, die erfasste Ist-Vibration mit einer zu erwartenden Soll-Vibration verglichen wird, und wobei eine Fehlfunktion des Ultraschallwandlers festgestellt wird, wenn erfasst wird, dass die während des Zeitraums erfasste Ist-Vibration von der Soll- Vibration um einen vorgebbaren Schwellenwert abweicht.
(EN)
The invention relates to a method for determining a malfunction of a test device of a tank which is designed to hold and make available a fluid, in particular a fluid exhaust gas after-treatment medium, wherein the test device is designed to determine a property of the fluid stored in the tank, and wherein the test device has an ultrasonic transducer for emitting ultrasonic signals and for receiving the ultrasonic signals after reflection of the ultrasonic signals at a reflection face located in the tank, wherein the ultrasonic transducer is actuated to emit a first ultrasonic signal. There is provision that a time period is predefined which starts after the actuation of the ultrasonic transducer and ends before the expected time at which the first ultrasonic signal arrives at the ultrasonic transducer after reflection at the reflection face, wherein an actual vibration of the ultrasonic transducer is monitored during the time period, the detected actual vibration is compared with an expected setpoint vibration, and wherein a malfunction of the ultrasonic transducer is ascertained if it is detected that the actual vibration detected during the time period differs from the setpoint vibration by a predefinable threshold value.
(FR)
L'invention concerne un procédé pour déterminer un dysfonctionnement d'un dispositif de test d'un réservoir qui est conçu pour recevoir et fournir un liquide, en particulier un agent liquide de post-traitement des gaz d'échappement, le dispositif de test étant conçu pour déterminer une propriété du liquide stocké dans le réservoir, et le dispositif de test comportant un transducteur ultrasonore pour émettre des signaux ultrasonores et pour recevoir les signaux ultrasonores après réflexion des signaux ultrasonores sur une surface de réflexion située dans le réservoir, le transducteur ultrasonore étant commandé pour émettre un premier signal ultrasonore. Selon l'invention, une période de temps qui commence après le déclenchement du transducteur ultrasonore et se termine avant l'heure prévue à laquelle le premier signal ultrasonore frappe le transducteur ultrasonore après une réflexion sur la surface de réflexion est spécifiée, ce qui permet de contrôler une vibration réelle du transducteur ultrasonore pendant cette période, la vibration réelle détectée est comparée à une vibration cible attendue, et un dysfonctionnement du transducteur ultrasonore étant déterminé s'il est détecté que la vibration réelle détectée pendant la période s'écarte de la vibration cible d'une valeur seuil prédéterminable.
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