WO1988007175A1 - Dispositif de mesure de niveau - Google Patents

Dispositif de mesure de niveau Download PDF

Info

Publication number
WO1988007175A1
WO1988007175A1 PCT/DE1988/000072 DE8800072W WO8807175A1 WO 1988007175 A1 WO1988007175 A1 WO 1988007175A1 DE 8800072 W DE8800072 W DE 8800072W WO 8807175 A1 WO8807175 A1 WO 8807175A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
sound
sound wave
conductor
container
Prior art date
Application number
PCT/DE1988/000072
Other languages
German (de)
English (en)
Inventor
Günter Gerlach
Peter Hauler
Walter Jansche
Peter Rapps
Erich Zabler
Original Assignee
Robert Bosch Gmbh
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
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1988007175A1 publication Critical patent/WO1988007175A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring 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 by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2962—Measuring transit time of reflected waves

Definitions

  • the invention proceeds from a device for measuring the Greet ⁇ height of a liquid in a container after the Gat ⁇ processing of claim 1 or 2. It is of claim 'generally bekann ⁇ ter prior art, this measurement nungsmeßvorraum with a Ultraschallentfer- perform.
  • An ultrasound generator emits sound waves in the direction of the liquid. The sound waves reflected on the surface of the liquid are received by an ultrasound sensor. If the ultrasound system is in a fixed spatial relationship to the container, a conclusion can be drawn from the transit time measurement of the ultrasound signal as to the level of the liquid in the container.
  • the device according to the invention for measuring the filling level of a liquid in a container has the advantage over the fact that the measuring method is independent of the shape of the container.
  • first sound-conducting means connected to a sound wave generator and second sound-conducting means connected to a sound wave transducer are provided, which are immersed in the liquid.
  • sound-conducting means connected to the sound wave generator and to the sound wave transducer and leading through the liquid are provided.
  • a sound wave conduction takes place via the liquid between the areas of the sound conductor immersed in the liquid.
  • the formwork line in the formwork conductor itself is superimposed on this formwork line.
  • a transit time or phase difference occurs between the generated and recorded sound signal, which is determined in an evaluation circuit. This difference is a measure of the fill level of the liquid in the container, the shape of the container having almost no influence on the measurement result.
  • the measures listed in the subclaims enable advantageous further developments and improvements of the device specified in the two claims 1 and 2.
  • the measuring range is spread when the sound conductors have a coil at least in the area lying in the liquid. This winding is preferably provided in the vicinity of the bottom of the container for the precise detection of the residual liquid.
  • the device according to the invention is particularly suitable for measuring the fill level of the liquid in a fuel tank of a motor vehicle. Further details and advantageous developments of the device according to the invention result from further subclaims.
  • Figure 1 shows a first
  • Figure 2 shows a second
  • Figure 3 shows a third embodiment of the inventive device.
  • FIG. 1 shows a liquid 11 located in a container 10, the level of which is to be measured.
  • a first and second sound conductor 12, 13 are immersed in the liquid 11 at a distance from one another.
  • the first sound conductor 12 is connected to a sound wave generator 14 arranged outside the liquid 11.
  • the second sound conductor 13 is connected to a sound wave sensor 15 arranged outside the liquid 11.
  • the part of the first sound conductor 12 projecting into the liquid 11 has the reference number 16 and that of the second sound conductor 13 has the reference number 17.
  • the region in the liquid 11 lying between the first and second sound conductor 12, 13 is provided with the reference number 18.
  • a first fill level 19 and a lower fill level 20 are shown, which are entered with dashed lines.
  • a generator 21 is provided, which emits a signal both to the sound wave generator 14 and to an evaluation device 22.
  • the evaluation device 22 is also connected to the sound wave pickup 15 and also to a display device 23.
  • FIG. 2 shows a second exemplary embodiment of the device according to the invention.
  • Those parts of FIG. 2 which correspond to the parts shown in FIG. 1 have the same designations in FIG. train numbers as in FIG. 1.
  • the difference between the device according to FIG. 1 and that according to FIG. 2 lies in the different design of the sound conductor.
  • a continuous sound conductor 30 protruding into the liquid 11 is provided, which connects the sound wave generator 14 arranged outside the liquid 11 to the sound wave receiver 15 also arranged outside the liquid 11.
  • the sound conductor 30 In the area 31 of the container 10 near the bottom, the sound conductor 30 has a coil 32.
  • the area of the sound conductor 30 lying in the liquid 11 bears the reference number 33.
  • the rest of the device corresponds to the device shown in FIG.
  • Figure 3 shows a third embodiment of the device according to the invention. Those parts of FIG. 3 which correspond to the parts shown in FIG. 2 have the same reference numerals as in FIG. 2. The difference between the device according to FIG. 2 and that according to FIG. 3 lies in the different configuration of the winding 34.
  • the winding 34 is designed such that the sound conductor 30 is immersed in the liquid 11 in the manner of a double spiral. The remaining device corresponds to the device shown in FIG. 2.
  • the device according to FIG. 1 operates as follows: the generator 21 generates a signal, preferably in the ultrasonic range, which the sound wave generator converts into vibrations which are conducted into the liquid 11 via the first sound conductor 12.
  • the part 16 of the first sound conductor 12 projecting into the liquid 11 transmits the vibration to the liquid 11.
  • the sound wave pickup 15 sets the received sound waves in an electrical signal which, like the original signal emitted by generator 21, is fed to evaluation device 22.
  • a phase or transit time difference between the original and the received signal is determined, which is suitably transformed, and is displayed in the display device 23 as a measure of the filling level of the liquid 11 in the container 10.
  • the phase or transit time difference is smaller when the liquid 11 is at the first filling level 19 and correspondingly larger when it is at the lower filling level 20.
  • the first and second sound conductor 12 is preferably wire-shaped. In the areas 16, 17 of the two sound conductors 12, 13 projecting into the liquid 11, a planar design of the two sound conductors 12, 13 can also be provided. A spiral of one of the two sound conductors 12, 13 or both sound conductors 12, 13 in certain areas in the liquid 11 leads to a spreading of the measuring range.
  • FIGS. 2 and 3 work as follows:
  • the sound wave emanating from the sound wave generator 14 reaches the sound wave pickup 15 via the sound conductor 30 leading through the liquid 11.
  • This sound vibration is superimposed on a second sound line taking place between the areas 33 of the sound conductor 30 lying in the liquid 11, the phase position depending on the liquid height the vibration transmitted by the liquid 11 changes with respect to the original signal.
  • This phase or transit time change is determined in the manner already described in the evaluation device 22 and is displayed in a suitable manner with the display device 23 as a measure of the filling level of the liquid in the container 10.
  • the sound conductor 30 has a coil 32 in the region 31 of the container .10 near the bottom. With this spiral there is a spread of Measuring range in the level measurement of the residual liquid.
  • the sound conductor 30 also has a coil 34.
  • This winding extends in the vertical direction in the liquid 11.
  • the winding 34 shown in FIG. 3 is designed such that the part of the sound conductor connected to the sound wave generator 14, which leads into the liquid 11, and the part connected to the sound wave receiver 15, part of the sound conductor leading out of the liquid 11 are wound parallel to one another with a certain distance.
  • the spiral 34 results in a spreading of the measuring range in the vertical direction, which is formed in a specific application, preferably in a certain level range of the liquid 11.
  • the sound conductor 30 is divided into two parts 12, 13 according to FIG. 1.
  • the sound conductor 30 according to FIG. 3 is severed, for example, in the region 31 of the container 10 near the bottom, so that two parts 12, 13 are formed.
  • the spread of the measuring range when measuring the fill level of the residual liquid is advantageous if the device according to the invention is used, for example, as a fill level indicator for the fuel in the tank of a motor vehicle.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Un dispositif sert à mesurer le niveau d'un liquide (11) dans un récipient (10). Un premier conducteur acoustique (12) transmet les vibrations acoustiques émises par un générateur d'ondes sonores (14) au liquide (11), où celles-ci se propagent, sont captées par un deuxième conducteur acoustique (13) et fournies à un capteur d'ondes sonores (15). On évalue alors la différence entre les phases ou entre la durée de propagation des signaux originaux et des signaux captés, qui varie en fonction du niveau (19, 20) du liquide (11). Dans un mode spécial de réalisation, un conducteur acoustique (30) immergé dans le liquide (11) est relié tant au générateur d'ondes sonores (14) qu'au capteur d'ondes sonores (15). Le dispositif convient particulièrement pour mesurer le niveau de carburant dans le réservoir d'un véhicule à moteur si l'on donne au conducteur acoustique une configuration spéciale hélicoïdale à proximité du fond (31) du récipient (10).
PCT/DE1988/000072 1987-03-07 1988-02-15 Dispositif de mesure de niveau WO1988007175A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873707385 DE3707385A1 (de) 1987-03-07 1987-03-07 Fuellstandsmessvorrichtung
DEP3707385.0 1987-03-07

Publications (1)

Publication Number Publication Date
WO1988007175A1 true WO1988007175A1 (fr) 1988-09-22

Family

ID=6322527

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1988/000072 WO1988007175A1 (fr) 1987-03-07 1988-02-15 Dispositif de mesure de niveau

Country Status (2)

Country Link
DE (1) DE3707385A1 (fr)
WO (1) WO1988007175A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005013269A1 (de) * 2005-03-22 2006-09-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Bestimmung des Flüssigkeitsstandes einer flüssigen Phase über eine Ultraschall-Laufzeitmessung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3929344A1 (de) * 1989-01-19 1990-07-26 Holzer Walter Fuellstandsanzeige
DE3912783A1 (de) * 1989-04-19 1990-10-25 Bayerische Motoren Werke Ag Fuellstands-messvorrichtung fuer kraftfahrzeuge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222929A (en) * 1964-09-21 1965-12-14 Henry P Kalmus Augmented-signal mechanical wave depth gauge
FR2402861A1 (fr) * 1977-09-13 1979-04-06 Marconi Co Ltd Capteur du niveau d'un liquide
WO1983002001A1 (fr) * 1981-11-27 1983-06-09 Motorola Inc Dispositif de mesure de volume par pression sonore

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3038268A1 (de) * 1980-10-10 1982-05-27 Josef Heinrichs Meßgerätebau, 5000 Köln Messwertgeber fuer ultraschall-messgeraete
FR2565345B1 (fr) * 1984-05-29 1988-10-14 Renault Dispositif de mesure par ultrasons du niveau et/ou du volume d'un liquide dans un recipient

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222929A (en) * 1964-09-21 1965-12-14 Henry P Kalmus Augmented-signal mechanical wave depth gauge
FR2402861A1 (fr) * 1977-09-13 1979-04-06 Marconi Co Ltd Capteur du niveau d'un liquide
WO1983002001A1 (fr) * 1981-11-27 1983-06-09 Motorola Inc Dispositif de mesure de volume par pression sonore

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005013269A1 (de) * 2005-03-22 2006-09-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Bestimmung des Flüssigkeitsstandes einer flüssigen Phase über eine Ultraschall-Laufzeitmessung

Also Published As

Publication number Publication date
DE3707385A1 (de) 1988-09-15

Similar Documents

Publication Publication Date Title
DE2844143C2 (de) Flüssigkeitspegel-Meßgerät
EP0489051B1 (fr) Procede et dispositif de mesure en vue de determiner le niveau dans des recipients a liquides, de preference des installations de reservoirs.
EP0062272B1 (fr) Méthode et dispositif pour contrôler ou mesurer l'épaisseur de couches de matière
DE2741060C2 (de) Verfahren und Vorrichtung zur Erfassung der Zustandsänderung einer Flüssigkeit
DE2839634A1 (de) Fluessigkeitsstand-messgeraet
DE2918324A1 (de) Verfahren und ultraschallvorrichtung zur messung des fuellstands einer fluessigkeit
DE4025326A1 (de) Verfahren und vorrichtung zu fuellstandsmessung
DE10103056A1 (de) Mengenmeßsystem und -sonde
DE10239268A1 (de) Verfahren und Vorrichtung zur Kontrolle von Rohrleitungen innerhalb von Rohren
EP1573276B1 (fr) Dispositif de positionnement d'un appareil de mesure de debit sous forme de pince de serrage sur un contenant
DE3025363A1 (de) Gabelstapler mit einer ultraschallmessvorrichtung fuer die gabelhoehe
CH617770A5 (fr)
EP1084383B1 (fr) Procede et dispositif pour determiner le niveau de remplissage de recipients
DE2636401B2 (de) Verfahren zur automatischen Erkennung von Ultraschallanzeigen
DE3723933A1 (de) Verfahren zum erfassen einer kleinflaechigen, nahezu punktfoermigen und weitgehend kraeftefreien beruehrung zwischen einer sonde und einem festen gegenstand, sowie beruehrungsdetektor
WO1988007175A1 (fr) Dispositif de mesure de niveau
DE19934876A1 (de) Füllstandsmeßsystem
DE19800054A1 (de) Meßvorrichtung für eine Kraftstoffanzeige
DE19718526C1 (de) Verfahren zur Bestimmung des Füllzustandes eines Fahrzeug-Brennstofftankes
DE2734739C2 (de) Vibrationsdraht-Spannungsmesser
DE19964592B4 (de) Schwingungsmeßgerät
DE3912783A1 (de) Fuellstands-messvorrichtung fuer kraftfahrzeuge
DE1205305B (de) Einrichtung zur kontinuierlichen Messung des Fuellstandes eines eine Fluessigkeit enthaltenden Behaelters mittels Schallwellen
WO2002073123A1 (fr) Tete palpeuse dotee d'une tare
DE19710599A1 (de) Füllstandsmeßsystem

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE