DE10209255B4 - ultrasonic device - Google Patents

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Publication number
DE10209255B4
DE10209255B4 DE2002109255 DE10209255A DE10209255B4 DE 10209255 B4 DE10209255 B4 DE 10209255B4 DE 2002109255 DE2002109255 DE 2002109255 DE 10209255 A DE10209255 A DE 10209255A DE 10209255 B4 DE10209255 B4 DE 10209255B4
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volume
lines
sensor system
low
ultrasonic
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DE10209255A1 (en
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Santer Dr. Zur Horst-Meyer
Hans-Joachim Münch
Ronald John
Werner Krause
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Sonotec Dr Zur Horst Meyer & M
Sonotec Dr Zur Horst-Meyer & Muench oHG
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Sonotec Dr Zur Horst Meyer & M
Sonotec Dr Zur Horst-Meyer & Muench oHG
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating 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
    • G01N29/02—Analysing fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating 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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/045—External reflections, e.g. on reflectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/101—Number of transducers one transducer

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

Ultraschalleinrichtung zur Überwachung flüssiger Medien in geringvolumigen Leitungen, mit einer Mikrovolumenmesskammer (2), welche in einer geringvolumigen Leitung eingeordnet ist und ein Ultraschall-Sensorsystem (1) aufweist, wobei die Anregungsdauer des Ultraschall-Sensorsystems zur Aussendung einzelner Impulse 0,1 bis 0,3 der Laufzeit der von der Kammerinnengeometrie reflektierten Ultraschallechos beträgtUltrasonic device for monitoring liquid media in low-volume lines, with a micro-volume measuring chamber (2), which is arranged in a low-volume line and has an ultrasonic sensor system (1), the duration of excitation of the ultrasonic sensor system for sending individual pulses 0.1 to 0, 3 is the running time of the ultrasonic echoes reflected by the chamber interior geometry

Figure 00000001
Figure 00000001

Description

Die Erfindung betrifft eine Ultraschalleinrichtung zur Überwachung flüssiger Medien in geringvolumigen Leitungen, innerhalb betrieblicher Prozesse.The invention relates to an ultrasound device for surveillance liquid Media in low-volume lines, within operational processes.

Zur Überwachung flüssiger Medien in geringvolumigen Leitungen werden bisher unterschiedliche Prinzipien mit wechselndem Erfolg angewendet. Ziel der Überwachung ist eine Kontrolle der Anwesenheit flüssiger Medien in den Leitungen.For monitoring liquid media So far, different principles have been used in low-volume lines applied with varying success. The aim of monitoring is control the presence of liquid Media in the lines.

So erfolgen Überwachungen mittels Prüfung der Wärmeleitfähigkeit oder unter Nutzung der elektrischen Leitfähigkeit, jeweils mit erheblichem zusätzlichen Aufwand (vgl. DE 44 16 892 A1 , DE 197 47 273 A1 ).Monitoring is carried out by checking the thermal conductivity or using the electrical conductivity, each with considerable additional effort (cf. DE 44 16 892 A1 . DE 197 47 273 A1 ).

Bekannt sind auch optische Kontrollen, die allerdings eine optische Transparenz der geringlumigen Leitungen und saubere Oberflächen dieser Leitungen voraussetzt (vgl. DE 43 36 520 C2 , DE 198 33 766 A1 ).Optical controls are also known, but this presupposes an optical transparency of the low-lumen lines and clean surfaces of these lines (cf. DE 43 36 520 C2 . DE 198 33 766 A1 ).

Weiterhin bekannt ist auch die Anwendung mechanischer Einrichtungen, wobei als Sensoren größenmäßig minimierte Stimmgabeln verwendet werden. Auch in das Medium eintauchende Sensoren werden beschrieben. Diese engen jedoch das geringe Volumen noch mehr ein.The use of mechanical is also known Facilities, with tuning forks minimized in size as sensors be used. Also be immersed in the medium described. However, these narrow the small volume even more.

Ferner ist aus dem Stand der Technik eine Messkammer für den Laborbetrieb mit geringeren Volumina bekann, die zur Ermittlung physikalischer Zustände von definierten Flüssigkeiten im Durchschallungsverfahren bei hohen Frequenzen bis 145 MHz mit Stehwellenmustern arbeitet, die durch pulsmodulierte Frequenzen erzeugt werden. (vgl. US 3807 222 A und F. Eggers et al in J. Phys. E. Sci. Instrum. Vol. 14, H.1, 1981, S. 113–116)Furthermore, a measuring chamber for laboratory operation with smaller volumes is known from the prior art, which works to determine physical states of defined liquids in the transmission method at high frequencies up to 145 MHz with standing wave patterns which are generated by pulse-modulated frequencies. (see. US 3807 222 A and F. Eggers et al in J. Phys. E. Sci. Instrum. Vol. 14, H.1, 1981, pp. 113-116)

Eine Schwierigkeit für alle bekannten Methoden ist das geringe Volumen der Flüssigkeitsmenge in solchen Leitungen – die das Kontrollergebnis mit erheblichen Fehlern behalten oder ausschließen kann.A difficulty for everyone known Methods is the small volume of the amount of liquid in such lines - that is Can keep or exclude control results with significant errors.

Ein weiteres Problem solcher Zustandskontrollen besteht darin, dass derartige geringvolumige Leitungen überwiegend nicht isoliert oder einzeln verlegt werden, sondern Bestandteil größerer Systeme bzw. Anlagen sind – in denen kaum Platz für zusätzliche Mess- bzw. Kontrolleinrichtungen größeren Ausmaßes vorhanden ist.Another problem with such condition checks is that such low-volume lines predominantly not insulated or laid individually, but an integral part larger systems or plants are - in who hardly have room for additional Measuring or control devices are available on a larger scale.

Die Aufgabe der Erfindung besteht deshalb darin, eine Ultraschalleinrichtung zur Überwachung flüssiger Medien in geringvolumigen Leitungen mit geringen Abmessungen zu entwickeln, die zudem eine ausreichende Signalqualität gewährleistet.The object of the invention is therefore in an ultrasonic device for monitoring liquid media to develop in low-volume lines with small dimensions, which also ensures adequate signal quality.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Patentanspruches 1 gelöst.According to the invention, this object is achieved by Features of claim 1 solved.

Zweckmäßige Ausgestaltungen der Erfindung sind in den Patentansprüchen 2 und 3 angegeben.Useful embodiments of the invention are in the claims 2 and 3 specified.

Danach besteht die erfindungsgemäße Ultraschalleinrichtung aus einer, in eine geringvolumige Leitung (3) eingeordnete Mikrovolumenmesskammer (2) mit einem Ultraschall-Sensorsystem (1), wobei die Anregungsdauer des Ultraschall-Sensor-Systems zur Aussendung einzelner Impulse 0,1 bis 0,3 der Laufzeit der von der Kammerinnengeometrie reflektierten Ultraschallechos beträgt.According to this, the ultrasound device according to the invention consists of a line in a small volume ( 3 ) arranged micro volume measuring chamber ( 2 ) with an ultrasonic sensor system ( 1 ), the excitation period of the ultrasound sensor system for sending out individual pulses being 0.1 to 0.3 of the transit time of the ultrasound echoes reflected by the chamber interior geometry.

Die Oberfläche des Ultraschall-Sensorsystem (1) ist inert gegenüber den Medien in den Leitungen und das System hat teilweise direkten Kontakt zu den Medien in den Leitungen.The surface of the ultrasonic sensor system ( 1 ) is inert to the media in the lines and the system is partially in direct contact with the media in the lines.

Eine solche erfindungsgemäße Einrichtung zur Überwachung flüssiger Medien in geringvolumigen Leitungen weist geringe äußere Abmessungen auf und ist dadurch universell zu positionieren. Die Anordnung der zugehörigen elektronischen Ansteuer- und Auswerteschaltung erfolgt üblicherweise extern.Such a monitoring device according to the invention liquid Media in low-volume lines has small external dimensions and can therefore be positioned universally. The arrangement of the associated electronic The control and evaluation circuit is usually carried out externally.

Vorteilhaft ist weiterhin der direkte Kontakt eines Teiles der Oberfläche eines Ultraschall-Sensorsystems mit den Flüssigkeiten in geringvolumigen Leitungen durch die direkte Einordnung einer Mikrovolumenmesskammer (2) in geringvolumigen Leitungen.Another advantage is the direct contact of part of the surface of an ultrasound sensor system with the liquids in low-volume lines through the direct arrangement of a micro-volume measuring chamber ( 2 ) in low-volume lines.

Damit reichen auch geringe Flüssigkeits-Volumina in diesen Leitungen für eine Information zur Überwachung aus.This means that even small volumes of liquid are sufficient in these lines for monitoring information out.

Dadurch ist die erfindungsgemäße Ultraschalleinrichtung geeignet für solche sensiblen Anwendungen, wie in der Biotechnologie, der Medizintechnik, für analytische Zwecke sowie bei Versorgungsleitungen u.a. für Brenn- und Treibstoffe.This makes the ultrasound device according to the invention suitable for such sensitive applications as in biotechnology, medical technology, for analytical Purposes as well as for supply lines, etc. for fuels.

Die Erfindung wird nachfolgend anhand eines Beispiels erläutert.The invention is described below an example explained.

Beispielexample

Eine geringvolumige Rohrleitung (3) dient in einer umfangreichen Vorrichtung als Versorgungsleitung für Kraftstoffe.A low-volume pipeline ( 3 ) serves as a supply line for fuels in an extensive device.

Zur Überwachung der Anwesenheit von Kraftstoff ist in diese Leitung eine Mikrovolumenmesskammer (2) eingeordnet. Die Oberfläche des Ultraschall-Sensors (1) hat teilweise direkten Kontakt zum Medium Kraftstoff und seine Oberfläche ist inert gegen dieses Medium.To monitor the presence of fuel, a micro volume measuring chamber ( 2 ) classified. The surface of the ultrasonic sensor ( 1 ) is partly in direct contact with fuel and its surface is inert to this medium.

Die Innengeometrie der Messkammer (2) bildet einen akustischen Reflektor für die Ultraschallechos. Bezogen auf den Durchmesser der Versorgungsleitung wurde zur Auswertung dieser Echos ein Zeitfenster eingestellt. Im Iaufenden Überwachungsbetrieb erwies sich die erfindungsgemäße Ultraschalleinrichtung als zuverlässiger Anwesenheitsindikator für die Anwesenheit von Kraftstoff in der genannten Rohrleitung.The internal geometry of the measuring chamber ( 2 ) forms an acoustic reflector for the ultrasonic echoes. Based on the diameter of the supply line, a time window was set to evaluate these echoes. In ongoing monitoring operation, the ultrasound device according to the invention proved to be a reliable presence indicator for the presence of fuel in the pipeline mentioned.

Claims (3)

Ultraschalleinrichtung zur Überwachung flüssiger Medien in geringvolumigen Leitungen, mit einer Mikrovolumenmesskammer (2), welche in einer geringvolumigen Leitung eingeordnet ist und ein Ultraschall-Sensorsystem (1) aufweist, wobei die Anregungsdauer des Ultraschall-Sensorsystems zur Aussendung einzelner Impulse 0,1 bis 0,3 der Laufzeit der von der Kammerinnengeometrie reflektierten Ultraschallechos beträgtUltrasonic device for monitoring liquid media in low-volume lines, with a micro-volume measuring chamber ( 2 ), which is arranged in a low-volume line and an ultrasonic sensor system ( 1 ), the excitation period of the ultrasound sensor system for sending out individual pulses being 0.1 to 0.3 of the transit time of the ultrasound echoes reflected by the chamber interior geometry Ultraschalleinrichtung gem. Patentanspruch 1, dadurch gekennzeichnet, dass die Oberfläche des Ultraschall-Sensorsystems (1) inert gegenüber den Medien in den Leitungen ist.Ultrasonic device acc. Claim 1, characterized in that the surface of the ultrasonic sensor system ( 1 ) is inert to the media in the lines. Ultraschalleinrichtung gem. Patentanspruch 1, dadurch gekennzeichnet, dass das Ultraschall-Sensorsystem (1) teilweise direkten Kontakt zu den Medien in den Leitungen hat.Ultrasonic device acc. Claim 1, characterized in that the ultrasonic sensor system ( 1 ) has some direct contact with the media in the lines.
DE2002109255 2002-02-27 2002-02-27 ultrasonic device Expired - Fee Related DE10209255B4 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021200496A1 (en) 2021-01-20 2022-07-21 Raumedic Ag Medical flow sensor module assembly
WO2023072761A1 (en) 2021-10-29 2023-05-04 Raumedic Ag Sensor assembly for an organ transport system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807222A (en) * 1971-10-22 1974-04-30 Max Planck Gesellschaft Ultrasonic method of determining chemical relaxation characteristic of solutions and measuring cell therefor
DE4416892A1 (en) * 1994-05-13 1995-11-23 Conducta Endress & Hauser Sensor for measuring the conductivity of liquid media
DE19601656A1 (en) * 1996-01-18 1997-07-24 Teves Gmbh Alfred Damped ultrasonic transducer
DE4336520C2 (en) * 1993-10-26 1998-07-23 Siemens Ag Optical sensor and its use
DE19747273A1 (en) * 1997-10-25 1999-04-29 Conducta Endress & Hauser Monitoring seal of temperature sensor of conductivity meter for liquids
DE19833766A1 (en) * 1998-07-17 2000-01-20 Ism Ingenieurbuero Fuer Spezia Optical fluid level sensor for fluid in container

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807222A (en) * 1971-10-22 1974-04-30 Max Planck Gesellschaft Ultrasonic method of determining chemical relaxation characteristic of solutions and measuring cell therefor
DE4336520C2 (en) * 1993-10-26 1998-07-23 Siemens Ag Optical sensor and its use
DE4416892A1 (en) * 1994-05-13 1995-11-23 Conducta Endress & Hauser Sensor for measuring the conductivity of liquid media
DE19601656A1 (en) * 1996-01-18 1997-07-24 Teves Gmbh Alfred Damped ultrasonic transducer
DE19747273A1 (en) * 1997-10-25 1999-04-29 Conducta Endress & Hauser Monitoring seal of temperature sensor of conductivity meter for liquids
DE19833766A1 (en) * 1998-07-17 2000-01-20 Ism Ingenieurbuero Fuer Spezia Optical fluid level sensor for fluid in container

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Frieder Eggers et al.. "Ultrasonic absorption measurements with a millilitre ...", J. Phys. E.: Sci. Instrum., Vol. 14, H. 1, 1981, S. 113-116 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021200496A1 (en) 2021-01-20 2022-07-21 Raumedic Ag Medical flow sensor module assembly
WO2022157192A1 (en) 2021-01-20 2022-07-28 Raumedic Ag Medical flow sensor module assembly
WO2023072761A1 (en) 2021-10-29 2023-05-04 Raumedic Ag Sensor assembly for an organ transport system
DE102021212234A1 (en) 2021-10-29 2023-05-04 New Ventures GmbH Sensor assembly for an organ transport system

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