WO2017005243A1 - Procédé et dispositif pour déterminer la densité de liquides - Google Patents

Procédé et dispositif pour déterminer la densité de liquides Download PDF

Info

Publication number
WO2017005243A1
WO2017005243A1 PCT/DE2016/100290 DE2016100290W WO2017005243A1 WO 2017005243 A1 WO2017005243 A1 WO 2017005243A1 DE 2016100290 W DE2016100290 W DE 2016100290W WO 2017005243 A1 WO2017005243 A1 WO 2017005243A1
Authority
WO
WIPO (PCT)
Prior art keywords
deflection
mirror
glass
examined
liquid
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/DE2016/100290
Other languages
German (de)
English (en)
Inventor
Sükrü YILMAZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schmidt and Haensch GmbH and Co
Original Assignee
Schmidt and Haensch GmbH and Co
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 Schmidt and Haensch GmbH and Co filed Critical Schmidt and Haensch GmbH and Co
Priority to EP16751159.1A priority Critical patent/EP3317639A1/fr
Publication of WO2017005243A1 publication Critical patent/WO2017005243A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/24—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing the transmission of wave or particle radiation through the material

Definitions

  • the invention relates to a method for determining the density of liquids and to an apparatus for carrying out the method.
  • the oscillation period can be determined very accurately, whereby the vibration is caused by a piezo element or electromagnetic coils.
  • this method of measurement allows a density determination of 1 * 10 5 g / cm A 3. Also measurements in the
  • optically recorded and filled with glass liquids is correlated to the density.
  • a thin gap 4 along the entire length is formed by two similar and equal length glass tube 1 un 2, which are adjusted closely and parallel to each other, which changes slightly when filling a glass tube 1. Since the whole thing is in the
  • the transparent glass tubes are rendered opaque by a suitable method, after imaging through a lens on a one- or two-dimensional image recorder, e.g. a CCD camera 6, a diffraction image 5, the shape of which can be replicated very accurately theoretically.
  • a suitable method after imaging through a lens on a one- or two-dimensional image recorder, e.g. a CCD camera 6, a diffraction image 5, the shape of which can be replicated very accurately theoretically.
  • the diffraction stripes correspondingly move symmetrically away from the center.
  • the system remains independent of mechanical drift, since according to the invention, only the distance is measured symmetrically to the center strip. It is also possible to simulate the entire image with a theoretical adaptation and to determine the gap thickness from this.
  • the method thus offers the possibility to measure very quickly and continuously a measurement of the density of liquids.
  • the sensitivity of the method depends mainly on the original size of the gap and on the length of the glass tube.
  • the maximum deflection increases with the fourth power of length.
  • this solution offers a lower resolution than the second variant explained below, it has the advantage of a very simple construction.
  • the "interferometers” are known to be the most sensitive measuring methods for determining position.
  • One of the most sensitive processes is the so-called
  • Fabry-Perot interferometry by means of two highly reflective, parallel mirrors, a transmitted laser beam is reflected back and forth so frequently that so-called multi-beam interferences appear. These differ from the 2-beam interferences in that the resulting amplitude modulation of the light beam applied to the display no longer results in a sine-like modulation, but in a
  • V2d thus represents the so-called spectral width
  • a very close-spaced Fabry-Perot interferometer is thus a moderately resolving spectrometer, but the purpose of a balance is nevertheless very high
  • this can be done with an arrangement in which a U-tube 7 is clamped on one side as the glass measuring tube, wherein one mirror 10 is to be fastened to the U-tube, while the other mirror 11 fixed to the apparatus or at the anchor the U_Rohres is attached.
  • the moving mirror mounted long-term stable at the top of the U-tube and perpendicularly illuminated with a matching laser beam 8, and the lens 9, then the resulting interferogram 13, consisting of very sharp light lines on dark Underground, move perpendicular to its line direction.
  • this movement of the strip can be achieved by, for example, filling the empty U-tube with a liquid.
  • the relative movement here is only in the ⁇ range. Since these interference fringes are physically located between the two mirrors, they can be sharply imaged with a small converging lens 12 onto a CCD line camera 6 (see Figure 3).
  • a modified measuring arrangement ( Figure 4) is characterized in that instead of a U-shaped Glasmessrschreibchens two parallel, clamped on both sides, glass measuring tubes 14,15 are used.
  • the mirror arrangement is located halfway along the length of the tubes, ie in the region of the greatest deflection of the one, with the test liquid fillable glass measuring tube.
  • the presented method is a bending beam whose deflection is determined with high precision by means of interferometric measuring technology, or according to another embodiment represents a bending beam clamped on both sides.
  • the system In contrast to the vibration tube system, the system needs no external excitation, which must be coupled in a complicated manner to the system. -
  • the forced vibrations with z.T. high amplitude lead to aging of the glass structure and drift of the measured values.
  • the presented method works in the fully elastic range with about 50x less peak amplitude and does not represent a practical load of the system.
  • the measuring time can move under optimal circumstances in the range of a few seconds, since no feedback, no excitation, no amplitude modulation and no control loop is necessary for the measurement.

Landscapes

  • 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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un procédé pour déterminer la densité de liquides. La déviation ou la flexion verticale d'un tube de mesure en verre (1, 2, 7, 14, 15, 16, 17) rempli du liquide à analyser est détectée et mise en corrélation avec la densité.
PCT/DE2016/100290 2015-07-03 2016-06-27 Procédé et dispositif pour déterminer la densité de liquides Ceased WO2017005243A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16751159.1A EP3317639A1 (fr) 2015-07-03 2016-06-27 Procédé et dispositif pour déterminer la densité de liquides

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015110741.4 2015-07-03
DE102015110741.4A DE102015110741A1 (de) 2015-07-03 2015-07-03 Verfahren und Vorrichtung zur Bestimmung der Dichte von Flüssigkeiten

Publications (1)

Publication Number Publication Date
WO2017005243A1 true WO2017005243A1 (fr) 2017-01-12

Family

ID=56684403

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2016/100290 Ceased WO2017005243A1 (fr) 2015-07-03 2016-06-27 Procédé et dispositif pour déterminer la densité de liquides

Country Status (3)

Country Link
EP (1) EP3317639A1 (fr)
DE (1) DE102015110741A1 (fr)
WO (1) WO2017005243A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110044829A (zh) * 2019-05-08 2019-07-23 上海仪电物理光学仪器有限公司 食品质量分析仪及其使用方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177705A (en) * 1961-06-01 1965-04-13 Automation Prod Apparatus for determining viscosity of materials
US5339258A (en) * 1990-11-22 1994-08-16 Hans Stabinger Apparatus for determining the density of liquids and gases from a period of an oscillator filled with a test sample
US6722209B1 (en) * 2002-11-27 2004-04-20 Industrial Technology Research Institute Coriolis force type flow meter using optical interferometer
WO2006104485A1 (fr) * 2005-03-29 2006-10-05 Micro Motion, Inc. Debitmetre de coriolis et procede permettant de determiner des caracteristiques d'ecoulement
AT508675A4 (de) * 2009-02-24 2011-03-15 Messtechnik Dr Hans Stabinger Gmbh Lab F Viskositätsmessgerät
AT514574A4 (de) * 2013-10-17 2015-02-15 F Messtechnik Dr Hans Stabinger Gmbh Lab Dichtemessvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177705A (en) * 1961-06-01 1965-04-13 Automation Prod Apparatus for determining viscosity of materials
US5339258A (en) * 1990-11-22 1994-08-16 Hans Stabinger Apparatus for determining the density of liquids and gases from a period of an oscillator filled with a test sample
US6722209B1 (en) * 2002-11-27 2004-04-20 Industrial Technology Research Institute Coriolis force type flow meter using optical interferometer
WO2006104485A1 (fr) * 2005-03-29 2006-10-05 Micro Motion, Inc. Debitmetre de coriolis et procede permettant de determiner des caracteristiques d'ecoulement
AT508675A4 (de) * 2009-02-24 2011-03-15 Messtechnik Dr Hans Stabinger Gmbh Lab F Viskositätsmessgerät
AT514574A4 (de) * 2013-10-17 2015-02-15 F Messtechnik Dr Hans Stabinger Gmbh Lab Dichtemessvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110044829A (zh) * 2019-05-08 2019-07-23 上海仪电物理光学仪器有限公司 食品质量分析仪及其使用方法

Also Published As

Publication number Publication date
EP3317639A1 (fr) 2018-05-09
DE102015110741A1 (de) 2017-01-05

Similar Documents

Publication Publication Date Title
DE69606450T2 (de) Wellenfrontenbestimmung mit Mikrospiegel zur Selbstreferenz und seine Justage
EP2863167B1 (fr) Procédé et dispositif de mesure de la déviation de rayons lumineux à travers la structure d'un objet ou d'un support
EP1636542B1 (fr) Procede et dispositif de mesure pour la mesure sans contact d'angle et de modifications angulaires sur des objets
DE102008023599A1 (de) Verfahren und Vorrichtung zur mikroskopischen Erfassung örtlicher Neigungen und der dreidimensionalen Form eines Objekts
DE2100507A1 (de) Optisches Meßverfahren
DE102014111979A1 (de) Interferometer
DE102016010236A1 (de) Lidar-system mit beweglicher faser
EP1636544B1 (fr) Inclinometre optique
WO2003060422A2 (fr) Systeme optique interferometrique
DE102014108136A1 (de) Laser Triangulationssensor und Messverfahren mit Laser Triangulationssensor
DE60211021T2 (de) Vorrichtung und prozess zur probencharakterisierung
EP3317639A1 (fr) Procédé et dispositif pour déterminer la densité de liquides
DE3789901T2 (de) Entfernungsmessung mit hilfe von diffraktion.
DE69126918T2 (de) Messverfahren des Einfallwinkels eines Lichtstrahls, Vorrichtung zur Durchführung des Verfahrens sowie deren Verwendung zur Entfernungsmessung
DE2628836C3 (de) Optischer Phasendiskriminator
DE102016010448A1 (de) Faser-basierter Laser-Scanner
DE102014011668A1 (de) Stabiles Interferometer mit hoher Étendue, insbesondere für bildgebende Fourier-Transformations-Spektroskopie ohne Objektabrasterung
Tepichin-Rodriguez et al. Talbot effect based tunable setup for the measurement of stepped surfaces: Plane and spherical wavefront illumination
DE102021125813B4 (de) Doppelspiegel-Shear-Interferometer und Verfahren zum zerstörungsfreien Messen einer Oberfläche mittels interferometrischer Messverfahren
DE102013209461B3 (de) Verfahren und Vorrichtung zur Vermessung eines optischen Wellenfelds
DE19738900B4 (de) Interferometrische Meßvorrichtung zur Formvermessung an rauhen Oberflächen
DE102006031822B3 (de) Verfahren zur Abtastung optischer Interferenzmuster mit Zeilensensoren
EP3987327B1 (fr) Système optique pourvu d'un élément de filtrage
DE2928921A1 (de) Apparatur zur bestimmung der empfindlichkeit von optischen systemen
DE102017001524B4 (de) Anordnung zur Vermessung zumindest teilweise reflektierender Oberflächen

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16751159

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2016751159

Country of ref document: EP