DE2304812A1 - LIGHT-CONTROLLED TENSIOMEE AUTOMATIC - Google Patents
LIGHT-CONTROLLED TENSIOMEE AUTOMATICInfo
- Publication number
- DE2304812A1 DE2304812A1 DE19732304812 DE2304812A DE2304812A1 DE 2304812 A1 DE2304812 A1 DE 2304812A1 DE 19732304812 DE19732304812 DE 19732304812 DE 2304812 A DE2304812 A DE 2304812A DE 2304812 A1 DE2304812 A1 DE 2304812A1
- Authority
- DE
- Germany
- Prior art keywords
- light
- controlled
- automatic
- tensiomee
- servomotors
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
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)
Description
Beschreibung: LICHTGESTEUERTE TENSIOMETERAUTOMATIK Die Erfindung betrifft die Automation des Meßvorganges bei solchen Ob.erflächenspannungsmeßgeräten, die als Meßwertaufnehmer eine Torsionsdrehwaage in Verbindung mit der Ringabreißmethode benutzen.Description: LIGHT CONTROLLED TENSIOMETER AUTOMATIC The invention relates to the automation of the measuring process in such surface tension measuring devices that a torsion balance in connection with the ring tear-off method as a measuring transducer use.
Die Kenntnis der Grenzflächen- und Oberflächenspannung von Fluiden ist nach wie vor für große Bereiche der' gesamten Industrie - insbesondere der chemischen - von Bedeutung.Knowledge of the interfacial and surface tension of fluids is still applicable to large areas of the 'entire industry - especially chemical - significant.
Zu ihrer Messung sind bis dato nach verschiedenen Meßprinzipien diverse Meßmethodem entwickelt worden, wobei sich das Meßprinzip nach Lecomte du Noüy (Ringabreißmethode) immet mehr durchsetzt (siehe auch DIN 53914).To date, various measurement principles have been used to measure them Measuring method has been developed, whereby the measuring principle according to Lecomte du Noüy (ring tear-off method) immet more interspersed (see also DIN 53914).
Nun@gibt es zar Zeit einerseits preiswerte Geräte, die rein manuell oder mindestens durch manuelle Steuerung von Stellmotoren den Ring zum Abreißen bringen (siehe Fertigungsprogramm der Firma A. Krüss, Hamburg) oder andererseits sehr kostspielige Tensiometer, die mit der Verstimmung von Schwingkreisen (Firma Messgerät.e-Werk Lauda, Lauda/Tauber) (Patentschrift 1211821 vom 10. 10. 64) operieren und hierbei aufwendige Frequenzgeneratoren und Verstärker benötigen.Well @ there are now on the one hand inexpensive devices that are purely manual or at least the ring to be torn off by manual control of servomotors bring (see production program of A. Krüss, Hamburg) or on the other hand very expensive tensiometers that deal with detuning oscillating circuits (company Messgerät.e-Werk Lauda, Lauda / Tauber) (patent specification 1211821 from 10. 10. 64) operate and require complex frequency generators and amplifiers.
Während die bisher auf dem Markt befindlichen automatischen-Geräte ausgesprochen teuer sind, setzen die manuellen Geräte für Messungen einiges Geschick und viel Zeit voraus.While the so far on the market automatic devices are downright expensive, the manual devices require some skill for measurements and way ahead.
Ziel der Erfindung ist es, die Vorteile einer Automation mit denen der Preiswürdigkeit z.u verbinden.The aim of the invention is to use the advantages of automation with those to combine the value for money.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine Torsionsdrahtdrehwaage verwendet wird, wobei der Waagebalken mit Hilfe einer Lichtschranke über Stellmotore immer im der Waagerechten. gehalten wird. Diese Lichtschranke ist folgendermaßen aufgebaut (siehe Bild 1): Mit. Hilfe einer Lichtquelle (1), Optik (2) und einer Blende (3) wird der Waagebalken (7) mit parallelem Licht derart. beleuchtet, daß sein.This object is achieved according to the invention in that a torsion wire balance is used, the balance beam with the help of a light barrier via servomotors always in the horizontal. is held. This light barrier is as follows built up (see picture 1): With. Using a light source (1), optics (2) and one Aperture (3) becomes the balance beam (7) with parallel light in this way. lit that be.
Schatten im Nullzustand die obere bzw. untere Hälfte der Referenzspalte gerade bedeckt. Direkt hinter dem Refernzspalt (4) sind die Fotowiderstände (5: Zur Steuerung des Stellmotores A, 6.: Zur Steuerung des Stellmotores B) angeordnet. ei Auswandern des Waagebalkens trifft den einen Fotowiderstand mehr Licht, den anderen entsprechend weniger.Shadows in the zero state the upper or lower half of the reference column just covered. Directly behind the reference gap (4) are the photo resistors (5: To control the Servomotor A, 6 .: To control the servomotor B) arranged. When the balance beam migrates, one more photo resistor hits Light, correspondingly less for the others.
Die hieraus resultierenden Widerstandsveränderungen der Fotowiderstände werden mit Hilfe eines einfachen Transistorverstärkers zur Steuerung der Stellmotore (10,15) herangezogen (siehe Bild 2). Die jeweiligen Spannungszustände an den Stellmotoren können dabei zur Steuerung des Meßablaufes herangezogen werden, so daß es möglich ist, mehrere Abreißvorgänge nacheinander automatisch z:ii vollziehen. Dabei kann aufgrund des Überdehnungsverhaltens der Flussigkeitslamelle nach Uberschreiten des Spannungsmaximums,der Meßvorgang noch vor dem Abriß abgebrochen werden, so daß nur kurzzeitiges Zurückfahren des Ringes zur Aufnahme eines neuem Meßwertes notwendig wird. So wird eine quasi-kontinuierliche Messung erreicht.The resulting changes in the resistance of the photoresistors are used to control the servomotors with the help of a simple transistor amplifier (10.15) are used (see Figure 2). The respective voltage states on the servomotors can be used to control the measuring process, so that it is possible is to carry out several tearing processes one after the other automatically z: ii. Here can due to the overstretching behavior of the liquid lamella after exceeding the Stress maximum, the measuring process can be canceled before the break, so that only Brief retraction of the ring is necessary to record a new measured value will. In this way, a quasi-continuous measurement is achieved.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732304812 DE2304812A1 (en) | 1973-02-01 | 1973-02-01 | LIGHT-CONTROLLED TENSIOMEE AUTOMATIC |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732304812 DE2304812A1 (en) | 1973-02-01 | 1973-02-01 | LIGHT-CONTROLLED TENSIOMEE AUTOMATIC |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2304812A1 true DE2304812A1 (en) | 1974-08-15 |
Family
ID=5870563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19732304812 Pending DE2304812A1 (en) | 1973-02-01 | 1973-02-01 | LIGHT-CONTROLLED TENSIOMEE AUTOMATIC |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2304812A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998011421A1 (en) * | 1996-09-13 | 1998-03-19 | Kibron Inc. Oy | Device for measuring the surface pressure |
RU2545333C1 (en) * | 2013-11-28 | 2015-03-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Казанский (Приволжский) Федеральный Университет" (ФГАОУ ВПО КФУ) | Method for determining coefficient of surface tension of liquids by means of spreading method |
RU2547003C1 (en) * | 2013-11-27 | 2015-04-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Казанский (Приволжский) Федеральный Университет" (ФГАОУ ВПО КФУ) | Method of determination of liquid surface tension by capillary method |
-
1973
- 1973-02-01 DE DE19732304812 patent/DE2304812A1/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998011421A1 (en) * | 1996-09-13 | 1998-03-19 | Kibron Inc. Oy | Device for measuring the surface pressure |
US6222184B1 (en) | 1996-09-13 | 2001-04-24 | Kibron Inc. Oy | Device for measuring the surface pressure |
RU2547003C1 (en) * | 2013-11-27 | 2015-04-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Казанский (Приволжский) Федеральный Университет" (ФГАОУ ВПО КФУ) | Method of determination of liquid surface tension by capillary method |
RU2545333C1 (en) * | 2013-11-28 | 2015-03-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Казанский (Приволжский) Федеральный Университет" (ФГАОУ ВПО КФУ) | Method for determining coefficient of surface tension of liquids by means of spreading method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2304812A1 (en) | LIGHT-CONTROLLED TENSIOMEE AUTOMATIC | |
DE535023C (en) | Device for testing yarn or the like for elastic and permanent elongation under any load and for tensile strength | |
DE3410845C2 (en) | Device for the continuous weighing of flowable material | |
DE435547C (en) | Device for measuring small pressures or small pressure differences | |
DE2313910C2 (en) | Method for determining the oil content of water containing small amounts of oil and apparatus for carrying out the same | |
DE1099183B (en) | Length measuring device for roller lines | |
DE564469C (en) | Machine for determining the coefficient of friction of oil and the frictional wear of fabrics | |
DE155909C (en) | ||
DE2260088C3 (en) | Process for continuous phase exchange and measurement of the solution concentration of gases dissolved in flowing liquids and arrangement for carrying out the process | |
DE579549C (en) | Electric remote water level indicator | |
DE818872C (en) | Method and apparatus for measuring pressures | |
DE257650C (en) | ||
DE624149C (en) | Rotating measuring device that triggers a signal or switching process when a certain power limit is exceeded and allows the instantaneous value of the power to be read | |
DE586385C (en) | Device for recording and checking manometer pressure values | |
DE3337149A1 (en) | Gauge appliance for control engineering | |
DE540878C (en) | Device for automatic control of the consistency of liquids of all kinds | |
AT315541B (en) | Measuring arrangement for the rapid determination of the oil content and the degree of contamination of emulsions, in particular of roller emulsions | |
DE646428C (en) | Self-recording mechanical tension meter for textile threads | |
DE491907C (en) | Device for the transmission and translation of movements in display devices | |
DE667484C (en) | Device for measuring the differential pressure, especially for airspeed indicators | |
DE904957C (en) | Device for measuring the degree of filling of fishing nets | |
AT129699B (en) | Device for recording a measurement curve by recording consecutive ordinates. | |
DE491635C (en) | Pendulum-like device for displaying inclinations, especially longitudinal inclinations of aircraft | |
DE387475C (en) | Calculating apparatus | |
DE527119C (en) | Under and overweight scales |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OHA | Expiration of time for request for examination |