DE1252430B - - Google Patents
Info
- Publication number
- DE1252430B DE1252430B DEC35848A DE1252430DA DE1252430B DE 1252430 B DE1252430 B DE 1252430B DE C35848 A DEC35848 A DE C35848A DE 1252430D A DE1252430D A DE 1252430DA DE 1252430 B DE1252430 B DE 1252430B
- Authority
- DE
- Germany
- Prior art keywords
- amplifier
- liquid level
- level
- relay
- 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.)
- Pending
Links
- 239000007788 liquid Substances 0.000 claims description 24
- 238000005406 washing Methods 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000001808 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000001105 regulatory Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
-
- 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
- G01F23/26—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/266—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Automation & Control Theory (AREA)
- Control Of Washing Machine And Dryer (AREA)
Description
DEUTSCHES MIM PATENTAMTGERMAN MIM PATENT OFFICE
AUSLEGESCHRIFTEDITORIAL
Deutsche Kl.: 42 e - 34 German classes: 42 e - 34
Nummer: 1252430Number: 1252430
Aktenzeichen: C 35848 LX b/42 eFile number: C 35848 LX b / 42 e
1 252430 Anmeldetag: 14. Mai 19651 252430 Filing date: May 14, 1965
Auslegetag: 19. Oktober 1967Opened on: October 19, 1967
Die Erfindung bezieht sich auf einen elektronischen Flüssigkeitsniveauregler mit einem, aus zwei elektrisch gegeneinander isolierten Elektroden bestehenden, in die Flüssigkeit eintauchenden Niveaufühler, dessen in Abhängigkeit vom Flüssigkeitsniveau sich ändernder Kapazitätswert die Regelgröße bestimmt, sowie einem Oszillator und einem Verstärker, der auf ein den Flüssigkeitszulauf steuerndes Element wirkt.The invention relates to an electronic liquid level controller with one or two level sensors that are electrically insulated from each other and are immersed in the liquid, whose capacity value, which changes depending on the liquid level, determines the controlled variable, as well as an oscillator and an amplifier which act on an element controlling the liquid inflow works.
Es ist bereits eine Vorrichtung zum Regulieren eines Flüssigkeitsstandes bekanntgeworden, bei der dem Schwingkreis eines eine Verstärkerröhre speisenden Oszillators ein kapazitiver Fühler parallel geschaltet ist, wobei die Verstärkerröhre über ein Relais ein Ventil oder einen Pumpenmotor steuert.There is already a device for regulating a liquid level has become known in which A capacitive sensor is connected in parallel to the resonant circuit of an oscillator feeding an amplifier tube is, wherein the amplifier tube controls a valve or a pump motor via a relay.
Dieser bekannte Regler hat den Nachteil, daß, insbesondere bei zeitlich langsam verlaufenden kleinen Niveauänderungen, kein sicheres Ansprechen der an den Regler angeschlossenen Steuerelemente gewährleistet ist. Außerdem erfordert sein Aufbau einen verhältnismäßig großen Aufwand an frequenzbestimmenden Elementen, die häufig nachjustiert werden müssen.This known regulator has the disadvantage that, especially in the case of small ones that run slowly over time Level changes, no reliable response of the control elements connected to the controller guaranteed is. In addition, its structure requires a relatively large amount of frequency-determining Elements that have to be readjusted frequently.
Erfindungsgemäß wird dieser Nachteil dadurch beseitigt, daß der Niveaufühler das Kupplungsglied zwischen dem Oszillator und einem transistorisierten Schwellwertverstärker bildet.According to the invention, this disadvantage is eliminated in that the level sensor is the coupling member forms between the oscillator and a transistorized threshold amplifier.
Durch diese Maßnahme wird ein eindeutiges Schaltkriterium durch den bei einem bestimmten Kapazitätswert des Niveaufühlers kippenden Verstärker erreicht. Der erfindungsgemäße Regler zeigt eine geringe Störungsanfälligkeit und braucht nicht nachjustiert zu werden.Through this measure, a clear switching criterion is established by the with a certain Capacitance value of the level sensor tilting amplifier reached. The controller according to the invention shows a low susceptibility to failure and does not need to be readjusted.
Der Niveaufühler bildet vorteilhaft mit dem Basiskondensator des Eingangstransistors des Verstärkers einen Spannungsteiler.The level sensor forms advantageously with the base capacitor of the input transistor of the amplifier a voltage divider.
An den Ausgang des Verstärkers kann die Erregerspule eines Magnetventils, ein in Abhängigkeit von der Regelabweichung betätigtes Relais oder eine Pumpe angeschlossen werden. Soll der Regler zur Überwachung eines Flüssigkeitsstandes mit periodisch bewegter Oberfläche eingesetzt werden, ist es vorteilhaft, in den Erregerkreis des Magnetventils, bzw. in den Arbeitsstromkreis des Relais, oder in den Versorgungsstromkreis des Reglers einen Abfragekontakt einzuschalten, der in den Ruheperioden der Flüssigkeitsoberfläche, z. B. in Abhängigkeit von einem Programm, betätigt wird. Bei der Anwendung des erfindungsgemäßen Niveaureglers zur Überwachung des Flüssigkeitsstandes in Trommelwaschmaschinen wird zweckmäßig der Abfragekontakt in den Reversierpausen der Waschtrommel, d. h. bei Elektronischer FlüssigkeitsniveaureglerThe excitation coil of a solenoid valve can be connected to the output of the amplifier as a function of the control deviation actuated relay or a pump can be connected. If the controller is to Monitoring of a liquid level with periodically moving surface is used advantageous in the excitation circuit of the solenoid valve, or in the working circuit of the relay, or in the To switch on the supply circuit of the controller a query contact, which is in the idle periods of the Liquid surface, e.g. B. is operated in dependence on a program. In the application of the level controller according to the invention for monitoring the liquid level in drum washing machines the interrogation contact is expediently in the reversing pauses of the washing drum, d. H. at Electronic liquid level regulator
Anmelder:Applicant:
Constructa-Werke G. m. b. H.,
München, Oskar-von-Miller-Ring 18Constructa-Werke G. mb H.,
Munich, Oskar-von-Miller-Ring 18
Als Erfinder benannt:
Dipl.-Ing. Artur Hamacher,
Bochum-LangendreerNamed as inventor:
Dipl.-Ing. Artur Hamacher,
Bochum-Langendreer
beruhigter Flottenoberfläche, geschlossen, da sich nur in diesem Betriebszustand das wirkliche Flüssigkeitsniveau einstellt. calmed liquor surface, closed, as the real liquid level is only established in this operating state.
Um den Niveauregler auf verschiedene Sollhöhen ao einstellen zu können, wird der Schwellwert des Verstärkers veränderbar gemacht. Dies wird dadurch erreicht, daß entweder der Ladewiderstand und/oder der Basiskondensator des Verstärkereingangstransistors, insbesondere in Abhängigkeit von einem Proas gramm, veränderbar ausgebildet werden. Dadurch wird es möglich, innerhalb eines Programms, z. B. eines Waschprogramms, verschiedene Flüssigkeitsniveaus einzustellen. In order to be able to set the level controller to different target heights ao , the threshold value of the amplifier is made changeable. This is achieved in that either the charging resistor and / or the base capacitor of the amplifier input transistor, in particular as a function of a program, are designed to be changeable. This makes it possible within a program, e.g. B. a washing program to set different liquid levels.
In der Zeichnung ist ein Ausführungsbeispiel der Schaltung eines erfindungsgemäßen Niveaureglers dargestellt.In the drawing is an embodiment of the circuit of a level controller according to the invention shown.
An den Ausgang des an sich bekannten Oszillators 1, dessen Frequenz z. B. 16 kHz betragen kann, ist eine Elektrode des kapazitativen Niveaufühlers 2 angeschlossen, während die andere Elektrode mit der Basis 3 des Eingangstransistors 4 eines ebenfalls bekannten Schwellwertverstärkers 6 verbunden ist, so daß der Niveaufühler 2 mit der Basiskapazität 5 einen kapazitativen Spannungsteiler bildet. Das Kippverhalten des Verstärkers 6 wird durch den Wert des Ladewiderstandes 7 bestimmt, der vorteilhaft veränderbar ausgebildet ist, so daß er entweder von Hand auf ein bestimmtes Sollniveau oder programmabhängig nacheinander auf verschiedene Niveauwerte eingestellt werden kann. An den Ausgang des Verstärkers 6 ist ein Relais 8 angeschlossen, in dessen Arbeitskreis ein Magnetventil 9 geschaltet ist. Ebenfalls in den Arbeitskreis des Relais 8 ist ein Abfragekontakt 10 eingefügt, der vorteilhaft in Abhängigkeit von einem Programm, bei Trommelwaschmaschinen z. B. während der Reversierpausen der Waschtrommel, geschlossen wird.At the output of the known oscillator 1, the frequency of which z. B. 16 kHz, one electrode of the capacitive level sensor 2 is connected, while the other electrode is connected to the base 3 of the input transistor 4 of an also known threshold amplifier 6 , so that the level sensor 2 with the base capacitance 5 forms a capacitive voltage divider. The tilting behavior of the amplifier 6 is determined by the value of the charging resistor 7 , which is advantageously designed to be variable, so that it can either be set manually to a certain target level or, depending on the program, one after the other to different level values. A relay 8 is connected to the output of the amplifier 6 and a solenoid valve 9 is connected in its working circuit. Also in the working group of the relay 8 , a query contact 10 is inserted, which is advantageous depending on a program, for drum washing machines. B. is closed during the reversing pauses of the washing drum.
709 678/188709 678/188
Claims (8)
Publications (1)
Publication Number | Publication Date |
---|---|
DE1252430B true DE1252430B (en) | 1967-10-19 |
Family
ID=605395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC35848A Pending DE1252430B (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1252430B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3128887A1 (en) * | 1981-07-22 | 1983-02-17 | Baldwin-Gegenheimer GmbH, 8900 Augsburg | Device for the supplying of a consumer with a medium which can be transported in a supply line |
DE3149830A1 (en) * | 1981-12-16 | 1983-07-07 | Koch, Berthold, 5963 Wenden | DEVICE FOR DERIVING CONDENSATE AND THE LIKE FROM PRINTING SYSTEMS |
-
0
- DE DEC35848A patent/DE1252430B/de active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3128887A1 (en) * | 1981-07-22 | 1983-02-17 | Baldwin-Gegenheimer GmbH, 8900 Augsburg | Device for the supplying of a consumer with a medium which can be transported in a supply line |
DE3149830A1 (en) * | 1981-12-16 | 1983-07-07 | Koch, Berthold, 5963 Wenden | DEVICE FOR DERIVING CONDENSATE AND THE LIKE FROM PRINTING SYSTEMS |
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