DE4340026A1 - Mixture ratio measuring device - Google Patents

Mixture ratio measuring device

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Publication number
DE4340026A1
DE4340026A1 DE19934340026 DE4340026A DE4340026A1 DE 4340026 A1 DE4340026 A1 DE 4340026A1 DE 19934340026 DE19934340026 DE 19934340026 DE 4340026 A DE4340026 A DE 4340026A DE 4340026 A1 DE4340026 A1 DE 4340026A1
Authority
DE
Germany
Prior art keywords
alcohol
sensor
measured
thermostat
temperature
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.)
Withdrawn
Application number
DE19934340026
Other languages
German (de)
Inventor
Wilfried Braeutigam
Thomas Prinz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19934340026 priority Critical patent/DE4340026A1/en
Publication of DE4340026A1 publication Critical patent/DE4340026A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1826—Organic contamination in water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0054—Devices for controlling dampening
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure or temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/0047—Organic compounds

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Combustion & Propulsion (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Rotary Presses (AREA)

Abstract

A measuring device is described for determining and maintaining constant the mixing ratio of a liq. mixt. esp. for determining and maintaining constant the alcohol concn. and for control, prepn. and maintenance of the wetting liq. required in offset printing processes.

Description

Die Erfindung betrifft ein Meßverfahren zur Bestimmung des Alkoholgehaltes in Vol.% in einem in fließender Bewegung befindlichen Wassergemisch.The invention relates to a measuring method for determining the alcohol content in Vol.% In a water mixture in flowing motion.

Bei bestimmten Produktionsabläufen wird ein Wassergemisch in Abhängigkeit von Temperatur, Härtegrad und anderen Parametern wie z. B. Alkohol benötigt. So beim Offsetdruckverfahren. Da immer bessere Druckergebnisse gefordert werden, werden auch immer höhe­ re Anforderungen an Maschine und Aggregate gestellt.In certain production processes, a water mixture becomes dependent of temperature, degree of hardness and other parameters such as B. alcohol required. So with the offset printing process. As better and better printing results are required, they are getting higher re demands on machine and aggregates.

Zwangsläufig muß daher auch das Meßverfahren zur Bestimmung des Alkohol­ gehaltes im Mischwasser verbessert werden. Die bisher angewandten Meßver­ fahren, wie mittels Spindel, Lufteinblasen innerhalb einer Meßstrecke oder das Aufheizen des Wassergemisches sind nicht mehr ausreichend. Es wurde daher ein neues Verfahren entwickelt, welches alle bisher bekannten Nachteile ver­ meidet.Inevitably, therefore, the measuring method for determining alcohol content in the mixed water can be improved. The previously used measuring ver drive, such as by means of a spindle, air blowing within a measuring section or that Heating up the water mixture is no longer sufficient. It was therefore developed a new method, which ver all known disadvantages avoids.

Es wird davon ausgegangen, in einer quasi abgeschlossenen Meßkammer durch­ strömt das Mischwasser, unter Einhaltung eines festgelegten Niveaus, die Meß­ strecke. Über dem Mischwasserspiegel entsteht ein Alkoholdunst, der dem Alkoholgehalt im Mischwasser entspricht.It is assumed to be in a quasi-closed measuring chamber the mixed water flows, observing a defined level, the measuring route. There is an alcohol vapor above the mixed water level, which Alcohol content in the mixed water corresponds.

Führt man diese Luft mittels Vacuumpumpe, Lüfter oder ähnlichem einem Alko­ holsensor zu,so könnte man das Ergebnis in Vol.% eichen. Diese Anordnung beinhaltet jedoch Meßfehler.If this air is led by means of a vacuum pump, fan or similar to an Alko fetch sensor, you could calibrate the result in vol.%. This arrangement however contains measurement errors.

Deshalb wurde eine Sensorik entwickelt, die diese Fehler ausschließt.Therefore, a sensor system was developed that excludes these errors.

Das Meßsystem besteht aus einem Gehäuse A. Dieses Gehäuse wird durch eine Trennwand C in zwei Räume aufgeteilt. Die Trennwand C hat eine Öffnung, die die Sensorik D aufnimmt.The measuring system consists of a housing A. This housing is replaced by a Partition C divided into two rooms. The partition wall C has an opening that the sensors D records.

Die Sensorik besteht aus einem Thermostat mit einer bestimmten Masse, den Sensoren und der Elektronik einschließlich eines Mikrocontrollers.The sensor system consists of a thermostat with a certain mass, the Sensors and electronics including a microcontroller.

Die durch das Thermostat erzeugte Warmluft wird über die Entlüftung B abgeführt. Die dadurch entstehende Thermik saugt den Alkoholdunst aus dem Meßraum 2 in den Raum 1 des Gehäuses und durchläuft dabei den Alkoholsensor.The warm air generated by the thermostat is discharged via vent B. The resulting thermals sucks the alcohol vapor from the measuring room 2 into room 1 of the housing and passes through the alcohol sensor.

Durch die Thermik entsteht im Meßraum 2 ein leichter Unterdruck, der die Ver­ dunstung des Alkohols begünstigt.The thermal creates a slight negative pressure in measuring room 2 , which favors the evaporation of the alcohol.

Schema A: Hier wird der untere Abschluß der Meßkammer durch den Wasser­ stand der Vorrats-, Misch- und Kühlwanne gebildet.Scheme A: Here is the lower end of the measuring chamber through the water the storage, mixing and cooling trough was formed.

Schema B zeigt die Meßeinrichtung als autarkes System und unterscheidet sich nur im Abschluß des Meßraumes und in der Mischwasserführung.Scheme B shows the measuring device as an autonomous system and differs only at the end of the measuring room and in the mixed water supply.

Claims (20)

1. Meßeinrichtung zur Bestimmung und Konstanthaltung des Mischungsverhältnisses einer Flüssigkeitsmischung, insbesondere zur Bestimmung und Konstanthaltung der Alkoholkonzentration sowie zur Steuerung, Aufbereitung und Erhaltung der beim Off­ setdruckverfahren benötigten Feuchtflüssigkeit.1. Measuring device for determining and keeping the mixing ratio constant a liquid mixture, in particular for determining and keeping the Alcohol concentration as well as for the control, preparation and maintenance of the off dampening solution required. 2. Dadurch gekennzeichnet, daß das Meßverfahren aus einem Gehäuse besteht, welches in zwei Räume geteilt ist.2. characterized in that the measuring method consists of a housing, which is divided into two rooms. 3. Dadurch gekennzeichnet, daß die Trennung der zwei Räume durch eine Trennwand erfolgt die eine Bohrung besitzt.3. Characterized in that the separation of the two rooms by a partition which has a hole. 4. Dadurch gekennzeichnet, daß die Bohrung in der Trennwand eine Sensorik aufnimmt.4. characterized in that the hole in the partition is a sensor system records. 5. Dadurch gekennzeichnet, daß der Alkoholsensor in der Sensorik so eingelagert ist, daß der Alkoholdunst nur durch diesen Sensor in den Raum 1 gelangen kann.5. characterized in that the alcohol sensor is stored in the sensor system so that the alcohol vapor can only get into room 1 through this sensor. 6. Dadurch gekennzeichnet, daß die gesamte Elektronik durch ein Thermostat auf einer konstanten Temperatur gehalten wird.6. Characterized in that the entire electronics by a thermostat on one constant temperature is maintained. 7. Dadurch gekennzeichnet, daß das Meßverfahren einen Verdunstungsraum 2 besitzt, in welchen die Feuchtflüssigkeit eingeleitet wird.7. characterized in that the measuring method has an evaporation chamber 2 , in which the dampening liquid is introduced. 8. Dadurch gekennzeichnet, daß der gemessene Alkoholgehalt über den Sensor zur Entlüftung B abgeführt wird.8. Characterized in that the measured alcohol content via the sensor for Vent B is discharged. 9. Dadurch gekennzeichnet, daß die Sensorik aus einem Thermostat besteht, welches folgende Teile zur Stabilisierung des Meßergebnisses beinhaltet:
  • a. Sensor zur Messung des Alkoholgehaltes in Vol.%.
  • b. Elektronik für das Thermostat und für die Sensoren.
  • c. Mikrocontroller für die Auswertung und Steuerung.
  • d. Schnittstelle für 1. Anzeige des Alkoholgehaltes oder 2. Meßwerterfassung.
9. Characterized in that the sensor system consists of a thermostat which contains the following parts to stabilize the measurement result:
  • a. Sensor for measuring the alcohol content in vol.%.
  • b. Electronics for the thermostat and for the sensors.
  • c. Microcontroller for evaluation and control.
  • d. Interface for 1st display of alcohol content or 2nd measurement value acquisition.
10. Dadurch gekennzeichnet, daß das zu messende Wassergemisch kontinuierlich dem Verdunstungsraum zugeführt wird.10. Characterized in that the water mixture to be measured continuously Evaporation chamber is supplied. 11. Dadurch gekennzeichnet, daß die Temperatur des Wassergemisches im Verdun­ stungsraum ständig mittels Temperaturfühler M gemessen wird.11. Characterized in that the temperature of the water mixture in the Verdun room is constantly measured using a temperature sensor M. 12. Dadurch gekennzeichnet, daß die gemessene Temperatur dem Mikrocontroller zur Auswertung zugeführt wird.12. Characterized in that the measured temperature for the microcontroller Evaluation is fed. 13. Dadurch gekennzeichnet, daß die Wärme die durch das Thermostat entsteht eine Thermik entstehen läßt. Diese Thermik wird genützt um den Alkoholdunst über den Alkoholsensor zu führen.13. Characterized in that the heat generated by the thermostat Creates thermals. This thermal is used to keep the alcohol vapor above the Alcohol sensor. 14. Dadurch gekennzeichnet, daß der Alkoholdunst gegebenenfalls mittels entspre­ chender Saugvorrichtung über den Alkoholsensor geführt werden kann.14. Characterized in that the alcohol vapor may correspond by means of The suction device can be guided over the alcohol sensor. 15. Dadurch gekennzeichnet, daß der Alkoholgehalt des Mischwassers in Vol.% ange­ zeigt und zur Steuerung verwendet werden kann.15. Characterized in that the alcohol content of the mixed water in% by volume shows and can be used for control. 16. Dadurch gekennzeichnet, daß der fehlende Alkohol über die Zuführung F dem Mischwasser zugeführt wird.16. Characterized in that the lack of alcohol via the feed F to the Mixed water is supplied. 17. Dadurch gekennzeichnet, daß zur weiteren Steigerung der Meßgenauigkeit die ein­ laufende Mischwassertemperatur gemessen wird und in die Auswertung des Alkohol­ gehaltes einfließt. 17. Characterized in that to further increase the accuracy of measurement running mixed water temperature is measured and in the evaluation of alcohol flows in.   18. Dadurch gekennzeichnet, daß in Schema B der Mischwasserstand im Raum 2 mit­ tels Sensor konstant gehalten wird.18. Characterized in that in scheme B the mixed water level in room 2 is kept constant by means of a sensor. 19. Dadurch gekennzeichnet, daß alle den Meßwert beeinflussenden Parameter stabi­ lisiert bzw. gemessen und berücksichtigt werden.19. Characterized in that all parameters influencing the measured value are stable be measured or measured and taken into account. 20. Dadurch gekennzeichnet, daß der Auslauf L über ein Syphon geführt wird, damit ein geschlossener Raum 2 entsteht.20. Characterized in that the outlet L is passed over a siphon, so that a closed room 2 is formed.
DE19934340026 1993-11-24 1993-11-24 Mixture ratio measuring device Withdrawn DE4340026A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19934340026 DE4340026A1 (en) 1993-11-24 1993-11-24 Mixture ratio measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934340026 DE4340026A1 (en) 1993-11-24 1993-11-24 Mixture ratio measuring device

Publications (1)

Publication Number Publication Date
DE4340026A1 true DE4340026A1 (en) 1995-06-01

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Application Number Title Priority Date Filing Date
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DE (1) DE4340026A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10136130A1 (en) * 2001-07-27 2003-02-20 Technotrans Ag Process to calibrate alcoholic content sensor in ambient air for offset printing wetting process
DE19739371C2 (en) * 1997-03-29 2003-02-20 Technotrans Ag Device for measuring and adjusting the alcohol content in the dampening solution for offset printing
DE19607681B4 (en) * 1996-02-29 2009-07-09 Fogra Forschungsgesellschaft Druck E.V. Method and device for continuous measurement and control of the composition of a dampening solution for offset printing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607681B4 (en) * 1996-02-29 2009-07-09 Fogra Forschungsgesellschaft Druck E.V. Method and device for continuous measurement and control of the composition of a dampening solution for offset printing
DE19739371C2 (en) * 1997-03-29 2003-02-20 Technotrans Ag Device for measuring and adjusting the alcohol content in the dampening solution for offset printing
DE10136130A1 (en) * 2001-07-27 2003-02-20 Technotrans Ag Process to calibrate alcoholic content sensor in ambient air for offset printing wetting process
DE10136130B4 (en) * 2001-07-27 2004-09-16 Technotrans Ag Process for measuring the alcohol content in dampening solution for offset printing

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