DE19946180B4 - Circuit for measuring the moisture content of liquid petroleum products by examining the capacity - Google Patents
Circuit for measuring the moisture content of liquid petroleum products by examining the capacity Download PDFInfo
- Publication number
- DE19946180B4 DE19946180B4 DE1999146180 DE19946180A DE19946180B4 DE 19946180 B4 DE19946180 B4 DE 19946180B4 DE 1999146180 DE1999146180 DE 1999146180 DE 19946180 A DE19946180 A DE 19946180A DE 19946180 B4 DE19946180 B4 DE 19946180B4
- Authority
- DE
- Germany
- Prior art keywords
- pulse
- circuit
- oscillator
- measuring
- differential
- 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.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 13
- 239000003209 petroleum derivative Substances 0.000 title claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000446 fuel Substances 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 description 7
- 239000000523 sample Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
-
- 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
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2823—Raw oil, drilling fluid or polyphasic mixtures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Schaltung zur Messung des Feuchtigkeitsgehaltes von flüssigen Erdölprodukten, insbesondere Treibstoffen, durch Untersuchung der Kapazität mit einem als Vergleichsnormal dienenden Kondensator Ko (2), der die Kapazität des flüssigen Erdölproduktes ohne Wasseranteil misst und einem Messkondensator KM (1), in den das zu messende Medium eingefüllt ist, dadurch gekennzeichnet, dass die Schaltung aus zwei synchron arbeitenden Oszillatoren (3, 4) zur Erzeugung eines aus der Kapazität des Messkondensators KM (1) abgeleiteten Rechteckimpulses TM und eines aus der Kapazität des Vergleichsnormalenkondensators Ko (2) abgeleiteten Rechteckimpulses To besteht, eine Differenzschaltung (5) zur Bildung eines Differenzimpulses ΔT aus dem Rechteckimpuls TM und dem Rechteckimpuls To angeordnet ist, dieser Differenzimpuls ΔT in einer Torschaltung (7) aus einem Impulsblock eines Impulsoszillators (6) eine Anzahl von Impulsen innerhalb des Differenzimpulses ΔT festlegt, die gezählt durch einen Impulszähler (8) einen Wert für den Feuchtigkeitsanteil des flüssigen Erdölproduktes bilden, und für eine getaktete Abgabe der Impulsblöcke des Impulsoszillators (6), zur Steuerung des Beginns der Impulsauswahl in der Torschaltung (7) und zur Steuerung des Zählers (8) ein Taktoszillator (9), der mit den Oszillatoren (3, 4) synchronisiert ist, zur Vorgabe eines Taktimpulses TT angeordnet ist.Circuit for measuring the moisture content of liquid petroleum products, in particular fuels, by examining the capacitance with a capacitor K o (2), which serves as a reference standard, which measures the capacitance of the liquid petroleum product without water content and a measuring capacitor K M (1), into which the measuring medium is filled, characterized in that the circuit consists of two synchronously operating oscillators (3, 4) for generating a square-wave pulse T M derived from the capacitance of the measuring capacitor K M (1) and one from the capacitance of the comparison standard capacitor K o (2) derived rectangular pulse T o , a differential circuit (5) for forming a differential pulse ΔT from the rectangular pulse T M and the rectangular pulse T o is arranged, this differential pulse ΔT in a gate circuit (7) from a pulse block of a pulse oscillator (6) a number of pulses within the differential pulse ΔT, which is counted by a pulse counter (8) form a value for the moisture content of the liquid petroleum product, and for a clocked delivery of the pulse blocks of the pulse oscillator (6), for controlling the start of the pulse selection in the gate circuit (7) and for controlling the counter (8) a clock oscillator (9), which is synchronized with the oscillators (3, 4), is arranged for specifying a clock pulse T T.
Description
Die Erfindung betrifft das Gebiet der Messtechnik und der elektronischen Schaltungstechnik für das Analysieren und Untersuchen von Stoffen. Sie beinhaltet eine neue, digitale Schaltung zur Messung des Feuchtigkeitsgehaltes von flüssigen Erdölprodukten, insbesondere Treibstoffen, durch Untersuchung der Kapazität.The invention relates to the field of measurement technology and electronic circuit technology for analysis and examining substances. It includes a new, digital one Circuit for measuring the moisture content of liquid petroleum products, especially fuels, by examining capacity.
Bekannt sind Messgeräte zur Messung
des Wassergehalts flüssiger
Treibstoffe, bei denen die Messwertverarbeitung durch analoge Abgleichschaltungen
erfolgt. Eine solche Schaltung ist z. B. in der sowjetischen Erfindungsbeschreibung
Ein ähnliches analoges Verfahren
zur Messung des Feuchtigkeitsgehaltes von flüssigen Erdölprodukten durch Untersuchung
der Kapazität
und eine dazugehörende
Schaltung ist in der Patentschrift
Der Nachteil der bekannten analogen Schaltungen besteht darin, dass insbesondere geringe Feuchtigkeitsanteile nicht mehr sicher erfasst und ausgewertet werden können.The disadvantage of the well-known analog Circuits consist in that in particular low levels of moisture can no longer be securely recorded and evaluated.
Aufgabe der Erfindung ist es, eine Schaltung zur Messung des Feuchtigkeitsgehaltes von Erdölprodukten durch Untersuchung der Kapazität zu schaffen, mit der bei gleichzeitiger Verein fachung des Schaltungsaufbaus eine hohe Empfindlichkeit und Genauigkeit innerhalb eines großen Messbereichs erreicht wird.The object of the invention is a Circuit for measuring the moisture content of petroleum products by examining the capacity to create with the simplification of the circuit structure at the same time achieves high sensitivity and accuracy within a large measuring range becomes.
Die Aufgabe wird mit den erfindungsgemäßen Merkmalen des 1. Patentanspruchs gelöst. Vorteilhafte Weiterentwicklungen und Ausgestaltungen sind Gegenstand der Unteransprüche.The object is achieved with the features according to the invention of the 1st claim solved. Advantageous further developments and refinements are the subject of subclaims.
Von zwei synchron miteinander verbundenen Oszillatoren werden rechteckige Impulszüge TM und To erzeugt, die aus den Meßsignalen zweier Kondensatoren, einem Vergleichsnormalenkondensator Ko und einem Messkondensator KM gebildet sind. Der Messkondensator KM ist mit dem zu messenden Medium aufgefüllt und der Vergleichsnormalenkondensator Ko ist ein Kondensator mit einer definierten Kapazität, die einem Medium ohne Wasseranteil entspricht.Rectangular pulse trains T M and T o are generated by two synchronously connected oscillators, which are formed from the measurement signals of two capacitors, a comparison standard capacitor K o and a measurement capacitor K M. The measuring capacitor K M is filled with the medium to be measured and the reference standard capacitor K o is a capacitor with a defined capacitance which corresponds to a medium without water content.
Die beiden Oszillatoren sind mit einer Schaltung zur Bildung eines Differenzimpulses ΔT und einem Taktoszillator zur Erzeugung von Taktimpulsen TT verbunden. Dieser Taktoszillator steuert einen Impulsoszillator zur blockförmigen Abgabe von Zählimpulsen, aus jedem dieser Impulsblöcke wird in einer Torschaltung ein Impulsblock der Länge des Differenzimpulses ΔT ausgewählt und die Impulse innerhalb jedes Impulsblockes der Länge ΔT werden durch einen Impulszähler zur weiteren Anzeige ausgezählt.The two oscillators are connected to a circuit for forming a differential pulse ΔT and a clock oscillator for generating clock pulses T T. This clock oscillator controls a pulse oscillator for the block-shaped delivery of counting pulses, from each of these pulse blocks a pulse block of the length of the differential pulse ΔT is selected in a gate circuit and the pulses within each pulse block of the length ΔT are counted by a pulse counter for further display.
Der Taktoszillator steuert die Arbeit des Impulszähler und bringt den Zähler vor jeder Messung in den Ausgangszustand zurück.The clock oscillator controls the work of the pulse counter and bring the counter return to the initial state before each measurement.
An Hand einer Zeichnung
Mit Hilfe einer Differenzschaltung
Ein Impulszähler
Die Impulse, die von dem Oszillator
Der Taktoszillator
Der Taktoszillator
Die zu zählenden Impulse, die in der
Zeiteinheit ΔT
von dem Impulszähler
Bei einer entsprechenden Auswahl
der Frequenz des Impulsoszillators
- 11
- Messkondensator KM Measuring capacitor K M
- 22
- Vergleichsnormalenkondensator Ko Comparison standard capacitor K o
- 33
- Oszillator 1 zur Bildung des Rechteckimpulses TM Oscillator 1 to form the rectangular pulse T M
- 44
- Oszillator 2 zur Bildung des Rechteckimpulses To Oscillator 2 to form the rectangular pulse T o
- 55
- Differenzschaltungdifferential circuit
- 66
- Impulsoszillatorpulse oscillator
- 77
- Torschaltunggate
- 88th
- Impulszählerpulse counter
- 99
- Taktoszillatorclock oscillator
- 1010
- Anzeigeeinheitdisplay unit
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999146180 DE19946180B4 (en) | 1999-09-21 | 1999-09-21 | Circuit for measuring the moisture content of liquid petroleum products by examining the capacity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999146180 DE19946180B4 (en) | 1999-09-21 | 1999-09-21 | Circuit for measuring the moisture content of liquid petroleum products by examining the capacity |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19946180A1 DE19946180A1 (en) | 2001-06-21 |
DE19946180B4 true DE19946180B4 (en) | 2004-03-11 |
Family
ID=7923405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1999146180 Expired - Fee Related DE19946180B4 (en) | 1999-09-21 | 1999-09-21 | Circuit for measuring the moisture content of liquid petroleum products by examining the capacity |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19946180B4 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2002228965A1 (en) * | 2001-12-10 | 2003-06-23 | Em-Tech Llc | Method of and apparatus for measuring the water content of crude oil |
EP2657713B1 (en) * | 2012-04-24 | 2018-08-01 | VEGA Grieshaber KG | Method and device for determining a measurement capacity |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3768006A (en) * | 1972-10-30 | 1973-10-23 | Daniel Ind Inc | Method and apparatus for direct measurement of percent |
-
1999
- 1999-09-21 DE DE1999146180 patent/DE19946180B4/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3768006A (en) * | 1972-10-30 | 1973-10-23 | Daniel Ind Inc | Method and apparatus for direct measurement of percent |
Also Published As
Publication number | Publication date |
---|---|
DE19946180A1 (en) | 2001-06-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licences declared | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee | ||
8370 | Indication of lapse of patent is to be deleted | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |