NO167106B - DEVICE FOR MEASURING THE FLUID LEVEL. - Google Patents
DEVICE FOR MEASURING THE FLUID LEVEL. Download PDFInfo
- Publication number
- NO167106B NO167106B NO891869A NO891869A NO167106B NO 167106 B NO167106 B NO 167106B NO 891869 A NO891869 A NO 891869A NO 891869 A NO891869 A NO 891869A NO 167106 B NO167106 B NO 167106B
- Authority
- NO
- Norway
- Prior art keywords
- liquid
- tank
- pressure transmitter
- probes
- probe
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title 1
- 239000007788 liquid Substances 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 12
- 235000014676 Phragmites communis Nutrition 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
Oppfinnelsen vedrører et system for nivåmåling av væsker The invention relates to a system for level measurement of liquids
i tanker eller sisterner eller andre beholdere for lagring av væsker ved hjelp av en trykktransraitter plasert ved bunden av tankene. Væskemengden i tankene ønskes da nesten unisont uttrykt i ram. væskehøide. in tanks or cisterns or other containers for storing liquids by means of a pressure transducer placed at the bottom of the tanks. The amount of liquid in the tanks is then expressed almost in unison in the frame. liquid height.
Vanskelighetene ved denne konvertering av trykk til The difficulties in this conversion of pressure to
væskehøide er da vesentlig: liquid height is then essential:
1 Den sp.vekt av væsken er ikke kjent og ved f.eks olje forskjellig fra fylling til fylling og fra de forskjel- lige oljesorter. 2. Temperaturen i væsken er ikke kjent, For de fleste oljesorters vedkommende vil dette innebære at nivået stiger med ca. o»7 mm. pr. grad C. pr. meter væskehøide Ved en tank med 10 meter oljehøide utgjør dette således ca. 7 mm. pr. grad C. , og kan lett utgjøre over 100 mm. 1 The sp. weight of the liquid is not known and in the case of oil, for example, differs from filling to filling and from the different straight oils. 2. The temperature in the liquid is not known. For most types of oil, this will mean that the level rises by approx. o»7 mm. per degree C. per meters of liquid height In the case of a tank with 10 meters of oil height, this thus amounts to approx. 7 mm. per degree C., and can easily amount to over 100 mm.
Dette ansees som helt ubrukelig nivåmåling. This is considered a completely useless level measurement.
3. Trykktransmitteren sitter litt opp fra tankens bund. 3. The pressure transmitter sits slightly above the bottom of the tank.
Dette kan imidlertid måles men kommer ikke frem som et However, this can be measured but does not appear as one
tilleggstrykk, men som et antall mm. væskehøide. additional pressure, but as a number of mm. liquid height.
Ifølge denne oppfinnelse løses disse problemer med en anordning slik den fremgår av de etterfølgende patentkrav. According to this invention, these problems are solved with a device as it appears from the subsequent patent claims.
Oppfinnelsen skal nå beskrives under henvisning til tegninge n The invention will now be described with reference to drawings n
1. På toppen av tanken (1) monteres en panserslange (2) av rustfritt stål eller annet jernfritt materiale ned til bundenden av tanken, inne i denne monteres en led— ningsslange med innmonterte reedreleer (7) i forskjellig høide oppover. 2. På yttersiden av panserslangen tres en flottør(3) med påmonterte fastmagneter (A). Denne gis en form så den kan flyte i væsken (6) og bevege sig opp og ned i takt væskehøiden. 3. Ved å utmåle de høider over tankbunden hvor disse releer slår inn, får man en nøiaktig verdi i mm. for hvor disse innslag skjer i forhold til bunden av tanken i mm. 4. Istedenfor reeder og magneter på flottør kan også an-vendes andre væskesensitive sonder som f.eks. optokob— lere, termosonder eller sen sitive kondensatorer, og som plaseres i kjente avstander fra bund»1. On the top of the tank (1), an armored hose (2) made of stainless steel or other non-ferrous material is mounted down to the bottom end of the tank, inside this is mounted a cable hose with built-in reed relays (7) at different heights upwards. 2. Thread a float (3) with fixed magnets (A) on the outside of the armored hose. This is given a shape so that it can float in the liquid (6) and move up and down in time with the liquid height. 3. By measuring the heights above the tank bottom where these relays kick in, you get an accurate value in mm. for where these features occur in relation to the bottom of the tank in mm. 4. Instead of reeders and magnets on a float, other liquid-sensitive probes such as e.g. optocouplers, thermoprobes or sen sitive capacitors, and which are placed at known distances from the base"
Ifian kan så lagre de i pkt. 3 målter verdier som sondene vil slå inn på i en PC. eller en PLS.. Når så et innslag kommer fra en av sondene vil det av trykktransmitteren(5) avgivne signal bli sammenlignet de for vedk. sonde lagrede verdi. PC'.ens regneverk vil da omregne differansen mellem de to verdier til en korreksjonsfaktor som vil bli tilført fremtidige målinger. I tillegg til den nye verdi vil da også bli addert den i pkt. 3 målte verdi for avstand til bund av trykktransmitteren. Ifian can then store the measured values in point 3, which the probes will input into a PC. or a PLC.. When an input comes from one of the probes, the signal given by the pressure transmitter (5) will be compared to those for probe stored value. The PC's calculator will then convert the difference between the two values into a correction factor that will be added to future measurements. In addition to the new value, the value measured in point 3 for the distance to the bottom of the pressure transmitter will also be added.
Ved å utnytte de ovenfor nevnte korreksjonsfaktorer ved etterfølgende avlesninger til å få korrigert de av trykktransmitteren givne data vil alle fremtidige avlesninger bli korrigert, inntil væskenivået treffer en ny sonde, eller den samme sonde om igjen. Da vil en ny korreksjonsfaktor kunne erholdes o som så vil gi korrekte data videre fremover. By utilizing the above-mentioned correction factors for subsequent readings to correct the data given by the pressure transmitter, all future readings will be corrected, until the liquid level hits a new probe, or the same probe again. Then a new correction factor can be obtained, which will then provide correct data going forward.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO891869A NO167106C (en) | 1989-05-08 | 1989-05-08 | DEVICE FOR MEASURING THE FLUID LEVEL. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO891869A NO167106C (en) | 1989-05-08 | 1989-05-08 | DEVICE FOR MEASURING THE FLUID LEVEL. |
Publications (4)
Publication Number | Publication Date |
---|---|
NO891869D0 NO891869D0 (en) | 1989-05-08 |
NO891869L NO891869L (en) | 1990-11-09 |
NO167106B true NO167106B (en) | 1991-06-24 |
NO167106C NO167106C (en) | 1991-10-02 |
Family
ID=19891999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO891869A NO167106C (en) | 1989-05-08 | 1989-05-08 | DEVICE FOR MEASURING THE FLUID LEVEL. |
Country Status (1)
Country | Link |
---|---|
NO (1) | NO167106C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999030118A1 (en) * | 1997-12-09 | 1999-06-17 | Nical Norge As | Method and device for checking and calibrating level gauges and switches |
-
1989
- 1989-05-08 NO NO891869A patent/NO167106C/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999030118A1 (en) * | 1997-12-09 | 1999-06-17 | Nical Norge As | Method and device for checking and calibrating level gauges and switches |
Also Published As
Publication number | Publication date |
---|---|
NO891869L (en) | 1990-11-09 |
NO167106C (en) | 1991-10-02 |
NO891869D0 (en) | 1989-05-08 |
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