FI90919C - Method and apparatus for measuring the amount of water contained in a material - Google Patents
Method and apparatus for measuring the amount of water contained in a material Download PDFInfo
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- FI90919C FI90919C FI910784A FI910784A FI90919C FI 90919 C FI90919 C FI 90919C FI 910784 A FI910784 A FI 910784A FI 910784 A FI910784 A FI 910784A FI 90919 C FI90919 C FI 90919C
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- water
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Description
i 90919i 90919
MENETELMÅ ja laite materiaalin sisåltaman VESIMAÅRAN MITTAAMISEKSIMETHOD AND APPARATUS FOR MEASURING THE WATER VOLUME IN THE MATERIAL
Keksinnon kohteena on menetelma ja laite materiaalin sisSltåmån vesimaårån mittaamiseksi.The invention relates to a method and an apparatus for measuring the amount of water contained in a material.
Nykyisin kåytosså olevat vesimaaråa mittaavat lait-teet ovat joko jatkuvatoimisia tai jaksottain nayt-teita ottavia. Jatkuvatoimiset laitteet perustuvat yleensa voiman mittaukseen, infrapunamittaukseen, op-tiseen mittaukseen, mikroaaltomittaukseen tai ra-dioaktiiviseen mittaukseen.The water volume measuring devices currently in use are either continuous or periodically sampled. Continuous devices are usually based on force measurement, infrared measurement, optical measurement, microwave measurement or radioactive measurement.
Nykyisillå mittalaitteilla ei kuitenkaan pystyta mit-taamaan vesimåaria materiaaleista, joiden kuiva-aine-pitoisuus on suuri tai laitteet eivåt mittaa suuria materiaalimååriå kokonaisuudessaan, vaan mittaavat yleensM mittarin valittomåstS laheisyydestS tai otta-vat nSytteen materiaalista mahdollisesti antaen koko-naisuudesta vaaran tuloksen veden ollessa epåhomogee-nisesti jakautuneena materiaalissa. Samoin mittarit mittaavat våarin veden faasin vaihtuessa. Mittareita ei ole kehitetty myoskMan mittamaan useita veden faase ja yhtaaikaa. Yleenså mittarit mittaavat virheelli-sesti myos lampotilan, kuiva-aineen varin tai optis-ten ominaisuuksien muuttuessa.However, current measuring devices are not able to measure water levels from materials with a high dry matter content or do not measure large amounts of material as a whole, but generally measure the meter from indiscriminate proximity or take a sample of the material, possibly withheld from water. distributed in the material. Similarly, the meters measure the color as the water phase changes. Meters have not been developed to measure multiple water phases and simultaneously. Generally, meters also incorrectly measure temperature, dry matter color, or optical properties.
Keksinnon mukaisella menetelmMUM ja laitteella saa-daan aikaan ratkaiseva parannus esitetyissa epakoh-dissa. Taman toteuttamiseksi keksinnon mukaiselle me-netelmalle ja laitteelle on ominaista se, mita patentt ivaatimuksen 1 ja 3 tunnusmerkkiosissa on esi-tetty.The method and device according to the invention provide a decisive improvement in the above-mentioned drawbacks. To achieve this, the method and the device according to the invention are characterized by what is set forth in the characterizing parts of claims 1 and 3.
Keksinnon tarkeimpinM etuina voidaan pitåM sen kykyå jatkuvatoimisesti mitata vesimaaria myos materiaa- 2 leista, joissa on suuria kiintoainemååriå. Lisaksi menetelmållå ja laitteella voidaan mitata vesimååråå olipa vesi misså faasissa tahansa ja siten låmpotila voi vaihdella laajassa skaalassa. Lisaksi se mittaa vesimåårån halutun suuruisesta materiaalimååråstå ei-ka ainoastaan mittarin vålittomåstå låheisyydestå tai tietysta nåytteenottokohdasta. Se ei myoskåån ole riippuvainen materiaalin optisista ominaisuuksista.The most important advantages of the invention are its ability to continuously measure water content even from materials with large amounts of solids. In addition, the method and the device can measure the amount of water in any phase and thus the temperature can vary on a large scale. In addition, it measures the amount of water from the desired amount of material, not only from the immediate proximity of the meter or from a particular sampling point. It also does not depend on the optical properties of the material.
Menetelman eråasså sovellutuksessa (kuva 1) materiaa-li virtaa metallilieridsså, joka muodostaa yhden (ulko-) elektrodin 1). Tåmån lierion keskelle on sijoi-tettu toinen (siså-)elektrodi 2). Nåiden vålille joh-detaan vakiosåhkokenttå. Såhkovuon tiheys on riippuvainen materiaalin kuiva-aineen ja veden permittivi-teetistå. Yleenså materiaalin polarisoitumisesta joh-tuva kiintoaineen permittiviteetti on hyvin paljon pienempi kuin veden permittiviteetti ja hyvin låhellå ilman permittiviteettiå. Siten mittaamalla materiaalin låpåisevåå virtaa saadaan vesimolekyylien mååråån verrannollinen tulos.In one embodiment of the method (Figure 1), the material flows in a metal cylinder which forms one (outer) electrode 1). A second (inner) electrode 2) is placed in the middle of this lesion. A standard electric field is routed between them. The density of the electric flux depends on the permeability of the dry matter and water of the material. In general, the permeability of the solid due to the polarization of the material is very much lower than the permeability of water and very close to the permeability of air. Thus, by measuring the current flowing through the material, a result proportional to the number of water molecules is obtained.
Kuvan 1 mukaisen laitteen keskielektrodiin kytketty elektroniikkayksikdn låhetin 3) låhettåå materiaaliin vakiojånnitteisen ja vakiotaajuisen signaalin. Mitå suureropi on aineen permittiviteetti, sitå suurempi on materiaalin låpåisevå virta. Virtasignaali mitataan ja muutetaan mittamuuntajassa 4) tasavirraksi, joka on verrannollinen veden mååråån ja luettavissa nåyt-tolaitteelta.The transmitter of the electronics unit connected to the central electrode of the device according to Fig. 1 3) transmits a constant voltage and a constant frequency signal to the material. The greater the permeability of a substance, the greater the current through the material. The current signal is measured and converted in a measuring transformer 4) to a direct current that is proportional to the amount of water and can be read from the display device.
Mittauspaikan maantieteellisestå sijainnista riippuen saattaa veden permittiviteetti vaihdella vuodenaiko-jen mukaan. Keksinnon mukaiseen menetelmåån kuuluu toisella elektrodi11a tapahtuva kompensointimittaus, jolla mitataan pelkån esiintyvån veden permittivi-Depending on the geographical location of the measurement site, the permeability of the water may vary according to the seasons. The method according to the invention includes a compensation measurement at the second electrode 11a, which measures only the permittivity of the water present.
IIII
90919 3 teettiå ja elektroniikkayksikosså kompensoidaan mah-dolliset vaihtelut.90919 3 and the electronics unit compensates for possible variations.
Menetelman eraasså toisessa sovellutuksessa (kuva 2) sijaitsee materiaali kahden elektrodin vålisså, josta mittaus suoritetaan samalla menetelmallaIn another embodiment of the method (Figure 2), the material is located between two electrodes, from which the measurement is performed by the same method
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI910784A FI90919C (en) | 1991-02-18 | 1991-02-18 | Method and apparatus for measuring the amount of water contained in a material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI910784 | 1991-02-18 | ||
FI910784A FI90919C (en) | 1991-02-18 | 1991-02-18 | Method and apparatus for measuring the amount of water contained in a material |
Publications (4)
Publication Number | Publication Date |
---|---|
FI910784A0 FI910784A0 (en) | 1991-02-18 |
FI910784A FI910784A (en) | 1992-08-19 |
FI90919B FI90919B (en) | 1993-12-31 |
FI90919C true FI90919C (en) | 1994-04-11 |
Family
ID=8531939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI910784A FI90919C (en) | 1991-02-18 | 1991-02-18 | Method and apparatus for measuring the amount of water contained in a material |
Country Status (1)
Country | Link |
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FI (1) | FI90919C (en) |
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1991
- 1991-02-18 FI FI910784A patent/FI90919C/en active
Also Published As
Publication number | Publication date |
---|---|
FI910784A0 (en) | 1991-02-18 |
FI910784A (en) | 1992-08-19 |
FI90919B (en) | 1993-12-31 |
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