LT4584B - A gas sensor - Google Patents
A gas sensor Download PDFInfo
- Publication number
- LT4584B LT4584B LT98-205A LT98205A LT4584B LT 4584 B LT4584 B LT 4584B LT 98205 A LT98205 A LT 98205A LT 4584 B LT4584 B LT 4584B
- Authority
- LT
- Lithuania
- Prior art keywords
- gas
- contacts
- gas sensor
- sensitive
- polyethylene film
- Prior art date
Links
- 229920000573 polyethylene Polymers 0.000 claims abstract description 9
- -1 polyethylene Polymers 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- BWFPGXWASODCHM-UHFFFAOYSA-N copper monosulfide Chemical compound [Cu]=S BWFPGXWASODCHM-UHFFFAOYSA-N 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
Description
Išradimas priklauso dujoms jautrių jutiklių sukūrimo sričiai ir gali būti panaudotas aplinkos dujų koncentracijos nustatymui.The present invention relates to the development of gas-sensitive sensors and can be used to determine ambient gas concentrations.
Žinomas dujų jutiklis, sudarytas iš izoliuojančio padėklo, kontaktų ir puslaidininkinio organinio polimero, kurio elektrinės savybės priklauso nuo aplinkos dujų mišinio sudėties ir koncentracijos ( žiūr. JAV patentą Nr.4887455, TPK G01N27/02, 1989).A known gas sensor consisting of an insulating substrate, contacts, and semiconductor organic polymer whose electrical properties depend on the composition and concentration of the ambient gas mixture (see U.S. Patent No. 4,887,455, TPK G01N27 / 02, 1989).
Jo trūkumas tas, kad, naudojant šį dujų jutiklį, matavimai yra sudėtingi, reikalingas kintamasis elektrinis laukas, kadangi polimerų varža yra labai didelė. Jutiklis yra nestabilus laike.Its disadvantage is that the measurement of this gas sensor is complicated and requires a variable electric field as the impedance of the polymers is very high. The sensor is unstable in time.
Artimiausi siūlomam sprendimui yra dujų jutikliai, sudaryti iš dujoms jautraus sluoksnio, izoliuojančio padėklo, kontaktų ir kaitinimo elemento. Dujoms jautrūs sluoksniai yra įvairių metalų oksidai ( žiūr. Didž. Britanijos patentą Nr.2166247, TPK G01N27/12, 1986).The closest to the proposed solution are gas sensors consisting of a gas-sensitive layer, an insulating pad, contacts and a heating element. The gas-sensitive layers are oxides of various metals (see British Patent No. 2166247, TPK G01N27 / 12, 1986).
Tokių jutiklių trūkumas tas, kad jie dirba aukštose temperatūrose (200-500°C), yra neekonomiški.The disadvantage of such sensors is that they operate at high temperatures (200-500 ° C) and are uneconomic.
Siūlomo išradimo tikslas - supaprastinti matavimus kambario (aplinkos) temperatūroje, panaudojant polietileno plėveles su vario sulfido dangomis.The object of the present invention is to simplify measurements at room (ambient) temperature using polyethylene films with copper sulfide coatings.
Tikslas pasiekiamas tuo, kad dujų jutiklis susideda iš izoliuojančio polietileno plėvelės padėklo, dujoms jautraus sluoksnio ir planarinių metalo ( pavyzdžiui, vario ) kontaktų. Dujoms jautrus elementas yra polietileno plėvelė su elektrai laidžiomis dangomis. Kaip elektrai laidžios dangos ant polietileno plėvelės yra suformuoti vario sulfido sluoksniai. Matuojamas dujoms jautraus elemento elektrinio laidumo pastoviai srovei pokytis, indukuotas tiriamų aplinkos dujų. Čia panaudojama iki šiol nežinoma vario sulfido dangų ant polietileno savybė - jautris dujoms kambario temperatūroje.The objective is achieved by the gas sensor consisting of an insulating polyethylene film pad, a gas-sensitive layer and planar metal (e.g. copper) contacts. The gas-sensitive element is a polyethylene film with electrically conductive coatings. Copper sulphide layers are formed as electrically conductive coatings on polyethylene film. The change in the electrical conductivity of the gas-sensitive element to the constant current induced by the ambient gas under investigation is measured. The hitherto unknown feature of copper sulphide coatings on polyethylene is its sensitivity to gas at room temperature.
Išradimas iliustruojamas brėžiniu: fig.l - principinė dujų jutiklio struktūrinė schema.The invention is illustrated in the drawing: FIG.
Dujų jutiklis sudarytas iš polietileno plėvelės padėklo 1, ant kurio suformuotos dujoms jautrios CuxS dangos 2, ir ant jų užlydyti planariniai metalo kontaktai 3.The gas sensor consists of a polyethylene film substrate 1, on which gas-sensitive Cu x S coatings 2 are formed, and planar metal contacts 3 are fused thereto.
Dujų koncentracija nustatoma prie kontaktų pritvirtinus elektrinius įvadus ir išmatavus varžos pokytį.The gas concentration is determined by attaching electrical inlets to the contacts and measuring the change in resistance.
Siūlomas išradimas, palyginus jį su žinomu, pasižymi šiais privalumais:The present invention has the following advantages over the prior art:
- leidžia žymiai sumažinti dujų jutiklių darbo temperatūrą (200500°C iki kambario temperatūros),- allows a significant reduction in the operating temperature of the gas sensors (200500 ° C to room temperature),
- paprastas (nesudėtingas) elektrai laidžių vario sulfidų dangų gavimo būdas ( žiūr.Lietuvos Respublikos patentą LT 4111 B),- simple (simple) method of preparation of electrically conductive copper sulphide coatings (see Patent of the Republic of Lithuania LT 4111 B),
- naudojamos medžiagos yra nedeficitinės ir pigios.- the materials used are non-specific and cheap.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LT98-205A LT4584B (en) | 1998-12-30 | 1998-12-30 | A gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LT98-205A LT4584B (en) | 1998-12-30 | 1998-12-30 | A gas sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| LT98205A LT98205A (en) | 1999-07-26 |
| LT4584B true LT4584B (en) | 1999-12-27 |
Family
ID=19722048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LT98-205A LT4584B (en) | 1998-12-30 | 1998-12-30 | A gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| LT (1) | LT4584B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2166247A (en) | 1984-10-25 | 1986-04-30 | Atomic Energy Authority Uk | Gas sensors |
| US4887455A (en) | 1987-04-06 | 1989-12-19 | Cogent Limited | Gas sensor |
| LT4111B (en) | 1995-05-01 | 1997-02-25 | Univ Kauno Tech | Process for preparing the electrical conductive coatings on polyethylene |
-
1998
- 1998-12-30 LT LT98-205A patent/LT4584B/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2166247A (en) | 1984-10-25 | 1986-04-30 | Atomic Energy Authority Uk | Gas sensors |
| US4887455A (en) | 1987-04-06 | 1989-12-19 | Cogent Limited | Gas sensor |
| LT4111B (en) | 1995-05-01 | 1997-02-25 | Univ Kauno Tech | Process for preparing the electrical conductive coatings on polyethylene |
Also Published As
| Publication number | Publication date |
|---|---|
| LT98205A (en) | 1999-07-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MM9A | Lapsed patents |
Effective date: 20001230 |