CA2035909A1 - Measurement coupling for low capacitances - Google Patents
Measurement coupling for low capacitancesInfo
- Publication number
- CA2035909A1 CA2035909A1 CA002035909A CA2035909A CA2035909A1 CA 2035909 A1 CA2035909 A1 CA 2035909A1 CA 002035909 A CA002035909 A CA 002035909A CA 2035909 A CA2035909 A CA 2035909A CA 2035909 A1 CA2035909 A1 CA 2035909A1
- Authority
- CA
- Canada
- Prior art keywords
- measurement
- capacitances
- oscillator
- measured
- coupling
- 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.)
- Abandoned
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 38
- 238000010168 coupling process Methods 0.000 title claims abstract description 38
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 38
- 238000005259 measurement Methods 0.000 title claims abstract description 37
- 238000007600 charging Methods 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 101150038444 Ment gene Proteins 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 235000019988 mead Nutrition 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI900592A FI84666C (fi) | 1990-02-07 | 1990-02-07 | Maetkoppling foer smao kapasitanser. |
| FI900592 | 1990-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2035909A1 true CA2035909A1 (en) | 1991-08-08 |
Family
ID=8529843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002035909A Abandoned CA2035909A1 (en) | 1990-02-07 | 1991-02-07 | Measurement coupling for low capacitances |
Country Status (9)
| Country | Link |
|---|---|
| AU (1) | AU6949191A (pt) |
| BR (1) | BR9100486A (pt) |
| CA (1) | CA2035909A1 (pt) |
| DE (1) | DE4103433A1 (pt) |
| FI (1) | FI84666C (pt) |
| FR (1) | FR2657963A1 (pt) |
| GB (1) | GB2242279A (pt) |
| IT (1) | IT1245137B (pt) |
| ZA (1) | ZA91506B (pt) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19513022C1 (de) * | 1995-04-06 | 1996-08-14 | Siemens Ag | Schaltungsanordnung und Verfahren zur Bestimmung von Kapazitätsdifferenzen |
| DE19625666C1 (de) * | 1996-06-26 | 1998-01-15 | Siemens Ag | Ausleseschaftung und kapazitiv messender Senser |
| DE102004006020A1 (de) | 2004-02-06 | 2005-08-25 | E + E Elektronik Ges.M.B.H. | Schaltungsanordnung zur kapazitiven Feuchtemessung und Verfahren zum Betrieb derselben |
| US8030949B2 (en) * | 2008-10-31 | 2011-10-04 | Testo Ag | Measurement method for determining moisture content |
| CN101738422B (zh) * | 2009-12-23 | 2012-09-05 | 北京宝力马传感技术有限公司 | 一种湿度测量装置及方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3886447A (en) * | 1972-05-17 | 1975-05-27 | Iwatsu Electric Co Ltd | Capacitance-voltage converter |
| GB2058364B (en) * | 1979-09-01 | 1983-03-23 | Ferranti Ltd | Capacitance measuring apparatus |
| US4794320A (en) * | 1987-08-10 | 1988-12-27 | Moore Products Co. | Multi-frequency capacitance sensor |
-
1990
- 1990-02-07 FI FI900592A patent/FI84666C/fi not_active IP Right Cessation
-
1991
- 1991-01-21 AU AU69491/91A patent/AU6949191A/en not_active Abandoned
- 1991-01-23 ZA ZA91506A patent/ZA91506B/xx unknown
- 1991-01-29 GB GB9101869A patent/GB2242279A/en not_active Withdrawn
- 1991-02-05 DE DE4103433A patent/DE4103433A1/de not_active Ceased
- 1991-02-06 BR BR919100486A patent/BR9100486A/pt not_active Application Discontinuation
- 1991-02-06 IT ITMI910300A patent/IT1245137B/it active IP Right Grant
- 1991-02-07 FR FR9101380A patent/FR2657963A1/fr active Pending
- 1991-02-07 CA CA002035909A patent/CA2035909A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| FR2657963A1 (fr) | 1991-08-09 |
| DE4103433A1 (de) | 1991-08-08 |
| FI84666B (fi) | 1991-09-13 |
| AU6949191A (en) | 1991-08-08 |
| FI84666C (fi) | 1991-12-27 |
| FI900592A (fi) | 1991-08-08 |
| IT1245137B (it) | 1994-09-13 |
| BR9100486A (pt) | 1991-10-29 |
| GB2242279A (en) | 1991-09-25 |
| ZA91506B (en) | 1991-10-30 |
| FI900592A0 (fi) | 1990-02-07 |
| GB9101869D0 (en) | 1991-03-13 |
| ITMI910300A0 (it) | 1991-02-06 |
| ITMI910300A1 (it) | 1992-08-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |