DE2753884A1 - Kapazitiver messwandler - Google Patents
Kapazitiver messwandlerInfo
- Publication number
- DE2753884A1 DE2753884A1 DE19772753884 DE2753884A DE2753884A1 DE 2753884 A1 DE2753884 A1 DE 2753884A1 DE 19772753884 DE19772753884 DE 19772753884 DE 2753884 A DE2753884 A DE 2753884A DE 2753884 A1 DE2753884 A1 DE 2753884A1
- Authority
- DE
- Germany
- Prior art keywords
- current
- capacitor
- circuit
- measuring
- charging
- 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.)
- Withdrawn
Links
- 239000003990 capacitor Substances 0.000 claims description 63
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Measuring Fluid Pressure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/747,403 US4145619A (en) | 1976-12-03 | 1976-12-03 | Two wire capacitance transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2753884A1 true DE2753884A1 (de) | 1978-06-08 |
Family
ID=25004913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772753884 Withdrawn DE2753884A1 (de) | 1976-12-03 | 1977-12-02 | Kapazitiver messwandler |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4145619A (enExample) |
| JP (1) | JPS6027076B2 (enExample) |
| DE (1) | DE2753884A1 (enExample) |
| FR (1) | FR2373038A1 (enExample) |
| GB (1) | GB1561947A (enExample) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3201198A1 (de) * | 1981-01-29 | 1982-09-02 | ASEA AB, 72183 Västerås | "kapazitiver geber zur anzeige oder registrierung von messgroessen" |
| DE3308973A1 (de) * | 1982-03-29 | 1983-09-29 | Smiths Industries Public Ltd. Co., London | Fluessigstandsmesssystem |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT367211B (de) * | 1979-08-29 | 1982-06-11 | List Hans | Kapazitiver messwandler |
| US4387601A (en) * | 1980-07-01 | 1983-06-14 | Hokushin Electric Works, Ltd. | Capacitance type displacement conversion device |
| US5083091A (en) * | 1986-04-23 | 1992-01-21 | Rosemount, Inc. | Charged balanced feedback measurement circuit |
| US4791352A (en) * | 1986-07-17 | 1988-12-13 | Rosemount Inc. | Transmitter with vernier measurement |
| US4783659A (en) * | 1986-08-22 | 1988-11-08 | Rosemount Inc. | Analog transducer circuit with digital control |
| US4748852A (en) * | 1986-10-10 | 1988-06-07 | Rosemount Inc. | Transmitter with an improved span adjustment |
| US5135485A (en) * | 1991-02-25 | 1992-08-04 | Louis Cohen | Capacitance-type fluid level sensor for i.v. and catheter bags |
| US5485092A (en) * | 1991-08-01 | 1996-01-16 | Fortin; Gabriel | Method and device for electrostatically investigating surface and sub-surface structures |
| US5237285A (en) * | 1991-10-18 | 1993-08-17 | Rosemount Inc. | Method and apparatus for capacitance temperature compensation and manufacturability in a dual plate capacitive pressure transmitter |
| US5838241A (en) * | 1996-12-18 | 1998-11-17 | Robertshaw Controls Company | Liquid level transmitter |
| US6516672B2 (en) | 2001-05-21 | 2003-02-11 | Rosemount Inc. | Sigma-delta analog to digital converter for capacitive pressure sensor and process transmitter |
| GB0121418D0 (en) * | 2001-09-04 | 2001-10-24 | Smiths Group Plc | Capacitance measuring systems |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3543046A (en) * | 1969-04-14 | 1970-11-24 | Fisher Governor Co | Capacitance-measuring techniques |
| US3811051A (en) * | 1972-11-03 | 1974-05-14 | Robertshaw Controls Co | Capacitance responsive detector system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3482234A (en) * | 1965-06-22 | 1969-12-02 | Bendix Corp | Signal comparator for minimizing nuisance failure alarms |
| US3555534A (en) * | 1967-03-10 | 1971-01-12 | North American Rockwell | Proximity detector with a sensing probe |
| FR1526273A (fr) * | 1967-04-13 | 1968-05-24 | Schlumberger Instrumentation | Dispositif pour la mesure des condensateurs électriques |
| US3612997A (en) * | 1970-02-18 | 1971-10-12 | John Paulkovich | Capacitor apparatus including a reference capacitor for controlling the current flow through a capacitance being measured |
| US3829850A (en) * | 1971-12-17 | 1974-08-13 | Tyco Laboratories Inc | Proximity detector |
-
1976
- 1976-12-03 US US05/747,403 patent/US4145619A/en not_active Expired - Lifetime
-
1977
- 1977-12-02 DE DE19772753884 patent/DE2753884A1/de not_active Withdrawn
- 1977-12-02 JP JP52144912A patent/JPS6027076B2/ja not_active Expired
- 1977-12-02 FR FR7736351A patent/FR2373038A1/fr active Granted
- 1977-12-02 GB GB50369/77A patent/GB1561947A/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3543046A (en) * | 1969-04-14 | 1970-11-24 | Fisher Governor Co | Capacitance-measuring techniques |
| US3811051A (en) * | 1972-11-03 | 1974-05-14 | Robertshaw Controls Co | Capacitance responsive detector system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3201198A1 (de) * | 1981-01-29 | 1982-09-02 | ASEA AB, 72183 Västerås | "kapazitiver geber zur anzeige oder registrierung von messgroessen" |
| DE3308973A1 (de) * | 1982-03-29 | 1983-09-29 | Smiths Industries Public Ltd. Co., London | Fluessigstandsmesssystem |
Also Published As
| Publication number | Publication date |
|---|---|
| US4145619A (en) | 1979-03-20 |
| FR2373038A1 (fr) | 1978-06-30 |
| JPS6027076B2 (ja) | 1985-06-27 |
| GB1561947A (en) | 1980-03-05 |
| FR2373038B1 (enExample) | 1984-03-09 |
| JPS5370853A (en) | 1978-06-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8139 | Disposal/non-payment of the annual fee |