CA1053772A - Apparatus for monitoring the liquid level in a tank - Google Patents
Apparatus for monitoring the liquid level in a tankInfo
- Publication number
- CA1053772A CA1053772A CA247,079A CA247079A CA1053772A CA 1053772 A CA1053772 A CA 1053772A CA 247079 A CA247079 A CA 247079A CA 1053772 A CA1053772 A CA 1053772A
- Authority
- CA
- Canada
- Prior art keywords
- bridge
- output
- current
- testing
- coupled
- 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.)
- Expired
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 9
- 238000012544 monitoring process Methods 0.000 title claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 69
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000012806 monitoring device Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000009434 installation Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000013021 overheating Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
- G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Control Of Non-Electrical Variables (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2510356A DE2510356C2 (de) | 1975-03-10 | 1975-03-10 | Einrichtung zur Überwachung des Flüssigkeitsstandes in einem Behälter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1053772A true CA1053772A (en) | 1979-05-01 |
Family
ID=5940916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA247,079A Expired CA1053772A (en) | 1975-03-10 | 1976-03-04 | Apparatus for monitoring the liquid level in a tank |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4053874A (enEXAMPLES) |
| JP (1) | JPS6018924B2 (enEXAMPLES) |
| BE (1) | BE839312A (enEXAMPLES) |
| BR (1) | BR7601006A (enEXAMPLES) |
| CA (1) | CA1053772A (enEXAMPLES) |
| CH (1) | CH591683A5 (enEXAMPLES) |
| DE (1) | DE2510356C2 (enEXAMPLES) |
| FR (1) | FR2304063A1 (enEXAMPLES) |
| GB (1) | GB1536894A (enEXAMPLES) |
| IN (1) | IN142779B (enEXAMPLES) |
| IT (1) | IT1056854B (enEXAMPLES) |
| SE (1) | SE411956B (enEXAMPLES) |
| SU (1) | SU625636A3 (enEXAMPLES) |
| ZA (1) | ZA76169B (enEXAMPLES) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4224606A (en) * | 1979-03-21 | 1980-09-23 | Honeywell Inc. | Fluid level detector test switch |
| CA1149459A (en) * | 1980-01-07 | 1983-07-05 | Juergen F. Schmelzer | Measuring the moisture content of materials |
| DE3022398A1 (de) | 1980-06-14 | 1982-01-07 | Vdo Adolf Schindling Ag, 6000 Frankfurt | Einrichtung zum elektrischen ueberwachen des niveaus einer in einem behaelter enthaltenen fluessigkeit |
| US4418035A (en) * | 1981-05-27 | 1983-11-29 | Scandpower, Inc. | Coolant condition monitor for nuclear power reactor |
| US4406011A (en) * | 1981-06-16 | 1983-09-20 | Burns Thomas J | Gamma thermometer based reactor core liquid level detector |
| CA1169947A (en) * | 1981-08-20 | 1984-06-26 | Howard R. Braun | Liquid nitrogen level controller |
| US4426617A (en) | 1982-06-16 | 1984-01-17 | General Dynamics, Pomona Division | Audible test device |
| US4521373A (en) * | 1982-08-23 | 1985-06-04 | General Electric Company | Liquid level sensor |
| AT383677B (de) * | 1983-10-07 | 1987-08-10 | Kessel Loos Kg Bischofshofen | Pruefeinrichtung zur ueberpruefung einer fluessigkeitsmangelsicherung |
| US4564834A (en) * | 1983-10-11 | 1986-01-14 | General Motors Corporation | Thermal liquid level detector |
| IT8353823V0 (it) * | 1983-10-14 | 1983-10-14 | Foredit Spa | Dispositivo misuratore di livello per liquidi particolarmente per la rilevazione del livello del lubrificante in motori a combustione interna |
| DE3408824A1 (de) * | 1984-03-10 | 1985-09-12 | Vdo Adolf Schindling Ag, 6000 Frankfurt | Schaltungsanordnung zur elektrothermischen, umgebungstemperatur-kompensierten fuellstandsmessung |
| US4609913A (en) * | 1985-02-22 | 1986-09-02 | Wickes Manufacturing Company | Fluid level sensor |
| US5167153A (en) * | 1986-04-23 | 1992-12-01 | Fluid Components, Inc. | Method of measuring physical phenomena using a distributed RTD |
| US5117216A (en) * | 1986-04-23 | 1992-05-26 | Fluid Components, Inc. | Distributed RTD |
| EP0263226B1 (en) * | 1986-10-08 | 1990-01-10 | Kurt Professor Becker | A method and an instrument for monitoring the cooling conditions in a light water reactor |
| US4742244A (en) * | 1986-10-15 | 1988-05-03 | Itt Avionics | Electronic float switch apparatus |
| US4771271A (en) * | 1987-03-11 | 1988-09-13 | Ford Motor Company | Silicon based low level liquid sensor having a fast response time |
| US4994780A (en) * | 1988-05-02 | 1991-02-19 | Fluid Components, Inc. | Heated extended resistance temperature sensor, apparatus for sensing and method of making same |
| US5201223A (en) * | 1988-05-02 | 1993-04-13 | Fluid Components, Inc. | Method of sensing fluid flow and level employing a heated extended resistance temperature sensor |
| US5152049A (en) * | 1988-05-02 | 1992-10-06 | Fluid Components, Inc. | Method of making a heated extended resistance temperature sensor |
| US5134772A (en) * | 1988-05-02 | 1992-08-04 | Fluid Components, Inc. | Method of making a U-shaped heated extended resistance temperature sensor |
| US5111692A (en) * | 1990-03-27 | 1992-05-12 | Fluid Components, Inc. | Temperature compensated liquid level and fluid flow sensor |
| US5438866A (en) * | 1990-06-25 | 1995-08-08 | Fluid Components, Inc. | Method of making average mass flow velocity measurements employing a heated extended resistance temperature sensor |
| US5228340A (en) * | 1991-05-01 | 1993-07-20 | Yazaki Corporation | Method and apparatus for heat radiating type level sensor measurement of liquid level |
| US5210769A (en) * | 1991-12-30 | 1993-05-11 | The Great American Company | Liquid level measuring system |
| US5434555A (en) * | 1993-05-17 | 1995-07-18 | Magnetrol International, Inc. | Thermal dispersion switch with self test circuit |
| JPH07199636A (ja) * | 1993-12-28 | 1995-08-04 | Fujitsu Ltd | トナーの残量検出装置 |
| US6422088B1 (en) * | 1999-09-24 | 2002-07-23 | Denso Corporation | Sensor failure or abnormality detecting system incorporated in a physical or dynamic quantity detecting apparatus |
| US6767141B1 (en) * | 2000-12-04 | 2004-07-27 | Optical Communication Products, Inc. | Optical interface unit |
| CN108107929B (zh) * | 2018-02-06 | 2023-11-10 | 欣灵电气股份有限公司 | 液位控制器 |
| CN112325978B (zh) * | 2020-10-28 | 2024-04-12 | 苏州贝康智能制造有限公司 | 一种电阻式液位检测系统 |
| CN116125900B (zh) * | 2021-11-15 | 2025-07-11 | 宝山钢铁股份有限公司 | 利用plc热电阻输入模块同时测温度和开关量信号方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE613746C (de) * | 1929-01-17 | 1935-05-24 | Arthur Snow | Dekadenwiderstand fuer Wheatstonesche Bruecken, insbesondere fuer elektrische Temperaturmessung mit Widerstandsthermometern |
| DE2256197C2 (de) * | 1972-11-16 | 1974-03-07 | Danfoss A/S, Nordborg (Daenemark) | Meßwertumformer mit einem Kompensationsbrückenkreis |
| US3922658A (en) * | 1974-12-04 | 1975-11-25 | Bendix Corp | Fluid level monitor |
-
1975
- 1975-03-10 DE DE2510356A patent/DE2510356C2/de not_active Expired
- 1975-12-30 SU SU752303259A patent/SU625636A3/ru active
-
1976
- 1976-01-13 ZA ZA00760169A patent/ZA76169B/xx unknown
- 1976-01-14 IN IN84/CAL/76A patent/IN142779B/en unknown
- 1976-02-18 BR BR7601006A patent/BR7601006A/pt unknown
- 1976-02-26 US US05/661,428 patent/US4053874A/en not_active Expired - Lifetime
- 1976-02-27 SE SE7602752A patent/SE411956B/xx not_active IP Right Cessation
- 1976-03-04 IT IT20831/76A patent/IT1056854B/it active
- 1976-03-04 CA CA247,079A patent/CA1053772A/en not_active Expired
- 1976-03-08 BE BE164949A patent/BE839312A/xx not_active IP Right Cessation
- 1976-03-09 JP JP51025518A patent/JPS6018924B2/ja not_active Expired
- 1976-03-09 CH CH288476A patent/CH591683A5/xx not_active IP Right Cessation
- 1976-03-09 FR FR7606693A patent/FR2304063A1/fr active Granted
- 1976-03-10 GB GB9631/76A patent/GB1536894A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2304063B1 (enEXAMPLES) | 1980-12-05 |
| FR2304063A1 (fr) | 1976-10-08 |
| IN142779B (enEXAMPLES) | 1977-08-27 |
| US4053874A (en) | 1977-10-11 |
| BE839312A (fr) | 1976-07-01 |
| CH591683A5 (enEXAMPLES) | 1977-09-30 |
| JPS51113758A (en) | 1976-10-07 |
| GB1536894A (en) | 1978-12-29 |
| SE7602752L (sv) | 1976-09-13 |
| DE2510356A1 (de) | 1976-09-16 |
| ZA76169B (en) | 1976-12-29 |
| JPS6018924B2 (ja) | 1985-05-13 |
| IT1056854B (it) | 1982-02-20 |
| SU625636A3 (ru) | 1978-09-25 |
| DE2510356C2 (de) | 1984-03-15 |
| BR7601006A (pt) | 1976-09-14 |
| SE411956B (sv) | 1980-02-11 |
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