JPH0338530B2 - - Google Patents
Info
- Publication number
- JPH0338530B2 JPH0338530B2 JP55034854A JP3485480A JPH0338530B2 JP H0338530 B2 JPH0338530 B2 JP H0338530B2 JP 55034854 A JP55034854 A JP 55034854A JP 3485480 A JP3485480 A JP 3485480A JP H0338530 B2 JPH0338530 B2 JP H0338530B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- voltage
- impedance
- probe
- switch
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims description 35
- 238000012360 testing method Methods 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 14
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims 1
- 238000011076 safety test Methods 0.000 claims 1
- 239000000523 sample Substances 0.000 description 54
- 239000004020 conductor Substances 0.000 description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- 239000003990 capacitor Substances 0.000 description 21
- 230000005669 field effect Effects 0.000 description 20
- 238000004804 winding Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009781 safety test method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2829—Testing of circuits in sensor or actuator systems
-
- 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
- G01F23/241—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 for discrete levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7306—Electrical characteristic sensing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/022,581 US4224606A (en) | 1979-03-21 | 1979-03-21 | Fluid level detector test switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55128122A JPS55128122A (en) | 1980-10-03 |
| JPH0338530B2 true JPH0338530B2 (US07655688-20100202-C00109.png) | 1991-06-11 |
Family
ID=21810322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3485480A Granted JPS55128122A (en) | 1979-03-21 | 1980-03-21 | Controller for liquid level detector |
Country Status (5)
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322847A (en) * | 1980-03-10 | 1982-03-30 | International Business Machines Corporation | Automatic indirect testing to verify operational control |
| US4356406A (en) * | 1981-02-17 | 1982-10-26 | Honeywell Inc. | Conductive fluid probe powering means |
| DE3148383C2 (de) * | 1981-12-07 | 1989-11-23 | Adam Opel AG, 6090 Rüsselsheim | Vorrichtung zur Messung der Flüssigkeitsfüllmenge in einem Behälter |
| FR2531543A1 (fr) * | 1982-08-05 | 1984-02-10 | Commissariat Energie Atomique | Dispositif de securite et de detection d'un liquide conducteur dans une enceinte a surveiller |
| AT383677B (de) * | 1983-10-07 | 1987-08-10 | Kessel Loos Kg Bischofshofen | Pruefeinrichtung zur ueberpruefung einer fluessigkeitsmangelsicherung |
| US4565930A (en) * | 1984-06-01 | 1986-01-21 | Honeywell, Inc. | Boiler low water sensing system utilizing energy transfer network means for delay |
| JPH0355104Y2 (US07655688-20100202-C00109.png) * | 1986-07-31 | 1991-12-06 | ||
| US5239203A (en) * | 1990-03-30 | 1993-08-24 | Texand Corporation | Common ground control switch for an irrigation system |
| US5196729A (en) * | 1990-03-30 | 1993-03-23 | Thorngren John T | Liquid activated control switch |
| US5438323A (en) * | 1993-06-14 | 1995-08-01 | Scully Signal Company | Fail safe fluid level detection circuit |
| US5446444A (en) * | 1993-12-17 | 1995-08-29 | Robertshaw Controls Company | Capacitive threshold detector test circuit |
| US5874895A (en) * | 1996-11-15 | 1999-02-23 | International Business Machines Corporation | Method and apparatus for testing operation of a sensor controlled device |
| US5838241A (en) * | 1996-12-18 | 1998-11-17 | Robertshaw Controls Company | Liquid level transmitter |
| US6046392A (en) * | 1997-05-28 | 2000-04-04 | Saul; Victor D. | Stringed musical instrument frame having interchangeable soundboard and neck assembly |
| GB9915254D0 (en) * | 1999-07-01 | 1999-09-01 | Smiths Industries Plc | Fluid-gauging systems and methods |
| US6688329B2 (en) * | 2001-07-06 | 2004-02-10 | C. Cowles & Company | Water feeder controller for boiler |
| US6650128B2 (en) | 2002-02-19 | 2003-11-18 | Tyco Flow Control | Method and apparatus for circuit fault detection with boiler water level detection system |
| TW200827643A (en) * | 2006-12-20 | 2008-07-01 | Zippy Tech Corp | Water-flow control apparatus for ice-making machine |
| CH702180B1 (de) * | 2009-11-02 | 2015-02-13 | Tecan Trading Ag | Verfahren zum Testen eines Laborgeräts und entsprechendes Laborgerät. |
| CN109798951B (zh) * | 2017-11-17 | 2020-10-20 | 厦门雅迅网络股份有限公司 | 一种车载油位检测的自矫正电路及方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3593270A (en) * | 1967-07-10 | 1971-07-13 | Richard E Walker | Liquid level sensing and indicating system |
| US3683347A (en) * | 1970-01-12 | 1972-08-08 | Illinois Tool Works | Remote sensing indicator |
| US3834357A (en) * | 1973-06-07 | 1974-09-10 | Itt | Low-water cut off system |
| DE2510356C2 (de) * | 1975-03-10 | 1984-03-15 | Siemens AG, 1000 Berlin und 8000 München | Einrichtung zur Überwachung des Flüssigkeitsstandes in einem Behälter |
| US4007713A (en) * | 1975-08-28 | 1977-02-15 | Hydrolevel Corporation | Test circuit |
| US4027172A (en) * | 1975-10-02 | 1977-05-31 | Honeywell Inc. | Resistive fluid detecting means |
-
1979
- 1979-03-21 US US06/022,581 patent/US4224606A/en not_active Expired - Lifetime
-
1980
- 1980-03-07 CA CA347,238A patent/CA1111124A/en not_active Expired
- 1980-03-13 GB GB8008568A patent/GB2045933B/en not_active Expired
- 1980-03-20 DE DE3010721A patent/DE3010721C2/de not_active Expired
- 1980-03-21 JP JP3485480A patent/JPS55128122A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| GB2045933A (en) | 1980-11-05 |
| US4224606A (en) | 1980-09-23 |
| DE3010721A1 (de) | 1980-10-02 |
| JPS55128122A (en) | 1980-10-03 |
| GB2045933B (en) | 1983-04-20 |
| DE3010721C2 (de) | 1986-06-05 |
| CA1111124A (en) | 1981-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0338530B2 (US07655688-20100202-C00109.png) | ||
| CA1072655A (en) | Resistive fluid detecting means | |
| US4019067A (en) | Conductive probe level control | |
| US3468164A (en) | Open thermocouple detection apparatus | |
| US4259982A (en) | Resistive fluid detecting means | |
| US4080640A (en) | People-protecting ground fault circuit interrupter | |
| US4565930A (en) | Boiler low water sensing system utilizing energy transfer network means for delay | |
| US3569826A (en) | Ground fault detector apparatus including a pair of complementarily connected bridge detector means for isolated electrical power systems | |
| US3253188A (en) | Control circuit | |
| JPS6020654B2 (ja) | ガス点火制御装置 | |
| US2721297A (en) | Conductivity measuring system | |
| EP0050953B1 (en) | Flame detection circuit | |
| US3889183A (en) | Conductivity measuring circuit | |
| US3769577A (en) | Electronic leakage resistance detector for an ac control circuit | |
| US3617809A (en) | Electronic safety system | |
| US3175206A (en) | Fire detector with integrity-testing device | |
| US3831083A (en) | Conductivity and specific resistance measuring system | |
| US3611340A (en) | Series circuit monitoring structure | |
| US3012146A (en) | Condition sensing apparatus | |
| US3961224A (en) | Transient-free isolation monitor | |
| EP0202767B1 (en) | Symmetrical fault current detector | |
| GB2082752A (en) | Burner Igniter/Detector | |
| US3405357A (en) | Continuity test bridge circuit with silicon-controlled rectifier indicator means | |
| US2459186A (en) | Testing and protection of electrical distribution systems | |
| JPS63318421A (ja) | 炎電流監視装置 |