WO1999067603A1 - Apparatus and method for detecting the level of a liquid - Google Patents
Apparatus and method for detecting the level of a liquid Download PDFInfo
- Publication number
- WO1999067603A1 WO1999067603A1 PCT/GB1999/001476 GB9901476W WO9967603A1 WO 1999067603 A1 WO1999067603 A1 WO 1999067603A1 GB 9901476 W GB9901476 W GB 9901476W WO 9967603 A1 WO9967603 A1 WO 9967603A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- liquid
- detector
- conducting element
- meniscus
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims description 8
- 230000005499 meniscus Effects 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000003921 oil Substances 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
- G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002335531A CA2335531A1 (en) | 1998-06-22 | 1999-05-11 | Apparatus and method for detecting the level of a liquid |
EP99921011A EP1101081A1 (en) | 1998-06-22 | 1999-05-11 | Apparatus and method for detecting the level of a liquid |
AU38386/99A AU3838699A (en) | 1998-06-22 | 1999-05-11 | Apparatus and method for detecting the level of a liquid |
BR9911425-9A BR9911425A (en) | 1998-06-22 | 1999-05-11 | Apparatus and method for detecting the level of a liquid |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9813429.9A GB9813429D0 (en) | 1998-06-22 | 1998-06-22 | Apparatus and method for detecting the level of a liquid |
GB9813429.9 | 1998-06-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999067603A1 true WO1999067603A1 (en) | 1999-12-29 |
Family
ID=10834168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1999/001476 WO1999067603A1 (en) | 1998-06-22 | 1999-05-11 | Apparatus and method for detecting the level of a liquid |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1101081A1 (en) |
AU (1) | AU3838699A (en) |
BR (1) | BR9911425A (en) |
CA (1) | CA2335531A1 (en) |
GB (1) | GB9813429D0 (en) |
WO (1) | WO1999067603A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007049005A1 (en) * | 2005-10-26 | 2007-05-03 | Trw Limited | Optical fluid level detector |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4440022A (en) * | 1981-10-14 | 1984-04-03 | Smiths Industries Public Limited Company | Liquid-level detection |
DE3416206A1 (en) * | 1983-05-04 | 1984-11-08 | Basf Ag, 6700 Ludwigshafen | Measurement method and measurement circuit for determining the liquid level in a transparent level-indicating tube |
EP0185285A2 (en) * | 1984-12-18 | 1986-06-25 | Abbott Laboratories | Liquid level measurement apparatus |
US5274245A (en) * | 1992-11-06 | 1993-12-28 | Lee Thomas E | Optical liquid level detector using dual varying light emitters |
EP0779156A1 (en) * | 1995-12-14 | 1997-06-18 | Xerox Corporation | Sensing system for detecting presence of an ink container and level of ink therein |
-
1998
- 1998-06-22 GB GBGB9813429.9A patent/GB9813429D0/en not_active Ceased
-
1999
- 1999-05-11 WO PCT/GB1999/001476 patent/WO1999067603A1/en not_active Application Discontinuation
- 1999-05-11 EP EP99921011A patent/EP1101081A1/en not_active Withdrawn
- 1999-05-11 AU AU38386/99A patent/AU3838699A/en not_active Abandoned
- 1999-05-11 BR BR9911425-9A patent/BR9911425A/en not_active Application Discontinuation
- 1999-05-11 CA CA002335531A patent/CA2335531A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4440022A (en) * | 1981-10-14 | 1984-04-03 | Smiths Industries Public Limited Company | Liquid-level detection |
DE3416206A1 (en) * | 1983-05-04 | 1984-11-08 | Basf Ag, 6700 Ludwigshafen | Measurement method and measurement circuit for determining the liquid level in a transparent level-indicating tube |
EP0185285A2 (en) * | 1984-12-18 | 1986-06-25 | Abbott Laboratories | Liquid level measurement apparatus |
US5274245A (en) * | 1992-11-06 | 1993-12-28 | Lee Thomas E | Optical liquid level detector using dual varying light emitters |
EP0779156A1 (en) * | 1995-12-14 | 1997-06-18 | Xerox Corporation | Sensing system for detecting presence of an ink container and level of ink therein |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007049005A1 (en) * | 2005-10-26 | 2007-05-03 | Trw Limited | Optical fluid level detector |
Also Published As
Publication number | Publication date |
---|---|
CA2335531A1 (en) | 1999-12-29 |
GB9813429D0 (en) | 1998-08-19 |
BR9911425A (en) | 2001-03-20 |
EP1101081A1 (en) | 2001-05-23 |
AU3838699A (en) | 2000-01-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4994682A (en) | Fiber optic continuous liquid level sensor | |
US5999256A (en) | Particle measurement system | |
EP2499480B1 (en) | Optical sensor system based on attenuated total reflection | |
US6172377B1 (en) | Fluorescent optical liquid level sensor | |
US20090153846A1 (en) | Fluid level indicator | |
ATE181423T1 (en) | OPTICAL INTERFACE | |
EP1941248A1 (en) | Optical fluid level detector | |
ES8500445A1 (en) | Optical detection of radial reflective defects | |
EP0334533B1 (en) | Fibre optic discrete or continuous liquid level sensor | |
US6005242A (en) | Environmental media and pressure sensor | |
JP5184264B2 (en) | Leak sensor | |
US6795598B1 (en) | Liquid-level sensor having multiple solid optical conductors with surface discontinuities | |
WO1999067603A1 (en) | Apparatus and method for detecting the level of a liquid | |
US20040047585A1 (en) | Light transfer device and system | |
MXPA00012484A (en) | Apparatus and method for detecting the level of a liquid | |
WO2001073409A1 (en) | Inclusion detection | |
US4494869A (en) | Apparatus and method for photometric measurement of oil present on human skin | |
EP1058099A2 (en) | Fluid detector | |
CN214040243U (en) | Optical fiber liquid level sensor | |
JPH03289504A (en) | Bubble measuring apparatus | |
JPH03115844A (en) | Detection of surface defect | |
CN112325984A (en) | Optical fiber liquid level sensor | |
NL9002211A (en) | POSITION SENSITIVE RADIATION DETECTION SYSTEM AND OPTICAL SCANNING DEVICE THEREOF. | |
US6628884B2 (en) | Digital film processing system using a light transfer device | |
JP2992943B2 (en) | Small tilt angle detector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 09719510 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: PA/a/2000/012484 Country of ref document: MX |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1999921011 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2335531 Country of ref document: CA |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWP | Wipo information: published in national office |
Ref document number: 1999921011 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1999921011 Country of ref document: EP |