GB1099148A - Oil mist detection method and apparatus - Google Patents

Oil mist detection method and apparatus

Info

Publication number
GB1099148A
GB1099148A GB17756/66A GB1775666A GB1099148A GB 1099148 A GB1099148 A GB 1099148A GB 17756/66 A GB17756/66 A GB 17756/66A GB 1775666 A GB1775666 A GB 1775666A GB 1099148 A GB1099148 A GB 1099148A
Authority
GB
United Kingdom
Prior art keywords
oil mist
light
stream
resistor
photo
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
Application number
GB17756/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stewart Warner Corp
Original Assignee
Stewart Warner Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stewart Warner Corp filed Critical Stewart Warner Corp
Publication of GB1099148A publication Critical patent/GB1099148A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,099,148. Photo-electric oil mist detectors. STEWART-WARNER CORPORATION. April 22, 1966 [April 22, 1965], No. 17756/66. Heading G1A. Apparatus for detecting a variation in the particle density of an air stream carrying particles comprises a casing having an inlet and an outlet for the stream, a lamp and a light receiving device situated between the inlet and the outlet along the longitudinal axis of the stream path, the device providing a signal proportional to the light intensity received by the device. Light from a filament lamp 28, Fig. 2, backed by curved reflector 39 is projected downstream along the axis of an oil mist-carrying duct 10. Light penetrating the mist enters a cylindrical light-guide 40 by a plane face 42 and is reflected by a silvered inclined face 43 along the axis of the guide 40 to a double photo-resistor 60. The two sections 80, 82, Fig. 3, of the photoresistor are connected to unijunction transistor oscillators U1, U2 to prevent the same oscillating when the oil mist density is below or above a preset level respectively. So long as oscillators U1 and U2 oscillate, the pulses they produce repeatedly fire A. C. energized SCR1 and SCR2 to keep the relays 88 and 90 energized, but when one stops oscillating, the corresponding relay drops to energize a corresponding alarm A1, A2. The apparatus is calibrated by changing over switch SW1, thus connecting a calibrated resistor R13 to the photo-resistor 80. The light-source intensity is then adjusted with the desired density of oil mist flowing until the oscillator U1 just fails to oscillate. Oil mist is allowed to condense on and drip off the elements of the apparatus in the stream for sufficiently long for a steady state to be reached before calibration.
GB17756/66A 1965-04-22 1966-04-22 Oil mist detection method and apparatus Expired GB1099148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US450155A US3417250A (en) 1965-04-22 1965-04-22 Oil mist particle density detection method and apparatus utilizing a stable oil coating and a unijunction oscillator circuit

Publications (1)

Publication Number Publication Date
GB1099148A true GB1099148A (en) 1968-01-17

Family

ID=23786993

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17756/66A Expired GB1099148A (en) 1965-04-22 1966-04-22 Oil mist detection method and apparatus

Country Status (5)

Country Link
US (1) US3417250A (en)
JP (1) JPS5126832B1 (en)
BE (1) BE699266A (en)
DE (1) DE1524682A1 (en)
GB (1) GB1099148A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109904033A (en) * 2017-11-29 2019-06-18 上海乐研电气有限公司 A kind of method that gas density relay superpressure signal realizes holding

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809913A (en) * 1972-10-20 1974-05-07 Steel Corp Detector for particulate matter in flowing gas streams
FR2208527A6 (en) * 1972-11-24 1974-06-21 Perieres Jacques
DE3503626A1 (en) * 1985-02-02 1986-08-07 Otto Tuchenhagen GmbH & Co KG, 2059 Büchen Optical probe device for photometric analysis of fluids flowing in lines
US4687327A (en) * 1985-02-25 1987-08-18 The Dow Chemical Company Oil mist monitor
JPH0289366U (en) * 1988-12-27 1990-07-16
US6091484A (en) * 1997-05-23 2000-07-18 Col-Ven S.A. Oil quantity and quality indicator
US20080297766A1 (en) * 2007-05-31 2008-12-04 Caterpillar Inc. System and method for measuring fluid aeration
CN111157858B (en) * 2020-01-07 2022-01-25 岭东核电有限公司 Method for detecting metal particles in transformer of nuclear power station

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324304A (en) * 1939-08-24 1943-07-13 Katzman Jacob Turbidity meter
US2580500A (en) * 1949-04-25 1952-01-01 Albert Paul Mch Device for determining turbidity within a body of liquid
US2591737A (en) * 1950-11-28 1952-04-08 Nat Lead Co Detection of oil in mud-laden well drilling fluids
US2862416A (en) * 1954-06-09 1958-12-02 Gen Electric Light intensity measuring device including semiconductor translating circuit
US3206612A (en) * 1960-08-18 1965-09-14 James E Swanekamp Signal time comparison circuit utilizing ujt characteristics
US3268734A (en) * 1963-09-30 1966-08-23 Stewart Warner Corp Oil mist fluid monitor
US3308300A (en) * 1963-09-30 1967-03-07 Stewart Warner Corp Photodetection fluid monitor including alarm circuit with fail-safe means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109904033A (en) * 2017-11-29 2019-06-18 上海乐研电气有限公司 A kind of method that gas density relay superpressure signal realizes holding
CN109904033B (en) * 2017-11-29 2021-02-09 上海乐研电气有限公司 Method for realizing holding of overpressure signal of gas density relay

Also Published As

Publication number Publication date
DE1524682A1 (en) 1969-08-28
US3417250A (en) 1968-12-17
BE699266A (en) 1967-11-03
JPS5126832B1 (en) 1976-08-09

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