JPS57189043A - Detector for oxygen deficiency state - Google Patents

Detector for oxygen deficiency state

Info

Publication number
JPS57189043A
JPS57189043A JP7386881A JP7386881A JPS57189043A JP S57189043 A JPS57189043 A JP S57189043A JP 7386881 A JP7386881 A JP 7386881A JP 7386881 A JP7386881 A JP 7386881A JP S57189043 A JPS57189043 A JP S57189043A
Authority
JP
Japan
Prior art keywords
oxygen
concn
detected
current ratios
outputs
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.)
Granted
Application number
JP7386881A
Other languages
Japanese (ja)
Other versions
JPH0215815B2 (en
Inventor
Nobutoshi Gako
Yasukuni Yamane
Chuji Suzuki
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP7386881A priority Critical patent/JPS57189043A/en
Publication of JPS57189043A publication Critical patent/JPS57189043A/en
Publication of JPH0215815B2 publication Critical patent/JPH0215815B2/ja
Granted 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
    • G01N21/72—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using flame burners

Landscapes

  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physics & Mathematics (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)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

PURPOSE:To detect <=19% oxygen deficiency states accurately by providing plural pieces of photodetectors of different wavelength sensitivities, and detecting oxygen concns. from the relative values among the outputs of the respective elements. CONSTITUTION:A burner body 1 is provided with an oil tank and a carburettor communicated with this converts liquid kerosene to an evaporating gas. This evaporating gas is burned by a Bunsen type burner. The change in the wavelength of the combustion flame is detected by using a semiconductor color sensor 24. If the relations between the concn. of oxygen and the short-circuiting electric current ratios for colors of different combustion flames are investigated by experiment, it is revealed that until the concn. of oxygen attains 19%, the short-circuiting current ratios are roughly constant and at the concn. of oxygen below this, the current ratios decreased sharply. The two wavelengths detected with the sensor 24 are obtained as a ratio between the outputs of two photodiodes, from which it is detected by a comparator 28 that the oxygen is decreased to <=19%.
JP7386881A 1981-05-15 1981-05-15 Detector for oxygen deficiency state Granted JPS57189043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7386881A JPS57189043A (en) 1981-05-15 1981-05-15 Detector for oxygen deficiency state

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7386881A JPS57189043A (en) 1981-05-15 1981-05-15 Detector for oxygen deficiency state

Publications (2)

Publication Number Publication Date
JPS57189043A true JPS57189043A (en) 1982-11-20
JPH0215815B2 JPH0215815B2 (en) 1990-04-13

Family

ID=13530587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7386881A Granted JPS57189043A (en) 1981-05-15 1981-05-15 Detector for oxygen deficiency state

Country Status (1)

Country Link
JP (1) JPS57189043A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59170751U (en) * 1983-04-30 1984-11-15 シャープ株式会社 Incomplete combustion detection circuit
JPS59221520A (en) * 1983-05-31 1984-12-13 Sharp Corp Incomplete combustion sensing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5209612A (en) * 1992-03-27 1993-05-11 The Budd Company Cutting tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59170751U (en) * 1983-04-30 1984-11-15 シャープ株式会社 Incomplete combustion detection circuit
JPS59221520A (en) * 1983-05-31 1984-12-13 Sharp Corp Incomplete combustion sensing device
JPH0220895B2 (en) * 1983-05-31 1990-05-11 Sharp Kk

Also Published As

Publication number Publication date
JPH0215815B2 (en) 1990-04-13

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