JPS57153251A - Detection apparatus - Google Patents

Detection apparatus

Info

Publication number
JPS57153251A
JPS57153251A JP56039037A JP3903781A JPS57153251A JP S57153251 A JPS57153251 A JP S57153251A JP 56039037 A JP56039037 A JP 56039037A JP 3903781 A JP3903781 A JP 3903781A JP S57153251 A JPS57153251 A JP S57153251A
Authority
JP
Japan
Prior art keywords
level
discrimination
output
line
oxygen concentration
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
JP56039037A
Other languages
Japanese (ja)
Other versions
JPH0233977B2 (en
Inventor
Susumu Takagi
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.)
Denso Ten Ltd
Original Assignee
Denso Ten Ltd
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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP56039037A priority Critical patent/JPS57153251A/en
Publication of JPS57153251A publication Critical patent/JPS57153251A/en
Publication of JPH0233977B2 publication Critical patent/JPH0233977B2/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
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/4065—Circuit arrangements specially adapted therefor

Abstract

PURPOSE:To improve the response velocity, by discriminating an output at an early stage of increasing or decreasing time of oxygen concentration by a mutually different discrimination level, at the time of discriminating the output from an oxygen concentration detection element at the discrimination level. CONSTITUTION:An output from an oxygen concentration detection circuit 14 is given to a differential amplifier circuit 15 from a terminal 26 and a signal in proportion to a voltage difference of input terminals 15a, 15b is given to a line 17. The signal level of the line 17 is increased proportionally until it reaches the first discrimination level of the first level discrimination circuit 18 and when it reaches the second discrimination level of the second level discrimination circuit 21, a high level output is generated on an output terminal 21c. When the signal level of the terminal 26 is increased moreover, a capacitor C1 of an integral circuit 16 is charged and the output of the line 17 is kept at the first discrimination level. When the signal level of the line 17 reaches the second discrimination level by decreasing the oxygen concentration, a transistor 30 is conducted because an output terminal 25 becomes a high level and the capacitor C1 is discharged and then, the signal level of the line 17 is made zero.
JP56039037A 1981-03-17 1981-03-17 Detection apparatus Granted JPS57153251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56039037A JPS57153251A (en) 1981-03-17 1981-03-17 Detection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56039037A JPS57153251A (en) 1981-03-17 1981-03-17 Detection apparatus

Publications (2)

Publication Number Publication Date
JPS57153251A true JPS57153251A (en) 1982-09-21
JPH0233977B2 JPH0233977B2 (en) 1990-07-31

Family

ID=12541911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56039037A Granted JPS57153251A (en) 1981-03-17 1981-03-17 Detection apparatus

Country Status (1)

Country Link
JP (1) JPS57153251A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142601A (en) * 1983-02-03 1984-08-15 Fujitsu Ten Ltd Level discrimination processing system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621046A (en) * 1979-07-31 1981-02-27 Fujitsu Ten Ltd Detector circuit for theoretical air fuel retio using titania-type o2 sensor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621046A (en) * 1979-07-31 1981-02-27 Fujitsu Ten Ltd Detector circuit for theoretical air fuel retio using titania-type o2 sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59142601A (en) * 1983-02-03 1984-08-15 Fujitsu Ten Ltd Level discrimination processing system

Also Published As

Publication number Publication date
JPH0233977B2 (en) 1990-07-31

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