JPS5621022A - Diagnosis and control system for light detection circuit - Google Patents

Diagnosis and control system for light detection circuit

Info

Publication number
JPS5621022A
JPS5621022A JP9648979A JP9648979A JPS5621022A JP S5621022 A JPS5621022 A JP S5621022A JP 9648979 A JP9648979 A JP 9648979A JP 9648979 A JP9648979 A JP 9648979A JP S5621022 A JPS5621022 A JP S5621022A
Authority
JP
Japan
Prior art keywords
resistor
diode
light detection
detection circuit
diagnosis
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
JP9648979A
Other languages
Japanese (ja)
Other versions
JPS5952970B2 (en
Inventor
Eiji Okamura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9648979A priority Critical patent/JPS5952970B2/en
Publication of JPS5621022A publication Critical patent/JPS5621022A/en
Publication of JPS5952970B2 publication Critical patent/JPS5952970B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver

Abstract

PURPOSE:To simply check a marker detection state, by stopping a web while detecting a marker and by altering the light detection threshold value of a light detection circuit to diagnose and control the detection state and indicate it and thereafter setting the original threshold value again. CONSTITUTION:The positive input terminal of a comparator 15 is connected to a power voltage +5V through a series circuit comprising a diode D1 and a resistor R5 and another series circuit comprising a diode D2and a resistor R6. Test signals 1, 2 are applied to the connection node between the diode D1 and the resistor R5 and that between the diode D2 and the resistor R6 through TTL open colector inverter 21, 22.
JP9648979A 1979-07-28 1979-07-28 light detection circuit Expired JPS5952970B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9648979A JPS5952970B2 (en) 1979-07-28 1979-07-28 light detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9648979A JPS5952970B2 (en) 1979-07-28 1979-07-28 light detection circuit

Publications (2)

Publication Number Publication Date
JPS5621022A true JPS5621022A (en) 1981-02-27
JPS5952970B2 JPS5952970B2 (en) 1984-12-22

Family

ID=14166480

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9648979A Expired JPS5952970B2 (en) 1979-07-28 1979-07-28 light detection circuit

Country Status (1)

Country Link
JP (1) JPS5952970B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167558U (en) * 1984-04-13 1985-11-07 アイシン精機株式会社 Vertically movable headrest device
CN114144564B (en) * 2019-08-09 2023-02-03 世嘉智尼工业株式会社 Sliding door device

Also Published As

Publication number Publication date
JPS5952970B2 (en) 1984-12-22

Similar Documents

Publication Publication Date Title
SE8105637L (en) SIGNALVAGSSTYRKRETS
JPS484924A (en)
DE68924322T2 (en) Circuit for electromagnetic rotation sensor.
IE823102L (en) Test circuit
CH625932B (en) INTEGRATED CIRCUIT SUITABLE TO REACT TO THE PRESENCE AND NATURE OF AN EXTERNAL RECEIVER CIRCUIT.
JPS5621022A (en) Diagnosis and control system for light detection circuit
ATE26181T1 (en) LEAK DETECTOR.
JPS53132934A (en) Detector for abnormal state of data transmitter
JPS5778218A (en) Discrimination system
JPS57177271A (en) Element malfunction diagnosing device for thyristor converter
JPS5621405A (en) Clamp circuit
JPS5523638A (en) Failure detection unit for transmission control unit
SU458033A1 (en) Device for monitoring the characteristics of a magnetic recorder
JPS54103976A (en) Logical circuit diagnoser
KR890004800Y1 (en) Error movement cheek circuits of micom
JPS53144240A (en) Signal detection circuit
SU1401392A1 (en) Power source condition indicator
SU482782A1 (en) Output device for functional control systems
RU2034334C1 (en) Emergency alarm
SU1029101A1 (en) Device for checking ac mains insulation
SU1193593A1 (en) Voltage indicator
SU1434375A1 (en) Device for monitoring contact-making
SU580526A1 (en) Probe for checking electronic logic elements
JPS56101158A (en) Power supply device of copying machine
BE902855A (en) AUTOMATIC TEST EQUIPMENT