JPS61275623A - Check circuit for optical detection part - Google Patents

Check circuit for optical detection part

Info

Publication number
JPS61275623A
JPS61275623A JP60117874A JP11787485A JPS61275623A JP S61275623 A JPS61275623 A JP S61275623A JP 60117874 A JP60117874 A JP 60117874A JP 11787485 A JP11787485 A JP 11787485A JP S61275623 A JPS61275623 A JP S61275623A
Authority
JP
Japan
Prior art keywords
sense
output
carry signal
storing
check circuit
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
JP60117874A
Other languages
Japanese (ja)
Other versions
JPH0362233B2 (en
Inventor
Ichiro Urano
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP60117874A priority Critical patent/JPH0362233B2/ja
Publication of JPS61275623A publication Critical patent/JPS61275623A/en
Publication of JPH0362233B2 publication Critical patent/JPH0362233B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To detect whether there is a body or not accurately by varying the quantity of light at the light emission side of an optical detection system, bit by bit, and storing the sense level of a sensor, and further storing the permissible range of the sense level previously.
CONSTITUTION: A detection part check circuit checks and stores the sense levels of sensors 9 and 10 in the starting section (A) from power-on or resetting operation to the output of the 1st carry signal 110 from a counter 3, and detects whether there is a body between LEDs 7 and 8 and sensors 9 and 10 or not on the basis of an optimum slice level calculated previously corresponding to the sense levels stored in the 1st section from the output of the 2nd or succeeding carry signal 110 from the counter 3 to the output of the next carry signal 110, thereby outputting '1' as detection signals 118 and 119 when there is the body or '0' when not. Further, a resetting indication is generated by a microprocessor, etc., when necessary to detect accurately whether there is the body or not by re-storing sense levels even if the sense levels vary.
COPYRIGHT: (C)1986,JPO&Japio
JP60117874A 1985-05-31 1985-05-31 Expired - Lifetime JPH0362233B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60117874A JPH0362233B2 (en) 1985-05-31 1985-05-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60117874A JPH0362233B2 (en) 1985-05-31 1985-05-31

Publications (2)

Publication Number Publication Date
JPS61275623A true JPS61275623A (en) 1986-12-05
JPH0362233B2 JPH0362233B2 (en) 1991-09-25

Family

ID=14722398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60117874A Expired - Lifetime JPH0362233B2 (en) 1985-05-31 1985-05-31

Country Status (1)

Country Link
JP (1) JPH0362233B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04126132U (en) * 1991-05-09 1992-11-17
US9338319B2 (en) * 2008-12-17 2016-05-10 Canon Kabushiki Kaisha Image processing apparatus having plurality of power modes and method of controlling the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04126132U (en) * 1991-05-09 1992-11-17
US9338319B2 (en) * 2008-12-17 2016-05-10 Canon Kabushiki Kaisha Image processing apparatus having plurality of power modes and method of controlling the same

Also Published As

Publication number Publication date
JPH0362233B2 (en) 1991-09-25

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term