JPS5735734A - Transmission light measuring device - Google Patents

Transmission light measuring device

Info

Publication number
JPS5735734A
JPS5735734A JP11239680A JP11239680A JPS5735734A JP S5735734 A JPS5735734 A JP S5735734A JP 11239680 A JP11239680 A JP 11239680A JP 11239680 A JP11239680 A JP 11239680A JP S5735734 A JPS5735734 A JP S5735734A
Authority
JP
Japan
Prior art keywords
signal
record
medium
output
photodetecting element
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
JP11239680A
Other languages
Japanese (ja)
Other versions
JPS6223816B2 (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
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11239680A priority Critical patent/JPS5735734A/en
Publication of JPS5735734A publication Critical patent/JPS5735734A/en
Publication of JPS6223816B2 publication Critical patent/JPS6223816B2/ja
Granted 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
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers

Abstract

PURPOSE:To exactly detect a kind and quantity of a medium, by storing an output in case a medium of a transmission photodetecting element part has no record, and an output before a record appears, while there is a record, and changing it over when it is used. CONSTITUTION:A medium 2 is irradiated by a light source 11 and is photoelectrically converted by a reflection photodetecting element 12. The light source 1 irradiates a transmission photodetecting element 3 through the medium 2. An output of the reflection photodetecting element 12 is delayed by the time alpha when the medium 2 moves between the fields of view of both the photodetecting elements 12, 3, by a delaying circuit 16 through a printing discriminating circuit 15. When the reflection photodetecting element 12 detects a record, a signal 113 becomes small, a signal 144 becomes ''1'', and a signal 115 is delayed by the time alpha. A sampling circuit 19 makes an output 102 of an amplifier 4 an output signal 116 as it is, when the signal 115 is ''0'' (there is no record in the signal 113), and stores the signal 102 in that case and makes it the output signal 116, when the signal 115 becomes ''1''. In this way, the output signal exactly detects a kind and quantity of a medium, irrespective of whether there is a record or not.
JP11239680A 1980-08-14 1980-08-14 Transmission light measuring device Granted JPS5735734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11239680A JPS5735734A (en) 1980-08-14 1980-08-14 Transmission light measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11239680A JPS5735734A (en) 1980-08-14 1980-08-14 Transmission light measuring device

Publications (2)

Publication Number Publication Date
JPS5735734A true JPS5735734A (en) 1982-02-26
JPS6223816B2 JPS6223816B2 (en) 1987-05-25

Family

ID=14585606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11239680A Granted JPS5735734A (en) 1980-08-14 1980-08-14 Transmission light measuring device

Country Status (1)

Country Link
JP (1) JPS5735734A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04106307U (en) * 1990-12-27 1992-09-14 道廣 菅 traffic safety clothing

Also Published As

Publication number Publication date
JPS6223816B2 (en) 1987-05-25

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