JPS6115581U - Paper detection device - Google Patents
Paper detection deviceInfo
- Publication number
- JPS6115581U JPS6115581U JP10022784U JP10022784U JPS6115581U JP S6115581 U JPS6115581 U JP S6115581U JP 10022784 U JP10022784 U JP 10022784U JP 10022784 U JP10022784 U JP 10022784U JP S6115581 U JPS6115581 U JP S6115581U
- Authority
- JP
- Japan
- Prior art keywords
- paper
- output
- photoelectric sensor
- comparator
- detection device
- 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【図面の簡単な説明】
第１図は本発明による用紙検出装置の実施例を示したブ
ロック図：第２図は同実施例の動作を説明するための波
形図である。
第３図は用紙検出装貢の従来例を示したブ葡ツク図、第
４図はその動作を説明するための波形図である。
１・・・光電センサ、１１・・・発舛ダイオード、１２
・・・ホトトランジスタ、２・・・用紙、３・・・増幅
器、４・・・コンパレータ、５・・・バッファ増幅器、
５１・・・出力端子、６・・・差動増幅器、６１・・・
ダイオード、６２・・・コンデンサ、Ｔｒ・・・トラン
ジスタ、７・・・反転回路。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a paper detection device according to the present invention; FIG. 2 is a waveform diagram for explaining the operation of the embodiment. FIG. 3 is a book diagram showing a conventional paper detection device, and FIG. 4 is a waveform diagram for explaining its operation. 1... Photoelectric sensor, 11... Laser diode, 12
...Phototransistor, 2...Paper, 3...Amplifier, 4...Comparator, 5...Buffer amplifier,
51... Output terminal, 6... Differential amplifier, 61...
Diode, 62... Capacitor, Tr... Transistor, 7... Inverting circuit.
Claims (1)
変柄して出力する光電センサと、前記光電センサの出力
を予め定められた設定値と比較して、その出力がその設
定値を越えたときに出力する比較器とからなり、前記光
電センサの検出部に前記用紙が有する状態が無い状態か
を前記比較器の出力の変化により判別する用紙検出器に
おいて、前記光電センサの検出部に前記用紙が無い状態
での出力と有る状態での出力の差をとって前記比較器に
出力する差動回路を設けて構成したことを特徴とする用
紙検出装置。A photoelectric sensor that photoelectrically changes the amount of light transmitted through the paper that passes through the detection unit and outputs the result, and the output of the photoelectric sensor is compared with a predetermined set value, and the output exceeds the set value. and a comparator that outputs an output when the detection unit of the photoelectric sensor detects the paper, and determines whether the paper is in a state in which the detection unit of the photoelectric sensor has a state or not, based on a change in the output of the comparator. A paper detection device comprising a differential circuit that calculates the difference between an output when there is no paper and an output when there is paper and outputs the difference to the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10022784U JPS6115581U (en) | 1984-07-03 | 1984-07-03 | Paper detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10022784U JPS6115581U (en) | 1984-07-03 | 1984-07-03 | Paper detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6115581U true JPS6115581U (en) | 1986-01-29 |
Family
ID=30659693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10022784U Pending JPS6115581U (en) | 1984-07-03 | 1984-07-03 | Paper detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6115581U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53114310A (en) * | 1977-03-16 | 1978-10-05 | Toshiba Corp | Paper leaf detector |
-
1984
- 1984-07-03 JP JP10022784U patent/JPS6115581U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53114310A (en) * | 1977-03-16 | 1978-10-05 | Toshiba Corp | Paper leaf detector |
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