JPS6443365U - - Google Patents
Info
- Publication number
- JPS6443365U JPS6443365U JP13756487U JP13756487U JPS6443365U JP S6443365 U JPS6443365 U JP S6443365U JP 13756487 U JP13756487 U JP 13756487U JP 13756487 U JP13756487 U JP 13756487U JP S6443365 U JPS6443365 U JP S6443365U
- Authority
- JP
- Japan
- Prior art keywords
- pulse generator
- detection circuit
- concentration detection
- counter
- toner 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Dry Development In Electrophotography (AREA)
Description
第１図は本考案に係るトナー濃度検出回路の実
施例を示すブロツク図、第２図は実施例の動作説
明図、第３図はパルス発振回路の回路図、第４図
は静電式複写機におけるトナーボツクス及びセン
サコイル配置を示す側断面図、第５図は従来のト
ナー濃度検出回路をマイクロコンピユータに接続
する場合の構成を示すブロツク図、第６図は従来
のトナー濃度検出回路の出力特性を示すグラフで
ある。
５……パルス発振回路、６……クロツク発生器
、７……コントロールロジツク、８……カウンタ
、９……ラツチ、２０……トナーボツクス、ＳＬ
……センサコイル。
Fig. 1 is a block diagram showing an embodiment of the toner concentration detection circuit according to the present invention, Fig. 2 is an explanatory diagram of the operation of the embodiment, Fig. 3 is a circuit diagram of a pulse oscillation circuit, and Fig. 4 is an electrostatic copying circuit. 5 is a block diagram showing the configuration when a conventional toner concentration detection circuit is connected to a microcomputer, and FIG. 6 is an output of the conventional toner concentration detection circuit. It is a graph showing characteristics. 5... Pulse oscillation circuit, 6... Clock generator, 7... Control logic, 8... Counter, 9... Latch, 20... Toner box, SL
...sensor coil.
Claims (1)
利用したパルス発生器の出力パルスを、カウンタ
により一定期間計数し、前記パルス発生器の発振
周波数に比例した計数値を前記カウンタより出力
することを特徴とするトナー濃度検出回路。 A counter counts the output pulses of a pulse generator using a sensor coil disposed on the toner box side for a certain period of time, and the counter outputs a counted value proportional to the oscillation frequency of the pulse generator. toner concentration detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13756487U JPS6443365U (en) | 1987-09-10 | 1987-09-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13756487U JPS6443365U (en) | 1987-09-10 | 1987-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6443365U true JPS6443365U (en) | 1989-03-15 |
Family
ID=31399097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13756487U Pending JPS6443365U (en) | 1987-09-10 | 1987-09-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6443365U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643556A (en) * | 1979-09-19 | 1981-04-22 | Toshiba Corp | Concentration control device of developer |
| JPS5838162B2 (en) * | 1981-09-24 | 1983-08-20 | 株式会社 ヤマト屋 | Bag manufacturing method |
-
1987
- 1987-09-10 JP JP13756487U patent/JPS6443365U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643556A (en) * | 1979-09-19 | 1981-04-22 | Toshiba Corp | Concentration control device of developer |
| JPS5838162B2 (en) * | 1981-09-24 | 1983-08-20 | 株式会社 ヤマト屋 | Bag manufacturing method |
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