JPH0381178A - Printing density judging apparatus - Google Patents

Printing density judging apparatus

Info

Publication number
JPH0381178A
JPH0381178A JP1218944A JP21894489A JPH0381178A JP H0381178 A JPH0381178 A JP H0381178A JP 1218944 A JP1218944 A JP 1218944A JP 21894489 A JP21894489 A JP 21894489A JP H0381178 A JPH0381178 A JP H0381178A
Authority
JP
Japan
Prior art keywords
printing
sensor
characters
printed
supplied
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
Application number
JP1218944A
Other languages
Japanese (ja)
Inventor
Shunichi Uehara
上原 俊一
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 JP1218944A priority Critical patent/JPH0381178A/en
Publication of JPH0381178A publication Critical patent/JPH0381178A/en
Pending legal-status Critical Current

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  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

PURPOSE:To automatically judge whether printing density is proper by printing characters having segments in a specific longitudinal direction by one line and counting the number of said segments to judge density by a reflective sensor. CONSTITUTION:After printing characters 11 of a form capable of being read by a sensor 10 are printed by one line among printer printing lines, a carrier part is returned to the original position without feeding paper to be allowed to again run on the same axis as a printing surface and the number of longitudinal bars is counted by the sensor. When this number coincides with the number of preliminarily printed characters, reading is performed normally and, even when OCR characters are printed, it can be judged that normal reading is possible. If this judgement is abnormal, when a current is supplied to a reflective sensor 13 from a power supply VCC through a resistor R3 18, a light emitting diode 24 lights. This light passes through a lens part 23 to be reflected by printing paper 14 and returns to the lens part 23 to return to a photodiode 25. This light is finally supplied to the operational amplifier 15 of an external circuit to be amplified to a proper value and subsequently supplied to a level judging comparator 16 to judge printing presence and absence.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はプリンタの印字濃度を自動判定する方式に関す
る。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for automatically determining print density of a printer.

〔従来の技術〕[Conventional technology]

従来、プリンタでOCR用文字及びバーコードを印字さ
せて使用する場合、各々の読取機が正常に読取るかどう
かは定量的に判定する手段はなく、目視による人間の感
によりインクリボンの交換等を行なっていた。
Conventionally, when using a printer to print OCR characters and barcodes, there is no way to quantitatively determine whether each reader can read them correctly, and it is necessary to change the ink ribbon based on human intuition through visual inspection. I was doing it.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来の方法では、読取機のセンサと人間の視感
との相違があるために、正常に読取れない事故が出ると
いう欠点があった。
The above-described conventional method has the disadvantage that there is a difference between the sensor of the reader and the human visual sense, resulting in an accident in which the image cannot be read properly.

〔課題を解決するための手段〕[Means to solve the problem]

本発明では、上述した問題点を解決するために、プリン
タのキャリア部(シリアルプリンタで印字のためプリン
トヘッド、リボンを搭載した部分のことで以後「キャリ
ア部」と呼ぶ)に、′オプティカルリフレクチイブセン
サ(光センサで発行部及び反射検査部と同一モジスール
内に実装したもので以後「リフレクチイブセンサ」と呼
ぶ)を搭載し、OCR文字又はバーコードを印字させて
使用する前に予め、規定のテストパターンを印字させて
これをリフレクチイブセンサで読取りせて印字濃度が適
正かどうかを自動判定するものである。
In order to solve the above-mentioned problems, the present invention provides an optical reflector in the carrier section of the printer (the section on which the print head and ribbon are mounted for printing in a serial printer, hereinafter referred to as the "carrier section"). Equipped with a reflective sensor (an optical sensor mounted in the same module as the issuing unit and reflective inspection unit, hereinafter referred to as the "reflective sensor"), before printing OCR characters or barcodes and using it, A prescribed test pattern is printed and read by a reflective sensor to automatically determine whether the print density is appropriate.

判定後の処理は、■自動的に印字圧を上げる。Processing after determination: ■ Automatically increases printing pressure.

■自動的に2バス印字にする。(同一光を2度印字させ
る。)■リボン交換の「表示」をし、主導で交換させる
等があるが、今回の範囲は「判定」までとする。
■Automatically prints in 2 buses. (The same light is printed twice.) - There is a ``display'' for ribbon replacement, and the ribbon is replaced under the initiative, but this time the scope is up to ``judgment''.

〔実施例〕〔Example〕

次に本発明について、図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第1図、第2図は本方式センサの配置構成図であり、印
字された文字を印字読取り判定する為に、印字面と同一
軸に配置されている。
FIGS. 1 and 2 are layout diagrams of the sensor of this system, which is arranged on the same axis as the printing surface in order to read and judge printed characters.

第3図は、印字サンプル及び読取方式である。FIG. 3 shows a print sample and reading method.

具体的には、濃度判定を実施する時、まずセンサが読り
取れる形式の印字文字(英文字の”′工″数字の″1″
等)をプリンタ印字行の1行分印字させた後、用紙送り
をせずに、キャリア部を元にもどし、印字面と同一軸を
再度走行させ、センサーで縦バー(“I′”又は°“1
″等)の数をカウントする。
Specifically, when performing concentration determination, first print characters in a format that the sensor can read (alphabetic characters "'" and numbers "1").
etc.), print one line of the printer print line, then return the carrier section to its original position without feeding the paper, run it again on the same axis as the printing surface, and use the sensor to print the vertical bar ("I'" or °" 1
″, etc.).

この数が、あらがしめ印字された文字の数と一致すれば
、正常に読取が行なわれ、OCR文字、バーコード等を
印字させても盛業に読取可能と判定できる。
If this number matches the number of characters printed with irregularities, it can be determined that reading is performed normally and that even if OCR characters, bar codes, etc. are printed, they can be read successfully.

この判定が異状であれば、対応策は種々あるが、考えら
れる方式としてば次のような方法がある。
If this determination is abnormal, there are various countermeasures, including the following methods.

第1番目は、プリンタの印字圧を「強」に設定しなおし
、再度判定動作の実施する。(自動化可能) 第2番目は、2パス方式(1行同一文字列を2度印字す
る〉に切替え、再度判定動作を実施する。(自動化可能
) 第3番目は、1.2の方法でも否判定に場合で、リボン
交換の表示を出し、オペレータに、リボン交換が必要な
ことを知らせる。
First, the printing pressure of the printer is reset to "strong" and the determination operation is performed again. (Can be automated) The second method is to switch to the two-pass method (printing the same character string twice in one line) and perform the judgment operation again. (Can be automated) The third method is to If the judgment is made, a ribbon replacement display is displayed to inform the operator that ribbon replacement is necessary.

第4番目は、引用側回路図でセンサ部の所を示す。The fourth diagram shows the sensor part in the reference side circuit diagram.

まず、電源vCCより18の抵抗R3を通してリフレク
チイブセンサエ3に電流を供給すると24の発光ダイオ
ードが点灯する。この光は、23のレンズ部を通り14
の印字用紙で反射し、23のレンズ部へもどり、25の
ホトダイオードへもどる。これが、最終的に外部回路の
オペアンプ15へ供給され適正な値に増幅された後レベ
ル判定用のコンパレータ16へ供給され、印字有、印字
無を実施するものである。
First, when a current is supplied from the power supply vCC to the reflective sensor 3 through 18 resistors R3, 24 light emitting diodes are turned on. This light passes through 23 lens sections and 14
It is reflected by the printing paper, returns to the lens section 23, and returns to the photodiode 25. This signal is finally supplied to an operational amplifier 15 in an external circuit, amplified to an appropriate value, and then supplied to a comparator 16 for level determination, which determines whether printing is present or not.

22の■R1可変抵抗は判定レベルの調整用である。No. 22 (1) R1 variable resistor is for adjusting the judgment level.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明により印字濃度の適正値かど
うか自動判定でき、インクリボンの交換時期を明確にで
きるようになり、これを適用したプリンタで印字させた
OCR文字又はバーコード等の読取り率は飛躍的に向上
する効果がある。
As explained above, according to the present invention, it is possible to automatically determine whether the print density is at an appropriate value, it is now possible to clearly determine when to replace the ink ribbon, and the reading rate of OCR characters or barcodes printed by a printer to which this is applied is possible. has the effect of dramatically improving

【図面の簡単な説明】[Brief explanation of drawings]

第1図、第2図は本発明の一実施例におけるセンサの取
付位置を示す図、第3図は、判定のための印字文字とセ
ンサの読取り、移動方向を示す図、第4図は使用回路の
回路図である。 l・・・・・・リフレクチイブセンサ、2・・・・・・
プリントヘッド、3・・・・・・リボンカートリッジ、
4・・・・・・プラテン、5・・・・・・印字用紙、6
・・・・・・リフレクチイブセンサ、7・・・・・・プ
リントヘッド、8・・・・・・プラテン、9・・・・・
・印字用紙、10・・・・・・リフレクチイブセンサ、
11・・・・・・印字文字(英文字”I”)、12・・
・・・・センサの読取方向、13・・・・・・リフレク
チイブセンサ内部回路、14・・・・・・印字用紙、1
5・・・・・・オペレーションアンプ、16・・・・・
・コンパレータ、17・・・・・・判定出力信号、18
〜21・・・・・・抵抗、22・・・・・・可変抵抗、
23・・・・・・リフレクチイブセンサのレンズ部、2
4・・・・・・発光ダイオード、25・・・・・・ホト
ダイオード。
Figures 1 and 2 are diagrams showing the mounting position of the sensor in an embodiment of the present invention, Figure 3 is a diagram showing printed characters for determination, sensor reading, and movement direction, and Figure 4 is a diagram showing the use of the sensor. It is a circuit diagram of a circuit. l...Reflective sensor, 2...
Print head, 3... Ribbon cartridge,
4...Platen, 5...Print paper, 6
... Reflective sensor, 7 ... Print head, 8 ... Platen, 9 ...
・Print paper, 10...Reflective sensor,
11...Printed character (English letter "I"), 12...
...Sensor reading direction, 13...Reflective sensor internal circuit, 14...Printing paper, 1
5... Operation amplifier, 16...
・Comparator, 17... Judgment output signal, 18
~21...Resistance, 22...Variable resistance,
23...Lens part of reflective sensor, 2
4... Light emitting diode, 25... Photo diode.

Claims (1)

【特許請求の範囲】[Claims] リシアルプリンタのキャリア部でかつ、印字軸と同一軸
に搭載されたリフレクティブセンサを利用し、印字濃度
の良否判定を行なうもので、読取方式は特定の縦方向の
線分を有する文字を1行分印字させた後、その線分の数
をカウントし、濃度の判定を行なう事を特徴とする印字
濃度判定方式。
This system uses a reflective sensor mounted on the carrier part of the printer and on the same axis as the printing axis to determine the quality of the print density. A printing density determination method that is characterized by counting the number of line segments after printing and determining the density.
JP1218944A 1989-08-24 1989-08-24 Printing density judging apparatus Pending JPH0381178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1218944A JPH0381178A (en) 1989-08-24 1989-08-24 Printing density judging apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1218944A JPH0381178A (en) 1989-08-24 1989-08-24 Printing density judging apparatus

Publications (1)

Publication Number Publication Date
JPH0381178A true JPH0381178A (en) 1991-04-05

Family

ID=16727779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1218944A Pending JPH0381178A (en) 1989-08-24 1989-08-24 Printing density judging apparatus

Country Status (1)

Country Link
JP (1) JPH0381178A (en)

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