JPS6146647U - barcode reader - Google Patents
barcode readerInfo
- Publication number
- JPS6146647U JPS6146647U JP13234884U JP13234884U JPS6146647U JP S6146647 U JPS6146647 U JP S6146647U JP 13234884 U JP13234884 U JP 13234884U JP 13234884 U JP13234884 U JP 13234884U JP S6146647 U JPS6146647 U JP S6146647U
- Authority
- JP
- Japan
- Prior art keywords
- barcode
- analog signal
- converter
- output
- detection 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.)
- 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案のバーコードリーグのデコーダ部の主要
部構成を示すブロック図、第２図は本考案のスレツシュ
検出回路の回路図、第３図ａ，は本考案のスレツシュ検
出回路の動作を説明するための波形図、第４図はバーコ
ードリーグのブロック図、第５図は従来のバーコードリ
ーグのＡ／Ｄ変換器のブロック図である。
第６図は従来のバーヨードリーグのＡ／Ｄ変換器の動作
説明図で、同図ａはバーコードの一例を示す平面図、ｂ
％は各信号の波形図である。Fig. 1 is a block diagram showing the main structure of the decoder section of the barcode league of the invention, Fig. 2 is a circuit diagram of the threshold detection circuit of the invention, and Fig. 3a shows the operation of the threshold detection circuit of the invention. FIG. 4 is a block diagram of a barcode league, and FIG. 5 is a block diagram of a conventional barcode league A/D converter. Fig. 6 is an explanatory diagram of the operation of the conventional A/D converter of the Baryodo League, in which a is a plan view showing an example of a barcode, and b is a plan view showing an example of a barcode.
% is a waveform diagram of each signal.
Claims (1)
部と、該読取ヘッド部からのバーコードアナログ信号出
力をデイジタル信号に変換するＡ／Ｄ変換器と該Ａ／Ｄ
変換器の出力からバーコードを解読するマイクロプロセ
ッサ（以下ｒ″ｃｐｕＪと言う）を具備しバーコードデ
ータを解読するためのデコーダ部とを備えてなるバーコ
ードリーグであって、 上記Ａ／Ｄ変換器は、入力されるバーコードアナログ信
号波形の白のピーク及び黒のピークをそれぞれホールド
する白ピークホールド回路及び黒ピークホールド回路と
、該２つのピークホールド回路ア系一ルド値の中間値を
見出すスレツシュ検出回路と、該スレツシュ検出回路の
出力と上記バーコードアナログ信号を入力しバーコード
デイジタル信号出力を発生するコンパレータを備えてな
り、 上記スレツシュ検出回路にスレツシュレベルの可変手段
を設け上記ＣＰＵがバーコードを解読できない時に発生
する制御信号によってスレツシュレベルを解読可能にな
るまで変化させるようにしたことを特徴とするバーコー
ドリーグ。[Claims for Utility Model Registration] A reading head unit that reads a barcode from the barcode label surface, an A/D converter that converts the barcode analog signal output from the reading head unit into a digital signal, and the A/D converter that converts the barcode analog signal output from the reading head unit into a digital signal.
A barcode league comprising a microprocessor (hereinafter referred to as r"cpuJ) that decodes a barcode from the output of a converter and a decoder unit that decodes the barcode data, the A/D conversion as described above. The device uses a white peak hold circuit and a black peak hold circuit to hold the white peak and black peak of the input barcode analog signal waveform, respectively, and finds an intermediate value between the combined values of the two peak hold circuits. The CPU comprises a threshold detection circuit, and a comparator that inputs the output of the threshold detection circuit and the barcode analog signal to generate a barcode digital signal output, and the threshold detection circuit is provided with a threshold level variable means, and the CPU The barcode league is characterized in that the threshold level is changed until the barcode becomes decodable by a control signal generated when the barcode cannot be decoded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13234884U JPS6146647U (en) | 1984-08-31 | 1984-08-31 | barcode reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13234884U JPS6146647U (en) | 1984-08-31 | 1984-08-31 | barcode reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6146647U true JPS6146647U (en) | 1986-03-28 |
Family
ID=30690914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13234884U Pending JPS6146647U (en) | 1984-08-31 | 1984-08-31 | barcode reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6146647U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52130242A (en) * | 1976-04-26 | 1977-11-01 | Hitachi Ltd | Slice level selecting system |
-
1984
- 1984-08-31 JP JP13234884U patent/JPS6146647U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52130242A (en) * | 1976-04-26 | 1977-11-01 | Hitachi Ltd | Slice level selecting system |
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