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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 6. Отображено 6.
15-08-2019 дата публикации

METHOD FOR DETECTING DEFECTIVE PRINTING NOZZLES IN AN INKJET PRINTING MACHINE

Номер: US20190248153A1
Автор: JOHANNES MUEHL, HANS KOEHLER, ROLAND STENZEL, ANDREAS HENN, MARTIN MAYER, STEFFEN NEEB, FRANK MUTH, JAN KRIEGER, NICKLAR RAYMOND NORRICK, MINA ABOSETTA, MUEHL JOHANNES, KOEHLER HANS, STENZEL ROLAND, HENN ANDREAS, MAYER MARTIN, NEEB STEFFEN, MUTH FRANK, KRIEGER JAN, NORRICK NICKLAR RAYMOND, ABOSETTA MINA, MUEHL, JOHANNES, KOEHLER, HANS, STENZEL, ROLAND, HENN, ANDREAS, MAYER, MARTIN, NEEB, STEFFEN, MUTH, FRANK, KRIEGER, JAN, NORRICK, NICKLAR RAYMOND, ABOSETTA, MINA
Принадлежит: HEIDELBERGER DRUCKMASCHINEN AG

A method for detecting defective printing nozzles in an inkjet printing machine includes printing a multi-row printing nozzle test chart formed of horizontal rows of equidistant vertical lines periodically underneath one another, with only printing nozzles in a print head contributing to every row of the test chart corresponding to the horizontal rows. An area coverage element geometrically associated with the test chart is printed, both elements are recorded by an image sensor and analyzed by the computer. The computer analyzes the recorded area coverage element to detect print defects and allocates defects to a region of geometrically close printing nozzles. An analysis of the test chart in the region identifies nozzles causing the defect. Defective printing nozzles are detected based on thresholds, the detected printing nozzles are then compensated, and in the analysis of the recorded area coverage element, influences of the sensor are eliminated by shading correction.

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Номер записи: 1
31-03-2020 дата публикации

Method for detecting defective printing nozzles in an inkjet printing machine

Номер: US0010603923B2
Автор: Johannes Muehl, Hans Koehler, Roland Stenzel, Andreas Henn, Martin Mayer, Steffen Neeb, Frank Muth, Jan Krieger, Nicklas Raymond Norrick, Mina Abosetta, MUEHL JOHANNES, KOEHLER HANS, STENZEL ROLAND, HENN ANDREAS, MAYER MARTIN, NEEB STEFFEN, MUTH FRANK, KRIEGER JAN, NORRICK NICKLAS RAYMOND, ABOSETTA MINA, Muehl, Johannes, Koehler, Hans, Stenzel, Roland, Henn, Andreas, Mayer, Martin, Neeb, Steffen, Muth, Frank, Krieger, Jan, Norrick, Nicklas Raymond, Abosetta, Mina
Принадлежит: Heidelberger Druckmaschinen AG, HEIDELBERGER DRUCKMASCH AG, HEIDELBERGER DRUCKMASCHINEN AG

A method for detecting defective printing nozzles in an inkjet printing machine includes printing a multi-row printing nozzle test chart formed of horizontal rows of equidistant vertical lines periodically underneath one another, with only printing nozzles in a print head contributing to every row of the test chart corresponding to the horizontal rows. An area coverage element geometrically associated with the test chart is printed, both elements are recorded by an image sensor and analyzed by the computer. The computer analyzes the recorded area coverage element to detect print defects and allocates defects to a region of geometrically close printing nozzles. An analysis of the test chart in the region identifies nozzles causing the defect. Defective printing nozzles are detected based on thresholds, the detected printing nozzles are then compensated, and in the analysis of the recorded area coverage element, influences of the sensor are eliminated by shading correction.

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Номер записи: 2
12-05-2020 дата публикации

Determination of thresholds to detect missing printing nozzles

Номер: US0010647110B2
Автор: Johannes Muehl, Hans Koehler, MUEHL JOHANNES, KOEHLER HANS, Muehl, Johannes, Koehler, Hans
Принадлежит: Heidelberger Druckmaschinen AG, HEIDELBERGER DRUCKMASCH AG, HEIDELBERGER DRUCKMASCHINEN AG

A method detects defective printing nozzles in an inkjet printing machine having a computer. The method includes printing a multi-row nozzle test chart for detection purposes, the test chart contains a number of horizontal rows of equidistant vertical lines printed periodically and disposed underneath one another. Wherein in every row of the nozzle test chart periodically only those respective printing nozzles of the print head contribute to the first element of the nozzle test chart that correspond to the specified number of the horizontal rows. An area coverage element geometrically associated with the nozzle test chart is printed. Both elements are recorded by an image sensor and both elements are evaluated by the computer. Defective printing nozzles are identified by evaluating the recorded nozzle test chart by the computer. Defects are allocated in the area coverage element to the printing nozzles in the nozzle test chart by the computer.

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Номер записи: 3
11-04-2019 дата публикации

DETERMINATION OF THRESHOLDS TO DETECT MISSING PRINTING NOZZLES

Номер: US20190105895A1
Автор: JOHANNES MUEHL, HANS KOEHLER, MUEHL JOHANNES, KOEHLER HANS, MUEHL, JOHANNES, KOEHLER, HANS
Принадлежит: HEIDELBERGER DRUCKMASCHINEN AG

A method detects defective printing nozzles in an inkjet printing machine having a computer. The method includes printing a multi-row nozzle test chart for detection purposes, the test chart contains a number of horizontal rows of equidistant vertical lines printed periodically and disposed underneath one another. Wherein in every row of the nozzle test chart periodically only those respective printing nozzles of the print head contribute to the first element of the nozzle test chart that correspond to the specified number of the horizontal rows. An area coverage element geometrically associated with the nozzle test chart is printed. Both elements are recorded by an image sensor and both elements are evaluated by the computer. Defective printing nozzles are identified by evaluating the recorded nozzle test chart by the computer. Defects are allocated in the area coverage element to the printing nozzles in the nozzle test chart by the computer.

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Номер записи: 4
22-08-2019 дата публикации

インクジェット印刷機において欠陥のある印刷ノズルを検出する方法

Номер: JP2019137048A
Автор: ABOSETTA MINA, Andreas Henn, Frank Muth, Hans Koehler, KRIEGER JAN, Martin Mayer, MUEHL JOHANNES, NEEB STEFFEN, Raymond Norrick Nicklas, STENZEL ROLAND, アボセッタ ミーナ, クリーガー ヤン, ケーラー ハンス, シュテンツェル ローラント, ネープ シュテフェン, ヘン アンドレアス, マーティン　マイアー, マイアー マーティン
Принадлежит: HEIDELBERGER DRUCKMASCHINEN AG

【課題】インクジェット印刷機において欠陥のある印刷ノズルを検出する方法である。【解決手段】印刷ノズルテストパターンの各行において、周期的にのみインクジェット印刷機の印刷ヘッドの、所定数の水平の行に対応する複数の印刷ノズルが、印刷ノズルテストパターンに関与し、網点面積エレメントを幾何学的に複数行の印刷ノズルテストパターンに対して対応付けて印刷し、両方のエレメントを、少なくとも１つの画像センサにより取り込んで、評価し、欠陥のある印刷ノズルを、閾値に基づいて検出することが可能であり、次いで欠陥のある印刷ノズルを補整する、方法において、取り込まれた網点面積エレメントの評価により印刷エラーを算出し、印刷エラーを、それぞれ１つの範囲に幾何学的に近接する印刷ノズルに対応付けし、この範囲において、複数行の印刷ノズルテストパターンの評価により、各々の印刷エラーを引き起こす印刷ノズルを特定する。【選択図】図３

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Номер записи: 5
09-05-2019 дата публикации

故障した印刷ノズルを検出する際の閾値の決定

Номер: JP2019069601A
Автор: Hans Koehler, MUEHL JOHANNES, ケーラー ハンス, ミュール ヨハネス
Принадлежит: HEIDELBERGER DRUCKMASCHINEN AG

【課題】コンピュータを用いてインクジェット印刷機において欠陥のある印刷ノズルを検出する方法である。【解決手段】網点面積エレメントにおけるエラーを、ノズルテストパターンにおける印刷ノズルに対応付けし、ノズルテストパターンにおける対応付けられた印刷ノズルのパラメータを、網点面積エレメントにおけるエラーに依存して評価し、所定の値範囲を規定し、値範囲から、各々の対応付けられた印刷ノズルに対する閾値を導出し、欠陥のある印刷ノズルの検出に用いる、方法において、網点面積エレメントにおいて発見されたエラーの対応付けを、対応する箇所におけるずれに基づいて、ノズルテストパターンにおける印刷方向に対して横方向に行い、常に、評価されるべきパラメータを考慮して、最大の確率でエラーを生じさせる、ノズルテストパターンにおける印刷ノズルを、発見されたエラーに対応付けする。【選択図】図３

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Номер записи: 6