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BuKePrinting >> knowledge >> 為什麽條形碼的方向應盡量與印刷方向相一致

為什麽條形碼的方向應盡量與印刷方向相一致

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2021-01-10 | 725 Views | Share:
為什麽條形碼的方向應盡量與印刷方向相一致

為什麽條形碼的方向應盡量與印刷方向相一致

條形碼是由寬度不同、反射率不同的條和空,按照一定的編碼規則(碼制)編製成的,用以表達一組數字或字母符號信息的圖形標識符。即條形碼是一組粗細不同,按照一定的規則安排間距的平行線條圖形。常見的條形碼是由反射率相差很大的黑條(簡稱條)和白條(簡稱空)組成的。當條碼掃描器光源發出的光照射到黑白相間的條碼上時,反射光經聚焦後,照射到光電轉換器上,於是光電轉換器接收到與白條和黑條相應的強弱不同的反射光信號,並轉換成相應的電信號輸出到放大整形電路。由於白條、黑條的寬度不同,相應的電信號持續時間長短也不同。然後根據碼制所對應的編碼規則,便可將條形符號換成相應的數字、字元信息,通過介面電路傳送給計算機系統進行數據處理與管理,便完成了條碼辨讀的全過程由於柔性版粘貼在印版滾筒的錶面使用,沿滾筒的圓周方向會產生拉伸變形,加上印刷壓力的作用而導致圖像變形,如果設計時條形碼的方向與印版滾筒的軸線平行,在印刷時條碼的寬度會發生變形從而導致最終條碼信息的識別不清或誤讀。

為什麽條形碼的方向應盡量與印刷方向相一致
為什麽條形碼的方向應盡量與印刷方向相一致

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