MANAGEMENT METHOD OF AUTOMATICALLY IDENTIFYING EVERY STEEL PIPE

PROBLEM TO BE SOLVED: To provide a management method of automatically identifying every steel pipe which is prevented from reading mistake upon automatic reading and does not require any human work such as attaching or detaching a label once labeled or an IC tag, removal of a laser processed portion, and so on.SOLUTION: The present invention is directed to an automatic identification management method for each of steel pipes 1, 2 subjected to processing treatments in a plurality of manufacturing processes. The automatic identification management method has a step of printing a two-dimensional code obtained by encoding manufacturing information of a steel pipe on an outer surface of the steel pipe in a way in which each of cells forming the two-dimensional code is divided into a plurality of dots, and a step of automatically reading a printed two-dimensional code with six or more cameras disposed so that visual fields of all cameras 51 - 56 should cover the entire outer surface of the steel pipe when the steel pipe is carried after the code is printed on its surface. The read information is automatically recorded as management information, and the management information can be always read out if necessary.SELECTED DRAWING: Figure 2 【課題】自動読取り時の誤読が無く、貼付したラベルまたはＩＣタグの着脱やレーザー加工部の切除などの人的作業を必要とすることのない鋼管１本毎の自動識別管理方法を提供する。【解決手段】複数の製造工程で加工処理が施される鋼管１、２の１本毎の自動識別管理方法であって、鋼管の製造情報を符号化した２次元コードを、該２次元コードを構成するセルをそれぞれ複数のドットに分割して当該鋼管の外表面に印字するステップと、前記印字後の当該鋼管が搬送されてきた際、各カメラ５１−５６の視野の合計が前記鋼管の全周の外表面を覆うように配置された６台以上のカメラによって２次元コードの印字を自動で読取るステップと、を備える。前記読取り情報を管理情報として自動で記録し、前記管理情報を必要に応じて随時取り出せるようにする。【選択図】図２