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川崎製鉄技報

KAWASAKI STEEL GIHO Vol. 22(1990) No.2

設備診断と計測技術

Machine Condition Diagnosis and Instrumentation and Control Techniques

飯田 永久(Nagahisa Iida) 下西 幾二(Ikuji Shimonishi) 近藤 広章(Hiroaki Kondo) 要旨 : 設備診断技術と計測技術の関係を,(1)設備診断の重要な要素技術としての計測技術および (2)診断の対象としての計測設備の二つの観点から論述した。要素技術としての計測技術は, 従来センシングが重要であったが,信号処理,診断論理の点でも重要性が増してきた。ま た当社の事例にも,計測制御設備を対象にしたものが増えてきつつある。知識工学を応用 した圧延機油圧装置の診断システム,圧延機直近厚さ計の遠隔診断システム等がその例で ある。新しい傾向として,プロセス全体の診断を,製品品質等から総合的に行おうとする 試みがみられる。今後の展開としては,知識工学の応用が設備診断技術に与える影響がま すます大きくなると予測される。 Synopsis :

Machine condition diagnosis technique is closely related to and largely depends on instrumentation and control techniques. Not only the detection and processing of signals from the equipment concerned, but also judging or diagnosing algorithms are given by control techniques, including knowledge engineering. This paper describes the roles of instrumentation and control techniques in the machine condition diagnosis and general situation of the diagnosis systems around the instrumentation and control devices or systems at Kawasaki Steel, with some actual examples. Among them explained are an expert system, one of the knowledge engineering techniques, applied to a hydraulic rolling mill control system, and a monitoring system for a γ-ray thickness gauge in very severe circumstances. The probability is also suggested that physical and operational conditions of a production line can be diagnosed using, as diagnosis parameters, the information of the product quality and the overall performance of the line.

(c)JFE Steel Corporation, 2003

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