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Technical description: PDA data collection has been widely used in metallurgy, petrochemical and other fields. PDA contains a large amount of equipment status and production information. At present, the PDA spot check of key production equipment is completely carried out manually. Due to the problem of personnel skill level and the number of professionals, the spot check effect is not good. With the development of Intelligent manufacturing in enterprises, it is a trend to replace manual routine inspection with automatic routine inspection of PDA data. Automatic routine inspection can improve routine inspection efficiency and reduce manual workload. The product can be widely used in metallurgical equipment fault early warning (such as hydraulic servo system, motor speed angular speed encoder, cylinder position, pressure sensor and other key equipment) or equipment spare parts quality inspection (such as automobile parts quality inspection).