Abstract
With the growing popularity of complex dynamic activities in manufacturing processes, traceability of the entire life of every product has drawn significant attention especially for food, clinical materials, and similar items. This paper studies the traceability issue in cyber-physical manufacturing systems from a theoretical viewpoint. Petri net models are generalized for formulating dynamic manufacturing processes, based on which a detailed approach for enabling traceability analysis is presented. Models as well as algorithms are carefully designed, which can trace back the lifecycle of a possibly contaminated item. A practical prototype system for supporting traceability is designed, and a real-life case study of a quality control system for bee products is presented to validate the effectiveness of the approach.
Highlights
A cyber-physical system (CPS) is a system of collaborating computational elements controlling physical entities
In a manufacturing system equipped with CPS techniques, which is called a cyber-physical manufacturing system, machines as well as human workers constitute the physical resources, and data is collected from the sensors of these resources which constitutes the cyber part of the system
Traceability has always been an important issue in manufacturing, especially for food and clinical materials
Summary
A cyber-physical system (CPS) is a system of collaborating computational elements controlling physical entities. Sensors 2016, 16, 382 it should be quite necessary to extract valuable information from such data supporting for back-tracing the sources of the defect Such traceability problem has become one of the most important issues in the design, implement and management of manufacturing systems. Different from most of the traditional approaches which trace an item by RFID tags, this paper digs into detailed production procedures and studies several basic patterns capturing elementary aspects of atomic manufacturing process. Algorithms based on the model are proposed, with which all the manufacturing procedures related to the item for traceability analysis can be ordinally listed with detailed production data. A prototype system supporting traceability in CPS-based manufacturing is designed Several techniques such as data entity generation, service provisioning, and service orchestration are applied, and a real-life case study for bee products quality control is presented.
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