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Secure data storage and service automation for cyber physical production systems through distributed ledger technologies

Lemme Gordon, Nölscher Kilian Armin, Bei Erhao, Hermeling Christian, Ihlenfeldt Steffen

Journal of Machine Engineering

2021

Vol. 21, No. 1

89--97

In this paper, we use the blockchain technology to design a prototype to secure process data from a 3D-printer. Datastreams are gathered from various sources such as OPC UA servers and autonomous retrofit sensor nodes. This is followed by pre-processing for data reduction, storage in a data model, and the generation of a unique hash value over it. The hash values are stored in a blockchain using appropriate consensus methods, taking into account their temporal origin and production identification number. This also includes the context-related influence of sensor signals on the production process Restrictive access regulations using smart contracts make a partially or fully automated machine tool calibration possible. In this context, we show to realize a process partial or full automation through smart contracts. Physical machine tools and virtual simulations are integrated into the block-chain network to document the stability and performance.