Research on the whole chain traceability system of dairy products based on consortium blockchain

Dairy products are one of the indispensable foods in people's life. However, reports about the quality and safety of dairy products often appear. In this paper, a dairy product quality and safety traceability system based on consortium blockchain is proposed by using block chain technology. In addition, the traceability link in the dairy supply chain is defined, and the basic framework and traceability bar code of the traceability system are designed. The system guarantees the integrity and security of the traceability information from the technical level, and provides the dairy traceability service for the government, enterprises and consumers.

Calibration of Displacement Laser Interferometer Systems for Industrial Metrology

Displacement laser interferometer systems are widely used for the calibration of machine tools and CMMs (Coordinate Measuring Machines). Additionally, they are often the workhorse in dimensional calibration laboratories, where they act as the basic metrological traceability link for many calibrations. This paper gives a review of the calibration of such systems, where several approaches, such as the calibrations of separate components or the system as a whole, are reviewed. The calibrations discussed are: the laser frequency, the counting system, software evaluation of the environmental conditions, environmental and material temperature sensor calibration and the calibration of optics that is part of the system. For these calibrations considerations are given about the ways these can be carried out and about establishing the re-calibration intervals.