Method of information reduction with maintaining measurement accuracy in field-level networks of data collection systems for technological parameters in metallurgical industry

The purpose of this study is to develop a new method of information reduction in data collection systems of technological parameters implemented on the basis of field-level networks based on the ANSI/TIA/EIA-485 standard to reduce the amount of redundant information generated by secondary converters of measuring instruments based on the readings of primary converters transported in data transmission networks and stored in devices storage. To solve this problem, it is proposed to use a new method of processing initial data at the sampling stage using modified firmware of the built-in microcomputer of the secondary converter of the measuring device. The proposed method is based on selecting such a number of discrete values (reference points) from a set of initial discrete quantities, relative to which it is possible to describe the remaining values in some mathematical way with control of the accuracy of restoring values by calculation at each step, followed by discarding the elements of the series that are not reference points (reduction). In order to verify the described method, there has been developed a way to reduce the redundancy information in field-level networks with maintaining the required measurement accuracy based on linear approximation. The software implementation of the developed way has shown its applicability for data reduction in real-time systems in the stream of conversion of discrete quantities of the original signal. The developed way based on the proposed method provides a significant reduction in the amount of redundant information, the greater the more uniform the changes in the values of the original series. This makes it possible to reduce the number of stored discrete values, reduce the load on network communications of real-time systems, and provide the ability to poll more devices connected to the bus topology field-level network without changing the data exchange rate.