Průmyslové bezdrátové sítě a protokoly na mobilních vestavěných systémech řízení

Abstract

A dissertation thesis deals with issue of industrial wireless networks and communication protocols use in a mobile embedded control systems. The goal of setting wireless communication in embedded control systems is build up sophisticated industrial communication networks which will bring cut-down implementation of the expenditure and enables communication with the mobile or moving devices in the real time. The work is focus especially in field of communication using industrial Ethernet and industrial interface CAN. The wireless network takes in the solution some risk in point of view security and reliability in comparison with classic wire industrial communication networks. On the other hand when you eliminate aspects of a some uncertainty it bring wide new solutions what will reduces realization cost and enable more flexible solution in view of changing manufacturing processes. The industrial wireless network serves for data frame transmission between particular nodes communication network where industrial network must to meet requirements what are set before. There is measured time delay, rerouting rate, network data transmission efficiency and recovery rate after fail between particular communication nodes within the frame of network. The next important parts of the network are diagnostic tools use for a parameters debugging for the given wireless communication network. The wireless network is set based on defined communication model which simulate various state of the network and allow its detail profiling. The wireless network is designed for parallel processing of data frames and use MIMO tech which enables simultaneous processing of a couple input and output data frames in the one beat. Simulated and analyzed transmission data frames are taken from the model of the communication network and in consequence the real measurement data are obtained from embedded communication systems. The measurements are practiced on the communication modules using OFDM modulations and enable simultaneously connect more physical communication channels at the same time – MIMO systems. The measured transmission data are evaluated and analyzed based on the time priority flags. The communication network is conceived as third and fourth generation of wireless network allows communication in the couple frequency bands and in the concrete in the range of the free band 2.4GHz and then free frequency band 5GHz that is used for the particular mobile embedded devices as a backbone synchronizing channel. Dissertation result is model schema and methodology of the wireless communication system allows systems process control in the real time. A part of the work is shift of model communication design in the field of objects area and implementation using UML language. The work result towards in the branch of industrial robotics and control and next results into the branch of automotive industry. The embedded communication system is realized on 32.bits processor i.MX35 whereon was executed validation of the design models and methods for the wireless communication between mobile devices.