Abstract
This article considers wireless technologies in the field of automation of technological processes and production in the energy, chemical, petrochemical and oil refining, gas, railway, mining, metallurgical and other industries where the use of wireless industrial devices is necessary due to specific features. Wireless technologies provide the ability to connect measuring devices directly to the wireless network with further transfer of information through a wireless gateway to an automated control system. This article will discuss the types of wireless networks that are classified according to the possible range of action (Wireless Wide area network, Wireless Local Area Network, Wireless Personal Area Network). The most common standards of organization of wireless industrial networks, including IEEE 802.11 b/g/n, IEEE 802.15.1, IEEE 802.15.4, IEEE 802.16 e, will also be considered, including in the field of management of chemical-technological processes and productions. Data transmission protocols ISA-100.11.a and WirelessHART and a number of their features will be analyzed. The basic standard network structures based on the ISA-100.11.a and WirelessHART protocols, their typical components, will be considered. The article provides an analytical comparison of the ISA100.11a and WirelessHART over the OSI network model layers, including the physical layer, the link layer, the network layer, the transport layer, the session layer, the presentation layer and the application layer (process control, management, security, application sublayer). The main stages of calculation of wireless industrial network are given, in particular: calculation of the network information load, calculation of the network’s energy parameters, frequency-territorial planning, development of the communication scheme and interface with external networks. The formulas for calculating the network information load using Nazarov’s methodology, calculating the network’s energy parameters, taking into account the overall losses in the propagation of radio waves, including losses in free space, losses in partitions and walls inside the building, losses due to interference and signal fading are given.
Highlights
One of the main issues is the introduction of modern wireless technologies in the field of industrial automation
To set up a wireless network with the control system, it is necessary to take into consideration the specifics of network organization, analyse wireless data transfer technologies, calculate and design a wireless network to determine the locations of access points
Wireless networks are classified by data transmission distance as follows: 1. WWAN (Wireless Wide Area Network) - cellular networks
Summary
One of the main issues is the introduction of modern wireless technologies in the field of industrial automation. Creation of the reliable wireless process control systems is long overdue and must be accomplished at the production level, but the enterprise as a whole. Research in this area is carried out all over the world [1,2,3]. In the production of devices of automated control systems using wireless technology, takes into account the scope and conditions of their use Taking these factors into account, it will be able use these devices in the following areas: 1) in chemical, oil and gas industry; 2) in the energy sector; 3) in the mining industry, etc. Wireless technologies are able to integrate measuring devices into a wireless network with the possibility of further transmission of information into an automated control system [4,5,6]
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