Two-layer wireless sensor network system for monitoring automatic production line

Abstract

The invention discloses a two-layer wireless sensor network system for monitoring automatic production line. The two-layer wireless sensor network system for monitoring automatic production line comprises field device nodes, gateway nodes, cluster head nodes and a monitoring computer. A plurality of clusters formed by the field device nodes and two cluster head nodes are connected with one another, pass through the gateway nodes and finally are transmitted to the monitoring computer, and the two cluster head nodes are a master cluster head and a redundancy cluster head respectively. According to the two-layer wireless sensor network system for automatic production line monitoring, a star network is set according to the technological process, real-time requirement for data transmission in the process can be met, redundant time slots are designed for roll poling of all the nodes, and communication reliability is improved; the redundancy cluster head and a redundancy routing are designed for a backbone network, communication reliability of the backbone network is improved, end-to-end time delay is 2N, N is a communication hop count, and communication real time performance of the backbone network is improved.

Description

technical field [0001] The invention relates to a network system, in particular to a two-layer wireless sensor network system for monitoring an automatic production line. Background technique [0002] With its advantages of easy deployment, convenient expansion, and low maintenance cost, wireless sensor networks are gradually applied in industrial automation systems, and are regarded as new development trends and technical hotspots in industrial automation after fieldbus and industrial Ethernet. [0003] In building automation and process automation systems, industrial wireless sensor networks have been gradually deployed. In the application of automatic production line system, wireless sensor network still faces some challenges and technical bottlenecks. The biggest challenge lies in communication reliability and real-time performance. At present, typical industrial wireless sensor network systems, such as WirelessHart, rely on mesh networks to provide multi-path ...

AI Technical Summary

Problems solved by technology

In an automated production line, because the process flow is often narrow and long, there are often no large number of communication nodes in the horizontal area, and it is difficult to form a mesh network. Moreover, multi-hop communication is required in the vertical direction. The deterioration of the communication quality of each hop link in the communication will eventually lead to communication failure.

Generally, industrial wireless communication is based on the TDMA scheduling strategy, and multi-hop communication requires more time slots, which challenges real-time communication

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