Reliable and real-time industrial wireless local area network transmission method

Abstract

An industrial wireless local area network is widely applied to various industrial fields, data transmission is often interfered due to the special environments of industrial sites, the types of the data needed to the transmitted in the industrial sites are diversified, the data includes state data, control instructions, images and the like, and the transmission performance requirements of the data are different. The invention discloses a reliable and real-time industrial wireless local area network transmission method. The method adopts classified transmission for various types of data, that is to say, important data is transmitted first to guarantee the time sequence requirements. A double confirmation mechanism is adopted to guarantee data accuracy. A data transmission timer timing self-adaptation adjusting method based on network communication state is provided for fully utilizing network bandwidth. By the transmission method, instantaneity and reliability of industrial wireless local area network data transmission can be effectively increased, and application of the industrial local area network to severe industrial environments is promoted.

Description

technical field [0001] The invention relates to a reliable and real-time industrial wireless local area network transmission method, which belongs to the technical field of industrial internet of things. Background technique [0002] The Internet of Things technology can realize intelligent identification, positioning, tracking and monitoring, and has been widely used in various industries. In industrial production, the use of Internet of Things technology can improve the perception granularity of the production process and realize the intelligence of the production process. For example, in the iron and steel production process, the monitoring and optimization of production material flow can be realized through IoT technology. In the iron and steel production warehouse area, the perception and tracking of the production material flow are realized through image, radio frequency identification and mobile terminals, and then the interconnection with the manufacturing execution...

AI Technical Summary

Problems solved by technology

The first is the path loss. Due to the attenuation characteristic of the wireless signal as the transmission distance increases, the farther the transmission distance is, the lower the signal-to-noise ratio of the received signal is; high transmit power

The second is attenuation loss. On the line-of-sight route of wireless transmission, if there is an occluding object with a large geometric size such as a steel frame column, it will not only increase the path loss index, but also cause additional signal attenuation and reduce the signal of the received signal. noise ratio

During the transmission process, radio waves will encounter various metal obstacles, which will cause reflection, scattering and diffraction of radio waves and produce multiple propagation modes. After reaching the receiving end through different transmission paths, multipath effects will occur, resulting in communication errors. The rate increases, the signal-to-noise ratio decreases, and the performance decreases

In addition, there are electrical equipment such as large motors in the industrial production site, and the working status of these equipment will also cause certain interference to wireless communication

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