A Fault Diagnosis Method for Deterministic Slot Communication Sensor Nodes

Abstract

The invention belongs to the field of industrial internet of things, and relates to a fault diagnosis method of a deterministic time slot communication sensor node; the diagnosis method includes that the wireless sensor node periodically sends command frames to other wireless sensor nodes based on the deterministic time slot ; If the current wireless sensor node does not receive the command frame sent by its neighbor wireless sensor node within a certain period; detect whether the current wireless sensor node has a hard failure; if the current wireless sensor node does not have a hard failure, A time series analysis algorithm based on an autoregressive model is then used to detect whether a soft fault occurs in the current wireless sensor node; the present invention can monitor the state of the wireless sensor node at the industrial site in real time, and for a wireless sensor node that fails, By using the detection method for hard faults and soft faults proposed in the present invention, faulty wireless sensor nodes can be found in time and the fault type of the nodes can be determined, thereby ensuring the reliability of the wireless sensor network.

Description

A Fault Diagnosis Method for Deterministic Time Slot Communication Sensor Nodes technical field The invention belongs to the field of Industrial Internet of Things, and relates to a fault diagnosis method for a deterministic time slot communication sensing node. Law. Background technique With the development of modern industry in the direction of automation, precision, intelligence and networking, industrial sites have large A large number of wireless sensing devices, including temperature and humidity sensors, smoke sensors, pressure sensors, acceleration sensors, infrared sensors Sensors, etc., data exchange and actions are continuously carried out between these sensor devices, so as to realize the automation of industrial production, and Greatly improve the quality and efficiency of industrial production; industrial wireless network is to realize the interconnection of wireless sensor equipment in industrial environment The important foundation of the industrial...

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Problems solved by technology

[0003] However, the environment of industrial sites is generally harsh, such as high temperature, dust, noise, high humidity, etc., and wireless sensor nodes are usually directly exposed to this environment without any protective measures. The probability is very high. The failure of wireless sensor nodes is divided into hard failure and soft failure. Communicate with its neighbor nodes, and the communication components and energy supply components of the faulty node are working normally, but the information obtained during communication is wrong

[0004] Therefore, how to find faults and identify faults in time will be an important content to ensure the reliability of industrial wireless networks, which is of great significance; currently, fault diagnosis for sensor nodes mainly includes physical redundancy methods, model-based methods, neural network-based methods, etc. However, these methods have certain shortcomings, so further improvement is needed

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