基于主动安全的工业无线网络WIA-FA干扰检测研究

Industrial Wireless WIA-FA Interference Detection Based on Active Safety

工业无线网络WIA-FA在工厂应用时,现场使用的诸如传感器、仪器仪表等工业设备产生的瞬时非平稳信号会影响信息传输的完整性、正确性和及时性。传统的无线干扰检测机制大多针对已作用的干扰进行检测和响应,无法及时做出应对和部署。因此,基于主动网络安全的思想提出了工业无线WIA-FA的干扰检测方法。对WIA-FA物理层信号的传输机制进行了深入分析,指出WIA-FA通信时可能面临的干扰威胁;针对该威胁提出基于主动安全的FICA-STFT干扰检测方法,对WIA-FA环境中工业设备产生的同频、邻频、脉冲干扰与正常信号进行智能分离,实现干扰信号时、频域特征的主动检测;通过仿真实验验证了该检测方法在WIA-FA运行过程中主动发现干扰情况的有效性,为后续检测WIA-FA信道状态的工程应用提供理论基础。

When industrial wireless network WIA-FA is applied in factories,the instantaneous non-stationary signals generated by industrial equipment such as sensors and instruments used on site can affect the integrity,accuracy,and timeliness of information transmission.Traditional wireless interference detection mechanisms mostly detect and respond to interference that has already occurred,and cannot make timely responses and deployments.Therefore,based on the idea of active network security,this article proposes an interference detection method for industrial wireless WIA-FA.Firstly,an in-depth analysis was conducted on the mechanism of signal transmission in the physical layer of WIA-FA,pointing out possible interference threats that WIA-FA may face during communication;Secondly,a FICA-STFT interference detection method based on active security is proposed to address this threat.It intelligently separates the same frequency,adjacent frequency,and pulse interference generated by industrial equipment in the WIA-FA environment from normal signals,and achieves active detection of the time-frequency and frequency-domain characteristics of interference signals;Finally,the effectiveness of this detection method in actively detecting interference during the operation of WIA-FA was verified through simulation experiments,providing a theoretical basis for the subsequent engineering application of detecting the channel status of WIA-FA.