Anti-interference Lightning Current Recording Module Design

Lightning has become a major public hazard in information technology.The measurement of lightning current characteristic parameters is of great significance for lightning research and lightning protection.Conventional lightning current recording devices have been unable to meet the increasing demand for lightning current monitoring.Conventional devices can only obtain simple parameters such as peak value,polarity,and occurrence time of lightning current,and are susceptible to interference,and erroneously treat noise in the environment.Lightning strikes and recording storage efficiency is low.Aiming at the shortcomings of the traditional lightning current recording device,this thesis designs a lightning current recording device with anti-interference characteristics.While acquiring the lightning current characteristic parameters and reproducing the lightning current waveform,it can also eliminate the noise signal and retain only the real lightning data.Improve the accuracy of lightning current monitoring.The main points of this paper are as follows.1.According to the function and requirements,the overall structure of the hardware part and software of the lightning current recording module are designed and the function of each function module is analyzed.2.Using the redundant design signal conditioning channel,combined with data processing algorithms to achieve anti-interference characteristics of lightning current recording.3.The functional requirements of the lightning current recording module is analyzed,and complete the chip selection of each part of the module according to the requirements,and realize the single channel 20 MSPS sampling rate and the dual channel lightning current waveform storage system with the waveform recording time of up to 100 ms.4.According to the complex working environment of the lightning current recording module,a reliable hardware architecture and various communication interface are designed,which enables stable operation capability and flexible networking capability to realize multi-point real-time lightning monitoring in a large area.Through the research of the above content,a low-cost,portable anti-interference lightning current recording module is designed,which realizes high-precision(12-bit resolution)waveform acquisition,large-time span(100ms)lightning current waveform recording and noise signal rejection.Widely used in wind power,electric power,railway and other industries.