2 results about "Rogowski coil" patented technology

The invention discloses a multi-channel lightning current information acquisition board card. An analog lightning current signal acquired by taking a Rogowski coil as a sensor is converted into a digital signal, the digital signal is transmitted to an FPFA in real time, the high-speed data processing capacity of the FPGA is utilized, an edge triggering and amplitude limiting comparison technologyare adopted, a triggering threshold is reduced, meanwhile, line clutter interference is filtered out, and the lightning current signal is precisely determined; an annular queue storing and sending technology is adopted for delayed output of the digital signal, loss of wave front data in lightning current information is avoided, and complete lightning current waveforms generated in each return stroke discharging process are truly restored. The multi-channel lightning current information acquisition circuit adopts a board card level design development mode, a lightning current acquisition boardcard can be additionally arranged according to the actual situation of a site, and then the number of monitoring channels is further increased, meanwhile, the multi-channel lightning current acquisition board card can serve as maintainable unit and can be replaced at any time, the maintenance time is shortened, and the maintainability of the system is improved.