Lightning Warning Detection Device And Its Ground Calibration Method

As one of the most destructive natural disasters,lightning has caused serious threats to the fields of electronics,power,communications and aviation.The establishment of an effective lightning early warning detection device can effectively guarantee the safety of human life and property.At the national level,countries have gradually established a complete lightning monitoring and positioning network,which can achieve a large-scale early warning of lightning,but for highly mobile individuals and vehicles.There are certain deficiencies in the lightning warning device.First,the general lightning warning device is expensive and bulky,and it is difficult to meet the needs of portable lightning warning for field workers and vehicles.Second,most lightning warning devices need to be fixedly installed to ensure good grounding.It is difficult for field workers and vehicles to ensure the grounding of lightning warning devices.Aiming at the above problems,this paper designs a small-scale,non-grounded portable lightning early warning detection device,which can work in the field environment,and introduces a lightning human-induced interference signal discrimination method in the device,which reduces the artificial signal to lightning detection.Interference.Aiming at the test calibration of lightning warning device,the lightning ground simulation device was designed,and the loop parameter measurement problem during the design of lightning simulation device was solved.The lightning calibration device was tested and tested for lightning early warning detection device.The main contributions and innovations of this paper include:1.A small,non-grounded portable lightning warning device was designed.The lightning energy information is obtained by detecting the magnetic field of the lightning radiation,and the lightning distance is determined according to the lightning energy with the distance attenuation law.Therefore,the device can realize the ungrounded lightning early warning detection.In the device,a method for judging the lightning jamming signal is introduced,which can eliminate the interference of the artificial signal to the lightning detecting device.2.Designed a lightning ground simulation device.By designing the parameters of the lightning simulation device,the device can generate the waveform with the characteristics of the lightning signal,and can generate the lightning simulation signal through the simulation device to test and calibrate the lightning early warning detection device designed in this paper.A non-contact measurement method for capacitive ball gap discharge loop parameters is proposed.Through the combination of discharge modeling and parameter estimation,the non-contact measurement of loop resistance and loop inductance is realized,and the peak value measurement of the generated pulse large current can be realized,and the entire waveform of the pulse large current can be obtained.The parameter measurement problem in the design of lightning simulation device.This paper completed the design of the lightning early warning detection device and completed the calibration test through the designed lightning simulation device.The lightning early warning detection device can realize lightning warning detection within a radius of 40 km,and can be used for lightning warning of field workers and vehicles,such as outdoor sports personnel such as mountain climbing and cycling,and radar vehicles such as field vehicles.