Simulation Of Time Domain Response Of Finite Conductor Based On MAXWELL

Unexploded ordances are ordnance left over during war or other military activities,and these ammunition will not fail for a long time.After the war or other military activities,these areas are gradually developed and utilized.In this process,UXO will have a threat to people's lives and property.In this paper,the use of transient electromagnetic method to detect unexploded ordances has been studied.The specific research includes several parts:Firstly,the basic structure and working principle of the transient electromagnetic method are introduced.The working principle of the transient electromagnetic system is discussed in detail.The the working device,the excitation field source,,the working sequence,and the manifestation and analysis of the detection result of the system have been talked in detail.Secondly,the equivalent dipole model of the unexploded ordances is discussed in detail,and the response characteristics of the general finite conductor under the dipole model are analyzed.The transient response characteristics of the sphere,axisymmetric target body and general target body are compared and analyzed respectively.At the same time,the simulation model of typical finite conductor is established by MAXWELL software.Finally,this paper uses the MAXWELL software to simulate the response of the general finite conductor.By establishing the long straight solenoid model,the time domain response of different targets under different conditions is simulated.By analyzing time domain responses,the law of the target response with its volume,aspect ratio and other changes is illustrated.And provide theoretical basis for further realization of target body response and inversion recognition.