Research On High Frequency Electromagnetic Induction Current Detection Technology Based On Tunnel Magnetoresistance Effect

As an energetic detonating device,electric explosives are widely used in weapon systems and blasting devices.When electromagnetic energy accumulates on electric explosives,it will cause false detonation of electric explosives at any time,thereby causing immeasurable loss of human property.The advancement of science and technology has conjointly promoted the fast development of magnetic attraction technology.The magnetic attraction house is filled with electromagnetic radiation signals of assorted frequency bands,that poses a large threat to the stable work of pyrotechnic devices.In today’s unmanned combat system,the weapon equipment systems that apply communications,navigation,firepower strikes,etc.will continuously emit electromagnetic waves.Therefore,in order to ensure the safe storage and stable operation of electric explosives,and to ensure their various performance indicators to meet the requirements,it is necessary to ascertain the direct cause of the threat of electric explosives and reduce the loss caused by misfire.First of all,this text in brief analyzes the surroundingsal impact of this harsh operating environment of electrical explosives,and analyzes and compares the results obtained by domestic and foreign analysis on iatrogenic current detection of electrical explosives.Compare ordinarily used electrical explosives detection ways,and analyze the benefits and drawbacks of varied electrical explosives iatrogenic current detection ways.The innovative application of phase-locked amplification detection technology to the research work of induced current detection of electric explosives can effectively reduce the interference of noise.The tunnel magnetoresistive probe is employed for detection to avoid introducing errors and increase the detection results accuracy.Then,the double-ridge waveguide is used to simulate and calibrate the electromagnetic radiation environment.The output knowledge of the tunnel magnetoresistive probe is detected by planning the blending circuit,low-pass filter circuit,differential electronic equipment circuit,and phase-locked electronic equipment circuit.The tunnel magnetoresistive probe is tag to research the detection accuracy of the elicited current and therefore the relationship between the elicited current and therefore the field strength.Finally,through system joint debugging,the safe induced current of electric explosives is predicted,and the mathematical model of induced current based on double ridge waveguide is established.Finally,the detection of radiation frequency in the range of 10KHz-18 GHz is realized,and the detection accuracy of induced current is 0.2mA,Realize the safety performance evaluation of electric explosives.Through the analysis of this text,a non-contact electrical explosive safety performance analysis technique supported phase-locked amplification technology and tunnel magnetoresistance result is provided,which might effectively predict and assess the security performance of military weapons,in order that it is timely discover the defects and deficiencies of the system instrumentation,and supply a powerful guarantee for the security of personnel and instrumentation.