The pulse electromagnetic valve is generated by the explosion of nuclear explosions and non nuclear electromagnetic pulse bombs. The electromagnetic pulse produced by a nuclear explosion is called a nuclear electromagnetic pulse. Any nuclear weapon that explode above the ground produces electromagnetic pulses, which accounts for about one millionth of the total energy of the nuclear explosion, from several hundred hertz to a few megahertz. The non nuclear electromagnetic pulse projectile, by using the energy produced by the explosion or the combustion of chemical fuel, converted into high power microwave radiation through the microwave device, can launch a pulse microwave beam with a peak power above Jiwa and a frequency of 1 gir to 300 gir. The transient voltage of thousands of volts is produced on the exposed conductive body, and a large number of electronic devices are set up. To cause irreparable damage. The electromagnetic pulse protection method is basically the same as the lightning protection method. The shield made of 9.5 mm thick steel plate or 4 mm thick copper plate can provide a high overall shielding effectiveness. However, such shielding will be weakened due to the presence of small holes in the access door and cables, connectors, switches and so on, so that the pores must be sealed with gaskets. If it is necessary to open the hole, the large holes should be divided into many small holes, and the place where the holes and holes are intersected must be fused so as to ensure the best shielding effect. Cables must use integral protective materials. The best cable protection materials are conductive solid materials such as pipes. Appropriate grounding lines are also important in helping to reduce vulnerability. If the data transmission rate is low, the filtering method can be used to suppress the instantaneous effect. If only the filter is not enough to reduce the electromagnetic pulse to a safe level, a protective suppressor, such as a zener diode, is needed.
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