This invention provides a UAV defense and interception
system, including a launching unit and a capture unit. The capture unit includes a ferromagnetic
projectile, and the launching unit includes a housing. Inside the housing is a cannon
barrel and a circuit circuit composed of n acceleration coils, n touch switches, n
energy storage capacitors, n timing controllers, n power distribution diodes, and multiple power
continuation diodes. Each acceleration coil also has a front sensor and a rear sensor at its front and rear ends, respectively. Using the technical solution of this invention, the timing controller controls the activation or deactivation of the acceleration coils. When the ferromagnetic
projectile is in the transition phase between two adjacent acceleration coil stages, the preceding acceleration coil is de-energized in time, avoiding the electromagnetic force generated by the preceding acceleration coil from causing a reverse pull effect on the ferromagnetic
projectile and preventing deceleration. This allows the ferromagnetic projectile to continuously accelerate, resulting in advantages such as a large interception range, long interception distance, high interception accuracy, and easy deployment of the interception net in the air.