## 1 Introduction  
Since Da-Jiang Innovations (DJI) released the new DJI XP3.1 (a flight control system) [1; 2], its multi-rotor drone has been characterized by hovering, route-planning, its comparative low price, and ease of use [3; 4]. These factors have led to the rapid development of drones in the consumer selfie drone market. At present, they have been adopted all over the world in environmental aerial photography or surveillance. However, under uncontrolled drone flight control, there have been many drone misfortunes, both at home and abroad. News events have included the impact on the navigation area, the impact on famous buildings, and the horror of political figures, and the biggest worry for drones is that people or terrorists may modify them to make them carry dangerous bombs,or use the vehicles themselves as extremely dangerous devices for attacking bombs. Drone potential hazards are an urgent problem [5; 6], so countries have begun to impose strict regulations on drone traffic management, and even implement no-fly rules. The Federal Aviation Administration (FAA), similar authorities of China and Taiwan have all drawn up drone system usage scenarios. Besides, for the sake of preventing and controlling indecent invasions by drones, research into many AUDSs has progressively turned into an international research topic of interest [7; 8; 9]. There are lots of similar approaches of AUDS, such as spoofing attacks, tracing and early warning, detection, defeating, and signal interfering [10; 11]. The scalable effects net warhead invented by the US military launches warheads and throws nets to attack enemy drones, and other anti-UAV technologies developed by scientists. Among them, devices such as radar, satellites, and thermal imaging cameras are used for early warning and detection, which detect the trace of a drone from the ground. Those technologies are to carry out an immediate detection, warning, and tracing of the intruding drone, and provide real-time messages and information support [12; 13; 14; 15]. Destroying intruding drones is another kind of approach, which acquires the location of drones first and then defeats them by using missiles, lasers, or other weapons. An example of this type of approach is a defense system using strong energy laser developed by a Turkish company ASELSAN. Although the attack method has the effect of destruction and intimidation, there is a risk of accidental injury to nearby people if the UAV is shot down. Interfering with communications of an intruding drone by electromagnetic interference methods is effective; however, it also affects the surrounding communications. Thus, the shortcoming is clear--the wireless communications around that area is affected. The quality of life will also be influenced. The scalable effects net warhead is a technique for quickly and accurately delivering a net to a remote target using a projectile. It includes a mesh-containing launcher, an ejection spring, and a releasable ogive. This net warhead can be launched from a suitable barrel using a propellant or compressed gas. The speed and rotation of the warhead will be determined by the diameter of the barrel. When the warhead approaches the target, the electronic control board activates the servo motor and then pulls the central locking plunger to release the ogive. Then, the spring pushes the net to aim at and spread on the target resulting in its capture. There are lots of reports of security issues caused by drone incidents. Lots of incidents reported that terrorists around the world use drones to attack the targets. Thus, there are an increasing market and insistent need for AUDS, which lead to the development of AUDS technologies. However, with limited resources, how to develop AUDS detection technologies for civil purposes is a very important research topic. This research proposes a dual-axis rotary tracing mechanism, which adopts a thermal imaging camera and a full-color camera. With an algorithm of image identification, this device traces and locks a drone.