COLLISION DETECTION METHOD BASED ON AUTOMATIC DEPENDENT SURVEILLANCE-BROADCAST (ADS-B)

The present disclosure provides a collision detection method based on automatic dependent surveillance-broadcast (ADS-B). The method sequentially includes the following steps: establishing a three-layer sphere protection zone, where the three-layer sphere protection zone is centered on an ownship and includes a conflict area (CAZ), a protected area (PAZ) and a surveillance area (SAZ) from the inside to the outside; acquiring flight data of the ownship and an intruder; analyzing flight trends, ending collision analysis if the two aircraft are flying far away or flying relatively stationary, or proceeding to the next step if the two aircraft are flying close, determining whether there is a risk of collision between the ownship and the intruder based on a horizontal heading position relationship and a heading angle, and proceeding to the next step if there is a risk of collision, and constructing flight trajectory formulas based on the flight data of the two aircraft at a previous time and at a present time, calculating a distance of closest approach (DCA) between the two aircraft, determining that the two aircraft are not possible to collide if the DCA is greater than a radius of the CAZ of the ownship, otherwise determining that there is a risk of collision between the two aircraft. The new method has a short detection period and can improve the detection accuracy.