Air-Ground Rotary Scanning Imaging System for Ground Vehicles Based on Passive Infrared Detection

Abstract

Abstract General target detection system is based on active detection method, which is usually of poor concealment and bulky. In order to improve the concealment and dexterity of airborne detection, an airborne infrared scanning imaging system for ground vehicles based on passive infrared detection is proposed. Under the condition of guaranteeing the minimum effective detection interval, a rotary scanning dynamic detection model is established based on the principle of single-point passive infrared detection, and the relationships between the detection distance, the rotating angular velocity, the scanning angle, the relative motion velocity and the size of detection area are obtained. According to the expression of infrared characteristic of ground vehicles, the relationship between the response voltage of radiation signal and the relationships among the detection distance is obtained. Based on the projection distribution of the infrared feature area received by the infrared detector, the signal response expression including the size information of the target is obtained at a certain rotating angular velocity. Finally, through simulation and experiment, the system can effectively acquire the signal intensity and signal response width information in the infrared feature area of ground vehicles between the detection distance of 5.4 m and 33.4 m, which verifies the effectiveness of the system.