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Target detection radiation characteristic modeling and calculation method in air‐ground rotary scanning optical imaging system

For the moving state of armored vehicle, the random rendezvous of rotary scanning optical imaging system and armored vehicle will be in an uncertain state, which makes the target information detected by the system floated and the reliable target signal hardly obtain. In this article, the target detection radiation characteristic distribution of the system and the calculation method of the geometric parameters of optical scanning in the random rendezvous state are obtained. An optical scanning detection calculation method for air‐ground armored targets is presented under space‐time correlation condition. According to the characteristic of rotary scanning optical imaging system caused by the thermal radiation of armored vehicles, a model of infrared radiation characteristic distribution of armored vehicles is established form the relationship between the system and armored targets. Combining with the established air‐ground rotation optical imaging‐scanning model, the contribution of Infrared Radiation to the optical imaging sensor during the movement of armored vehicles in different states and the calculation function of the output signal of the sensor are given respectively. Through calculation and experiment, it is found that the armored targets can be effectively detected within detection zone that the detection height is less than 35 m, the area of the radiation characteristic area is more than 1 m2 and the detection angle is 20 °  : 40°. The moving direction and contour size of the target can be distinguished by the rendezvous angle difference and the response time of the signal response time of the central.