Infrared radiation characteristic characterization method and device for spherical cone target with uncertain size

The invention provides an infrared radiation characteristic characterization method and device for a spherical cone target with an uncertain size, and the method comprises the steps: carrying out the infrared radiation characteristic characterization of the spherical cone target based on the size distribution characteristics of the spherical cone target under the conditions that the total length and the bottom radius of the spherical cone target meet the normal distribution, and the ball radius meets the average distribution; establishing a size uncertainty probability representation model of the spherical cone target; in the interval range of the given total length and the interval range of the bottom surface radius, traversing the combined sizes of the total length and the bottom surface radius to calculate the infrared radiation intensity of each combined size; and according to the dimension uncertainty probability representation model and the infrared radiation intensity of each combination dimension, est