Detection Ability Mathematical Model and Performance Evaluation Method in Visible-Light Photoelectric Detection System

To enhance the stability of detection ability and the suitability of performance evaluation method in the visible-light photoelectric detection system, this paper sets up a new illumination contrast calculation model based on the optical reflection characteristics of dynamic target with high velocity in remote distance; by the analysis of noise-signal ratio (SNR), establishes a new contrast noise signal ratio (CSNR) mathematical model, derives scientifically the expression of detector output signal amplitude, which is direct proportion to detection ability; proposes the reasonably performance evaluation method of visible-light photoelectric detection system by utilizing fuzzy comprehensive evaluation method and analytic hierarchy process. Through the calculation and testing analysis, the change of output signal amplitude was discussed under different key factors, including background illumination, detection distance, relative aperture, and reflectance, the results show that those factors have important influence on the detection ability; with the increase of target reflectance, the illumination contrast has obvious enhancement; the SNR also increases with the increment of the relative aperture in a certain detection distance.