Study On Multispectral Compound Detecting Instantaneous Target

During the research of bullet weapon system’s design and shaping, it is necessary to test kinds of interior and exterior ballistic parameters. In order to get these parameters, it should use a variety of testing equipment. However, all test equipment needs to be triggered in synchronous for more accurate data. In order to get such synchronized trigger signal, it needs to capture muzzle flame at the moment of bullet getting out from the chamber. In the past, the way to capture the muzzle flame is single spectrum photoelectric detection method. This kind of method is simple in design, however, when the detection range is larger, only using single spectrum detection cannot meet the needs of signal-to-noise ratio and other technical parameters.In order to be able to detect the muzzle flame over a long distance, this paper chose the muzzle flame as the research object and analyzed the physical characteristics of flame targets. According to the spectral characteristics and frequency characteristics of flame targets, this paper proposed Infrared-ultraviolet composite detection principle, and designed the corresponding composite detection algorithm. This paper analyzed the detecting ability of the system from some factors including different environment, incidence angle in optical system, etc, and proposed a new method for transient target signal detection based on the finite element. In order to improve the detection performance and reliability of the detection system, dividing the energy of the flame radiation in the infrared detection system into finite element. The paper researched the energy distribution in every unit of the flame in the detection system and the calculation method for flame radiation to Infrared photo detectors’photosensitive surface in the optical field. A target detection model was established based on the limited source of infrared target. This paper deduced the calculation formula of output signal of infrared flame detection system. In order to satisfy the quest of real time signal processing to flame and achieve visual real-time target function, this paper designed a signal processing and control circuit with the ARM embedded processor as the core. The function of remote detection and visual targeting was obtained by using a telescopic optical system and lots of spectral unit.Through simulating and testing the relationship between parameters in the model and target detection features, the test results show that the simulation results are consistent with experimental data and verify the correction of target detection model.