Optical Digital Target Research Based on High-Speed CCD-range

Abstract

The relevance of the development and research is justified by the need to control the production of small arms, including the accuracy of firing. It is proposed to rely on digital targets based on publicly available components. The requirements for optical digital electronic targets of three classes of purpose (supersonic, transonic and subsonic) are described, the structure is designed and standard optical and digital components for the target of supersonic small arms accuracy control are selected. The target operation principle is based on the intersection of the object and the optical plane with the creation of a "shadow" on a high-speed CCD-range and fixing its coordinates. As a result of research, the control unit of the high-speed CCD line was configured TSL1401CL based on the MCU STM32F4 (through direct memory access and three timers, as well as a cascade circuit for switching ADC units) on the target model (with the only coordinate). Normalization of data received from CCD due to uneven brightness of optical system is introduced. A mathematical model based on regression equations compensating nonlinear distortions introduced by the target optical part is suggested. Procedure for alignment (adjustment of optical part) and calibration (adjustment of digital units) of the target is developed. Tests of the target model showed the possibility of application of the proposed design scheme based on publicly available optical and digital components with scaling capabilities. The error in coordinate determinationwas 0.143 cm (rms dev). It is necessary to constantly expand the possibilities of production automation, increase the efficiency and safety of small arms control operations, reduce its cost, and, therefore, increase the competitiveness of electronic digital targets.