The Design And Realization Of Wide-Screen Digital Shooting System

The modern shooting training system is developing towards the goal of high precision and real-time instinct. Compared with traditional method of shooting, the new pattern based on high-speed image process is more safe and practical. Such system definitely involves high-speed digital processor.This context alters and redesigns the former platform based on DM6** of TI and OV**** of OMVISION to meet the client's requirement of wide-screen of 9M×4M and maximum ten trainees operating simultaneously. It maintains the stability and precison with corresponding modifications.The idea in this design provides only one oscillator for two OV**** chips, which makes them work under the same frequency. The two chips are synchronized through start-up and configuration. This guarantees that the image frames are captured at the same time.In order to solve the conflict of sending coordinates in the integrated systems. The corresponding priority is confirmed by the control line added between the two processors, and the waiting-until-the-next-frame method is applied to the system flow.Based on the DSP shooting system, this context describes a infrared-dot gadget, which is considered as the launcher, it gives out the infrared-dot after received both the sync signal emitted and controlled by the DSP and the trigger signal, the launcher is mainly composed with AT8251, which is designed to delay the time slot for each trainee to ensure ten trainees operating at the same time.This contest also modifies the former captured-image disposal procedure, which improves the precision of the shooting result. Additionally, it suggests the auto screen-correction flow and designs corresponding program for re-calculating the threshold in it.At last, it designs the Host Control Board and the Video Control Switcher, and integrated former printed circuit boards into one piece, which make the operation more convenient. The integration also saves the space for the product and reduces the EMI.the practical experiment shows:this digital wide-screen shooting system works stably according to the oscilloscope display of corresponding signals.