Applied Research Of Infrared Vision Detection Technology And Digital Signal Processor In Ship Navaid In Inland

Based on the characters of inland ship, the disadvantage of its navigation equipment as well as the characters of infrared pictures, the present paper is trying to find out the navigation aids system by the combination of Digital Signal Processor DSP and infrared picture, which aims to check out the dangers that threatened the ship, and then give warnings to the ship operator through displaying of the indicator and alarming clock. The system is especially suitable for the the bad weather considered by uaual ship navigation aids and navigation equipment, e.g. fogs. What's more, it completed direct visual information for radar and GSP and fused with other data detection system, which give more reliable sailing information. Besides, it not only runs fast and timely, but also owns the characters of flexibility and great adaptation. Finally, it possesses perfect anti-disturbance ability by the using of anti-disturbance technology of high-velocity-electron system.The present paper is focused on the target detection. Using visual attention of human for reference, it sets the approximate area and then focus on the detection of them. To be more exact, filtering and sharpening the photos first, and then measuring the water-land line. For the methods of measuring water-land line, after compared the two methods, we determined where the water-land line by using of Sobel's method considering simply and practically. On the other hand, according to the principle of middle distance from the surface form into the photos, we are sure that area for target detection is from the line 30 of the water-land line to M-10( M refers to the line of photos). After the analysis and comparison of several target detection methods, we can get to the target detection by means of combination of edge, texture and energy.Hardware system designing employs modularization method, as well as the parallel pipeline-line system technology by the high performance DSP TMS320C6416 of TI company. The video output and input block adopted Philips SAA7111A to finish decoding. SAA7105 encode.Initializing the video encode and decode machine by the using of single chip general IO port to imitate I2C trunk. FIFO is used for data cache.RAM in FPGA is also employed in production-line system for filtering and sharpening photos.By crossing EMIF, DSP extended FLASH, SDRAM and FIFO accumulator and then realized data gathering and transfer by means of EDM. In order to make sure that the data gathering, transferring and displaying at the same time, our system adopted the data frame management method in three frame buffering measures. On the basis of the data between man-machine ports received by single ship machine, it communicates with DSP through HPI and controls the position of the characters and superimposed characters produced by video superimposed slug.According to the requirements of the system, we should design a two-way power source,a resetting monitoring circuit and the high speed anti-disturbance design.