The Design of Resolution Improvement Based on TKIS-I Helmet-mounted Colorful Imaging Sonar

摘要

TKIS-I is a helmet-mounted single-beam mechanically scanned color imaging sonar with a working frequency of 678KHz, the beam width of 2.2°, and a maximum detection distance of 100m. It can be carried by a single soldier to complete the operation. It is mainly used for underwater salvage, search and rescue, etc. It has been used in naval forces and has been widely recognized. TKIS-I helmet-mounted colorful imaging sonar has a lower angular resolution effect on close-range targets, and cannot distinguish between close range targets. In this paper, FPGA is added on the basis of the system circuit of TKIS-I helmet-mounted colorful imaging sonar to process high-speed signal, which makes the system work at a frequency of 2. 25MHz. It can effectively improves the angular resolution of close-range underwater targets and enhances the signal strength of target objects. Finally, the imaging test was performed on the 2.25Mhz high-frequency imaging sonar system. From the comparison results, it can be concluded that the angular resolution of the target object has been enhanced.