Hardware Design And Implementation Of The Floating Body Of Six Degrees Of Freedom Measurement System

Movement of floating object 6-DOF is an important reference in research of ocean port and ship engineering. The traditional way of measure is to measure the movement with ruler, angle with gyroscope and mark the siginal with light oscillograph. These results are all rely on manual work, and they can not match the requrement of high precision with lots of waste of resources. Untouchable measurement system uses a pair of CCD to capture the graphics, and reconstruct the coordinate with planar photos. It causes no effect to the floating object, and gains a high precision.In measurement system, there are two parts of works, one is the progress of arithmetic, the other is hardwarise of system. The orginal untouchable measurement system capture the graphics with video capture card with PCI bus, and the process of data is on the PC, which causes a long time to run the program, can not match the requrement of real-time. The floating object move ever second, the get up with the contiue capture, a DSP processor is necessary to manipulate the video siginal. A hardwarised measurement system uses FPGA to gather and pre-process the video siginal. After a binary siginal process, the data are send to DSP through DMA, and DSP complete the operation, including reference dots recognization, coordinate reconstruction, 6-DOF.At last, this paper designs and implements some advise to improve the precision.