Ccd-based Ultraviolet Corona Detection System Hardware Circuit Design

Ultraviolet technology of detecting is playing a more and more important role in the field of military affairs and civil application in modern society. The main purpose for electric power department is to examine the corona discharge. To detect the position and intensity of corona discharge in time is significant for the steady going of electric power system and the decrease of facilities' destruction.Normal corona camera can't detect the activity of corona effectively in the daytime. The hardware circuit based on ultraviolet CCD is designed. Apply this hardware circuit to ultraviolet corona detecting system can avoid the influence of solar radiation and detect the corona discharge effectively without image warp.According to the principle of CCD180-512-SFT, a new approach using filed programmable gate array (FPGA) to achieve the schedule circuit is presented. All kinds of noise of CCD are analyzed, and how to eliminate it is introduced. According to the characteristic of KTC noise, the correlated double sampling circuit is particularly analyzed. CCD video signal processing circuits are designed independently, such as front amplifier, output amplifier, clam amplifier, A/D and FIFO. FIFO is built from embedded M4K memory blocks of Altera Cyclone II device-EP2C35F484C6. The CCD video processing circuits are high reliable. Finally, some advice is given for the design according to the deficiency.