Design On Circuit Of Wide Spectrum Recognition System

With the development of laser technology, the weapon measuring distance with multi-wavelength laser and the guided weapon have been equipped, the technology of elector-optical countermeasure has been of more and more importance, and the warning device equipment with laser detection and laser recognition has been increasingly perfect. The wide spectrum recognition system presented here can be employed to quickly detect the wavelength and orientation of pulse laser with wide spectrum and angle of view.This paper introduces mainly the circuit design of the wide spectrum recognition system, include O/E (optical/electrical) converting, A/D (analog/ digital) converting, signal collecting and computer interface. A correlated double sampling method is presented to reduce the effect of resetting noise to spectrum detector (CCD) on circuit design. It is detailedly introduced the function, the operational principle as well as the performance parameters of each portion of the circuit. CPLD technology is employed to integrate digital circuit in CPLD chip, which is of great usage to the miniaturization, stability, noise immunity and on-line modification and upgrade of the system. Followed by the A/D converting and memory buffering in the data sampling system, the signal is transmitted by PCI interface to computer for the display, analysis and processing.The wide spectrum recognition system is designed, debugged and employed to the laser warning device. And the designed circuit satisfies all parameters of the wide spectrum recognition system.