Design And Implementation Of Pulse Laser Detection System

With the extensive application of laser rangefinder and laser pointer in the modern life, the laser detection technology has become a hot research topic in domestic among foreign scholars, how to detect weak laser signals, and obtain the related information of the incident laser is a focus for researchers. As an important characteristic of incident laser parameters the incident direction information of the incident laser has become the focus of the research. Based on analyzing the detection principle of all current laser detection system, combining with the qualification of project requirements, a multi-window pulse laser detection method was proposed.Firstly, through analysis and comparison the basic principle and characteristics of domestic and international pulsed laser detection technologies laser detection system, a large detection field, multi-windows, and photodiodes pulse laser detection system was adopted. In order to cover the field of hemisphere, the detectors arrangement way was detailed analysis. And Minimum detection field of view of system was calculated and experiment verification. Then make a deep analysis of the type, performance, noise type and other indicators of detector that can meet the system requirementsOn this basic, the thesis mainly contains the following aspects of work:According to the principle of pulsed laser detection, the overall system design was proposed. Mainly consists:optical signal detection, the weak signal amplification, collection and transmission parts. The Hardware of the system includes signal receiving, signal amplification, level shifting, MCU signal collection, information transmission module,and data processing and interface display module. Finally, using the LED display module visual shows instruct information of the incident laser direction.Under laboratory conditions, detection limit of the technical requirements was simulated. In order to test the system feasibility, such as the laser energy, incident direction and the field divided, were repeating experiment. Finally, draw the conclusion that of the system can effective detect the 850nm,1064nm,1650nm pulsed laser (pulse width 10ns), level distinguish angle 30°, pitch distinguish angle 30°.