基于DSP和APD的水下激光信号采集系统

摘要

针对水下蓝绿激光传输环境的特殊性,提供了一种基于定点DSP芯片TMS320F2812和APD(雪崩二极管)技术的水下激光发射控制及回波信号采集的系统.给出了系统的总体结构、硬件实现和软件程序设计,其中对APD处理电路和DSP的ADC控制模块做了详细的设计.通过实验测试表明,该系统能够准确地采集水下激光的回波信号,便于后期的水下激光传输特性的研究.%Aiming at the special environment of underwater blue-green laser transmission, a system for the underwater laser emission control and acquisition of the echo signal is proposed, which is based on the high-precision fixed-point DSP chip called TMS320F2812 and avalanche photo diode (APD). The overall structure, hardware implementation and design of software programs are given, including a detailed design scheme of the APD processing circuit and the DSP ADC control module. The relevant experiments show that this system can receive the laser echo signal accurately, and is convenient for the follow-up research on laser underwater transmission characteristics.