新型生物声纳导盲系统的设计

New Bio-Sonar Guidance System Design

现有生物声纳导盲系统具有较小的存储空间,较低的数据采集速度、较低的数据传输速度和较低的数据处理能力,针对这些缺陷和不足,从仿生学的角度考虑设计了一种基于FPGA和DSP6000的新型生物声纳导盲系统;该系统采用FPGA仿蝙蝠的嘴巴和耳朵进行仿生声纳信号发射和前端数据采集,同时对采集的回波数据进行一定的预处理;在FPGA内部构造FIFO实现乒乓操作并通过EDMA完成与DSP6000的高速数据传输;DSP6000对所采集数据进行进一步算法处理;最终输出不同频率与强度的音频信号借助于人脑参与信号处理来识别前方探测物;实验证明该系统可以探测前方不明障碍物。

Existing biological sonar guide system has a smaller storage space, the low data acquisition speed, lower data transmission speeds and lower data processing capacity for these shortcomings and deficiencies, considering from the perspective of bionics design a new bio --sonar guide system based on FPGA and DSP6000. The system uses FPGA imitate the bars mouth and ears to transmit bionic sonar signal and acquire front--end data, at the same time make a certain pretreatment for echo data collected. Ping--pong operation in the FPGA inter- nal structure of the FIFO and the DSP6000 of high--speed data transmission by EDMA. The DSP6000 make further algorithmic processing of the data collection. The final output of the audio signals of different frequency and intensity by means of the human brain involved in signal processing to identify the front of the probe material. Experiments show that the system is stable, reliable and easy to use.