针对机械振动信号中低频小信号不易检测的问题,设计开发了一套基于随机共振理论的嵌入式检测系统.硬件采用"DSP+ARM"的双CPU结构,软件应用Linux操作系统,使系统性能更加稳定.文中给出了仿真结果,验证了系统可以有效地抑制噪声的影响和准确地提取低频微弱信号.
An embedded detection system based on stochastic resonance was developed to solve the problem that low-frequency weak signal was difficult to be detected in mechanical vibration.More stable performance of the system was achieved by the use of "DSP + ARM" dual-CPU structure as the hardware and Linux operating system as the software.The simulated results show that the system can suppress the impact of mechanical noise effectively and obtain low-frequency weak signal accurately.