摘要
为满足光纤传感地震加速度计对实时性、高精度以及网络化的要求,提出了基于ARM和DSP双核微处理器的嵌入式系统设计方案,对3×3耦合器输出的相位已调加速度信号进行解调、频谱分析,并提供了以太网传输控制接口.文中介绍了信号解调原理,给出了关键电路的具体设计及其输出信号的数字信号处理的软硬件实现方法.实验结果表明,该系统在处理精度和实时性方面都能达到要求,性价比高,有一定实用价值.
To satisfy the requirements of fiber-optic sensor accelerometer for real time, high accuracy and net work processing, a design method for embedded temblor accelerator signal processing based on dual-core microprocessor of ARM and DSP is provided. This system realizes the demodulation of phase modulated accelerator signal from the output of 3×3 coupler. Its spectrum is analyzed and an ethernet interface is offered. Principle of signal demodulation is introduced. The key circuits and hardware and software design of signal processing method are described in detail. The experiment results show that this system can reach requirements of processing accuracy and real-time property and is highly cost-efficient and practical.
出处
《天津工业大学学报》
CAS
2008年第4期53-56,共4页
Journal of Tiangong University
基金
国家自然科学基金资助项目(40274047)
