Design of optical fiber transmission system of analog signal under microwave drying coal environment
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摘要: 在大功率微波环境下，电信号的传输极易受电磁干扰的影响而损失传输精度。针对该问题，设计了一种微波干燥煤环境下的模拟信号光纤传输系统。该系统基于V/F转换，以光纤为传输通道，FPGA为频率测量计，ARM为数据处理控制器，可以有效抑制电磁干扰和提高传输精度。实验结果表明，该系统抗干扰能力强，传输距离远，稳定性高，且电路结构简单，模拟小信号传输误差小于0.1%,为复杂环境中的模拟信号传输提供了一个优良的解决方案。Abstract: Under high-power microwave environment, transmission of electrical signals could easily be affected by electromagnetic interference and lead to loss of transmission accuracy. In order to solve the problem, an optical fiber transmission system of analog signal under microwave drying coal environment was designed. The system is based on V/F transform, takes optical fiber as transmission channels and uses FPGA as the frequency meter, ARM as data processing controller, can effectively restrain electromagnetic interference and improve transmission accuracy. The experimental results show that the system has advantages of good anti-interference ability, far transmission distance, high stability, simple circuit structure, and transmission error of small analog signal is less than 0.1%. The system provides a good solution for analog signal transmission under complex environment.
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Keywords:
- microwave heating /
- analog signal /
- transmission system /
- optical fiber /
- V/F conversion /
- FPGA
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