工业总线标准电容层析成像系统设计

发布时间：2018-03-09 16:31

本文选题：电容层析成像(ECT)　切入点：多相流参数测试　出处：《北京航空航天大学学报》2017年11期 　论文类型：期刊论文

【摘要】：为保证电容层析成像(ECT)系统满足航空航天领域多相流参数测试的要求,开发了一套基于CPCI工业总线标准的ECT系统。采用高性能现场可编程门阵列(FPGA)芯片作为主控芯片,实现信号激励模块、多路复用开关模块、数据处理模块、数据解调和传输模块的集成式设计,将采集信号进行预处理,实现信号的滤波、放大和相敏解调,并通过CPCI工业总线接口把解调后的电容数据传送至系统上位机,完成图像重建。实验测试结果表明:系统采用1 MHz激励信号和8电极传感器的工作模式下,采用10周期的测试信号解调时,图像采集速度可达1 785幅/s,信号的信噪比高于60 d B,成像结果具有良好的空间分辨率。
[Abstract]:In order to ensure that the capacitance tomography (ECT) system meets the requirements of multiphase flow parameter testing in aerospace field, a set of ECT system based on CPCI industrial bus standard is developed. The high performance field programmable gate array (FPGA) chip is used as the main control chip. The integrated design of signal excitation module, multiplexing switch module, data processing module, data demodulation and transmission module is realized. The signal is preprocessed to realize signal filtering, amplifying and phase sensitive demodulation. The demodulated capacitance data is transmitted to the upper computer of the system through the CPCI industrial bus interface to complete the image reconstruction. The experimental results show that the system uses 1 MHz excitation signal and 8 electrode sensor to work in the mode. When demodulated with 10 cycles of test signal, the image acquisition speed can reach 1 785 / s, the signal-to-noise ratio of the signal to noise ratio is higher than 60 dB, and the imaging results have good spatial resolution.
【作者单位】：天津大学电气自动化与信息工程学院天津市过程检测与控制重点实验室;
【基金】：国家自然科学基金(61227006,61473206,6151101270)~~
【分类号】：TP391.41;V219;V419

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