FPGA-Accelerated Distributed Sensing System for Real-Time Industrial Laser Absorption Spectroscopy Tomography at Kilo-Hertz
FPGA-Accelerated Distributed Sensing System for Real-Time Industrial Laser Absorption Spectroscopy Tomography at Kilo-Hertz
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DOI：
10.1109/tii.2023.3292971
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发表时间：
2024-02
影响因子：
12.3
通讯作者：
Jiangnan Xia;Godwin Enemali;Rui Zhang;Yale Fu;H. McCann;Bin Zhou;Chang Liu
中科院分区：
文献类型：
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作者：
Jiangnan Xia;Godwin Enemali;Rui Zhang;Yale Fu;H. McCann;Bin Zhou;Chang Liu
利用激光吸收光谱层析成像技术实现工业过程热物性参数的高速、高保真测量，需要具有良好光谱信息的快速、连续数据采集(DAQ)。然而，最先进的DAQ系统面临着以下问题：由于数据吞吐量非常高，无法实时收集原始光谱数据；当实施过多的片上降采样以减少数据吞吐量时，频谱完整性下降。在本文中，我们设计了一个星型组网的可重构数据采集系统，用于千赫帧速率的实时成像。该DAQ系统嵌入了一种新的现场可编程门阵列(现场可编程门阵列)加速数字锁定技术，从而实现了级联积分梳状(CIC)滤波器，用于对具有良好维护的光谱信息的原始信号进行下采样。此外，还开发了定制的数据封装协议，以实现前端DAQ集线器和后端处理器之间的实时数据通信的连续性。开发的DAQ系统的性能通过1 kHz的火焰温度成像进行了实验验证，提供了必要的时间分辨率来穿透湍流和相关的工业过程，如反应传播。
Fast and continuous data acquisition (DAQ) with well resolved spectral information is essential for high-speed and high-fidelity measurement of thermophysical parameters of industrial processes using laser absorption spectroscopy tomography (LAST). However, the state-of-the-art DAQ systems suffer: inability to collect raw spectral data in real-time due to the very high data throughput; degradation of spectral integrity when excessive on-chip down-sampling is implemented to reduce data throughput. In this article, we designed a star-networked and reconfigurable DAQ system for real-time LAST imaging at kilo-Hz frame rate. The DAQ system is embedded with a new field programmable gate array (FPGA)-accelerated digital lock-in technique, whereby a cascaded integrator-comb (CIC) filter is implemented for down-sampling of the raw signal with well-maintained spectral information. Furthermore, a customized data-encapsulation protocol is developed to enable continuity of real-time data communication between the front-end DAQ hubs and back-end processor. Performance of the developed DAQ system is experimentally validated by flame temperature imaging at 1 kHz, providing the necessary temporal resolution to penetrate turbulent flow and related industrial processes such as reaction propagation.