Design of High-Speed Data Acquisition System for Fast Line-Scan Spectrometry

The data acquisition system (DAS) is an indispensable part of line-scan spectrometry (LSS), dominating system performance, especially the sampling rate. In response to the demand for high-speed in-situ LSS monitoring, this paper presents a DAS design capable of fast spectra sampling. The system data flow and timing relationships are analyzed, and a special design strategy is proposed. By adopting this strategy, we determine the key parameters like clock frequency and system delay and develop the corresponding DAS prototype. Experiments verify that the prototype device can achieve a high sampling rate of 4 k frames/s and its error-free runtime beyond 16 hours, qualifying it to be applied for monitoring the high dynamic machining process, which proves the effectiveness of our analysis and design strategy.