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    METHOD AND APPARATUS FOR DIGITALLY BASED HIGH SPEED X-RAY SPECTROMETER
    5.
    发明公开
    METHOD AND APPARATUS FOR DIGITALLY BASED HIGH SPEED X-RAY SPECTROMETER 失效
    方法和设备高速数字X射线谱仪

    公开(公告)号：EP0880821A4

    公开(公告)日：2000-03-01

    申请号：EP96928138

    申请日：1996-08-09

    申请人： WARBURTON WILLIAM K

    发明人： WARBURTON WILLIAM K ,  ZHOU CARL ,  HUBBARD BRADLEY

    IPC分类号： G01T1/17 ,  G01T1/36 ,  G06F17/40 ,  H03F1/26 ,  G01R19/04 ,  G05B23/02 ,  G06F17/00 ,  G06G7/12 ,  H04B15/00

    CPC分类号： G01T1/171

    摘要： A high speed signal processing system accepts input data from a detector-preamplifier (20) and produces a spectral analysis of the x-rays illuminating the detector. The system achieves high throughputs at low cost by dividing the required digital processing steps between a "hardwired" processor implemented in combinatorial digital logic (25), which detects the presence of x-ray signals in the digitized data stream and extracts filtered estimates of their amplitudes, and a programmable digital signal processing computer (28), which refines the filtered amplitude estimates and binds them to produce the desired spectral analysis. The hardwired processor has two parallel processing channels: a slow channel, which filters the data stream with a long time constant triangular filter for good energy resolution; and a fast channel which filters the data stream with a short time constant triangular filter, detects x-ray events, inspects for pileups, and captures peak values from the slow channel for good events.