光譜干擾實時校正器的研究
STUDY ON THE REAL-TIME SPECTRAL INTERFERENCE CORRECTOR
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摘要: 復(fù)雜的光譜干擾限制了ICP-AES分析技術(shù)的進一步發(fā)展。最近提出的一些光譜干擾校正算法都因運算量大,而難以在一般微機上實時運行。本文基于算法和處理速度的綜合考慮,采用VLSI數(shù)字信號處理器(DSP芯片)構(gòu)成光譜干擾校正硬件與Shen Lansun(沈蘭蓀)等人(1989)提出的算法相結(jié)合,初步實現(xiàn)了對ICP-AES光譜干擾的實時校正,從而為光譜干擾實時校正的研究開辟了一條新路。
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關(guān)鍵詞:
- 原子發(fā)射光譜; 光譜干擾; 退卷積
Abstract: The inductively coupled plasma-atomic emission spectroscopy (ICPAES) analytic technique is difficult to develop because of its complex spectral interferences. The algorithms for correcting interferences need a large computation, thus the real-time correction is hard to reach on general microcomputer. A spectral interference fast correcting system (SIFCS) is discussed on algorithms and processor performance. The hardware of SIFCS is a TMS32020 signal processing board on IBM-PC I/O channel. The dual-port RAM is deposited in hardware design. The software of SIFCS consists of a correction program based on a new efficient algorithm and a master program on IBM-PC. Experiments show that the interference correction on SIFCS is 50～100 times faster than on IBM-PC7AT, so that the real-time interfer- ence correction is possible. -
林麗霞,沈蘭蓀,曹有江,光譜學(xué)與光譜分析,9(1988)2, 35-38.[2]Geoffrcy C. Allen 等,用最小方差擬合法計算頻譜退卷積,國外分析儀器技術(shù)與應(yīng)用,1989年,第4期,第69-75頁.[3]Shen Lansun, Baimei, Research in ICP-AES Spectral Interferences and Its Correction, Proc. BCEIA-89, Beijing, C29-C30, (1989).[4]宇正武,沈蘭蓀,PC環(huán)境下的TMS32020 DSP系統(tǒng),電子測量與儀器學(xué)報,1989年,第3期,第10-15頁. -
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