无相移滤波技术用于分析化学信号处理

Application of Zero Phase Shifting Filter Technology in Analytical Chemical Signal Process

把无相移滤波技术引入了分析化学信号处理领域。其方法为:先将输入序列按顺序滤波,然后将所得结果逆转后反向通过滤波器,再将所得结果逆转后输出。通过对色谱信号的实验研究表明,与普通的数字滤波方法相比较,无相移滤波不但具有普通数字滤波的优点,而且不会产生滤波前后的相位偏移,具有良好的应用前景,尤其对于需要准确计算保留时间的场合,用此预处理方法非常适合。

The zero phase shifting filter technology was introduced to the field of analytical chemical signal process. The method is that, first the input serial pass a designed filter, then reverse the filtered signal and pass the filter again, at last, reverse the second filtered signal. A simulate experiment was carried out using the method, comparing to the normal digital filter technology, results show that the method has no phase shifting between input signal and output＇s. The conclusion was obtained that the zero phase shifting filter technology is better than the normal＇s in the field of analytical chemical signal process.