| 摘要 |
PURPOSE:To obtain quickly and accurately a peak area by performing the smooth recording approximate to the record of the real analyser output and at the same time recording a mark at the real peak start point to draw an analog waveform containing the peak start mark. CONSTITUTION:A peak-shaped analog signal which is analyzed by an analyzer 1 of a gas chromatograph, etc. is converted into a digital signal every fixed period of time by an A/D converter 2. This digital signal is supplied to a microcomputer 3 via a bus line 9. The computer 3 averages the digital signal every units set previously by a keyboard 4 and always stores (n) units of the latest average data to an RAM7 while shifting them one by one every time the next data is obtained. At the same time, the computer 3 rewrites the flag corresponding to the averaged data. Then the peak value is momentarily detected from the signal slope to detect a point having an angle larger than the set value. A mark is recorded at the real peak start point, and an analog waveform containing the peak start mark is drawn. Thus a peak area is easily obtained. |
