Research Of The Signal Sampling And Processing System For Capillary Electrophoresis Chip

With the development of Miniaturized Total Chemical Analysis System (lab on the chip), capillary electrophoresis chip has grown up step by step. The miniature and the intelligentization of the signal sampling and processing system for the electrophoresis chip has become the key of the miniature and the use of the whole system.Based on the signal characters of the low voltage electrophoresis chip developed by Micro System Center of Chongqing University, the signal sampling and processing system of capillary electrophoresis chip has been developed, which will lay some technique foundation for the low voltage, integrate and portable type of capillary electrophoresis system. This paper focused on the following aspects::(1) The tendency of the analysis instrument, and the research of the signal sampling and processing for capillary electrophoresis have been made, based on the numerous researches works.(2) The characters of the signal for the low voltage electrophoresis chip, signal processing theory such as the Nyquist theory, FFT, FIR filter and the wavelet have been discussed after the learning of low voltage electrophoresis theory and the analyzing of the low voltage electrophoresis chip.(3) The project of signal sampling and processing system for low voltage electrophoresis chip was put forward according to the characters of the low voltage electrophoresis chip and its signal. The structure, hard ware and soft ware of the data collector have been made.(4) The capillary electrophoresis software has been developed. Several digital signal process algorithms (FFT, FIR filter, wavelet) were used in the software with the function of analysis and calculation for the electrophoresis spectrum, and the multithreading was also employed.(5) Such experiment for the signal sampling and processing system of the electrophoresis chip has been executive with primarily satisfying result (6) The problems are put forward for further study.