| Measuring bio-function signal is one of the important premises of medical research, making out the life active law of living body and its origination mechanism, it also can help us analysis and study the living body's status. Now many people pay more and more attention to study the blue-chip system of how to acquiring the useful electric and non-electric signal of creature. The apparatus which sampling and processing bio-function signal must have high anti-disturbance ability and can suffice different requirement in different field. So it is very necessary to design this device.In this article a scheme of designing a bio-function experiment system fitting our native college experiments is represented according the analysis of correlative implements in domestic and overseas. This scheme is new in our province.Because of the disturbance of environment and apparatus, the detected signal is very faint and the detection is very difficult. Based on existing device, adopting the new type of trap filter circuit and digital filter circuit decreased the disturbance, the measuring signal met the requirement in the end.The function was fulfilled in some aspects as followed:1 .First, this thesis calculated and designed the signal gained circuit based on the character of the faint and wide-band bio-function signal, then designed both hard and soft filter circuits.2.PIC Micro-controller was used as the control core with its lower-power and lower price. The translating and interfacing circuits was designed as usual.3.A group of analog signal generated by signal generator was adapted to detecting the feasibility of the device through amplification and filter. The analysis was given after this experiment. The analog experiment proofs the feasibility of this apparatus.An effective approach and preliminary attempt about the studying a bio-function experiment system which fitting our conditions was presented in this thesis. One of the aims is to making a valuable reference for further study in thisfield.
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