| Summary: | 碩士 === 淡江大學 === 機械與機電工程學系碩士班 === 98 === The purpose of this study was to design a multi-channel electrical impedance analyzer. Mainly composed by the impedance analyzer and multi-channel conversion control module. It can implement a number of tests simultaneously. In addition to reduce test time, it can also reduce the cost of test equipment to achieve the multi-function measurement.
In the system validation, It''s based on analysis of glucose concentration as the subject. For the erection of blood glucose test specimens no signal output, it has proved that this system can function. In order to expand the functionality of the system, this study by modifying the LabVIEW program and fine-tuning the internal circuit, the test object has been expanded to measure the optical current signal. Through the grating to change the laser light through different frequency, change the current time through the optical chip, the chip has reached the measurement optical response frequency of 20KHz.
From these two experiments show that multi-channel electrical impedance analyzer can measure small current changes below 0.1μA. And by the low-frequency filter circuit with the highest offer to the 100KHz signal under measurement.
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