本研究目的旨在自行設計一多通道電阻抗分析儀，主要由電阻抗分析儀與多通道轉換控制模組所組成，能夠同時執行多項測試，除能減少測試所需的時間外，更能降低測驗設備的成本，以達到多功能量測平台的宗旨。 在系統驗證時，係以分析葡萄糖濃度變化作為標的，經過測試，本系統已能夠透過測試端，將葡萄糖與葡萄糖氧化脢在發生化學反應時所產生的的電流 ，轉換為電壓輸出，證明本系統能奏效。為能擴充本系統功能，本研究透過修改LabVIEW程式與內部電路微調後，已將測試對象擴充至光學電流訊號量測，藉由光柵盤改變雷射光不同光線通過頻率，改變電流通過光電晶片的時間，量測光電晶片已達20KHz的響應頻率。 經由以上兩個實驗說明，多通道電阻抗分析儀可以量測0.1μA以下之微小電流變化，且由搭配電路的低頻濾波器最高可以提供至100KHz以下的訊號量測。 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.
