NDLI: Design of signal conditioning circuits for impedance detection of milk bacteria

Content Provider	IEEE Xplore Digital Library
Author	Zhen Zhou Jie Wang Yong Qin
Copyright Year	2011
Description	Author affiliation: Harbin University of Science and Technology, 150080, Hei longjiang China (Zhen Zhou; Jie Wang; Yong Qin)
Abstract	The impedance method detection of milk bacteria requires a high quality signal. In order to meet the requirement, a complete signal conditioning circuit is designed and analysised in this paper. Firstly, Biological signals can be reflected in form of electrical signals by impendance sensor. Secondly, In order to detect weak signals in noises. I have designed Preamplifier circuit, Low-pass filter amplifier circuit, Modulate and Demodulate Circuits. At last, Mathematical models are established after comparison test and the theory analysis. Experimental results show that the signal conditioning circuit can effectively improve SNR, and the sensor output signal can be amplified between 0 and 5V. The system can provide reliable signals for upper computer and display system.
Starting Page	818
Ending Page	821
File Size	107701
Page Count	4
File Format	PDF
ISBN	9781457703980
e-ISBN	9781457703997
DOI	10.1109/IFOST.2011.6021146
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resistors Microorganisms Dairy products detection Low pass filters Noise Bridge circuits Impedance sensors Signal conditioning circuits Impedance
Content Type	Text
Resource Type	Article

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