Design of a Portable Low-Cost Impedance Analyzer

Impedance analyzers available in the market are mostly bulky and often very expensive. In this paper, a low-cost, portable impedance analyzer is designed and implemented. The design utilizes the well-known, impedance network analyzer chip AD5933 and is capable of measuring a spectrum of impedances in the range 5 Hz to 100 kHz from 10 Ω to 100 kΩ. Its specifications allow it to be used in agriculture for monitoring the bio-impedance of fruits in different stages of their lives, especially during the growth period while maintaining low-cost.

[1]  Ahmed S. Elwakil,et al.  Extracting the parameters of the single-dispersion Cole bioimpedance model using a magnitude-only method , 2015, Comput. Electron. Agric..

[2]  Mitar Simic,et al.  Realization of Complex Impedance Measurement System Based on the Integrated Circuit AD5933 , 2013, 2013 21st Telecommunications Forum Telfor (TELFOR).

[3]  E. Barsoukov,et al.  Impedance spectroscopy : theory, experiment, and applications , 2005 .

[4]  Anu Väinölä,et al.  Impedance Spectroscopy in Frost Hardiness Evaluation of Rhododendron Leaves , 2000 .

[5]  C. Correia,et al.  Early detection and monitoring of plant diseases by Bioelectric Impedance Spectroscopy , 2012, 2012 IEEE 2nd Portuguese Meeting in Bioengineering (ENBENG).

[6]  Andreas Demosthenous,et al.  Wideband Fully-Programmable Dual-Mode CMOS Analogue Front-End for Electrical Impedance Spectroscopy , 2016, Sensors.

[7]  Brent Maundy,et al.  Electrode location impact on cole-impedance parameters using magnitude-only measurements , 2016, 2016 IEEE 59th International Midwest Symposium on Circuits and Systems (MWSCAS).

[8]  Cristian-Gyozo Haba,et al.  Wearable impedance analyzer based on AD5933 , 2014, 2014 International Conference and Exposition on Electrical and Power Engineering (EPE).

[9]  K. Cole,et al.  Dispersion and Absorption in Dielectrics I. Alternating Current Characteristics , 1941 .

[10]  Samsuzana Abd Aziz,et al.  Impedance analysis of Labisia pumila plant water status , 2015 .

[11]  Jerzy Hoja,et al.  A family of new generation miniaturized impedance analyzers for technical object diagnostics , 2013 .

[12]  Tomasz Piasecki,et al.  Simple Wide Frequency Range Impedance Meter Based on AD5933 Integrated Circuit , 2015 .

[13]  Ahmed S. Elwakil,et al.  Cole impedance extractions from the step-response of a current excited fruit sample , 2013 .

[14]  K. Cole,et al.  Dispersion and Absorption in Dielectrics II. Direct Current Characteristics , 1942 .