Bhimrao Sheshrao Jadhao, S. D. Ruikar, Walchand College of Engineering, Sangli, India.
DOI : 01.0401/ijaict.2016.07.02
International Journal of Advanced Information and Communication Technology
Received On : June 11, 2019
Revised On : July 15, 2019
Accepted On : August 12, 2019
Published On : September 05, 2019
Volume 06, Issue 09
Pages : 1143-1146
Abstract
The purpose of this paper work is to design and implementation of an embedded system for impedance measurement. This system is design by using the impedance converter integrated circuit AD5933 which gives the real and imaginary value for measuring the impedance. The system combines an on-board frequency generator with build in 12-bit, 1 MSPS, analog-to-digital converter (ADC). There is built in frequency generator allows an external complex impedance to be excited with a known frequency. The response signal from the device testing under test (DUT) is sampled by the on-board ADC and a discrete Fourier transform (DFT) is processed by an on-board DSP engine. The DFT algorithm returns a real (R) and imaginary (I) data word at each output frequency as the real and imaginary register contents, which can be read from the serial I2C interface. The Arduino mega board microcontroller (ATmega2560) maintains control of the AD5933 via the I2C-compliant serial interface protocol. The impedance measurement range is 1KΩ to 10MΩ but we can measure range 1 Ω – 10M Ω is enabled using additional circuitry i.e. AD8606 with reference resistor added to the unknown reactive component and correction of the real part and the phase of the measured impedance. The complex material is connected to the impedance converter IC AD5933 between VOUT and VIN Pin. The system will measure an impedance of DUT which will be displayed on LCD and for future use the impedance data would be stored into the micro SD card as data logger.
Keywords
Arduino mega board, Impedance converter, DSP engine, DFT algorithm, AD5933 and LCD display.
Cite this article
Bhimrao Sheshrao Jadhao, S. D. Ruikar, “Embedded System for Impedance Measurement” INTERNATIONAL JOURNAL OF ADVANCED INFORMATION AND COMMUNICATION TECHNOLOGY, pp.1143-1146, September 05, 2019.
Copyright
© 2019 M. Prashanth, A. Lelinadevi. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.