IMPEDANCE MEASURING SYSTEM BASED ON A DSPIC
Abstract
This paper describes a device based on a dsPIC (Digital Signal Peripheral Interface Controller) as a processing unit, capable of making impedance measurements at multiple frequencies. A DDS (Direct Digital Synthesizer) stimulates the measurement circuit composed by the reference impedance and the unknown impedance. The voltages across the impedances are amplified by programmable gain instrumentation amplifiers and then digitized by analog to digital converters. To measure the impedance, a seven-parameter sine-fitting algorithm is used to estimate the sine signals parameters. The dsPIC is connected through RS-232 or USB to a computer where the user can view the measurement results. The device also contains an LCD.
Event details
- Event
- Instrumentation for the Information and Communication Technology Era
- Technical Committee
- TC4
- Place
- Kosice, SLOVAKIA
- Time
- 8 September 2010 - 10 September 2010
- Website
- http://www.imeko.tuke.sk