Skillington, Robert George (2013) DSP based lock-in amplifier. [USQ Project]
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Abstract
This project aims to test the feasibility of, and identify key specifications for a small stand-alone lock-in amplifier using an embedded device. This may be used in conjunction with sensors generating a small signal and used in high noise environments. The intention is that this form of implementation will drastically reduce the cost and size of a lock-in amplifier while maintaining sufficient accuracy and noise immunity.
The specification for this project on 'DSP-Based Lock-in Amplifier' was developed and agreed on with the Faculty of Health, Engineering & Sciences.
For speed, cost and other considerations, computer simulations of microprocessor hardware components were used in this project.
A Dual-phase lock-in amplifier was specifically chosen and examined for this project so as to minimise the component count of future hardware implementations.
Specifications identified as key parameters were ADC resolution, ADC sample frequency and integration time for hardware implementation. The specifications determined by this project are within the specifications of current microprocessors and DSP’s.
Recommendations were made for possible future study.
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Statistics for this ePrint Item |
| Item Type: | USQ Project |
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| Item Status: | Live Archive |
| Faculty/School / Institute/Centre: | Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021) |
| Supervisors: | Leis, John |
| Date Deposited: | 06 Mar 2014 06:14 |
| Last Modified: | 06 Mar 2014 06:14 |
| Uncontrolled Keywords: | feasibility; specifications; dsp based; lock-in amplifier |
| Fields of Research (2008): | 09 Engineering > 0906 Electrical and Electronic Engineering > 090603 Industrial Electronics 09 Engineering > 0906 Electrical and Electronic Engineering > 090609 Signal Processing 09 Engineering > 0906 Electrical and Electronic Engineering > 090601 Circuits and Systems |
| Fields of Research (2020): | 40 ENGINEERING > 4009 Electronics, sensors and digital hardware > 400907 Industrial electronics 40 ENGINEERING > 4006 Communications engineering > 400607 Signal processing 40 ENGINEERING > 4008 Electrical engineering > 400801 Circuits and systems |
| URI: | http://sear.unisq.edu.au/id/eprint/24697 |
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