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Development of a low-power-signal acquisition device for signals lower than 25 Hz


Diploma Thesis, 2012

58 Pages, Grade: 2.0 bzw."B"


Excerpt


Content

1. Assignment

2. Concepts
2.1 Using the sound board of a personal computer
2.2 Using the USB-Interface

3. Low-pass-filter
3.1 Motivation to use a low-pass-filter before digitizing
3.2 Kinds of low-pass-filters
3.3 Development of Butterworth-low-pass filters in general
3.4 Designing a Butterworth low-pass filter of 6th order
3.4.1 Measurement results

4. Digitising and preparation of the signal
4.1 Sampling
4.2 Quantization
4.3 Coding
4.4 Requirements for digitising ELF-signals
4.4.1 Anti-aliasing filter
4.4.2 Sample frequency
4.4.3 Resolution
4.5 Microcontroller and adapting circuits
4.5.1 Sigma-Delta-ADC

5. Data exchange
5.1 The SPI-Bus in general
5.2 Initialization of SPI with the MSP430F2013 microcontroller

6. USB-Interface
6.1 Requirements to transfer the data into the compute
6.2 The IO-Warrior56 (IOW56)
6.2.1 Normal mode function
6.2.2 Special mode function

7. Interaction

8. Power supply

9. Software

10. Appendix
10.1 Circuit diagram
10.2 Board, layout and bill of material
10.3 Used formulaic symbols
10.4 Used equipment
10.5 List of sources

Excerpt out of 58 pages

Details

Title
Development of a low-power-signal acquisition device for signals lower than 25 Hz
College
The Slovak Technical University  (Faculty of electrical engineering and information technology)
Grade
2.0 bzw."B"
Author
Year
2012
Pages
58
Catalog Number
V196879
ISBN (eBook)
9783656230175
ISBN (Book)
9783656231660
File size
2703 KB
Language
English
Notes
Design a signal detection device for detection and digitization of weak signals with frequencies up to 25 Hz before their transmission into a personal computer (PC). The device should contain an input low-pass filter with a cutoff frequency of 25 Hz, a preamplifier, microcontroller MSP430F2013 for digitization and preparation of the digitized signals for transmission into the PC via USB interface.
Keywords
development
Quote paper
Dipl.-Ing. Franz Peter Zantis (Author), 2012, Development of a low-power-signal acquisition device for signals lower than 25 Hz, Munich, GRIN Verlag, https://www.grin.com/document/196879

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