OJAppS  Vol.2 No.4 , December 2012
Development of a Double-Channel Medical Signal Generator Based on STM32 with High Performance
ABSTRACT
An open-ended and multifunctional double-channel signal generator, which based on a 32 bits monolithic integrated microcomputer, highly integrated device and LCD, is introduced in this paper. The instrument is composed of micro-computer STM32F103RD and some integrated chips (IC), which includes programmable waveform generators-AD9833 with highly frequency and phase precision. As a result, this signal generator may output not only double channels accurate sine, square or triangle waveforms with digital-controlled frequency and phase at the same time, but also many kinds of physiological signals that can be modified by USB connection with well open property. Therefore, it is convenient to measure and teach about hearing, research and study on frequency characteristic of human ear and impedance characteristic of human body in medical science. In addition, it is also very easy in experiment and research of college and medical physics for using double channels sine signal to show synthesis of two simple harmonic vibrations under different frequency, phase difference and direction, such as beat pattern and Lissajous figures. Thus it has many merits, such as the small volume, stable property, simple operation, visual display and so on. Consequently, it can be widely used in researching, teaching, debugging and maintaining.

Cite this paper
L. Chen, G. Liu, B. Gao, P. Chen and X. Xiong, "Development of a Double-Channel Medical Signal Generator Based on STM32 with High Performance," Open Journal of Applied Sciences, Vol. 2 No. 4, 2012, pp. 272-276. doi: 10.4236/ojapps.2012.24040.
References
[1]   E. Z. Gong and P. Gan, “Mmedical Physics,” 2nd Edition, Science Press, Beijing, 2004.

[2]   D. W. Kim, H. S. Kim, D. H. Lee, et al., “Importance of Skin Resistance in the Reverse Iontophresis—Based Non-Invasive Glucose Monitoring System,” Proceedings of the 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, San Francisco, 1-5 September 2004, pp. 2434-2437.

[3]   http://wvshare.com/datasheet/ST_PDF/STM32F103xC-xD-xE.PDF

[4]   http://www.analog.com/static/imported-files/data_sheets/AD9833.pdf

[5]   G. L. Liu, L. Q. Liao and J. P. Shi, “Programmable Waveform Generator AD9833 and Its Application,” International Electronic Elements, Vol. 14, No. 6, 2006, pp. 44-47.

[6]   M. C. Lu, J. R. Sun and J. C. Wu, “Application and Design of Signal Generator Based on DDS Chip,” Journal of Tianjin Normal University (Natural Science Edition), Vol. 28, No. 4, 2008, pp. 66-68.

[7]   L. C. Chen, G. Q. Liu and Y. T. Liu, “Design and Application of System for Generating Physiological Signal Data,” Chinese Journal of Medical Physics, Vol. 24, No. 2, 2007, pp. 143-146.

 
 
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