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 EPE  Vol.5 No.4 B , July 2013
Amalgamated-signal Cymometer Based on TMS320F28335
Z. Y. Xu*, W. T. Lv, Z. Y. Li
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Abstract: In our design, an amalgamated-signal cymometer is developed with a TMS320F28335 DSP chip ---- we use its on-chip 12-bit 16-channel AD to conduct a novel dual-sequencer synchronize sampling and averaged to improve the accuracy. Considering the algorithm, we use TI's C28x_FPU_Lib to conduct a FFT with sampled results and correct spectrum with Time-Shift Phase Difference Correcting Spectrum Method based on all-phase spectral analysis. Namely, we design a sampling-frequency self-adaption algorithm which makes operation keep on without outside-hardware command. Actually, the test result shows that our design's frequency resolution ratio is up to 0.4%, and the maximum frequency’s D-value between main and minor signal is up to 29.99 kHz.
Keywords: Digital Frequency Meter; Same Precision Measurement; DSP; All-phase Spectral Analysis; Sampling-frequency Self-adaption
Cite this paper: Z. Xu, W. Lv and Z. Li, "Amalgamated-signal Cymometer Based on TMS320F28335," Energy and Power Engineering, Vol. 5 No. 4, 2013, pp. 1226-1229. doi: 10.4236/epe.2013.54B232.
References

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