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Real time correlation filter for optical particle counter

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Abstract

Particle signals are detected by two parallel measuring chains which consist of a detector and analog to digital converter. We have used OPT101 as photodiode and ADS7870 for A/D converter and the output signal from two parallel measuring chains is processed by on line correlation filter. This filter works as real time systems. A correlation algorithm has been applied for this work. The signal to noise ratio has been increased by applying correlation filter. The gain of the filter has been improved by introducing digital signal processing.

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Notes

  1. Texas Instrument: Monolithic Photodiode and single-supply transimpedance amplifier, (1994–2003).

  2. Texas Instruments: ADS7870, Texas Instruments Incorporated, (1990–2005).

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Authors and Affiliations

  1. Department of Applied Physics, Electronics and Communication Engineering, University of Chittagong, Chittagong, 4331, Bangladesh

    Md. Haider Ali Shaim

  2. School of Computer Science and Engineering, University of Information Technology and Sciences, Chittagong, 4225, Bangladesh

    Deepak Kumar Chy

Authors
  1. Md. Haider Ali Shaim
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  2. Deepak Kumar Chy
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Correspondence to Md. Haider Ali Shaim.

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Shaim, M.H.A., Chy, D.K. Real time correlation filter for optical particle counter. Opt Quant Electron 45, 433–448 (2013). https://doi.org/10.1007/s11082-013-9655-7

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  • DOI: https://doi.org/10.1007/s11082-013-9655-7

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