Determining the Level of Dust on Printed Circuit Boards of Radio-Electronic Equipment by Optoelectronic Method

Abstract

An optoelectronic method for detecting dust deposition on printed circuit boards (PCB) of electronic equipment which can be used to inform about the critical thresholds of dust accumulation is developed with allowance for the humidity index. The proposed method in combination with the developed mathematical model, functioning diagrams, and light beam motion patterns is used to consider a possible construction and block diagram of the algorithm of the control program for the microcontroller of desired implementation of the experimental setup. The principle of operation of the optoelectronic method for detecting dust depositions on printed circuit boards of electronic equipment with allowance for the humidity is following. Light pulses are periodically emitted by two LEDs with a wavelength λ1 = 565 nm (to assess the level of dust deposition) and two LEDs with a wavelength λ2 = 930 nm (to take into account the level of humidity). The reflected signals from the three plates are taken by the photodiode. The first and second plates placed in a sealed enclosure have an artificially deposited maximum level of dust (humidity 10 and 90%, respectively). The third plate is the control. The plates and PCB are made of the same materials. The level of deposited dust (mass concentration per unit area) which triggers the leakage currents between the conductors of the printed circuit board is determined experimentally and depends on the minimum distance between the printed conductors through which the maximum current flows in the given electronic equipment and on the thickness of the dust layer deposited on the conductors at the maximum permissible humidity specified for the equipment.

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REFERENCES

  1. 1

    Astaf’ev, A.V., Okruzhayushchaya sreda i nadezhnost’ radiotekhnicheskoi apparatury (Environment and Reliability of Radio Equipment), Moscow: Energiya, 1965.

  2. 2

    Spravochnik konstruktora REA. Obshchie printsipy konstruirovaniya (Handbook of REE Designer: General Design Principles), Varlamov, R.G., Ed., Moscow: Sovetskoe Radio, 1980.

    Google Scholar 

  3. 3

    Bilibin, K.I., Vlasov, A.I., Zhuravleva, L.V., et al., Konstruktorsko-tekhnologicheskoe proektirovanie elektronnoi apparatury: uchebnik dlya vuzov (Engineering Planning of Electronic Equipment: Manual for Higher Education Institutions), Moscow: Mosk. Gos. Tekh. Univ. im. N.E. Baumana, 2002.

  4. 4

    Spravochnik po elektrotekhnicheskim materialam (Handbook of Electrical Engineering Materials), Koritskii, Yu.V., et al., Eds., in 3 vols., Moscow: Energoatomizdat, 1986, 3rd ed.

  5. 5

    Semenov, V.V., Astsaturov, Yu.G., and Khanzhonkov, Yu.B., A device for detecting dust deposits on printed circuit boards of electronic equipment, Trudy 11-oi Mezhdunarodnoi nauchno-prakticheskoi konferentsii “Issledovanie, razrabotka i primenenie vysokikh tekhnologii v promyshlennosti” (Proc. 11th Int. Sci.-Pract. Conf. “Research, Development and Application of High Technologies in Industry”), St. Petersburg: S.-Peterb. Gos. Politekh. Univ., 2011, pp. 175–176.

  6. 6

    Semenov, V.V., Astsaturov, Yu.G., Khanzhonkov, Yu.B., and Shchanstnyi, D.A., RF Patent 2426982, Byull. Izobret., 2011, no. 23.

  7. 7

    Semenov, V.V. and Medvedev, P.A., RF Patent 2503952, Byull. Izobret., 2014, no. 1.

  8. 8

    Semenov, V.V., Astsaturov, Yu.G., Khanzhonkov, Yu.B., and Medvedev, P.A., RF Patent 2503951, Byull. Izobret., 2014, no. 1.

  9. 9

    Semenov, V.V. and Medvedev, P.A., Development of a device for controlling dust deposition in electronic equipment, Trudy 4 Mezhdunarodnoi nauchnoi konferentsii “Sovremennye problemy radioelektroniki” (Proc. 4th Int. Sci. Conf. “Modern Problems in Radio Electronics”), Rostov-on-Don: Yuzh.-Ross. Gos. Univ. Ekon. Servisa, 2012, pp. 394–397.

  10. 10

    Semenov, V.V. and Medvedev, P.A., Development of a device for controlling dust extraction in electronic equipment, in Aktual’nye problemy tekhniki i tekhnologii (Actual Problems of Equipment and Technology), South-Russian State University of Economics and Service), Shakhty: Yuzh.-Ross. Gos. Univ. Ekon. Servisa, 2012, pp. 84–86.

  11. 11

    Mukhitdinov, M. and Musaev, E., Opticheskie metody i ustroistva kontrolya vlazhnosti (Optical Methods and Devices for Humidity Control), Moscow: Energoatomizdat, 1986.

  12. 12

    Mukhitdinov, M. and Musaev, E., Svetoizluchayushchie diody i ikh primenenie (Light-Emitting Diodes and Their Application), Moscow: Radio i Svyaz, 1988.

  13. 13

    Zelenyuk, I., Continuous evaluation of the reliability of electronic nodes, Elektron.: Nauka. Tekhnol. Biz., 2004, no. 5, pp. 40–42.

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Correspondence to V. V. Semenov.

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Translated by V. Alekseev

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Semenov, V.V., Astsaturov, Y.G. & Khanzhonkov, Y.B. Determining the Level of Dust on Printed Circuit Boards of Radio-Electronic Equipment by Optoelectronic Method. Inorg Mater 56, 1458–1461 (2020). https://doi.org/10.1134/S0020168520150169

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Keywords:

  • printed circuit board
  • electronic equipment
  • optoelectronic method for detecting dust deposition
  • optoelectronic device
  • leakage currents
  • signaling