Suppression of radiated emission in fiscal taxi meter

Hong He; Pei-pei Yang; Xing Su; Da-jian Zhang; Ke-xi Wang; Ming-feng Hou

doi:10.1117/12.903666

15 November 2011 Suppression of radiated emission in fiscal taxi meter

Hong He, Pei-pei Yang, Xing Su, Da-jian Zhang, Ke-xi Wang, Ming-feng Hou

Proceedings Volume 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation; 83210A (2011) https://doi.org/10.1117/12.903666
Event: Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 2011, Yunnan, China

Abstract

This paper is based upon National Standards for EMC. For the problem that the intensity of electromagnetic radiation in the meter with the THG at 36MHz is seriously more than National Standards, by studying the theory of radiation emission and analyzing the formation mechanism of electromagnetic radiation interference, it proposes three restrain measures: 1.the improvement of the Crystal oscillator's grounding measure; 2.adding a RC filter circuit to the Crystal oscillator circuit; 3.the improvement of the tax's communication cable, solving the problem that radiation harassment the taxi meter seriously exceeds. The experimental result demonstrates that the radiation intensity of tax meter improved with the general measures meet the requirements of the national standard, making more than 32000 taxes in Tianjin install this green meter, protecting the safety of staff and normal operation of the surrounding equipment.

Citation Download Citation

Hong He, Pei-pei Yang, Xing Su, Da-jian Zhang, Ke-xi Wang, and Ming-feng Hou "Suppression of radiated emission in fiscal taxi meter", Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83210A (15 November 2011); https://doi.org/10.1117/12.903666

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