Abstract

In a measurement system, it is sometimes necessary to extract very small sensor signals from noise. This study performs a digital lock-in amplifier implemented on an ARM Microcontroller for detecting low concentration gas. This lockin system has the ability to increase the sensitivity or signal to noise ratio. In the experiment, the lock-in system with the varies gain and cutoff frequency. The sensitivity and the signal to noise ratio can be considerably improved by means of the proposed system. The results showed that the signal to noise ratio of the original signal and the lock-in system with the unity gain were -4.73 dB and 4.08 dB, respectively. The higher gain implemented on the lock-in system would produce the higher signal to noise ratio. The lock-in system has also been tested for detecting of carbon monoxide gas resulting a signal to noise ratio of the gas sensor and the lock-in system are 3.9 and 15.6 dB, respectively.

Original languageEnglish
Title of host publication2017 International Seminar on Intelligent Technology and Its Application
Subtitle of host publicationStrengthening the Link Between University Research and Industry to Support ASEAN Energy Sector, ISITIA 2017 - Proceeding
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages319-322
Number of pages4
ISBN (Electronic)9781538627068
DOIs
Publication statusPublished - 28 Nov 2017
Event18th International Seminar on Intelligent Technology and Its Application, ISITIA 2017 - Surabaya, Indonesia
Duration: 28 Aug 201729 Aug 2017

Publication series

Name2017 International Seminar on Intelligent Technology and Its Application: Strengthening the Link Between University Research and Industry to Support ASEAN Energy Sector, ISITIA 2017 - Proceeding
Volume2017-January

Conference

Conference18th International Seminar on Intelligent Technology and Its Application, ISITIA 2017
Country/TerritoryIndonesia
CitySurabaya
Period28/08/1729/08/17

Keywords

  • ARM microcontroller
  • Digital lock-in amplifier
  • Low concentration gas

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