JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE)

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The varation of gas concentration in the closed testing of the air sensors

YUAN Qinghua1，GAO Hong2，QIU Nanwan1   

  1. 1. School of Physics and Microelectronics,Shandong University,Jinan 250061,China;2. Department of Electrical and Autometical Engineering,Shandong Metallurgy Technology Institute,Jinan 250000,China
  • Received:2004-10-15 Revised:1900-01-01 Online:2006-08-24 Published:2006-08-24
  • Contact: YUAN Qinghua<

Abstract: The formula of reaction exothermic rate Prea of sensors and the differential equation of closed test chamber gas concentration C varies with t is given. From the solution of differential equation Ct curve, it is proved that the relaxation of gas concentration is rather slow and the errors of clssed chember test can be neglected.

Key words: closed chamber test, reaction exothermic rate , gas sensors

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