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Abstract
The concentration of methane monitor controlled by chip
microprocessors15 able to sound the alarm bell based on the limit of
methane concentration, and start device to drain the gas at the same
time.
The instrument include CPU , sensitive element , Canmengou
monitoring circuit , little signal amplify circuit , A/D transform
circuit , communication circuit , display circuit , monitoring
circuit, CPU is the core in the instrument , complete data gather,
Process , export, display and so on. Sensitive element is one of the
important to measure the concentration of methane, and it’s export is
a little voltage signal, little signal amplify circuit is to transform
the analogue signal to digital signal,display circuit is to display the
concentration of methane , monitoring circuit is to monitor the
overstep limit of methane concentration·
The feature is new design,accurately measure parameter,convenient
to operate and so on.
Keywords: AT89C51, sensitive element, A/D transformation
Circuit.
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