基于单片机的瓦斯传感器零点调整及灵敏度校正系统 

根据瓦斯传感器自动调零和灵敏度校正的机理，设计了以80C31单片机为核心的自动调校系统，实验表明：该系统可显著提高瓦斯传感器测量精度，具有性价比高、稳定可靠的特点。阐述了系统的工作原理、设计方案、硬件组成及软件设计，并给出系统自动调校前后的测试对比结果。  Zero　Adjustment　and　Sensitivity　Correction　System　of　Methane　Sensor
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Based　on　Singlechip　Microcomputer

HUANG　Jing1，QUE　Pei-wen1，TANG Jing-su2
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（1.Institute　of　Automatic　Detection，Shanghai　Jiaotong　University，Shanghai　200030，China；2.College　of　Information　Engineering，Taiyuan　University　of　Technology，Taiyuan　030024，China）

Abstract： According　to　the　mechanism　of　the　automatic　zero　adjustment　and　sensitivity　correction　of　the　methane　sensor，the　automatic　adjustment　and　correction　system　is　designed　with　the　80C31　single-chip　microcomputer　as　its　core. The　experiment　work　revealed，this　system　can　greatly　raise　the　measurement　precision　of　the　methane　sensor　with　the　characteristics　of　high　quality　low　cost　and　stability and　reliability. The　working　principle，the　design　scheme，the　hardware　circuits　design　and　the　software　programs　are　stated，and　the　tested　results　revealed　without　and　with　the　automatic　adjustment　and　correction　system　are　given.

Key　Words： Methane；Carrier　Catalyst　Unit；Single-chip　Microcomputer；Automatic　Zero Adjustment；Sensitivity　Correction