基于載體催化元件檢測(cè)甲烷濃度的基本原理，提出了采用載體催化元件和參比元件組成惠斯登測(cè)量電橋，運(yùn)用溫度自動(dòng)控制系統(tǒng)達(dá)到恒定甲烷無(wú)焰燃燒溫度，實(shí)現(xiàn)甲烷濃度的測(cè)量。擴(kuò)展了采用載體催化元件測(cè)量甲烷濃度時(shí)的測(cè)量范圍，減輕了催化劑的高溫?zé)Y(jié)和揮發(fā)現(xiàn)象，延長(zhǎng)了載體催化元件的使用壽命。并建立了相應(yīng)的溫度自動(dòng)控制和甲烷濃度測(cè)量的數(shù)學(xué)模型。

Based on the basic principle of sensors with supporter filled element that measures the methane concentration, a method for designing Weston bridge by using the sensor and the reference element is proposed and the mathematical model of the automatic temperature control and the measurement of methane concentration is developed. The measurement results show that this design expands the measuring range, reduces burning-knot and vaporization of catalyst and extends the service life of the supporter catalyst filled element.