鑒于氧濃度傳感器、氧化鋯傳感器本身的特性,處于壽命末期的傳感器在測(cè)量時(shí),會(huì)出現(xiàn)精度誤差及漂移特性.為減小傳感器漂移影響,基于多傳感器數(shù)據(jù)融合技術(shù),選擇穩(wěn)定性及一致性較好的傳感器測(cè)量值作為自動(dòng)標(biāo)定基準(zhǔn)值,并在這一基礎(chǔ)上,改單點(diǎn)k值標(biāo)定方法為多點(diǎn)k值標(biāo)定方法.驗(yàn)證結(jié)果顯示:當(dāng)電壓值漂移量達(dá)到0.1 V時(shí),常規(guī)標(biāo)定方法氧分壓漂移量將超過(guò)2 kPa,漂移量不超過(guò)0.5 kPa.因此,該標(biāo)定方法增加了氧傳感器漂移的適應(yīng)范圍,降低了測(cè)量誤差,減少了標(biāo)定的頻次.  

Considering the inherent characteristics of oxygen concentration sensors and zirconia sensors, particularly towards the end of their lifespan, these devices exhibit measurement inaccuracies and drift. To mitigate the impact of sensor drift, this study employs data fusion techniques, selecting stable and consistent sensor readings as a reference for automatic calibration. It then modifies the single-point k-value calibration method to a multi-point one. The validation results show that when the voltage drift reaches 0.1 V, the conventional calibration method leads to an oxygen partial pressure drift of over 2 kPa, while the proposed method limits it to below 0.5 kPa. Consequently, the new calibration approach expands the sensor's drift tolerance, reduces measurement errors, and decreases the calibration frequency.

中國(guó)航天員科研訓(xùn)練中心,北京 100094 ISSN：2096-8655