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<p>Oxygen sensors for aircraft fuel inerting work in a closed pipeline environment, and the oxygen measurement environment has a wide range of oxygen concentrations. In order to solve the problems of existing oxygen sensors needing reference gases, narrow measurement range, and measurement difficulties in closed piping environments, this paper proposes and prepares a closed-cavity chip oxygen sensor based on electrochemical oxygen pump for fuel inerting according to the ion conduction mechanism in solid electrolytes and Nernst mechanism, using a small zirconia ceramic chip as the core, and indirectly deriving the oxygen concentration by measuring the partial pressure of oxygen in gas mixtures. The chip structure of this sensor was designed, prepared by casting molding and multilayer ceramic high-temperature co-firing techniques, and encapsulated. Based on the constructed oxygen concentration atmosphere testing system, the test results show that the designed closed chamber oxygen sensor has an intact oxygen circulation waveform, good linearity, a measurement error within 0.2%, an adjustment time within 3&#xa0;s, and stable operation, which can better meet the functional and performance requirements of the onboard oxygen sensor in the fuel inerting system.&#xa0;</p>

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Closed-chamber oxygen sensor for fuel inerting based on electrochemical oxygen pump

  • 期刊论文

  • 发表日期：

    2025年2月22日

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  • Xiaowei Xu,
  • Zhengxin Shu,
  • Feng Qian,
  • Rui Cui,
  • Xiong Bao,
  • Jie Wang,
  • Chao Wang,
  • Kai Wang,
  • Xiaofeng Guo

摘要

Oxygen sensors for aircraft fuel inerting work in a closed pipeline environment, and the oxygen measurement environment has a wide range of oxygen concentrations. In order to solve the problems of existing oxygen sensors needing reference gases, narrow measurement range, and measurement difficulties in closed piping environments, this paper proposes and prepares a closed-cavity chip oxygen sensor based on electrochemical oxygen pump for fuel inerting according to the ion conduction mechanism in solid electrolytes and Nernst mechanism, using a small zirconia ceramic chip as the core, and indirectly deriving the oxygen concentration by measuring the partial pressure of oxygen in gas mixtures. The chip structure of this sensor was designed, prepared by casting molding and multilayer ceramic high-temperature co-firing techniques, and encapsulated. Based on the constructed oxygen concentration atmosphere testing system, the test results show that the designed closed chamber oxygen sensor has an intact oxygen circulation waveform, good linearity, a measurement error within 0.2%, an adjustment time within 3 s, and stable operation, which can better meet the functional and performance requirements of the onboard oxygen sensor in the fuel inerting system.