Gas identification by a single sensing element is a challenging and promising technology. In this work, a novel strategy to identify gases by a single catalytic combustible sensor working in its linear range is proposed and investigated. In the strategy, a half-wavelength standing wave ultrasonic field is used to catalyze the combustion reaction on the sensing surface, and quantified ultrasonic enhancement effect on the sensing response, which is independent of the gas concentration and varies with the species of analyte gases, is employed to identify the gases. The experimental results show that the success rate of gas identification can reach 100 % when the ultrasonic vibration is strong enough, and the gas identification method has anti-interference capability when there is impurity gas in the target gas. The cause of the anti-interference capability is analyzed. The strategy proposed in this work provides a new design way which can make the structure, data processing and calibration of gas identification systems simpler.

通过单个传感元件进行气体识别是一项具有挑战性和前途的技术。在这项工作中，提出并研究了一种通过在其线性范围内工作的单一催化可燃传感器识别气体的新颖策略。在该策略中，使用半波长驻波超声场来催化传感表面上的燃烧反应，并量化超声增强对传感响应的影响，该影响与气体浓度无关，并随分析物气体的种类而变化，用于识别气体。实验结果表明，在超声振动足够强的情况下，气体识别的成功率可以达到100％，当目标气体中存在杂质气体时，该气体识别方法具有抗干扰能力。分析了抗干扰能力的原因。这项工作提出的策略提供了一种新的设计方法，可以使气体识别系统的结构，数据处理和标定更加简单。