新型平板式汽车氧传感器的结构设计与数值模拟
发布时间:2018-06-15 11:35
本文选题:平板氧传感器 + 温度场 ; 参考:《仪表技术与传感器》2016年07期
【摘要】:设计了利用铈基储氧材料作为固态储氧参比层的新型平板式浓差型汽车氧传感器的多层结构,采用APDL建立其参数化有限元模型,通过热传导分析,对加热器进行优化设计。对优化模型施加阶跃电压,通过对电热耦合场模拟显示:t=4 s时,传感器活性区域温度均达到工作温度(300℃)以上,t=63 s时,各层温度趋于稳定,其中t=5 s时,各层温度梯度最大。热力耦合结果显示:各层最大等效应力先增大再缩小,最后趋于稳定,在t=5 s时,各层热应力值最大,但均小于相应温度下的断裂强度。
[Abstract]:The multilayer structure of a new type of plate oxygen sensor for automobile using cerium based oxygen storage material as the solid oxygen storage reference layer is designed. The parameterized finite element model of the sensor is established by APDL, and the heater is optimized by heat conduction analysis. By applying the step voltage to the optimized model, the electrothermal coupling field simulation shows that when the temperature of the active region of the sensor reaches above 300 鈩,
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