由于转盘电极原子发射光谱（RDE-AES）技术具有操作简单、无须制备样品、结果可靠性强等优良特性，被广泛应用于油液检测。但该技术采用的光源主要是电弧，由于电极磨损导致放电间隙改变造成的电弧不稳定等原因导致最后采集的光谱数据所分析的结果与实际存在误差。本文提出了一种基于“双转盘”电极结构的原子发射光谱油液检测装置的检测方法，即将传统“棒-转盘”电极结构中的棒电极更换为可以旋转的转盘电极，其显著优势是减小了电极磨损所带来的检测误差。对其结构进行物理建模，通过COMSOL多物理场仿真软件对电弧激发的过程进行了仿真，采用控制变量法研究了电极间隙、油膜厚度、外加激励三个主要变量对电弧激发效果的变化规律的影响，得到了影响因素与电弧激发时刻和激发瞬时温度的关系曲线图，并根据仿真结果进行了参数优化。仿真结果显示，“双转盘”电极结构较传统结构的激发效果有了明显改善，激发时间和激发温度都有一定的改善，尤其在大批量检测时电弧激发效果稳定，验证了该方法的先进性和实用性，为转盘电极原子发射光谱油液检测方法的进一步深入研究提供了分析支持。

Atomic emission spectroscopy of turntable electrode (RDE-AES) is widely used in oil detection because of its simple operation, no need for sample preparation, and high reliability. However, the arc is the primary light source used in this technology. The instability of the arc caused by the change in the discharge gap induced by electrode wear and other factors leads to errors between the analysis results of the last collected spectral data and the actual situation. Herein, a method using atomic emission spectrometry with an oil detection device based on the “double turntable” electrode structure is proposed. In other words, the rod electrode in the traditional “rod turntable” electrode structure is replaced by a turntable electrode that can rotate. Its significant advantage is that it reduces the detection error caused by electrode wear. For its structural physical modeling, the process of arc excitation is simulated by COMSOL multi physical field simulation software. Further, the changing rules of electrode gap, oil film thickness, and external excitation on the arc excitation effect are explored using the control variable method. The effects of the influencing factors on the arc excitation time and instantaneous excitation temperature are obtained, and the parameters are optimized according to the simulation results. The simulation results show that the excitation effect of the “double turntable" electrode structure is significantly improved compared with the traditional structure, and the excitation time and temperature are improved to a certain extent. In particular, the arc excitation effect is stable in mass testing, which verifies the progressiveness and practicability of this method. It also provides analytical support for in-depth research on oil detection using the method based on turntable electrode atomic emission spectrometry.