静电传感器对滑油系统磨粒电量测量方法研究  

Study on measurement method of Debris' change using the electrostatic sensor in the oil system

作　　者：冒慧杰 左洪福[1] 殷逸冰[1] 刘若晨[1] 张营[2] 

机构地区：[1]南京航空航天大学民航学院,南京210016 [2]南京林业大学汽车与交通工程学院,南京210037

出　　处：《仪器仪表学报》2016年第1期40-47,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(61403198);国家自然科学基金(51505229)项目资助

摘　　要：根据静电感应原理,磨粒出现在空间不同位置时,静电传感器电极感应到的电荷量相差很大,由于磨粒出现的位置是未知的,因此很难精确测量磨粒的带电量。借助数学模型,对传感器输出信号与磨粒的关系进行仿真分析。由仿真结果可知,信号的幅值与磨粒携带的电荷量以及磨粒在传感器中所处的径向位置有关;而在已知管道中滑油流速分布的情况下,脉冲宽度只与径向位置有关。提出了通过脉冲宽度确定磨粒所处的径向位置,根据传感器在该径向位置处的灵敏度获得比较准确的磨粒带电量的测量方法。通过带电油滴模拟磨粒,对该方法进行实验验证,实验结果与仿真分析结果基本重合,该方法的测量结果与通过静电计测得的结果相比,误差不超过5%。According to the principle of electrostatic induction, when debris appears in the different space position, the charge induced in the electrostatic sensor electrode varies widely. Because the location with debris is unknown in fact, it is difficult to accurately measure the debris＇ charge. With the mathematical model, the relationship between the sensor output signal and abrasive particle is analyzed. Results show that the signal amplitude has a relationship with the charge and the position of the debris. If the oil flow velocity distribution in pipe is known, the signal＇s pulse width is only related to the radial position. According to the relationships, a measurement method is presented, which is that the signal＇s pulse width determines the debris＇ radial position, and the accurate charge can be obtained according to the sensitivity of sensors in the radial location. A simulation experiment is carried out by replacing charged debris with charged oil droplets. The experiment results agree well with the simulation analysis results. Compared with the results measured by the electrometer, the error is less than 5%.

关 键 词：静电传感器 脉冲宽度 电荷测量 模型仿真 滑油系统 荷电磨粒 

分 类 号：V233.4[航空宇航科学与技术—航空宇航推进理论与工程] TH73[机械工程—仪器科学与技术]