Multichannel Inductive Sensor Based on Phase Division Multiplexing for Wear Debris Detection
AbstractInductive wear debris sensor has been widely used in real time machine lubricant oil condition monitoring and fault forecasting. However, the small sensing zone, which is designed for high sensitivity, of the existing sensors leads to low throughput. In order to improve the throughput, a novel multichannel wear debris sensor that is based on phase division multiplexing is presented. By introducing the phase shift circuit into the system, multiple sensing coils could work at different initial phases. Multiple signals of sensing coils could be combined into one output without information loss. Synchronized sampling is used for data recording, and output signals of multiple sensing coils are extracted from the recorded data. A four-channel wear debris sensor system was designed to demonstrate our method. Subsequently, crosstalk analysis, pseudo-dynamic testing and dynamic testing were conducted to check the sensing system. Results show that signals of four sensing coils could be simultaneously detected and the detection limit for ferrous wear debris is 33 μm. Using the presented method, real time wear debris detection in multiple channels could be achieved without increasing the number of excitation source and data acquisition equipment. View Full-Text
Share & Cite This Article
Wu, S.; Liu, Z.; Yuan, H.; Yu, K.; Gao, Y.; Liu, L.; Pan, X. Multichannel Inductive Sensor Based on Phase Division Multiplexing for Wear Debris Detection. Micromachines 2019, 10, 246.
Wu S, Liu Z, Yuan H, Yu K, Gao Y, Liu L, Pan X. Multichannel Inductive Sensor Based on Phase Division Multiplexing for Wear Debris Detection. Micromachines. 2019; 10(4):246.Chicago/Turabian Style
Wu, Sen; Liu, Zhijian; Yuan, Haichao; Yu, Kezhen; Gao, Yuefeng; Liu, Liankun; Pan, Xinxiang. 2019. "Multichannel Inductive Sensor Based on Phase Division Multiplexing for Wear Debris Detection." Micromachines 10, no. 4: 246.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.