Journal ArticleDOI
A Highly Sensitive In-Line Oil Wear Debris Sensor Based on Passive Wireless LC Sensing
TLDR
In this paper, the authors proposed a new, and efficient, wear debris detection sensor based on passive wireless LC sensing approach, which enables online monitoring of metal debris in hydraulic flow tubes with large thickness, employed in high pressure applications.Abstract:
This paper presents ${a}$ new, and efficient, wear debris detection sensor based on passive wireless LC sensing approach. This sensor enables online monitoring of metal debris in hydraulic flow tubes with large thickness, employed in high-pressure applications. In conventional inductive debris sensors, the coil is kept outside the tube. $(i)$ Hence, for thick tubes, the sensitivity is extremely low. If the coil is kept inside the tube, holes are required to connect it to the measurement unit (MU). (ii) This limits the pressure withstanding capacity. The proposed sensor solves these two problems using the wireless LC sensor approach, wherein the MU is connected to an outer coil (outside the thick tube), and an inner coil is kept close to the oil, with debris. Thus, it is highly sensitive to the debris. It requires no electrical connection to the MU. The outer coil is energized from an AC signal at the parallel resonance frequency of the system, drawing minimum current from the source. The change in phase of this current, due to the change in inductance of the inner coil as debris passes, is measured using ${a}$ phase-sensitive detector. This highly sensitive measurement approach together with the fact that the inner coil is close to the oil, helps to achieve high sensitivity, and enables monitoring flow tubes with large diameter and thickness. ${A}$ prototype of the proposed wireless LC debris sensor has been developed (inner and outer diameters of 25.4 mm and 80 mm respectively), integrated into ${a}$ hydraulic circuit and tested. The output was not only very sensitive to ferrous and non-ferrous metallic particles but also helps in distinguishing them.read more
Citations
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Journal ArticleDOI
Assessment of Condition Diagnosis System for Axles with Ferrous Particle Sensor
Sung-Ho Hong,Hong-Gyu Jeon +1 more
TL;DR: In this paper , a condition diagnosis system based on a ferrous particle sensor is presented to estimate the durability of axles in construction equipment, which provides information on the amount of wear with respect to ferrous particles using a simple diagnostic algorithm.
Journal ArticleDOI
Analysis of the Effect of Velocity on the Eddy Current Effect of Metal Particles of Different Materials in Inductive Bridges
Wei Li,Shuang Yu,Hongpeng Zhang,Xingming Zhang,Chenzhao Bai,Haotian Shi,Yucai Xie,Chengjie Wang,Zhiwei Xu,Lin Zeng,Yuqing Sun +10 more
TL;DR: In this paper , a method for analyzing the influence of velocity changes on metal signals of different materials in oil detection technology is proposed, based on a high-sensitivity inductive bridge, the eddy current effect of velocity in a time-harmonic magnetic field is theoretically analyzed and experimentally verified.
Journal ArticleDOI
A Portable Device for Passive LC Sensors Readout With Low-Coupling Enhanced Sensitivity
TL;DR: In this paper , the authors proposed a method suitable for implementation on the portable device for wireless readout of LC sensors, which eliminates the need for costly and bulky laboratory equipment (impedance analyzers and vector network analyzers).
Journal ArticleDOI
A Portable Device for Passive LC Sensors Readout With Low-Coupling Enhanced Sensitivity
TL;DR: In this paper , an electrical circuit of voltage divider formed by a primary inductor and a reference resistor is proposed to detect the resonant frequency of the LC sensor from the processing of the measured voltage across the reference resistor.
Journal ArticleDOI
Magnetic Plug Sensor with Bridge Nonlinear Correction Circuit for Oil Condition Monitoring of Marine Machinery
Yuwei Zhang,Ji-Eun Hong,Haotian Shi,Yucai Xie,Hongpeng Zhang,Shuyao Zhang,Wei Li,Hai Yan Chen +7 more
TL;DR: In this paper , a magnetic plug sensor for oil debris monitoring is proposed to improve sensitivity and accuracy of diesel engines through finite element analysis, absolute deviation is reduced by optimizing the sensor structure, which can facilitate calibration and data processing.
References
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Journal ArticleDOI
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Journal ArticleDOI
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Proceedings ArticleDOI
In-line oil debris monitor for aircraft engine condition assessment
J.L. Miller,D. Kitaljevich +1 more
TL;DR: In this paper, the development of an in-line, full flow oil debris sensor for aircraft engine condition assessment is described, based on an inductive measurement technique which enables the system to detect, count and classify wear metal particles by size and type above a minimum particle size threshold.
Journal ArticleDOI
An automotive engine oil viscosity sensor
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Journal ArticleDOI
Improving Sensitivity of an Inductive Pulse Sensor for Detection of Metallic Wear Debris in Lubricants Using Parallel LC Resonance Method
TL;DR: In this article, the authors applied an inductance-capacitance (LC) resonance method to an inductive pulse debris sensor to increase the sensitivity of small metallic wear debris.