Performance Characteristics and Temperature Compensation Method of Fluid Property Sensor Based on Tuning-Fork Technology

Chen, Yuan; Mei, Guifu; Yang, Huanghuang; Fang, Yu; Gao, Jun

doi:10.1155/2016/1386564

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…Han et al present a cylinder capacitive sensor to detect changes in the lubrication oil condition of an engine lubrication system [ 39 ]. Moreover, sensors based on other electrical properties measurements have been also studied, such as Chen et al [ 40 ], Shinde et al [ 41 ] and Riziotis et al [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

Low Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation

Palomo‐López

Mabe

Mezquita³

et al. 2018

Sensors

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Lubricant and hydraulic fluid ageing impacts the performance of the machines, gears, transmissions or automatisms where they are being used. This manuscript describes the work accomplished for bringing an innovative measurement concept for analysing the physical- chemical properties of these fluids, to a real industrial product ready to be integrated into different industrial equipment. The steps taken to deal with uncertainties and evolving requirements while progressing in the sensor development are described, covering the stages of theoretical formulation of the problem, optical and fluidic simulations, sensor prototype development and tests. The sensor working principle is based on a combination of transmittance and diffuse reflectance photonic inspection of the fluid sample that is collected in a micro-cavity through a standard hydraulic fitting. Photonics, electronics, micro-mechanics, fluidics, data processing and analysis has been merged with a deep knowledge in the lubricant degradation process to develop a sensor solution that is able to measure the Oil Degradation Index, Oil Oxidation, Acid Number, Ruler and Membrane Patch Colorimetry data from an in-service lubricating oil sample. The photonic micro sensor presented here offers a powerful tool that operates directly immersed in the fluid, at an economic cost and compacted size for in-line oil degradation monitoring.

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Section: Introductionmentioning

confidence: 99%

Low Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation

Palomo‐López

Mabe

Mezquita³

et al. 2018

Sensors

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“…Another option is to include a temperature compensation factor [ 20 ] within a time synchronization clock-skew-based protocol, for instance, FTSP. This approach was suggested in Adjusted Temperature FTSP (AT–FTSP) and Advanced Adjusted Temperature FTSP (A2T–FTSP) [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Homomorphic Filtering for Improving Time Synchronization in Wireless Networks

Castillo-Secilla

Muñoz

León

et al. 2017

Sensors

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Wireless sensor networks are used to sample the environment in a distributed way. Therefore, it is mandatory for all of the measurements to be tightly synchronized in order to guarantee that every sensor is sampling the environment at the exact same instant of time. The synchronization drift gets bigger in environments suffering from temperature variations. Thus, this work is focused on improving time synchronization under deployments with temperature variations. The working hypothesis demonstrated in this work is that the clock skew of two nodes (the ratio of the real frequencies of the oscillators) is composed of a multiplicative combination of two main components: the clock skew due to the variations between the cut of the crystal of each oscillator and the clock skew due to the different temperatures affecting the nodes. By applying a nonlinear filtering, the homomorphic filtering, both components are separated in an effective way. A correction factor based on temperature, which can be applied to any synchronization protocol, is proposed. For testing it, an improvement of the FTSP synchronization protocol has been developed and physically tested under temperature variation scenarios using TelosB motes flashed with the IEEE 802.15.4 implementation supplied by TinyOS.

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Performance Characteristics and Temperature Compensation Method of Fluid Property Sensor Based on Tuning-Fork Technology

Cited by 2 publications

References 26 publications

Low Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation

Low Cost Photonic Sensor for in-Line Oil Quality Monitoring: Methodological Development Process towards Uncertainty Mitigation

Homomorphic Filtering for Improving Time Synchronization in Wireless Networks

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