Measurement of Electrical Discharge Machining Oil Quality by Analyzing Variations in the Equivalent Relative Permittivity of the Capacitive Sensor
| Autor: | Yi Li Chen, Dong Lin Chuang, Yi Chun Chen, Yu Jui Chang, Shih Jui Chen, Hai Ping Tsui, Yean Ren Hwang |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Letter Capacitive sensing Relative permittivity 02 engineering and technology lcsh:Chemical technology 01 natural sciences Biochemistry Capacitance Analytical Chemistry Electrical discharge machining Impurity equivalent relative permittivity lcsh:TP1-1185 Electrical and Electronic Engineering Composite material Instrumentation 010401 analytical chemistry Carbon black 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Atomic and Molecular Physics and Optics 0104 chemical sciences Volume (thermodynamics) capacitive sensors Particle 0210 nano-technology electrical discharge machining oil |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 20, Iss 6248, p 6248 (2020) |
| ISSN: | 1424-8220 |
| Popis: | In this study, a concentration monitoring system was successfully developed. A sensor was immersed in electrical discharge machining oil, and the capacitance of the sensor changed as a function of the impurity concentration. Thus, DC voltage variations were produced via a conversion circuit. Carbon black and iron particles with different concentrations were successfully characterized. The capacitance increments were positively correlated with the particle concentration. The linear fitting results based on the impurity concentration were used to express the degree of influence of particles with different weight percentage concentrations on the increase in the overall capacitance value. An equivalent medium theory model was then developed according to the electrical characteristics of the impurities to predict different particle volume percentages. |
| Databáze: | OpenAIRE |
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