Analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oils
Currently, interdigital capacitive (IDC) sensors are widely used in science, industry and technology. To measure the changes in capacitance in these sensors, many methods such as differentiation, phase delay between two signals, capacitor charging/discharging, oscillators and switching circuits have...
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| Format: | Article |
| Language: | English |
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AIMS Press
2023-10-01
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| Series: | AIMS Electronics and Electrical Engineering |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/electreng.2023015?viewType=HTML |
| _version_ | 1797367651718135808 |
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| author | Vasileios Delimaras Kyriakos Tsiakmakis Argyrios T. Hatzopoulos |
| author_facet | Vasileios Delimaras Kyriakos Tsiakmakis Argyrios T. Hatzopoulos |
| author_sort | Vasileios Delimaras |
| collection | DOAJ |
| description | Currently, interdigital capacitive (IDC) sensors are widely used in science, industry and technology. To measure the changes in capacitance in these sensors, many methods such as differentiation, phase delay between two signals, capacitor charging/discharging, oscillators and switching circuits have been proposed. These techniques often use high frequencies and high complexity to measure small capacitance changes of fF or aF with high sensitivity. An analog interface based on a capacitance multiplier for capacitive sensors is presented. This study includes analysis of the interface error factors, such as the error due to the components of the capacitance multiplier, parasitic capacitances, transient effects and non-ideal parameters of OpAmp. A design approach based on an IDC sensor to measure the quality of edible oils is presented and implemented. The quality relates to the total polar compounds (TPC) and consequently to relative electrical permittivity $ {\varepsilon }_{r} $ of the oils. A measurement system has been implemented to measure the capacitance of the IDC sensor, which depended on $ {\varepsilon }_{r} $. The simulation and experimental results showed that, for a capacitance multiplication factor equal to 1000, changes of 3.3 µs/100 fF can be achieved with an acceptable level of noise, which can be easily measured by a microcontroller. |
| first_indexed | 2024-03-08T17:21:20Z |
| format | Article |
| id | doaj.art-fbaf6bb187bf404b8e5255e30abbaf56 |
| institution | Directory Open Access Journal |
| issn | 2578-1588 |
| language | English |
| last_indexed | 2024-03-08T17:21:20Z |
| publishDate | 2023-10-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Electronics and Electrical Engineering |
| spelling | doaj.art-fbaf6bb187bf404b8e5255e30abbaf562024-01-03T05:41:24ZengAIMS PressAIMS Electronics and Electrical Engineering2578-15882023-10-017424327010.3934/electreng.2023015Analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oilsVasileios Delimaras0Kyriakos Tsiakmakis1Argyrios T. Hatzopoulos2Department of Information and Electronic Engineering, International Hellenic University (IHU), Sindos, Thessaloniki, 57400, GreeceDepartment of Information and Electronic Engineering, International Hellenic University (IHU), Sindos, Thessaloniki, 57400, GreeceDepartment of Information and Electronic Engineering, International Hellenic University (IHU), Sindos, Thessaloniki, 57400, GreeceCurrently, interdigital capacitive (IDC) sensors are widely used in science, industry and technology. To measure the changes in capacitance in these sensors, many methods such as differentiation, phase delay between two signals, capacitor charging/discharging, oscillators and switching circuits have been proposed. These techniques often use high frequencies and high complexity to measure small capacitance changes of fF or aF with high sensitivity. An analog interface based on a capacitance multiplier for capacitive sensors is presented. This study includes analysis of the interface error factors, such as the error due to the components of the capacitance multiplier, parasitic capacitances, transient effects and non-ideal parameters of OpAmp. A design approach based on an IDC sensor to measure the quality of edible oils is presented and implemented. The quality relates to the total polar compounds (TPC) and consequently to relative electrical permittivity $ {\varepsilon }_{r} $ of the oils. A measurement system has been implemented to measure the capacitance of the IDC sensor, which depended on $ {\varepsilon }_{r} $. The simulation and experimental results showed that, for a capacitance multiplication factor equal to 1000, changes of 3.3 µs/100 fF can be achieved with an acceptable level of noise, which can be easily measured by a microcontroller.https://www.aimspress.com/article/doi/10.3934/electreng.2023015?viewType=HTMLanalog interfacecapacitive sensorsquality of oilstotal polar compoundsinterdigital capacitorcapacitance multipliercapacitance-to-time converter |
| spellingShingle | Vasileios Delimaras Kyriakos Tsiakmakis Argyrios T. Hatzopoulos Analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oils AIMS Electronics and Electrical Engineering analog interface capacitive sensors quality of oils total polar compounds interdigital capacitor capacitance multiplier capacitance-to-time converter |
| title | Analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oils |
| title_full | Analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oils |
| title_fullStr | Analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oils |
| title_full_unstemmed | Analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oils |
| title_short | Analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oils |
| title_sort | analog interface based on capacitance multiplier for capacitive sensors and application to evaluate the quality of oils |
| topic | analog interface capacitive sensors quality of oils total polar compounds interdigital capacitor capacitance multiplier capacitance-to-time converter |
| url | https://www.aimspress.com/article/doi/10.3934/electreng.2023015?viewType=HTML |
| work_keys_str_mv | AT vasileiosdelimaras analoginterfacebasedoncapacitancemultiplierforcapacitivesensorsandapplicationtoevaluatethequalityofoils AT kyriakostsiakmakis analoginterfacebasedoncapacitancemultiplierforcapacitivesensorsandapplicationtoevaluatethequalityofoils AT argyriosthatzopoulos analoginterfacebasedoncapacitancemultiplierforcapacitivesensorsandapplicationtoevaluatethequalityofoils |