Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter
This paper presents ways of inductance sensitivity improvement in a quartz crystal converter for low inductance measurement. To improve the converter’s sensitivity, two quartz crystals that were connected in parallel and additional capacitance connected to the two quartz crystals in the os...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-05-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/19/9/2188 |
| _version_ | 1798041378316353536 |
|---|---|
| author | Vojko Matko Miro Milanovic |
| author_facet | Vojko Matko Miro Milanovic |
| author_sort | Vojko Matko |
| collection | DOAJ |
| description | This paper presents ways of inductance sensitivity improvement in a quartz crystal converter for low inductance measurement. To improve the converter’s sensitivity, two quartz crystals that were connected in parallel and additional capacitance connected to the two quartz crystals in the oscillator’s circuit are used. The new approach uses a converter with special switchable oscillator and multiplexer switches to compensate for the crystal’s natural temperature-frequency characteristics and any other influences, such as parasitic capacitances and parasitic inductances, which reduce them to a minimum. The experimental results demonstrate improved sensitivity and well-compensated dynamic temperature influence on the converter’s output frequency. The fundamental quartz crystal frequency-temperature characteristics in the temperature range between 0–40 °C are simultaneously compensated. Furthermore, the converter enables the measurement of the influence of its own hysteresis at different values of inductances at the selected sensitivity by parallel capacitances connected either to the single- or dual-quartz crystal unit. The results show that the converter converting inductances in the range between 85–100 μH to a frequency range between 1–150 kHz only has ±0.05 ppm frequency instability (during the temperature change between 0–40 °C), which gives the converter a resolution of 1 pH. As a result, the converter can be applied where low inductance measurement, nondestructive testing, impedance change measurement, and magnetic material properties measurement are important. |
| first_indexed | 2024-04-11T22:20:42Z |
| format | Article |
| id | doaj.art-178fd0ef31504a99b305405f29afa95b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:20:42Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-178fd0ef31504a99b305405f29afa95b2022-12-22T04:00:09ZengMDPI AGSensors1424-82202019-05-01199218810.3390/s19092188s19092188Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal ConverterVojko Matko0Miro Milanovic1Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 046, 2000 Maribor, SloveniaFaculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 046, 2000 Maribor, SloveniaThis paper presents ways of inductance sensitivity improvement in a quartz crystal converter for low inductance measurement. To improve the converter’s sensitivity, two quartz crystals that were connected in parallel and additional capacitance connected to the two quartz crystals in the oscillator’s circuit are used. The new approach uses a converter with special switchable oscillator and multiplexer switches to compensate for the crystal’s natural temperature-frequency characteristics and any other influences, such as parasitic capacitances and parasitic inductances, which reduce them to a minimum. The experimental results demonstrate improved sensitivity and well-compensated dynamic temperature influence on the converter’s output frequency. The fundamental quartz crystal frequency-temperature characteristics in the temperature range between 0–40 °C are simultaneously compensated. Furthermore, the converter enables the measurement of the influence of its own hysteresis at different values of inductances at the selected sensitivity by parallel capacitances connected either to the single- or dual-quartz crystal unit. The results show that the converter converting inductances in the range between 85–100 μH to a frequency range between 1–150 kHz only has ±0.05 ppm frequency instability (during the temperature change between 0–40 °C), which gives the converter a resolution of 1 pH. As a result, the converter can be applied where low inductance measurement, nondestructive testing, impedance change measurement, and magnetic material properties measurement are important.https://www.mdpi.com/1424-8220/19/9/2188inductance-to-frequency converterdual quartz crystal operationenhanced inductance sensing performance |
| spellingShingle | Vojko Matko Miro Milanovic Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter Sensors inductance-to-frequency converter dual quartz crystal operation enhanced inductance sensing performance |
| title | Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter |
| title_full | Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter |
| title_fullStr | Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter |
| title_full_unstemmed | Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter |
| title_short | Highly Enhanced Inductance Sensing Performance of Dual-Quartz Crystal Converter |
| title_sort | highly enhanced inductance sensing performance of dual quartz crystal converter |
| topic | inductance-to-frequency converter dual quartz crystal operation enhanced inductance sensing performance |
| url | https://www.mdpi.com/1424-8220/19/9/2188 |
| work_keys_str_mv | AT vojkomatko highlyenhancedinductancesensingperformanceofdualquartzcrystalconverter AT miromilanovic highlyenhancedinductancesensingperformanceofdualquartzcrystalconverter |