Chaotic Oscillators as Inductive Sensors: Theory and Practice
Abstract
:1. Introduction
2. Materials and Methods
2.1. Synthesis of the Chaotic Circuit with Inductive Element
2.1.1. Converting the Differential Equation into the Circuit
2.1.2. Coil and Targets
2.1.3. Effect of the Coil Series Resistance
- The use of a negative impedance converter (NIC), see Figure 8a. Trimmer R1 is used when the resistance of the coil is unknown or when the circuit is to be used with several coils.
- The use of a current sensor with subsequent voltage compensation at the bottom connection point of the inductance. The appropriate circuit is shown in Figure 8b. The ratio of resistors R3 and R4 sets the gain of the operational amplifier and can be calculated by the following equation:
2.1.4. Controlled Source Implementation
2.1.5. Influence of the Voltage-Controlled Current Source
2.2. Target Detection
2.2.1. Analysis of the Oscillation Regime
2.2.2. Sensitivity Tuning
3. Experimental Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
Appendix A
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Target | Distance (cm) |
---|---|
Steel plate Ø = 150 mm | 16 |
Copper plate 100 mm × 70 mm × 0.018 mm | 9 |
Steel scale calibration weight 50 g | 3 |
Silver ring Ø = 19 mm | 3 |
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Karimov, T.; Nepomuceno, E.G.; Druzhina, O.; Karimov, A.; Butusov, D. Chaotic Oscillators as Inductive Sensors: Theory and Practice. Sensors 2019, 19, 4314. https://doi.org/10.3390/s19194314
Karimov T, Nepomuceno EG, Druzhina O, Karimov A, Butusov D. Chaotic Oscillators as Inductive Sensors: Theory and Practice. Sensors. 2019; 19(19):4314. https://doi.org/10.3390/s19194314
Chicago/Turabian StyleKarimov, Timur, Erivelton Geraldo Nepomuceno, Olga Druzhina, Artur Karimov, and Denis Butusov. 2019. "Chaotic Oscillators as Inductive Sensors: Theory and Practice" Sensors 19, no. 19: 4314. https://doi.org/10.3390/s19194314