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Inductively Powered Sensornode Transmitter Based on the Interconnection of a Colpitts and a Parallel Resonant LC Oscillator

Author

Listed:
  • David Demetz

    (Institute of Measurement and Sensor Technology, UMIT TIROL—Private University for Health Sciences and Health Technology, Eduard-Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria)

  • Alexander Sutor

    (Institute of Measurement and Sensor Technology, UMIT TIROL—Private University for Health Sciences and Health Technology, Eduard-Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria)

Abstract

An inductively powered passive transmitter architecture for wireless sensornodes is presented in this paper. The intended applications are inductively powered internally illuminated photoreactors. The application range of photoreactors is wide. They are used, e.g., for microalgae cultivation or for photochemistry, just to name two important fields of use. The inductive powering system used to transmit energy to the wireless internal illumination system is to be additionally used to supply the here presented transmitter. The aim of expanding the named internal illuminated photoreactors with wireless sensors is to obtain a better insight into the processes inside it. This will be achieved by measuring essential parameters such as, e.g., the temperature, pH value, or gas concentrations of the medium inside the reactor, which for algal cultivation would be water. Due to the passive architecture of the transmitter electronics, there is no need for batteries, and therefore, no temporal limitations in their operational cycle are given. The data transmission is also implemented using the inductive layer in the low frequency range. The data transmitting coil and the energy receive coil are implemented as one and the same coil in order to avoid interference and unwanted couplings between them, and in order to save weight and space. Additionally, the transmitter works in a two-step alternating cycle: the energy harvesting step, followed by the data transmission step. The measured values are sent using on-off keying. Therefore, a Colpitts oscillator is switched on and off. The circuit is simulated using SPICE simulations and consequentially implemented as a prototype in order to perform practical analyses and measurements. The feasibility of our transmitter is therefore shown with the performed circuit simulations, and practically, by testing our prototype on an internal illuminated laboratory scaled photoreactor.

Suggested Citation

  • David Demetz & Alexander Sutor, 2022. "Inductively Powered Sensornode Transmitter Based on the Interconnection of a Colpitts and a Parallel Resonant LC Oscillator," Energies, MDPI, vol. 15(17), pages 1-16, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:17:p:6198-:d:897962
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    References listed on IDEAS

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    1. Yujing Zhou & Chunhua Liu & Yongcan Huang, 2020. "Wireless Power Transfer for Implanted Medical Application: A Review," Energies, MDPI, vol. 13(11), pages 1-30, June.
    2. Yang Yang & Mohamed El Baghdadi & Yuanfeng Lan & Yassine Benomar & Joeri Van Mierlo & Omar Hegazy, 2018. "Design Methodology, Modeling, and Comparative Study of Wireless Power Transfer Systems for Electric Vehicles," Energies, MDPI, vol. 11(7), pages 1-22, July.
    3. Ghada Bouattour & Mohamed Elhawy & Slim Naifar & Christian Viehweger & Houda Ben Jmaa Derbel & Olfa Kanoun, 2020. "Multiplexed Supply of a MISO Wireless Power Transfer System for Battery-Free Wireless Sensors," Energies, MDPI, vol. 13(5), pages 1-23, March.
    4. Alexander Sutor & Martin Heining & Rainer Buchholz, 2019. "A Class-E Amplifier for a Loosely Coupled Inductive Power Transfer System with Multiple Receivers," Energies, MDPI, vol. 12(6), pages 1-15, March.
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