Respiratory Monitoring by a Field Ionization Sensor  Based on Trichel Pulses

Deng, Fucheng; Ye, Lingyun; Song, Kaichen

doi:10.3390/s140610381

Cited by 6 publications

(4 citation statements)

References 36 publications

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“…Tran et al [18] established a 2D finite element fluid model of Trichel pulses to study the behavior of charged particles in the pulse process. Liao et al [23,24] and Deng et al [25][26][27] also studied the distribution of electric field, space charge, electron density and the process of Trichel pulses by using a fluid model. More recently, Duran-Olivencia et al [28] obtained the development of Trichel pulses in oxygen by solving the transport equations of the most significant species during the pulse propagation.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of trichel pulse of negative corona discharge in N₂–O₂mixture

Xia¹,

Jiang²,

Wang³

et al. 2017

J. Phys. D: Appl. Phys.

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Trichel pulse of negative corona discharge in atmospheric air is investigated numerically using a 2D fluid model. The model consists of a hyperbolic cathode tip and a plane anode, and considers 11 kinds of particles and the most important interactions among them. The spatio-temporal evolution of charged species and the electric field are evaluated during the pulse process. During the pulse rising edge, the positive ions accumulate ahead of the tip forming the temporal cathode sheath, significantly enhancing the local field. In the pulse decay edge, the temporal sheath collapses and the discharge falls back to a low-current mode. In the pulse interval, the discharge does not cease but sustains weakly until the next pulse. The location of the temporal sheath is independent of the averaged value during the Trichel pulse regime and also the same with that in a normal glow regime, which determines a nearly constant pulse rising time at given configurations. However, a smaller tip radius will lead to their decrease. The effect of negative ions on the pulse process is studied by adjusting the attachment rates. It indicates that the negative ions are actually not necessary in the Trichel pulse process, but will influence the pulse waveform significantly.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of trichel pulse of negative corona discharge in N₂–O₂mixture

Xia¹,

Jiang²,

Wang³

et al. 2017

J. Phys. D: Appl. Phys.

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“…Various humidity sensors have been developed based on humidity-sensitive materials such as graphene oxide (Caccami et al 2017), silica nanoparticles (SiO2 NPs) (Kano et al 2018), quartz crystal microbalance (QCM) (Selyanchyn et al 2015), coronene tetracarboxylate (CS)-dodecyl methyl viologen derivative (DMV) nanofibres (Mogera et al 2014), and synthetic redox conducting supramolecular ionic material (SIM) (Yan et al 2016). Other methods in humidity-based RR monitoring include digitally printing graphite ink (Güder et al 2016), a CMOS-MEMS device (Lai et al 2014), and Trichel pulses (TPs) measured by a field ionization sensor consisting of a needle electrode and a plate electrode (Deng et al 2014).…”

Section: Humidity Sensors and Capnometrymentioning

confidence: 99%

Recent development of respiratory rate measurement technologies

et al. 2019

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Respiratory rate (RR) is an important physiological parameter whose abnormality has been regarded as an important indicator of serious illness. In order to make RR monitoring simple to perform, reliable and accurate, many different methods have been proposed for such automatic monitoring. According to the theory of respiratory rate extraction, methods are categorized into three modalities: extracting RR from other physiological signals, RR measurement based on respiratory movements, and RR measurement based on airflow. The merits and limitations of each method are highlighted and discussed. In addition, current works are summarized to suggest key directions for the development of future RR monitoring methodologies.

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“…Despite the long history of the presence of Trichel pulses in science and in practice, the interest in Trichel pulse fundamentals has not declined, mainly due to the increasing number of new applications of the negative corona discharge (e.g. in medicine [19,20], industry [21], and safety issues [22]). Moreover, Trichel pulses still have the potential for new applications to be found.…”

Section: Introductionmentioning

confidence: 99%

Controlled generation of a single Trichel pulse and a series of single Trichel pulses in air

Mizeraczyk¹,

Berendt²,

Akishev³

2018

J. Phys. D: Appl. Phys.

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In this paper, a simple method for the controlled generation of a single Trichel pulse or a series of single Trichel pulses of a regulated repetition frequency in air is proposed. The concept of triggering a single Trichel pulse or a series of such pulses is based on the precise controlling the voltage inception of the negative corona, which can be accomplished through the use of a ramp voltage pulse or a series of such pulses with properly chosen ramp voltage pulse parameters (rise and fall times, and ramp voltage pulse repetition frequency). The proposal has been tested in experiments using a needle-to-plate electrode arrangement in air, and reproducible Trichel pulses (single or in a series) were obtained by triggering them with an appropriately designed voltage waveform. The proposed method and results obtained have been qualitatively analysed. The analysis provides guidance for designing the voltage ramp pulse in respect of the generation of a single Trichel pulse or a series of single Trichel pulses. The controlled generation of a single Trichel pulse or a series of such pulses would be a helpful research tool for the refined studies of the fundamental processes in a negative corona discharge in a single- (air is an example) and multi-phase gaseous fluids. The controlled generation of a single Trichel pulse or a series of Trichel pulses can also be attractive for those corona treatments which need manipulation of the electric charge and heat portions delivered by the Trichel pulses to the object.

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Respiratory Monitoring by a Field Ionization Sensor Based on Trichel Pulses

Cited by 6 publications

References 36 publications

Numerical investigation of trichel pulse of negative corona discharge in N₂–O₂mixture

Numerical investigation of trichel pulse of negative corona discharge in N₂–O₂mixture

Recent development of respiratory rate measurement technologies

Controlled generation of a single Trichel pulse and a series of single Trichel pulses in air

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Respiratory Monitoring by a Field Ionization Sensor Based on Trichel Pulses

Cited by 6 publications

References 36 publications

Numerical investigation of trichel pulse of negative corona discharge in N2–O2mixture

Numerical investigation of trichel pulse of negative corona discharge in N2–O2mixture

Recent development of respiratory rate measurement technologies

Controlled generation of a single Trichel pulse and a series of single Trichel pulses in air

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Numerical investigation of trichel pulse of negative corona discharge in N₂–O₂mixture

Numerical investigation of trichel pulse of negative corona discharge in N₂–O₂mixture