Concept and experimental evaluation of a novel DC- 100MHz wireless oscilloscope

Lobsiger, Yanick; Ortiz, Gabriel; Bortis, Dominik; Kolar, Johann W.

doi:10.1109/ipec.2014.6869755

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…This proves the effectiveness of the provided measures to decouple i CM from the sensitive measurement path. A comparison of the presented system's CMRR with the WiScope [25] reveals an improvement of ≈ 40 dB over a very wide frequency range. The WiScope CMRR (darkblue curve in Fig.…”

Section: A Frequency-domain Characterizationmentioning

confidence: 92%

“…Unfortunately, such a port is not provided on most oscilloscopes. Therefore, the WiScope, a battery-powered isolated oscilloscope presented in [25], uses a Bluetooth wireless data channel to connect to a host device. Thanks to the Bluetooth interface, basically any device with corresponding GUI software (computer, laptop, tablet, etc.)…”

Section: A Operating Principle Of Existing Solutionsmentioning

confidence: 99%

“…Galvanically isolated measurements are widely used in Medium-Voltage (MV) applications and in harsh environments, exposed to high noise, switching surges and interferences [20], demanding for robust measurement systems, e.g., in plasma physics experiments [21], in HV electric substations to quantify the electromagnetic compatibility [22] or to assess the quality of the power distribution grid [23]. An optical link (analog or digital) is mostly used as isolated transmission channel [20], [21], [23] but also wireless communication channels have been investigated [24], [25].…”

Section: Introductionmentioning

confidence: 99%

“…Fig.10. Influence of different measures listed in Section III-B on the achievable CMRR (16 cm long tip cable attached in all cases) and comparison with the WiScope[25]. For easier comparison with Fig.3, 1/CMRR is plotted.…”

mentioning

confidence: 99%

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High-Bandwidth Isolated Voltage Measurements With Very High Common Mode Rejection Ratio for WBG Power Converters

Niklaus

Bonetti

Stäger

et al. 2022

IEEE Open J. Power Electron.

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Galvanically isolated voltage measurements are becoming increasingly important for the characterization of converter systems with fast switching Wide-Bandgap (WBG) semiconductors. A very high Common Mode Rejection Ratio (CMRR) > 80 dB for frequencies up to several tens of MHz is required to accurately measure, e.g., the high-side gate-source or drainsource voltage in a half-bridge, or voltages on floating potentials as, e.g., found in multi-level converters. Common to all listed measurement scenarios is the fast changing reference potential, which acts as Common Mode (CM) disturbance. This article derives the minimum necessary CMRR at different frequencies to constrain the time-domain measurement error below a certain limit. Thereby, only the switched voltage and the voltage transition rate (dv/dt) of the CM disturbance are to be considered and not the actual converter switching frequency f sw . Afterwards, a galvanically isolated measurement system with a CMRR > 100 dB up to 100 MHz and an analog measurement bandwidth of 130 MHz is presented. Critical design aspects to achieve this performance are investigated. Compared to commercially available isolated voltage probes, the presented measurement system does not require any additional equipment like an oscilloscope to perform and visualize measurements, since the data is already digitized/sampled and thus can be transmitted directly to a host device (e.g., computer or monitoring system) with corresponding Graphical User Interface (GUI) software. Experimental verification in frequency-and timedomain confirms that the performance is on par with the best commercially available isolated voltage probes.

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Section: A Frequency-domain Characterizationmentioning

confidence: 92%

Section: A Operating Principle Of Existing Solutionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

High-Bandwidth Isolated Voltage Measurements With Very High Common Mode Rejection Ratio for WBG Power Converters

Niklaus

Bonetti

Stäger

et al. 2022

IEEE Open J. Power Electron.

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“…In [11][12][13][14], similar solutions to our design were described; however, they were implemented mostly for educational purposes. Disadvantages and advantages of WPANs utilizations for the purposes of remote metering were investigated in [15][16][17][18][19].…”

Section: Mobile Information Systemsmentioning

confidence: 99%

Multichannel Recorder for Low Frequency Signals: Application of Oscilloscope as Integrated Mobile Service for a Smartphone

Kochláň

Zak

Hodoň

et al. 2016

Mobile Information Systems

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Data acquisition and processing are well known for some time. Many applications use powerful hardware to acquire, process, and visualize signal waveforms. But there are some applications that do not have to perform high resolution signal acquisition and process large amount of data, for example, low frequency applications of embedded design and applications for remote power grid monitoring. The paper describes special system for low frequency signal data sample acquisition, processing, and visualization implemented as a service on Android-based smart device. The service makes smart device functioning as an oscilloscope or arbitrary waveform generator which is accessible remotely through Bluetooth. The design respects low power consumption requirements, simplicity, and user friendliness in application design. Application scenario was implemented as wireless data acquisition system for power grid monitoring.

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