Low-Power Self-Energy Meter for Wireless Sensor Network

Fernández, Carlos Sánchez; Bouvier, Diego A.; Villaverde, Jorge; Steinfeld, Leonardo; Oreggioni, Julian

doi:10.1109/dcoss.2013.69

Cited by 7 publications

(1 citation statement)

References 3 publications

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“…Similar to the voltage-to-frequency conversion method the temporal resolution depends on the actual current flow. [7] presents another measurement method and circuit called self-energy meter, basically a combination of both a voltage-to-frequency conversion and a coulomb counter. Our power measurement system offers a temporal resolution independent of the actual current flow and offers a higher sampling rate combined with a lower measurement error over the whole dynamic range compared to the existing approaches.…”

Section: Related Workmentioning

confidence: 99%

A power measurement system for accurate energy profiling of embedded wireless systems

Potsch

Berger

Leitner

et al. 2014

Proceedings of the 2014 IEEE Emerging Technology and Factory Automation (ETFA)

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In this paper, we present a highly accurate but still cost-effective measurement solution for tracking the highly dynamic power consumption of wireless embedded systems. We extended the conventional measurement of a single shunt resistor's voltage drop by using a dual shunt resistor stage with an automatic switch-over between both stages, which leads to a large dynamic measurement range of 50 dB (1 µA to 100 mA) with an average measurement error smaller than 1.2 %. Using two zero-drift current sense amplifiers for measuring the voltage drop over two different sized shunt resistors together with a 16 bit SAR ADC for each of both amplifiers leads to a far better thermal noise behaviour and a higher total measurement resolution compared to a single shunt solution, providing a minimum invasive measurement system with a maximum voltage drop of 100 mV. Using a state-of-the-art Ethernet connection allows our measurement system to forward the power samples with up to 250 kHz sampling rate to any remote networked computer.

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Section: Related Workmentioning

confidence: 99%

A power measurement system for accurate energy profiling of embedded wireless systems

Potsch

Berger

Leitner

et al. 2014

Proceedings of the 2014 IEEE Emerging Technology and Factory Automation (ETFA)

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Self-energy meter in duty-cycle battery operated sensor nodes

Villaverde¹,

Steinfeld²,

Oreggioni³

et al. 2014

2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings

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Reduced levels of energy consumption is one of the major goals in Wireless Sensor Networks (WSNs), making the design of a sensor node a challenging task. On-field realtime measurement of the energy consumption of sensor nodes could have a major impact on developing wireless networks. It could be applied to predict the remaining battery charge or to asses the energy efficiency of communication protocols. However, designing such a system presents many challenges that will be discussed in this work. Moreover, we present a measurement method and circuit, named self-energy meter (SEM), that easily adds to a sensor node the capability of measuring its own energy consumption. SEM is a novel approach focused in solving the problem of covering a dynamic range of five decades in dutycycle battery operated sensor nodes. Experimental results show that SEM has very low power consumption, ensuring an almost negligible impact in the battery lifetime, is highly linear, presents a very low temperature drift, and is almost independent of the power supply.

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