An Add-On Electronic Device to Upgrade Mechanical Gas Meters into Electronic Ones

Ripoll-Vercellone, Edgar; Ferrandiz, Vicent; Gasulla, Manel

doi:10.3390/proceedings2131094

Cited by 4 publications

(8 citation statements)

References 4 publications

(7 reference statements)

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“…For demonstration purposes, the RF harvester including the MPPT was also employed to power a sensor node intended to upgrade a mechanical gas meter to a smart device [38]. For these tests, the node was programmed to stay in a standby mode, consuming 1.4 µA.…”

Section: Methodsmentioning

confidence: 99%

A Compact Thévenin Model for a Rectenna and Its Application to an RF Harvester with MPPT

Gasulla

Ripoll-Vercellone

Reverter

2019

Sensors

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This paper proposes a compact Thévenin model for a rectenna. This model is then applied to design a high-efficiency radio frequency harvester with a maximum power point tracker (MPPT). The rectenna under study consists of an L-matching network and a half-wave rectifier. The derived model is simpler and more compact than those suggested so far in the literature and includes explicit expressions of the Thévenin voltage (Voc) and resistance and of the power efficiency related with the parameters of the rectenna. The rectenna was implemented and characterized from −30 to −10 dBm at 808 MHz. Experimental results agree with the proposed model, showing a linear current–voltage relationship as well as a maximum efficiency at Voc/2, in particular 60% at −10 dBm, which is a remarkable value. An MPPT was also used at the rectenna output in order to automatically work at the maximum efficiency point, with an overall efficiency near 50% at −10 dBm. Further tests were performed using a nearby transmitting antenna for powering a sensor node with a power consumption of 4.2 µW.

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Section: Methodsmentioning

confidence: 99%

A Compact Thévenin Model for a Rectenna and Its Application to an RF Harvester with MPPT

Gasulla

Ripoll-Vercellone

Reverter

2019

Sensors

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“…A setup was also used to power a sensor node with the RF harvester. The selected sensor node is used to upgrade a mechanical gas meter to a smart device [6]. For the tests, the node was programmed to stay in a standby mode, consuming about 1.4 μA.…”

Section: Methodsmentioning

confidence: 99%

“…At an input power of −10 dBm, the efficiencies of both the rectenna and the MPPT are high, achieving an overall efficiency around 50%. As an application example, the RF harvester is used to power a sensor node that forms part of a smart gas meter [6]. Figure 2a shows the schematic circuit of the rectenna, which includes an antenna, a high-pass Lmatching network (composed of a capacitor Cm and an inductor Lm), a half-wave rectifier and an output filtering capacitor (Co).…”

Section: Introductionmentioning

confidence: 99%

A High-Efficiency RF Harvester with Maximum Power Point Tracking

et al. 2018

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This paper presents the implementation of a high-efficiency radiofrequency (RF) harvester, which consists of a rectenna and a maximum power point tracker (MPPT). The rectenna was characterized from −30 dBm to −10 dBm at 808 MHz, achieving an efficiency higher than 60% at −10 dBm. Experimental results also show that the rectenna can be well modelled as a Thévenin equivalent circuit, which allows the use of a simple ensuing MPPT. The complete RF harvester was tested, achieving an overall efficiency near 50% at −10 dBm. Further tests were performed powering a sensor node from a nearby antenna.

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“…Internal interruption signals come from embedded timers and are used by the MCU to carry out periodic tasks [1], [2]. External interruption signals come from, among others, the same sensors in charge of the measurement [3], secondary low-power sensors [4], alarm events [5], or remote radiofrequency (RF) signals that trigger a wake-up receiver of the sensor node [6].…”

Section: Introductionmentioning

confidence: 99%

LED-Based Wake-Up Circuit for Microcontrollers

Ripoll-Vercellone¹,

Reverter

Gasulla

2020

IEEE Trans. Instrum. Meas.

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This paper proposes, analyzes, and tests a wake-up circuit for a microcontroller (MCU) that uses a LED, operating as a photodetector, illuminated by a smartphone flashlight. The wake-up circuit consists of a high-pass filter and a voltage level translator that interfaces the LED, with a suitable resistor in parallel, to the MCU. When illuminated by a switching flashlight, the LED generates a square voltage that is conveniently converted in logic levels at the output of the wake-up circuit. A firmware embedded into the MCU additionally checks that a predetermined sequence of logic pulses at a given rate is accomplished to activate the MCU. The paper includes a theoretical analysis and experimental results that validate the proposed circuit.

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An Add-On Electronic Device to Upgrade Mechanical Gas Meters into Electronic Ones

Cited by 4 publications

References 4 publications

A Compact Thévenin Model for a Rectenna and Its Application to an RF Harvester with MPPT

A Compact Thévenin Model for a Rectenna and Its Application to an RF Harvester with MPPT

A High-Efficiency RF Harvester with Maximum Power Point Tracking

LED-Based Wake-Up Circuit for Microcontrollers

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