Abstract
The advent of smart measurement systems and innovative wireless sensor networks evinces the necessity to develop novel solutions for conditioning circuits to be used in autonomous or quasi autonomous measurement systems and sensing nodes. The main problem these systems still face is the question of how to supply the nodes in a cost-effective way, considering that, very often, a battery is required, and consequently, the maintenance labor and cost to replace or recharge it may be high. The main target is to increase battery lifetime by decreasing unnecessary energy consumption as much as possible. In this context, several solutions, including energy harvesters, have already been proposed. One of the main solutions is the reduction of power consumption by the measurement device while in standby, which, in most cases, represents a significant amount of the total power dissipation. To this end, authors have already addressed a zero-energy standby solution able to supply the power requested by the measurement equipment only when the appliance is turned on. In this paper, we present an integrated circuit solution suitable to be used with MEMS scale transducers. The validation and the characterisation of the system will be shown to demonstrate the suitability of the proposed method.
Highlights
INTRODUCTIONIn response to the advent of emerging technology such as IoT, Industry 4.0 and smart solutions in electronics and measurement, an interesting development has recently appeared regarding ultra-low-power solutions, self-powered methods, energy harvesting and novel conditioning circuits for sensors and transducers [1]-[4]
In response to the advent of emerging technology such as IoT, Industry 4.0 and smart solutions in electronics and measurement, an interesting development has recently appeared regarding ultra-low-power solutions, self-powered methods, energy harvesting and novel conditioning circuits for sensors and transducers [1]-[4].The common goal is to realise a sensing node having the prerogative to absorb small amounts of electrical power
We addressed a zero-energy standby solution that is able to supply the power required by the measurement equipment to turn on an appliance only when needed
Summary
In response to the advent of emerging technology such as IoT, Industry 4.0 and smart solutions in electronics and measurement, an interesting development has recently appeared regarding ultra-low-power solutions, self-powered methods, energy harvesting and novel conditioning circuits for sensors and transducers [1]-[4]. Various strategies have been addressed in order to reduce maintenance issues in measurement systems that are often disseminated Some solutions, such as those implementing real time sensors, may require batteries; other systems, such as low duty cycle sensors and measurement architectures, may be able to function appropriately without batteries in specific working conditions [9]-[14]. ACTA IMEKO | www.imeko.org components that supply the microcontroller unit (MCU) and the front-end transmission, such as Bluetooth and RF [17] For this reason, power management circuits are permanently on in standby, and, depending on the duty cycle, can consume unnecessarily high percentages of battery charge [18], [19]. This study used a device based on PiezoMUMPs technology [24], which represents an interesting solution in order to realise self-generating integrated sensors This family of device can produce output voltages from tens to a few hundreds of mV.
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