Low-power wide-area network protocols, such as LoRa, Sigfox, and NB Internet of Things, have become a popular technology for long range limited data communication. Those protocols been optimized low power consumption offer competitive subscription prices. This article presents the development an autonomous Sigfox sensor node capable transmitting collected by sensors directly to cloud. The device is powered solar cell can transmit every 5 min under cloudy conditions (<;5000 lx). Such high...

Colorimetric characterisation systems based on LEDs and RBG sensors are straightforward to implement, highly integrable allowing for portable measurement can be constructed using widespread affordable components. They have already proved a satisfactory solution in several applications related chemical analysis. In this paper, we present an RGB sensor-based prototype colorimetric characterisation, which accommodate cuvettes with optical paths of 10 mm 40 mm. We assessed the impact...

Nowadays, electronic devices are more and compact can be integrated in nearly every object. One of the remaining challenges is to provide smarter ways power those devices. Because small amount energy needed by latest ultra-low systems, harvesting from environment becomes a viable solution them. In this work, we present integration an device electrodynamic harvester (EH) shoe. The measures acceleration along one axis at sampling rate 30 Hz sends data second using wireless link. then collected...

In some specific microelectronic applications, there is a demand for adhesive materials (glues/encapsulants) having very good thermal insulation properties. We have studied the properties obtained on epoxy-based samples loaded by several levels of xerogel filling. The conductivity these depends exact chemical composition and their manufacturing process. As result, given in manufacturer's specifications or literature generally exhibits dispersion. Therefore, we developed straightforward...

Metal-oxide (MOX) gas sensors commonly rely on custom packaging solution. With an ever-increasing demand for MOX sensors, there is a clear need low cost, compact and high-performance package. During normal operation, are heated up to temperature in the typical range of 200-300°C. However, generated heat must not damage or degrade any other part assembly. Using 3D finite elements modelling, we developed optimal package configuration. To thermally insulate assembly from sensor have in-house...

Abstract. In this work, we developed and characterised an autonomous micro-platform including several types of sensors, advanced power management unit (PMU) radio frequency (RF) transmission capabilities. Autonomy requires integration energy harvester, storage device, a PMU, ultra-low-power components (including sensors) optimized software. Our choice was to use commercial off-the-shelf with low-power consumption, low cost compactness as selection criteria. For the multi-purpose...

This article presents a review of device processing technologies used in the fabrication biomedical systems, and highlights requirements advanced manufacturing technology. We focus on systems that perform diagnostics fluidic specimens, with analytes are liquid phase. In introduction, we define as well their versatile applications essential current trends. The paper gives an overview most important biomolecules typically must be detected or analyzed several applications. is structured...

There is no industrial method readily available to deposit a functional conductive metal pattern for electronic application on vertical sidewalls of thermal sensitive plastic materials. The most common methods (as dispensing and screen printing example) allow material deposition flat surfaces; other such an ink jet AJP (Aerosol Jet Printing) can accept certain surface curvature eventually some unflattens. In this work we developed demonstrated additive low temperature that silver surfaces...

In this work, we present a new device to monitor the five main vital parameters of hospitalized patients: heart rate (HR), respiratory (RR), blood oxygen saturation, pressure (BP), and temperature. The consists one single unit placed on chest with two electrodes connected patient. continuously acquires electrocardiogram (ECG), three-wavelength photoplethysmogram (PPG), bioimpedance, body temperature, three-axis acceleration. These raw data are securely sent via Wi-Fi access point local...

We designed a 3D geometrical model of metal-oxide gas sensor and its custom packaging used it in finite element modeling (FEM) analysis for obtaining temperature heat flux distribution. The computer simulation, performed with GetDP software (version 3.5.0, 13 May 2022), accurately predicted the distribution variation across entire assembly. Knowing location hot spots allowed us to select best electrical interconnect method choose optimal materials combination geometry. thermal also confirmed...

In this paper, we presented a novel, compact, conceptually simple, and fully functional low-cost prototype of pH sensor with PANI thin film as sensing layer. The deposition process is truly low-cost; it performs from the liquid phase, does not required any specialized equipment, comprises few processing steps. resulting layer has excellent stability, resistance to solvents, bio- chemical compatibility. sensor's part includes only components such red-light-emitting diode (LED) light source,...

Many energy harvesters (EH) deliver an ac voltage and require a rectifier as consequence. This paper describes how the affects power flow transmitted from EH to load tackle different amplitudes. study has been performed using analytical calculations, numerical modeling experiments. To reach maximum transfer, conventional methods apply fraction of open-circuit delivered by EH. In contrast, this points out that optimum operating point must be shifted quantity depending on characteristics....

The paper reports on assembly and integration of MS (microsystems) into fully functional system. We show that among varieties techniques methods commonly used for IC, some can be successfully also the microsystems. are specifically sensitive to thermal exposure occur during process.

This paper reports on a QCM (quartz crystal microbalance) mass sensor under atmospheric pressure that is combined with 3-DOF micromachined coupled resonator operating in vacuum. With nanoparticles consecutively added the QCM, output signals from then modified to produce electrostatic forces which are fed mode localized weakly resonator. The hence utilizes input force as stiffness perturbations perform sensing operation. A comparison of three sensitivity characterization methods was carried...

In this work, we describe a new process of fabrication low-cost silicon wafers which are produced by sintering powder followed Zone Melting Recrystallization (ZMR) step. The influence the ZMR step on physical and chemical characteristics substrate is reported. evolution impurities content along different steps was studied. addition to increase grain size improved crystalline quality, allowed reducing total especially oxygen already present in sintered wafer. Furthermore drastically value...