Over the years, several QRS complex detection algorithms have been proposed with different features, but remaining problem is their implementation in low-cost portable platforms for real-time applications, where hardware resources are limited, still providing accuracy level required medical applications. The algorithm copes at same time both requirements: 1) and 2) low resource consumption. In this paper, a detector proposed. This based on differentiation pre-processing stage combined...

The massive deployment of smart meters and other customized has motivated the development nonintrusive load monitoring (NILM) systems. This is process disaggregating total energy consumption in a building into individual electrical loads using single-point sensor. Most literature oriented to saving. Nevertheless, activity daily livings through NILM recently receiving much interest. proposal presents an event-based algorithm high performance for applications. divided two stages: 1) event...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> As the number of wind power applications with electronic interfaces in grid increases, it is becoming unacceptable to disconnect generating units every time disturbances occur, especially under voltage dips, as was a common practice past. Keeping converter online during unbalanced voltage, and guaranteeing actual standards connected grid, very critical issue. From these goals, design robust...

New energy concepts such as distributed power generation systems (DPGSs) are changing the face of electric distribution and transmission. Power electronics researchers try to apply new electronic controller solutions with capacity implementing more complex control algorithms combined internal high-speed communication interfaces. Thus, it is possible monitor, store, transfer a large number variables that can be sent online local or remote hosts in order take set points different units. With...

Ultra-Wideband (UWB) has a high interest in research and industry for accurate indoor positioning. This technology comprises signals with bandwidth of at least 500 MHz power decay −10dB. large con-feres the capability resolving multipath, penetrating through obstacles ranging. However, NLOS (Non-Line-Of-Sight) conditions produced by environments severely degrade performance, as they introduce positive bias ranging estimation. In this paper we present robust UWB positioning which is able to...

Acoustic local positioning systems (ALPSs) are an interesting alternative for indoor due to certain advantages over other approaches, including their relatively high accuracy, low cost, and room-level signal propagation. Centimeter-level or fine-grained can be asset robot navigation, guiding a person to, instance, particular piece in museum specific product shop, targeted advertising, augmented reality. In airborne system applications, acoustic based on using opportunistic signals sounds...

The ageing of the population, and their increasing wish living independently, are motivating development welfare healthcare models. Existing approaches based on direct heath-monitoring using body sensor networks (BSN) precise accurate. Nonetheless, intrusiveness causes non-acceptance. New seek indirect monitoring through activities daily (ADLs), which proves to be a suitable solution. ADL systems use many heterogeneous sensors, less intrusive, expensive than BSN, however, deployment...

Cognitive impairment diseases are becoming more and prevalent mainly due to population aging the increase in life expectancy. Sensory monitoring systems may allow people with mild cognitive impairments (MCIs) or at early stages of dementia live home for longer independence security. This work presents a wireless sensor network (WSN) based on wearables that obtains indoor outdoor location step information, reporting them over long-range WAN (LoRaWAN) network. Each wearable (WWS) uses global...

In recent applications based on ultrasound, several ultrasonic transducers have been geometrically and electronically associated to constitute a global sensor. There are different methods used process the signals obtained from these transducers. this work, multimode techniques using Golay complementary sequences proposed for processing signal. The system increases scan rate, precision, reliability. It is also capable of echo discrimination, allowing simultaneous measurements be made...

The massive deployment of smart meters in most Western countries recent decades has allowed the creation and development a significant variety applications, mainly related to efficient energy management. information provided about consumption also been dedicated areas social work health. In this context, are considered single-point non-intrusive sensors that might be used monitor behaviour activity patterns people living household. This describes design short-term behavioural alarm generator...

Non-Intrusive Load Monitoring (NILM) includes a set of methods orientated to disaggregating the power consumption household per appliance. It is commonly based on single metering point, typically smart meter at entry electrical grid building, where signals interest, such as voltage or current, can be measured and analyzed in order disaggregate identify which appliance turned on/off any time. Although this information key for further applications linked energy efficiency management, it may...

The increasing demand for efficient energy management in smart grids has led to the development of various Non-Intrusive Load Monitoring (NILM) techniques. These aim disaggregate consumption and classify appliances using data from a single-point meter at household's grid mains. With use machine learning methods, NILM solutions increasingly rely on datasets training validation. While like WHITED, BLOND, UK-DALE provide insights into patterns, they face limitations such as lack steady-state...

Golay sequences and complementary sets of have been long studied for their application in multisensor communication systems. The feasibility these systems strongly depends on the design an efficient generator correlator with aim reducing computational load hardware complexity. Recursive algorithms, which allow architectures, are available case pairs four sequences. This work presents a generalization algorithms purpose obtaining M length L, number being power two (M=2 <sup...

In the last years, indoor positioning systems have become an ubiquitous part of smart spaces. The use coded ultrasonic leads to accurate position estimation at reduced cost as low propagation speed sound allows analog-to-digital converters sampling frequencies. these systems, coding schemes play a key role in accuracy and robustness range and, therefore, positioning. Consequently, careful selection design appropriate transmitted waveform should be carried out. This paper introduces two novel...

Visible light positioning systems (VLPSs) are a feasible alternative to local due the technology improvement and massive use of light-emitting diodes (LEDs). Compared other technologies, VLPSs can provide significant advantages, such as achieved accuracy, although they still present some issues, mainly related reduced coverage area or high computational load. This article proposes design VLPS based on four LED lamps transmitters quadrant photodiode angular diversity aperture (QADA) receiver....

The ageing of the population has raised interest in homecare monitoring systems and assisted living recent years. Most studies pursue non-intrusiveness scalability to meet requirements this ever-growing community. Nonetheless, they are still limited by technique: wearables need be carried sensor networks imply installation. This work presents new solutions monitor elderlies using one single sensor: smart meter or another similar device. enables a level non-intrusiveness. Likewise,...

Electricity disaggregation is the process of separating total electrical load a single household into appliance specific loads. This can be achieved either by intrusive monitoring each via individual device meters or employing Non-Intrusive Load Monitoring (NILM) techniques, that perform detailed analysis current and voltage load, typically measured at interface to power source. NILM techniques are becoming recognized tools for several applications, from which their use in Home Energy...

Indoor positioning remains a challenge and, despite much research and development carried out in the last decade, there is still no standard as with Global Navigation Satellite Systems (GNSS) outdoors. This paper presents an indoor system called LOCATE-US adjustable granularity for use commercial mobile devices, such smartphones or tablets. privacy-oriented allows every device to compute its own position by fusing ultrasonic, inertial sensor measurements map information. Ultrasonic Local...

In this work, several code division multiple access encoding schemes are evaluated for their application in ultrasonic sensory systems based on the determination of times-of-flight. Proper improves performance such terms noise immunity, capability simultaneous measurements and precision distance measurements. Important applications that include encoded signals obstacle detection, local positioning ubiquitous computing or non-destructive testing. Here, Kasami, Golay Loosey synchronous codes...

On current railway systems, it is becoming ever more necessary to install safety elements avoid accidents. One of the causes that can provoke serious accidents existence obstacles on tracks, either fixed or mobile. In this paper, a multisensory system inform monitoring about proposed. The for obstacle detection consists two emitting and receiving barriers, which are placed opposing sides railway, respectively, use infrared ultrasonic sensors, thus establishing different optical acoustic...

In this article, a time-of-flight detection technique in the frequency domain is described for an ultrasonic local positioning system (LPS) based on encoded beacons. Beacon transmissions have been synchronized and become simultaneous by means of DS-CDMA (direct-sequence code Division multiple access) technique. Every beacon has associated to 255-bit Kasami code. The signal arrival instant at receiver, from which distance each can be obtained, application generalized cross-correlation (GCC),...