Highly stretchable strain sensors based on carbon nanotube (CNT)-reinforced Ecoflex silicone rubber are developed for breathing monitoring purposes. The addition of CNTs promotes an improvement in electrical conductivity and mechanical properties (Young's modulus tensile strength) due to its good dispersion Ecoflex. evaluation response, both compression conditions, indicates a wide detection range ultrasensitive response at high levels, reaching gauge factor around 104 70% or 105 300% 0.3...

The present work proposes a flexible framework for the deployment of real remote laboratories (RRLs). These kinds laboratory allow students to access hands-on experiences and experiments through an online platform, eliminating geographical time constraints associated with traditional on-site laboratories. This innovative approach has proven especially valuable in STEM disciplines (Science, Technology, Engineering, Mathematics), where practice interaction specialised equipment are critical...

In this paper, we characterize and measure the effects of errors introduced by multipath when obtaining position an agent means Indoor Positioning Systems (IPS) based on optical signal. These are characterized in Local (LPSs) two different techniques: first one determining Angle Arrival (AoA) infrared signal (IR) to detector; second working with measurement Phase shift from transmitter a receiver (PoA). We present obtained results conclusions, which indicate that using Position Sensitive...

Here, we present an indoor positioning system (IPS) for detecting mobile agents based on a single Position Sensitive Device sensor (PSD) sited in the environment and InfraRed Emitter Diode (IRED) located agents. The main goal of work is to develop alternative IPS other sensing technologies, cheaper, easier install with low computational load obtain high rate measurements per second. proposed has capacity accurately determine 3D position from angle arrival (AoA) signal received at PSD sensor....

In this paper, we explore the use of visible light positioning (VLP) technology in vehicles intelligent transportation systems (ITS), highlighting its potential for maintaining effective line sight (LOS) and providing high-accuracy between vehicles. The proposed system (V2V-VLP) is based on a position-sensitive detector (PSD) exploiting car taillights to determine position inter-vehicular distance by angle arrival (AoA) measurements. integration PSD sensor promises exceptional accuracy,...

There are several technologies and techniques available when developing indoor positioning systems (IPS). Recently, the development of based on optical signals has aroused great interest, mainly those using visible light from lighting infrastructure. In this work, we analyze which give better results to lay foundations for a Visible Light Positioning system (VLP). Working only with receiver, it is analyzed what result determining position different emitters they emit simultaneously without...

In this paper, we propose a model to characterize Infrared (IR) signal reflections on any kind of surface material, together with simplified procedure compute the parameters. The works within framework Local Positioning Systems (LPS) based IR signals (IR-LPS) evaluate behavior transmitted Multipaths (MP), which are main cause error in IR-LPS, and makes several contributions mitigation methods. Current methods physics, optics, geometry empirical methods, but these do not meet our requirements...

Reduced deployment and calibration requirements are key for scalable cost-effective indoor positioning systems. In this work, we propose a low-complexity, weak procedure an system based on infrastructure lighting positioning-sensitive detector. The proposed relies genetic algorithms to obtain the relevant parameters in real environment without priori information, requires low number of simple measurements. achievable performance proposal was assessed by direct comparison with formal offline...

Here, we propose a model to determine the effect of multipath in indoor environments when shape and characteristics environment are known. The main paper goal is signal formation solve, as much possible, negative effects light communications, well positioning errors due this phenomenon using optical signals. methodology followed was: analyze phenomenon, establish theoretical approach different models characterize behavior channel, emitter receiver. channel impulse response received strength...

Unlike GNSS-based outdoor positioning, there is no technological alternative for Indoor Positioning Systems (IPSs) that generally stands out from the others. In indoor contexts, measurement technologies and localization strategies to be used depend strongly on application requirements are complementary each other. this work, we present an optical IPS based a Position-Sensitive Detector (PSD) exploiting illumination infrastructure determine target position by Angle of Arrival (AoA)...

This study unveils a mobile app-based Indoor Positioning System (IPS) tailored for seamless museum navigation. Leveraging smartphone Inertial Measurement Unit (IMU) sensors, it incorporates Pedestrian Dead Reckoning (PDR) algorithm and Visible Light (VLP) beacon-based Angle of Arrival (AoA) precise user positioning relative to smart light sources. In standalone mode, the VLP AoA-based demonstrates reliability with mean error 10.64 cm, while PDR algorithm, operating independently, exhibits 3...

Vehicular communication based visible light presents an excellent solution to ensure road safety and transportation efficiency in critical environments like tunnels, underground garages, or covered parking lots where traditionally RF solutions cannot provide efficient communication. In this paper, we propose a new multipath channel model for V2V-VLC unfavorable situations tunnels by using PSD sensor. The performance of the derived is evaluated statistical measures on numerical simulations...

In indoor localization there are applications in which the orientation of agent to be located is as important knowing position. this paper we present results estimation from a local positioning system based on position-sensitive device (PSD) sensors and visible light emitted illumination room it located. The will require that PSD sensor receives signal either 2 or 4 sources simultaneously. As shown article, error determining rotation angle with on-board less than 0.2 degrees for two...

This paper shows a system and method for indoor positioning based on the LED lighting installed environment. The proposal is modulation of visible light signal emitted in frequencies ranging from 50 to 200 kHz detection by means PSD (Position Sensitive Detector) photodiode. describes mathematical modelisation proposed Indoor Positioning System (IPS), considering that detector will move planar surface. Several synthetic results are shown distances 1 3 meters between source detector. technique...

This works presents advances in the characterization of multipath (MP) effects Indoor Positioning Systems (IPS) using Position Sensitive Devices (PSD). The positioning errors introduced by MP are characterized while determining Angle Arrival (AoA) an infrared signal (IR) to PSD detector. From obtained results it can be concluded that AoA on PSDs have a reduced impact measurements.

This paper focuses on determining the optimum placement of a given number sensors for estimating position moving target using range-difference measurements. We define region interest and generate several random trajectories with dynamic white noise acceleration model. After obtaining those that populate area we compute posterior Cramér-Rao lower bound iteratively each instant trajectory. Using can obtain global measure mean squared error estimate use it as an objective function to be...

In this work, we have studied the integration of an optical signal-based Indoor Positioning System (IPS) capable supporting multi-access discrimination techniques. The research analyzes different techniques and conditions that can be used to develop IPS using a microcontroller unit (MCU)-based system-on-chip (SoC) systems. main goal is able integrate into MCU both hardware software requirements for detector. way, strategies implement Frequency-division multiple access (FDMA) been tested,...

Indoor Positioning Systems (IPS) usually require a calibration process to obtain precise measurements. In the case of systems with optical components, may be time-consuming and requires specific infrastructure. this paper, we present model method for an sensor based on Direct Linear Transformation (DLT), which directly obtains transformation between surface moving agent. Our provides results similar those that would obtained optimal calibration, differences only are few mm.

In indoor localization there are applications in which the orientation of agent to be located is as important knowing position. this paper we present results estimation from a Local Positioning System based on Position Sensitive Device (PSD) sensors and visible light emitted illumination room it located. The will require that PSD sensor receives signal 2 sources simultaneously. As shown article, error determining rotation angle with on-board less than 0.2 degrees. accuracy measurement has...