Search results for "anturit"

Aikasynkronointi langattomissa anturiverkoissa

2009

The Internet of Things for Applications in Wearable Technology

2022

The advent of the Internet of Things (IoT) era has propelled the development of wearable technology. Wearable devices are widely used in medical, healthcare, sports, and safety applications, bringing more convenience to the living environment. Wearable devices can be worn on the body, collect body data using sensors, and process the collected data to obtain valuable information. IoT enables devices to connect and exchange and transmit data. Wearable devices in IoT can collect data for analysis and automatically adjust wearable device functions by connecting the obtained information to other devices. In this paper, we collect and organize articles on wearable devices used in IoT from 2017 to…

Puettava teknologia valmennuksen tukena

2022

Sensoriteknologia on jo melko laajasti käytössä valmennuksessa. Lopullinen läpimurto on kuitenkin vasta tulossa. nonPeerReviewed

Sensor Technology for Sports Monitoring

2023

Over the past decades, huge steps have been made in the development of sensor technology related to sports monitoring [...]

Kiihtyvyysanturien käyttö mäkihypyn ponnistusnopeuden määrityksessä

2006

Tutkielman tavoitteena oli selvittää kiihtyvyysanturien soveltuvuutta mäkihypyn ponnistusnopeudenmittaamiseen. Kiihtyvyysantureilla voitaisiin mahdollisesti vähentäämittauksiin ja analysointiin kuluvaa aikaa ja taloudellisia resursseja verrattuna aiemminkäytettyihin menetelmiin. Ensimmäisessä vaiheessa mitattiin yhden koehenkilön kelkkaergometrissasuoritettujen hyppyjen (14 kpl) ponnistusnopeudet kiihtyvyysanturiltaja vertailunopeudet ponnistusetäisyyden ja voimasignaalin avulla. Anturilta laskettiinlineaarisen kiihtyvyyden kuvaaja liikesuuntaan ja integroitiin se lähtönopeuden selvittämiseksi.Toisessa vaiheessa nuoren maajoukkuetason hyppääjän suorituksia tallennettiin3 kappaletta Vuokatin…

Emotions and Activity Recognition System Using Wearable Device Sensors

2021

Nowadays machines have become extremely smart, there are a lot of existing services that seemed to be unexpectable and futuristic decades or even a few years ago. However, artificial intelligence is still far from human intelligence, machines do not have feelings, consciousness, and intuition. How can we help machines to learn about human feelings and understand their needs better? People take their devices wherever they go, what can devices tell us about their owners? Personal preferences and needs are dependent on emotional and situational contexts. Therefore, emotional and activity aware gadgets would be more intuitive and provide more appropriate information to users. Contemporary weara…

Efficiency of temporal sensor data compression methods to reduce LoRa-based sensor node energy consumption

2022

Purpose Minimizing the energy consumption in a wireless sensor node is important for lengthening the lifetime of a battery. Radio transmission is the most energy-consuming task in a wireless sensor node, and by compressing the sensor data in the online mode, it is possible to reduce the number of transmission periods. This study aims to demonstrate that temporal compression methods present an effective method for lengthening the lifetime of a battery-powered wireless sensor node. Design/methodology/approach In this study, the energy consumption of LoRa-based sensor node was evaluated and measured. The experiments were conducted with different LoRaWAN data rate parameters, with and without …

Nanotieteen ja -teknologian hyödyntäminen ääreishermostollisessa ylemmän raajan neuroprostetiikassa

2017

Tämä kirjallisuuskatsaus pyrkii luomaan realistisen kuvan tämän hetkisestä neuroprostetiikan alasta ja sen tulevaisuudesta, perehtymään alan ongelmiin, luomaan yhteyden nanoteknologian ja neuroprostetiikan välille ja miettimään miten ja mitä neuroprostetiikan ongelmia voitaisiin ratkaista nanoteknologialla. Suurin ongelma intuitiivisen hallinnan ja sitä kautta luonnollisen tuntuisen keinotekoisen käden saavuttamiseksi on ihmisen ja proteesin välisen yhteyden rajapinta. Nykyiset elektrodit, joilla yhteys muodostetaan ovat hermoston rakenteeseen suhteutettuna suuria ja todellisuudessa epäspesifejä. Nanoteknologian avulla käytettävien elektrodien kokoa voitaisiin pienentää,…

Reflectance Measurement Method Based on Sensor Fusion of Frame-Based Hyperspectral Imager and Time-of-Flight Depth Camera

2022

Hyperspectral imaging and distance data have previously been used in aerial, forestry, agricultural, and medical imaging applications. Extracting meaningful information from a combination of different imaging modalities is difficult, as the image sensor fusion requires knowing the optical properties of the sensors, selecting the right optics and finding the sensors’ mutual reference frame through calibration. In this research we demonstrate a method for fusing data from Fabry–Perot interferometer hyperspectral camera and a Kinect V2 time-of-flight depth sensing camera. We created an experimental application to demonstrate utilizing the depth augmented hyperspectral data to measu…

Improving Energy Expenditure Estimation in Wrist-Worn Wearables by Augmenting Heart Rate Data With Heat Flux Measurement

2021

Wearable electronics are often used for estimating the energy expenditure of the user based on heart rate measurement. While heart rate is a good predictor of calorie consumption at high intensities, it is less precise at low intensity levels, which translates into inaccurate results when estimating daily net energy expenditure. In this study, heart rate measurement was augmented with heat flux (HF) measurement, a form of direct calorimetry. A physical exercise test on a group of 15 people showed that HF measurement can improve the accuracy of calorie consumption estimates especially during rest and low-intensity activity when used in conjunction with heart rate information and vital backgr…