Search results for "Wireless sensing"

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A Trajectory-Driven 3D Channel Model for Human Activity Recognition

2021

This paper concerns the design, analysis, and simulation of a 3D non-stationary channel model fed with inertial measurement unit (IMU) data. The work in this paper provides a framework for simulating the micro-Doppler signatures of indoor channels for human activity recognition by using radiofrequency-based sensing technologies. The major human body segments, such as wrists, ankles, torso, and head, are modelled as a cluster of moving point scatterers. We provide expressions for the time variant (TV) speed and TV angles of motion based on 3D trajectories of the moving person. Moreover, we present mathematical expressions for the TV Doppler shifts and TV path gains associated with each movin…

Channel transfer functionGeneral Computer ScienceComputer scienceInternet of ThingsComputació centrada en humansDoppler EfecteActivity recognitionsymbols.namesakespectrogramInertial measurement unitVDP::Teknologi: 500::Medisinsk teknologi: 620Channel measurementsnon-stationary fading channelsmedicineGeneral Materials ScienceComputer visionNon-stationary fading channelsReconeixement de formes (Informàtica)channel state informationSpectrogrambusiness.industryWireless sensingGeneral Engineering:Enginyeria de la telecomunicació::Processament del senyal::Reconeixement de formes [Àrees temàtiques de la UPC]TorsoInertial measurement unitsExpression (mathematics)TK1-9971Time-variant Doppler power characteristicsmedicine.anatomical_structureChannel state informationHuman-centered computingchannel transfer functiontime-variant Doppler power characteristicsTrajectorysymbolsChannel state informationSpectrogramMicro-Doppler signature:Informàtica::Intel·ligència artificial [Àrees temàtiques de la UPC]Electrical engineering. Electronics. Nuclear engineeringArtificial intelligenceHuman activity recognitionbusinessDoppler effect
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Real time assessment of hand-arm vibration system based on capacitive MEMS accelerometers

2012

Vibrations are a well known potential cause of health diseases and therefore constitute a main concern for the safety of workers in a large number of activities. In order to prevent health hazards, national and international institutions have issued laws and directives which establish recommended limits to the workers' exposure to vibrations during operations. Consequently, if the amount of adsorbed vibration exceeds the allowable daily limits the worker has to stop his job. Recent wireless sensing and communicating technologies can effectively be employed for such purpose, allowing to develop monitoring customized devices at affordable cost which could be easily employed during the workers…

Engineeringbusiness.industryEmerging technologiesCapacitive sensingWireless sensing technologySettore AGR/09 - Meccanica AgrariaWearable computerhand-arm vibration MEMS acceleration-sensor wireless sensing technology health risk assessmentForestryContext (language use)HorticultureAccelerometerComputer Science ApplicationsReliability engineeringHealth risk assessmentMEMS acceleration-sensorHand-arm vibrationOrder (exchange)Computer data storageWirelessbusinessAgronomy and Crop ScienceSimulation
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