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Niskoenergetyczne bezprzewodowe personalne sieci sensorowe

Stępień J., Kołodziej J., Machowski W.

Przegląd Elektrotechniczny

2017

R. 93, nr 2

198--201

W artykule przedstawiono dwa spośród szerokiej gamy protokołów bezprzewodowych, personalnych sieci sensorowych – ANT/ANT+ oraz Smart Bluetooth (BLE). Protokoły te należą obecnie do najpowszechniej używanych, a ich popularność jest związana z faktem, iż większość urządzeń mobilnych (tabletów i smartfonów) jest wyposażona w interfejsy obsługujące te standardy. Skoncentrowano się na porównaniu obu protokołów oraz przedstawianiu struktury systemu monitoringu aktywności węzła sieci, opartego na uniwersalnym module transmisyjnym BLE/ANT.

In the paper two from many different personal wireless sensor networks standards, namely ANT/ANT+ and Smart Bluetooth (BLE) are presented. Both are currently most popular and it is because vast majority of mobile devices (smartphones and tablets) are equipped with interfaces supporting this standards. Emphasis is put on comparative study of both protocols and description of activity monitoring system proposal based on universal BLE/ANT transmission module.

Transmission of biomedical data from BIOSIP modules in a wireless personal area network with synchronous measurements, and the future use in the internet of things

Szuster B., Szczurek Z., Kowalski P., Kubik B., Michnik A., Wiśniowski R., Świda K.

International Journal of Microelectronics and Computer Science

2016

Vol. 7, nr 1

33--40

The paper aims to present the organizational concept of the wireless personal area network (WPAN network) transmitting biomedical data, used in the BioSip system. The network transmits data from recording modules arranged on the subject's body to a collective node (data integrator). At the same time, all the necessary properties are maintained, i.e. low power consumption of the modules, increased resistance of the network to artefacts, the required transmission speed and signal delays. The options to synchronize measurements in various modules have also been presented, along with the resulting benefits. The wireless personal area network of BioSip modules may be based on various communication protocols, such as Bluetooth Smart or ANT. The BioSip network builds on its own protocol based on transmission mechanisms by Nordic. The software of BioSip modules may be adapted for operation in the Internet of Things through network protocol layers made available by Nordic.

A Study of the Detonation Properties, Propellant Impulses, Impact Sensitivities and Synthesis of Nitrated ANTA and NTO Derivatives

Jensen T. L., Moxnes J. F., Kjønstad E. F., Unneberg E.

Central European Journal of Energetic Materials

2016

Vol. 13, no. 2

445--467

Nitrated derivatives of 5-amino-3-nitro-1,2,4-triazole (ANTA) and 3-nitro-1,2,4-triazol-5-one (NTO) were theoretically characterized with respect to their performance as high explosives and rocket propellants. The detonation velocity and the detonation pressure of the derivatives, calculated with EXPLO5 software, were at the same level or slightly above the performance of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX). The results showed that compositions of 1,3,4-trinitro-1,2,4-triazol-5-one and glycidyl azide polymer (GAP) could give specific impulses just above 2600 m/s in rocket propellants. The sensitivities of the derivatives were evaluated using their heats of detonation, CHNO-ratios, free space in the crystal lattice and N−NO2 bond dissociation energy. The stability and sensitivity of several of the derivatives could be poor due to the low N−NO2 bond dissociation energies. The N−NO2 bond dissociation energies in the derivatives were calculated to be between 41 and 296 kJ/mol when the M06-2X/6-311+G(2d,p) functional was used. Synthetic routes for the most stable derivatives were proposed. In addition, preliminary studies of the chloride-assisted nitrolysis of NTO were performed. The infrared spectrum of the NTO derivative indicated that N−NO2 bonds were formed.