A hardware approach of a low-power IoT communication interface by NXP FlexIO module

This article describes implementation possibilities of specialized microcontroller peripherals, as hardware solution for Internet of Things (IoT) low-power communication, interfaces. In this contribution, authors use the NXP FlexIO periphery. Meanwhile, RFC1662 is used as a reference communication standard. Implementation of RFC1662 is performed by software and hardware approaches. The total power consumption is measured during experiments. In the result section, authors evaluate a time-consumption trade-off between the software approach running in Central Processing Unit (CPU) and hardware implementation using NXP FlexIO periphery. The results confirm that the hardware-based approach is effective in terms of power consumption. This method is applicable in IoT embedded devices.Web of Science256393

Analysis of LoRaWAN transactions for TEG-powered environment-monitoring devices

Long-Range (LoRa) transmission technology is potentially a suitable solution in abundant applications such as smart cities, smart industries, smart health, and others, although it is challenging and complex to implement. LoRa is a non-cellular modulation technology for Long-Range Wide-Area Networks (LoRaWAN) and is suitable for Internet of Things (IoT) solutions through its long-range and low-power consumption characteristics. The present paper provides a comprehensive analysis of LoRa wireless transactions through several measurements, which differ in LoRa parameter configuration. The results showed dependency of the power consumed by the transaction on the selected Effective Isotropic Radiated Power (EIRP). The quantity of energy consumed by the transaction also significantly depends on the selected data rate (combination of the spread factor and bandwidth) and payload.Web of Science283363

An optical-based sensor for automotive exhaust gas temperature measurement

The article introduces the design of an optical-based sensor that measures automotive exhaust gas temperatures (EGTs) over a wide temperature range. To measure temperature, we combined the luminescence method and the blackbody radiation (BBR) principle. We also developed our own measurement hardware that includes the means to process and evaluate the signals obtained for temperature conversion using optical methods for application in the target temperature range (-40 degrees C to 820 degrees C). This temperature range is specified by the automotive industry according to current combustion engine designs and emission requirements, which stipulate accurate measurement of operating temperature for optimal functioning. Current measurement solutions are based on the thermocouple principle. This approach is problematic, especially with regard to electromagnetic interference and self-diagnostics, and problems also exist with the gradual penetration of moisture into the temperature probe under extreme thermal stress. The case study confirmed the full functionality of the new optical sensor concept. The benefit of the proposed concept is full compatibility with existing conceptual solutions while maintaining the advantages of optical-based sensors. The results indicated that a combination of the BBR and luminescence methods with a ruby crystal in the proposed solution produced an average absolute error of 2.32 degrees C in the temperature range -40 degrees C to 820 degrees C over a measurement cycle time of 0.25 s.Web of Science71art. no. 700571

Environment-monitoring IoT devices powered by a TEG which converts thermal flux between air and near-surface soil into electrical energy

Energy harvesting has an essential role in the development of reliable devices for environmental wireless sensor networks (EWSN) in the Internet of Things (IoT), without considering the need to replace discharged batteries. Thermoelectric energy is a renewable energy source that can be exploited in order to efficiently charge a battery. The paper presents a simulation of an environment monitoring device powered by a thermoelectric generator (TEG) that harvests energy from the temperature difference between air and soil. The simulation represents a mathematical description of an EWSN, which consists of a sensor model powered by a DC/DC boost converter via a TEG and a load, which simulates data transmission, a control algorithm and data collection. The results section provides a detailed description of the harvested energy parameters and properties and their possibilities for use. The harvested energy allows supplying the load with an average power of 129.04 mu W and maximum power of 752.27 mu W. The first part of the results section examines the process of temperature differences and the daily amount of harvested energy. The second part of the results section provides a comprehensive analysis of various settings for the EWSN device's operational period and sleep consumption. The study investigates the device's number of operational cycles, quantity of energy used, discharge time, failures and overheads.Web of Science2123art. no. 809

Optimization of the video stream

Tato práce popisuje metody řízení a optimalizace datového toku digitálního videosignálu ve vestavěných systémech typu ADAS. Je popsán současný stav techniky a je provedena rešerše architektur dostupných řešení. Dále je navržena architektura systému optimalizovaného pro bezdrátový přenos s proměnlivou přenosovou rychlostí. Navržená architektura ke své implementaci vyžaduje použití specifických synchronizačních a řídicích algoritmů. Tyto algoritmy jsou implementovány s použitím konečných stavových automatů a expertního systému. Je provedena optimalizace diferenciální evolucí. Navržené algoritmy jsou implementovány na experimentální realizaci zařízení a je provedeno vyhodnocení chování těchto algoritmů s použitím simulací.This work describes methods for control and optimization of a digital video data stream in ADAS embedded systems. Common system architectures are described as well as technical solutions used for their implementation. Architecture of the wireless system optimized for a low bandwidth communication channel is proposed. Devised architecture requires usage of a specific synchronisation and control algorithms. These algorithms are based on a finite state automaton and expert system. Optimization using differential evolution is performed. Suggested algorithms are implemented with an experimental hardware and their behavior is verified with simulations.450 - Katedra kybernetiky a biomedicínského inženýrstvívyhově

System Management Mode procesorů Intel IA-32

Import 09/01/2007Prezenční456 - Katedra informatik

Systém Sledování Vitálních Funkcí

Cílem této práce je seznámit čtenáře s možnostmi návrhu distribuovaného biotelemetrického systému a s technologiemi použitelnými při jeho implementaci. Je stručně popsána problematika sběru biometrických dat, navržen protokol pro předávání biometrických dat a nastíněna možnost implementace.The goal of this work is to familiarize readers with possibilities of distributed biotelemetric system design and technologies applicable in implementation of such system. This work describes fundamentals of biometric data collection, proposes communication protocol for biometric data passing and drafts implemenatation possibilitiesPrezenční456 - Katedra informatikyvýborn

Advanced experimental medical diagnostic system design and realization

The aim of this work is to design and realize the experimental diagnostic instrument for biological data measurement. In the biomedical engineering daily live work is necessary to measure and analyze wide range of variables coming primary from humans or animals. There are measured mostly electrical signals from in vivo or in vitro from the subjects. Concerning these requirements we proposed the cheap and quality balanced measuring device for six channels with 2 kHz and 12 bit ADC resolution equipped with USB bus. Concerning our requirements were realized the photoplethysmography and electrocardiography module connected into measuring device to realize practical bio-signal measurements and tests. Ill. 12, bibl. 5 (in English; abstracts in English and Lithuanian).Web of Science1171948

Glucose measuring device with advanced data processing and improved strip detection

People suffering from diabetes mellitus are dependent on exact blood glucose concentration information. This information is vital for their successful treatment and protection against life threatening extremely low or high blood sugar levels. Solution described in this paper integrates blood glucose evaluation and treatment recommendation, where all the information like body sensitivity to insulin and carbohydrate to insulin ratio is used to calculate recommended amount of next insulin dosage or food. This solution also supports strip with damaged insertion signal line. Device prototype had been developed and successfully tested on three subjects with diabetes I and two with diabetes II.Web of Science191434