The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Recently, a tremendous interest has been concentrated on the design and development of wireless sensor networks (WSNs) — distributed systems comprised of numerous wireless, sensor devices deployed densely in a sensing area. Battery powered sensors need efficient management due to limited energy resources, and energy conservation is a vital design issue that needs to be boosted in order to increase...
Wireless Sensor Networks present several advantages when compared to wired ones, among them, the low consumption and simplicity of installation. In some cases, energy consumption may be so low as to allow the use of energy harvesting techniques, as in the case of EnOcean protocol. In other networks, it is necessary to meet specific requirements, such as in industrial ones, where communication must...
Device-to-device communications aim to enhance service coverage, particularly at cell edges or in black spots within a neighborhood through relaying and forwarding. In this context, each device is free to move independently, and will therefore change its links to other devices frequently due to connectivity issues. During these movements, a device may be requested to forward traffic unrelated to its...
The prediction of adverse events in patient health has attracted researchers' attention for many years. Sensors in or on the body allow the continuous monitoring of patient's vital signs and their accurate analysis, supporting the generation of medical alerts. Exploring adverse event prediction only makes sense if medical alerts can be promptly transmitted to a hospital emergency response team. However,...
Full duplex (FD) cognitive radio (CR) is one of the key enabling technologies for future wireless communication systems. Improvement in the spectrum efficiency, as promised by the CR technology can be further extended to FD-CR networks (FDCRNs) by performing a highly efficient and methodical spectrum sensing. In this paper, energy detection based effective spectrum sensing in FDCRNs considering residual...
In this work, the principal aim is establishing networks parameters of wireless sensor. These devices can transmit variables to monitoring the quality of tourist beaches in the Colombian Caribbean. We propose a methodology to choose the network elements and its technologies. We analysis data based on coverage and implement the prototype. We show that the maximum distance between nodes is 33 m at mesh...
The Internet of Things (IoT) is becoming important in many areas that include health, entertainment, manufacturing, automotive, home and building automation, industrial, etc. Will it be important for education and more specifically for teaching and learning? If so, what engineering subjects would benefit the most and how effective could the IoT be for teaching and learning? Can IoT technologies and...
In the recent year's low power computing systems have gained popularity. Networks, which use low power computer systems and transmitted data by using wireless connection are called wireless sensor networks. Nowadays, the most topical researches pertaining to wireless sensor networks are grounded on the new optimization of structure of network transmission protocol, the routing optimization in transmission...
Smart sensing, devices, and monitoring are essential to localized motor condition monitoring and service applications. A unique approach to the smart device is the use of low-cost wireless sensors for machine condition measurement. Smartphones may be used as the computational platform that acquires motor parameters from wireless sensors using a compatible local communication. Considering the widespread...
In condition monitoring of electrical machines, wireless sensors enables access to internal signals that are relatively unexplored compared to the conventional external measurements. This paper demonstrates the application of wireless sensor to measure the rotor field winding current in a Brushless Synchronous Generator and compare the fault detection capability with the stator exciter field current...
The Standards Group of the IEEE Industrial Electronics Society (IES) has been active in standards for industrial electronics in recent years, focusing on sensors and sensors networks, real-time industrial communications and industrial agents in the automation fields. It has also participated and collaborated with other IEEE societies such as the Instrumentation and Measurement Society (IMS) in the...
This paper proposes two non-uniform quantization schemes and also introduces an implementation system based on Software Defined Radio (SDR) consisting of GNU Radio and Universal Software defined Radio Peripheral (USRP) to sense a spectrum. In cognitive radio (CR) systems, detection and error probability are representative indicators of system performance. These performance indicators are influenced...
Soil Moisture Sensing is important for many safety-critical, agricultural or even Smart Home applications to identify risks and take countermeasures at an early stage. By only punctually measuring the soil moisture, unfavorable events between the measurement points will possibly be undetected or recognized too late, because the detection radius is very limited. Therefore, this paper describes, how...
Camera-enabled sensors deployed for visual monitoring will cover a region of the target field, providing information for many innovative applications based on wireless sensing. Actually, some areas of the monitored field may have more relevance than others, according to the characteristics of the applications, which may indicate that such areas need better coverage to avoid blind spots and achieve...
Paper proposes a kind of multiple environmental parameters monitoring system for granary that is based on ZigBee network and takes ARM controller as core. With regard to hardware, monitoring circuits for temperature, humidity, CO2 concentration and grain water content are designed. With regard to control program, fuzzy intelligent algorithm is designed and transplanted to ARM controller. The test...
In recent years, the wireless body area network (WBAN) has become a heated topic in research, but its quality of service (QoS) has not received enough attention. The two operation modes of IEEE802.15.4 are analyzed, and the slotted CSMA/CA mechanism is found more suitable for the WBAN. With the simulation tool OPNET the network delays are proved to change in accordance with the parameter values of...
Energy harvesting has been gaining a lot of attention in the past decade due to its ability to provide a-virtually-endless energy supply. Nodes in a Wireless Powered Communication Network (WPCN) depend, totally or partially, on the energy harvested from the Central Node (CN) which has a constant power supply. This work addresses a solution to the problem of lack of fairness in the distribution of...
Automation of modern industrial plants require real-time tracking of object locations and sensing of local and ambient parameters for variety of applications such as counting and tracking of objects in assembly line, detection and positioning of failures of machines etc. Mostly, discrete Real Time Location System (RTLS) performs object tracking in existing industrial automation without its integration...
In this paper, different energy harvesting solutions for an autonomous miniature wireless sensing node are invista-gated. The communication part is realized with Low Power Wide Area Network (LP-WAN) LoRa technology that combine low-power and long range capabilities. Solar, Thermal and Piezo harvesting techniques are compared for autonomous sensing application.
Cognitive radio (CR) is an intelligent system for designing modern wireless communication systems. Spectrum sensing is one of the most important issues in CR. This paper presents a semi blind spectrum sensing method which exploits the combination of comb filter and autocorrelator. The proposed method improves the detection performance of blind spectrum sensing in severe noise environments where an...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.