The impact of air quality on health and life comfort is well established. In many societies, vulnerable elderly young populations spend most their time indoors. Therefore, indoor monitoring (IAQM) great importance to human health. Engineers researchers are increasingly focusing efforts the design real-time IAQM systems using wireless sensor networks. This paper presents an end-to-end system enabling measurement CO2, CO, SO2, NO2, O3, Cl2, ambient temperature, relative humidity. systems,...

In order to help maintain comfortable living conditions within a home, home monitoring and automation are utilized. The standards of human's comfort in homes can be categorized into several types. Among these categories, the most significant ones thermal comfort, which is related temperature humidity, followed by visual colors light, hygienic associated with air quality. A system set monitor parameters them an acceptable range. Additionally, making house smart allow for intelligent automatic...

Gas turbines are faced with new challenges of increasing flexibility in their operation while reducing life cycle costs, leading to research priorities and challenges. One these involves the establishment high fidelity, accurate, computationally efficient engine performance simulation, diagnosis, prognosis schemes, which will be able handle address gas turbine's ever-growing flexible dynamic operational characteristics. Predicting accurately depends on detailed understanding components...

Copper nanowires (CuNWs) with ultrahigh aspect ratio are synthesized a solution process and spray-coated onto select substrates to fabricate transparent conductive electrodes (TCEs). Different annealing methods investigated compared for effectiveness convenience. The CuNWs subsequently combined the polymer poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) or reduced graphene oxide (rGO) platelets in order reduce surface roughness improve durability of fabricated TCEs. Our...

Increasing the number of sensors in a gas identification system generally improves its performance as this will add extra features for analysis. However, affects computational complexity, especially if algorithm is to be implemented on hardware platform. Therefore, feature reduction required extract most important information from processing. In paper, linear discriminant analysis (LDA) and principal component (PCA)-based algorithms have been analyzed using data obtained two different types...

A resolver generates a pair of signals proportional to the sine and cosine angular position its shaft. new low-cost method for converting amplitudes these sine/cosine transducer into measure input angle without using lookup tables is proposed. The takes advantage components used operate resolver, excitation (carrier) signal in particular. This feedforward based on comparing those together with another shifted by pi/2. simple then estimate shaft through this comparison technique. poor...

A newly developed resolver converter, providing a pseudolinear voltage proportional to the shaft angle, is presented. This converter based on new concept involving absolute values of demodulated sine and cosine signals together with dedicated linearization technique. The enables instantaneous determination mechanical angle theoretical error nonlinearity below 0.011/spl deg/ over 360/spl range. practical performance this compared that 10/sup 5/ pulses per revolution optical encoder...

A novel and simple resolver-to-dc converter is presented. It shown that by appropriate processing of the sine cosine resolver signals, proposed may produce an output voltage proportional to shaft angle. dedicated compensation method applied almost perfectly linear output. This enables determination angle with reasonable accuracy without a processor and/or look-up table. The tests carried out under various operating conditions are satisfactory in good agreement theory. paper gives theoretical...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> A new low cost converter topology is proposed for sinusoidal position encoders. The enables determination of the angle from sine and cosine signals encoder. When used with resolvers, implementation present scheme takes advantage available excitation signal to operate device. This trigonometric reference optimally generate an analogue equivalent a digital look-up table (LUT). mechanical without...

This paper describes a novel and high-performance phase-locked loop (PLL) resolver converter for the measurement of mechanical angles. The proposed method does not require use demodulators, voltage-controlled oscillator, digital-to-analog converter, counter, lookup tables, that are associated with conventional PLL converters. employs full-wave rectifiers to obtain absolute values modulated signals. scheme results in triangular output voltage two binary outputs represent measure input angle....

In fossil fuel applications, such as air transportation and power generation systems, gas turbine is the prime mover which governs aircraft’s propulsive plant’s thermal efficiency, respectively. Therefore, an accurate engine performance simulation has a significant impact on operation maintenance of turbines far reliability availability considerations are concerned. Current trends in achieving stable operation, reliable fault diagnosis prognosis requirements do motivate development...

This paper describes a phase-locked loop (PLL) converter with improved dynamic response for the determination of mechanical angle from sinusoidal encoders and resolvers. PLL converters are tracking-type that use sine cosine signals transducer in closed-loop arrangement aiming to match an estimated output true encoded input signals. Such scheme requires means determine angle; conventional achieve this by using voltage-controlled oscillators, digital-to-analog (DAC), counter, lookup tables....

Sinusoidal encoders are used for the measurement of angular position and linear displacement. These provide electrical signals dependent on sine cosine θ their moving part relative to stationary one. Conventional tangent/cotangent converters determining from encoder produce alternating highly non-linear segments tangent cotangent. Lookup tables θ. This paper presents a novel converter estimating without lookup table. The method is based dividing circle interval into N sections. A crude or...

Abstract This paper presents the design of a modular and open‐source smart meter for educational research purposes. The monitors energy consumption, uploads data to cloud server, can be used control appliances remotely through relay. Using Internet Things (IoT) technology, acts as sensing node in meshed network. enables consumers visualize their consumption profiles at level take actions manage efficient using automation platforms or IoT with meters. In this paper, consumed by different...

Abstract Resolvers and various other types of sine/cosine encoders are used for both angular linear position sensing. These devices provide analogue signals in the form sine cosine an angle θ related to moving part transducer. A novel converter is described linearization sensor signals. The scheme converts co-sinusoids into a nearly perfect triangular signal from which determined using simple equation. proposed makes use alternating pseudo-linear segments signals, together with dedicated...

Improving efficiency, reliability and availability of gas turbines have become more than ever one the main areas interest in turbine research. This is mainly due to stringent environmental regulations that be met such a mature technology sector; consequently new research challenges been identified. One these involves establishment high fidelity, accurate, computationally efficient engine performance simulation, diagnosis prognosis technology. Performance prediction strongly dependent on...