Detecting Hot Spots in Photovoltaic Panels Using Low-Cost Thermal Cameras

2020 ◽  
pp. 38-53 ◽  
Author(s):  
Miguel Dávila-Sacoto ◽  
Luis Hernández-Callejo ◽  
Víctor Alonso-Gómez ◽  
Sara Gallardo-Saavedra ◽  
Luis G. González
Keyword(s):  
Hot Spots ◽  
Low Cost ◽  
Photovoltaic Panels ◽  
Thermal Cameras

scholarly journals Monitoring of Khorasan (Triticum turgidum ssp. turanicum) and Modern Kabot Spring Wheat (Triticum aestivum) Varieties by UAV and Sensor Technologies under Different Soil Tillage

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1348
Author(s):  
Kristýna Balážová ◽  
Jan Chyba ◽  
Jitka Kumhálová ◽  
Jiří Mašek ◽  
Stanislav Petrásek
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Triticum Turgidum ◽  
Soil Analysis ◽  
Low Cost ◽  
Wheat Variety ◽  
Soil Surface ◽  
Conventional Tillage ◽  
Soil Tillage ◽  
Thermal Cameras

Khorasan wheat (Triticum turgidum ssp. turanicum (Jakubz.)) is an ancient tetraploid spring wheat variety originating from northeast parts of Central Asia. This variety can serve as a full-fledged alternative to modern wheat but has a lower yield than modern varieties. It is commonly known that wheat growth is influenced by soil tillage technology (among other things). However, it is not known how soil tillage technology affects ancient varieties. Therefore, the main objective of this study was to evaluate the influence of different soil tillage technologies on the growth of the ancient Khorasan wheat variety in comparison to the modern Kabot spring wheat (Triticum aestivum) variety. The trial was arranged in six small plots, one half of which was sown by the Khorasan wheat variety and the other half of which was sown by the Kabot wheat variety. Three soil tillage methods were used for each cultivar: conventional tillage (CT) (20–25 cm), minimum tillage (MTC) with a coulter cultivator (15 cm), and minimization tillage (MTD) with a disc cultivator (12 cm). The soil surface of all of the variants were leveled after tillage (harrows & levelling bars). An unmanned aerial vehicle with multispectral and thermal cameras was used to monitor growth during the vegetation season. The flight missions were supplemented by measurements using the GreenSeeker hand-held sensor and plant and soil analysis. The results showed that the Khorasan ancient wheat was better suited the conditions of conventional tillage, with low values of bulk density and highvalues of total soil porosity, which generally increased the nutritional value of the yield in this experimental plot. At the same time, it was found that this ancient wheat does not deplete the soil. The results also showed that the trend of developmental growing curves derived from different sensors was very similar regardless of measurement method. The sensors used in this study can be good indicators of micronutrient content in the plant as well as in the grains. A low-cost RGB camera can provide relevant results, especially in cases where equipment that is more accurate is not available.

scholarly journals Performance Assessment of Low-Cost Thermal Cameras for Medical Applications

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1321 ◽  
Author(s):  
Enrique Villa ◽  
Natalia Arteaga-Marrero ◽  
Juan Ruiz-Alzola
Keyword(s):  
Low Cost ◽  
Home Monitoring ◽  
Medical Applications ◽  
Competitive Advantages ◽  
Monitoring Applications ◽  
Thermal Cameras ◽  
Recent Developments ◽  
Controlled Environments ◽  
Noise Equivalent Temperature Difference

Thermal imaging is a promising technology in the medical field. Recent developments in low-cost infrared (IR) sensors, compatible with smartphones, provide competitive advantages for home-monitoring applications. However, these sensors present reduced capabilities compared to more expensive high-end devices. In this work, the characterization of thermal cameras is described and carried out. This characterization includes non-uniformity (NU) effects and correction as well as the thermal cameras’ dependence on room temperature, noise-equivalent temperature difference (NETD), and response curve stability with temperature. Results show that low-cost thermal cameras offer good performance, especially when used in temperature-controlled environments, providing evidence of the suitability of such sensors for medical applications, particularly in the assessment of diabetic foot ulcers on which we focused this study.

scholarly journals Light-Free Cross-Talk Analysis of a CMOS Infrared Detector Array

Proceedings ◽  
2020 ◽  
Vol 56 (1) ◽  
pp. 10
Author(s):  
Ying Dai ◽  
Syed Zeeshan Ali ◽  
Richard Hopper ◽  
Claudio Falco ◽  
Daniel Popa ◽  
...  
Keyword(s):  
Cross Talk ◽  
Low Cost ◽  
Infrared Detector ◽  
Complementary Metal Oxide Semiconductor ◽  
High Volume ◽  
Oxide Semiconductor ◽  
Simple Method ◽  
Monolithically Integrated ◽  
Thermal Cameras ◽  
Thermal Imagers

Low-cost infrared (IR) thermal cameras are powering a rising market of industrial and consumer applications. Complementary metal-oxide-semiconductor (CMOS)-based thermopile arrays are proven thermal imagers that can be monolithically integrated into low-cost and low-power-consumption formats for high-volume manufacturability. Here we present a simple method to evaluate the cross-talk of these arrays and propose a numerical model for device optimization.

A Low Cost Automated Cleaning System for Photovoltaic Panels

2018 ◽  
Author(s):  
Jamal Haydar ◽  
Ahmad NourAldeen ◽  
Hadi Fayad ◽  
Walid Fahs ◽  
Hussein Al Haj Hassan
Keyword(s):  
Low Cost ◽  
Photovoltaic Panels ◽  
Cleaning System

scholarly journals FIRST ASSESSMENTS ON HERITAGE SCIENCE ORIENTED IMAGE-BASED MODELING USING LOW-COST MODIFIED AND MOBILE CAMERAS

2019 ◽  
Vol XLII-2/W17 ◽  
pp. 23-30 ◽  
Author(s):  
E. Adamopoulos ◽  
F. Rinaudo ◽  
A. Bovero
Keyword(s):  
Large Scale ◽  
Low Cost ◽  
Three Dimensional ◽  
Metric Properties ◽  
Scientific Investigations ◽  
Three Dimensional Modeling ◽  
Heritage Science ◽  
Thermal Cameras ◽  
Recent Developments ◽  
Good Quality Image

Abstract. Three-dimensional modeling of cultural heritage, especially concerning large scale studies, as for example, archaeometry, diagnostics and conservation intervention applications, which usually require high-resolution and multi-spectral analyses, necessitates the use of complicate and often expensive equipment. Recent developments regarding low-cost commercially available spectrally modified digital reflex cameras, smartphones with good quality image sensors, mobile thermal cameras in combination with automated or semi-automated photogrammetric software implementing Structure from Motion (SfM) and Multiview Stereo (MVS) algorithms constitute some cheaper and simpler alternatives. Although, the results of the integration of these types of sensors and techniques are often not evaluated as metric products. The presented research combines the above-mentioned instrumentation and software to implement and evaluate low-cost 3D modeling solutions on heritage science-oriented case studies, but also to perform some first assessments on the resulting models' metric properties, quality of texture and usefulness for further scientific investigations.

Fabrication of SERS Active Substrates by Nanoimprint Lithography

2007 ◽  
Vol 1054 ◽  
Author(s):  
Kebin Li ◽  
Bo Cui ◽  
Liviu Clime ◽  
Teodor Veres
Keyword(s):  
Numerical Simulations ◽  
Hot Spots ◽  
Nanoimprint Lithography ◽  
Rhodamine 6G ◽  
Low Cost ◽  
Dipole Approximation ◽  
Sers Substrates ◽  
The Given ◽  
Method Show ◽  
Dda Method

ABSTRACTA method for low-cost fabrication of SERS substrates in rapid and reproducible way based on nanoimprint lithography (NIL) method has been developed. The SERS enhancement for detection of Rhodamine 6G molecules is demonstrated on two model nanostructures comprising either Au nano-crescents or Ag nano-wells fabricated by this method. Numerical simulations based on discrete dipole approximation (DDA) method show that the observed enhancement of the SERS signal for the given geometries originates in hot-spots localized at the tips of the nanocrescent. For the nanowell, the hotspots are mainly localized inside the cavity, on the side of the nanodonut, or at the edge of the bottom nanodisc when it is excited by a laser at the wavelength of 785 nm.

scholarly journals In Situ Tests of the Monitoring and Diagnostic System for Individual Photovoltaic Panels

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1770
Author(s):  
Mariusz Woszczyński ◽  
Joanna Rogala-Rojek ◽  
Sławomir Bartoszek ◽  
Marian Gaiceanu ◽  
Krzysztof Filipowicz ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Diagnostic System ◽  
Operating Conditions ◽  
Photovoltaic System ◽  
Operational Parameters ◽  
In Situ Tests ◽  
Photovoltaic Panel ◽  
Photovoltaic Panels

The dynamic development of photovoltaic systems in the world and in Poland is mainly related to the drop in prices of installation components. Currently, electricity from photovoltaics is one of the cheapest renewable energy sources. The basis for effective energy generation is, first of all, failure-free operation of the photovoltaic system over a long period of operation, up to 30 years. The paper presents the results of a study of a low-cost distributed system for monitoring and diagnosis of photovoltaic installations (SmartPV), capable of assessing the operating parameters of individual photovoltaic panels. The devices were tested by connecting them to an existing photovoltaic installation, allowing the measurement of operational parameters of individual photovoltaic panels as well as operating conditions such as illuminance and panel surface temperature. The data were recorded on a server using wireless Wi-Fi transmission. Interesting data were collected during the tests, confirming the usefulness of the suggested device for monitoring the photovoltaic installations. Differences in performance of the photovoltaic panel depending on solar radiation and surface temperature were recorded. The temperature coefficient of power was determined, allowing for increased accuracy in the prediction of generated power. The correct recording in different situation, i.e., shading, sensor damage or weather anomalies, was verified. Based on the collected data, rules will be defined for an expert application which, in combination with SmartPV devices, will ensure a quick response to any malfunctions of the photovoltaic system, both related to failures and those resulting from natural degradation during operation.

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