Possibilities and ways of design, implementation and application of microcomputer based embedded SCADA and RFID systems implemented on LINUX platform are considered, proposed and described in the paper. It is proposed...
详细信息
Possibilities and ways of design, implementation and application of microcomputer based embedded SCADA and RFID systems implemented on LINUX platform are considered, proposed and described in the paper. It is proposed to use open source hardware and software microcomputer technologies for design and implementation of the systems. Major possibilities and advantages of implementation and application of such systems are described. One such practically designed and implemented system that performs data acquisition and appropriate control is presented and described. Technologies used to realize the system, as well as embedded application of such solution are described. The system hardware was implemented using opensource microcomputer boards, RFID and other sensors, WiFi router and additional electronics. The system software was implemented using opensource tools and programs and LINUX operating system. The system was realized using modular approach. It enables easy system expandability, simplifying maintenance and adapting of the system to user requirements and needs. Access to system monitoring and control is possible using web based user interface and command line interface. It is achieved balance between functionality and cost of the system. Main advantages of the system compared with standard SCADA and RFID systems are low cost of the system, optimization according to user requirements and needs and low consumption of electrical energy. It is specialized and optimized system for specific requirements and needs. (C) 2018 Published by Elsevier B.V.
One oft-cited strategy towards sustainability is improving energy efficiency inside public buildings. In this context, the educational buildings sector presents a very interesting and important case for the monitoring...
详细信息
One oft-cited strategy towards sustainability is improving energy efficiency inside public buildings. In this context, the educational buildings sector presents a very interesting and important case for the monitoring and management of buildings, since it addresses both energy and educational issues. In this work, we present and discuss the hardware IoT infrastructure substrate that provides real-time monitoring in multiple school buildings. We believe that such a system needs to follow an open design approach: rely on hardware-agnostic components that communicate over well-defined open interfaces. We present in detail the design of our hardware components, while also providing insights to the overall system design and a first set of results on their operation. The presented hardware components are utilized as the core hardware devices for GAIA, an EU research project aimed at the educational community. As our system has been deployed and tested in several public school buildings in Greece, we also report on its validation. (C) 2017 Published by Elsevier Ltd.
In this paper we are going to illustrate and discuss the CNR-IRPI-GMG-T1, a fixed-wing UAV designed and assembled by the GMG of the CNR - IRPI and based on a full opensource platform. Thanks to its payload modularity...
详细信息
ISBN:
(纸本)9781728113449
In this paper we are going to illustrate and discuss the CNR-IRPI-GMG-T1, a fixed-wing UAV designed and assembled by the GMG of the CNR - IRPI and based on a full opensource platform. Thanks to its payload modularity (i.e.: optical or multispectral cameras, GNSS RTK positioning, action camera, etc.), the aircraft has been used in a large number of sites for geohazards monitoring and surveying. This low-cost solution has been recently upgraded with an opensource technology both for First Person View (FPV) in full HD and to obtain telemetry over a 3G / 4G network. This system has been developed in order to fly Beyond the Visual Line of Sight (BVLOS) and to further extend the UAV range of application.
The need for fabricating a prototype circuit arises frequently in electronics, including education and research laboratories. In resource-poor countries in the developing world, this is hindered by the high cost of co...
详细信息
The need for fabricating a prototype circuit arises frequently in electronics, including education and research laboratories. In resource-poor countries in the developing world, this is hindered by the high cost of commercial Printed Circuit Board (PCB) prototyping machines and long turn-around commercial fabrication process. Practical, hands-on laboratory teaching and experimentation is necessary to improve learning in electronics. In this paper, a low-cost build-your-own (BYO) semi-automated three-axis PCB milling machine for double-sided PCB prototyping is developed using commercial components and opensourcehardware and free opensourcesoftware, to provide students, teachers, and engineers an accessible and affordable resource for PCB prototyping. Also, the main problems encountered during fabrication of PCB have been mentioned and the techniques used to solve them are discussed in detail. (c) 2018 Elsevier Ltd. All rights reserved.
In this work, we have designed, constructed, and evaluated simple, inexpensive open-source data acquisition systems based on various analog-to-digital converter modules (ADS 1115, MCP 3424, LTC 2400, with resolution f...
详细信息
In this work, we have designed, constructed, and evaluated simple, inexpensive open-source data acquisition systems based on various analog-to-digital converter modules (ADS 1115, MCP 3424, LTC 2400, with resolution from 16 to 24-bit) and a miniature Arduino Nano TM microcontroller. The con-structed data acquisition systems provide excellent performance and are comparable to a commercial, 24-bit device. We provide full schematics and corresponding source codes so that analytical chemists can easily construct any of the developed systems without extensive electronic or programming knowledge. The 24-bit LTC 2400 based device provided the best and comparable performance to a commercial, high -end 24-bit sigma to delta converter (ORCA 2800) at a fraction of cost (less than 50 USD compared to 870 USD for the commercial counterpart). The excellent performance was verified using a capillary elec-trophoresis system with contactless conductivity detection and separation of inorganic ions in clinical skin wipe and tap water samples. (c) 2021 Elsevier B.V. All rights reserved.
Background: In-house built capillary electrophoresis (CE) systems represent a significant share of laboratory instrumentation. In most of these instruments, sample injection is effected manually with low to moderate p...
详细信息
Background: In-house built capillary electrophoresis (CE) systems represent a significant share of laboratory instrumentation. In most of these instruments, sample injection is effected manually with low to moderate precision and requires skilled operators. Although few automated samplers have been previously developed, typically only one sample at a time can be injected. If a series of samples is to be analyzed, manual intervention is required. In the present work, we developed and constructed a fully automated, opensource, CE autosampler, able to handle up to 14 different samples that can be used as a modular component of any in-house built CE instrument. Results: An inexpensive, 3D printed, opensource, autosampler for CE was developed. The autosampler consists of two parts: an injection unit with carousel containing sample and electrolyte vials and a flushing unit, containing a miniature pressure/vacuum pump. The autosampler is operated by an Arduino Mega microcontroller and an Arduino code written in the laboratory. The injection sequence is entered through a keypad and LCD display by the user. The instrument can operate autonomously for extended periods of time. It was used for fully automated analysis and/or calibration of up to 14 samples with excellent injection repeatability reaching less than 2.7% RSD for peak areas. The sampler performance was tested with two independently built CE instruments, a CE system with contactless conductivity detection (C4D) and a CE system with laser induced fluorescence (LIF) *** and novelty: A novel, 3D printed, Arduino-based autosampler for CE was developed. The autosampler allows autonomous hydrodynamic injection of up to 14 different samples with fully programmable injection sequence, including capillary flushing and high voltage and data acquisition control. It provides the missing instrumental sampling setup for laboratory made CE instruments. It can be simply constructed based on the open -source blu
Efforts to understand and mediate threats to water supplies rely on collection of reliable data at large scale, a goal which is often limited by availability of tools that are both afford-able and reliable. We present...
详细信息
Efforts to understand and mediate threats to water supplies rely on collection of reliable data at large scale, a goal which is often limited by availability of tools that are both afford-able and reliable. We present here a low-cost, easy-to-use, do-it-yourself (DIY) spectrom-eter for measurement of a variety of relevant solute concentrations when coupled with inexpensive commercially-available reagents. Comparison of its performance with com-mercial options demonstrates the potential value of this device as transparent, versatile, and accurate-enough alternative for widespread application. Published by Elsevier Ltd.
暂无评论