Flexible and low-cost FPGA-based multichannel analyzer for handheld measurement devices

2021 ◽  
Vol 1018 ◽  
pp. 165808
Author(s):  
Van Hiep Cao ◽  
Tien Hung Dinh ◽  
Thi Thoa Nguyen ◽  
Khanh Hung Nguyen ◽  
Dinh Khang Pham ◽  
...  
Keyword(s):  
Low Cost ◽  
Multichannel Analyzer ◽  
Measurement Devices

scholarly journals Lifetime of electrochromic optical transition cycling of ethyl viologen diperchlorate-based electrochromic devices

2021 ◽  
Vol 3 (5) ◽  
Author(s):  
Logan G. Kiefer ◽  
Christian J. Robert ◽  
Taylor D. Sparks
Keyword(s):  
Optical Transition ◽  
Low Cost ◽  
Cycling Performance ◽  
Power Measurement ◽  
Electrochromic Devices ◽  
Metal Oxide Films ◽  
Cycle Times ◽  
Vis Spectroscopy ◽  
Multiple Devices ◽  
Measurement Devices

AbstractElectrochromic materials and devices are enabling a variety of advanced technologies. Gel-based organic electrochromic molecules such as ethyl viologen diperchlorate are attractive options due to their simple device design and low cost processing options relative to the more expensive and complex transition metal oxide films. However, electrochromic devices are subject to extensive cycling in which failure and fatigue can eventually occur. This work presents the lifetime cycling performance of ethyl viologen diperchlorate-based electrochromic devices using two different anodic compounds, hydroquinone and ferrocene, which are cycled at different voltages, 3 V and 1.2 V, respectively. Multiple devices are cycled until failure with periodic device characterization via UV–Vis spectroscopy, electrical resistance and power measurement, and transition duration measurement. Devices with hydroquinone can transition quickly. Cycle times are $$\sim$$ ∼ 30 s in these samples, however, these samples also typically fail before 3000 cycles. On the other hand, devices using ferrocene transition more slowly (total cycle time $$\sim$$ ∼ 2 min), but have superior cycling performance with all samples surviving beyond 10,000 cycles while complying with ASTM E2141-14 standard.

scholarly journals Teaching and Learning Physics with Smartphones

2015 ◽  
Vol 17 (1) ◽  
pp. 31-50 ◽  
Author(s):  
M. Á. González ◽  
Manuel Á. González ◽  
M. Esther Martín ◽  
César Llamas ◽  
Óscar Martínez ◽  
...  
Keyword(s):  
Mobile Applications ◽  
Teaching And Learning ◽  
Low Cost ◽  
Positive Influence ◽  
Mobile Technologies ◽  
Traditional Learning ◽  
Know How ◽  
Measurement Devices ◽  
The One ◽  
Physics Experiments

The use of mobile technologies is reshaping how to teach and learn. In this paper the authors describe their research on the use of these technologies to teach physics. On the one hand they develop mobile applications to complement the traditional learning and to help students learn anytime and anywhere. The use of this applications has proved to have very positive influence on the students' engagement. On the other hand, they use smartphones as measurement devices in physics experiments. This opens the possibility of designing and developing low cost laboratories where expensive material can be substituted by smartphones. The smartphones' sensors are reliable and accurate enough to permit good measurements. However, as it is shown with some examples, special care must be taken here if one does not know how these apps used to access the sensors' data are programmed.

A Low Cost Velocity Measurement System Design for Rotary Machinery

2010 ◽  
Author(s):  
Cagatay Cakir ◽  
Hasan Koruk ◽  
Burak Ulas
Keyword(s):  
System Design ◽  
Measurement System ◽  
Velocity Measurement ◽  
Practical Problem ◽  
Low Cost ◽  
Measurement Systems ◽  
Rotary Machinery ◽  
Measurement Devices ◽  
Motorized Vehicles ◽  
Sufficient Precision

Today, as the importance of system automation increases, measurement systems become more and more important. Consequently, in many applications, from washing machines, motorized vehicles, robots to nuclear turbine reactors, velocity measurement is inevitable. In industry, velocity is widespreadly needed to be measured. Besides that researchers through the globe need such measurement devices in their studies. On the other hand, to be able to make a correct measurement, it may be needed to pay much on measuring equipments while the economical issue is sometimes the reason for the research does not continue on or even not begin. So, it has always been a practical problem for both industry and researchers not to be able to measure the rotating velocity of machinery with both sufficient precision and low cost. In this paper, a very low cost but still precise velocity measurement system design is introduced, explained and discussed. First, building up of the sensor circuit and basic components of the system are introduced. Then, data acquisition and signal processing of the system are explained. Finally, advantages of the system are discussed and some conclusions are given.

Design of a Portable Bioelectrical Impedance Measurement System

2011 ◽  
Vol 365 ◽  
pp. 409-414
Author(s):  
Yi Lu ◽  
Cheng Yu Huo ◽  
Ai Jun He
Keyword(s):  
Biomedical Research ◽  
Measurement System ◽  
Low Cost ◽  
Impedance Measurement ◽  
Bioelectrical Impedance ◽  
Usb Bus ◽  
Measurement Devices ◽  
Digital Demodulation ◽  
Electrode Technique ◽  
Impedance Converter

Bioelectrical impedance measurement is a widely used biomedical detecting technology. However, most traditional bioelectrical impedance measurement devices are bulky, expensive and lack of flexibility. In order to reduce costs, increase flexibility and maintain similar performance, a portable bioelectrical impedance measurement system was designed in this paper. The measurement front, with an ARM based microcontroller and integrated impedance converter chip as its core device, communicated with the host computer via USB bus. Based on the four-electrode technique, DFT digital demodulation and software calibration and compensation algorithm, the system realized its functions. Experimental results indicate that the system can achieve high precision bioelectrical impedance measurement. With the advantage of high integration and low-cost, the system can be widely used in household healthcare, clinics and biomedical research and testing.

Data acquisition system for induction motors with arduino

2019 ◽  
pp. 256-262
Author(s):  
Ali Sinan Cabuk
Keyword(s):  
Data Acquisition ◽  
Induction Motor ◽  
Induction Motors ◽  
Low Cost ◽  
Data Acquisition System ◽  
Electrical Machines ◽  
Acquisition System ◽  
Efficiency Measure ◽  
Collection System ◽  
Measurement Devices

Data acquisition systems have been used for many years in order to conduct analyses to increase efficiency, measure performance and detect failures in electrical motors.High costs and not being of modular use have prevented these systems from being commonly used. Various methods were developed for data acquisition from electrical machines. This paper presents data acquisition analysing and monitoring system using Arduino platform. Vibration, temperature and current values of a 3 phase induction motor are obtained by this data acquisition system via USB port. A system compatiable with all sorts of settings and of low cost was obtained as a result of using Arduino where data processing is conducted on a computer. Values obtained from the data collection system used in this study were found to be supportive to the values shown by the measurement devices from 3 phase induction motor.

scholarly journals Spot-Centroid Determination Algorithms in Semiactive Laser Photodiodes for Artillery Applications

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Raul de Celis ◽  
Luis Cadarso
Keyword(s):  
Mathematical Model ◽  
Relative Position ◽  
Low Cost ◽  
The Other ◽  
Interpolation Algorithm ◽  
Needed Information ◽  
Measurement Devices ◽  
Processing Algorithms ◽  
Terminal Guidance ◽  
Quadrant Photodetector

Precision of guided projectiles depends equally on the accuracy in determining the coordinates of the objective and on the exactness of the measurement devices utilized for position and attitude calculation of the projectile. Development of algorithms for low-cost high-precision terminal guidance systems is a cornerstone in research in this field. Semiactive laser (SAL) kits, and particularly quadrant detector devices, have been developed to improve precision in guided weapons. Photodetection system can be functionally divided into two main parts: sensing and processing. The sensed signal is processed to estimate the spot coordinates, i.e., the laser footprint, which provides some information regarding projectile-target relative position, to obtain the needed information for the navigation and guidance algorithms. The electrical intensities that a real sensor provides under laboratory conditions are compared to a mathematical model based on area intersection calculations to simulate the intensities on real flights. Then, four different processing algorithms, two of them rational, and the other two logarithmic, are tested for different spot sizes, which are nonlinear. Proposing an interpolation algorithm based on the four electrical intensities obtained in a semiactive laser quadrant photodetector, laser footprint center estimation is improved for artillery applications. Finally, an example illustrating a projectile flight is employed to compare real and calculated laser footprints in order to select the best algorithm for artillery applications.

scholarly journals Teaching and Learning Physics with Smartphones

2016 ◽  
pp. 866-885 ◽  
Author(s):  
M. Á. González ◽  
Manuel Á. González ◽  
M. Esther Martín ◽  
César Llamas ◽  
Óscar Martínez ◽  
...  
Keyword(s):  
Teaching And Learning ◽  
Low Cost ◽  
Positive Influence ◽  
The Other ◽  
Mobile Technologies ◽  
Traditional Learning ◽  
Know How ◽  
Measurement Devices ◽  
The One ◽  
Physics Experiments

The use of mobile technologies is reshaping how to teach and learn. In this paper the authors describe their research on the use of these technologies to teach physics. On the one hand they develop mobile applications to complement the traditional learning and to help students learn anytime and anywhere. The use of this applications has proved to have very positive influence on the students' engagement. On the other hand, they use smartphones as measurement devices in physics experiments. This opens the possibility of designing and developing low cost laboratories where expensive material can be substituted by smartphones. The smartphones' sensors are reliable and accurate enough to permit good measurements. However, as it is shown with some examples, special care must be taken here if one does not know how these apps used to access the sensors' data are programmed.

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