scholarly journals Low cost NodeMcu based development water rocket measurement system applied to STEM education

2019 ◽  
Author(s):  
Andi Susilo ◽  
Yasmiati ◽  
Ahmad Apandi
Keyword(s):  
Stem Education ◽  
Measurement System ◽  
Velocity Measurement ◽  
High Speed ◽  
Low Cost ◽  
Smartphone Application ◽  
Water Volume ◽  
Learning Tools ◽  
Rocket Measurement ◽  
School Activity

Water rockets have become one of learning tools for STEM Education in schools. Generally water rockets make in school activity have no parachute load, altitude, and velocity measurement. Rocket can go any direction and also will cause hard collision to the ground that break the high speed rocket. It will take time and need more cost to make a new one for students. This study propose the low cost NodeMcu based water rocket measurement system to solve the problem. Altitude and velocity measurement are added and deployment system to release the parachute to make water rocket fall to the ground smoothly. Smartphone application used to monitor altitude and velocity of water rocket. Variables consist of water volume and air pressure. Five experiments had been conducted and recorded. The result found that the system could calculate Altitude, Velocity, and Deployment System also could release the parachute automatically in Coasting Descent position.

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 and Application of an In-Line Measurement System for Polarization Parameters

2013 ◽  
Vol 321-324 ◽  
pp. 447-452
Author(s):  
Zhang Bin Wen ◽  
Mi Zhou ◽  
Zhe Chen ◽  
Yun Han Luo
Keyword(s):  
Measurement System ◽  
High Speed ◽  
Low Cost ◽  
Extinction Ratio ◽  
Polarization State ◽  
Light Polarization ◽  
Polarization Measurement ◽  
Degree Of Polarization ◽  
Stokes Vector ◽  
Line System

An in-line all-fiber measurement system for polarization parameters is designed and fabricated in this paper. This system implements accurate control of polarization state, together with in-line, accurate, and high-speed measurement of Stokes vector. It can measure the light polarization parameters such as States of Polarization (SOP), Degree of Polarization (DOP), Light Polarization Extinction Ratio (LPER), and related losses of polarization. Besides, polarization monitoring and stabilizing can be achieved using this system. Because there is no discrete device concluded, the optical path of this system is completely constituted by optical fiber, which makes the entire system low-cost, with small size and low insertion loss. Keywords: All-fiber, polarization control, polarization measurement, in-line system, Stokes vector

Study on Velocity Measurement of Gas/Solid Flow Based on Electrostatic Sensor

2014 ◽  
Vol 614 ◽  
pp. 275-278
Author(s):  
Yu Tang ◽  
Xiang Deng ◽  
Shuo Tian
Keyword(s):  
Measurement System ◽  
Velocity Measurement ◽  
Flow Measurement ◽  
Cross Correlation ◽  
Low Cost ◽  
High Sensitivity ◽  
Two Phase ◽  
Solid Flow ◽  
Correlation Algorithm ◽  
Electrostatic Induction

Electrostatic sensor is based on the principle of electrostatic induction. It is widely used for gas/solid two-phase flow measurement because it has the advantages of simple structure, high sensitivity, low cost, etc. In this paper, a velocity measurement system of gas/solid flow based on electrostatic sensor and cross-correlation algorithm is discussed. Electrostatic sensor with circular electrode is adopted. By COMSOL optimum simulation, the axial length of the electrode is designed. The signal conditioning circuits are discussed and cross-correlation algorithm is analyzed. The initial experimental results demonstrate that the velocity measurement system of gas/solid flow designed in this paper is feasible.

Study on Doppler Velocity Measurement System

2012 ◽  
Vol 562-564 ◽  
pp. 1240-1243
Author(s):  
Jian Chao Li ◽  
Jun Hong Su ◽  
Ming Gao
Keyword(s):  
Measurement System ◽  
Velocity Measurement ◽  
High Speed ◽  
Processing System ◽  
Measurement Range ◽  
High Accuracy ◽  
Laser Doppler ◽  
Doppler Velocity ◽  
Dual Frequency ◽  
Frequency Laser

In order to satisfy the high accuracy velocity measurement requirement, using the improved dual-frequency laser Doppler velocity measurement principle, designed a set of laser Doppler velocity measurement system. System consists of two parts: optical system and signal acquisition and processing system. Through the establishment of dual-frequency laser Doppler velocity measurement experimental platform for testing, the result shows that the method can be carried on the high accuracy velocity measurement which in high speed move object. Measurement range from 0.1 m/s to 50 m/s, the error is less than 2 percent and it could increase the speed measurement range.

High-Speed Flyer Velocity Measurement System Based on Laser Scattering

2008 ◽  
Vol 35 (7) ◽  
pp. 1050-1054
Author(s):  
贾哲新 Jia Zhexin ◽  
巩轲 Gong Ke ◽  
何淑芳 He Shufang ◽  
霍玉晶 Huo Yujing
Keyword(s):  
Measurement System ◽  
Velocity Measurement ◽  
High Speed ◽  
Laser Scattering

scholarly journals Design and Build of an Electrical Machines’ High Speed Measurement System at Low Cost

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Constantinos C. Kontogiannis ◽  
Athanasios N. Safacas
Keyword(s):  
Operating Systems ◽  
Measurement System ◽  
High Speed ◽  
Low Cost ◽  
Difficult Problem ◽  
Electrical Machines ◽  
Reliable Communication ◽  
Single Task ◽  
Speed Measurement ◽  
Driver Support

The principal objective of this paper is to demonstrate the capability of high speed measurement and acquisition equipment design and build in the laboratory at a very low cost. The presented architecture employees highly integrated market components eliminating thus the complexity of the hardware and software stack. The key element of the proposed system is a Hi-Speed USB to Serial/FIFO development module that is provided with full software and driver support for most popular operating systems. This module takes over every single task needed to get the data from the A/D to the user software gluelessly and transparently, solving this way the most difficult problem in data acquisition systems which is the fast and reliable communication with a host computer. Other ideas tested and included in this document offer Hall Effect measuring solutions using some excellent features and very low cost ICs widely available on the market today.

scholarly journals Determination of PV GeneratorI-V/P-VCharacteristic Curves Using a DC-DC Converter Controlled by a Virtual Instrument

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
E. Durán ◽  
J. M. Andújar ◽  
J. M. Enrique ◽  
J. M. Pérez-Oria
Keyword(s):  
Measurement System ◽  
Virtual Instrument ◽  
High Speed ◽  
Low Cost ◽  
Fast Response ◽  
Prototype System ◽  
System Control ◽  
Systematic Testing ◽  
Testing And Measurement

A versatile measurement system for systematic testing and measurement of the evolution of theI-Vcharacteristic curves of photovoltaic panels or arrays (PV generators) is proposed in this paper. The measurement system uses a circuit solution based on DC-DC converters that involves several advantages relative to traditional methods: simple structure, scalability, fast response, and low cost. The measurement of the desired characteristics of PV generators includes high speed of response and high fidelity. The prototype system built is governed by a microcontroller, and experimental results prove the proposed measurement system useful. A virtual instrument (VI) was developed for full system control from a computer. The developed system enables monitoring the suitable operation of a PV generator in real time, since it allows comparing its actual curves with those provided by the manufacturer.

Development and production experience of the multilayer curtain-coated linerboard of Ji’an PM No. 3,

TAPPI Journal ◽  
2014 ◽  
Vol 13 (2) ◽  
pp. 17-25
Author(s):  
JUNMING SHU ◽  
ARTHAS YANG ◽  
PEKKA SALMINEN ◽  
HENRI VAITTINEN
Keyword(s):  
Titanium Dioxide ◽  
High Speed ◽  
Food Packaging ◽  
Production Efficiency ◽  
Positive Impact ◽  
Low Cost ◽  
Board Structure ◽  
Flexographic Printing ◽  
Curtain Coating ◽  
Coating Formulations

The Ji’an PM No. 3 is the first linerboard machine in China to use multilayer curtain coating technology. Since successful startup at the end of 2011, further development has been carried out to optimize running conditions, coating formulations, and the base paper to provide a product with satisfactory quality and lower cost to manufacture. The key challenges include designing the base board structure for the desired mechanical strength, designing the surface properties for subsequent coating operations, optimizing the high-speed running of the curtain coater to enhance production efficiency, minimizing the amount of titanium dioxide in the coating color, and balancing the coated board properties to make them suitable for both offset and flexographic printing. The pilot and mill scale results show that curtain coating has a major positive impact on brightness, while smoothness is improved mainly by the blade coating and calendering conditions. Optimization of base board properties and the blade + curtain + blade concept has resulted in the successful use of 100% recycled fiber to produce base board. The optical, mechanical, and printability properties of the final coated board meet market requirements for both offset and flexographic printing. Machine runnability is excellent at the current speed of 1000 m/min, and titanium dioxide has been eliminated in the coating formulations without affecting the coating coverage. A significant improvement in the total cost of coated white liner production has been achieved, compared to the conventional concept of using virgin fiber in the top ply. Future development will focus on combining low cost with further quality improvements to make linerboard suitable for a wider range of end-use applications, including frozen-food packaging and folding boxboard.

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