Design Considerations for Real Time Multichannel Stress Analysis with Automatic Strain Gage Data Logger

1980 ◽  
Vol 4 (4) ◽  
pp. 19-23
Author(s):  
Pierre S. Villain
Keyword(s):  
Stress Analysis ◽  
Real Time ◽  
Strain Gage ◽  
Data Logger ◽  
Design Considerations

Strength-based design of a sunflower stalk cutter machine design using finite element analysis and experimental validation

2021 ◽  
pp. 095440622110597
Author(s):  
Gürkan İrsel
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Analysis ◽  
Strain Gage ◽  
Experimental Validation ◽  
Experimental Studies ◽  
Fatigue Analysis ◽  
Structural Stress ◽  
Element Analysis ◽  
Strength Based

In this study, the total algorithm of the strength-based design of the system for mass production has been developed. The proposed algorithm, which includes numerical, analytical, and experimental studies, was implemented through a case study on the strength-based structural design and fatigue analysis of a tractor-mounted sunflower stalk cutting machine (SSCM). The proposed algorithm consists of a systematic engineering approach, material selection and testing, design of the mass criteria suitability, structural stress analysis, computer-aided engineering (CAE), prototype production, experimental validation studies, fatigue calculation based on an FE model and experimental studies (CAE-based fatigue analysis), and an optimization process aimed at minimum weight. Approximately 85% of the system was designed using standard commercially available cross-section beams and elements using the proposed algorithm. The prototype was produced, and an HBM data acquisition system was used to collect the strain gage output. The prototype produced was successful in terms of functionality. Two- and three-dimensional mixed models were used in the structural analysis solution. The structural stress analysis and experimental results with a strain gage were 94.48% compatible in this study. It was determined using nCode DesignLife software that fatigue damage did not occur in the system using the finite element analysis (FEA) and experimental data. The SSCM design adopted a multi-objective genetic algorithm (MOGA) methodology for optimization with ANSYS. With the optimization solved from 422 iterations, a maximum stress value of 57.65 MPa was determined, and a 97.72 kg material was saved compared to the prototype. This study provides a useful methodology for experimental and advanced CAE techniques, especially for further study on complex stress, strain, and fatigue analysis of new systematic designs desired to have an optimum weight to strength ratio.

scholarly journals DATA LOGGER DAN PENGONTROL TEMPERATUR OTOMATIS PADA PEMANAS AIR (HEATER)

2018 ◽  
Vol 9 (2) ◽  
pp. 193-201
Author(s):  
Muhammad Nurul Puji
Keyword(s):  
Real Time ◽  
Time Data ◽  
Data Logger ◽  
Air Heater ◽  
Real Time Data

Pengaturan temperatur (atau besaran fisis lain) banyak dijumpai di lapangan sebagai pengondisi supaya system bekerja pada parameter ukur yang telah ditetapkan. Pengaturan besaran fisis bisa dilakukan dengan mendapatkan nilai dari parameter ukur dengan menggunakan sensor dan diolah sehingga hasil yang diperoleh tersebut dapat dipergunakan untuk mengontrol besaran yang diinginkan melalui aktuator. Pada artikel ini dibuat suatu sistem yang berfungsi sebagai data logger dan pengontrol temperatur pada pemanas air (heater) secara otomatis dengan menggunakan mikrokontroler dan LabVIEW sebagai pengolah dan penyajian datanya. Besaran fisis temperatur diperoleh dengan menggunakan sensor LM35. Kemudian LabVIEW dan mikrokontroler akan berkomunikasi untuk pengambilan data sehingga data temperatur tersebut bisa ditampilkan dalam bentuk grafik secara real time. Data ini kemudian diproses oleh LabVIEW untuk dibandingkan dengan nilai temperatur yang dikehendaki sehingga LabVIEW akan mengontrol pemanas melalui sebuah relay sebagai aktuatornya. Relay akan ON pada saat temperatur berada di bawah batas bawah temperatur yang diset sebelumnya dan akan OFF apabila temperatur lebih tinggi daripada batas atas temperatur yang telah diset sebelumnya. Sehingga temperatur pemanas akan stabil pada temperatur yang dikehendaki.

scholarly journals Desain Data Logger Sensor Suhu Berbasis Mikrokontroler ATMega16 dengan Empat Kanal Input

2020 ◽  
Vol 17 (1) ◽  
pp. 19
Author(s):  
Rismawati Rismawati ◽  
Muhammad Sadli
Keyword(s):  
Real Time ◽  
Data Logger ◽  
Microsoft Excel ◽  
Text Document

Penelitian ini bertujuan untuk merancang dan membuat sistem data logger sensor suhu berbasis mikrokontroler ATMega16 dengan empat kanal input. Rangkaian dibangun menggunakan mikrokontroler ATMega16 yang dilengkapi dengan empat sensor suhu LM35, sebuah LCD sebagai penampil data, dan sebuah modul USB sebagai pengirim data dari modul mikrokontroler ke komputer. Sistem data logger ini dapat menyimpan data hasil pengukuran secara real time setiap detik, dengan format text document (*.txt) dan Microsoft excel (*.xls). Tahapan eksperimen mulai dari perancangan, pembuatan, sampai pengujian sistem Data Logger. Informasi data suhu ditampilkan pada LCD dalam derajat celsius, dan grafik ditampilkan pada layar monitor komputer. Dari hasil pengujian yang dilakukan, sensor suhu LM35 dapat mengukur suhu dari 0°C sampai dengan 100°C, dengan akurasi pembacaan suhu sebesar 99,49%.

Ergonomic Design Considerations for Ultrasound Real-Time Scanners

1985 ◽  
Vol 1 (6) ◽  
pp. 251-254
Author(s):  
Thomas H. Shawker ◽  
Mary Ann Russell
Keyword(s):  
Real Time ◽  
Human Factor ◽  
Study Quality ◽  
Ergonomic Design ◽  
Human Factor Engineering ◽  
Design Considerations

The existing design of ultrasound real-time scanners is not satisfactory from the standpoint of operator comfort or efficient use. As currently configured, these units are cumbersome and fatiguing to use and require unnecessarily complex and time-consuming movements on the part of the operator. Redesigning ultrasound scanners so that they conform to accepted principles of ergonomics or human-factor engineering should make it possible to achieve increased efficiency and improved study quality.

On-Line Remaining Life Assessment of Hot Reheat Pipe Bend

2005 ◽  
Author(s):  
B. K. Dutta ◽  
S. Guin ◽  
M. K. Samal
Keyword(s):  
Stress Analysis ◽  
Real Time ◽  
Control Valve ◽  
Life Assessment ◽  
Fe Model ◽  
Remaining Life ◽  
Process Data ◽  
Pipe Bend ◽  
Constant Weight ◽  
On Line

An ageing in-service Hot Reheat (HRH) pipe bend before Intermediate Pressure (IP) Stop/ Control Valve of a Utility was identified for real-time creep-fatigue damage assessment. A data acquisition system has been installed to record thermal hydraulic parameters, such as pressure, temperature and flow on real time basis. The HRH piping including low pressure bypass line incorporating various supports such as directional restraints, constant weight hangers and spring hangers, was modeled using straight and bend elements. Static stress analysis was performed to find out the forces and moments at either ends of the pipe-bend for sustained and expansion loadings using piping analysis program CAESAR-II. A detailed 3-D Finite Element Model of the pipe bend was also developed using 20-noded brick elements. The 3-D FE model along with material parameters and loading are used by code BOSSES for on-line monitoring of damage. The nodal temperatures (obtained by temperature transient analysis), recorded internal pressure, associated piping loads, etc. are then used in a stress analysis module to calculate stresses at different gauss points of the pipe bend. The temperatures and stresses at different time are then used to compute fatigue and creep damage and to assess growth of different postulated cracks at various locations of pipe bend, as well as remaining life. All the information are upgraded and restart files are saved for successive computation. The real-time process data of the pipe bend are made available to the Researcher’s Desk through Client-Server Network.

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