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ITS » Undergraduate Theses » S1 Teknik Elektro
Posted by aseri at 22/12/2009 13:37:16  •  5127 Views


PERANCANGAN FLOWMETER BERDASARKAN BEDA TEKANAN MENGGUNAKAN MIKROKONTOROLER ATMEGA

DESIGN OF AIR FLOWMETER BASED ON DIFFERENTIAL PRESSURE METHODE USING MICROCONTROLLER ATMEGA

Created by :
Adipranata, Hendra 



SubjectMikrokontroler
Alt. Subject Flow metter
Keywordflowmeter
sensor tekanan
ADC (analog to digital)
mikrokontroler.

Description:

Perkembangan teknologi dan industri telah mendorong berdirinya perusahaan dalam skala besar, seperti perusahaan tambang, kimia, dan otomotif. Salah satu faktor penting yang ada pada industri tersebut yaitu pengukuran debit dari aliran fluida (cairan dan gas) yang ada pada suatu saluran. Pengukuran debit ini dapat bermanfaat untuk mengetahui jumlah pasokan dan kemungkinan adanya kebocoran gas dalam industri pertambangan atau dapat juga sebagai referensi untuk mengatur pasokan fluida sebagai proses pencampuran kimia. Pada tugas akhir ini, penulis mencoba membuat alat berupa flowmeter elektrik yang bekerja berdasarkan beda tekanan untuk mengukur debit aliran udara. Pada pipa saluran terdapat bagian yang menyempit sehingga terjadi perbedaan tekanan udara pada kedua sisi penyempitan. Tiap sisi memiliki saluran pengukuran tekanan yang masuk ke sensor tekanan. Sensor tekanan yang digunakan adalah sensor tekanan semikonduktor MPX5050. Tegangan keluaran dari kedua sensor tekanan akan diatur oleh op-amp yang berfungsi sebagai pengkondisi sinyal dan melakukan diferensiasi agar didapatkan nilai beda tekanan. Sinyal keluaran op-amp ini akan diubah ke digital oleh ICL7109 yang merupakan dual slope ADC 12 bit. Mikrokontroler ATMega akan mengolah data hasil konversi ADC untuk mengubah data beda tekanan yang terbaca menjadi debit udara yang mengalir dan menampilkan nilainya pada display LCD Berdasarkan pengujian dapat diketahui bahwa posisi pengukuran/penyensoran beda tekanan pada jarak 2 mm pada sisi penyempitan (orifice plate) memiliki akurasi pengukuran yang mendekati nilai sebenarnya dengan rata-rata relatif error sebesar 2.53%.


Alt. Description

Development of the industrial technology has been causing established the company in the field of mining, chemical, and otomotif in large scale. One of the important factor in industry is about a measurement, especially to measure flowrate of the fluid (liquid/gas) at some pipe. Measuring flowrate of the fluid can give a lot information such as to know how many total gas in a certaint time and possibility of gas leakage in gas mining industry or can also as reference to handling flowrate of fluid at chemical mixing process. There are many method to make a flowmater either analog or digital depend on kind of sensor that used. At this paper, I try to make the tool a digital flowmeter that work beside of differential pressure to measure flowrate of gas flow. At the pipe design, there part of pipe that narrow so that arouse differential pressure between inlet and outlet of the pipe. Every side has line off that connect to pressure sensor. The pressure sensor that used is MPX5050 that kind of semiconductor pressure sensor The voltage output of two sensor will be processed by operational-amplifier to gaining signal and substraction of voltage output to get better sensitivity and total differential pressure. Output signal from op-amp was changed to digital by ADC(Analog-to Digital Converter) ICL7109. Data output from ICL7109 will be processed by Microcontroller to convert variable of differential pressure to be flowate and bring up at LCD. Based on the test it was found that position sensing of differential pressure at range 2 mm near side of orifice plate (corner taps), has accurate more actual with average relative deviation error (ARD) 2.53%

Contributor:
  1. Rachmad Setiawan, ST, MT
    Dr. Muhammad Rivai ST, MT
Date Create:22/12/2009
Type:Text
Format:pdf
Language:Indonesian
Identifier:ITS-Undergraduate-3100009035919
Collection ID:3100009035919
Call Number:RSE 681.28 Adi p


Source :
Undergraduate Theses, Electrical Engineering, RSE 681.28 Adi p, 2009

Coverage :
ITS Communication Only

Rights :
Copyright @2009 by ITS Library. This publication is protected by copyright and permission should be obtained from the ITS Library prior to any prohibited reproduction, storage in a retrievel system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to ITS Library


Publication URL :
http://digilib.its.ac.id/perancangan-flowmeter-berdasarkan-beda-tekanan-menggunakan-mikrokontoroler-atmega-6445.html




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