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ITS » Undergraduate Theses » Teknik Mesin
Posted by dewi007 at 05/12/2008 10:55:53  •  7496 Views


KETIDAKPASTIAN ALAT UKUR KERATAAN PERMUKAAN

THE UNCERTAINTY OF SURFACE EVENNESS MEASURING DEVICE

Author :
RIDWAN, USTADI  




ABSTRAK

Alat ukur kerataan permukaan yang telah dibuat oleh saudara Ziyad Auliy dan Rio Borneo P. di Laboratorium Metrologi Industri Dan Kalibrasi Dimensi Jurusan Teknik Mesin FTI ITS dengan memanfaatkan sensor LVDT terdiri dari tiga bagian utama yaitu unit pengkondisian sinyal unit pengolah data dan unit penggerak mekanik. Menurut ISO 9000 menyatakan bahwa setiap alat ukur harus diketahui nilai ketidakpastiannya untuk itu pada tugas akhir ini akan dianalisa ketidakpastian dari alat ukur kerataan tersebut. Analisa ketidakpastian dari alat ukur kerataan permukaan meliputi analisa faktor-faktor penyebab kesalahan alat ukur kerataan permukaan memodelkan faktor-faktor penyebab kesalahan dengan model matematika membuat persamaan ketidakpastian dan menghitung nilai ketidakpastian alat ukur kerataan permukaan tersebut. Dari penelitian yang telah dilakukan dapat diketahui faktorfaktor penyebab ketidakpastian pada alat ukur kerataan permukaan yaitu kesalahan pembacaan alat ukur posisi sensor LVDT tidak tegak lurus terhadap permukaan benda ukur perbedaan temperatur alat ukur dan benda ukur standar perbedaan koefisien ekspansi panas material penyusun alat ukur dan benda ukur serta ketidakpastian benda ukur standar yang digunakan dalam pengukuran. Model persamaan kesalahan alat ukur kerataan adalah E L L L T TTL s s s s - daD a dD . Dan nilai ketidakpastian alat ukur kerataan permukaan adalah 722 m.


ABSTRACT

Measuring device of evenness surface that had been made by Ziyad Auliy and Rio Borneo in Calibration Dimension and Metrology Industry Laboratory at Mechanical Engineering Department of ITS Surabaya operated based on LVDT sensor in which consist of three major unit namely conditioning signal units data processing units and mechanical activator units. Based on ISO 9000 standard conducted that each of measuring devices has to know the value of it uncertainty so that in this final project would be analyzed the value of it uncertainty. The uncertainty analysis method from the device involves caused error factors of devices modeling by using mathematical models arranging the equation and counting the value from uncertainty measuring of device. Based on experiment in laboratory we know that caused errors toward device consist of incorrect perusal of devices no perpendicular position of device toward work piece surface the different of temperature between device and work piece the different of expansion heat coefficient between materials device and work piece and also lack of dimension standard of work piece in measurement process. The equation model of error in measuring at evenness surface is E L L L T TTL s s s s - daD a dD and the value from uncertainty of measuring device of evenness surface is 722 m.



Keywordsalat ukur; kerataan permukaan; ketidakpastian; kesalahan
 
Subject:  Alat pengukur
Contributor
  1. Dr. Ing. I Made Londen Batan, MEng
Date Create: 05/12/2008
Type: Text
Format: pdf.
Language: Indonesian
Identifier: ITS-Undergraduate-3100008031873
Collection ID: 3100008031873
Call Number: RSM 681.25 Rid k


Source
Undegraduate Theses of MEchanical Engineering, RSM 681.25 Rid k, 2008

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