Fahmi, Rizan Zairosyi (2018) Penerapan Alat Pembaca Sensor Load Cell Pada Universal Testing Machine (Utm). Diploma thesis, InstitutTeknologiSepuluhNopember.
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Abstract
Suatu logam mempunyai karakteristik yang berbeda atas sifat fisik, mekanik, thermal, dan korosif. Salah satu yang penting dari sifat tersebut adalah sifat mekanik. Sifat mekanik terdiri dari kekerasan, kekuatan, dan ketangguhan. Sifat mekanik merupakan salah satu acuan untuk melakukan proses selanjutnya terhadap suatu material, untuk mengetahui sifat mekanik pada suatu logam harus dilakukan pengujian terhadap logam tersebut (Zaenuri, 2008). Salah satu pengujian yang dilakukan yaitu test uji Tarik dan test uji tekan dengan Universal Testing Machine (UTM), dalam melakukan test uji tarik dan uji tekan terdapat suatu bagian yang dapat mengetahui karakteristik suatu logam dengan menggunakan sensor load cell.
Sensor Load Cell merupakan sebuah transducer gaya yang bekerja berdasarkan prinsip perubahan sebuah material akibat adanya tegangan mekanis yang bekerja. Sensor Load Cell terdapat suatu bagian yang sangat penting yaitu strain gauge. Strain gauge menghasilkan perubahan nilai tahanan yang proporsional dengan perubahan panjang atau jarak (length), sehingga menyebabkan perubahan sinyal tegangan dari perubahan resistansi dalam rangakaian jembatan Wheatstone. Sinyal yang dihasilkan dalam rangakaian jembatan Wheatstone biasanya sangat kecil dan terdapat banyak noise sehingga memerlukan rangakaian signal conditioning yang baik. Bagian rangkaian signal conditioning yang akan digunakan yaitu rangkaian penguat, rangkaian filter dan rangkaian pembatas tegangan. Hasil dari signal conditioning memerlukan Analog-to-Digital Converter (ADC) supaya dapat di baca oleh mikrokontroler.
Hasil pembacaan dari Sensor Load Cell mempunyai rata-rata nilai error ± 3% dari setiap perubahan beban yang di uji, dan Signal conditioning dapat menyaring noise yang dihasilkan dari sinyal keluaran sensor load cell.
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A metal has different characteristics over its physical, mechanical, thermal, and corrosive properties. One of the most important of these properties is the mechanical properties. The mechanical properties consist of violence, strength, and toughness. Mechanical properties is one of the reference to perform further process on a material, to know the mechanical properties in a metal must be tested to the metal. One of the test that is done is tensile test and compression test with Universal Testing Machine (UTM), in conducting test of tensile test and compression test there is a part that can know the characteristics of a metal by using Load Cell sensor.
The Load Cell sensor is a force transducer that works based on the principle of change of a material due to mechanical working stress. Load Cell sensors contain a very important part of strain gauge. The strain gauge produces a change in the resistance value proportional to the change in length or distance, thus causing a change in the voltage signal from the change in resistance in the Wheatstone bridge sequence. The signals generated in the Wheatstone bridge are usually very small and there is a lot of noise and therefore require a good signal conditioning range. Parts of signal conditioning circuit to be used are amplifier circuit, filter circuit and current limiting circuit. The result of signal conditioning requires Analog-to-Digital Converter (ADC) to be read by microcontroller.
The readings from the Load Cell sensor have an average error value of ± 3% of each test load change, and Signal conditioning can filter out the noise generated from the Load Cell sensor output signal.
| Item Type: | Thesis (Diploma) |
|---|---|
| Uncontrolled Keywords: | Universal Testing Machine (UTM), Load Cell sensor, Strain gauge, signal conditioning, Analog-to-Digital Converter (ADC) |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Vocational > 36304-Automation Electronic Engineering |
| Depositing User: | RIZAN ZAIROSYI FAHMI |
| Date Deposited: | 09 Jul 2021 10:24 |
| Last Modified: | 09 Jul 2021 10:24 |
| URI: | http://repository.its.ac.id/id/eprint/57435 |
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