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Theory, design, fabrication and testing / Moganadass Virachami

Theory, design, fabrication and testing_Moganadass Virachami_E3_2005_NI
Transduser digunakan sebagai penderia, kerana dengan beberapa pengecualian, kecekapan penukarannya adalah amat rendah dan untuk mencapai kecekapan penukaran yang lebih tinggi, transduser harus menggunakan isyarat elektrik pada amplifier. Peranti piezoelektrik (pengesan tekanan) juga merupakan tansduser yang penting (digunakan pada kedua-dua arah). Penggunaan kristal piezoelektrik dalam transduser ditumpukan terutamanya untuk penukaran antara gelombang tekanan dalam cecair atau gas dan isyarat elektrik AC. Penukaran tenaga dari bentuk elektrikal kepada tegasan boleh dicapai oleh solenoid yang berteras magnet. Transduser Tekanan beroperasi untuk menukarkan tekanan boleh ubah fizikal kepada suatu isyarat keluaran elektrik yang berkadaran kepada ukuran tekanan. Bekalan output adalah dalam bentuk isyarat arus atau voltan. Isyarat piawai membenarkan penggabungan transduser, pengawal, komputer atau pengawal aturcara terstor (SPC) dari pengilang berbeza tanpa menyebabkan sebarang masalah. Pempiawaian tersebut mempermudahkan kerja keduadua pengilang dan juga perekabentuk atau sebarang syarikat yang mengendalikan peralatan dan loji. Transduser Tekanan Berkemuatan beroperasi sebagai peranti pengesan tekanan yang mengesan perubahan kemuatan berdasarkan perubahan tekanan yang diaplikasikan pada transduser. Pengukuran perubahan ini (keluaran) ditakrifkan dalam bentuk isyarat voltan menggunakan suatu litar pengukuran khas yang dibina menggunakan penguat kendalian, resistor, kapasitor dan suis. Keputusan pengukuran dan kesimpulan projek yang telah dikendalikan ke atas transduser tekanan berkemuatan disertakan pada bahagian terakhir laporan ini bersama-sama dengan rekabentuk transduser tekanan dan litar pengukuran. _________________________________________________________________________________________ Transducers are predominantly used as sensors, because with a few exceptions, their efficiency of conversion is very low and to achieve a higher efficiency of conversion, transducers need to use the electrical signals to the amplifier. The piezoelectric device (pressure sensing) is also a useful transducer (can be used in either direction). Transducer use of piezoelectric crystals is mainly confined to the conversion between pressure waves in a liquid or gas and electrical AC signals. The conversion of energy from an electrical form into stress can be achieved by the magnetically cored solenoids. Pressure Transducer operates to convert the physical variable pressure into an electrical output signal that is proportional to the pressure measurement. The output supply is in form of current or voltage signals. Standard signals allow combining transducers, controllers, computers or stored program controllers (SPC) of different manufacturers without incurring any problem. The standardization simplifies both works as the manufacturers and also as the designer or any company operating instruments and plants. Capacitive Pressure Transducer operates as a pressure sensing device which senses the changes of capacitance according to the changes of pressure applied to the transducer. The measurement of these changes (output) is defined in form of voltage signal using a special measurement circuit is build out of operational amplifiers, resistors, capacitors and switch. The measurement results and conclusion of the project conducted on the capacitive pressure transducer is presented in the last part of this report together with design of the pressure transducer and the measurement circuit.
Contributor(s):
Moganadass Virachami - Author
Primary Item Type:
Final Year Project
Language:
English
Subject Keywords:
Transducers; piezoelectric device; cored solenoids.
First presented to the public:
3/1/2005
Original Publication Date:
8/15/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 96
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-08-15 11:19:45.067
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Nor Hayati Ismail

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