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Proceedings Paper

Signal conditioner for LVDT displacement sensors
Author(s): Marian Blejan; Ioana Ilie; Mircea Comes; Bogdan Lupu
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Paper Abstract

The paper describes a systematic approach regarding the development of a linear position and speed transducer used in hydraulic applications. The electronic module of the transducer is integrated into the LVDT sensor body, to obtain an assembly capable to operate into hydraulic specific environment conditions: vibrations, wide range of operating temperature and high humidity with condensation, significant mechanic and hydraulic shocks, important electromagnetic interference with the intense electric current circuits specific for hydraulic equipment a.o. To obtain the functioning and precision performances needed, it was assessed the use of a reduced number of small size electronic components. It was chosen an original solution for excitation and processing of the signal from the sensor that allows the direct connection of the sensor with the microcontroller used into the electronic module of the transducer. The power supply of the transducer was implemented throughout commutation (buck-converter) providing a superior efficiency and reducing the risk of overheating the electronic module by Joule effect. The performances determined by experiment confirms the designing data by meaning to obtain the position indication of 10000 of stabile divisions and the speed indication of 1000 stabile divisions; the process time of the electronic module is 40ms.

Paper Details

Date Published: 7 January 2009
PDF: 4 pages
Proc. SPIE 7297, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IV, 72972E (7 January 2009); doi: 10.1117/12.823698
Show Author Affiliations
Marian Blejan, National Institute of Research & Development for Optoelectronics (Romania)
Ioana Ilie, National Institute of Research & Development for Optoelectronics (Romania)
Mircea Comes, National Institute of Research & Development for Optoelectronics (Romania)
Bogdan Lupu, National Institute of Research & Development for Optoelectronics (Romania)


Published in SPIE Proceedings Vol. 7297:
Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IV
Paul Schiopu; Cornel Panait; George Caruntu; Adrian Manea, Editor(s)

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