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Sensors 2006, 6(7), 697-711; doi:10.3390/s6070697
Article

Improving the Response of a Load Cell by Using Optimal Filtering

Department of Circuits and Systems in the EUIT de Telecomunicacion at the Universidad Politecnica de Madrid (UPM), Campus Sur UPM, Ctra. Valencia km 7, Madrid 28031, Spain
Received: 26 April 2006 / Accepted: 28 July 2006 / Published: 21 July 2006
(This article belongs to the Special Issue Intelligent Sensors)
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Abstract

Load cells are transducers used to measure force or weight. Despite the fact thatthere is a wide variety of load cells, most of these transducers that are used in the weighingindustry are based on strain gauges. In this paper, an s-beam load cell based on strain gaugeswas suitably assembled to the mechanical structure of several seats of a bus underperformance tests and used to measure the resistance of their mechanical structure to tensionforces applied horizontally to the seats being tested. The load cell was buried in a broad-band noise background where the unwanted information and the relevant signal sometimesshare a very similar frequency spectrum and its performance was improved by using arecursive least-squares (RLS) lattice algorithm. The experimental results are satisfactoryand a significant improvement in the signal-to-noise ratio at the system output of 27 dB wasachieved, which is a good performance factor for judging the quality of the system.
Keywords: strain gauge; load cell; adaptive noise canceller; recursive least-squares lattice adaptive filter strain gauge; load cell; adaptive noise canceller; recursive least-squares lattice adaptive filter
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Hernandez, W. Improving the Response of a Load Cell by Using Optimal Filtering. Sensors 2006, 6, 697-711.

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