Improving the Response of a Load Cell by Using Optimal Filtering

Sensors

关键词: strain gauge;    load cell;    adaptive noise canceller;    recursive least-squares lattice adaptive filter;   

DOI  :  10.3390/s6070697

来源: mdpi

【 摘 要 】

Load cells are transducers used to measure force or weight. Despite the fact that there is a wide variety of load cells, most of these transducers that are used in the weighing industry are based on strain gauges. In this paper, an s-beam load cell based on strain gauges was suitably assembled to the mechanical structure of several seats of a bus under performance tests and used to measure the resistance of their mechanical structure to tension forces 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 sometimes share a very similar frequency spectrum and its performance was improved by using a recursive least-squares (RLS) lattice algorithm. The experimental results are satisfactory and a significant improvement in the signal-to-noise ratio at the system output of 27 dB was achieved, which is a good performance factor for judging the quality of the system.

【 授权许可】

Unknown   
© 2006 by MDPI (http://www.mdpi.org).