Digital Calibration for Current-Loop Output of Piezoresistive Sensors

Chao Yan; Jian Ning Ding; Zong Xing Li; Chao Min Mao

doi:10.4028/www.scientific.net/AMR.143-144.744

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 143-144Digital Calibration for Current-Loop Output of...

Digital Calibration for Current-Loop Output of Piezoresistive Sensors

Abstract:

The precision of piezoresistive sensors is low between wide temperature range .The conditioning result isn’t ideal by analog approaches. Also the efficiency is very low. To improve this condition , a digital approach is introduced. It coverts sensors’ analog signal to digital value, and then uses polynomial and coefficients stored in singlechip to correct the digital value. At last , the singlechip coverts corrected digital value to analog signal to output. Its conditioning principle and calibration process is also described. We realized 4-to-20mA-current-loop-output of piezoresistive sensors using this aprroch. Calibration results show this method is efficient and low cost.

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Periodical:

Advanced Materials Research (Volumes 143-144)

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744-748

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.143-144.744

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Online since:

October 2010

Authors:

Chao Yan, Jian Ning Ding, Zong Xing Li, Chao Min Mao

Keywords:

Current-Loop Output, Digital Calibration, Signal Conditioning

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