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Vol. 87, Issue 1, January 2008, pp.1-10

 

Bullet

Minimizing Relative Measurement Errors for Sensors Applications

 

Jerzy Kolanko, *Karol Wiśniewski

Institute of Biomedical Engineering and Instrumentation,

Faculty of Fundamental Problems of Technology, Wrocław University of Technology,

Wybrzeże.Wyspiańskiego 27, 50-370 Wrocław, Poland

Tel.: +48 71 3203615, fax: +48 71 3204331

E-mail: Jerzy.Kolanko@pwr.wroc.pl

*3-rd Military Metrology Center, ul. Mieszczańska 11, 50-984 Wrocław, Poland

Tel.: +48 71 7663614, fax: +49 1212 5 143 70 636

E-mail: karol@wisniewski.xcx.pl

 

 

Received: 22 December 2007   /Accepted: 21 January 2008   /Published: 28 January 2008

 

Abstract: General idea of minimizing the relative value of measurement errors resulting from quantization (value axis) and discrimination (time axis) is presented. It's based on the floating point conversion (FPC) thanks to which the reading of a digital instrument always consists of significant digits without zeros in front. Simulations for different conditions of measurement are presented and the errors occurring in frequency/time measurements are compared. The analysis for digital instruments (A/D converters, counters for intelligent sensors) is performed. The stable relative error is the most common result.

 

Keywords: Digital measurement, Discrimination error, Quantization error, Instrumentation, Intelligent sensors.

 

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