A DYNAMIC MODELLING OF MEASURING UNCERTAINTY OF INDUSTRIAL AND ENVIRONMENTAL MEDIA USING A SIGNAL PROCESSING TECHNIQUE |
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| France Pavlovcic |
- Abstract:
- There are many industrial and environmental media (furnaces, climatic chambers, industrial bathes, the weather etc.) where the quantities of the ambient, such as the temperature of fluids and the relative humidity of mixtures of gases, are measured for the purpose of control, when speaking of industrial media, and observations and analyses in many other cases. The measurements are carried out by sensors and instruments calibrated under stationary conditions. But, in industrial and environmental measuring, these sensors meet dynamic conditions of the measured quantity caused by both transients and instability of the media. The measuring uncertainty contributed by an instability of the medium contains two components: a temporal and a spatial measuring uncertainty corresponding to respective kinds of the instability. The paper deals with a method of an establishment and a propagation of the temporal measuring uncertainty of measured quantity values due to an unstable medium. This method takes into account dynamic characteristics of the employed sensor, its transfer function and time constant. Further on the time function of the quantity of the medium is processed in respect to the measured time-depending values of this quantity. According to the processed time function of the quantity, the measuring uncertainty is determined.
- Keywords:
- uncertainty, industry, environment
- Download:
- PWC-2003-TC12-018.pdf
- DOI:
- -
- Event details
- Event name:
- XVII IMEKO World Congress
- Title:
Metrology in the 3rd Millennium
- Place:
- Dubrovnik, CROATIA
- Time:
- 22 June 2003 - 28 June 2003