Resumen

MONTALVO, Cristina; BALBAS, Miguel; BLAZQUEZ, Juan  y  CHICHARRO, José M. Parametric Surveillance of Pressure Transmitters Bilinearity through Noise Analysis. Inf. tecnol. [online]. 2010, vol.21, n.2, pp.77-84. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642010000200010.

The aim of this work is detecting the non linearity associated to a Rosemount capacitive transmitter when it suffers oil loss syndrome. The proposed methodology to characterize the non-linearity consists of assuming bilinear dynamic behaviour. The transmitter and sensing line response to a driven white noise is simulated and the signal is treated applying univariant autoregressive models. As a new approach, the simulation is achieved introducing the use of two autoregressive coefficients families to reproduce the bilinearity, omitting the stochastic equation associated to the driven white noise. Base on the analysis of the results, a parametric surveillance index is defined to complement the measurement of the response time, as this time is not the appropriate quantity to detect the bilinearity.

Palabras clave : transmitter; noise analysis; bilinearity; surveillance; stochastic equations.

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