Resumo

CERQUERA-YACUMAL, Jorge Andrés; CORDOBA-PAPAMIJA, John Edwin; REALPE-CHAMORRO, Judy Cristina  e  FLOREZ-MARULANDA, Juan Fernando. Measurement of pressure losses using computer vision. Iteckne [online]. 2016, vol.13, n.1, pp.64-73. ISSN 1692-1798.

In a hydraulic circuit, the fluid pressure loss when passing through different sections or accessories, and it can be inspected by observing the fluid level in piezometers. This paper presents a development in artificial vision, which allows on-line measurement of pressure levels recorded in sixteen piezometric columns. The technique of background subtraction based in algorithm on Codebook, combined with morphological filtering and junction blobs, are used to obtain piezometrics levels. The processing algorithm is designed in Open CV and supported on Linux. Coefficients of variation of less than 0.1% and maximum error of 1.4% were obtained.

Palavras-chave : Codebook; computer vision; background subtraction; Instrumentation and measurement; Piezometer.

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