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Sensors 2013, 13(6), 8000-8012; doi:10.3390/s130608000

Array of Hall Effect Sensors for Linear Positioning of a Magnet Independently of Its Strength Variation. A Case Study: Monitoring Milk Yield during Milking in Goats

1
Departamento de Física Aplicada (U.D. Industriales), Universitat Politècnica de València, Av. de los Naranjos s/n, 46022 Valencia, Spain
2
Centro de Tecnologías Físicas, Unidad Asociada ICMM-CSIC/UPV, Universitat Politècnica de València, Av. de los Naranjos s/n. 46022 Valencia, Spain
3
Instituto de Ciencia I Tecnología Animal, Universitat Politècnica de València, Av. de los Naranjos s/n, 46022 València, Spain
4
Instituto Valenciano de Conservación y Restauración de Bienes Culturales (IVC+R), Complejo Socio-Educativo de Penyeta Roja s/n, 12080 Castellón, Spain
All authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 26 April 2013 / Revised: 10 June 2013 / Accepted: 11 June 2013 / Published: 21 June 2013
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Spain 2013)
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Abstract

In this study we propose an electronic system for linear positioning of a magnet independent of its modulus, which could vary because of aging, different fabrication process, etc. The system comprises a linear array of 24 Hall Effect sensors of proportional response. The data from all sensors are subject to a pretreatment (normalization) by row (position) making them independent on the temporary variation of its magnetic field strength. We analyze the particular case of the individual flow in milking of goats. The multiple regression analysis allowed us to calibrate the electronic system with a percentage of explanation R2 = 99.96%. In our case, the uncertainty in the linear position of the magnet is 0.51 mm that represents 0.019 L of goat milk. The test in farm compared the results obtained by direct reading of the volume with those obtained by the proposed electronic calibrated system, achieving a percentage of explanation of 99.05%. View Full-Text
Keywords: Hall effect sensors; milk yield; multiple regression; linear magnet position Hall effect sensors; milk yield; multiple regression; linear magnet position
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

García-Diego, F.-J.; Sánchez-Quinche, A.; Merello, P.; Beltrán, P.; Peris, C. Array of Hall Effect Sensors for Linear Positioning of a Magnet Independently of Its Strength Variation. A Case Study: Monitoring Milk Yield during Milking in Goats. Sensors 2013, 13, 8000-8012.

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