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

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

1,2,†,* , 3,†
, 1,4,†
, 1,†
 and 3,†
Received: 26 April 2013; in revised form: 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%.
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 which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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.

AMA 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(6):8000-8012.

Chicago/Turabian Style

García-Diego, Fernando-Juan; Sánchez-Quinche, Angel; Merello, Paloma; Beltrán, Pedro; Peris, Cristófol. 2013. "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 13, no. 6: 8000-8012.


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