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

Fernando-Juan Garc໚-Diego¹  Angel Sánchez-Quinche²  Paloma Merello¹  Pedro Beltrán¹ 

[1] Departamento de Física Aplicada (U.D. Industriales), Universitat Politècnica de València, Av. de los Naranjos s/n, 46022 Valencia, Spain; E-Mails:;Instituto de Ciencia I Tecnología Animal, Universitat Politècnica de València, Av. de los Naranjos s/n, 46022 València, Spain; E-Mails:

关键词: Hall effect sensors;    milk yield;    multiple regression;    linear magnet position;   

DOI  :  10.3390/s130608000

来源: mdpi

【 摘 要 】

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%.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.