Concept study of an implantable microsystem for electrical resistance and temperature measurements in dairy cows, suitable for estrus detection
| dc.contributor.author | Morais, Raul | |
| dc.contributor.author | Valente, A. | |
| dc.contributor.author | Almeida, J.C. | |
| dc.contributor.author | Silva, Amélia M. | |
| dc.contributor.author | Soares, Salviano | |
| dc.contributor.author | Reis, M.J.C.S. | |
| dc.contributor.author | Valentim, Ramiro | |
| dc.date.accessioned | 2013-02-20T12:34:32Z | |
| dc.date.available | 2013-02-20T12:34:32Z | |
| dc.date.issued | 2006 | |
| dc.description.abstract | In cantle breeding industry, where artificial insemination techniques are employed, the successful detection of estrus onser leads to considerable cost-saving in herd management. one of the most reliable approaches in based on the determination of progesterone concentration in milk. However, these methods rely on the biosensor concept where a biological substrate in used in a chemical-binding reaction to directly or indirectly producem some effect(electrical or light) that is used at the transducer level. These methods present several drawbacks concerning real-time measurements due to the complexity of the reactions involved and reagent/waste handling. Another approach is to combine measurements of temperature and electrical resistance os reproductive tissues to predict estrus. Using a low-power microsystem with wireless capabilities it is possible to take these measurements in situ an more frequently . The proposed mocrosystem comprises a second-order delta-sigma modulator for analog-to-digital conversion and a class-E radio frequently. Since estrus prediction in based on relative changes of the two correlated parameters, calibration is not necessary. Some preliminary results regarding the measuring concept are presented. | por |
| dc.identifier.uri | http://hdl.handle.net/10348/2312 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.relation.ispartof | CECAV - Centro de Ciência Animal e Veterinária | por |
| dc.rights | open access | por |
| dc.subject | Microsystem | por |
| dc.subject | Electrical resistivity sensor | por |
| dc.subject | Wireless interface | por |
| dc.subject | Estrus prediction | por |
| dc.title | Concept study of an implantable microsystem for electrical resistance and temperature measurements in dairy cows, suitable for estrus detection | por |
| dc.type | journal article | por |
| degois.publication.firstPage | 354 | por |
| degois.publication.lastPage | 361 | por |
| degois.publication.title | Sensors and Actuators A - Physical | por |
| dspace.entity.type | Publication | en |
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