| Full text | |
| Author(s): |
Dias, Pedro C.
[1, 2]
;
Cadavid, Doris
[1]
;
Ortega, Silvia
[1]
;
Ruiz, Alejandro
[1]
;
Franca, Maria Bernadete M.
[3]
;
Morais, Flavio J. O.
[2]
;
Ferreira, Elnatan C.
[2]
;
Cabot, Andreu
[1, 4]
Total Authors: 8
|
| Affiliation: | [1] Catalonia Inst Energy Res IREC, Jardins Dones de Negre 1, Barcelona 08930 - Spain
[2] Univ Estadual Campinas, DSIF FEEC, Dept Semicond Instruments & Photon, Av Albert Einstein 400, BR-13083820 Campinas, SP - Brazil
[3] Univ Estadual Londrina, UEL, BR-86057970 Londrina, PR - Brazil
[4] Inst Catalana Recerca & Estudis Avancats ICREA, Jardins Dones de Negre 1, Barcelona 08930 - Spain
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | SENSORS AND ACTUATORS A-PHYSICAL; v. 239, p. 1-7, MAR 1 2016. |
| Web of Science Citations: | 11 |
| Abstract | |
An autonomous single heat pulse probe porous ceramic soil moisture sensor powered by a thermoelectric generator (TEG) is presented. The sensor uses nanostructured thermosensitive resistors fabricated on the same ceramic substrate of the TEG. The nanostructured resistors, fabricated by printing PbS quantum dots, present a very high thermal coefficient (-16 x 10(3) ppm/degrees C) and, used in a bridge configuration with conventional precision and low thermal coefficient SMD metal film resistors, result in a high sensitivity temperature sensor. A laboratory prototype of the sensor showed a voltage variation of 2.4 mV in the output of the bridge when the volumetric water content of the soil changed from 5% to 40%. To complete the autonomous system, we designed an ultra low-power electronic interrogator which, when powered only by the 3 F supercapacitor of the integrated TEG energy harvesting system, was able to take daily measurements up to 5 days without harvesting energy. (C) 2016 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 12/20862-4 - A low-power, low voltage autonomous single probe heat pulse soil moisture sensor based on semiconductors with energy harvesting using thermoelectric generators |
| Grantee: | Pedro Carvalhaes Dias |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 14/01470-3 - Design and fabrication of an autonomous heat pulse probe soil water moisture sensor using semiconductor devices fabricated with sprayed semiconductor ink on alumina, integrated with a bite thermoelectric generator |
| Grantee: | Pedro Carvalhaes Dias |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |