Autonomous Multisensor System Powered by a Solar Thermoelectric Energy Harvester With Ultralow-Power Management Circuit

被引：55

作者：

Dias, Pedro Carvalhaes ^{[1
]}

Oliveira Morais, Flavio Jose ^{[1
]}

de Morais Franca, Maria Bernadete ^{[2
]}

Ferreira, Elnatan Chagas ^{[1
]}

Cabot, Andreu ^{[3
,4
]}

Siqueira Dias, Jose A. ^{[1
]}

机构：

[1] Univ Estadual Campinas, Sch Elect & Comp Engn, Dept Elect & Microelect, BR-13083820 Campinas, SP, Brazil

[2] Univ Estadual Londrina, BR-86057970 Londrina, Brazil

[3] Catalonia Inst Energy Res, Barcelona 08930, Spain

[4] Inst Catalana Recerca & Estudis Avancats, Barcelona 08930, Spain

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2015年 / 64卷 / 11期

基金：

巴西圣保罗研究基金会;

关键词：

Autonomous sensors; energy harvesting; low-power multisensor systems; power management; solar thermoelectric generators; thermoelectric generators;

D O I：

10.1109/TIM.2015.2444253

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An autonomous multisensor system powered by an energy harvester fabricated with a flat-panel solar thermoelectric generator with an ultralow-power management circuit is presented. The multisensor system was tested in an agricultural application, where every 15 min the values of the temperature, air humidity, and solar radiation have to be measured and stored in a mass memory device (a Secure Digital card), with their respective time stamp. The energy-harvesting switching dc-dc converter is based on a low-input-voltage commercial integrated circuit (LTC3108), which charges a 1.65-F supercapacitor up to 5.0 V. A novel ultralow-power management circuit was developed to replace the internal power management circuitry of the LTC3108, and using this circuit, the operation of the system when no energy can be harvested from the environment is extended from 136 h to more than 266 h. The solar thermoelectric generator used for the energy harvesting is composed of a bismuth telluride thermoelectric generator with a 110-mV/degrees C Seebeck coefficient sandwiched between a 40 cm x 40 cm anodized aluminum flat panel and an aluminum heatsink. On a sunny winter day in the southern hemisphere (12 August 2014, at Campinas, SP-Brazil, Latitude: 22 degrees 54'), the energy supplied by the harvesting system to the supercapacitor was 7 J.

引用

页码：2918 / 2925

页数：8