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Sensors 2016, 16(11), 1941; doi:10.3390/s16111941

Wireless Mid-Infrared Spectroscopy Sensor Network for Automatic Carbon Dioxide Fertilization in a Greenhouse Environment

1
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
2
Electrical and Computer Engineering Department, Rice University, 6100 Main Street, Houston 77005, TX, USA
*
Authors to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 18 September 2016 / Revised: 3 November 2016 / Accepted: 8 November 2016 / Published: 18 November 2016
(This article belongs to the Section Physical Sensors)
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Abstract

In this paper, a wireless mid-infrared spectroscopy sensor network was designed and implemented for carbon dioxide fertilization in a greenhouse environment. A mid-infrared carbon dioxide (CO2) sensor based on non-dispersive infrared (NDIR) with the functionalities of wireless communication and anti-condensation prevention was realized as the sensor node. Smart transmission power regulation was applied in the wireless sensor network, according to the Received Signal Strength Indication (RSSI), to realize high communication stability and low-power consumption deployment. Besides real-time monitoring, this system also provides a CO2 control facility for manual and automatic control through a LabVIEW platform. According to simulations and field tests, the implemented sensor node has a satisfying anti-condensation ability and reliable measurement performance on CO2 concentrations ranging from 30 ppm to 5000 ppm. As an application, based on the Fuzzy proportional, integral, and derivative (PID) algorithm realized on a LabVIEW platform, the CO2 concentration was regulated to some desired concentrations, such as 800 ppm and 1200 ppm, in 30 min with a controlled fluctuation of <±35 ppm in an acre of greenhouse. View Full-Text
Keywords: non-dispersive infrared; CO2 sensor; wireless sensor networks (WSN); greenhouse non-dispersive infrared; CO2 sensor; wireless sensor networks (WSN); greenhouse
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MDPI and ACS Style

Wang, J.; Niu, X.; Zheng, L.; Zheng, C.; Wang, Y. Wireless Mid-Infrared Spectroscopy Sensor Network for Automatic Carbon Dioxide Fertilization in a Greenhouse Environment. Sensors 2016, 16, 1941.

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