Toward a higher yield: a wireless sensor network-based temperature monitoring and fan-circulating system for precision cultivation in plant factories

  • Joe-Air Jiang
  • Min-Sheng Liao
  • Tzu-Shiang Lin
  • Chen-Kang Huang
  • Cheng-Ying Chou
  • Shih-Hao Yeh
  • Ta-Te Lin
  • Wei Fang
Article
  • 61 Downloads

Abstract

Currently, global warming is worsening, causing the difficulty of cultivating crops in open fields, and leading to unstable quality of crops. Plant factories provide a well-controlled growth environment for precisely cultivating plants. However, uneven temperature distributions (UTDs) still occur at each cultivation shelf in plant factories, which decreases the yields (fresh weight) of plants. In this study, a wireless sensor network (WSN)-based automatic temperature monitoring and fan-circulating system for precision cultivation in plant factories is proposed, and it is built upon the technologies of WSN, ordinary kriging spatial interpolation, and automation control, to precisely find the UTD areas of cultivation shelves. Once a UTD area occurs, the fan-circulating system can be triggered immediately to automatically trace the area and circulate the air. This action can effectively improve the air flow in the cultivation zone, providing optimal growth conditions for plants. The proposed system has been deployed in two plant factories that grew Boston lettuces, and a series of performance evaluation experiments were conducted. The experimental results indicate that the fresh weight of the harvested lettuces increases by 61–109% when employing the proposed system that efficiently and significantly decreases the variation of the temperature in the cultivation zone.

Keywords

Plant factory Wireless sensor network (WSN) Fan-circulating system Precision cultivation Ordinary kriging spatial interpolation 

Notes

Acknowledgement

This study was supported by the Ministry of Science and Technology of the Executive Yuan, the Council of Agriculture of the Executive Yuan of Taiwan, and National Taiwan University under contracts MOST 103-2627-M-002-007, MOST 105-2627-M-002-013, 104AS-16.4.1-ST-a6, 106AS-12.4.1-ST-a1, and 106R891004. The authors would also like to thank Mr. Rong-Yuan Liang from the Agricultural Engineering Research Center, Taiwan, for providing the experiment space and plants.

Compliance with ethical standards

Conflicts of interest

The authors declare that they have no conflict of interest.

Informed consent

The authors have read and understand the informed consent provided by the Journal.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Bio-Industrial Mechatronics EngineeringNational Taiwan UniversityTaipeiTaiwan
  2. 2.Education and Research Center for Bio-Industrial AutomationNational Taiwan UniversityTaipeiTaiwan
  3. 3.Department of Medical Research, China Medical University HospitalChina Medical UniversityTaichungTaiwan

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