Earticle

초록

영어

To improve the monitoring accuracy of the crop nitrogen sensor, this paper systematically investigated the optical system parameters affecting the monitoring accuracy of the monitor by analyzing principle of the sensor and the optical system design scheme, and designed a scheme of calibrating optical system parameters which included calibration of single photocell, multi-element combination and integrated optical system. Besides, the parameters calibration of optical system was further conducted by laboratory experiment. The data of rice field experiments were used to validate the effectiveness of the parameter calibration scheme of the optical system. The results indicate that the determination coefficient between normalized difference vegetation index (NDVI) and nitrogen content of rice leaves increases to 0.734 from originally 0.651. That is, the monitoring performance improves significantly after performing system calibration.

목차

Abstract
 1. Introduction
 2. The Optical System of Crop Nitrogen Sensor
 3. Optical System Calibration
  3.1 Calibration Theory of Optical System
  3.2 Methods for Measuring the Responsivity Parameters of Optical System
 4. Calibration Experiments and Results Aanlysis 
  4.1 Calibration Experiments
  4.2 Results Analysis
  4.3 Field Experiments
 5. Conclusions
 Acknowledgements
 Reference

키워드

저자

• Jun Ni [ National Engineering and Technology Center for Agriculture/Jiangsu key laboratory for Information Agriculture, Nanjing Agriculture University, Nanjing 210095, China ]
• Qianqian Jiang [ National Engineering and Technology Center for Agriculture/Jiangsu key laboratory for Information Agriculture, Nanjing Agriculture University, Nanjing 210095, China ]
• Zhigang Xu [ National Engineering and Technology Center for Agriculture/Jiangsu key laboratory for Information Agriculture, Nanjing Agriculture University, Nanjing 210095, China ]
• Weixing Cao [ National Engineering and Technology Center for Agriculture/Jiangsu key laboratory for Information Agriculture, Nanjing Agriculture University, Nanjing 210095, China ]
• Yan Zhu [ National Engineering and Technology Center for Agriculture/Jiangsu key laboratory for Information Agriculture, Nanjing Agriculture University, Nanjing 210095, China ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Control and Automation

• 간기

  월간

• pISSN

  2005-4297

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605