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The spectral calibration method for a crop nitrogen sensor

Jun Ni (Nanjing Agricultural University, Nanjing, China and Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing, China and Jiangsu Collaborative Innovation Center for the Technology and Application of Internet of Things, Nanjing, China)
Jifei Dong (Nanjing Agricultural University, Nanjing, China and Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing, China and Jiangsu Collaborative Innovation Center for the Technology and Application of Internet of Things, Nanjing, China)
Jingchao Zhang (Nanjing Institute of Agricultural Mechanization of National Ministry of Agriculture, Nanjing, China)
Fangrong Pang (Nanjing Agricultural University, Nanjing, China and Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing, China and Jiangsu Collaborative Innovation Center for the Technology and Application of Internet of Things, Nanjing, China)
Weixing Cao (Nanjing Agricultural University, Nanjing, China and Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing, China and Jiangsu Collaborative Innovation Center for the Technology and Application of Internet of Things, Nanjing, China)
Yan Zhu (Nanjing Agricultural University, Nanjing, China and Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing, China and Jiangsu Collaborative Innovation Center for the Technology and Application of Internet of Things, Nanjing, China)

Sensor Review

ISSN: 0260-2288

Article publication date: 18 January 2016

155

Abstract

Purpose

The purpose of this paper is to improve the accuracy and signal-to-noise ratio (SN) of a crop nitrogen sensor.

Design/methodology/approach

The accuracy and wide adaptability of two spectral calibration methods for a crop nitrogen sensor based on standard reflectivity gray plates and standard detector, respectively, were compared.

Findings

The calibration method based on standard detector could significantly improve the measurement accuracy and the SN of this crop nitrogen sensor. When compared with the method based on standard gray plates, the measurement accuracy and the SN of the crop nitrogen sensor calibrated based on the standard detector method improved by 50 and 10 per cent, respectively.

Originality/value

This research analysed the calibration problems faced by the crop nitrogen sensor (type CGMD302) based on standard gray plates, and proposed a sensor calibration method based on a standard detector. Finally, the results of the two calibration methods were compared in terms of measurement accuracy and the SN of the crop nitrogen sensor.

Keywords

Acknowledgements

The authors thank those who helped in this research. This project was also supported by the National Natural Science Foundation of China (Grant No. 31371534), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and the Special Program for Agriculture Science and Technology from Ministry of Agriculture in China (201303109).

Citation

Ni, J., Dong, J., Zhang, J., Pang, F., Cao, W. and Zhu, Y. (2016), "The spectral calibration method for a crop nitrogen sensor", Sensor Review, Vol. 36 No. 1, pp. 48-56. https://doi.org/10.1108/SR-04-2015-0051

Publisher

:

Emerald Group Publishing Limited

Copyright © 2016, Emerald Group Publishing Limited

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