Sensor system for acquisition of vegetation indexes

IF 1.4 4区农林科学 Q3 AGRICULTURAL ENGINEERING

Revista Brasileira de Engenharia Agricola e Ambiental Pub Date : 2021-04-01 DOI:10.1590/1807-1929/AGRIAMBI.V25N4P264-269

Thales M. de A. Silva, D. Valente, F. Pinto, D. M. Queiroz, N. T. Santos

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引用次数: 2

Abstract

ABSTRACT Vegetation indexes are important indicators of the health and yield of agricultural crops. Among the sensors used to evaluate vegetation indexes, proximal sensors can be used for real-time decision-making. Thus, the objective of this study was to develop a proximal sensor system based on phototransistors to acquire and store the following vegetation indexes: normalized difference vegetation index, simple ratio, wide dynamic range vegetation index, soil-adjusted vegetation index, and optimized soil-adjusted vegetation index. The sensor system was developed using an analog circuit to acquire reflectance data from red and near-infrared bands. The sensor system was calibrated according to the results of a spectroradiometer, using Zoysia japonica grass as the target. An algorithm that calculates and stores vegetation indexes in a file was developed. The Pearson correlation between the vegetation indexes obtained with the sensor system and the spectroradiometer was evaluated. The vegetation indexes presented a Pearson correlation higher than 0.92 to the estimated values by the spectroradiometer. Under the evaluation conditions, the proposed sensor system could be used to determine all vegetation indexes evaluated.

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植被指数采集传感器系统

植被指数是衡量农作物健康和产量的重要指标。在评价植被指数的传感器中，近端传感器可用于实时决策。因此，本研究的目的是开发一种基于光电晶体管的近端传感器系统，以获取和存储以下植被指数:归一化差植被指数、简单比值、宽动态范围植被指数、土壤调整植被指数和优化土壤调整植被指数。该传感器系统采用模拟电路来获取红光和近红外波段的反射率数据。以结缕草为目标，根据光谱辐射计的测量结果对传感器系统进行标定。提出了一种计算并存储植被索引文件的算法。利用传感器系统获得的植被指数与光谱辐射计之间的Pearson相关性进行了评价。植被指数与光谱辐射计估计值的Pearson相关大于0.92。在评价条件下，所提出的传感器系统可用于确定评价的所有植被指标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Brasileira de Engenharia Agricola e Ambiental Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

2.70

自引率

16.70%

发文量

114

审稿时长

3-8 weeks

期刊介绍： A Revista Brasileira de Engenharia Agrícola e Ambiental (Agriambi), periódico oficial da Asociación Latinoamericana y del Caribe de Ingeniería Agrícola (ALIA), é editada mensalmente, no formato eletrônico, pela Unidade Acadêmica de Engenharia Agrícola (UAEA) do Centro de Tecnologia e Recursos Naturais (CTRN) da Universidade Federal de Campina Grande (UFCG), destinando-se à divulgação de artigos científicos originais e inéditos, elaborados em Português, Inglês ou Espanhol. Com o auxílio de pareceres de Consultores, os artigos são aceitos ou não pela Equipe Editorial para publicação na Revista. A Agriambi aceita, também, a submissão de contribuições na modalidade de revisão de literatura.