A 3D-Printable smartphone accessory for plant leaf chlorophyll measurement

IF 2 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

HardwareX Pub Date : 2024-10-24 DOI:10.1016/j.ohx.2024.e00597

Karen Ospino-Villalba , Daniel Gaviria , Daniel Pineda , Juan Pérez

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Abstract

Plant health and nutrition are universally inferred from leaf chlorophyll content. This research developed a 3D-printed accessory which attaches to the ambient light sensor in a smartphone to estimate leaf chlorophyll content in five tropical plant species. It unveils 3D printing files and assembling details to freely built the accessory anywhere. It is made from a 3D-printed body, a lighting circuit and common spare parts to measure a 663 nm LED band transmission through intact plant leaves. This chlorophyll absorbing light band allows to measure its concentration. The device was tested by comparing its readings to the universal spectrophotometric test or by leaf parallel measurements with a standard SPAD 502™ meter, and it performed as well as these universal standard methods. Due to well-studied relationships between chlorophyll concentration and nutritional status of plants, and the ubiquitous presence of other sensors in smartphones today, the independent improvement and adoption of this smartphone-connected system would ease the spread of precision farming and digital agronomy practices throughout the different scales of agriculture.

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用于测量植物叶片叶绿素的可 3D 打印智能手机配件

根据叶片叶绿素含量可以普遍推断植物的健康和营养状况。这项研究开发了一种三维打印配件，可与智能手机的环境光传感器相连，用于估算五种热带植物的叶绿素含量。该研究公布了3D打印文件和组装细节，可在任何地方自由制作该配件。它由3D打印主体、照明电路和常用备件组成，用于测量完整植物叶片的663纳米LED波段透射率。通过叶绿素吸收光带可以测量叶绿素浓度。通过将该装置的读数与通用分光光度法测试或使用标准 SPAD 502™ 测量仪进行叶片平行测定进行比较，该装置的性能与这些通用标准方法不相上下。由于叶绿素浓度与植物营养状况之间的关系已得到充分研究，而且如今智能手机中的其他传感器也无处不在，因此独立改进和采用这种与智能手机连接的系统将有助于在不同规模的农业中推广精准农业和数字农艺实践。

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

HardwareX Engineering-Industrial and Manufacturing Engineering

CiteScore

4.10

自引率

18.20%

发文量

124

审稿时长

24 weeks

期刊介绍： HardwareX is an open access journal established to promote free and open source designing, building and customizing of scientific infrastructure (hardware). HardwareX aims to recognize researchers for the time and effort in developing scientific infrastructure while providing end-users with sufficient information to replicate and validate the advances presented. HardwareX is open to input from all scientific, technological and medical disciplines. Scientific infrastructure will be interpreted in the broadest sense. Including hardware modifications to existing infrastructure, sensors and tools that perform measurements and other functions outside of the traditional lab setting (such as wearables, air/water quality sensors, and low cost alternatives to existing tools), and the creation of wholly new tools for either standard or novel laboratory tasks. Authors are encouraged to submit hardware developments that address all aspects of science, not only the final measurement, for example, enhancements in sample preparation and handling, user safety, and quality control. The use of distributed digital manufacturing strategies (e.g. 3-D printing) is encouraged. All designs must be submitted under an open hardware license.