Pub Date : 2024-07-02DOI: 10.1109/TAFE.2024.3417644
Maria Doglioni;Matteo Nardello;Davide Brunelli
Smart sensors used for intensive crop monitoring require minimal maintenance and should prioritize ecological sustainability. Consequently, battery-free energy harvesting represents a key aspect of sustainable development in smart agriculture. Plant microbial fuel cells (PMFCs) introduce a cutting-edge renewable energy source that scavenges energy from the symbiotic relationship between a plant and electron-generating bacteria in the soil, potentially supplying power as long as the plant lives. Characterizing PMFCs' power production is challenging, as it depends on many factors, such as soil impedance and plant condition. Electrochemical impedance spectroscopy (EIS) is often used in laboratory tests, but it is inefficient to deploy in off-grid contexts. This article introduces an ultralow power EIS biosensor architecture that utilizes PMFCs as an energy source and for the EIS measure. We prove that ultralow-power EIS is compatible with PMFCs' mW-level power production through an implementation that integrates an EIS analog frontend and PMFC-tailored harvesting electronics. The architecture also facilitates PMFC unloading periods, crucial for PMFC recovery and durability. Experimental results show that a full-range EIS sweep (21.3 mHz–21.8 kHz, 19 points) executed with the proposed architecture requires only 3.64 J. We highlight the potential of cost-effective, self-powered EIS in assisting PMFCs' development into reliable energy sources for battery-free nodes. We also demonstrate that plant state, as well as maximum power point could be monitored through ultralow power EIS measurements.
用于密集作物监测的智能传感器需要最少的维护,并应优先考虑生态可持续性。因此,无电池能源采集是智能农业可持续发展的一个关键方面。植物微生物燃料电池(PMFCs)是一种先进的可再生能源,它能从植物与土壤中产生电子的细菌之间的共生关系中收集能量,只要植物存活,就能为其提供电能。表征 PMFC 的发电量具有挑战性,因为它取决于许多因素,如土壤阻抗和植物状况。电化学阻抗光谱法(EIS)通常用于实验室测试,但在离网环境中使用效率较低。本文介绍了一种超低功耗 EIS 生物传感器架构,该架构利用 PMFC 作为能源并用于 EIS 测量。我们通过集成 EIS 模拟前端和 PMFC 量身定制的采集电子设备的实现,证明超低功耗 EIS 可与 PMFC 的毫瓦级发电量兼容。该架构还有利于 PMFC 的卸载期,这对 PMFC 的恢复和耐用性至关重要。实验结果表明,使用所提议的架构执行一次全范围 EIS 扫频(21.3 mHz-21.8 kHz,19 个点)仅需 3.64 焦耳。我们强调了经济高效的自供电 EIS 在帮助 PMFC 发展成为无电池节点的可靠能源方面的潜力。我们还证明,可以通过超低功耗 EIS 测量来监测电站状态和最大功率点。
{"title":"Plant Microbial Fuel Cells: Energy Sources and Biosensors for battery-Free Smart Agriculture","authors":"Maria Doglioni;Matteo Nardello;Davide Brunelli","doi":"10.1109/TAFE.2024.3417644","DOIUrl":"https://doi.org/10.1109/TAFE.2024.3417644","url":null,"abstract":"Smart sensors used for intensive crop monitoring require minimal maintenance and should prioritize ecological sustainability. Consequently, battery-free energy harvesting represents a key aspect of sustainable development in smart agriculture. Plant microbial fuel cells (PMFCs) introduce a cutting-edge renewable energy source that scavenges energy from the symbiotic relationship between a plant and electron-generating bacteria in the soil, potentially supplying power as long as the plant lives. Characterizing PMFCs' power production is challenging, as it depends on many factors, such as soil impedance and plant condition. Electrochemical impedance spectroscopy (EIS) is often used in laboratory tests, but it is inefficient to deploy in off-grid contexts. This article introduces an ultralow power EIS biosensor architecture that utilizes PMFCs as an energy source and for the EIS measure. We prove that ultralow-power EIS is compatible with PMFCs' mW-level power production through an implementation that integrates an EIS analog frontend and PMFC-tailored harvesting electronics. The architecture also facilitates PMFC unloading periods, crucial for PMFC recovery and durability. Experimental results show that a full-range EIS sweep (21.3 mHz–21.8 kHz, 19 points) executed with the proposed architecture requires only 3.64 J. We highlight the potential of cost-effective, self-powered EIS in assisting PMFCs' development into reliable energy sources for battery-free nodes. We also demonstrate that plant state, as well as maximum power point could be monitored through ultralow power EIS measurements.","PeriodicalId":100637,"journal":{"name":"IEEE Transactions on AgriFood Electronics","volume":"2 2","pages":"460-470"},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10582815","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142408787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1109/TAFE.2024.3416221
Divyansh Thakur;Vikram Kumar
In this work, we developed and enhanced an artificial intelligence (AI)-centered hardware framework. This framework integrates the Nvidia Jetson Nano processing unit with a Depth AI camera. Our primary goal was to create an improved version of the YOLOv7 algorithm to quantify apple fruits using edge computing resources. We curated a dataset of 9,000 images of apple fruits to support this effort. Within the enhanced YOLOv7 architecture, we introduced a novel dual attention mechanism called the Global-SE Unified Attention Mechanism (GSEAM). This mechanism was designed to improve the accuracy of object detection by combining spatial and channel-oriented attention mechanisms, significantly enhancing the model.s contextual understanding and object recognition in various settings. The incorporation of GSEAM, along with the Gaussian Error Linear Unit activation function, was a deliberate effort to boost the YOLOv7 architecture.s ability to capture intricate contextual details and hierarchical features. Our system.s performance was rigorously evaluated across six key performance metrics and compared with other pretrained models. We achieved a precision of 99.54%, recall of 98.94%, F1-score of 99.71%, and average precision of 99.13%. This system has proven to be a valuable tool for real-time apple fruit counting, with practical applications for farmers.
{"title":"FruitVision: Dual-Attention Embedded AI System for Precise Apple Counting Using Edge Computing","authors":"Divyansh Thakur;Vikram Kumar","doi":"10.1109/TAFE.2024.3416221","DOIUrl":"https://doi.org/10.1109/TAFE.2024.3416221","url":null,"abstract":"In this work, we developed and enhanced an artificial intelligence (AI)-centered hardware framework. This framework integrates the Nvidia Jetson Nano processing unit with a Depth AI camera. Our primary goal was to create an improved version of the YOLOv7 algorithm to quantify apple fruits using edge computing resources. We curated a dataset of 9,000 images of apple fruits to support this effort. Within the enhanced YOLOv7 architecture, we introduced a novel dual attention mechanism called the Global-SE Unified Attention Mechanism (GSEAM). This mechanism was designed to improve the accuracy of object detection by combining spatial and channel-oriented attention mechanisms, significantly enhancing the model.s contextual understanding and object recognition in various settings. The incorporation of GSEAM, along with the Gaussian Error Linear Unit activation function, was a deliberate effort to boost the YOLOv7 architecture.s ability to capture intricate contextual details and hierarchical features. Our system.s performance was rigorously evaluated across six key performance metrics and compared with other pretrained models. We achieved a precision of 99.54%, recall of 98.94%, F1-score of 99.71%, and average precision of 99.13%. This system has proven to be a valuable tool for real-time apple fruit counting, with practical applications for farmers.","PeriodicalId":100637,"journal":{"name":"IEEE Transactions on AgriFood Electronics","volume":"2 2","pages":"445-459"},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142408682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1109/TAFE.2024.3414953
Stephany Valarezo-Plaza;Julio Torres-Tello;Keshav D. Singh;Steve J. Shirtliffe;S. Deivalakshmi;Seok-Bum Ko
The escalating global demand for food, coupled with challenges in sustaining crop production, deteriorating ocean health, and depleting natural resources, underscores the critical role of agricultural technology. This article addresses the imperative of developing an optimal deep-learning model for predicting canola crop yield using hyperspectral images captured by drone flights. Our primary objective is to identify the most efficient model in terms of performance and size, considering the storage limitations on edge devices like Raspberry Pi 4 (RPi4). We start with the baseline 1D _