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A new low-cost sensing system for rapid ring estimation of woody plants to support tree management

Information Processing in Agriculture 2020年第3期7卷 369-374页

作者： Bayu Taruna Widjaja Putra Laboratory of Precision Agriculture and Geo-Informatics Faculty of Agricultural TechnologyJember UniversityJember 68121East JavaIndonesia

Continuous monitoring of the diameter and rings of woody plants is required to evaluate agroforestry products such as *** measurement is still widely used to monitor tree growth but it is *** addition,advanced equipment and software are available but they require technical skills and are costly for ***,we have developed a rapid and low-cost sensing system for estimating the diameters of woody *** apparatus includes a sensor and Internet of things(IoT)technology,which can be used under any network *** apparatus was tested with various trees and the results were compared with those obtained by manual *** findings using the newly developed system demonstrate a strong correlation(R2=0.99)with the manually performed *** rapid and low-cost diameter sensing system will be useful in the expansion of agroforestry sensing networks and beneficial to ***,the system will assist in informing foresters of potential problems in timely manner.

关键词： Tree allometry IoT Woody plants sensing system Precision Agriculture Forestry Management

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Triboelectric nanogenerators enabled internet of things:A survey

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Intelligent and Converged Networks 2020年第2期1卷 115-141页

作者： Jiarong Li Changsheng Wu Ishara Dharmasena Xiaoyue Ni Zihan Wang Haixu Shen Shao-Lun Huang Wenbo Ding Tsinghua-Berkeley Shenzhen Institute Tsinghua UniversityShenzhen 518055China Institute for Bioelectronics Northwestern UniversityEvanstonIL 60208USA. School of Mechanical Electrical and Manufacturing Engineering Loughborough UniversityLoughboroughLE113TUUK Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27708USA Department of Materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA

As pioneering information technology,the Internet of Things(IoT)targets at building an infrastructure of embedded devices and networks of connected objects,to offer omnipresent ecosystem and interaction across billions of smart devices,sensors,and *** deployment of IoT calls for decentralized power supplies,selfpowered sensors,and wireless transmission technologies,which have brought both opportunities and challenges to the existing solutions,especially when the network scales *** Triboelectric Nanogenerators(TENGs),recently developed for mechanical energy harvesting and mechanical-to-electrical signal conversion,have the natural properties of energy and information,which have demonstrated high potentials in various applications of *** context provides a comprehensive review of TENG enabled IoT and discusses the most popular and significant ***,the basic principle of TENG is re-examined in this ***,a comprehensive and detailed review is given to the concept of IoT,followed by the scientific development of the TENG enabled ***,the future of this evolving area is addressed.

关键词： Triboelectric Nanogenerator(TENG) Internet of Things(IoT) energy harvesting sensing system smart cities

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Signal Processing Scheme for Increasing system Resolution in Determination of the Scattering Position in an OCT system

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Chinese Journal of Lasers 2001年第4期10卷 31-36页

作者： SONG Guiju WANG Xiangzhao FANG Zujie (Information Optics Laboratory, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China) Received July 20, 2000 Revised manuscript received Aug. 22, 2000

In an OCT sensing system, the optical coherence length of the light source determines the spatial resolution, which is within the range of tens of micrometers. In this paper, by removing high frequency noise with average operation and fitting the measured discrete sampled data with a continuous function, the theoretical resolution can be improved. The experimental results obtained show the short term repeatability to be better than 0.4 μm after signal processing.

关键词： optical coherence tomography obscure media optical fiber interferometer sensing system

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