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Design of a wireless sensor module for Monitoring Conductor Galloping of Transmission Lines

sensorS 2016年第10期16卷 1657-1657页

作者： Huang, Xinbo Zhao, Long Chen, Guimin Xian Polytech Univ Sch Elect Informat Xian 710048 Peoples R China Xidian Univ Sch Electromech Engn Xian 710070 Peoples R China

Conductor galloping may cause flashovers and even tower collapses. The available conductor galloping monitoring methods often employ acceleration sensors to measure the conductor translations without considering the conductor twist. In this paper, a new sensor for monitoring conductor galloping of transmission lines based on an inertial measurement unit and wireless communication is proposed. An inertial measurement unit is used for collecting the accelerations and angular rates of a conductor, which are further transformed into the corresponding geographic coordinate frame using a quaternion transformation to reconstruct the galloping of the conductor. Both the hardware design and the software design are described in details. The corresponding test platforms are established, and the experiments show the feasibility and accuracy of the proposed monitoring sensor. The field operation of the proposed sensor in a conductor spanning 734 m also shows its effectiveness.

关键词： wireless sensor module transmission lines conductor galloping inertial measurement unit

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SmartCrawler: A Size-Adaptable In-Pipe wireless Robotic System with Two-Phase Motion Control Algorithm in Water Distribution Systems

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sensorS 2022年第24期22卷 9666页

作者： Kazeminasab, Saber Banks, M. Katherine Harvard Univ Cambridge MA 02138 USA Texas A&M Univ Zachry Dept Civil & Environm Engn College Stn TX 77843 USA

Incidents to pipes cause damage in water distribution systems (WDS) and access to all parts of the WDS is a challenging task. In this paper, we propose an integrated wireless robotic system for in-pipe missions that includes an agile, maneuverable, and size-adaptable (9-in to 22-in) in-pipe robot, "SmartCrawler", with 1.56 m/s maximum speed. We develop a two-phase motion control algorithm that enables reliable motion in straight and rotation in non-straight configurations of in-service WDS. We also propose a bi-directional wireless sensor module based on active radio frequency identification (RFID) working in 434 MHz carrier frequency and 120 kbps for up to 5 sensor measurements to enable wireless underground communication with the burial depth of 1.5 m. The integration of the proposed wireless sensor module and the two-phase motion controller demonstrates promising results for wireless control of the in-pipe robot and multi-parameter sensor transmission for in-pipe missions.

关键词： in-pipe robots multi-phase motion controller wireless sensor module wireless control

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ESTABLISHING MODULARIZED ENVIRONMENTAL MEASUREMENTS AND ANALYZING AND APPLYING ENVIRONMENTAL INFORMATION FOR A WINDOWLESS BROILER HOUSE IN TAIWAN

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TRANSACTIONS OF THE ASABE 2019年第2期62卷 303-313页

作者： Li, Y. J. Hsieh, K. W. Chen, S. Lei, P. K. Natl Chung Hsing Univ Dept Bioind Mechatron Engn Taichung Taiwan Natl Taiwan Univ Dept Bioind Mechatron Engn Taipei Taiwan

The purpose of this study was to apply wireless sensor modules to measure the environmental conditions in a windowless broiler house. An environmental index monitoring system was established that automatically estimated the temperature-humidity index (THI) and temperature-humidity-velocity index (THVI) according to the collected database. Finally, prediction of the relationships between the THI or THVI and the feed conversion rate (FCR) was studied. Nine sets of temperature, relative humidity, and wind velocity sensors were used for measuring the inside environment. An additional set was located outside the broiler house. The environmental database used this system of wireless sensors for collecting environmental information, quantifying the environmental indices, and establishing a warning system. The system automatically estimated the THI and THVI according to the database and presented the results in a user interface. Two areas of the broiler house were arranged for daily measurement of feed consumption and individual weight of the broilers for two experiments. These data were applied to calculate the daily weight gain and FCR. The first experiment was conducted from 9 September to 9 October (from summer to autumn) in 2016, and the second experiment was conducted from 3 November to 9 December (from autumn to winter) in 2016. During the experiments, there were no errors in the messages sent by the environmental database and warning system. These results serve as important references for predicting the FCR as well as the THI and THVI. The THVI of the first experiment and the THI of the second experiment predicted the FCR with a good relationship. The results show that the indoor and outdoor THI values could be higher than the standard values. In the FCR statistical analysis, the FCR of the second experiment was lower than the FCR of the first experiment, and they were both lower than the criterion FCR. This implies that opportunities exist for improving the broiler

关键词： Broiler Feed conversion rate Temperature-humidity index Temperature-humidity-velocity index Warning system wireless sensor module

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ON-LINE MONITORING OF END MILLING FORCES USING A THIN FILM BASED wireless sensor module

ON-LINE MONITORING OF END MILLING FORCES USING A THIN FILM B...

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ASME International Manufacturing Science and Engineering Conference

作者： Ma, Lei Melkote, Shreyes N. Morehouse, John B. Castle, James B. Fonda, James W. Georgia Inst Technol George W Woodruff Sch Mech Engn Atlanta GA 30332 USA

ISBN: (纸本)9780791849460

A sensor module that integrates a thin film PVDF piezoelectric strain sensor and a wireless data processing/transmitting platform has been designed and implemented for wireless monitoring of the feed force in the slot end milling process. The module, which is mounted on the tool shank, measures the dynamic strain produced in the tool and transmits data wirelessly to the receiver connected to a data acquisition computer. A first principles model based on the Euler-Bernoulli beam theory and constitutive equations of the piezoelectric sensor material is used to transform the wirelessly obtained data into the feed force acting on the tool in a slot milling operation. The wireless PVDF sensor signal is found to compare well with the expected (or theoretical) sensor signal computed from the measured feed force in slot milling experiments.

关键词： Thin film PVDF sensor wireless sensor module End milling Feed force

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The Design of the Intelligent-Agriculture Control System Based on the Ecological-Data Analysis

The Design of the Intelligent-Agriculture Control System Bas...

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2018 International Conference on Data Science and Information Technology（DSIT 2018）

作者： Yan-ling ZHOU Si-cheng ZHANG Department of Computer Science and Technology Hefei University

The intelligent-agriculture control system is implemented under the precondition of ecological data analysis. The control system of the intelligent agriculture is composed of five parts, including the hardware parts, the local control terminal, the programmable terminal, server and the remote-control terminal. Among them, the hardware part is designed the shape structure, the controlled equipment and all kinds of environmental sensors are installed in the internal. The local terminal is in the core of STC12 series single chip microcomputer. It can implement the independentoperation system. The programmable terminal is PC control program written in C Sharp, it has realized the computer-controlled system. The server uses the PHP WebSocket framework services, implements the user controlling and data forwarding. The remotecontrol terminal is the Web front terminal, including HTML5, CSS3, PHP and JavaScript. The core is the WebSocket that realizes the real-time communication of the server. The intelligent agricultural control system uses B/S and C/S architecture. It can support the local monitoring and the multi-platform remote monitoring. It has two kinds of manual and automatic control modes and can be more flexible to monitor environment and control system according to the need.

关键词： Intelligent Agriculture Data Analysis Real-time Communication wireless sensor module

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Autonomous Monitoring Unit of Fault Condition with Vibration Energy Harvester 15

Autonomous Monitoring Unit of Fault Condition with Vibration...

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IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC)

作者： Vetiska, Vojtech Hyncica, Ondrej Ondrusek, Cestmir Hadas, Zdenek Brno Univ Technol Fac Elect Engn & Commun CS-61090 Brno Czech Republic Brno Univ Technol Fac Mech Engn CS-61090 Brno Czech Republic

ISBN: (纸本)9781479979929

This paper deals with a proposal of an autonomous monitoring unit of vibration overload. This autonomous unit will be used for a monitoring of the motor-generator system in our lab. There was an accident of the tested system in the past and the connection shaft was destroyed due to an unsuitable overloading of the tested system. Several hours before accident the significant mechanical vibrations were observed. This emergency operation could damage other parts of motor-generator system in our lab. Main idea of our development is design of autonomous monitoring unit for alerting of overload operations with significant mechanical vibrations. The energy harvesting method can be used for autonomous powering of this monitoring unit and wireless vibration sensor is connected. The signal of an overloading condition is transmitted to the control panel.

关键词： monitoring energy harvesting vibration power management battery wireless sensor module

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Multiple walker recognition with wireless distributed pyroelectric sensors

Multiple walker recognition with wireless distributed pyroel...

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34th Conference on Infrared Technology and Applications

作者： Li, Nanxiang Hao, Qi Univ Alabama Dept Elect & Comp Engn Tuscaloosa AL 35487 USA

ISBN: (纸本)9780819471314

This paper presents a wireless distributed pyroelectric sensor system, whose sensing visibilities are modulated by Frensnel lens arrays and coded masks, for multiple human walker recognition. One goal of our research is to make wireless distributed pyroelectrie sensor nodes an alternative to the centralized infrared video sensors, with lower cost, lower detectability, lower power consumption and computation, and less privacy infringement. In our previous study, we succeeded in identifying individuals walking along the same path, or just randomly inside a room, with an identification rate higher than 80% for around 10 subjects, only using one wireless sensor node. To improve the identification rate and the number of subjects that can be recognized, one-by-one or simultaneously, we employ multiple sensor nodes to, leverage the performance of the distributed sensor system. The fusion of pyroelectric biometrics from multiple nodes is performed at four different levels: sample, feature, score, and decision. The experimental results show that the proposed pyroelectric sensor system has potential to be a reliable biometric system for the verification/identification of a small group of human objects. Its applications include security monitoring, human-machine interfaces, and virtual environments. Keywords: Hidden Markov model, pyroelectric sensor, walker recognition, wireless sensor module, distributed sensor fusion

关键词： hidden Markov model pyroelectric sensor walker recognition wireless sensor module distributed sensor fusion

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An Activity Monitor Design Based on Wavelet Analysis and wireless sensor Networks

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JOURNAL OF ADVANCED COMPUTATIONAL INTELLIGENCE AND INTELLIGENT INFORMATICS 2007年第3期11卷 261-267页

作者： Tian, Qian Xie, Long Yamauchi, Noriyoshi Waseda Univ Grad Sch Informat Prod & Syst Wakamatsu Ku 2-7 Hibikino Kitakyushu Fukuoka 8080135 Japan

The activity monitor we designed based on wavelet analysis and wireless sensor networks for monitoring human physical condition consists of sensor nodes to sample and transfer data, an FPGA board as a processing center to process data, and a PC to display results. We connect wireless sensor module Ni3 and MEMS accelerometers to make a sensor node small enough to wear and not limited by space. We propose reducing signal noise based on wavelet analysis to ensure a robust data resource and develop a simple wavelet-lifting architecture to decrease the complexity of implementation in the FPGA board. Experimental results demonstrate that our system provides an efficient platform for human physical condition monitoring.

关键词： activity monitor vibration noise reduction wireless sensor module wavelet lifting scheme architecture

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Structural health monitoring using modular wireless sensors

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JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES 2003年第1期14卷 43-56页

作者： Tanner, NA Wait, JR Farrar, CR Sohn, H Los Alamos Natl Lab ESA WR Los Alamos NM 87545 USA Stanford Univ Dept Mech Engn Stanford CA 94305 USA

System integration of an online structural health monitoring module was accomplished by coupling commercially available microclectro-mechanical system sensors and a wireless telemetry unit with damage detection firmware. To showcase the capabilities of the integrated monitoring module, a bolted frame structure was constructed, and the preload in one of the bolted joints was controlled by a piezoelectric stack actuator to simulate gradual deterioration of a bolted connection. Two separate damage detection algorithms were used to classify a joint as damaged or undamaged. First, a statistical process control algorithm was used to monitor the correlation of vibration data from two accelerometers mounted across a joint. Changes in correlation were used to detect damage to the joint. For each joint, data were processed locally on a microprocessor integrated with the wireless module, and the diagnosis result was remotely transmitted to the base monitoring station. Second, a more sophisticated damage detection algorithm combining time series analysis and statistical hypothesis testing was employed using a conventional wired data acquisition system to classify a joint on the demonstration structure as damaged or undamaged.

关键词： structural health monitoring wireless sensor module remote sensing real-time damage detection statistical process control statistical pattern recognition and time series analysis

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