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Subway rail transit monitoring by built-in sensor platform of smartphone Research Articles
Jian-li Cong, Ming-yuan Gao, Yuan Wang, Rong Chen, Ping Wang,jlcong2019@my.swjtu.edu.cn,gaomingyuan@swu.edu.cn,wangy39@sustech.edu.cn,chenrong@home.swjtu.edu.cn,wping@home.swjtu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 8, Pages 1119-1266 doi: 10.1631/FITEE.1900242
Keywords： 加速度数据；智能监测；内置传感器；智能手机；地铁
利用对称结构和结合差分进化的文化算法检测阵列中的故障传感器 Article
Shafqat Ullah KHAN,Ijaz Mansoor QURESHI,Fawad ZAMAN,Wasim KHAN
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 2, Pages 235-245 doi: 10.1631/FITEE.1500315
Keywords： 文化算法；差分进化；线性对称传感器阵列
The Pendulum Characteristic of Natural Convection Gas and the Application for Sensor
Zhang Fuxue
Strategic Study of CAE 2002, Volume 4, Issue 8, Pages 50-53
It is discovered that the natural convection gas has the pendulum characteristic, so the new concept of gas pendulum is presented. In this paper, the buoyancy lift of natural convection gas is analyzed in a hermetic chamber, and given the formula between the buoyancy lift and the change of temperature. The results of experiment have shown that gas pendulum can be utilized to measure the acceleration and tilt angle as same as solid pendulum and liquid pendulum.
Keywords： gas pendulum characteristic tilt sensor accelerometer
An Area Changeable Capacitive Micro-machined Accelerometer
Li Baoqing,Lu Deren,Wang Weiyuan
Strategic Study of CAE 2000, Volume 2, Issue 2, Pages 36-40
In this paper, a newly developed accelerometer based on the principle of area changeable capacitance is presented at the first time. The movable mass is designed as many bars connected together and suspended by elastic beams. Two comb-shaped fixed electrodes with their fingers side by side are alternately placed under the mass. The mass moves in the direction parallel with the substrate plane under the effect of acceleration. The movable mass and fixed electrodes compose a differential capacitor unit. It is concluded by theoretical analysis that the signal of the acceleration is only proportionally related to the area between movable mass and fixed electrodes but not related to the gap between them. The parasitic capacitance Cp between the mass and fixed electrodes and CB induced by boundary effect both lower the sensitivity of the accelerometer by about 20 % , and lead to a vertical effect on accelerometer that could be ignored if compared with the sensitivity. The quasi-LIGA technology with Ni as structure layer and Cu as sacrificial layer is used to fabricate the sensor chips. The fixed electrodes are fabricated on a glass substrate. A Cu sacrificial layer used to determine the gap between the mass and fixed electrodes is then electroplated with the fixed electrodes layer. Finally, the movable Ni mass is also electroplated with the Cu layer and is released after selective etch of the Cu layer. After packaging in IC ceramic die under atmosphere, the accelerometer is put on avibrator to be tested under a frequency of 25 Hz. The output signal is connected to the interface circuit with electric wires. The experimental results show that the accelerometer has typical sensitivity of 58.1 mV/ (m·s-2) and non-linearity of 4% FS in operating range of 20 m/s2. The obtained non-linearity is not ideal and the reason is discussed based on experimental conditions
Keywords： capacitance accelerometer area changeable
Micro-cantilever Electric Field Sensor Driven by Electrostatic Force Article
Zhifei Han, Jun Hu, Licheng Li, Jinliang He
Engineering 2023, Volume 24, Issue 5, Pages 184-191 doi: 10.1016/j.eng.2022.06.017
With the development of smart grids and the energy Internet, large-scale monitoring of voltage and electric field data is required in all aspects of power systems, which requires the arrangement of various advanced sensors. Measurement of the electric field can replace traditional voltage transformers to realize the non-contact measurement of voltage, which reduces the insulation cost and the difficulty of operation and maintenance. Electric field measurement can also be applied in various other areas, such as equipment fault diagnosis, lightning warning, and electromagnetic environment measurement. Traditional electric field measurement devices, such as field mills, are bulky and costly, so they cannot be arranged flexibly on a large scale. In this paper, we present an electrostatically actuated micro-electric field sensor (E-sensor) with a piezoresistive sensing structure. The presented E-sensor is fabricated into a four-cantilever structure using microfabrication technology. The cantilevers are displaced under the drive of the electrostatic force, and the generated strain is transformed into measurable signals through piezoresistive materials. The presented E-sensor has the advantages of small size, low cost, low power consumption, and easy mass production. Moreover, the E-sensor has a high signal-to-noise ratio, high resolution, and wide measuring range. The experimental results show that the E-sensor has a linear electric field measurement range from 1.1 to 1100 kV·m−1 with an alternating current (AC) resolution of up to 112 V·m−1·Hz−1/2 and a cut-off frequency of 496 Hz, making it suitable for most applications in smart grids and the energy Internet.
Keywords： Microsensors Electric sensing devices Microfabrication Piezoresistive devices
Elizabeth K. Wilson
Engineering 2019, Volume 5, Issue 3, Pages 359-360 doi: 10.1016/j.eng.2019.04.008
Big Data for Precision Medicine
Daniel Richard Leff, Guang-Zhong Yang
Engineering 2015, Volume 1, Issue 3, Pages 277-279 doi: 10.15302/J-ENG-2015075
This article focuses on the potential impact of big data analysis to improve health, prevent and detect disease at an earlier stage, and personalize interventions. The role that big data analytics may have in interrogating the patient electronic health record toward improved clinical decision support is discussed. We examine developments in pharmacogenetics that have increased our appreciation of the reasons why patients respond differently to chemotherapy. We also assess the expansion of online health communications and the way in which this data may be capitalized on in order to detect public health threats and control or contain epidemics. Finally, we describe how a new generation of wearable and implantable body sensors may improve wellbeing, streamline management of chronic diseases, and improve the quality of surgical implants.
Keywords： big data biosensors body-sensing networks implantable sensors clinical decision support systems pharmacogenetics mHealth
Perspectives of Individual-Worn Sensors Assessing Personal Environmental Exposure
Uwe Schlink, Maximilian Ueberham
Engineering 2021, Volume 7, Issue 3, Pages 285-289 doi: 10.1016/j.eng.2020.07.023
Study of Topology Control Based on Genetic Algorithm in Wireless Sensor Networks
Liu Linfeng,zhuanyanyan,Liu Ye
Strategic Study of CAE 2008, Volume 10, Issue 2, Pages 66-71
The chief objective of wireless sensor networks designing is to pr ol ong the lifetime of networks, and topology control is the basic support for the objective. Aiming at the defect is that high redundancy of connectivity or low r obu st of structure in traditional methods, the problem was transformed into a model of multi-criteria minimum spanning tree ultimately, and a genetic algorithm wa s designed to deal with the model. A topology control method based on genetic alg orithm was proposed in this paper. The result of simulations suggests a topology with low total power consumption, high robust structure and low contention amon g nodes can be obtained by this method, and the lifetime of networks can be prol onged on the topology.
Keywords： wireless sensor network topology control multi-criteria minimum spanning tree problems genetic algorithm
Energy-efficient localization and target tracking via underwater mobile sensor networks None
Hua-yan CHEN, Mei-qin LIU, Sen-lin ZHANG
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 8, Pages 999-1012 doi: 10.1631/FITEE.1700598
Keywords： Underwater mobile sensor networks Energy-efficient Sensor localization Target tracking
Application of Hydraulic Pressure Sensore System on Riverb ed ErosionDepth for Real-time Monitoring
Chen Zhijian,Liu Dawei,Zhang Weiwen
Strategic Study of CAE 2007, Volume 9, Issue 5, Pages 17-21
The problem of groundsill eroding is general and important for deep-water foundation in tidal reach. Application, technical difficulty and its settlement scheme of hydraulic pressure sensors system are introduced based on expounding the essentiality of riverbed erosion for real-time monitoring within group piled foundation. Amendment of fluctuant water level is realized by setting a sensor to monitor the tide. The sensors are fixed on the side of the piles reliably and sensor signal is transmitted smoothly with single point setting method. This method shows the characteristics of real-time, continuity, long-term and high precision when applied to the Su-Tong Bridge Project. Based on the results of monitoring, the mechanism of local scour within group piled foundation is analyzed.
Keywords： hydraulic pressure sensor tidal reach group piled foundation local scour real-time monitoring
Cross-layer QoS routing algorithm of metric-based cooperative relay in WSNs
Xu Nan,Sun Yamin,Yu Jiming,Wang Hua
Strategic Study of CAE 2011, Volume 13, Issue 3, Pages 45-49
We proposed a cross-layer QoS routing algorithm which is metric-based cooperative relay initiative forwarding(MCRICQR). Nodes form a metric according to energy, channel, congestion and distance to sink. The node with maximal metric forwards or relays or leapfrogs the data in term of it's own states. Simulation results show that MCRICQR can prolong the lifetime of network and guarantee the required QoS. It also can transmit data in time and load balance which improve the reliability and energy efficiency and throughput of WSN(wireless sensor network).
Keywords： quality of service cross-layer design cooperative relay initiative forwarding wireless sensor network
Rapid thermal sensors with high resolution based on an adaptive dual-comb system Special Feature on Precision Measurement and Inst
Yi-zheng GUO, Ming YAN, Qiang HAO, Kang-wen YANG, Xu-ling SHEN, He-ping ZENG
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5, Pages 674-684 doi: 10.1631/FITEE.1800347
We report a high-resolution rapid thermal sensing based on adaptive dual comb spectroscopy interrogated with a phase-shifted fiber Bragg grating (PFBG). In comparison with traditional dual-comb systems, adaptive dual-comb spectroscopy is extremely simplified by removing the requirement of strict phase-locking feedback loops from the dual-comb configuration. Instead, two free-running fiber lasers are adopted as the light sources. Because of good compensation of fast instabilities with adaptive techniques, the optical response of the PFBG is precisely characterized through a fast Fourier transform of the interferograms in the time domain. Single-shot acquisition can be accomplished rapidly within tens of milliseconds at a spectral resolution of 0.1 pm, corresponding to a thermal measurement resolution of 0.01 °C. The optical spectral bandwidth of the measurement also exceeds 14 nm, which indicates a large dynamic temperature range. It shows great potential for thermal sensing in practical outdoor applications with a loose self-control scheme in the adaptive dual-comb system.
Keywords： Interferometers Fiber sensors Laser spectroscopy
The high-performance micro sensor and digital system for monitoring of the oil and gas field
Zhao Yulong,Niu Zhe,Zhou Guanwu,Zhao Libo,Jiang Zhuangde
Strategic Study of CAE 2013, Volume 15, Issue 1, Pages 99-105
In order to suit for the special requirements of the oil and gas fields, in this paper, the design and fabrication of a high-temperature and high-pressure sensor chip was described. And the related high-performance digital transmitter system was produced. The textual sensor chip was designed to accomplish the thermostability in the high temperature environment which the traditional sensor can't suit for. The linearity and accuracy of the system were promoted by the digital compensation technology. And the associated equipment were integrated into the system. Moreover, in order to meet the requirements of the oil and gas fields inspect managements, the wireless sensor network were designed, which can guarantee the high-efficiency operation and control of the industrial production. Through the experiments, the high-accuracy and reliable of the high-performance micro sensor and digital transmitter system were credible. The accuracy of it is above 0.2 % FS. The system has reached the world class and was especially significant for the domestic petrochemical industry.
Keywords： high-temperature and high-pressure sensor chip high-performance digital transmitter system digital compensation technology wireless sensor network high accuracy
Ningbo Yu, Shirong Wang
Engineering 2019, Volume 5, Issue 1, Pages 164-172 doi: 10.1016/j.eng.2018.11.014
The autonomous exploration and mapping of an unknown environment is useful in a wide range of applications and thus holds great significance. Existing methods mostly use range sensors to generate two-dimensional (2D) grid maps. Red/green/blue-depth (RGB-D) sensors provide both color and depth information on the environment, thereby enabling the generation of a three-dimensional (3D) point cloud map that is intuitive for human perception. In this paper, we present a systematic approach with dual RGB-D sensors to achieve the autonomous exploration and mapping of an unknown indoor environment. With the synchronized and processed RGB-D data, location points were generated and a 3D point cloud map and 2D grid map were incrementally built. Next, the exploration was modeled as a partially observable Markov decision process. Partial map simulation and global frontier search methods were combined for autonomous exploration, and dynamic action constraints were utilized in motion control. In this way, the local optimum can be avoided and the exploration efficacy can be ensured. Experiments with single connected and multi-branched regions demonstrated the high robustness, efficiency, and superiority of the developed system and methods.
Keywords： Autonomous exploration Red/green/blue-depth Sensor fusion Point cloud Partial map simulation Global frontier search
Title Author Date Type Operation
Subway rail transit monitoring by built-in sensor platform of smartphone
Jian-li Cong, Ming-yuan Gao, Yuan Wang, Rong Chen, Ping Wang,jlcong2019@my.swjtu.edu.cn,gaomingyuan@swu.edu.cn,wangy39@sustech.edu.cn,chenrong@home.swjtu.edu.cn,wping@home.swjtu.edu.cn
Journal Article
利用对称结构和结合差分进化的文化算法检测阵列中的故障传感器
Shafqat Ullah KHAN,Ijaz Mansoor QURESHI,Fawad ZAMAN,Wasim KHAN
Journal Article
The Pendulum Characteristic of Natural Convection Gas and the Application for Sensor
Zhang Fuxue
Journal Article
An Area Changeable Capacitive Micro-machined Accelerometer
Li Baoqing,Lu Deren,Wang Weiyuan
Journal Article
Micro-cantilever Electric Field Sensor Driven by Electrostatic Force
Zhifei Han, Jun Hu, Licheng Li, Jinliang He
Journal Article
Perspectives of Individual-Worn Sensors Assessing Personal Environmental Exposure
Uwe Schlink, Maximilian Ueberham
Journal Article
Study of Topology Control Based on Genetic Algorithm in Wireless Sensor Networks
Liu Linfeng,zhuanyanyan,Liu Ye
Journal Article
Energy-efficient localization and target tracking via underwater mobile sensor networks
Hua-yan CHEN, Mei-qin LIU, Sen-lin ZHANG
Journal Article
Application of Hydraulic Pressure Sensore System on Riverb ed ErosionDepth for Real-time Monitoring
Chen Zhijian,Liu Dawei,Zhang Weiwen
Journal Article
Cross-layer QoS routing algorithm of metric-based cooperative relay in WSNs
Xu Nan,Sun Yamin,Yu Jiming,Wang Hua
Journal Article
Rapid thermal sensors with high resolution based on an adaptive dual-comb system
Yi-zheng GUO, Ming YAN, Qiang HAO, Kang-wen YANG, Xu-ling SHEN, He-ping ZENG
Journal Article
The high-performance micro sensor and digital system for monitoring of the oil and gas field
Zhao Yulong,Niu Zhe,Zhou Guanwu,Zhao Libo,Jiang Zhuangde
Journal Article
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