- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Two User Adaptation-Derived Features for Biometrical Classifications of User Identity in 3D-Sensor-Based Body Gesture Recognition Applications
摘要： For human gesture recognition applications, 3D-sensor-based approaches have received considerable attention and are crucial for future applications of an advanced body sensor network (BSN). A practical gesture recognition system is to apply active gesture patterns of a gesture-making user for body action classifications. 3D-sensor-based gesture recognition, categorized as biometric recognition in BSN applications, is greatly lack of the extensible cognition ability due to substandard recognition accuracy on the gesture-making user identity. To overcome this problem, this study proposes an active gesture-based user identity recognition approach using a robust feature design, called user adaptation (UA) features, derived from a UA process. Two different UA features, namely Eigen Centroid-UA and Eigen Transform-UA features, were developed in this study to accurately represent the adaptive learning tendency of gesture recognition for a specific gesture-making user. Compared with traditional 3D sensor gesture-based identity recognition approaches that employ only the feature of fixed body skeleton information without any UA designs, the presented UA-feature can exhibit fine adaptation learning continuously to the specific action user and therefore, superior identity recognition accuracy will be constantly ensured. To demonstrate the efficiency and effectiveness of the developed robust UA features in this paper, experiments on gesture-making user identification by Gaussian mixture model (GMM) applying the proposed Eigen Centroid-UA feature and verification by support vector machine (SVM) applying the proposed Eigen Transform-UA feature were conducted.
关键词： identity recognition,body skeleton,eigenspace,gesture recognition,user adaptation,3D sensor,feature
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE 3rd Optoelectronics Global Conference (OGC) - Shenzhen, China (2018.9.4-2018.9.7)] 2018 IEEE 3rd Optoelectronics Global Conference (OGC) - Large Field of View Binocular Stereo Vision Sensor Calibration Method Based on 3D Virtual Target
摘要： In this paper, to address the problem of high calibration accuracy for the binocular stereo vision sensor of large field of view, a binocular stereo vision sensor calibration method using a three-dimensional virtual target constructed by a precision two-axis turntable, laser tracker and a single calibration reference point is studied. The precision two-axis turntable drives the camera capturing a fixed single optical reference point to make two-dimensional rotation, which construct a precise reference control field and achieve calibration. The internal and external reference calibration of the binocular stereo vision sensor is automatically and efficiently completed by the program control, so the method does not need to adjust or know the positional relationship between the reference point and the camera or the turntable. The error simulation analysis and calibration experiments verify that the calibration method proposed in this paper has high reliability and calibration accuracy.
关键词： binocular stereo vision sensor,large field of view calibration,precision two-axis turntable,laser tracker,3D virtual target
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE Photonics Conference (IPC) - Reston, VA, USA (2018.9.30-2018.10.4)] 2018 IEEE Photonics Conference (IPC) - Modeling and Analysis of SOI Grating Coupler for Bio-sensing Applications
摘要： This work presents, analysis of SOI optical grating structure operating at 1310 nm wavelength. Power coupling analysis between optical source and grating structure is done. The maximum power coupling efficiency of 55.2% is achieved for 500nm grating pitch having 50% duty cycly on 220nm Si-layer.
关键词： Broadband wavelength,Injection angle,Grating coupler,Multi beam,bio-sensor
更新于2025-09-05 23:14:25
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An Object Model for Integrating Diverse Remote Sensing Satellite Sensors: A Case Study of Union Operation
摘要： In the Earth Observation sensor web environment, the rapid, accurate, and unified discovery of diverse remote sensing satellite sensors, and their association to yield an integrated solution for a comprehensive response to specific emergency tasks pose considerable challenges. In this study, we propose a remote sensing satellite sensor object model, based on the object-oriented paradigm and the Open Geospatial Consortium Sensor Model Language. The proposed model comprises a set of sensor resource objects. Each object consists of identification, state of resource attribute, and resource method. We implement the proposed attribute state description by applying it to different remote sensors. A real application, involving the observation of floods at the Yangtze River in China, is undertaken. Results indicate that the sensor inquirer can accurately discover qualified satellite sensors in an accurate and unified manner. By implementing the proposed union operation among the retrieved sensors, the inquirer can further determine how the selected sensors can collaboratively complete a specific observation requirement. Therefore, the proposed model provides a reliable foundation for sharing and integrating multiple remote sensing satellite sensors and their observations.
关键词： sensor web,sensor metadata,object-oriented paradigm,SensorML,remote sensing satellite sensor,sensor sharing and integration
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE ISAF-FMA-AMF-AMEC-PFM Joint Conference (IFAAP) - Hiroshima (2018.5.27-2018.6.1)] 2018 IEEE ISAF-FMA-AMF-AMEC-PFM Joint Conference (IFAAP) - Piezoelectric Resonating Force Sensor in the Second Vibration Mode
摘要： A resonating force sensor is studied, which is composed of a metal bridge coated with a piezoelectric ?lm for force detection. It is thought to operate the sensor at the second ?exural vibration mode having one node at the center of the bridge. Resonance frequency and piezoelectric coupling are investigated in the frame of an analytical model, and compared with ?nite element analysis (FEA) in a desired force range. The resonance frequency-force relation derived from the analytical model is close the the FEA result in the force range. The coupling factor-force relation from the analytical model agrees with the one from FEA in the small force region, but it shows lower coupling than the FEA result in the large force region.
关键词： Resonance sensor,Electromechanical coupling,Piezoelectric sensor,Force sensor,Resonance frequency,Second mode
更新于2025-09-04 15:30:14
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Dose and Single Event Effects on a Color CMOS Camera for Space Exploration
摘要： This paper focuses on the radiation-induced dose and single event effects on a color CMOS camera designed for space missions. Gamma-ray and protons are used to evaluate the tolerance against cumulative dose effects. The dark current of the image sensor is the main parameter impacted by dose effects. Heavy ions testing is performed to evaluate single event effects. SEU, SEFI and SEL have been observed and mitigation techniques were proposed for specific space missions.
关键词： Total Ionizing Dose (TID),Microlens,CMOS Image Sensor (CIS),Single Event Effects (SEE),Displacement Damage Dose (DDD),Pinned Photodiode (PPD),Active Pixel Sensor (APS),Monolithic Active Pixel Sensor (MAPS),Camera,Color filter,Random Telegraph Signal (RTS)
更新于2025-09-04 15:30:14
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[IEEE 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Coimbatore, India (2018.3.1-2018.3.3)] 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Differential Pressure Sensor Using Silicon on Insulator Back to Back Cantilever Structure
摘要： In our day to day life differential pressure sensor can be used in much application. This type of pressure sensors are used for measuring the difference between two different pressure levels. Mostly bulk micro machined fabrication tool is used for fabrication process. Hence these type sensors have low cost and reliable than normal conventional sensor. This sensor is designed mainly to compare both the pressure below and above the liquid and flow rates and measures changes in pressure across restriction. The output differential pressure sensor varies with respect to the change in pressure level at up (or) down cantilever beam. When the pressure value at bottom side is high, when the membrane deflect towards forward direction (i.e.) moves upward. when the pressure value at which the bottom side is lower than the membrane deflects to backward direction (moves downward). This design is mainly used in domestic and industrial application.
关键词： Agriculture Applications,MEMS,Humidity Sensor,Temperature Sensor,Finite Element Method (FEM),micro-Cantilever
更新于2025-09-04 15:30:14
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Performance of CMOS pixel sensor prototypes in ams H35 and aH18 technology for the ATLAS ITk upgrade
摘要： Pixel sensors based on commercial high-voltage CMOS processes are an exciting technology that is considered as an option for the outer layer of the ATLAS inner tracker upgrade at the High Luminosity LHC. Here, charged particles are detected using deep n-wells as sensor diodes with the depleted region extending into the silicon bulk. Both analog and digital readout electronics can be added to achieve different levels of integration up to a fully monolithic sensor. Small scale prototypes using the ams CMOS technology have previously demonstrated that it can achieve the required radiation tolerance of 1015 neq∕cm2 and detection efficiencies above 99.5%. Recently, large area prototypes, comparable in size to a full sensor, have been produced that include most features required towards a final design: the H35demo prototype produced in ams H35 technology that supports both external and integrated readout and the monolithic ATLASPix1 pre-production design produced in ams aH18 technology. Both chips are based on large fill-factor pixel designs, but differ in readout structure. Performance results for H35DEMO with capacitively-coupled external readout and first results for the monolithic ATLASPix1 are shown.
关键词： HV-MAPS,Silicon pixel sensor,Monolithic active pixel sensor,High luminosity LHC,ATLAS ITk upgrade,CMOS
更新于2025-09-04 15:30:14
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[IEEE 2018 11th Global Symposium on Millimeter Waves (GSMM) - Boulder, CO, USA (2018.5.22-2018.5.24)] 2018 11th Global Symposium on Millimeter Waves (GSMM) - 57 GHz 130 uW CMOS Millimeter-Wave Oscillator for Ultra Low Power Sensor Node
摘要： Millimeter-wave sensor network will be conduce to very small and secure wireless tags. Conventional oscillator of millimeter-wave is mainly developed to reduce the phase noise and increase the tuning range and power consumption is larger than 1mW. The ultra-low power consumption oscillator, which has power consumption of less than 1mW, is needed to achieve millimeter-wave sensor network. In this paper, the design methodology is proposed for ultra-low power consumption oscillator. The fabricated IC performs 57.4GHz with 130μW power consumption. The FOM is 10dB higher than those of previously reported.
关键词： Sensor network,Sensor node,Low power consumption,Millimeter-wave oscillator
更新于2025-09-04 15:30:14
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Real-time temperature sensor based on in-fiber Fabry-Perot interferometer embedded in a resin
摘要： A simple to fabricate, cost-effective, robust, and highly accurate fiber optic temperature sensor is proposed and experimentally demonstrated. The sensor head consists of an in-fiber Fabry-Perot interferometer (FFPI) embedded in a mold made of a polyester resin. FFPI, which in general present good strain sensitivity and low temperature sensitivity, was assembled by splicing a microsegment of capillary fiber (CF) of 14.66 μm between two single-mode fibers (SMFs). The reflected spectrum of the FFPI exhibited a single interference dip within a span of 80 nm. The dimensions of the resin mold can be modified by changing the ambient temperature, which in turn changes the length of the FFPI air-cavity. The dip of the reflected spectrum is shifted towards shorter (larger) wavelengths when external temperature is decreased (increased). The large free spectral range (FSR) allowed to monitor the temperature changes by either a wavelength or an intensity interrogation scheme. Using a laser and an optical power meter it was possible to demonstrate a real-time temperature sensor with a sensitivity of -60.79 nW/oC and a resolution of 0.5 oC, in the range of 10-30 oC. We believe that the practicality of this real-time sensor can be very attractive for environmental sensing application.
关键词： Fabry Perot interferometer,Fiber optic sensor,Strain sensor,Polymers
更新于2025-09-04 15:30:14