The occurrence of intrusions in smart cities has made the development of an inexpensive and effective intrusion detection system essential. Intrusion remains one of the most important aspects of smart city application...
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Considering the issues of the filter order in a signal processing channel with sensors, through the serial link of the same type filters with low order. New approach to define cutoff frequency of such link was obtaine...
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advanced driver assistance system (ADAS) is effectively promoting the vehicular automation level and it is critical to ensure its functional safety. While existing analysis mainly focuses on individual applications of...
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This paper reports a visual-tactile coupling mechanism sensor for force calibration in real time through integrating high sensitivity piezoresistive thin film sensor and high resolution visual-tactile sensing. The ela...
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ISBN:
(纸本)9798350357929
This paper reports a visual-tactile coupling mechanism sensor for force calibration in real time through integrating high sensitivity piezoresistive thin film sensor and high resolution visual-tactile sensing. The elastic layer combined with dispensing-printed flexible electrodes forms piezoresistive sensing units. It employs the spatial weighted fusion algorithm to couple displacement of markers as weights with forces measured by the piezoresistive sensing units. High resolution and improved measurement accuracy at small forces are realized, and the coefficient of variation of measured force is reduced, which contributes to enhancing reliability. The sensor will be served as a reliable data source for future human-machine interaction applications.
A thermoresistive calorimetric airflow sensor with high sensitivity based on Mn-Co-Ni-O (MCN) thin film prepared by magnetron sputtering is reported. The microbridge structure of MCN thin film with a size of 900 mu m ...
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ISBN:
(纸本)9781665493086
A thermoresistive calorimetric airflow sensor with high sensitivity based on Mn-Co-Ni-O (MCN) thin film prepared by magnetron sputtering is reported. The microbridge structure of MCN thin film with a size of 900 mu m x 20 mu m is fabricated by using bulk micromachining technology. The temperature coefficient of resistance (TCR) of the MCN thin film is approximately -34871 ppm/K at 293K and -21060 ppm/K at 373K. The fabricated sensor achieves an ultra-high sensitivity of 28.115 mV/(m/s)/mW with respect to input heating power and amplification factor, which is 10-fold better than the sensor with platinum (Pt) thin film. The proposed sensor demonstrates that the MCN thin film has promising applications in high-sensitivity thermal flow sensors.
Two advancedx-band radars have been developed and deployed by Texas Tech University to provide continuous wind measurements serving project AWAKEN, including the construction of near real-time dual-Doppler synthesize...
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Two advancedx-band radars have been developed and deployed by Texas Tech University to provide continuous wind measurements serving project AWAKEN, including the construction of near real-time dual-Doppler synthesized wind fields covering a large 35 km x 35 km analysis domain. This deployment represents the first overland long duration utilization of the technology, which was configured to document a wide range of wind energy relevant flows spanning turbine inflow/wake flow to regional wind flows and wind plant interactions. The overland environment coupled with technology innovation has led to very high data availability yielding a growing archive of measurements documenting diverse atmospheric phenomena including numerous instances of wind plant interaction. Through the first few project months, data availability greater than 90%, 80% and 70% has been assessed at the ranges of 8 km, 16 km, and 25 km, respectively. Robust data availability coupled with fast radar scan speeds and high along beam measurement resolution position advanced Doppler radar technology to broadly contribute to diverse wind energy measurement applications covering domains sizes that far exceed existing industry standard measurement systems.
In this work, we report the fabrication and characterization of a fiber-optic temperature sensor based on embedding rare-earth nanoparticle emitters (NaYF4: Yb3+, Er3+) inside an optical fiber. A micro channel passing...
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ISBN:
(数字)9781510672093
ISBN:
(纸本)9781510672093;9781510672086
In this work, we report the fabrication and characterization of a fiber-optic temperature sensor based on embedding rare-earth nanoparticle emitters (NaYF4: Yb3+, Er3+) inside an optical fiber. A micro channel passing through the core of single mode fiber (SMF) is fabricated using a femtosecond laser, and the microcavity is subsequently filled with optically active medium. In this work, the NaYF4: Yb3+, Er3+ works as an active medium with temperature-sensitive upconversion luminescence properties to provide temperature measurements allowing for real-time temperature monitoring. The obtained results show promise for addressing temperature-related challenges in various fields, reaffirming the crucial role of optical sensors for a wide range of applications including industrial, medical, and environmental monitoring.
This paper presents the development of a miniature photonic integrated pressure sensor based on a suspended waveguide Bragg grating. The sensor leverages microfabrication techniques to create an ultra-compact sensor d...
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ISBN:
(数字)9781510685130
ISBN:
(纸本)9781510685123;9781510685130
This paper presents the development of a miniature photonic integrated pressure sensor based on a suspended waveguide Bragg grating. The sensor leverages microfabrication techniques to create an ultra-compact sensor die, that interfaces seamlessly with a single optical fiber. The design features a silicon waveguide Bragg grating integrated onto a circular membrane, which is pressure-sensitive. The photonic circuit involving the Bragg grating sensor, interconnecting silicon waveguide and grating coupler was fabricated using the ISIPP50G technology and underwent post-processing to create the suspended Bragg grating sensors. The post-processing involved bonding the photonic integrated circuit (PIC) to a fused silica lid with cylindrical cavities, followed by the removal of the silicon substrate to form an approximately 10 mu m thick oxide membrane. The cylindrical cavities were created using femtosecond laser-induced chemical etching, and the PIC was bonded to the fused silica carrier using an adhesive layer. The sensor's performance was characterized using a custom-designed clamping setup, demonstrating a clear shift in the reflection spectrum of the Bragg grating as a function of applied pressure making it a promising candidate for applications in environments where traditional electrical sensors are unsuitable.
This paper presents a novel approach for fruit quality detection using a multi-modal system that combines sensor data and image processing techniques with deep learning. In the first stage of our experiment, we employ...
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