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2024 International Conference on Intelligent Systems and Robotics, CISR 2024

作者： Zhang, Peng Kong, Xiangzheng Cheng, Nuo Zhang, Guojun Zhang, Wendong Wang, Renxin State Key Laboratory of Dynamic Testing Technology North University of China Taiyuan China

Based on the piezoresistive effect, MEMS piezoresistive sensors can generate resistance changes with stress variations, making them highly attractive for turbulence detection. Inspired by the lateral line of fish, this paper introduces a bio-inspired beam-cilia vector turbulence sensor. A transient model of the detector under pulsatile flow signals is established using the multi-physics coupling simulation software COMSOL Multiphysics. The cross-sensitivity of the detector's X and Y channels is 0.16%, demonstrating excellent vector properties. The sensitivity of the detector reaches up to 8.3×10-3 Vms2/kg, significantly higher than traditional PNS shear flow sensor probes. This provides a solution for UUV in deep-sea turbulence detection and opens up new exploration methods for UUV in the deep sea. © Published under licence by IOP Publishing Ltd.

关键词： Shear flow

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Tribological Behaviors of Electroless Nickel-Boron Coating on Titanium Alloy Surface

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 309-320页

作者： Yao Jia Jianping Lai Jiaxin Yu Huimin Qi Yafeng Zhang Hongtu He Key Laboratory of Testing Technology for Manufacturing Process in Ministry of Education State Key Laboratory of Environment-Friendly Energy MaterialsSouthwest University of Science and TechnologyMianyang 621010China

Titanium alloys are excellent structural materials in engineering fields,but their poor tribological properties limit their further *** plating is an effective method to enhance the tribological performance of alloys,but it is difficult to efficiently apply to titanium alloys,due to titanium alloy’s strong chemical *** this work,the electroless Nickel-Boron(Ni-B)coating was successfully deposited on the surface of titanium alloy(Ti-6AL-4V)via a new pre-treatment ***,linearly reciprocating sliding wear tests were performed to evaluate the tribological behaviors of titanium alloy and its electroless Ni-B *** was found that the Ni-B coatings can decrease the wear rate of the titanium alloy from 19.89×10^(−3)mm^(3)to 0.41×10^(−3)mm^(3),which attributes to the much higher hardness of Ni-B *** heat treatment,the hardness of Ni-B coating further increases corresponding to coating crystallization and hard phase ***,heat treatment does not improve the tribological performance of Ni-B coating,due to the fact that higher brittleness and more severe oxidative wear exacerbate the damage of heat-treated ***,the Ni-B coatings heat-treated both in air and nitrogen almost present the same tribological *** finding of this work on electroless coating would further extend the practical applications of titanium alloys in the engineering fields.

关键词： Electroless coating Titanium alloy Tribology Wear Heat treatment Nanoindentation

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Langasite-based SAW high-temperature vibration sensor with temperature decoupling

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Science China(Technological Sciences) 2024年第6期67卷 1946-1956页

作者： ZHANG Juan CHENG WenHua WANG Hao ZHANG Lei LI XiangRong MA HongShuai PANG JunQi TAN QiuLin State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan030051China Department of Mechanical Engineering Taiyuan Institute of TechnologyTaiyuan030008China

Monitoring high-temperature vibrations is critical in aerospace engineering,industrial manufacturing,and energy production,where harsh conditions necessitate robust vibration sensors for detecting anomalous ***,the accuracy of such sensors is often compromised by crosstalk between temperature and vibration *** study introduces a high-temperature vibration sensor based on langasite(LGS)surface acoustic wave(SAW)technology,designed to withstand temperatures up to 500℃.The sensor demonstrates high sensitivity,ranging from 12.54 kHz/g at 25℃ to 15.63 k Hz/g at 500℃.A comprehensive mechanical and electrical coupling model for the SAW vibration sensor was developed by integrating theoretical equations with numerical simulations to optimize the sensor's ***,a novel decoupling algorithm for temperature and vibration was established,achieving thermomechanical decoupling with precise vibration *** results indicated a maximum relative deviation of 4.67%for the *** conclusion,the proposed LGS SAW vibration sensor emerges as a promising solution for the accurate detection of multiple parameters in high-temperature vibration monitoring.

关键词： high temperature langasite(LGS) surface acoustic wave(SAW) piezoelectric vibration sensor temperature decoupling

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A novel dual-channel thermo-optic locking method for the whispering gallery mode microresonator

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Chinese Physics B 2024年第5期33卷 438-444页

作者：范文杰刘文耀潘梓文王蓉刘来邢恩博周彦汝唐军刘俊 State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan 030051China Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement North University of ChinaTaiyuan 030051China

Mode locking can be effectively achieved by using the thermo-optic effects in the whispering gallery mode(WGM)optical microcavity,without the help of external ***,it has the advantages of small size,low integration costs,and self-locking,which shows great potential for ***,the conventional single-channel microcavity thermal-locking method that relies solely on internal thermal balance will inevitably be disturbed by the external *** limitation affects the locking time and ***,in this paper,we propose a new method for closed-loop thermal locking of a dual-channel *** thermal locking of the signal laser and the thermal regulation of the control laser are carried out respectively by synchronously drawing a dual-path tapered *** theoretical model of the thermal dynamics of the dual-channel microcavity system is established,and the influence of the control-laser power on the thermal locking of the signal laser is *** deviation between the locking voltage of the signal laser and the set point value is used as a closed-loop feedback parameter to achieve long-term and highly stable mode locking of the signal *** results show that in the 2.63 h thermal-locking test,the locking stability is an order of magnitude higher than that of the single tapered *** solution addresses the issue of thermal locking being disrupted by the external environment,and offers new possibilities for important applications such as spectroscopy and micro-optical sensor devices.

关键词： optical microcavity thermo-optic locking thermal nonlinearity effect

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Design of a high sensitivity and wide range angular rate sensor based on exceptional surface

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Chinese Physics B 2024年第8期33卷 277-286页

作者：丁鑫圣刘文耀王师贤陶煜周彦汝白禹刘来邢恩博唐军刘俊 State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan 030051China Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement North University of ChinaTaiyuan 030051China

It is found that when the parity–time symmetry phenomenon is introduced into the resonant optical gyro system and it works near the exceptional point,the sensitivity can in theory be significantly amplified at low angular ***,in fact,the exceptional point is easily disturbed by external environmental variables,which means that it depends on harsh experimental environment and strong control ability,so it is difficult to move towards practical ***,we propose a new angular rate sensor structure based on exceptional surface,which has the advantages of high sensitivity and high *** system consists of two fiber-optic ring resonators and two optical loop mirrors,and one of the resonators contains a variable ratio coupler and a variable optical *** theoretically analyze the system response,and the effects of phase and coupling ratio on the system ***,compared with the conventional resonant gyro,the sensitivity of this exceptional surface angular rate sensor can be improved by about 300 times at low *** addition,by changing the loss coefficient in the ring resonator,we can achieve a wide range of 600 rad/*** scheme provides a new approach for the development of ultra-high sensitivity and wide range angular rate sensors in the future.

关键词： exceptional surface exceptional points ring resonator angular rate sensing rotational direction recognition wide operating range

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A High-Sensitivity and High-Temperature-Resistant Gas Pressure Sensor Based on Open Hollow-Core Fibers Fabry-Pérot Interferometer Probe

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Journal of Lightwave technology 2025年第12期43卷 5967-5973页

作者： Zhao, Xinyu Ren, Xiwang Bai, Jiandong Yang, Yang Chen, Jiamin Zheng, Yongqiu Xue, Chenyang North Univ-ersity of China State Key Laboratory of Extreme Environment O-ptoelectronic Dynamic Measurement Technology and Instrument Taiyuan030051 China

The pressure sensors capable of high sensitivity and wide measuring range at high temperature are urgently needed in many industrial fields. We propose a novel fiber-optic Fabry-Pérot interferometer (FPI) probe gas pressure sensor based on hollow-core fibers (HCFs) offset fusion splicing. Two HCFs with different inner diameters construct an open FP cavity that allow gas to enter. Pressure is detected by demodulating the change in optical path difference of FPI caused by the variation in refractive index of air. From the experiment results, the sensor has a high sensitivity of 4.04 μm/MPa over large pressure range of 0-14 MPa, which presents the ultra-low pressure-temperature cross-sensitivity of 0.18 kPa/°C with the capability of surviving high temperature up to 1100°C. A fiber Bragg grating is integrated into the FPI structure for temperature sensing and error correction. The proposed sensor has the properties of high-temperature resistance and small size, which can be applied in high-temperature and harsh environment. © 1983-2012 IEEE.

关键词： Fabry-Perot interferometers

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Design of a Full-Excitation Four-Coil Oil Particle Detection Sensor Based on Wheatstone Bridge

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IEEE Sensors Journal 2025年第11期25卷 19451-19461页

作者： Wang, Jialong Bian, Ruiqing Liu, Xinqiang Li, Kai Jia, Wenhui Li, Sicheng Li, Yuan Pan, Jinxiao North University of China State key Laboratory of Extreme Environment Optoelectronic Dynamic Testing Technology and Instrument School of Information and Communication Engineering Taiyuan030051 China 33 RD Research Institute Of China Electronics Technology Group Corporation Taiyuan030032 China

This study addresses the need for micro gear wear particle detection in lubrication systems during the operation of mechanical equipment. The traditional three-coil structure is easy to be disturbed by external noise because of the strong coupling between the excitation coil and the detection coil. Compared with the traditional three-circle structure, the symmetrical coil layout and differential signal detection mechanism can effectively offset the environmental noise, and compensate the impact of environmental changes on the detection results in real time, thus improving the detection accuracy. In addition, the bridge structure optimizes the energy transfer efficiency, reduces coil losses, and improves Q value. The detection accuracy of existing sensor structures is limited by their design, and the response to non-ferromagnetic metal particles is poor. Based on the principle of sensing oil wear particles, the analytical model of coil magnetic field is established. The principle of wear particle detection and coil quality factor are analyzed, and Wheatstone bridge structure sensor for wear particle detection is designed. The influence of composite magnetization coefficient of metal particles on the detection results was investigated by constructing the detection structure model and comparing the quality factors. The finite element magnetic field simulation is carried out, and the signal output is simulated. Through the experimental analysis of sensor data and anti-temperature interference experiment, it is proved that the detection effect is good in 80 environment. The detection capability level factor is introduced to complete the sensor design. The feasibility verification and analysis of the sensor structure show that under the proposed measurement standard, the detection level factor of 500μm iron particles is increased by 83.16%, that of 1000μm iron particles is increased by 31.09%, and that of 500μm copper particles is increased by 7.8 times. The structure sho

关键词： Bridge decks

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A High-temperature Strain Dual Reference Sensor with a Self-compensating Structure

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IEEE Sensors Journal 2025年第11期25卷 19386-19393页

作者： Huang, Junyi Wang, Yu Dong, Helei Tan, Qiulin North University of China Science and Technology on Electronic Test and Measurement Laboratory Taiyuan030051 China North University of China State Key Laboratory of Dynamic Measurement Technology Taiyuan030051 China

To address the challenges of high-temperature strain detection in aero-engines and similar equipment, this study employs screen printing technology to fabricate a self-compensating, temperature-integrated strain sensor capable of operating in extreme thermal environments. The sensor utilizes indium tin oxide (ITO) and platinum as sensitive materials and designs a strain gauge structure with a compensation function. This design enhances the flexibility in selecting compensation materials without compromising strain sensing performance. The sensor's performance was evaluated using a high-temperature muffle furnace and a strain testing system. Results demonstrate its excellent temperature and strain measurement capabilities. At 1250°C, the sensor exhibits an average temperature coefficient of resistance of -388.74 ppm/°C and a resistance drift rate of only 2.64 × 10-5/h over an 8-hour period, indicating its robust stability at high temperatures. Moreover, the sensor shows high sensitivity, accuracy, and excellent linearity with an average gauge factor of -17.8 in a strain characteristic test at 800°C. In the high-temperature measurement experiments, the thermocouple test results were analyzed using a high order polynomial fit, resulting in an average Seebeck coefficient of 47.9 μv/°C for the sensor. The sensor's fabrication process is straightforward and efficient, coupled with its self-compensation characteristics, making it a promising candidate for high-temperature strain sensing applications. © 2001-2012 IEEE.

关键词： Thermocouples

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Ring-array Ultrasound CT Reflection Imaging Applied to Breast Tumor Detection

Ring-array Ultrasound CT Reflection Imaging Applied to Breas...

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2023 International Congress on Ultrasonics, ICU Beijing 2023

作者： Shi, Lifan Huang, Xiao Yuan, Xuting Zhang, Wendong State Key Laboratory of Dynamic Measurement Technology North University of China China

Breast tumor is one of the most common malignant tumors among women worldwide. Ultrasound imaging is a widely used modality for its detection and diagnosis. In this study, we derived the theory of focusing and steering technique based on curved array and verified it by simulation. We proposed an ultrasound CT imaging method based on ring-array with multi-subarray simultaneous transmission and reception. We performed simulation and experimental tests and evaluated the images using SSIM, PSNR and image entropy. The simulation results showed that the proposed focusing and steering technique could accurately focus on the set position. And when the ring-array diameter was 200 mm, the imaging effect reached a better level when the number of array elements increased to 1024, and increasing the number of elements had little effect on the imaging effect. In the experimental test, the best result was obtained when the sub-aperture element number of the ring-array was 1, and the result was better when the ring-array element number was 1024. This result provides an effective significance for ultrasound CT imaging of breast cancer. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Focusing

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A highoutput PDMS-MXene/gelatin triboelectric nanogenerator with the petal surface-microstructure

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Nano Research 2024年第5期17卷 4151-4162页

作者： Zekun Wang Congcong Hao Mingzhe Cai Juan Cui Yongqiu Zheng Chenyang Xue Key Laboratory of Instrumentation Science&Dynamic Measurement Ministry of Education North University of ChinaTaiyuan 030051China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 611731China

Triboelectric nanogenerator(TENG)has a promising future in the field of energy harvesting and self-powered sensing due to their simplicity in structure,low cost,and efficient energy harvesting from the surrounding *** output electrical performance of TENG can be improved by doping the friction material with functional materials and modifying the surface of the friction ***,the current method of adding functional materials to friction materials is costly and wasteful,and the method of modifying the surface structure of friction materials is cumbersome and not easy to *** this work,we present a polydimethylsiloxane(PDMS)-MXene/gelatin triboelectric nanogenerator(PMMG-TENG)based on petal surface-microstructures,which has the advantages of low cost,simple preparation,high output performance,and ecological *** doping 0.03 wt.%of MXene in PDMS,the output electrical performance of TENG can be significantly improved,with an output current increase of up to 139.7%.Four different petals are used as natural molds to prepare *** results show that PMMG-TENG with peony petal surface microstructure has the best electrical performance,and the output current increase of up to 228.17%compared with PMMG-TENG without *** PMMG-TENG with peony petal surface-microstructure exhibits excellent electrical performance,demonstrating a maximum open-circuit voltage of 417.39 V and a maximum short-circuit current of 12.01μA at a size of 3 cm×3 cm,and a maximum power density of 170μW/cm^(2) at a load resistance of 107Ω.The PMMG-TENG’s output performance after 10,000 cycles is consistent with the initial state,highlighting excellent output *** PMMG-TENG can easily light up at least 100 light emitting diodes(LEDs).(operating voltage 3V.)Gelatin film exhibits excellent degradation performance,with complete degradation time of only 150 s in water at a constant temperature of 75℃.PMMG-TENG not only shows excellent performance in

关键词： triboelectric nanogenerator(TENG) petal surface-microstructure gelatin MXene energy harvesting

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