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VMMAO-YOLO:an ultra-lightweight and scale-aware detector for real-time defect detection of avionics thermistor wire solder joints

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Frontiers of Mechanical Engineering 2024年第3期19卷 77-92页

作者： Xiaoqi YANG Xingyue LIU Qian WU Guojun WEN Shuang MEI guanglan liao Tielin SHI School of Mechanical Engineering and Electronic Information China University of GeosciencesWuhan 430074China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

The quality of the exposed avionics solder joints has a significant impact on the stable operation of the inorbit ***,the previously reported inspection methods for multi-scale solder joint defects generally suffer low accuracy and slow detection ***,a novel real-time detector VMMAO-YOLO is demonstrated based on variable multi-scale concurrency and multi-depth aggregation network(VMMANet)backbone and“one-stop”global information gather-distribute(OS-GD)*** with infrared thermography technology,it can achieve fast and high-precision detection of both internal and external solder joint ***,VMMANet is designed for efficient multi-scale feature extraction,which mainly comprises variable multi-scale feature concurrency(VMC)and multi-depth feature aggregation-alignment(MAA)*** can extract multi-scale features via multiple fix-sized and deformable convolutions,while MAA can aggregate and align multi-depth features on the same order for feature *** allows the low-level features with more spatial details to be transmitted in depth-wise,enabling the deeper network to selectively utilize the preceding inference *** VMMANet replaces inefficient highdensity deep convolution by increasing the width of intermediate feature levels,leading to a salient decline in *** OS-GD is developed for efficacious feature extraction,aggregation and distribution,further enhancing the global information gather and deployment capability of the *** a self-made solder joint image data set,the VMMAOYOLO achieves a mean average precision mAP@0.5 of 91.6%,surpassing all the mainstream YOLO-series ***,the VMMAO-YOLO has a body size of merely 19.3 MB and a detection speed up to 119 frame per second,far superior to the prevalent YOLO-series detectors.

关键词： defect detection of solder joints VMMAO-YOLO ultra-lightweight and high-performance multiscale feature extraction VMC and MAA modules OS-GD

Indium-doped perovskite-related cesium copper halide scintillator films for high-performance X-ray imaging

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Photonics Research 2024年第2期12卷 369-376页

作者： RUI LIU ZHIYONG LIU CHENGXU LIN GUANGDA NIU XUNING ZHANG BO SUN TIELIN SHI guanglan liao State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China

Scintillators are widely utilized in high-energy radiation detection in view of their high light yield and short fluorescence decay ***,constrained by their current shortcomings,such as complex fabrication procedures,high temperature,and difficulty in the large scale,it is difficult to meet the increasing demand for costeffective,flexible,and environment-friendly X-ray detection using traditional ***-related cesium copper halide scintillators have recently received multitudinous research due to their tunable emission wavelength,high photoluminescence quantum yield(PLQY),and excellent optical ***,we demonstrated a facile solution-synthesis route for indium-doped all-inorganic cesium copper iodide(Cs_(3)Cu_(2)I_(5))powders and a high scintillation yield flexible film utilizing indium-doped Cs_(3)Cu_(2)I_(5)*** large area flexible films achieved a PLQY as high as 90.2%by appropriately adjusting the indium doping concentration,much higher than the undoped one(73.9%).Moreover,benefiting from low self-absorption and high PLQY,the Cs_(3)Cu_(2)I_(5):In films exhibited ultralow detection limit of 56.2 n Gy/s,high spatial resolution up to 11.3 lp/mm,and marvelous relative light output with strong stability,facilitating that Cs_(3)Cu_(2)I_(5):In films are excellent candidates for X-ray medical *** work provides an effective strategy for developing environment-friendly,low-cost,and efficient scintillator films,showing great potential in the application of highperformance X-ray imaging.

关键词： properties copper halide

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基于拉胀结构的柔性应变传感器制备及应用

华中科技大学学报（自然科学版） 2024年第6期52卷 110-116页

作者：刘智勇甘浪廖广兰程荣沁华中科技大学机械科学与工程学院湖北武汉430074

为使柔性应变传感器兼具高灵敏度和优异稳定性,在聚二甲基硅氧烷(PDMS)基底背面引入具有负泊松比特性的拉胀结构,利用聚乙烯亚胺优异的黏附性和多壁碳纳米管的应变传感特性,采用层层自组装技术沉积聚乙烯亚胺-多壁碳纳米管敏感层,再制... 详细信息

为使柔性应变传感器兼具高灵敏度和优异稳定性,在聚二甲基硅氧烷(PDMS)基底背面引入具有负泊松比特性的拉胀结构,利用聚乙烯亚胺优异的黏附性和多壁碳纳米管的应变传感特性,采用层层自组装技术沉积聚乙烯亚胺-多壁碳纳米管敏感层,再制备电极并进行聚二甲基硅氧烷封装,得到基于拉胀结构的柔性应变传感器.传感器应变系数达499,为无结构应变传感器应变系数的13倍,响应速度快(响应时间为37 ms,弛豫时间为38ms),稳定性好(超过1.5×10^(4)次循环).该柔性应变传感器能够检测人体肢体动作和手腕脉搏等微小生理信号,成功应用于手掌与机械手的实时控制,充分展示出在肢体动作检测和人机交互领域的应用价值.

关键词：柔性应变传感器拉胀结构层层自组装技术人机交互

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血小板全自动免疫荧光染色控制系统设计

工程设计学报 2024年第5期31卷 681-688页

作者：周文韬樊帆林成旭廖广兰刘智勇华中科技大学机械科学与工程学院湖北武汉430074

基于可视化血小板超微结构的血液活检技术在急性缺血性脑卒中等疾病的监测与诊断领域有重要应用。但目前血小板的免疫荧光染色严重依赖手动操作,任务繁重、效率低且一致性差,难以应对日益增长的血液样本监测需求。为了解决人工染色的不... 详细信息

基于可视化血小板超微结构的血液活检技术在急性缺血性脑卒中等疾病的监测与诊断领域有重要应用。但目前血小板的免疫荧光染色严重依赖手动操作,任务繁重、效率低且一致性差,难以应对日益增长的血液样本监测需求。为了解决人工染色的不足以及弥补国内全自动血小板免疫荧光染色设备的空白,首创了一种血小板全自动免疫荧光染色控制系统,其主要包括电源模块、主控模块、传感反馈模块、运动执行模块和上位机软件等。该控制系统能够实现十样本通量的免疫荧光染色操作的精准控制,操作步骤覆盖打孔、封闭、一抗标记、一抗漂洗、二抗标记、二抗漂洗、PFA(polyformaldehyde fixative,多聚甲醛固定液)固定、漂洗等。测试结果表明,所设计的控制系统可将X、Y、Z运动轴的重复定位精度控制在±0.1 mm内,滴加微量试剂精度达到1μL,滴加大量试剂精度达到1 mL,多次实验的故障率小于1%,这可在降低血小板免疫荧光染色成本的同时获得清晰度、可判度与人工染色相当的染色结果。血小板全自动免疫荧光染色控制系统具有稳定性高、准确性高及效率高的优点,所获得的血小板超微结构荧光染色结果在超分辨率显微镜下的清晰度很高,这可为基于超分辨技术的血小板超微结构检测提供高效的实验工具,具有重要的工程意义。

关键词：血小板超微结构检测全自动免疫荧光染色控制系统

Sensitivity Analysis of a Bioinspired Refractive Index Based Gas Sensor

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Journal of Bionic Engineering 2011年第3期8卷 323-334页

作者： Yang Gao Qi Xia guanglan liao Tielin Shi Wuhan National Laboratory for Optoelectronic Wuhan 430074 P. R. Chinao State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan 430074 P. R. China

It was found out that the change of refractive index of ambient gas can lead to obvious change of the color of Morpho butterfly＇s wing. Such phenomenon has been employed as a sensing principle for detecting gas. In the present study, Rigorous Coupled-Wave Analysis （RCWA） was described briefly, and the partial derivative of optical reflection efficiency with respect to the refractive index of ambient gas, i.e., sensitivity of the sensor, was derived based on RCWA. A bioinspired grating model was constructed by mimicking the nanostructure on the ground scale of Morpho didius butterfly＇s wing. The analytical sensitivity was verified and the effect of the grating shape on the reflection spectra and its sensitivity were discussed. The results show that by tuning shape parameters of the grating, we can obtain desired reflection spectra and sensitivity, which can be applied to the design of the bioinspired refractive index based gas sensor.

关键词： bioinspired gas sensor sensitivity diffraction gratings refractive index subwavelength structures

Controlling nested wrinkle morphology through the boundary effect on narrow-band thin films

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Frontiers of Mechanical Engineering 2019年第2期14卷 235-240页

作者： Hanyang XU Tielin SHI guanglan liao Qi XIA The State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

We describe the formation of nested wrinkles created by the thermal mismatch between a narrow-band thin film and a compliant *** a film is described as"narrow-band",it literally means that the film band width is much shorter than its length;more precisely,it means that the width is comparable with the wavelength of the wrinkles.A silicon mask was used during film sputtering to create narrow-band films on poly(dimethylsiloxane)substrate,thus creating regular boundaries to steer local stresses and control wrinkle *** nano-scale wrinkles were found nested within highly ordered micro-scale sinusoidal *** formation of nested wrinkles was explained through the amplitude and wavelength saturation of nano-scale *** disordered morphology of nano-scale wrinkles and the highly ordered morphology of microscale wrinkles were explained by using the boundary effect.

关键词： nested and hierarchical wrinkles morphology amplitude saturation boundary effect

Bio-inspired manufacturing of superwetting surfaces for fog collection and anti-icing applications

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Science China(Technological Sciences) 2022年第9期65卷 1975-1994页

作者： ZHANG XuNing GAN Lang SUN Bo LIU ZhiYong liao guanglan SHI TieLin State key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

As a century-old concept,superwettability has aroused the interest of researchers in the past decades,attributed to the discoveries of the mechanisms of special wetting phenomena in ***-inspired manufacturing of superwetting surfaces for fog collection and anti-icing applications has become mainstream research,potentially alleviating the problem of water shortage and ice *** surfaces for fog collection and anti-icing applications involve a reverse process,in which the former gathers water spontaneously,while the latter repels *** analysis of the two is essential for the comprehensive understanding of superhydrophilic/superhydrophobic surfaces and boosting their ***,wetting theories and basic mechanisms for fog collection and anti-icing are briefly ***,manufacturing methods of bionic structures and surfaces are systematically reviewed after discussing the typical organisms with ***,conclusions are drawn and prospects for future development are proposed.

关键词： bionic manufacturing superwettability fog collection anti-icing

Intelligent diagnosis of the solder bumps defects using fuzzy C-means algorithm with the weighted coefficients

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Science China(Technological Sciences) 2015年第10期58卷 1689-1695页

作者： LU XiangNing SHI TieLin WANG SuYa LI Li Yi SU Lei liao guanglan School of Mechanical & Electrical Engineering Jiangsu Normal University School of Materials Science and Engineering Georgia Institute of Technology State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology

Solder bump technology has been widely used in electronic packaging. With the development of solder bumps towards higher density and finer pitch, it is more difficult to inspect the defects of solder bumps as they are hidden in the package. A nondestructive method using the transient active thermography has been proposed to inspect the defects of a solder bump, and we aim at developing an intelligent diagnosis system to eliminate the influence of emissivity unevenness and non-uniform heating on defects recognition in active infrared testing. An improved fuzzy c-means(FCM) algorithm based on the entropy weights is investigated in this paper. The captured thermograms are preprocessed to enhance the thermal contrast between the defective and good bumps. Hot spots corresponding to 16 solder bumps are segmented from the thermal images. The statistical features are calculated and selected appropriately to characterize the status of solder bumps in FCM clustering. The missing bump is identified in the FCM result, which is also validated by the principle component analysis. The intelligent diagnosis system using FCM algorithm with the entropy weights is effective for defects recognition in electronic packages.

关键词： solder bump Fuzzy C-Means clustering feature weighting principal component analysis

Microstructural evolution,mechanical properties and corrosion behavior of as-cast Mg-5Li-3Al-2Zn alloy with different Sn and Y addition

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Journal of Materials Science & Technology 2021年第13期72卷 16-22页

作者： Xiang Peng Shihao Xu Dehua Ding guanglan liao Guohua Wu Wencai Liu Wenjiang Ding Ding National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Influences of Sn and Y on the microstructure,mechanical properties,and corrosion behavior of as-cast Mg-5 Li-3 Al-2 Zn(LAZ532)alloy were *** addition of Sn and Y refines grains and results in the formation of Mg2 Sn and Al2 Y phases,thus improving the mechanical properties of alloy by second phase strengthening and grain refinement ***-cast LAZ532 alloy shows typical filiform corrosion morphology,and the addition of Sn and Y does not change the corrosion mode of *** LAZ532-0.8 Sn-1.2 Y alloy shows excellent mechanical properties with yield strength of 166.2 MPa,ultimate tensile strength of 228.6 MPa and elongation of 14.8%,and exhibits the best corrosion resistance with the smallest corrosion current density and the lowest anodic dissolution rate.

关键词： Mg-Li alloy Sn Y Mechanical properties Corrosion behavior