Detailed design of the vacuum feedthrough for the ion cyclotron radio frequency （ICRF） antenna in EAST, along with an electro-analysis and thermal structural analysis, is pre- sented. The electric field, the voltage...Detailed design of the vacuum feedthrough for the ion cyclotron radio frequency （ICRF） antenna in EAST, along with an electro-analysis and thermal structural analysis, is pre- sented. The electric field, the voltage standing wave ratio （VSWR） and the stresses in the vacuum feedthrough are studied. A method using the rings of oxygen-free copper as the cushion and macro- beam plasma arc welding is applied in the assembly to protect the ceramic from being damaged during welding. The vacuum leak test on the prototype of vacuum feedthrough is introduced.展开更多
MEMS vacuum packaging is now the impediment of the MEMS appliance in some specified fields. The major problem of current packaging approach is that the packaging process cannot meet the requirement of the ultra low le...MEMS vacuum packaging is now the impediment of the MEMS appliance in some specified fields. The major problem of current packaging approach is that the packaging process cannot meet the requirement of the ultra low leak. But the process cannot be improved with the existing technology. We propose a novel approach for MEMS vacuum packaging which can remarkably lower the leak rate. This paper analyzed the vacuum maintaining time of the vacuum packaging and compared the current design and new packaging method.展开更多
在聚变装置真空检漏领域中,未来聚变装置涉氚运行,检漏人员无法进入装置检漏,这使得这项任务极其困难和耗时。为实现聚变装置泄漏设备的快速准确检测,本文以6自由度机械臂为研究对象,提出了一种GV2-YOLOv5的真空设备检测方法用于真空检...在聚变装置真空检漏领域中,未来聚变装置涉氚运行,检漏人员无法进入装置检漏,这使得这项任务极其困难和耗时。为实现聚变装置泄漏设备的快速准确检测,本文以6自由度机械臂为研究对象,提出了一种GV2-YOLOv5的真空设备检测方法用于真空检漏机器人对真空设备进行识别和定位喷氦。在该方法中,结合轻量级Ghost Net V2网络构建C3GhostV2模块,同时使用轻量的Ghost卷积提取目标特征,从而降低模型参数量,提高计算速度;在特征融合网络中添加Bottleneck Transformers和ECA注意力机制,提高网络特征提取能力以及加强模型通道特征。实验结果表明,在自制数据集上,改进后的模型平均精度为93.2%,相比YOLOv5s提高了1.4%,模型参数量减少了29.5%,检测速度为92 fps,满足实时性与准确性的需求,为真空检漏机器人目标识别与定位提供了一种的解决方案。展开更多
文摘Detailed design of the vacuum feedthrough for the ion cyclotron radio frequency （ICRF） antenna in EAST, along with an electro-analysis and thermal structural analysis, is pre- sented. The electric field, the voltage standing wave ratio （VSWR） and the stresses in the vacuum feedthrough are studied. A method using the rings of oxygen-free copper as the cushion and macro- beam plasma arc welding is applied in the assembly to protect the ceramic from being damaged during welding. The vacuum leak test on the prototype of vacuum feedthrough is introduced.
基金the High-tech Research and Development Program of China under Grant No.2005AA404260
文摘MEMS vacuum packaging is now the impediment of the MEMS appliance in some specified fields. The major problem of current packaging approach is that the packaging process cannot meet the requirement of the ultra low leak. But the process cannot be improved with the existing technology. We propose a novel approach for MEMS vacuum packaging which can remarkably lower the leak rate. This paper analyzed the vacuum maintaining time of the vacuum packaging and compared the current design and new packaging method.
文摘在聚变装置真空检漏领域中,未来聚变装置涉氚运行,检漏人员无法进入装置检漏,这使得这项任务极其困难和耗时。为实现聚变装置泄漏设备的快速准确检测,本文以6自由度机械臂为研究对象,提出了一种GV2-YOLOv5的真空设备检测方法用于真空检漏机器人对真空设备进行识别和定位喷氦。在该方法中,结合轻量级Ghost Net V2网络构建C3GhostV2模块,同时使用轻量的Ghost卷积提取目标特征,从而降低模型参数量,提高计算速度;在特征融合网络中添加Bottleneck Transformers和ECA注意力机制,提高网络特征提取能力以及加强模型通道特征。实验结果表明,在自制数据集上,改进后的模型平均精度为93.2%,相比YOLOv5s提高了1.4%,模型参数量减少了29.5%,检测速度为92 fps,满足实时性与准确性的需求,为真空检漏机器人目标识别与定位提供了一种的解决方案。
