Surface contouring by optical edge projection based on a continuous wavelet transform

A novel optical edge projection method for surface contouring of an object with low reflectivity is presented. A structured light edge is projected onto a dark surface, and the image is captured by a CCD camera. The surface profile of the object is then evaluated by an active triangular projection technique, and a whole-field three-dimensional contour of the object is obtained by scanning the optical edge over the entire object surface. An edge detection method based on a continuous wavelet transform (CWT) is employed to determine the location of the optical edge. The method of optical edge detection is described, and characteristic details of gray-level distribution along the edge are analyzed. It is shown that the proposed wavelet edge detection method is not dependent on any threshold values; hence the true edge position can be determined without subjective selection. A black low-reflectivity object surface made from woven carbon fiber is measured, and the experimental results show that the profile of a woven carbon fiber can be obtained by the proposed method.     

空调与海水淡化联合运行方案研究

简单介绍了船用海水淡化装置的种类和应用,并提出了一种新的远洋船舶中海水淡化系统与中央空调系统联合运行的思路,并对此方案的可行性与前景进行了研究与分析。     

Progress in 3D Printing of Carbon Materials for Energy‐Related Applications

The additive‐manufacturing (AM) technique, known as three‐dimensional (3D) printing, has attracted much attention in industry and academia in recent years. 3D printing has been developed for a variety of applications. Printable inks are the most important component for 3D printing, and are related to the materials, the printing method, and the structures of the final 3D‐printed products. Carbon materials, due to their good chemical stability and versatile nanostructure, have been widely used in 3D printing for different applications. Good inks are mainly based on volatile solutions having carbon materials as fillers such as graphene oxide (GO), carbon nanotubes (CNT), carbon blacks, and solvent, as well as polymers and other additives. Studies of carbon materials in 3D printing, especially GO‐based materials, have been extensively reported for energy‐related applications. In these circumstances, understanding the very recent developments of 3D‐printed carbon materials and their extended applications to address energy‐related challenges and bring new concepts for material designs are becoming urgent and important. Here, recent developments in 3D printing of emerging devices for energy‐related applications are reviewed, including energy‐storage applications, electronic circuits, and thermal‐energy applications at high temperature. To close, a conclusion and outlook are provided, pointing out future designs and developments of 3D‐printing technology based on carbon materials for energy‐related applications and beyond.     

基于DBSCAN-FPN的输电线路螺栓缺销检测方法

螺栓作为输电线路上数量最大的紧固件,其缺陷检测是输电线路巡检工作中的一项重要内容.针对螺栓缺销为小目标,其定位困难、特征难提取的问题,提出一种基于DBSCAN算法与FPN模型相结合的螺栓缺销检测方法.首先,利用FPN模型定位螺栓缺销目标区域,同时基于DBSCAN聚类算法对具有相同形态结构的区域进行聚类;然后,改进FPN...     

三轴光电跟踪系统的实时引导

三轴光电跟踪系统是地平式和X-Y式光电跟踪系统的有机组合,可以全方位跟踪空间运动目标,跟踪系统测量值与空间位置的多对一特性决定了跟踪策略的多样性和系统引导的复杂性,跟踪过程中对系统进行实时引导可以提高系统的跟踪精度及其可靠性。各种跟踪策略下三轴光电跟踪系统的引导过程包括:地平式的引导、X-Y式的引导、具视轴偏角的地平式引导、三轴光电跟踪系统的引导等。通过理论分析,给出了各种情况下的引导方法。     

基于CATIA的可穿戴下肢康复外骨骼人类工效学研究

为改进和完善偏瘫患者处于穿戴下肢康复外骨骼期间的人机耦合舒适性,运用CATIA(computer aided three-dimensional interactive application)人类工效学模块对偏瘫患者的运动形态进行虚拟仿真,将外骨骼设备作为研究方向,着重进行整机系统中人、机关系的剖析,在此基础上应用人类工效学理论对康复外骨骼设备作出人机工学设计、人机校定和评估。经过仿真分析及人机评估系统的研究表明,应用该设计方法使下肢康复外骨骼的空间适配和人机系统更好地达到偏瘫患者舒适度需求的要求。