Novel miniature integrated optical goniometers

A new principle and arrangement for directly determining the angle of incidence of an optical beam on an object are proposed and demonstrated. The novelty of the approach lies in the realization of a ‘smart object’, which extracts a portion of the incident beam's power into an optical waveguide attached to the object's surface or embedded in its body for converting the angle of incidence into the position of a guided beam with finite lateral extent. This ‘integrated optical light pointer’ beam is accomplished by means of creating additional degrees of freedom on the target in two different ways. While a first type is based on introducing spatial variations of the waveguide thickness, a second type makes use of a chirp of the grating periodicity. The feasibility for practical applications has been experimentally demonstrated by a direct comparison with a commercial high-resolution encoder, resulting in an r.m.s. error of <30′'. Measurements have been performed for chips fabricated based on replicated polycarbonate substrates and with no external optics, showing the great potential of this approach for realizing low-cost yet high-performance miniature goniometers.     

可调液力变矩器辅助调速电动铲运机性能匹配电算

介绍电动铲运机采用异步电动机与可调液力变矩器匹配的方案,通过加大速度可调范围,提高铲运机的动力性能和经济性能。     

LHD堵剂在渤海油田SZ36-1-C25hf井的应用

针对井下套管破损常致使地层流体窜槽,造成油井停产的情况,成功研制了一种新型LFID化学堵剂.该堵剂的活性剂与胶结固化材料快速反应形成具有纤维网架结构的水化物,能够承受较高的压差,并且微膨胀作用使封堵过渡层硬度和强度大大提高.LHD堵剂在SZ36-1-C25hf水平分支井应用成功,使日产油量高达200m3.该堵剂性能可靠...     

Measurement of the shape in the radioactive area by ultrasonic wave sensor

The HANARO (High-flux Advanced Neutron Application Reactor) has been operated since 1995. The Cold Neutron (CN) hole was implanted in the reflector tank from the design stage. Before a vacuum chamber and a moderator cell for the cold neutron source are installed into the CN hole, it is necessary to measure exactly the size of the inside diameter and thickness of the CN hole to prevent the interference problem. Due to inaccessibility and high radiation field in the CN hole, a mechanical measurement method is not permitted. The immersed ultrasonic technique is considered as the best way to measure the thickness and the diameter of the CN hole. The 4-Axis manipulator was designed and fabricated for locating the ultrasonic sensors. The transducer of an ultrasonic sensor having 10 MHz frequency leads to high resolution as much as 0.03mm. The inside diameter and thickness of 550 points of the CN hole were measured using 2 channel ultrasonic sensors. The results show that the thickness and inside diameter of the CN hole is in the range of 3.3 - 6.7mm and 0 156-165mm, respectively. This data will be a good reference for the design of the cold neutron source facility.     

Planar array stack design aided by rapid prototyping in development of air-breathing PEMFC

The polymer electrolyte membrane fuel cell (PEMFC) is one of the most important research topics in the new and clean energy area. The middle or high power PEMFCs can be applied to the transportation or the distributed power system. But for the small power application, it is needed to match the power requirement of the product generally. On the other hand, the direct methanol fuel cell (DMFC) is one of the most common type that researchers are interested in, but recently the miniature or the micro-PEMFCs attract more attention due to their advantages of high open circuit voltage and high power density.     

小型断路器接线端子温度特性的试验研究

小型断路器接线端子的温度作为表征断路器运行状态的重要参数,是实际运行中判断电气安全和火灾隐患的重要依据。本文通过小型断路器在不同运行工况下接线端子温度的实际测试,分析了负载率、接线端子拧紧力矩和断路器布置方式等因素对接线端子温度的影响,得到了接线端子内部温度和表面温度之间的差异关系。此外还对相同型号断路器之间的个体差异进行了对比分析,获得了一些重要结论。     

微型反应堆卸料装置设计及可靠性分析

微型反应堆（简称“微堆”）低浓化及退役都包含乏燃料卸出的操作,而保证乏燃料安全卸出的关键设备之一就是卸料装置。现有的卸料装置在操作过程中会破坏微堆堆筒体密封性,并且无法恢复,但微堆低浓化后还需利用原有堆筒体进行装料运行,所以本文在此需求的基础上设计了一套新型的卸料装置,可在不分离筒节、不破坏筒体完整性及密封性的前提下完成卸料操作。新设计的卸料装置包含卸料操作工具和辅助机械装置两部分。卸料操作工具通过小盖开口即可实现燃料组件的抓取,实施吊装。卸出的微堆乏燃料具有很高的放射性,卸料操作工具配合辅助机械装置,可实现远距离起升平移的操作,这种设计便于屏蔽,同时可有效降低工作人员所受辐射剂量。对该卸料装置进行计算和可靠性分析,结果表明其强度远大于实际使用载荷,安全可靠,能较好地满足微堆使用需求。新型微堆卸料装置具有经济性好、易制备、易操作的特点,下一步将在国内外微堆低浓化卸料或退役中推广应用。     

文化景观视角下的杭州西湖楹联匾额“壶天”特征研究

楹联匾额作为园林中表现“诗情”和意境的主要手段,其连接文化和景观的作用突出,是人文艺术的直接表现。在杭州西湖成为文化景观的背景下,西湖楹联匾额展示出文化与景观的统一性、中唐至两宋园林典型的“壶天”特征。首先梳理了西湖楹联匾额中残存古联的数量和空间分布;分析了楹联匾额作为文化和景观的“桥梁”在西湖景观中起到的构建作用。西湖楹联匾额作为西湖园林的一部分,受到“壶中天地”境界追求的影响以及南宋山水画对其诗意的深化。通过对西湖典型楹联匾额案例的整理研究,归纳出3方面“壶天”特征：以小见大、理及精微、文辞写意。并由此展现两宋园林文化在西湖文化景观中的遗留与影响。     

碘的微堆超热中子活化法测定

对碘的超热中子活化分析法进行了研究，利用该方法在微堆上测定了血液１食品及土壤中的碘含量，计算了该方法对全血及血清中碘的探测下限。     

中毒法测量微堆堆芯热中子绝对通量密度

微型中子源反应堆的反应性和中子通量密度有一定的关系。文章提出了用氙中毒法测量微堆堆芯热中子绝对通量密度对原理和测量条件进行了讨论该方法新颖，比活化法简单，不需要外加设备，满足工程对精度的要求。