共查询到19条相似文献,搜索用时 203 毫秒
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发动机尾气排放出的热量较多,占发动机燃料能量的35%左右,为提升系统的能量利用率,使用这部分热量对通入等离子体辅助氨燃烧裂解器的裂解支路中的氨气进行预热。采用常规的设计方法,根据设计要求,进行了尾气余热利用换热器的设计,通过该换热器将尾气余热传递给氨气使其在进入裂解器前能吸热升温到一定温度,从而减少等离子体辅助氨燃烧裂解器氨燃烧支路的氨气消耗量。通过能耗计算分析,该尾气余热换热器的投入使用,能回收利用尾气中的能量5.8kW,相当于减少燃烧的氨气量1.12kg/h,也即相当于每小时节省等离子体能量输出2.63MJ。 相似文献
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设计并开发了一款基于压力传感器的电梯安全间隙测量仪器。该仪器采用IC芯片对2个薄膜压力传感器的信号进行采集和处理,得到的测量结果直接显示在微型显示器上,实现电梯安全间隙的测量。该仪器的测量精度高,消除人工观察等带来的测量误差,克服了传统检测手段的不足,提高检测人员的工作效率,降低劳动强度。 相似文献
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为了解决传统超声波裂解仪器裂解效率低、交叉污染风险高的问题,开发了多模联振式超声波裂解系统。通过仿真分析,发现球冠结构传振膜的前十阶振动模态的固有频率具有台阶式分布的规律,这为利用传振膜多阶模态的联合共振提供了可能。基于ANSYS模态分析,分别研究了曲率半径、厚度和预载力对传振膜多阶振动模态联合共振特性的影响,并对传振膜的结构参数和预载力进行了优化设计。据此加工制作传振膜,搭建多模联振式超声波裂解实验平台,并验证其裂解效能。生物实验结果显示,本文所设计的多模联振式超声波裂解系统的裂解率高于传统超声波裂解仪器。 相似文献
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介绍了一种基于电泳芯片的微型、高效生化分析仪器,利用该仪器进行了基本的电泳进样、分离实验。仪器采用阻抗检测方法对多次生物化学试样的电泳分离结果进行分析,采用比例测量法大幅提高了仪器的测量精度,模块化的设计使该仪器易于扩展。 相似文献
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利用LabVIEW图形化开发环境和数据采集卡,开发了基于计算机的电子测量仪器平台.介绍了虚拟仪器平台的组成,完成了信号源、示波器、电子计数器、电压表等7种常见仪器的设计,并且使用虚拟仪器平台对实际电路进行了测试.结果表明,该仪器平台可以替代实际电子测量仪器,为电子工程师的工程设计和产品研发提供了低成本的解决方案. 相似文献
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为适应蔬菜大棚的大规模发展,解决农业污染,提出一种混合动力控制方法及用于微型自耕机的混合动力装置,具有操作方便、体积小、零排放的优点.分析了该设计的技术难点和解决方案;通过Simulin软件,开发氢燃料-锂离子电池混合动力系统仿真平台和分析微型自耕机的3种工作状态;运用计算机设计软件Solidworks,对微型自耕机的各个零部件进行了三维建模并进行装配;其核心零件动力制器采用凹凸方式设计.样机测试证明,微型自耕机的各项性能指标均已达到国际标准要求,整机质量为40 kg,操作灵活、转移方便、制造成本较低. 相似文献
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英国 Neotronics 公司两年前曾发展了一种燃料效率监测器。该仪器能快速指示出烟道测点的氧量、温差和燃烧效率(本刊1981年第3期已作介绍)。仪器自问世以来较为畅销。现在该公司在此仪器基础上又发展了一种新型携带式燃烧分析器,称为携带式燃烧最佳化器,专门设计用于锅炉或加热炉,可提供烟道氧、一氧化碳和烟气温差的实时连续显示,并能自动校准和显示出设备的燃烧效率。这样可使操作人员对燃烧状态进行快速精确地全面研究。 相似文献
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ABSTRACT Modification of a solution calorimeter for use in thermometric titrations is described. Results of typical titrations are used to establish precision and accuracy. The instrument, which can be put together at moderate cost, is readily converted back to a solution calorimeter. 相似文献
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为了对所设计的导弹地面电缆自动化绝缘电阻测试仪的测量结果进行科学评价,简单介绍了绝缘电阻测试仪的硬件设计,详细介绍了采样电路的设计,分析了影响所设计的绝缘电阻测试仪不确定度的各个因素,以及每个因素给仪器测量不确定度带来的影响,列出了所设计的绝缘电阻测试仪的标准不确定度一览表,为科学评价所设计的绝缘电阻测试仪的性能提供了依据. 相似文献
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Dhuna M Beezer AE Morris AC Gaisford S O'Neill MA Hadgraft J Connor JA Clapham D Frost J 《The Review of scientific instruments》2007,78(2):025105
Assessing photostability (particularly of pharmaceuticals) is of growing importance, but hampered by a lack of reliable, rapid experimental testing protocols and instrumentation. In particular, most approaches require irradiation of the sample separately from the analytical measurement, which increases both experimental complexity and the number of assumptions that must be made when calculating stability. One technique that may obviate this is photocalorimetry, principally because the reporter of change (heat) is measured directly as a sample is irradiated. Although not a new idea, the design challenges of photocalorimeters are complex, primarily because light power is being introduced to the calorimeter which can thus both saturate the amplifiers and swamp the response of the sample. Careful instrument design is thus paramount. The aim of this work was to develop a robust, compact, and easy to use photocalorimeter with the immediate focus of developing photostability assays for pharmaceuticals. The final instrument design, arrived at through a series of iterative design modifications, is based on a twin differential heat-conduction principle and achieves an average base line deflection of -0.04+/-0.11 microW with light irradiating the sample cell. The performance capabilities of the instrument were demonstrated using a model system; the photodegradation of 2-nitrobenzaldehyde in solution. 相似文献
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ABSTRACT A submarine-type solution calorimeter has been built. The calorimeter can be used to measure the heats of solution of solid and gaseous compounds. The standard heats of solution of KC1 and LiC1 in water and heat of reaction of THAM with 0.1 N HC1 agree well (within 0.2%) with the literature values. 相似文献
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The design and manufacture of the main drift chamber(MDC) and the electro-magnetic calorimeter are most important issues in Beijing electron-positron collider upgraded projects. The whole mass of electro-magnetic calorimeter (EMC) in BESIII is 40t, thus high stiffness, strength and dynamical properties are required for the design of entire structural of electro-magnetic calorimeter. Based on numerical technique, the strength and the dynamical properties of EMC are analyzed, which provide theoretical reference for the design of entire structural of EMC. The MDC is composed of the elements with 28680 pre-stressed high-sensitive wires and during the assembly the wires are stringed layer by layer. The stretching forces of the wires vary continuously and couple with each other in the whole process. The modeling technique with high precision (especially "element birth and death") is carefully used to study the stress state during the process of assembly. So the variations of the stretching force of the wire are investigated, and several design schemes are evaluated and optimized. The research results have been adopted in the Beijing electron-positron collider's new project directly. 相似文献