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针对人的工作特点与休闲要求的功能转换进行的座椅设计,展现了一种新的人机互动关系,新型的结构形式。根据坐姿的生理形态和体压分布,对座椅的设计采用了人机工程学的方法进行分析,提出更符合人体生态曲线的座椅结构尺寸,以提高乘座的舒适性,适应人体的健康需要。设计适用对象:在电脑前长时间工作的设计总监或打字秘书。设计使用场合:电子办公工作室。 相似文献
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人们的很多生产生活活动是在坐姿下完成的,因此研究坐姿舒适度有很重要的意义。坐姿舒适度在座椅的设计中扮演着越来越重要的角色,而对座椅舒适度的研究也逐渐偏重对坐姿舒适度的评价。人性化座椅的设计必须满足舒适度高的要求,以达到人体舒适坐姿的需求。针对坐姿舒适度评价,采用经典的光学动作捕捉技术和问卷调查相结合的方法对坐姿舒适度进行科学评价。实验选用美国Motion Analysis光学动作捕捉系统,设置11个Eagle数字捕捉镜头,用EVaRT软件获取了40名志愿者人体关键点在空间中的点位数据,采用PCA主成分分析提取特征点的方法提取关键点,用MATLAB软件自主编程对关键点数据进行处理和计算,比较测试者坐在2种不同座椅上的关节角度和力矩数据差异。统计结果表明,志愿者采用不同的姿势坐在不同的座椅上时,躯干、大腿、膝盖部位的角度和力矩数据差异较为明显。结合人机工程理论,利用这些数据差异对坐姿进行分析,为座椅设计提供理论依据。这种人机工程学理论分析评价和问卷调查相结合的方法,为座椅的舒适度评价提供了有效的依据。 相似文献
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目的根据办公桌椅的尺寸与人体尺寸特征,结合座椅不同高度的体压分布状态,探讨办公家具桌椅设计与人体形态相对应的规律。方法体压分布实验采用tekscan设备,并对压力分布数据进行采集处理,共选20名被试者,分别对一款办公椅的两种坐姿状态进行实验,并结合面部表情分析软件进行比对分析。结果实验统计得出两种坐姿的一面接触面积,平均压强、峰值、压强等值,以及两种坐姿下,操作不同任务时的面部表情数据进行分析,显示出不同坐姿下人们的办公舒适度及效率是不同的。结论办公桌椅的尺寸对人们的办公舒适度及效率有着至关重要的影响。 相似文献
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座椅作为人类日常生活中使用最广泛的支撑类家具产品,其体验舒适度直接关联着人们日常生活的质量。因此,座椅舒适度的评估是合理设计以及改良座椅设计的基础。本文首先对山姆·马洛夫椅的舒适性进行了概括性介绍,继而在“工匠意”的设计理念下,以人因工程学角度与实际体验感评估相结合的方法,从用户体验感的角度对山姆·马洛夫椅的座椅高度、座椅深度、扶手高度、靠背和座椅倾斜度进行了辅助评估,从而提出了关于舒适坐姿动态系统的几点建议,旨在为基于用户舒适性的座椅日常改良与创新设计提供参考。 相似文献
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目的 针对近年来儿童乘坐电动自行车频发伤亡事故的现状,研究现有电动车儿童安全座椅不合理的人机关系;从安全性、易用性的角度出发,为儿童安全座椅提供设计依据。方法 采用人机工程学理论,综合分析了儿童安全座椅的人机工程学因素;运用产品设计中人体尺寸的应用原则,对儿童安全座椅进行了安全、合理的人机尺寸设计;使用调查法对儿童安全座椅的使用场景与使用方式进行了调研,得出了儿童安全座椅须符合人机工程学的功能与结构设计要求;依据儿童的生理和心理特征,对造型要素进行了分析。结果 从可调节性、便携性、安全性等方面展开了研究,得出了儿童安全座椅的合理尺寸与结构设计要求,基于儿童的心理与生理特征,得出了安全座椅的造型设计要求。结论 以踏板电动车为例,进行儿童安全座椅的创新设计实践,实现以人为中心,安全、舒适、便携的人机关系。 相似文献
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《International journal for numerical methods in engineering》2018,113(9):1488-1506
In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method. 相似文献
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Standards are the basis for production enterprises to organize production ex-factory inspection trade 《中国标准化(英文版)》2008,25(1):24-25
Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.…… 相似文献
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A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa. 相似文献
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On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.…… 相似文献
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Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß. 相似文献
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C. Qihong W. Zhan‐Wen J. Yi J. Yehua L. Fei F. Hanguang 《Materialwissenschaft und Werkstofftechnik》2014,45(7):582-590
In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M2(B,C), (W,Mo)2(B,C), M3(B,C), M23(B,C)6 type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm2. The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K1 mill housing of bar mill. 相似文献
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Dimiter Hadjistamov 《材料科学与工程:中英文B版...》2019,(2):56-65
The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ... 相似文献
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Kyo-Hong CHOI Kwon-Koo CHO Gyu-Bong CHO Hyo-Jun AHN Ki-Won KIM Yoo-Young KIM 《材料科学与工程学报》2007,25(6):886-891
Several researches have been reported about the characteristic of β-Ga2O3 nanowires which was synthesized on nickel oxide particle. But indeed, recent researches about synthesis of β-Ga2O3 nanowires on oxide-assisted transition metal are limited to nickel or cobalt oxide catalyst. In this work, Gallium oxide (β-Ga2O3 ) nanowires were synthesized by a simple thermal evaporation method from gallium powder in the range of 700 - 1000℃ using the iron, nickel, copper, cobalt and zinc oxide as a catalyst, respectively. The β-Ga2O3 nanowires with single crystalline without defects were successfully synthesized at the reaction temperature of 850, 900 and 950℃ in all the catalysts. But optimum experimental condition in synthesis of nanowires varied with the kind of catalyst. As increasing synthesis temperature,the morphology of gallium oxide nanowires changed from nanowires to nanorods, and its diameter increased. From these results, we could be proposed that the growth mechanism of β-Ga2O3 nanowires was changed with synthesis temperature of nanowires. Microstructure and morphology of Synthesized nanowire was characterized by HR-TEM, FE-SEM, EDX and XRD. 相似文献
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《中国标准化(英文版)》2014,(4)
正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from 相似文献