基于H-anim的数字化人机设计研究*

为实现数字化人机工程,引入数字化人体模型来统一表达人机测量尺度、肢体动作特征和作业空间范围等人机要素,并提出基于H-anim的数字化人体建模方法,结合VRML原型节点建立了三维的,具有真实感的人体尺寸模型,利用EAI技术仿真人体动作行为。最后,以机床为对象,构建了计算机辅助人机设计系统,实现了操作空间的可见性、可及性与宜人性人机评价。     

Measuring the exhaled breath of a manikin and human subjects

Due to scarcity of accurate information and available data of actual human breathing, this investigation focuses on characterizing the breathing dynamic process based on the measurement of healthy human subjects. The similarities and differences between one breathing thermal manikin and the human subjects, including geometry and breathing functions, were thoroughly studied. As expected, actual human breathing is more complicated than that of the manikin in terms of airflow fluctuations, individual differences, and exhaled flow directions. The simplification of manikin mouth structure could result in overestimated exhaled velocity and contaminant concentration. Furthermore, actual human breathing appears to be relatively stable and reproducible for an individual person in several conditions and is also accompanied by some uncertainties simultaneously. The averaged values are used to analyze the overall characteristics of actual human breathing. There are different characteristics of the exhaled breath between male and female subjects with or without wearing a nose clip. The experimental results obtained from the measurement of human subjects may be helpful for manikin specification or validation and accuracy assessment of CFD simulations.     

Simulation und Messung der thermischen Behaglichkeit

Vorgestellt wird ein Ansatz, der eine Bewertung der thermischen Behaglichkeit auch unter komplexen, inhomogenen raumklimatischen Verhältnissen unter Berücksichtung der menschlichen Physiologie zulässt. Dabei wird die Strömungssimulation an ein numerisches Modell (UC Berkeley Comfort Model), welches die Thermoregulation des menschlichen Körpers abbildet, gekoppelt. Mit Hilfe der Strömungssimulation können die klimatischen Bedingungen in Räumen detailliert ermittelt werden. Darauf basierend können durch das Thermoregulationsmodell die Temperaturverteilung im menschlichen Körper, die resultierende Wärmeabgabe an die Umgebung sowie die thermische Behaglichkeit bestimmt werden. Beispielhaft wird dieser Ansatz bei der Simulation der thermischen Behaglichkeit sowie des Empfindens bei einer Flächenkühlung angewendet. Simulation and measurement of thermal comfort. An approach is introduced, which enables the assessment of thermal comfort considering the complex and inhomogeneous climatic conditions in buildings as well as the human physiology. Computational fluid dynamic is linked with a numerical model representing the thermophysiological behavior of the human body (UC Berkeley Comfort Model). By dint of CFD, the climatic conditions in buildings are simulated with a detailed resolution. Basing on the simulations, the thermophysiological model is able to determine the temperature distribution of the human body, the heat flux to the environment as well as thermal comfort. The approach is used for the exemplified investigation of thermal comfort and sensation in a room equipped with a radiant cooling floor.     

The influence of virtual human model appearance on visual ergonomics posture evaluation

The objective of this study was to investigate whether the appearance of virtual human models influences observers when judging a working posture. A task in which a manikin is manually assembling a car battery was used in the experiment. In total, 16 different pictures were presented to the subjects. All pictures had the same background, but included a unique posture and manikin appearance combination. 24 subjects consisting of manufacturing managers, simulation engineers and ergonomists were asked to rate and rank the pictures. The results showed that the virtual human model appearance influenced subjects when they rated pictures one by one: a more realistic manikin was rated higher than the identical posture visualized with a less natural appearance. This appearance effect was not seen when subjects ranked the pictures while looking at all of them at the same time. The study demonstrates that the human modelling tool used when showing and visually evaluating results makes a difference. To minimize subjective effects, a combination of visualizations and objective ergonomic assessment methods is recommended.     

基于2003年标准数据的中国飞行员人体模型

首先介绍了CATIA 软件中的人体模型及其功能; 然后对软件中的加拿大、法国、韩国、日本人体数据进行了分析; 在此基础上就软件中建立新人体模型需要的人体数据与2003 年测量得到的中国飞行员的人体数据做了比较; 最后对中国飞行员人体数据做了选择和补充, 同时在CATIA 平台上建立了中国飞行员人体模型。该模型可以满足主机厂所在初步总体阶段的工效分析、评价工作。     

Comparison of visibility measurement techniques for forklift truck design factors

This study applied the light bulb shadow test, a manikin vision assessment test, and an individual test to a forklift truck to identify forklift truck design factors influencing visibility. The light bulb shadow test followed the standard of ISO/DIS 13564-1 for traveling and maneuvering tests with four test paths (Test Nos. 1, 3, 4, and 6). Digital human and forklift truck models were developed for the manikin vision assessment test with CATIA V5R13 human modeling solutions. Six participants performed the individual tests. Both employed similar parameters to the light bulb shadow test. The individual test had better visibility with fewer numbers and a greater distribution of the shadowed grids than the other two tests due to eye movement and anthropometric differences. The design factors of load backrest extension, lift chain, hose, dashboard, and steering wheel should be the first factors considered to improve visibility, especially when a forklift truck mainly performs a forward traveling task in an open area.     

Emotional responses towards food packaging: A joint application of self-report and physiological measures of emotion

In this paper we investigate consumers’ emotional responses to food packaging. More specifically, we use self-report and physiological measures to jointly assess emotional responses to three typical food packaging elements: colours (low-wavelength vs. high-wavelength), images (positive vs. negative) and typefaces (simple vs. ornate). A sample of 120 participants was exposed to mock package design concepts of chocolate blocks. The results suggest that images generate an emotional response that can be measured by both self-report and physiological measures, whereas colours and typefaces generate emotional response that can only be measured by self-report measures. We propose that a joint application of self-report and physiological measures can lead to richer information and wider interpretation of consumer emotional responses to food packaging elements than using either measure alone.     

基于行为分析的叉车驾驶室造型设计研究

目的 现有的车辆人机分析过程,多以车辆本体为研究对象,驾驶员被动匹配,忽略了以用户为中心的设计原则。基于驾驶员主动驾驶行为的研究,可以系统地进行人机工程学分析,为叉车驾驶室造型设计提供有效的指导。方法 首先分析驾驶员行为与叉车造型的映射关系,通过任务分析法和动素分析法,研究叉车驾驶员的上车行为与驾驶行为,提取关键动作及序列;依据ECRS原则进行行为优化,关联归纳现有叉车造型存在的问题,为创新设计提供目标方向。结果 依据分析结果对叉车驾驶室进行了创新方案的设计,并通过Proe软件的Manikin模块,验证了创新设计方案的可用性。结论 最后总结出了基于驾驶行为分析的工程车辆驾驶室的造型设计流程,为现有工程车辆驾驶室的造型设计提供了系统性指导。     

用于车身总布置的三维参数化人体模型

使用UG三维软件及其相关性驱动技术,建立了三维参数化人体模型,并给出了设计应用实例.使用表明人体模型完全可以满足在三维环境下进行车身总布置设计的需要.     

Assessment of thermal environment using a thermal manikin in a field environment chamber served by displacement ventilation system

This paper presents a thermal comfort study using a thermal manikin in a field environment chamber served by the Displacement Ventilation (DV) system. The manikin has a female body with 26 individually heated and controlled body segments. The manikin together with subjects was exposed to 3 levels of vertical air temperature gradients, nominally 1, 3 & 5 K/m, between 0.1 and 1.1 m heights at 3 room air temperatures of 20, 23 and 26 °C at 0.6 m height. Relative humidity at 0.6 m height and air velocity near the manikin and the subjects were maintained at 50% and less than 0.2 m/s, respectively. The aims of this study are to assess thermally non-uniform environment served by DV system using the manikin and correlate the subjective responses with measurements from the manikin. The main findings indicate that room air temperature had greater influence on overall and local thermal sensations and comfort than temperature gradient. Local thermal discomfort decreased with increase of room air temperature at overall thermally neutral state. The local discomfort was affected by overall thermal sensation and was lower at overall thermally neutral state than at overall cold and cool sensations.