环保型水溶性带锈防锈涂料的研制

为省去除锈除油等表面预处理工序，以简化涂漆工艺，减轻劳动强度，降低涂装成果，采用改性脲醛树脂作为水溶性带锈涂料的成膜物与转化液的最佳配比，研制出一种环保型水溶性带锈防锈涂料，较好地解决了水溶性带锈涂料耐水性和装饰性差的问题。     

沟槽型织构表面对界面摩擦学行为的作用机制

在球-盘接触状态下,研究具有不同宽度的沟槽型织构表面对界面摩擦学特性的影响,并揭示沟槽型织构表面对界面摩擦学行为的作用机制。试验结果表明:沟槽型织构表面显著地改变界面的摩擦学行为,特定尺寸参数的沟槽型织构表面能有效改善界面的摩擦磨损特性;沟槽的存在改变摩擦界面的接触状态,从而引起界面的法向位移和法向力信号产生突变;具有合理尺寸参数的沟槽型织构表面,能充分捕获界面的磨屑,避免对摩试样之间产生强烈的撞击作用,从而有效地改善界面摩擦学行为。     

外墙涂料的耐候性测试方法研究

暴露在大气中的外墙涂料受紫外线一热，雨水及空气中降尘作用使其保护功能和装饰功能受到破坏，最终失去使用价值。本文根据重庆地区酸沉降危害严重的特点，研究了该地区所使用的外墙涂料耐候性的测试方法。     

无毒和低毒防污涂料的研究进展及存在问题

防污涂料作为一个有效解决海生物污损的方法,在船舶、海洋水下设施上得到广泛应用。随着环保意识的增强以及各种相关规定的制订,各国开始竞相研制开发新型无毒和低毒防污涂料。本文在介绍无毒和低毒防污剂、防污涂料的种类、研究现状、应用效果的基础上,论述了从防污剂的筛选到防污涂料实船实验的一系列研制过程以及研制过程中存在的问题,并对未来的发展方向进行了展望。     

家具喷涂机器人喷枪轨迹生成分析与研究

根据喷漆机器人自动轨迹生成系统的组成与结构,提出了针对家具喷涂的喷漆机器人喷枪轨迹的设计方案.该方案以使家具表面漆膜厚度差达到最小为设计目标,在喷枪方向及空间路径为已知和未知两种条件下,分别给出了沿指定空间路径和基于自由表面的喷枪最优轨迹的求解方法,以解决喷漆机器人喷枪最优轨迹的规划问题.     

浅谈改善不饱和聚酯涂料气干性的方法

叙述了不饱和聚酯涂料的成膜机理。列举了目前改善不饱和聚酯底漆干性的主要方法,如薄膜遮盖法、石蜡覆盖法、改变树脂中可共聚的单体、添加醋酸丁酸纤维素、在不饱和聚酯中引入气干性基团等。并对其利弊作了简要的分析。     

Estimation of image scale variations in monocular visual odometry systems

Reliable estimation of the vehicle position is the main prerequisite in all autonomous mobile robotic applications. Image‐scale uncertainty in correlation‐based monocular visual odometry systems negatively affects the accuracy of the vehicle motion estimation. This paper presents the development of a new technique and algorithm to estimate image‐scale variations due to camera height fluctuations when the vehicle is driven on uneven terrains or when the height of vehicle from ground changes as a result of changes in load or number of passengers in the vehicle. This technique depends on marking the image frames by two red laser points, as independent reference points, which have a certain distance between them. The image‐scale variations can be estimated by monitoring the variations in the distance between these two reference points. The proposed technique eliminates the need for camera recalibration and the use of sensors to measure the variations of camera height from ground, such as laser range finders and acceleration sensors. The developed system uses a single downward‐facing monocular camera supported by a lighting module and installed underneath the test vehicle to avoid the negative effect of directional sunlight and shadows, which can disturb the correlation. Indoor and outdoor experiments have proven the efficiency of the suggested technique in resolving image‐scale uncertainty and ensuring an image‐scale‐invariant correlation‐based matching, with only less than 5% additional computational time. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

Measurements and modeling of absorptive partitioning of volatile organic compounds to painted surfaces

Partitioning to surfaces is an important sink for volatile organic compounds (VOCs) indoors, but the mechanisms are not well understood or quantified. Here, a mass spectrometer was coupled to a portable surface reactor and a flow tube to measure partitioning of VOCs into paint films coated onto glass or wallboard, and their subsequent diffusion. A model was developed to extract values of the effective absorbing organic mass concentration of the film, C_w, which is a measure of absorption capacity, and VOC diffusion coefficients, D_f, from VOC time profiles measured during film passivation and depassivation. Values of C_w agreed well with the value estimated from the paint film mass and flow tube air volume, and D_f values (also measured using attenuated total reflectance-Fourier transform infrared spectroscopy) correlated well with VOC vapor saturation concentrations, C*, estimated using a group contribution method. The value of these relationships for estimating key parameters that control VOC partitioning into paint and the fate of VOCs indoors was demonstrated using a house model, which indicated that >50% of VOCs with C* ≤10⁸ μg/m³ (C* of octane, hexanone, and propanol) that contacted a paint film of typical thickness fully permeated the film regardless of emission duration.     

Acoustic properties of sound-absorbing polyester fabrics woven with thick staple and thin draw textured yarn for use in interior decoration

Environmental pollution in our daily life because of noise is an increasing public health concern. We designed and woven with staple- and draw-textured yarns, for sound absorbance purposes. For wefts and warps, two different thicknesses of the thick staple-yarn and thin draw-textured filament yarn were used. The prepared fabrics were classified in porous, medium, and dense, on the basis of their densities and air permeabilities, and the sound absorption coefficients of the fabrics were found to be linearly related to the air permeability. The sound absorption coefficient determined by the impedance tube method was higher for porous fabrics compared with that for dense fabrics in the high frequency region. By the reverberant field method, the sound absorption coefficients for all fabrics were highest in the low frequency region. Porous fabrics exhibited a shorter reverberation time and a higher sound absorption coefficient than dense fabrics owing to their good sound absorption property.