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排序方式: 共有893条查询结果,搜索用时 15 毫秒
831.
某温湿高度试验箱低温-高度试验温度漂移原因分析与对策 总被引:2,自引:2,他引:0
目的针对某国产温湿高度试验箱,给出在低温-高度试验时,温度漂移的解决方法。方法在低温-高度试验时,对温度漂移原因进行研究分析,找出温度漂移的原因,给出了利用箱体微电脑触摸屏编程控制方法与设备控制参数设置的参考数据,找出了解决问题的简单方法。结果在低温(如-55℃)、低气压(如11.9 kPa)阶段,温度波动小于±3℃。结论通过设备控制参数重置,特别是通过一种拟合编程摸底试验,成功地解决了低温-高度试验时温度漂移问题。试验结果满足试验技术条件要求,并且节约了人力物力,为产品的交付使用赢得了时间。 相似文献
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装备环境适应性设计思想变革与实践 总被引:6,自引:5,他引:1
目的推行装备现代环境适应性设计思想,构建环境适应性设计技术与能力体系,提升装备环境适应性设计水平。方法通过对比传统与现代环境适应性设计思想的优缺点,阐明环境适应性设计思想变革的必要性,通过梳理、建设环境适应性设计技术与能力体系,并在装备研制过程中推广应用,促进现代环境适应性设计思想实践。结果工程设计分析与试验结果表明,高低温与振动工作极限指标提升20%~30%,基本可靠性提升57%,装备环境适应能力明显超出研制要求。结论现代环境适应性设计思想及其技术与能力体系在装备研制工作中将发挥巨大作用。 相似文献
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836.
近年来在居民生活中出现新的噪声污染,固定设备通过结构传播影响环境。通过对固定设备产生的低频噪声对居民的影响,论述了低频噪声传播方式、特点、对人体健康的危害,提醒有关职能部门应高度重视,采取有效的防护措施,确保居民生活在良好的声环境中。 相似文献
837.
Krzysztof Baszczyński Zygmunt Zrobek 《International journal of occupational safety and ergonomics》2013,19(3):313-331
Retractable type fall arresters are designed to protect against falls from a height of people who need freedom of vertical movement. The practice of fall protection shows that the devices are also used to protect people who work on flat roofs. This application creates quite different operating conditions for the devices. In some situations those conditions can be dangerous for users. The article presents a theoretical analysis of phenomena occurring during a fall arrest with retractable type fall arresters arranged horizontally. The analysis was verified with laboratory tests. The article presents a proposal for the construction of a test stand and a test method for estimating retractable type fall arresters intended for horizontal use. 相似文献
838.
Krzysztof Baszczyński 《International journal of occupational safety and ergonomics》2013,19(2):191-202
Retractable type fall arresters are very effective personal equipment protecting against falls from a height. These devices are used under different atmospheric conditions and in the presence of various types of industrial pollution. For this reason appropriate locking after conditioning simulating extreme conditions of a worksite is one of the essential characteristics of retractable type fall arresters. This article presents the requirements for locking of the devices. A previously used locking test method and its disadvantages are discussed. The article suggests an improved test method and test equipment. Measurement of the test mass acceleration is the most important improvement introduced into the test method. The article shows laboratory tests used to verify the method, which turned out to be a valuable source of information concerning the performance of retractable type fall arresters. 相似文献
839.
机载设备振动条件确定方法的研究 总被引:1,自引:0,他引:1
本文以机载显控台上的显示器为例,结合GJB 150A和GJB 4239的指导,介绍了在设计阶段和生产阶段上分别通过配重和设备的振动试验测量设备安装位置的响应,分析数据并确定机载设备振动试验条件的方法。 相似文献
840.
《International Journal of Sustainable Engineering》2013,6(4):261-277
Technological innovation and shorter product life cycles of electrical and electronic equipment coupled with their rapidly growing applications have resulted in the generation of an enormous amount of waste from electrical and electronic equipment (WEEE). To address the potential environmental problems that could stem from improper end‐of‐life management of WEEE, many countries have drafted national legislation to improve the reuse, remanufacture and material recycling from WEEE, and to reduce the amount of such waste going to landfills. With the introduction of such legislation comes an increased need for the recovery operators to evaluate the recycling costs and environmental benefits of reclaimed products and materials in order to select the most appropriate end‐of‐life options for individual products in WEEE. This paper presents a systematic methodology for ecological and economical assessment to provide a holistic understanding of the impacts associated with different end‐of‐life options for such waste. This assessment, in addition to providing decision‐support for the selection of the best possible end‐of‐life option for a particular product in WEEE, could also generate vital information to support the design and material selection processes during the initial product development activities. The assertion made is that the detailed considerations of the ecological and economical impacts associated with different end‐of‐life options will significantly improve the recovery and recycling of WEEE. 相似文献