共查询到19条相似文献,搜索用时 296 毫秒
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作为无损动态的一种检测方式,声发射技术不仅具有较高的检测灵敏度,而且还能够做到实时对被检测对象进行监控。在科技水平不断发展的今天,声发射技术已经被广泛应用到各个领域中,本文主要对在检测锅里压力容器过程中声发射技术的应用做出了简单介绍。 相似文献
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红外热成像测温技术在无机非金属材料工业中的应用 总被引:1,自引:0,他引:1
应用红外热成像测温技术,对几种陶瓷坯件在烧结过程中温度场的分布进行系统的测试和研究,首次揭示了陶瓷材料在不同温度下的动态温度场,利用计算机处理技术探讨了陶瓷坯体在烧结过程中变形与温度场的关系,并分析了红外热成像技术在无机非金属材料工业中的各种应用,包括动态温度场的测试,设备监控,故障诊断,无损检测,自动控制等。说明了红外热成像 技术在本行业中具有广阔的应用前景。 相似文献
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金继平 《化工标准.计量.质量》2012,(8):16-16
随着我国经济的飞速发展,大量的化工设备普遍使用,对于这些化工设备的在线监测越来越受到人们的重视。腐蚀作为设备使用最普遍的失效形式,其造成的失效占到所有设备失效总量的近三分之一,研究其在线检测方法就显得非常重要。声发射作为一种前沿动态无损检测手段,检验时,通过监测分析设备在使用过程中产生的声发射信号,进而对设备的使用状态进行综合评定,整个检测过程不需要设备停产,大大节省了检测成本,提高了检测效率,对于设备的长期监测特别适用。但在现场对设备进行长期声发射检测,我们发现,由缓慢的电化学腐蚀而产生的声讯号比较微弱,往往被湮没于"恶劣"的环境噪音之中,因此长期以来,声发射技术在金属结构腐蚀方面的应用一直很少有人涉及。本文将通过对比腐蚀信号和设备环境噪音信号,利用信号特征参数处理,波形分析,相关性分析等数据处理手段,对金属的腐蚀声发射信号进行综合分析,探索金属腐蚀长期监测及其安全评价方法。 相似文献
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金继平 《中国石油和化工标准与质量》2012,33(8):16
随着我国经济的飞速发展,大量的化工设备普遍使用,对于这些化工设备的在线监测越来越受到人们的重视。腐蚀作为设备使用最普遍的失效形式,其造成的失效占到所有设备失效总量的近三分之一,研究其在线检测方法就显得非常重要。声发射作为一种前沿动态无损检测手段,检验时,通过监测分析设备在使用过程中产生的声发射信号,进而对设备的使用状态进行综合评定,整个检测过程不需要设备停产,大大节省了检测成本,提高了检测效率,对于设备的长期监测特别适用。但在现场对设备进行长期声发射检测,我们发现,由缓慢的电化学腐蚀而产生的声讯号比较微弱,往往被湮没于"恶劣"的环境噪音之中,因此长期以来,声发射技术在金属结构腐蚀方面的应用一直很少有人涉及。本文将通过对比腐蚀信号和设备环境噪音信号,利用信号特征参数处理,波形分析,相关性分析等数据处理手段,对金属的腐蚀声发射信号进行综合分析,探索金属腐蚀长期监测及其安全评价方法。 相似文献
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雾化效果检测技术研究进展 总被引:1,自引:0,他引:1
韩国栋 《化工自动化及仪表》2010,37(6):1-4
综述了雾化效果检测技术的研究进展。重点介绍了闪光摄影法、高速摄影法、粒子成像测速技术、马尔文法和声波检测技术在雾化效果检测中的应用。指出声波检测方法在雾化效果检测,尤其是工业过程在线检测中具有广阔的应用前景。 相似文献
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唐建平 《中国石油和化工标准与质量》2018,(1):158-160
阀门是生产生活中通过管道对介质进行输送必不可少的装置,随着科技的发展对阀门检测技术要求也提高了,而作为新兴的一种在线动态声发射检测技术,相对其他检测技术在井控设备阀门中的应用有着很多优点。文章通过对声发射检测技术的原理及特征进行阐述,结合国内外声发射技术现状对声发射检测技术在井控设备阀门中的应用进行详细说明。 相似文献
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高压蓄能器的在用检验、检测过程中发现有大量的超标缺陷存在,根据实际情况采用先进的声发射检测技术对设备进行监控。未采用返修的传统方法,保留了部分缺陷,在确保设备安全运行的同时,又能满足生产的要求。 相似文献
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压力容器在制造、定期维修和长期使用过程中都需要进行检测以防止恶性事故发生,避免人身重大伤亡和设备财产重大损失。本文通过论述声发射技术检测的基本特点,总结了声发射技术在压力容器无损检测中的应用机制与应用程序。 相似文献
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《Ceramics International》2020,46(11):18948-18957
Carbon fiber-reinforced silicon carbide (C/SiC) composites are widely used in high-temperature thermo-structural applications. They are subjected to extreme loading conditions, such as random vibrations, which are likely to damage the structure. Structural micro-damage identification during vibration is very difficult, owing to the randomness of the environmental vibration and the complicated response it causes in structures. This study aims to determine a method for monitoring the damage properties of a C/SiC structure under a random vibration environment using acoustic emission (AE) technology. First, a pencil break experiment is conducted to verify the feasibility of the AE technology. Then, an AE monitoring experiment of the structural damage in a vibration environment is systematically conducted. Two types of experiments are designed for simulating the damage formation process inside the structure. In addition, the parameter characteristics of typical AE signals in the random vibration test are analyzed, and the relationships between the AE signal parameters and vibration loading are obtained. Lastly, the different stages of material damage development and damage types in each stage are provided to reveal the damage evolution processes of C/SiC composites. The results indicate that AE technology can be effectively applied to investigate the damage behaviors of C/SiC composites in random vibration environments. 相似文献
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Three-point-bend testing of a continuous unidirectional glass reinforced unsaturated polyester composite was chosen as a model to study the acoustic emission (AE) response and associated damage events in composite materials. Conventional three-point-bend samples were tested over a wide range of span-to-depth ratios, with failure modes established by post-failure scanning electron microscope (SEM) analysis. In addition, in-situ AE monitoring with simultaneous SEM recording was undertaken during three-point-bend testing inside an SEM vacuum chamber. These two test methods, using different equipment and sample geometry, were found to yield similar mechanical and AE results. The in-situ tests enabled the development of the various stages of damage to be observed while the AE response was simultaneously monitored. This enabled the AE signals to be unambiguously assigned to specific damage accumulation mechanisms. It was concluded that the AE amplitude distribution can be divided into three main ranges in this system: 60 to 65 dB, 75 to 85 dB, and larger than 90 dB corresponding to matrix damage, fiber-matrix debonding, and fiber breakage, respectively. It has been demonstrated that the coupling of AE monitoring with SEM recording of a composite system undergoing mechanical loading is a very powerful technique in the study of damage accumulation in advanced composite materials. 相似文献
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The mechanism of damage accumulation and failure in thin sheets of an orthotropic long discontinued glass fiber reinforced polypropylene composite was studied using optical and electron microscopy coupled with acoustic emission (AE) monitoring. The effect of strain rate (0.1 to 100 percent) was investigated, and a close correspondence was established between AE response and microscopic observations. Furthermore, simultaneous AE monitoring and optical microscopy performed during sample deformation substantiated the assignment of certain AE amplitude ranges with specific failure events in the composite. Specifically, the failure process was found to be very inhomogeneous in nature, and could be divided into three main stages of damage accumulation. Finally, cumulative AE energy curves were found to follow an interesting powerlaw behavior. Results based on the coupling of AE methods with optical and electron microscopy were found to be self consistent and in agreement with previous reports on thicker-section composites manufactured from the same materials. 相似文献
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一步法烷基糖苷的工业生产技术及进展 总被引:1,自引:0,他引:1
李庆晨 《精细与专用化学品》2010,18(2):24-27
综述了一步法APG的生产技术路线,指出了国内工业生产过程中存在的问题。从设备技术、工艺技术和监控技术3个主要方面总结了国内现有生产企业的改进措施,展示了国内一步法烷基糖苷工业生产技术的未来发展方向。 相似文献
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主循环冷却水系统腐蚀监测的重要意义,指出能够对设备作实时在线腐蚀监测的电化学以及计算机在腐蚀监控中的及循环冷却水系统腐蚀监测的2个主要发展方向,并搪塞了恒电量技术在这方面的应用前景。 相似文献
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运用HG8902系列数据采集仪对氯碱生产中运转设备的某一特征参数如振动、温度的状态进行监测,通过对所测数据的初步分析,得出设备故障诊断的建议。运用状态监测及故障诊断技术,可以方便、快捷、有效地把握设备运行状况,提高设备维修水平。 相似文献