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针对远程家庭健康监护所具有的综合性强、需求变化快、功能要求灵活的应用特点,设计了一种支持动态重构的远程家庭健康系统。该系统首先在面向服务架构(SOA)基础上实现了一种远程服务流程定义架构,可以由医生自己定义服务的内容和服务的形式,并在远程家庭健康监控仪器上采用面向方面(AOP)技术动态组装操作流程和可视化界面。两者相结合,使得家庭远程健康监护系统中软件功能模块具备了动态演化和动态组装能力,为医生的健康管理提供了极大的灵活性。软件临床应用结果表明,医生可以针对病人进行个性化的健康方案定制。 相似文献
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声呐收放装置是声呐系统的关键部件,其工作状态对整个系统的运行稳定性和安全性有着重要影响,但是收放装置本身不具备完善的检测评价功能。亟须解决收放装置状态检测、收放装置系统性能评价和系统故障预测等问题。提出了一种基于专家判断法与相关性分析法的指标体系方法的机电检测评价系统。该系统通过传感器、信息注入等方式获取装备中被检测对象的信息,经过信号的处理及分析,得到被测对象的检测结果,将检测结果发送至可视化系统内,显示装备健康状态及预判潜在问题,以确保设备的安全性和可靠性。研究内容及成果包括:(1)研究了频谱分析法、特征提取法、统计分析法在设备检测评价分析中的具体应用,针对不同传感信号选取相应的分析方法;(2)检测评价系统具体实现涉及的功能模块及主要作用的研究,提出了信号转接注入、多功能信息追踪等特色功能;(3)检测指标的权重设计,着重对专家判断法和相关性分析法进行介绍及研究。初步构建了一个集多种数据分析方法并且考虑指标选取和指标权重设计的机电设备检测系统,对于类似机电设备检测系统的设计具有一定的参考意义。 相似文献
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传统无损检测技术不能满足机械设备状态监测的需求,无损云检测技术是状态监测领域的未来发展趋势,也是设备健康管理基于大数据的必然需求。首先,归纳总结了无损检测和云检测的含义,基于此定义并分析了无损云检测的概念,明确无损云检测的四大优势;其次,阐明无损云检测的三个发展阶段,依据功能要求构建出数据流程和系统架构;最后,从仪器、系统两个层面分别进行设计开发和工程应用,通过对无损云检测仪器和系统架构的设计分析,研制声发射云检测仪器设备、搭建大型游乐设施健康监测和管理云平台。实现设备监测、故障诊断、结果可视化等动态管理功能,较好实现无损云检测的综合应用,从云检测角度提供大型游乐设施综合管理新的解决方案,为后续智能检测的研究提供参考并奠定基础。 相似文献
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通过对MRS-2型一体化智能型固体内耗仪机械系统中倒扭摆的精度分析,从理论上揭示了固体内耗仪诸多系统中机械系统是内耗测量中的根本和核心所在,其精度是决定整个内耗仪内耗测量精度的关键,同时提出了应用激光二维扫描传感器实时检测与提高内耗仪机械系统精度的方法,填补了该领域的研究空白,具有一定的工程应用价值。 相似文献
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提出了一种基于射频信号的非接触式血压检测方法,设计了血压检测系统并进行了数据的测试及分析。主要针对传统袖带式血压计对于特殊人群使用不方便以及现有血压检测主流方法中光信号易受干扰、测量不准确、需要跟身体接触等问题进行了方法探究。系统发射射频信号到身体上的待检测点,然后采集反射回来的信号,由多普勒效应原理可以得到脉搏波传导的波形图,并计算脉搏波传导时间,代入血压计算模型中,得到血压值,从而实现非接触式连续检测、监测。实验结果证明,该装置可以实现对血压的非接触式连续检测和监测,为便携式可穿戴式血压测量及实时监测设备提供了可参考的实施方法。 相似文献
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为了获得更加准确的中医理疗功效检测结果,根据中医经络的气血和人体皮肤微循环密切相关的理论,提出了一种基于散斑血流成像的检测方法。对检测过程中由于被测对象身体抖动等因素产生的图像信噪比下降问题进行研究和改进,并通过软管模拟实验对成像系统的稳定性进行验证。然后,对10名健康志愿者的内关穴或外关穴进行艾灸实验,以血流灌注指数为检测指标,采用散斑血流成像系统对手部不同经络的穴位及非穴位检测点进行检测。实验结果表明:艾灸后,在艾灸点所在经络上的穴位检测到的血流灌注指数增加比其它穴位点高20%。激光散斑血流成像系统能够对理疗过程中皮肤血流变化予以大视角的成像,此方法在中医理疗功效检测中具有有效性。 相似文献
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The authors have developed a new x-ray imaging system for quantitative arterial imaging and blood flow measurements. The system is based on the scanned projection technique and employs an x-ray beam collimated into a fan of radiation and an x-ray image intensifier optically coupled to a 1024-element linear photo-diode detector array. The system has two modes of operation: quantitative projection imaging and blood flow measurements. In the first mode of operation, low-noise, quantitative images are obtained by irradiating small regions of interest to minimize the detection of scattered radiation and intensifier tube veiling glare. System performance is optimized by making use of the large dynamic range (8,000:1) and response linearity of the solid-state photo-detector. In the second mode of operation, flow information is obtained by detecting the passage of a small bolus of iodine contrast agent. 相似文献
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P N Wells 《Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine》1990,204(1):1-20
Ultrasonic pulse-echo systems can provide range-finding, time-position and real-time two-dimensional images of soft-tissue structures within the body. The Doppler effect can be used to study motion and blood flow. Continuous wave Doppler instruments provide information about velocity and direction of flow; depth discrimination can be obtained by pulsing the ultrasound. Two-dimensional Doppler flow imaging can be achieved by manual scanning of a probe over the skin surface. The combination of real-time pulse-echo imaging with pulsed Doppler blood flow detection in the duplex scanner makes it possible to localize the anatomical position of the Doppler sample volume. Real-time Doppler colour flow imaging combines traditional ultrasonic scanning with a two-dimensional flow map. Using appropriate ultrasonic instruments, blood flow volume rates, blood flow velocity profiles, pressure gradients, orifice areas, flow disturbances, jets, characteristics of blood vessels and the circulatory system, and tissue perfusion can all be investigated. These investigations have clinical applications in the study of cardiac, cerebral and peripheral blood flow, blood flow in the female pelvis, the fetus, the abdomen, the neonate, and in malignant tumours. Contemporary ultrasonic diagnosis employs exposure levels that are apparently free from biological risk, but other factors need to be taken into account in considering the prudent use of ultrasonic methods. Promising research is being carried out into the mechanism of ultrasonic scattering by blood, Doppler speckle, time-domain processing for blood flow imaging, methods for increasing the scanning speed, Doppler flow microscopy and contrast agents. The new technology that will result from this research should lead to further substantial progress in ultrasonic blood flow studies. 相似文献
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Sehyun Shin Ju Hee Jang Myung Soo Park Yunhee Ku Jang-Soo Suh 《Journal of Mechanical Science and Technology》2005,19(3):887-893
The aggregability of red blood cells (RBCs) was determined by laser backscattering light analysis in a microfluidic channel
Available techniques for RBC aggregation often adopt a rotational Couette-flow using a bob-and-cup system for disaggregating
RBCs, which causes the system to be complex and expensive A disposable microfluidic channel and vibration generating mechanism
were used in the proposed new detection system for RBC aggregation Prior to measurement, RBC aggregates in a blood sample
were completely disaggregated by the application of vibration-induced shear With the present apparatus, the aggregation indexes
of RBCs can be measured easily with small quantities of a blood sample The measurements with the present aggregometer were
compared with those of LORCA and the results showed a strong correlation between them The aggregability of the defibrinogenated
blood RBCs is markedly lower than that of the normal RBCs The noble feature of this design is the vibration-induced disaggregation
mechanism, which can incorporate the disposable element that holds the blood sample 相似文献
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电气设备在长时间运行中,由于绝缘材料的老化、破损等情况会引起局部放电现象。这种电气设备内部不易被发现的故障可能会加速设备的损坏,甚至会造成严重的事故。为了实现电气设备内部的故障检查,针对电气设备特殊的内部环境,将紫外放电检测和视频内窥技术相结合,研制了具有紫外放电检测和图像采集功能的紫外内窥检测系统。文中详细介绍了紫外脉冲放电信号的检测原理,检测系统硬件平台的构建,嵌入式Linux操作系统和Qtopia文件系统的启动与运行,USB摄像头的视频图像采集,并给出了该新型电气设备内窥系统的应用程序流程图,最后通过实验验证了该紫外内窥系统在电力设备检测方面的实用性。 相似文献
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针对目前同类产品存在操作复杂、性价比低和适应性差等缺点,该文设计了一种便携式肌电诱发检测仪,该检测仪采用低功耗高性能的S3C2440为主处理器,自行设计表面肌电信号检测模块,能实时地进行肌电图的采集、显示和存储.通过实际使用证明,该仪器具有功能齐全、功耗低、使用简单、价格低、携带方便和适用场合广泛等特点. 相似文献