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安全阀阀瓣膜传感器标定的理论与实验研究 总被引:3,自引:1,他引:2
通过对安全阀阀瓣膜传感器进行ANSYS数值模拟和相关实验研究,从理论和实验两方面探索了对阀瓣膜传感器进行标定问题,经过实验验证后,提出了一种准确可行的标定方案.首先,采用ANSYS软件模拟了阀瓣膜传感器承受不同载荷下的应变与压力的关系;同时也设计了一套阀瓣膜传感器的标定实验装置,利用该实验装置对阀瓣膜传感器进行了标定实验.标定实验结果分析表明,阀瓣在承受不同载荷的情况下,应变与压力呈良好的线性关系,线性度达到99.9%,并与相同载荷情况下ANSYS分析结果完全吻合,从而验证了这一标定实验方案的可靠性;通过对阀瓣膜传感器的灵敏度、线性度、重复性、滞后性等指标进行分析,结果显示其参数满足一般传感器的标准,验证了该传感器的可行性. 相似文献
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基于PVDF传感器的阶梯梁实验模态分析 总被引:1,自引:0,他引:1
以两端固定阶梯梁为例,采用多点激励、单点测量方法通过矩形聚偏氟乙烯( PVDF)压电薄膜传感器进行实验模态分析,并与数值计算结果和小质量加速度计实验结果进行对比。理论计算和实验表明:PVDF传感器可以代替传统的加速度计进行实验模态分析,对阶梯梁模态分析效果很好,并且PVDF传感器具有连续分布式、质量轻、频响宽、价格相对低廉等优点。 相似文献
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利用分离式电磁耦合效应设计了一台位移传感器。基于电磁耦合机构的磁路分析,讨论了所设计位移传感器的工作特性。设计了对该传感器实验装置并进行了实验研究,得到了传感器的位移定标曲线和不同位移(空气间隙)范围下的传感器工作性能曲线。实验结果与理论分析基本吻合。 相似文献
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一种红外传感器阵列探测方法的研究 总被引:2,自引:2,他引:0
根据热释电红外传感器的工作原理和特性,设计了一种红外传感器信号的采集探测实验方法。由于敏感元件在传感器阵列的四面,故设计圆周运动的探测方法。实验结果证明:本探测方法与采集系统采集红外信号良好,实验方法具有重要实用价值。 相似文献
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本文介绍利用石英谐振器研制压力传感器。对该传感器的工作原理、结构及室内实验结果进行了详细的描述。该传感器已成功用于油田井下压力测量仪器,测量精度达0.05%。 相似文献
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对机器人腕力传感器动态负载效应的探讨 总被引:3,自引:0,他引:3
本文通过理论分析和实验分析,探讨负载对机器人腕力传感器动态性能的影响.负载使腕力传感器的固有频率降低,使传感器的阻尼比增大.理论分析与实验分析的结果一致. 相似文献
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In wireless sensor network applications where data gathered by different sensor nodes is correlated, not all sensor nodes need to be active for the wireless sensor network to be functional. Given that the sensor nodes that are selected as active form a connected wireless network, the inactive sensor nodes can be turned off. Allowing some sensor nodes to be active and some sensor nodes inactive interchangably during the lifecycle of the application helps the wireless sensor network to have a longer lifetime. The problem of determining a set of active sensor nodes in a correlated data environment for a fully operational wireless sensor network can be formulated as an instance of the connected correlation-dominating set problem. In this work, our contribution is twofold; we propose an effective and runtime-efficient iterative improvement heuristic to solve the active sensor node determination problem, and a benefit function that aims to minimize the number of active sensor nodes while maximizing the residual energy levels of the selected active sensor nodes. Extensive simulations we performed show that the proposed approach achieves a good performance in terms of both network lifetime and runtime efficiency. 相似文献
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依据几何成像原理建立了对称式立体视觉传感器的参数模型,通过对此模型坐标测量误差及传感器各参数误差传递函数的分析,研究了立体视觉传感器结构参数及其误差传递规律对传感器综合测量精度的影响关系特性,分析了有效视场、坐标测量精度和传感器结构参数之间的关系,给出了立体视觉传感器结构参数的设计原则与方法步骤,对立体视觉传感器的结构进行了优化设计,对比了传统结构和新式结构的优缺点,并在文章最后介绍了实际应用以及达到的精度. 相似文献
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Sensor enabled grid may combine real time data about physical environment with vast computational resources derived from the grid architecture. One of the major challenges of designing a sensor enabled grid is how to efficiently schedule sensor resource to user jobs across the collection of sensor resources. The paper presents an agent based scheme for assigning sensor resources to appropriate sensor grid users on the basis of negotiation results among agents. The proposed model consists of two types of agents: the sensor resource agents that represent the economic interests of the underlying sensor resource providers of the sensor grid and the sensor user agents that represent the interests of grid user application using the grid to achieve goals. Interactions between the two agent types are mediated by means of market mechanisms. We model sensor allocation problems by introducing the sensor utility function. The goal is to find a sensor resource allocation that maximizes the total profit. This paper proposes a distributed optimal sensor resource allocation algorithm. The performance evaluation of proposed algorithm is evaluated and compared with other resource allocation algorithms for sensor grid. The paper also gives the application example of proposed approach. 相似文献
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A sensor deployment approach using glowworm swarm optimization algorithm in wireless sensor networks
A wireless sensor network is composed of a large number of sensor nodes that are densely deployed in a sensing environment. The effectiveness of the wireless sensor networks depends to a large extent on the coverage provided by the sensor deployment scheme. In this paper, we present a sensor deployment scheme based on glowworm swarm optimization (GSO) to enhance the coverage after an initial random deployment of the sensors. Each sensor node is considered as individual glowworms emitting a luminant substance called luciferin and the intensity of the luciferin is dependent on the distance between the sensor node and its neighboring sensors. A sensor node is attracted towards its neighbors having lower intensity of luciferin and decides to move towards one of them. In this way, the coverage of the sensing field is maximized as the sensor nodes tend to move towards the region having lower sensor density. Simulation results show that our GSO-based sensor deployment approach can provide high coverage with limited movement of the sensor nodes. 相似文献
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随着无线传感网络技术的研究逐渐深入,对于无线传感网络仿真平台的需求也受到越来越多的重视.为了更加方便有效地进行无线传感网络上的算法研究,设计实现了一种无线传感网络仿真平台SnSim (Sensor Network Simulator).针对目前无线传感网络的发展情况,结合无线传感网络的特点,采用目前流行的Eclipse RCP面向对象框架,设计了无线传感网络仿真平台的数学模型、体系结构、功能模块、平台语言.实现了无线传感网络仿真平台,并对其性能及有效性进行了科学评估. 相似文献
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针对现代信息技术对传感器稳定性、灵敏性及精确度要求日益提高,以及日益复杂电磁环境下传感器面临的电磁兼容性问题,论述传感器电磁兼容性内涵及特点,指出目前开展传感器电磁兼容性研究工作重要性,从传感器电磁抗干扰技术、PCB电磁兼容技术及传感器电磁兼容预估技术三个方面介绍国内外传感器电磁兼容性研究进展,最后对传感器电磁兼容性研究提出一些建议。 相似文献