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本设计利用LabVIEW软件对调节阀流量特性试验平台进行设计,采用PCI-1710HG多功能数据采集卡对调节阀位移信号、输出流量信号进行双路采集;对调节阀流量特性的修正和改变;实验过程的相关数据进行监测、记录、显示和保存等功能.利用LabVIEW软件进行实验平台设计可以用软件程序实现一些硬件仪器的功能,这样节约成本,外界环境对实验的干扰小,控制的效果明显. 相似文献
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构建了一种以光纤和光纤束作为系统信号传输通道的光纤倏逝波生物传感器系统,根据光纤探针的倏逝波理论和模式匹配理论对光纤探针进行了设计与制作,然后应用直接结合分析的方法对该传感器系统的探测性能进行了实验检测.实验针对光纤探针置于空气中和蒸馏水中两种情况进行,同时将系统检测到的信号通过数据采集卡采集到计算机中,并进行相关检测分析.对光纤探针置于空气中和蒸馏水中两种情况,系统分别获得了16.7和20.5的探测信噪比.实验结果表明,该相关检测方法能很好的区分系统的噪声信号和所探测的荧光信号,整个系统具有良好的可行性. 相似文献
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针对现有技术对微弱风力检测困难的问题,搭建基于微悬臂梁传感技术的微弱风力检测系统并实现微弱风力检测.传感器平台使用光纤耦合激光器作为光源,对微悬臂梁自由端进行照射.由微弱风力导致的微梁自由端的微小位移经过光杠杆原理放大,通过四象限探测器感光表面上的光斑相对位置实现对微弱风力的检测.利用编写的LabVIEW程序进行数据采集控制,并实时显示微悬臂梁偏转位移曲线.实验结果表明:微悬臂梁的偏转位移和风力具有较好的线性关系,系统3倍噪声对应的风力约为1.5×10-4N,风力检测结果的平均标准差为6.7 ×10-9N,实验数据具有较高重复性. 相似文献
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通过虚拟仪器的设计思想,基于LabVIEW开发平台构造频率响应的控制与数据采集测试系统;介绍了频率响应系统的设计构成,阐述了利用LabVIEW 7.1和NI-6251数据采集卡对频率响应系统控制和数据采集的实现,重点介绍了API函数的使用、及频率设定、波形采集及显示、数据处理并存储的编程方法和关键技术;系统实现了激励方波信号的持续输出、信号频率的自动化切换和数据记录存盘的频率响应全过程,并达到了采集数据的实时在线示波以及实验过程的监控. 相似文献
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主要描述了在三直线电机驱动的振动平台远程测控系统中利用LabVIEW中的PID Control Toolkit进行直线电机的控制,利用NI公司的PCI 6229数据采集卡进行电机编码器数字信号以及力传感器模拟信号的采集并输出电机的驱动信号,并通过DataSocket技术实现电机的远程控制和数据的远程传输. 相似文献
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本文介绍了一个利用虚拟仪器技术开发的轧制力在线智能监测系统。系统以PC工控机为主控平台,利用虚拟仪器开发软件LabVIEW7.1与使用PCI总线的高性能多通道数据采集卡相结合,实现对轧制力信号自动采集、判断、智能数据处理等功能。 相似文献
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针对现有落锤冲击试验系统无法低成本、高精度地获取冲击全过程中试样的力、位移等参数的技术难题,提出一种新型落锤冲击试验系统。该试验系统采用磁栅尺和动态力传感器直接精确测量被测试件的力与位移数据,通过电磁铁与电动绞盘实现锤头的提升与释放,并利用虚拟仪器LabVIEW实现对冲击试验系统的数字化控制和数据采集分析功能。以304不锈钢圆管为测试样件,通过冲击试验与ABAQUS有限元冲击仿真试验进行对比,结果表明,冲击实测数据与仿真数据吻合较好,证实所设计冲击试验台具有较高的可靠性。 相似文献
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Yo Kobayashi Akinori Onishi Hiroki Watanabe Takeharu Hoshi Kazuya Kawamura Masakatsu G. Fujie 《Advanced Robotics》2013,27(6):417-430
Needle-based treatments for cancer require accurate placement of the needle tip into the target tissue. However, it is often difficult to insert a needle accurately because of the cancer displacement caused by organ deformation. Therefore, developing a planning method based on a numerical simulation that analyzes organ deformation is important for accurate needle insertion. However, predicting the puncture conditions, including the force applied to the needle is not trivial owing to marked variations in the experimental data. The purpose of this research is to develop a novel method for predicting a robust path for straight needle insertion with various puncture points. The method is based on the probabilities of the various puncture conditions and evaluates the expected accuracy of needle placement. First, a probability-based puncture condition was established and the expected accuracy of needle placement was defined. We also performed in vitro needle insertion experiments using a porcine liver. Significant variations in puncture force were observed. Accordingly, we established a probability distribution for the tissue stress caused by the puncture. An in vitro experiment was performed to measure needle placement accuracy using the optimized path. Experimental results show that the proposed method achieves a mean accuracy of 1.5?mm. 相似文献
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《Sensors and actuators. A, Physical》2006,125(2):446-450
Although blood sampling is frequently performed, a system to take blood sample automatically has not yet been developed. To achieve needle control for automatic blood sampling, the changes in puncture force and electric conduction by blood were evaluated. An injection needle with electric conduction electrode was set on a device for measuring puncture force by using a loadcell. When the needle punctured a blood vessel, blood flowed into the needle and caused a short circuit between electrodes attached on the skin surface and inside of the needle. Totally 18 of puncture experiments were carried out on vein of a rabbit's ear. The peak of puncture force caused by piercing the vessel wall and the electric conduction by the blood, were simultaneously observed in successful cases. When the needle pierced the vein out, no peak of puncture force but the electric conduction of the blood was obtained. This result shows that the electric conduction by blood can be applied to control needle insertion to the vein for automatic blood sampling. 相似文献
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头盔冲击试验台是用来检测生产出来的头盔是否符合国家的安全标准。在头盔冲击试验台中,重物落到头盔上有冲击力,传感器将力信号转化成电信号后,调理电路将微弱的电信号进行调理,使从传感器出来的信号满足数据采集系统中模数转换的范围。调理电路包括集成放大器AD524,四阶低通滤波器,隔离,线性化等。这个试验台的传感器信号调理模块不需要市场上功能繁多的调理模块,容易自己实现。 相似文献
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Ibrahim N. Tansel Alexander Tziranis Amir Wagiman 《Journal of Intelligent Manufacturing》1993,4(1):95-107
The entire workpiece on a lathe vibrates when it is excited at a single point. Frequency and time-domain/time-series techniques can estimate the force-displacement relationships between excitation and the individual points on the workpiece. In this paper, the use of single neural network is proposed to represent the force-displacement relationship between the applied excitation force and the vibration of the whole workpiece. The accuracy of the proposed approach is evaluated on the experimental data. Also, another neural network is used to store the frequency response characteristics of the workpiece. 相似文献
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介绍了电子天平性能测试平台的功能设计及其实现方法。测试平台采用Visual Basic作为编程工具,数据库作为存储系统,实现了数据接收、数据库存储、数据分析、实时曲线显示和建立数学模型等功能。该方法可作为改进与研发新的高精度电子天平的基础。 相似文献
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一种实用的计算机温度采集系统 总被引:1,自引:0,他引:1
介绍了一种实用的利用计算机采集温度的系统实现方法,包括硬件的组织结构和软件的编制。硬件选用ADAM数据采集模块、铂电阻和普通微机,软件采用VB6.0,在Windows平台上编译实现通讯控制、温度实时采集及绘制温度曲线、数据处理等常用功能,充分利用了计算机强大的计算处理、通讯控制功能,实现了温度采集的自动化。系统组建简单方便,使用灵活可靠,为基于计算机和传感器的数据采集系统提供了一种简单而实用的实现方法。 相似文献