Development of the Universal Laboratory System Based on LabVIEW

基于LabVIEW的网络虚拟实验仪器的开发是为了解决传统实验系统数据处理能力弱和远程数据采集上的不足等问题而提出的。就LabVIEW虚拟仪器开发平台下网络实验仪器的开发方法作了介绍,对开发过程中的数据采集和网络通讯这两个关键技术作了详细阐述,并简单讨论了LabVIEW平台下数据处理编程的优越性。The Development of the universal laboratory system based on LabVIEW is to provide the solution of problems in traditional universal laboratory systems for data treatment and remote data acquisition. This paper introduced the way to develop the universal laboratory system under LabVIEW. The key technology of data acquisition and internet communication was also presented. And the advantage of LabVIEW for data treatment was discussed

Object Tracking Based on Adaptive Particle Filter

基于蒙特卡洛模拟的粒子滤波算法被广泛地应用于目标追踪领域。传统的粒子滤波算法在其追踪过程中所使用的粒子数通常是固定不变的,而在实际应用中,这会使算法缺乏高效性。针对这个问题,提出了一种自适应性粒子滤波器,它可以根据实际调整算法运行过程中使用的粒子数目,以使算法在保持对目标进行有效追踪的同时节省计算资源。仿真结果显示了算法的高效性。As an efficient algorithms particle filter has been widely used in the area of object tracking.Normally number of particles being used in the algorithm is given as a constant which would somewhat make the algorithm unstable and inaccurate.As that an adaptive particle filter is proposed,this motion model and particle number can change adaptively according to the object's moving state.And the simulation shows that our algorithm is very effective when used in the tracking program

IMPLEMENTING CASSY SOFTWARE BASED ON LABVIEW

【中文文摘】主要介绍了如何在LabVIEW平面下直接与CASSY实验系统的连接。给出了用LabVIEW软件实现细节。同时介绍了利用CASSY实验系统基于串口的高频信号采集的方法。 【英文文摘】A method to communicate with CASSY lab system under LabVIEW.The implementing process of the metod in LabVIEW.The way to collect high frequency signal based on serial port by using CASSY lab system is also presented

The Design Of The True Random Number Generator Based On The γSpectrometry Measuring

本文介绍了一种基于γ能谱测量的真随机数发生器的设计,详细阐述了设计思路。以核脉冲信号作为真随机源,引进伪随机序列进行优化并对结果进行了检测分析。This paper introduces a design of true random number generator based on the γspectrometry measuring, particularly describe the design methods.The acquisition of the true random number is based on the nuclear signal pulse.We introduces the pseudo random number sequence to raise the quality of the random numbers and give the analysis of the result

Automated measurement system for temperature controllable LED electrical parameter based on LabVIEW

基于nI公司的lAbVIEW8.2设计了一套可控温功率lEd电参数自动测试系统,解决了仪器手动操作测量既繁琐费时又容易出错的问题,可自动测量样品在不同温度下的伏安特性,并同步显示测量数据和曲线。利用PId运算调节温度控制的精度,提高了测量结果的准确性和可靠性。并利用本系统对lEd的正向电压与温度的关系进行了实验研究,发现在恒定电流下,温度较高时正向电压与温度成反比关系,温度较低时正向电压随温度减小而突然急剧增大。A temperature controllable automated measurement system for the electrical parameter of power LED based on Labview 8.2 of National Instruments is designed.It solved the problems of the inconvenient and fallible procedure of instrument manual measurement,this system can Automatic measure the voltage-current characteristic of sample at different temperature.Using PID operation to adjust the precision of attemperation and improve the accuracy and reliability of measurement result.And experimental investigation was carried out on the relationship between the forward voltage and temperature in LEDs by this system.It is discovered that at a constant current,in the high temperature region a linear inverse relationship exists between the forward voltage and temperature;while in low temperature region,forward voltage increases drastically as the temperature decreases.福建省半导体照明工程技术研究中心开放课

LED Color Analysis

主要对蓝光、绿光、白光lEd的色度特性进行分析,首先通过单色仪,分别测得蓝光、绿光、白光lEd的相对光谱功率分布并以色度学理论为基础,计算出光源主波长、色纯度、色温和显色指数.计算结果表明:蓝光lEd和绿光lEd主波长随标准光源的不同变化不大,色纯度比较高,分别在0.64和0.87左右,一般显色指数为-29和-14,显色性很差,不适合用来做照明光源.白光lEd主波长随标准光源的不同变化较大,色纯度相当低,接近0,一般显色指数为82,显色性很好,完全符合照明光源的要求.In order to study the color characteristics of light-emitting diode,the characteristics of blue,green and white LED colors are analyzed.Firstly,the spectral power distribution of blue,green,white LED is respectively measured by using the monochromator,and then on the basis of the theory chroma,the main light source wavelength,color purity,color temperature and color rendering index are calculated.The results show that blue LED and green LED dominant wavelengths change little with different standard light sources,and the color purities are relatively high,at 0.64 and 0.87,respectively,the general color-rendering is very poor for the index of-29 and-14,so these blue and green LED are not suitable to be used as lighting source.White LED dominant wavelength largely change with different standard light sources,and color purity is relatively low,near 0,color rendering is good for the general color-rendering index of 82, so white LED is in full conformance with the lighting requirements

Internet communication application in internet universal laboratory system

基于国际互联网的远程通用实验系统的开发将实现远程网络物理实验,解决大多数实验设备连网、远程控制、数据串行自动采集、数据网络自动发送/接收,以及实验数据可视化处理等问题。实验数据/实验设备监控命令的Internet网络传输是该系统设计的一个难点,就为解决该难点而通过建立客户机/服务器模式Socket网络通信的方案给予了详细阐述,并给出了Delphi6.0开发的关于该部分的源代码。The IULS(internet universal laboratory system)provides the solution to remote physical experiments, which offers the network ing of most experiment instruments, remote controlling, automatically remote data capturing, and the visual processing of experiment data. The key technology of internet communication is introduced and the source code for the software devised by delphi 6.0 is also presented.福建省自然科学基金项目(A0310003)

The Development of Universal Laboratory System(ULS) Based on Internet

【中文文摘】就国际互联网远程通用实验系统的开发过程中网络通讯和串行口监控通信这两个关键技术做一详细阐述,并给出了用Delphi6.0开发的软件系统的部分源代码.该系统的开发将实现远程网络物理实验,解决大多数实验仪器连网、远程控制、实验数据远程自动获取以及实验数据可视化处理等问题. 【英文文摘】The ULS provides the solution to remote physical experiments,which offers the networking of most experiment instruments,remote controlling,automatically remote data capturing,and the visual processing of experiment data.The key technology of internet communication and serial port monitoring communication is introduced and the source code for the software devised by Delphi6.0 is also presented.福建省自然科学基金资助项目(A0310003

Serial Communication Application in The Internet Universal Laboratory System (IULS)

【中文文摘】基于国际互联网的远程通用实验系统的开发将实现远程网络物理实验,解决大多数实验仪器连网、远程控制、实验数据远程自动获取,以及实验数据可视化处理等问题.本文将就该系统的开发过程中串行通信这一接口技术给予详细阐述,并给出了用Delphi 6.0 开发的软件系统的部分源代码. 【英文文摘】The IULS provides the solution to remote physical experiments, which offers the networking of most experiment instruments, remote controlling, automatically remote data capturing, and the visual processing of experiment data. The key technology of serial port communication is introduced and the source code for the software devised by Delphi 6.0 is also presented.福建省自然科学基金资助项目(A0310003

Remote Virtual Experiment of Optical Spatial Filtering Based on Labview

提出了一种利用Labview实现光学空间滤波模拟的新方法,并对经典的阿贝-波特实验设计了仿真程序.该程序可根据用户设置的参量生成二维网格光栅作为整个物理过程的输入物,允许用户选择多种不同的滤波方式,如低通、高通、方向滤波等,并可依次操纵成像的各个步骤.程序可脱离编程环境独立运行,具有跨平台、界面友好、易于操作等优点,并可架设基于浏览器的远程虚拟实验.A new method of using Labview to simulate optical spatial filtering is put forward and a simulation program for classical Abbe-Porter experiment is designed.It can generate 2D grid gratings based on user's setting and take them as input objects for the whole physical process.It provides several filtering modes for users to select like low passing,high passing,and directional passing etc.Users can manipulate the imaging process step by step.The program runs independently of programming environment and operating system.It is friendly interfaced and easy to use.Furthermore,constructing a remote virtual experiment based on browsers is possible,which makes it a perfect CAI software for relevant courses.福建省自然科学基金(A0310003);; 福建省高等学校第二批网络课程计划(14)资