一种水中臭氧分析仪校准系统

水中臭氧分析仪广泛应用于食品、制药、水产养殖、化妆品等行业,用来检测水中臭氧的浓度。此类仪器的校准需求非常迫切。通过设定臭氧制作池的水温,调节臭氧发生器的产率,保证制取不同浓度的臭氧水溶液,研制了水中臭氧分析仪校准系统。通过水中臭氧分析仪校准系统的建立可以实现水中臭氧分析仪的检测校准。同时还对校准系统的检测原理、检测浓度范围确定和测量不确定度进行了探讨和研究。     

μg/L级溶解氧分析仪校准装置

该校准装置是针对本所研制的μg/L级溶解氧分析仪的工作特点而研制的一套计量校准装置。该装置有机地把电化学分析理论与现代仪表检测技术结合起来，通过在系统中控制加入氧量值，用高精度的进口溶解氧分析仪同725所研制的溶解氧分析仪进行测量比较，来达到校准溶解氧分析仪的目的。该装置采用计算机进行数据采集与处理，显示和打印输出。     

粒子尺寸分布的激光衍射测量研究

提出了用于喷雾雾化分析和固体粉末粒子的激光粒度分析仪的设计原则。给出了进行粒子测试的数学模型,编制了系统软件。用实际设计的仪器进行了喷雾雾化分析和流化床催化剂粒度测量,证明了所提出的设计原则的正确和该仪器研制的成功。     

电化学噪声技术检测核电环境材料的腐蚀损伤

探讨和解决了电化学噪声技术在核电环境材料腐蚀损伤检测应用的关键问题,建立了基于零阻电流(ZRA)检测的SCC电化学噪声测试体系.采用小面积的Pt或表面热喷涂陶瓷涂层的工作电极材料作为对电极,研制适用于核电现场检测的多种电化学传感器.运用Compact RIO模块化仪器和设计制作的基于ZRA电路的电化学噪声测试模块,实现电位-电流噪声的同步测量和采集.成功研制出便携式核电材料损伤检测系统.应用研制的测试系统和电化学传感器研究了高温高压和动态水环境304不锈钢的电化学噪声谱特征.并初步实现了在役核电站辅助车间不锈钢管道表面直接腐蚀检测和钢厂动力锅炉连续排污管的现场腐蚀检侧,取得了比较满意的结果.     

硅酸根分析仪检测方法的探讨

介绍了硅酸根分析仪的工作原理和仪器结构，对硅酸根分析仪的计量检测项目及技术指标进行了确定，并通过实验进行了验证。对检测过程中出现的问题进行了研究探讨，阐述了硅酸根分析仪的现状及发展。     

基于紫外差分吸收光谱的高温便携式 气体分析仪的设计

针对超低排放的烟气监测,研制了基于紫外差分吸收光谱技术的便携式高温烟气分析仪,阐述了分析仪的测量原理以及仪器的机械结构、光学、温控设计,采用不同浓度的SO2和NOX标准气体在不同环境条件下对该仪器进行测试,结果表明仪器的性能指标可达到污染源环保管理和环境污染应急监测的要求,具有良好的环境适应性。基于该仪器的硬件平台,未来通过扩展设计和应用开发升级也可应用于大气监测领域的走航监测。     

一种水质在线分析仪自动校准装置的研制及应用

正一、校准装置概述1.概述我院研制的水质在线分析仪自动校准装置(以下简称"校准装置"),可通过被检仪器公司提供数据传输协议文本,实现对被检仪器的检测控制及数据接收,可在无人值守的情况下,按照预设的标准或要求,对水质在线分析仪进行不间断测试,并在测试结束后自动保存原始数据文件。其设计路线如图1所示。     

多通道自校准热红外辐射计实验室定标及比对验证

热红外辐射计在获取野外地物信息和验证遥感卫星观测数据方面起着至关重要的作用，其定标精度直接影响到遥感数据分析的精度和应用的水平。探讨多通道自校准热红外辐射计的设计思想，进行了实验室定标实验和重复性实验，验证了长时间运行状态下仪器测量数据的水平，得到仪器辐射亮温的不确定度为0.27 K。与主流辐射计进行了实验室测试分析，对比二者所得定标结果的准确性，多通道自校准热红外辐射计最大偏差值为0.26℃,整体偏差在0.3℃以内，通过户外草地测试实验验证了仪器的测量水平。结果表明多通道自校准热红外辐射计具有较高的精度水平，能够满足外场长时间、多通道、高精度的工作要求，为外场定标提供了有力的数据支撑。     

电化学交流阻抗的计算机解析

英国Solartron仪器公司制造的1250频率响应分析仪,在APPLEⅡ-e计算机的控制下可以自动测量电化学交流阻抗。但因这套系统不是专门为电化学交流阻抗测量而设计的,所以没有具备关于电化学参数的计算、列表和绘图等软件。为了满足电化学交流阻抗测量对模型电路参数求解的需要,我们编制了电化学交流阻抗数据处理程序(简称PPEID程序)。 本文对编制PPEID程序的理论基础,非线性拟合方法,初值计算,电化学参数计算及应用实例均作了详细的阐述。     

斑点酶联免疫分析仪校准用模拟斑点标准物质

根据斑点酶联免疫分析仪的技术参数,结合酶联斑点的培养生长特性,采用AutoCAD设计模拟斑点图形,研制了模拟斑点标准物质,经过均匀性和稳定性检验,由八家实验室采用人工识别计数的方法进行协同定值,并进行不确定度评估。结果表明,该标准物质均匀性良好,在实验室室温避光条件下保存,稳定性在1 a以内,并成功应用到斑点酶联免疫分析仪的计量校准工作中,对仪器示值误差和重复性的计量特性进行实验研究,为仪器日常的校准工作以及国家计量校准规范的制定提供了实验基础。     

FPGA-Based Multiple-Channel Vibration Analyzer for Industrial Applications in Induction Motor Failure Detection

Early detection of failures in equipment is one of the most important concerns to industry. Many techniques have been developed for early failure detection in induction motors. There is the necessity of low-cost instrumentation for online multichannel measurement and analysis of vibration in the frequency domain, and this could be fixed to the machine for continuous monitoring to provide a reliable continuous diagnosis without needing trained staff. Field-programmable gate arrays (FPGAs) are distinguished by being very fast and highly reconfigurable devices, allowing the development of scalable parallel architectures for multichannel analysis without changing the internal hardware. The novelty of this work is the development of a low-cost FPGA based on a multichannel vibration analyzer; this is capable of providing an automatic diagnosis of the motor state carrying out online continuous monitoring. To test the functionality of the proposed vibration analyzer, three experiments on 746-W (1-hp) induction motors were carried out. Such experiments are intended to detect motor failures such as broken bars, unbalance, and looseness. The obtained results show the overall system performance.      

用光纤燃烧传感器测量汽油机的燃烧时间参数

介绍了一个光纤燃烧传感器＋（ＯＭＡ４光多通道分析仪组成的测量系统，用以测量汽油机燃烧火争光谱。光谱分析结果再次证实了燃烧火焰中ＣＨ（４３１．５ｎｍ），Ｃ２（５１６．ｎｍ），Ｈ２Ｏ３（５８９ｎｍ）等自由基的特征光谱同Ｃ粒子的热宫续光谱叠加在一起，构成了火焰光谱。根据光谱曲线中Ｈ２Ｏ光强峰值变化可以确定汽油机燃烧过程中重要的时间参数。着火延迟期和燃烧持续期。由于汽油机燃烧循环环变动大，与单色仪＋ＢＯＸ     

受激拉曼散射阈值光强的测定

本文提出一种测量受激拉曼散射阈值光强的方法,利用光学多道分析仪的递增延迟时间功能控制调Q开关,改变输出的激光光强以达到测量阈值光强的目的。这种方法适用于对激光光强表现出阈值特性的物理量的测量。     

Structural methodological scheme to develop analysis procedures for oxide materials using atomic emission spectroscopy

A generalized structural methodological scheme for developing atomic emission analysis procedures for oxide materials with the use of a multichannel analyzer of emission spectra is elaborated. In accordance with the scheme proposed, we present the results of studies on the development of unconventional procedures for ceramic materials.     

Combined means of signature-logic analysis

An approach is proposed that enables combined radio-measuring instrument to be designed with logic and multichannel signature analyzer functions. It is shown that such instruments are an effective means of diagnostics for the latest generation of digital radio-electronic apparatus, and can be successfully employed at all stages of the life cycle. Translated from Izmeritel'naya Tekhnika, No. 5, pp. 59–61, May, 1996.     

Power voltage source synchronized with a spectrometer for real-timespectroscopic studies of pulsed discharges

The evolution of the species generated in a plasma may be characterized through real-time optical emission spectroscopy. Nevertheless, for experimental situations in which the light emission intensity is insufficient for acquisition times of several tens of milliseconds (typical resolution time of optical multichannel analyzers), some complementary instrumentation has to be incorporated. In this paper, we present the design of an experiment to study the spectroscopic evolution of a plasma during a switch-on of a dc discharge, and/or during its switch-off (afterglow). The solution consisted of a periodic discharge generated by a dc square wave voltage source, synchronized with the optical multichannel analyzer of the spectrometer through its TTL (transistor-transistor logic) level pulse. The periodicity of the discharge under similar physical conditions allows accumulation the spectroscopic information for each cycle, making possible a time resolution of tens of milliseconds by increasing the resulting intensity profile of the spectra     

Chirp变换频谱分析仪的设计及其数字部分的实现

太赫兹频谱分析仪应用技术中,Chirp变换频谱分析应用了声表面波滤波器件,能够保障中频、分辨率等参数,满足深空探测领域对稳定性和功耗的严格要求。但目前国内的Chirp变换频谱分析仪只能处理400 MHz带宽的输入信号,不能完全满足应用需要。为了提高带宽,本文围绕1 GHz带宽声表面波滤波器件,利用直接数字频率合成技术产生与其匹配的2 GHz带宽的线性调频信号,设计了带宽为1 GHz,中心频率为3. 2 GHz的频谱分析仪,并对数字部分进行了实现和结果分析验证。     

Time-Resolved Optical Spectroscopy of Lead at Near Critical-Point States

Experiments were performed to investigate the behavior of lead near its critical point. Emission spectra of shocked lead samples during unloading into helium at different initial pressures were measured by an optical multichannel analyzer (OMA), as well as by a fast optical pyrometer. To describe the obtained experimental data, a model of a thin mixture layer was suggested, in which helium emits due to the presence of external electrons from lead.     

A single chip microcontroller based portable multichannel analyzer

The development of a portable multichannel analyzer for gamma spectroscopy applications is described. The developed unit is based on the Intel 8751 single chip microcontroller and has CRT and liquid crystal displays, preamplifying and amplifying sections, high voltage supply, built-in printer and runs on rechargeable batteries. The design uses standard off the shelf components, minimizes chip count by using all the microcontroller's resources and implementing most functions in software, and this results in a low cost system with good performance. Hardware and software design along with their integration are discussed.     

Hybrid incoherent optical pattern recognition system

A pattern recognition system that uses incoherent spatial filtering to recognize images directly from a narrowband phosphor television monitor is described. Images of real objects are captured with a television camera. These images are then edge-enhanced electronically and displayed on the TV monitor. The monitor output is used directly as the input to a holographic correlator. An optical multichannel analyzer at the correlation plane is used to analyze the shape of the correlation function and to determine the position of its peak. Experimental results agree well with theory. Concepts for handling rotation, aspect angle, and scale variations of the input are discussed.