我国测量仪器设备行业的发展现状

近年来,以信息技术为代表的新技术促进了电子行业的飞速增长,也极大地推动了测试测量仪器和设备的快速发展。鉴于我国在全球制造链和设计链的重要地位,使得这里成为全球各大仪器厂商逐鹿的大战场,同时,也带动了我国测试测量仪器研发与测试技术应用的迅速发展。本文针对我国测量仪器设备行业的现状进行分析,找出存在问题,提出解决措施及建议。     

工业无线技术在大型石油化工罐区自动化的应用

随着无线技术的迅速发展，在工业自动化领域的应用越来越广泛。本文介绍工业无线技术标准ISA100．11a及无线解决方案，霍尼韦尔基于ISA100．11a工业无线标准的解决方案在大型石油化工罐区自动化的应用。     

Simplified Impedance Model for Adhesively Bonded Piezo-Impedance Transducers

The electromechanical impedance technique employs surface-bonded lead zirconate titanate piezoelectric ceramic patches as impedance transducers for structural health monitoring and nondestructive evaluation. The patches are bonded to the monitored structures using finitely thick adhesive bond layer, which introduces shear lag effect, thus invariably influencing the electromechanical admittance signatures. This paper presents a new simplified impedance model to incorporate shear lag effect into electromechanical admittance formulations, both one-dimensional and two-dimensional. This provides a closed-form analytical solution of the inverse problem, i.e. to derive the true structural impedance from the measured conductance and susceptance signatures, thus an improvement over the existing models. The influence of various parameters (associated with the bond layer) on admittance signatures is investigated using the proposed model and the results compared with existing models. The results show that the new model, which is far simpler than the existing models, models the shear lag phenomenon reasonably well besides providing direct solution of a complex inverse problem.     

Impact of agriculture activities on a coastal aquifer in Tunisia and options for a better water management

The quality of a coastal aquifer (Korba, Tunisia) in a semi-arid agricultural region was studied by the collection and analysis of groundwater samples for their main chemical and biological parameters in relation to the SEQ evaluation system for groundwater quality. Results indicate important anthropogenic deterioration. Most of the samples were unsuitable for drinking-water production; animal drinking and irrigation with these waters will require caution. The high contamination is mainly due to the local intensive agriculture. Based on the objectives-oriented project planning method, regulatory and socio-economic instruments were extensively developed to encourage sustainable agriculture through a participatory exercise.     

微机自动控制电化学测试系统的研制

研制了一套由ＩＢＭ－ＰＣ机为上位机、单片机为前端机的电化学测试系统．结合恒电位仪，成功地实现了实验条件控制、数据采集和结果处理的自动化，该测试系统具有速度快、精度高、操作方便及参数修改灵活等特点．用于实际体系的电化学测量，取得了较好的效果．     

有效添绪效率的测定量及其检测研究

本文从制丝工艺学角度导出了有效添绪效率与其测定量之间的关系式,简要介绍了采用光电及计算机技术研制的有效添绪效率测定装置的原理及方法。     

基于虚拟仪器的铁轨损伤检测系统

本文介绍了铁质材料因裂纹或损伤而产生缺陷的定量检测原理。设计了基于虚拟仪器的铁轨损伤检测系统。详细介绍并分析了LabVIEW开发平台在数据采集和数据分析上的实现方法．实现了一台PC同时对多条铁轨进行损伤检测。并论证该方法的可行性与可靠性，得出了相关的结论。     

多功能PC虚拟测试分析仪

虚拟仪器具有强大的数据处理功能,并要求采用先进的分析算法和灵活的分析手段.因此虚拟测试仪开发要求高水平的专业知识和精湛的编程技艺.本文所介绍的虚拟测试分析仪设计,以PC机作为主控单元,运用Matlab,处理数据采集卡得到的检测数据,完成混合编程的虚拟仪器系统.该系统结构简单,算法灵活,具有多种测试分析功能,并易于扩展.     

基于labview的监测系统设计与实现

此文仔细分析了某电源系统的监测需求,采用labview开发环境,结合VC++和数据库技术,系统设计并实现了该电源监测系统