压力表自动检定装置

利用PC机、PLC为主要硬件,组态王软件为开发平台,组成计算机控制系统,构建压力表自动检定装置。根据检定规程要求,由计算机控制造压系统,任意设置压力点,实现检定过程自动化。装置自动采集标准压力值,自动计算示值误差、回程变差、轻敲位移,与检定规程允许误差计算一览表比较,自动判定压力表的合格与否。实现可视的操作界面、保存检定数据、打印检定证书。     

DWK—702P.I.D参数整定的理论和实践

《自动化仪表》1984年第3期刊登了拙作"温度仪表单回路控制的实验整定方法"一文,这几年又对由DWK-702精密温度自动控制装置和热电偶检定炉构成的温度单回路控制的PID参数整定进行了理论分析和实验整定。热电偶检定对电阻炉的温度自动控制装置有较高的要求:炉温的上升时间应尽可能短;炉温上升到一个检定点炉内温度的波动应在较短的时间内符合检定规程规定的恒定要求。目前,虽然技术设备先进的单位开始使用微机控制的热电偶检定装置,但还有不少单位使用DWK-702精密温度自动控制装置。该装置由DWT-702精密温度自动控制仪表(简称702单机)、可控硅、交流接触器、XCT-101型动圈式温度调节仪、电流表、电压表、隔离变压器等部件组成,所以使用方便、控制精度高(1250℃±0.5℃),具有超温自动断电、断偶保护、安全可靠等特点。     

研华推出模拟量输入模块

研华自动化近日发布了两款ADAM分布式数据采集模块，ADAM-5017P和ADAM-5018P。     

GPRS技术在农村自来水远程遥测遥控系统中的应用

鉴于传统的人工抄表模式存在漏抄、估抄、自来水自动控制工作量较大且效率较低等问题,为提高新农村供用水自动化管理水平,提出一种供用水远程监控方案。控制系统的监控主机通过G200型GPRS通信模块实现与终端供水站的远传水表以及测控模块ADAM4060之间的通信,进而完成对用户用水情况的实时遥测与遥控。实际运行证明,系统运行稳定可靠、准确无误,在我国地理位置比较分散的农村地区具有一定的实践应用和推广价值。     

声级计电性能自动检定系统的设计与实现

目前人们对噪声污染越来越重视,送检的声级计日益增多,传统的手动检定方式的效率已经很难应付,因此提出设计一款基于LabVIEW软件平台的声级计自动检定系统,以实现声级计的自动检定;系统依据JJG188-2017《声级计检定规程》设计,通过控制标准信号源(KeySight33520B)和程控精密衰减器生成标准检点信号传输到声级计电信号输入端,声级计响应以后将检定结果返回给系统,文章介绍了系统的设计方案;经过实验,系统可测量声级计频率范围10 Hz~20 kHz,声压级动态范围110 dB;在实际应用中能很好的完成仪器自动控制、数据采集、数据分析处理、检定原始数据记录报告生成等自动化检定工作,提高了声级计检定的工作效率、减少人为误差确保了检定结果的准确可靠。     

湿度检定系统自动化改造升级的设计

针对目前气象部门普遍使用的传统的湿度计量检定设备进行自动化改造,阐述了改造的整体思路,给出了接口电路和气路机械控制的设计原理,以及软件设计流程;在WindowsXP系统下采用串行通信技术实现检定数据自动采集、自动处理数据和自动打印检定证,并建立检定数据库;应用结果表明,经过改造后的湿度检定系统实现了全程检定自动化,大大减轻劳动强度,显著减少人为误差,缩短检定时间,提高工作效率,具有较高的推广使用价值。     

ADAM5000系列CAN模块在变电站综合自动化中的应用

本文介绍了研华公司ADAM5000系列CAN总线数据采集模块的特点,并详细介绍了其在变电站综合自动化中的应用实例。     

一种基于YL-69温湿度传感器的自动浇花系统设计

设计一种基于YL-69温湿度传感器的自动浇花系统,选用8位STC89C52芯片作为主控制芯片。系统主要由温湿度传感器YL69模块、液晶显示器LCD1602模块、单片机STC89C52控制模块、执行模块、时钟及复位模块、报警模块以及水泵控制电路组成。温湿度传感器检测土壤的湿度,结合预先设置好湿度的上限值和下限值判断土壤是否需要浇水。此系统可以改变预先设定好的湿度值,能够适应四季的变化,使花卉更好的生长。整个浇花过程无需人为的操作,实现了自动控制,解放了浇花的人。系统具有扩展性好,操作简单,实用性强等特点。     

三相仿真电能表综合检定系统的设计

根据电力公司检定部门对电能表检定人员技能培训及考核的要求,设计了三相电能表综合检定系统.该系统由三相仿真电能表、接线检测模块和客户端检定软件三部分组成.采用ARM微处理器及Zigbee通信等技术仿真实现了电能表检定规程中电能表、检定设备和检定软件所要求的功能.实际应用表明,该系统大大提高了电力公司检定人员的检定质量和效果.     

标准金属量器自动控制装置和检定方法的研究

一等金属量器与被检金属量器按容量比较法检定的过程中,很多环节受到人为干预。为了在金属量器检定过程中提高工作效率、减少人工对标准器读数的干扰、提高准确度,设计了以一等标准金属量器作为主标准器检定二等、三等金属量器的自动控制装置。通过计量颈微调阀门的溢流结构装置的设计和三通阀齿轮减速传动结构的改进,根据新型金属量器结构,设计了一套完整的控制系统。该系统实现了恒温水箱的注水、标准量器自动控制液位及验证、被检金属量器注水检定等自动化控制功能。多项试验结果表明:新型金属量器结构及控制系统符合准确度的要求,大幅度提高了检定效率,减少了人为因素影响,一定程度上提高了金属量器的准确度和重复性。该研究为金属量器溯源提供了一种高效的方法,为金属量器的计量开辟了一种新的思路,整体提高了容量计量的自动化程度和测量水平。     

降低高分子电容式湿敏元件湿滞的实验研究

针对高分子电容式湿敏元件的湿滞无法通过后续电路完全实现补偿的问题,提出了从高分子电容式湿敏元件本身降低湿滞的方法。主要从制作工艺、湿敏材料的选择两方面进行了实验验证,并对制作完成的高分子电容式湿敏元件进行性能测试与数据分析。实验结果表明：通过控制制作工艺和对湿敏材料进行改性可以降低湿滞,湿滞优于1.5%RH。采用该方法制作的湿敏元件无需再次通过后续电路进行湿滞补偿。     

Efficient verification of railway infrastructure designs against standard regulations

In designing safety-critical infrastructures s.a. railway systems, engineers often have to deal with complex and large-scale designs. Formal methods can play an important role in helping automate various tasks. For railway designs formal methods have mainly been used to verify the safety of so-called interlockings through model checking, which deals with state change and rather complex properties, usually incurring considerable computational burden (e.g., the state-space explosion problem). In contrast, we focus on static infrastructure models, and are interested in checking requirements coming from design guidelines and regulations, as usually given by railway authorities or safety certification bodies. Our goal is to automate the tedious manual work that railway engineers do when ensuring compliance with regulations, through using software that is fast enough to do verification on-the-fly, thus being able to be included in the railway design tools, much like a compiler in an IDE. In consequence, this paper describes the integration into the railway design process of formal methods for automatically extracting railway models from the CAD railway designs and for describing relevant technical regulations and expert knowledge as properties to be checked on the models. We employ a variant of Datalog and use the standardized “railway markup language” railML as basis and exchange format for the formalization. We developed a prototype tool and integrated it in industrial railway CAD software, developed under the name RailCOMPLETE^®. This on-the-fly verification tool is a help for the engineer while doing the designs, and is not a replacement to other more heavy-weight software like for doing interlocking verification or capacity analysis. Our tool, through the export into railML, can be easily integrated with these other tools. We apply our tool chain in a Norwegian railway project, the upgrade of the Arna railway station.     

水准仪磁致误差检定程序的VC++实现

在Visual C++平台上编写了水准仪磁致误差检定程序。利用NI-VISA接口对产生磁场的可编程电源输出电流进行精确控制,通过Access数据库实现对仪器信息和检定数据的存储与提取,最终根据规程要求计算出检定结果并将其在对话框中进行打印（或预览）,可应用于磁致误差检定装置中以提高检定效率和自动化水平。     

In silico approaches and proportional odds model towards identifying selective ADAM17 inhibitors from anti-inflammatory natural molecules

ADAM metallopeptidase domain 17 (ADAM17) is an attractive target for the development of new anti-inflammatory drugs. We aimed to identify selective inhibitors of ADAM17 against matrix metalloproteinase enzymes (MMP-1, MMP-2, MMP-3, MMP-7, MMP-8, MMP-9, MMP-13, and MMP-16) which have substantial structural similarity. Target proteins were docked with 29 anti-inflammatory natural molecule ligands and a known selective inhibitor IK682. The ligands were screened based on Lipinski rules, interaction with the ADAM17 active site cavity, and then ranked using the proportional odds model multinomial logistic regression. Silymarin was the most selective inhibitor of ADAM17 exhibiting H-bonding with Glu 406, Gly 349, Glu 398, Asn 447, Tyr 433, and Lys 432. Molecular dynamics simulations were carried out for 10 ns. The root mean square deviation (RMSD), root mean squared fluctuations (RMSF), radius of gyration (Rg), solvent accessible surface area (SASA), and H-bonding indicated the induced metastability. A comparison of the principal component analysis revealed that the silymarin complex also explored lesser region compared to IK682 complex. A control study on ADAM17 protein (2OI0) is included. These observations present silymarin (widely present in plants such as milk thistle (Silybum maianum), wild artichokes (Cynara cardunculus), turmeric (Curcuma longa) roots, coriander (Coriandrum sativum) seeds, etc.) as a promising natural template for development of ADAM17 selective drugs.     

面向实时数据的CPS一体化建模方法

信息物理系统（cyber-physical system，简称CPS）是一个在环境感知的基础上整合了物理和计算元素的系统，它可以智能地响应真实世界的动态变化，具有重要而广阔的应用前景.然而，CPS工作在复杂的物理环境中，周围的物理变化会对CPS的行为产生影响.因此，确保CPS在复杂环境中的安全性和可靠性至关重要.提出了一种面向实时数据的一体化建模方法，通过定义一系列的规则，将领域环境模型组合到运行时验证过程中去，从而保证CPS在不确定环境中的安全性和可靠性.该方法首先为环境建立数学模型.然后，设计合并规则将相同系统参数下仅有一个环境影响因子的数学模型合并为相同系统参数下有一个或多个环境影响因子的数学模型.之后，定义转换规则，将数学模型转换为伪代码表示的环境模型.最后，根据组合规则将环境模型组合到运行时监视模型中执行验证.该方法使得监视模型更加完整、准确，当环境发生变化时，通过动态调整参数范围使得CPS中的安全属性在复杂的物理环境中仍然得以满足.将该方法应用到移动机器人避障实验中，对影响电池容量的温度和湿度进行数学建模，然后将环境模型组合到监视模型中去，最终实现在执行任务前可以根据不同的物理环境准确地给出续航时间安全提醒.     

基于ZigBee技术的家居环境监测设计

采用zigBee技术与SHTll相结合的方法,给出了智能家居环境中的温湿度检测系统的硬件结构和软件环境设计方案,同时进行了分析和验证,从而为智能家居环境设计提供了有利的参考。     

Validation of ground-based microwave radiometer data and its application in verifying atmospheric stability over Mahbubnagar during 2011 monsoon and post-monsoon seasons

Atmospheric instabilities, mainly convection, depend on temperature distribution and moisture availability. The development of convection can often lead to the formation of clouds and precipitation, release of latent heat, etc. The initiation or development of instabilities has to be studied in detail with high-resolution, ground-based instruments such as ground-based microwave radiometric measurements. In this study we evaluated ground-based microwave radiometer data (MWR)-retrieved temperature and relative humidity profiles and compared these to radiosonde observations. Analysis showed that MWR-measured temperature (specific humidity) has a warm (wet) bias below 3 km and cold (dry) bias above that altitude. Correlation of stability indices estimated from radiometer and radiosonde showed fairly good correlation, with a correlation coefficient greater than 0.5 with 95% significance. MWR was then utilized for the verification of atmospheric stability over Mahbubnagar (16° 44′ N, 77° 59′ E), India, during the second half of the monsoon and start of post-monsoon seasons. Radiometric observations showed strong day-to-day variation of atmospheric parameters as well as thermodynamic indices during the monsoon, which were weak during the post-monsoon season. The seasonal mean of thermodynamic indices and the associated seasonal difference showed that thunderstorm potential is higher during the post-monsoon season over the study site.     

应用组合方法设计普适计算网络安全协议*

给出一种新的安全协议的设计方法——组合设计方法,首先分别实现各个安全目标,然后将它们组合为一个新的安全协议。组合方法设计安全协议具有易于实现、易于验证等优点。给出组合规则,使用组合方法实现了普适计算环境下认证协议及密钥协商协议的设计。     

基于GSM和WSNs的实验室温湿度采集报警系统设计

针对计量校准实验室严格的环境条件要求,设计了一种基于无线传感器网络(WSNs)的实验室温湿度采集报警系统.以STC12C5A60S2微处理器为控制核心,收集、处理和储存各校准实验室内传感器节点数据信息,并通过GTM900C模块实现数据信息的远程传输.当实验室内温湿度超出设定的阈值时,系统可自动传输超限报警信息.系统精确度高、实用性强、性能稳定可靠,能准确监测、记录实验室的温湿度,有效规避在环境不合格的条件下进行检定、校准及测试项目,具有很强的实际应用价值.