NI-CaseStudy-cs-13401

（建筑工程管理）应用NI 技术快速构建土木工程在线监测系统解决方案应用NI技术快速构建土木工程于线监测系统解决方案作者：李涛职务：软件工程师单位：清华大学研究生院应用领域：研究开发使用的产品：cFP-2020CompactFieldPoint控制器模块cFP-AI-110CompactFieldPoint模拟输入模块cFP-TC-120CompactFieldPoint热电偶输入模块cFP-SG-140CompactFieldPoint应变片输入模块PXI-1052PXI和SCXI复合机箱PXI-8186PXI控制器PXI-6220M系列多功能数据采集板卡SCXI-1520应变片调理模块SCXI-1530加速度输入调理模块LabVIEW7.1图形化集成开发环境挑战：将众多采集设备集成到壹个开放平台下，统壹进行数据采集，且需要有壹便捷的工具来快速地构建信号计算处理模型。

于室外无人执守的条件下，要保证系统能长期稳定运行，且需要具备壹定的故障自恢复能力。

同时整个系统要具备很好的灵活性以及软硬件的兼容性，传统的土木工程安全监测解决方案大多是定制的方案，不利于系统本身的扩展也不利于整个方案推广到其它类似的系统上。

应用方案：应用NI的CompactFieldPoint、PXI硬件，以LabVIEW为软件平台，开发壹套桥梁监测系统，对大学城内某于役桥梁进行了实时的安全监测。

这样壹套以虚拟仪器技术为核心的方案具有很好的扩展性和移植性，同时NI公司软硬件的无缝集成更为整个系统的开发提供了很大便利，且且运行实时操作系统的平台提高了系统的实时性和稳定性。

介绍：土木工程监测具有监测点多、分布广、环境影响因素复杂等特点。

应用NI的CompactFieldPoint系列分布式测控模块实现对应变、温度等静态参数的精确测量，具体来说，本系统中使用了AI-110、TC-120、SG-140分别对钢筋锈蚀传感器、热电偶、混凝土应变的信号进行采集。

Ni—NiS合金析氢阴极的制备研究
石秋芝;石春芝
【期刊名称】《郑州大学学报：自然科学版》
【年(卷),期】1998(030)004
【摘要】用电沉积法制备了析氢电极，研究了制备条件对电极析氢活性的影响，测定了该电极在碱性溶液中的析氢活性，并通过稳态极化曲线的测定，给出了在１ｍｏｌ／ＬＮａＯＨ溶液中不同温度下Ｎｉ－ＮｉＳ电极上的析氢反应的动力学参数。

【总页数】4页(P68-71)
【作者】石秋芝;石春芝
【作者单位】郑州大学化学化工学院;深圳大学理学院
【正文语种】中文
【中图分类】O646.541
【相关文献】
1.电沉积Ni-S、Ni-W-S合金析氢阴极的研究 [J], 马强;巴俊洲;蒋亚雄;李军;吴文宏
2.离子膜电解槽用纳米Ni-Mo合金阴极的制备及其催化析氢性能 [J], 张卫国;王飙;刘春松;张溪;姚素薇
3.电沉积Ni-S、Ni-P-S合金析氢阴极的研究 [J], 马强;巴俊洲;蒋亚雄;李军;吴文宏
4.多孔Ni、Ni-Mo合金及其氧化物的制备与析氢性能 [J], 周琦;李志洋
5.Ni-S合金析氢阴极的制备研究 [J], 司敬沛;张建民;黄伟庆
因版权原因，仅展示原文概要，查看原文内容请购买。

INSTALLATION GUIDETB-2605 Isothermal Terminal Block̭͈Ρ΅νιϋΠ͉ͅȂ βȜΐ͜ ̞̳ͦ̀͘͘ȃThis installation guide describes how to install and connect signals to theTB-2605 isothermal terminal block for use with the NI2501 and NI2503PXI switch cards.ContentsIntroduction (1)What You Need to Get Started (2)Signal Names (2)Signal Connection (4)Installing Your Terminal Block (6)Installing the Analog Bus Plug (7)Cold-Junction Temperature Sensor (9)Specifications (11)IntroductionThe TB-2605 is an isothermal terminal block that consists of a printedcircuit board with screw terminals. The terminal block connects directlyto the front panel I/O connector of the NI 2501 or NI 2503.The terminal block can easily accommodate thermocouples, resistancetemperature detectors (RTDs), thermistors, and voltage signals.The TB-2605 features an isothermal construction to minimize thetemperature gradients across the screw terminals and a high-accuracythermistor cold-junction temperature sensor for measuring withthermocouples. Enclosures keep out air currents to maintain an isothermalenvironment for the screw terminals and the cold-junction sensor.Use the screw terminals on the TB-2605 to make connections to allchannels except the cold-junction sensor. The front side of the terminalblock has two additional connectors for connecting to the analog bus. Youcan use the low-voltage AB plug to connect the analog bus of adjacentswitch cards.What You Need to Get StartedYou need the following to set up and use your terminal block:❑One of the following PXI switch cards:–NI 2501–NI 2503❑NI 2501/2503 User Manual❑TB-2605 isothermal terminal block❑0.10 in. slotted screwdriver❑No. 1 Phillips screwdriver❑Wire cutters❑Wire insulation stripper❑Analog bus connectors (to connect to multiple cards)Signal NamesThe NI 2501/2503 has several modes of operation. The following figuresshow the names of the signal connections for the different modes ofoperation.TB-2605 Isothermal Terminal Figure 1. Two-Wire ModeFigure 2. One-Wire Mode© National Instruments Corporation3TB-2605 Isothermal Terminal BlockFigure 3. Four-Wire ModeSignal ConnectionSee your NI 2501/2503 User Manual for examples of how to connect yoursignals. Refer to Figure4 as you perform the following steps to connectyour signals to your terminal block (the numbers in parentheses refer toitems in Figure4).1.Remove the terminal block cover (1) by unscrewing the two coverscrews (2) using the 0.10 in. slotted screwdriver.2.Loosen or remove the strain relief bar (3) by loosening the two strainrelief screws (10).e wire cutters and wire insulation strippers to strip the wire ends asnecessary to connect them to screw terminals.4.Loosen the screws in the screw terminals with the 0.10 in. slottedscrewdriver.5.Insert the stripped wires into the screw terminals. Tighten the screwswith the 0.10 in. slotted screwdriver.6.Connect safety ground or shield wires to the chassis ground connectiontab (7) using the provided solder lug (6).7.Tighten or replace the strain relief screws (10).8.Replace the terminal block cover (1) and tighten the cover screws (2). TB-2605 Isothermal Terminal Figure 4. TB-2605 Parts Locator Diagram© National Instruments Corporation5TB-2605 Isothermal Terminal BlockTB-2605 Isothermal Terminal Block Installing Your Terminal BlockNoteTo minimize the temperature gradient inside the terminal block and thus maintain its isothermal nature for accurate cold-junction compensation, place the terminal block and chassis away from extreme temperature differentials.Refer to Figure 5 as you perform the following steps to connect the terminal block to the NI 2501 or NI 2503 connector (the numbers in parentheses refer to items in Figure 5).NoteThe TB-2605 terminal block must be installed on the NI 2501/2503 switch card after the card is installed in the chassis.1.Install the switch card (3) into the chassis and tighten the two module screws (2).2.Guide the terminal block onto the switch card connector (4).3.Tighten the two terminal block mounting screws (1).CautionThe connectors of both the switch card and the terminal block are polarized. Youcan attach them in only one way. Do not force the terminal block when inserting it into orremoving it from the NI 2501 or NI 2503 connector.Figure 5. Connecting the TB-2605 to the Switch Card Installing the Analog Bus PlugRefer to Figure6 as you perform the following steps to install the analogbus plug. The cover should be attached to the terminal block before youconnect the analog bus plug because the plug screws into the cover(the numbers in parentheses refer to items in Figure6).1.With two terminal blocks connected to boards in adjacent slots,connect the analog bus plug (3) into the analog bus connector (1)of each terminal block.2.Tighten the screw (2) on the analog bus plug using the 0.10 in. slottedscrewdriver.© National Instruments Corporation7TB-2605 Isothermal Terminal BlockFigure 6. Installing the Analog Bus PlugAnalog Bus ConnectorThe front side of the terminal block has two connectors for connecting tothe analog bus. The low-voltage analog bus plug can be used to connect theanalog buses of adjacent switch cards, as shown in Figure6. The signalconnections for the analog bus are shown in Figure7.TB-2605 Isothermal Terminal © National Instruments Corporation 9TB-2605 Isothermal Terminal BlockFigure 7. Analog Bus ConnectorCold-Junction Temperature SensorThe TB-2605 temperature sensor voltage output varies from 198.54 mV to 19.58 mV over the temperature range 0 to 55 °C, respectively, and has an accuracy of ±0.5 °C over the 15 to 35 °C temperature range and ±0.9 °C over the 0 to 15° and 35° to 55 °C temperature ranges.1You can use the following formulas to convert the cold-junction sensor voltage to cold-junction temperature:T(°C) = T K – 273.15where T K is the temperature in kelvina = 1.295361 x 10-3b = 2.343159 x 10-4c = 1.018703 x 10-7R T = resistance of the thermistorV TEMPOUT = output voltage of the temperature sensor1 Includes the combined effects of the temperature sensor accuracy and temperature difference between the temperature sensorand any screw terminal. The temperature sensor accuracy includes tolerances in all component values, the effects caused bytemperature and loading, and self-heating.T K 1a b R T ln ()c R T ln ()3++[]---------------------------------------------------------------=R T 189K V TEMPOUT 2.5V TEMPOUT –----------------------------------⎝⎠⎛⎞=T °F ()[T(°C )]95-----------------------32+=TB-2605 Isothermal Terminal Block where T(°F) and T(°C) are the temperature readings in degrees Fahrenheit and degrees Celsius, respectively.The thermistor resistance varies from 16,305 Ω to 1,492Ω over a 0 to 55°C temperature range.NoteV TEMPOUT varies from 198.54 mV (at 0 °C) to 19.58 mV (at 55 °C). For bestresolution, use the maximum gain for this signal range on the analog input channel of your measurement device.The 200 mV range is designed to eliminate the necessity of changing a measurement device’s signal range to measure the cold-junction sensor while scanning e an average of a large number of samples to obtain the most accurate reading. Noisy environments require more samples for greater accuracy.Figure 8 shows the circuit diagram of the TB-2605 cold-junction temperature sensor.Figure 8.Temperature Sensor Circuit DiagramSpecificationsCold-junction sensorAccuracy1........................................0.5° from 15 to 35 °C0.9° from 0° to 15° Cand 35 to 55 °CRepeatability...................................0.2° from 15 to 35 °COutput.............................................198.54 mV to 19.58 mVfrom 0 to 55 °CDimensions.............................................8.4 by 10.7 by 2.0 cm(3.3 by 4.2 by 0.80 in.)Max voltage(signal + common mode).......................Each input should remain within30 V rms or 60 VDC of ground andall other channels to eliminate thepossibility of hazardous shock.1 Includes the combined effects of the temperature sensor accuracy and the temperature difference between the temperature sensor and any screw terminal. The temperature sensor accuracy includes tolerances in all component values, the effects caused by temperature and loading, and self-heating.© National Instruments Corporation11TB-2605 Isothermal Terminal BlockNational Instruments, NI, , and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section on/legal for more information about National Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD, or /patents.© 1999–2007 National Instruments Corporation. All rights reserved.372258B Nov07。

NI 针对嵌入式系统开发单板式RIO 适NI 针对嵌入式系统开发单板式RIO 适配卡
美国国家仪器(NI)发布4 款扩大作业温度的NI 单板式(Single-Board) RIO 适
配卡，可在-40℃～85℃的作业环境温度范围下运作。

这些适配卡可于单板式
计算机(SBC)上整合快取(Onboard) FPGA、Real-TIme 处理器，还有模拟与数字I/O，为工程师提供低成本的嵌入式系统开发选择。

新的4 款NI sbRIO-9602XT、sbRIO-9612XT、sbRIO-9632XT，与sbRIO- 9642XT 适配卡，均针对机板层级(Board-level)且需延伸作业温度的OEM 应
用所设计，适用于军事、航天、运输、重产业，与机器人的嵌入式系统。

新款适配卡具有最多32 个单端点/16 个差动的模拟输入通道、最多4 个16
位分辨率的模拟输出信道、110 个3.3V/TTL 数字I/O 信道，与最多32 个
24V 数字输入/输出信道。

此外，所有的NI 单卡式(Single-Board) RIO 适配卡均具备19~30VDC 电源供应输入、1 组Ethernet 与RS232 串行端口可进行通讯、3 组扩充接头可整合NI C 系列I/O 与通讯模块，还有可记录数据的非挥
发性储存装置。

新扩充的作业环境温度范围可进一步搭配所有的NI RIO 硬件产品，并透过
NI LabVIEW 图形化系统设计(GSD)平台进行程序设计。

LabVIEW 工具囊括
所有中间件与驱动程序，可降低机板程序设计时的复杂度，并可轻松衔接模。