NI聲音和振動模塊可在單個PXI插槽中提供16個同步的24比特數(shù)據(jù)采集通道 2007年8月1日消息，通過NI的新高精度數(shù)據(jù)采集模塊（為聲音和振動應(yīng)用而專門設(shè)計的）。工程師和產(chǎn)品設(shè)計師們現(xiàn)可以很容易建立復(fù)雜的，且具備高通道計算應(yīng)用的同步系統(tǒng)。 NI的PXI-4498和PXI-4496動態(tài)信號采集（DSA）模塊可在每個模塊上提供16個同步的24比特模擬輸入，并為帶有麥克風(fēng)和高通道數(shù)系統(tǒng)的精密測量儀器，提供IEPE恒定電流信號調(diào)節(jié)裝置，如噪音映射，光束的形成應(yīng)用和結(jié)構(gòu)振動。NI PXI-4498有四個模擬輸入電壓，NI PXI-4496只有二個。這是NI提供的最密集的DSA模塊，單一PXI模塊有16個同步通道。工程師可利用帶有18個插槽的PXI底盤的模塊，在一個或是在一個超過13,000同步通道的分布式PXI系統(tǒng)里控制272個同步通道。此模塊在每個通道的取樣率達(dá)到204.8 kS/s，包括支持誤差測試的TEDS智能傳感器。 新DSA模塊與現(xiàn)存的所有的PXI模塊一起工作，也可集成在各種軟件中，包括NI LabVIEW圖形開發(fā)環(huán)境和LabVIEW信號表達(dá)，以及用于簡易確認(rèn)的NI聲音和振動傳輸軟件。 關(guān)于PXI PXI是PCI 在儀器領(lǐng)域的擴展（PCI Extension for Instrumentation），是一款開放型的由PXI系統(tǒng)聯(lián)盟（www.pxisa.org）控制的，該聯(lián)盟定義了一個基于Compact PCI的平臺，用于測試，測量和控制的優(yōu)化。成立于1997年，PXI規(guī)范是由70多個會員公司支持定制的，現(xiàn)有產(chǎn)品1,200個。PXI產(chǎn)品與Compact PCI和CompactPCI Express工業(yè)計算機標(biāo)準(zhǔn)都相兼容，如環(huán)境規(guī)范，標(biāo)準(zhǔn)軟件和及時和同步性。 關(guān)于NI NI（美國國家儀器有限公司，簡稱NI），將工程師和設(shè)計師們的方法轉(zhuǎn)換到測量，自動化和嵌入式應(yīng)用中。NI為用戶提供現(xiàn)貨軟件，如圖形開發(fā)環(huán)境NI LabVIEW和經(jīng)濟(jì)有效的模塊化硬件，這些產(chǎn)品已銷往世界范圍內(nèi)25,000個多個公司。NI總部設(shè)于美國德克薩斯州的奧斯汀，共擁有4300多名員工，在40多個國家擁有業(yè)務(wù)。在過去的八年中，《財富》雜志評選NI為全美最適合工作的100家公司之一。 original text [COLOR=#708090]New High-Accuracy Modules Provide the Highest NI Channel Density for Simultaneous Measurements NEWS RELEASE – Aug. 1, 2007 – Engineers and product designers now can easily build complex, synchronized systems for high-channel-count applications with the new National Instruments high-accuracy data acquisition modules specifically designed for sound and vibration applications. The National Instruments PXI-4498 and PXI-4496 dynamic signal acquisition （DSA） modules offer 16 simultaneous 24-bit analog inputs per module and IEPE constant current signal conditioning for precision measurements with microphones and accelerometers in high-channel-count systems, such as noise mapping, beamforming applications and structural vibration. The NI PXI-4498 features four analog input voltage ranges, while the NI PXI-4496 has two analog input voltage ranges. With 16 simultaneous channels in a single PXI module, these are the most dense DSA modules from NI. Engineers can use the modules with an 18-slot PXI chassis to hold 272 synchronized channels in a single chassis and more than 13,000 synchronized channels in a distributed PXI system. The modules feature a maximum sampling rate of 204.8 kS/s per channel and include TEDS smart sensor support for error free setup. The new DSA modules work with all existing PXI modules and integrate with a variety of software including the National Instruments LabVIEW graphical development environment and LabVIEW SignalExpress, as well as the NI Sound and Vibration Measurement Suite and Sound and Vibration Assistant. The modules come with NI-DAQmx driver software for easy configuration. About PXI PCI eXtensions for Instrumentation （PXI） is an open specification governed by the PXI Systems Alliance （www.pxisa.org） that defines a rugged, CompactPCI-based platform optimized for test, measurement and control. Founded in 1997, the PXI specification is supported by more than 70 member companies and more than 1,200 products are available. PXI products are compatible with the CompactPCI and CompactPCI Express industrial computer standards and offer additional features such as environmental specifications, standardized software and built-in timing and synchronization. About National Instruments National Instruments （www.ni.com） is transforming the way engineers and scientists design, prototype and deploy systems for measurement, automation and embedded applications. NI empowers customers with off-the-shelf software such as NI LabVIEW and modular cost-effective hardware, and sells to a broad base of more than 25,000 different companies worldwide, with no one customer representing more than 3 percent of revenue and no one industry representing more than 10 percent of revenue. Headquartered in Austin, Texas, NI has more than 4,300 employees and direct operations in nearly 40 countries. For the past eight years, FORTUNE magazine has named NI one of the 100 best companies to work for in America.[/COLOR]