NI宣布推出新M系列USB數(shù)據(jù)采集設(shè)備，擁有18-bit模擬輸入精確性，取樣率為625 kS/s。 為了保證所有取樣的精確性，這些設(shè)備與NI-PGIA 2 custom 放大器和NI-MCal 自校準設(shè)備相結(jié)合，實現(xiàn)最小化處理時間并保證最大化精確性。車載低通濾波器可被編程，通過排除高頻噪音，進一步改善測量精確性。借助于NI USB-628x設(shè)備，工程師們可傳送在±10 V和28 µV范圍之間，精確性達980 µV，取樣率達625 kS/s。工程師們可以提供在± 10 V和28 μ V范圍之間，采樣率達625 kS/s，一個絕對準確的980 μ V。 USB-6281有16個單端（SE），或是8個不同的 DI模擬輸入信道，2個模擬輸出信道和24個數(shù)字I/O （DIO）信道；USB-6289則有32個 SE，或16個DI模擬輸入信道，4個模擬輸出信道和48個DIO信道。兩個設(shè)備都能提供18-bit模擬輸入625 kS/s（當掃描時可達500 kS/s），16-bit模擬輸出（833 kS/s）。高精度USB-628x設(shè)備還可以提供加強的波形產(chǎn)生。 高精度NI M系列多功能DAQ設(shè)備是應用的理想選擇，這些功能包括設(shè)備測試和設(shè)計，及信號測試。行業(yè)應用可受益于其高精度，包括科學測量儀器，地質(zhì)監(jiān)測，資料分析，環(huán)境傳感，熱量測定，光電，光譜分析，結(jié)構(gòu)傳感應用和氣體探測，以及醫(yī)學設(shè)備，如心率監(jiān)視。USB-628x設(shè)備也是電子設(shè)計研究的理想選擇。 與典型多功能USB數(shù)據(jù)采集設(shè)備不同，NI M系列USB DAQ設(shè)備與NI信號流相結(jié)合，此專利技術(shù)通過USB提供多重雙向高速數(shù)據(jù)流。NI的信號數(shù)據(jù)流結(jié)合錯誤校準，噪音排除，功率管理和功率分布，產(chǎn)生一個靈活的，可靠的總線。如果沒有NI信號流技術(shù)，一個多功能數(shù)據(jù)采集設(shè)備僅能維持一個高速的數(shù)據(jù)流，有效控制一個單功能設(shè)備。 新USB-628x設(shè)備與NI-DAQmx驅(qū)動軟件,NI LabVIEW SignalExpress LE一起形成了一個相互的測量平臺，用于快速收集、分析和顯示數(shù)據(jù)。NI-DAQmx驅(qū)動器還提供節(jié)時性能，如同時產(chǎn)生LabVIEW圖形開發(fā)環(huán)境和文本語言代碼，如ANSI C/C++, C#, Visual Basic .NET和Visual Basic 6.0，超過了3000個測量案例，設(shè)備模擬和接線圖。 [FONT=times] original text [/FONT] [font=times][Color=#708090]NEWS RELEASE National Instruments today announced a new line of M Series USB data acquisition （DAQ） devices with 18-bit analog input accuracy at sampling rates up to 625 kS/s. To ensure accuracy at all available sampling rates, these devices incorporate the NI-PGIA 2 custom amplifier and NI-MCal self-calibration to minimize settling time and guarantee maximum accuracy. An onboard lowpass filter can be programmatically enabled to further improve measurement accuracy by eliminating high frequency noise. With the NI USB-628x devices, engineers can deliver an absolute accuracy of 980 µV at a range of ±10 V and 28 µV at a range of ±100 mV at a sampling rate of up to 625 kS/s. The USB-6281 features 16 single-ended （SE） or eight differential input （DI） analog input channels, two analog output channels and 24 digital I/O （DIO） channels, while the USB-6289 features 32 SE or 16 DI analog input channels, four analog output channels and 48 DIO channels. Both devices offer 18-bit analog inputs at up to 625 kS/s （500 kS/s when scanning） and 16-bit analog output at 833 kS/s. High-accuracy USB-628x devices also provide enhanced waveform generation. Engineers now can define custom offset and range settings for analog output and maximize the 16 bits of output resolution around a fixed DC offset to generate a more accurate representation of small signals and increase the accuracy of analog waveforms. High-accuracy NI M Series multifunction DAQ devices are ideal for applications including device test and characterization and for sensor and signal measurements requiring instrument-class accuracy. Applications that can now benefit from the higher accuracy include scientific instrumentation such as geological monitoring, materials analysis, environmental sensing, calorimetry, optics, spectroscopy, structural sensing and gas detection, along with medical device instrumentation such as heart rate monitoring. USB-628x devices are also ideal for electronics characterization and research. Unlike typical multifunction USB data acquisition devices, NI M Series USB DAQ devices incorporate NI signal streaming, a patent-pending technology that provides multiple bidirectional high-speed data streams over USB. NI signal streaming, combined with the error correction, noise rejection, power management and power distribution inherent to the USB protocol, yields a flexible, secure and reliable bus. Without NI signal streaming, a multifunction data acquisition device can sustain only a single high-speed data stream, effectively making it a single-function device. The new USB-628x devices are shipped with NI-DAQmx driver software and NI LabVIEW SignalExpress LE, an interactive measurement workbench for quickly acquiring, analyzing and presenting data without additional programming. The NI-DAQmx driver also provides time-saving features such as code generation for both the LabVIEW graphical development environment and text-based languages such as ANSI C/C++, C#, Visual Basic .NET and Visual Basic 6.0; more than 3,000 measurement examples; device simulation; and connection diagrams.[/color][/font]