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NI USB-4431是一款5通道USB動態(tài)信號采集模塊，用于通過集成電路壓電式(IEPE)與非集成電路壓電式(IEPE)傳感器進行高精度聲音和振動測量。 USB-4431的四路通道具有針對傳感器的信號調(diào)理功能。 第五路通道是一個模擬輸出通道。

該模塊具有多路模擬輸入(AI)通道，采樣率范圍從1 S/s到102.4 kS/s，且所有AI通道同時進行采樣。 USB-4431的AI通道具有100 dB動態(tài)范圍，且每個AI通道具有用于加速度計和麥克風的軟件可選式交流/直流耦合與IEPE信號調(diào)理。 這些通道還可兼容IEEE 1451.4 (TEDS)傳感器，以實現(xiàn)傳感器即插即用功能。

模擬輸出(AO)通道是激勵-響應測試的理想之選，可同步至AI通道。 AO通道還具有zui高96 kS/s的更新速率和89 db的動態(tài)范圍。

*使用的軟件
NI聲音與振動分析軟件（包括：NI聲音和振動測量套件及NI聲音與振動工具包）提供信號處理功能，適合噪聲、振動和聲振粗糙度(NVH)應用。 NI分析軟件包括NI聲音與振動助手交互式軟件，用于快速采集、分析并記錄聲學、噪音和振動數(shù)據(jù)。 借助靈活且基于配置的測量庫和開放式分析功能，聲音與振動助手能夠通過基于軟件的*測量來快速捕捉數(shù)據(jù)，進而創(chuàng)建自定義應用程序。

• 4路模擬輸入通道；±10 V；102.4 kS/s同步采樣率
• 單路模擬輸出通道；±3.5 V；96 kS/s更新速率
• 24位分辨率，可使模擬輸出(AO)和模擬輸入(AI)通道獲得良好的信噪比
• 軟件可選的IEPE信號調(diào)理（0 mA或2.1 mA）
• 可溯源至NIST的校準
• 便攜式USB供電設備

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