描述
NI PXI-4472B是一款专为声音与振动应用设计的高性能数据采集模块，适用于工业、科研及工程领域的动态信号测量。以下是其核心功能与技术参数的综合概述：
一、产品概述
总线类型：PXI（PCI扩展工业总线）兼容模块，支持与NI PXI系统无缝集成。
设计目标：针对振动、低频交流测量及高精度频域分析优化，适用于噪声诊断、机器状态监测、汽车NVH分析等场景。
二、核心参数
通道配置
-输入通道：8路同步模拟输入，支持±10 V或±31 V（通过SMB-120电缆）。
-采样率：最高102.4 kS/s（千样本/秒），支持低至0.5 Hz的极低频测量。
信号调理
-IEPE调理：集成电子压电（IEPE）信号调节功能，兼容加速度计、麦克风等传感器。
-耦合方式：软件可配置AC/DC耦合，灵活适应不同测量需求。
-抗混叠滤波器：自动调整采样率，确保频域测量准确性。
动态性能
-分辨率：24位ADC，动态范围达110 dB。
-截止频率：交流耦合模式下截止频率为0.5 Hz，适合低频振动分析。
三、功能特点
多设备同步
-通过RTSI总线实现多模块同步，通道间相位失真小于0.1度，支持高通道数扩展。
-支持与LabVIEW声音与振动工具包、阶次分析工具包集成，简化数据分析。
工业级可靠性
-宽温工作范围，防尘防震设计，适用于严苛环境。
-校准流程标准化，可通过NI Calibration Executive快速校准（约12分钟）。
灵活扩展
-支持与其他PXI模块（如模拟输出、数字I/O）组合，构建复杂测试系统。
-兼容LabVIEW、TestStand等软件平台，实现快速应用开发。
四、典型应用
工业检测：机器状态监测、设备故障诊断、轨道交通振动分析。
汽车工程：NVH（噪声、振动与声振粗糙度）测试、发动机性能评估。
科研实验：音频测试、低频振动特性研究、材料动态响应分析。
PXIE-8135
PNI800A
NI PXI-4472B is a high-performance data acquisition module designed for sound and vibration applications.It is suitable for dynamic signal measurement in industry,scientific research and engineering.The following is a comprehensive overview of its core functions and technical parameters:
I.Product Overview
Bus type:PXI(PCI Extended Industrial Bus)compatible module,supports seamless integration with NI PXI system.
Design goal:Optimized for vibration,low-frequency AC measurement and high-precision frequency domain analysis,suitable for noise diagnosis,machine condition monitoring,automotive NVH analysis and other scenarios.
II.Core parameters
Channel configuration
-Input channel:8 synchronous analog inputs,supporting±10 V or±31 V(via SMB-120 cable).
-Sampling rate:up to 102.4 kS/s(kilosamples/second),supporting very low frequency measurements as low as 0.5 Hz.
Signal conditioning
-IEPE conditioning:integrated electronic piezoelectric(IEPE)signal conditioning function,compatible with sensors such as accelerometers and microphones.
-Coupling mode:software-configurable AC/DC coupling,flexible to meet different measurement needs.
-Anti-aliasing filter:Automatically adjust the sampling rate to ensure the accuracy of frequency domain measurements.
Dynamic performance
-Resolution:24-bit ADC,dynamic range up to 110 dB.
-Cutoff frequency:The cutoff frequency is 0.5 Hz in AC coupling mode,which is suitable for low-frequency vibration analysis.
III.Features
Multi-device synchronization
-Multi-module synchronization is achieved through the RTSI bus,the phase distortion between channels is less than 0.1 degrees,and high channel count expansion is supported.
-Supports integration with LabVIEW Sound and Vibration Toolkit and Order Analysis Toolkit to simplify data analysis.
Industrial-grade reliability
-Wide temperature operating range,dust-proof and shock-proof design,suitable for harsh environments.
-Standardized calibration process,fast calibration through NI Calibration Executive(about 12 minutes).
Flexible expansion
-Supports combination with other PXI modules(such as analog output,digital I/O)to build complex test systems.
-Compatible with software platforms such as LabVIEW and TestStand to achieve rapid application development.
IV.Typical Applications
Industrial testing:machine status monitoring,equipment fault diagnosis,rail transit vibration analysis.
Automotive engineering:NVH(noise,vibration and harshness)testing,engine performance evaluation.
Scientific research experiments:audio testing,low-frequency vibration characteristics research,material dynamic response analysis.
