描述
NI PCI-4462是一款专为声音和振动应用设计的高精度数据采集板卡，以下是其产品详情：
基本信息
品牌：National Instruments（NI）
产品类型：数据采集卡
技术参数
分辨率：24位sigma-delta模数转换器。
采样率：最高可达204.8kS/s。
输入通道：4个模拟输入通道。
动态范围：118dB。
增益设置：6个可编程增益设置，增益范围为-20dB至+30dB，以10dB为步长，对应输入范围从±0.316V至±42.4V。
输入耦合：软件可配置AC/DC耦合，AC耦合时转折频率为3.4Hz。
IEPE调理：软件可选IEPE电流激励，电流值为0mA、4mA±15%或10mA±15%，每个通道独立可选。
触发功能：支持多种触发方式，包括软件触发、硬件触发、定时触发等。
工作温度范围：0°C至45°C。
尺寸：107.95mmx168.4mm或229mmx122mmx21mm。
电源要求：输入阻抗为1MΩ，偏置电流为240pA。
功能特点
高精度测量：24位分辨率和118dB的动态范围，能够精确采集振动信号和声学信号。
多通道同步采集：支持四通道同时采集，提高数据采集效率，可用于同时监测多个点的振动或声音信号。
灵活配置：用户可根据需要配置输入范围、增益、耦合方式等，适应不同的测量场景和传感器类型。
抗混叠滤波：内置抗混叠滤波器，防止信号混叠，确保采集数据的准确性。
软件支持：兼容LabVIEW、C/C++等多种编程语言，方便用户进行编程和数据分析，还可搭配LabVIEW声音与振动工具包等进行更专业的分析。
应用领域
音频测试：用于音频设备的性能测试和音质分析。
汽车测试：进行汽车部件的噪声、振动和声振粗糙度（NVH）测试，提升汽车乘坐舒适性。
机器状态监测：监测机械设备的振动状态，进行故障诊断和预测性维护，保障设备正常运行。
结构健康监测：监测桥梁、建筑等结构的振动响应，评估结构的健康状况。
The NI PCI-4462 is a high-precision data acquisition board designed for sound and vibration applications.Here are its product details:
Basic Information
Brand:National Instruments(NI)
Product Type:Data Acquisition Card
Technical Specifications
Resolution:24-bit sigma-delta analog-to-digital converter.
Sampling Rate:Up to 204.8 kS/s.
Input Channels:4 analog input channels.
Dynamic Range:118 dB.
Gain Settings:6 programmable gain settings,ranging from-20 dB to+30 dB in 10 dB steps,corresponding to an input range of±0.316 V to±42.4 V.
Input Coupling:Software-configurable AC/DC coupling;cutoff frequency of 3.4 Hz for AC coupling.
IEPE Conditioning:Software-selectable IEPE current excitation with current valuesof 0mA,4mA±15%,or 10mA±15%,independently selectable for each channel.
Trigger Function:Supports multiple triggering methods,including software triggering,hardware triggering,and timed triggering.
Operating Temperature Range:0°C to 45°C.
Dimensions:107.95mm x 168.4mm or 229mm x 122mm x 21mm.
Power Requirements:Input impedance 1MΩ,bias current 240pA.
Features:
High-Precision Measurement:24-bit resolution and 118dB dynamic range enable accurate acquisition of vibration and acoustic signals.
Multi-Channel Synchronous Acquisition:Supports simultaneous acquisition of four channels,improving data acquisition efficiency and allowing simultaneous monitoring of vibration or sound signals from multiple points.
Flexible Configuration:Users can configure input range,gain,coupling method,etc.,to adapt to different measurement scenarios and sensor types.
Anti-aliasing Filter:Built-in anti-aliasing filter prevents signal aliasing,ensuring the accuracy of acquired data.
Software Support:Compatible with multiple programming languagessuch as LabVIEW and C/C++,facilitating programming and data analysis.It can also be used with the LabVIEW Sound and Vibration Toolkit for more professional analysis.
Application Areas:
Audio Testing:Used for performance testing and sound quality analysis of audio equipment.
Automotive Testing:Conducts noise,vibration,and acoustic harshness(NVH)testing on automotive components to improve ride comfort.
Machine Condition Monitoring:Monitors the vibration status of mechanical equipment,enabling fault diagnosis and predictive maintenance to ensure normal equipment operation.
Structural Health Monitoring:Monitors the vibration response of structures such as bridges and buildings to assess structural health.
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