NI PXI-4351 185450D-01 Analog Input Module

High-Precision Signal Conditioning and Acquisition: Built-in 24-bit ADC supports bridge excitation and synchronous dynamic signal acquisition, meeting the measurement requirements for microvolt-level strain signals.

Multi-Channel Synchronous Measurement: 8 differential input channels support synchronous sampling, suitable for multi-point stress analysis (e.g., bridge and aerospace component monitoring).

Bridge Excitation and Compensation: Integrates 2.5V/5V/10V bridge voltage excitation, supports full-bridge/half-bridge/1/4-bridge configurations, and automatically compensates for temperature drift and bridge imbalance.

Industrial-Grade Reliability: Electromagnetic interference (EMI) resistance design ensures long-term stable operation in harsh environments.

Strain distribution monitoring for bridges, aircraft wings, and automotive chassis, analyzing deformation and stress concentration under load.

In tensile and compression tests of metal/composite materials, real-time acquisition of strain gauge signals and calculation of elastic modulus.

Pressure fluctuation measurement in hydraulic systems and pressure vessels (e.g., injection molding machines, pipeline pressure monitoring), combined with PID control for closed-loop regulation.

Vibration stress analysis of rotating equipment such as engines and motors, locating fault points through synchronous multi-channel strain signal acquisition.

Linearity verification of pressure and force sensor outputs, generating calibration coefficients with NI calibration software.

NI-DAQmx Driver: Provides a unified API supporting development environments like LabVIEW, Python, C++, and MATLAB, simplifying channel configuration and data acquisition processes.

NI MAX (Measurement & Automation Explorer): Used for hardware identification, channel self-test, and calibration parameter configuration.

SignalExpress: Code-free data acquisition software supporting real-time waveform display, data recording, and simple analysis.

Switch Module: Pair with the NI PXI-2597 multi-channel relay switch to expand to strain scanning measurement for hundreds of channels (e.g., large-scale structural monitoring networks).

Data Acquisition Module: Combine with the NI PXI-4472 dynamic signal acquisition card to synchronously record vibration acceleration and strain signals for multi-physical quantity coupling analysis.

Chassis Selection: Recommend using a PXI Express chassis (e.g., NI PXIE-1075) to transfer large amounts of strain data via a high-speed bus (up to 2 GB/s bandwidth).

3-Wire Connection: For long lead scenarios (>10 m), enable 3-wire bridge compensation to reduce errors introduced by lead resistance (≤0.1 Ω/m).

Anti-Aliasing Filtering: Set the low-pass filter cutoff frequency to 2 kHz based on the signal frequency (e.g., strain dynamic frequency <1 kHz) to avoid sampling aliasing.

Regular Calibration: Perform module self-calibration via NI MAX (recommended quarterly) to compensate for ADC drift and bridge excitation errors.