Description

NI  SCXI-1141  high-performance signal conditioning module

Performance characteristics
Eight-channel synchronous processing
It supports 8 differential input channels and can simultaneously collect multiple dynamic signals, making it suitable for multi-sensor synchronous monitoring scenarios (such as multi-measurement point data acquisition in vibration testing).
High-precision filtering system
Eighth-order elliptical filter: It offers a steep roll-off characteristic (attenuation rate up to 135dB/octave), effectively suppressing out-of-band noise.
The software programmable cut-off frequency supports 10,000 discrete setting points within the range of 10Hz to 25kHz, and the filtering parameters can be precisely configured according to the signal characteristics.

Wide gain range and input dynamics
Gain setting: Supports three programmable gain levels of 1, 10, and 100, adapting to input signals of different amplitudes (such as millivolt-level strain signals or volt-level voltage signals).
Input range: ±50mV to ±5V, capable of handling various inputs ranging from weak sensor signals to strong voltage signals.

High sampling rate and low noise
Maximum sampling rate: 333kS/s (per channel), supporting high-speed dynamic signal acquisition.
Low-noise design: The background noise is as low as a few microvolts, ensuring the precise measurement of weak signals.

Application scenarios
Vibration and acoustic analysis
Connect an accelerometer or microphone to collect mechanical vibration or acoustic signals for fault diagnosis (such as bearing wear detection) or noise source location.
Strain measurement
It is used in conjunction with strain gauges to measure structural stress and is suitable for structural health monitoring of Bridges, aerospace components, etc.
Dynamic stress test
Process the high-frequency signals output by pressure sensors, such as engine combustion pressure or fluid dynamics tests.
Power electronics monitoring
Monitor the high-frequency voltage/current fluctuations of power equipment and evaluate the power quality or the performance of switching devices.
Scientific research experiment
In fields such as material mechanics and biomedicine, it is used to collect rapidly changing physical signals (such as muscle electrical signals and material fatigue test data).