Product Introduction
Земля NI-9231 is a 4-channel C Series dynamic signal acquisition module designed for sound, vibration, and acoustic measurement applications. It provides direct connection to IEPE accelerometers, microphones, and other dynamic sensors with integrated signal conditioning and high-resolution analog acquisition.
Featuring 24-bit ADC resolution, simultaneous sampling, built-in IEPE excitation, and anti-aliasing filtering, the NI-9231 delivers accurate dynamic measurements for machine monitoring, structural testing, automotive validation, and laboratory analysis.
Product Overview
Земля NI-9231 belongs to the NI C Series dynamic signal acquisition family and provides four analog input channels optimized for IEPE sensor measurement.
Each channel includes integrated current excitation for IEPE sensors, allowing direct connection of vibration accelerometers and acoustic sensors without external signal conditioning hardware. The module provides simultaneous sampling across channels to maintain accurate phase relationships during dynamic measurements.
Compatible with CompactDAQ and CompactRIO platforms, the NI-9231 integrates with NI-DAQmx, LabVIEW, FlexLogger, and other NI software environments for scalable sound and vibration measurement systems.
Key Features
4-Channel IEPE Dynamic Signal Input
The NI-9231 provides four channels for direct measurement from IEPE-based sensors.
- 4 analog input channels
- IEPE sensor compatibility
- Dynamic signal acquisition
- Accelerometer measurement
- Microphone measurement
Advantage: Enables direct connection of common industrial vibration and acoustic sensors.
24-Bit High-Resolution ADC
The NI-9231 uses high-resolution analog conversion technology for accurate dynamic measurements.
- 24-битное разрешение АЦП
- High dynamic range
- Low-noise signal acquisition
- Accurate waveform reproduction
- Precision vibration measurement
Advantage: Captures small amplitude changes in vibration and acoustic signals with high accuracy.
51.2 kS/s Per Channel Sampling
The module supports high-speed simultaneous acquisition for dynamic signal analysis.
- 51.2 kS/s per channel
- Синхронная выборка
- Hardware-timed acquisition
- Transient signal capture
- Frequency analysis support
Advantage: Provides accurate measurement of vibration, noise, and dynamic mechanical behavior.
Integrated IEPE Current Excitation
The NI-9231 includes built-in excitation for powered IEPE sensors.
- Integrated IEPE current source
- Direct sensor connection
- No external conditioner required
- Simplified system wiring
- Reduced hardware complexity
Advantage: Reduces system cost and installation complexity for vibration measurement applications.
AC/DC Coupling Support
Flexible coupling options allow measurement of different signal types.
- AC coupling for dynamic signals
- DC coupling for static measurements
- Flexible sensor configuration
- Expanded application range
- Improved measurement flexibility
Advantage: Supports both vibration analysis and general voltage-based measurements.
Anti-Aliasing Filtering
The NI-9231 includes integrated filtering for improved signal quality.
- Built-in anti-aliasing filters
- Signal conditioning
- Improved frequency accuracy
- Reduced measurement errors
- Reliable dynamic analysis
Advantage: Improves accuracy during frequency-domain analysis and vibration testing.
Channel-to-Earth Isolation
Electrical isolation improves measurement reliability in industrial environments.
- Изоляция канала от земли
- Reduced ground loops
- Improved noise immunity
- Sensor protection
- Industrial deployment capability
Advantage: Provides stable measurements in electrically noisy environments.
Compact C Series Architecture
The NI-9231 integrates into modular CompactDAQ and CompactRIO systems.
- C Series modular format
- Compact installation
- Flexible chassis expansion
- Mixed I/O system support
- Scalable measurement platforms
Advantage: Allows engineers to build customized vibration and acoustic measurement systems.
Technical Specifications
| Параметр | Описание |
|---|---|
| Product Type | C Series Dynamic Signal Acquisition Module |
| Number of Channels | 4 Analog Inputs |
| ADC Resolution | 24 Bits |
| Maximum Sampling Rate | 51.2 kS/s per Channel |
| Input Type | IEPE Analog Input |
| Sensor Support | IEPE Accelerometers, Microphones, Dynamic Sensors |
| Excitation | Integrated IEPE Current Excitation |
| Coupling | AC/DC Coupling |
| Filtering | Anti-Aliasing Filters |
| Изоляция | Channel-to-Earth Isolation |
| Supported Platforms | CompactDAQ and CompactRIO |
| Driver | НИ-DAQmx |
| Programming Support | LabVIEW, FlexLogger, Python, C/C++, C#, .NET |
Software Ecosystem
The NI-9231 integrates with NI software tools for vibration, acoustic, and dynamic measurement applications.
- NI-DAQmx: Provides configuration, acquisition, timing, and sensor measurement support.
- LabVIEW: Enables vibration analysis, sound measurement, and automated testing applications.
- FlexLogger: Provides configuration-based dynamic data acquisition.
- NI MAX: Supports hardware configuration and diagnostics.
- DIAdem: Provides engineering data analysis and reporting.
- Python, C/C++, C#, .NET: Supports custom measurement software development.
Industries
- Automotive Testing
- Аэрокосмическая и оборонная промышленность
- Промышленная автоматизация
- Мониторинг состояния оборудования
- Structural Engineering
- Acoustic Research
- Энергетические системы
- Исследовательские лаборатории
Applications
Vibration Monitoring
The NI-9231 provides accurate vibration acquisition for mechanical systems.
- Machine health monitoring
- Bearing analysis
- Rotating equipment testing
- Предиктивное обслуживание
Sound and Acoustic Testing
The module supports acoustic measurement using compatible IEPE microphones and sensors.
- Noise testing
- Sound quality analysis
- Acoustic research
- Environmental noise monitoring
Automotive Testing
Dynamic signal acquisition supports vehicle and component validation.
- Engine vibration testing
- Road noise analysis
- Component durability testing
- Vehicle NVH testing
Structural Testing
The NI-9231 can be used for dynamic structural measurements.
- Modal analysis
- Impact testing
- Structural vibration analysis
- Испытание материалов
Comparison with Similar Products
| Модель | Основное различие | Best Application |
|---|---|---|
| NI-9231 | 4-channel IEPE dynamic signal acquisition module with 24-bit ADC. | Vibration and acoustic measurement |
| NI-9232 | Dynamic signal module optimized for sound and vibration applications. | General IEPE measurement |
| NI-9234 | Higher-performance IEPE module designed for advanced vibration analysis. | High-frequency vibration testing |
| NI-9233 | 4-channel IEPE vibration input module for dynamic measurements. | Machine vibration monitoring |
Recommended Related Products
| NI cDAQ-9185 | Ethernet CompactDAQ chassis for distributed dynamic measurement systems. |
| NI cRIO-9056 | CompactRIO controller supporting C Series dynamic signal modules. |
| NI-9234 | High-performance IEPE vibration acquisition module. |
| NI-9237 | Bridge input module for strain, force, torque, and pressure measurement. |
Why Choose NI-9231?
- 4-channel IEPE dynamic signal acquisition
- 24-bit high-resolution ADC
- 51.2 kS/s per channel sampling
- Integrated IEPE excitation
- AC/DC coupling support
- Anti-aliasing filtering
- Изоляция канала от земли
- Compact C Series architecture
- Compatible with CompactDAQ and CompactRIO
- Ideal for vibration and acoustic testing
Frequently Asked Questions
What sensors can NI-9231 support?
The NI-9231 supports IEPE-based sensors including accelerometers, microphones, and other dynamic measurement devices.
What is the difference between NI-9231 and NI-9237?
The NI-9231 is designed for IEPE dynamic sensors such as vibration accelerometers, while the NI-9237 is designed for bridge-based sensors such as strain gauges and load cells.
Can NI-9231 be used with CompactRIO?
Yes. The NI-9231 is compatible with supported CompactRIO controllers and CompactDAQ chassis using the C Series architecture.
Заключение
Земля NI-9231 4-channel C Series dynamic signal acquisition module provides high-resolution IEPE sensor measurement with integrated excitation, simultaneous sampling, and advanced signal conditioning. It is an ideal solution for vibration analysis, acoustic testing, machine monitoring, automotive validation, and structural measurement systems based on CompactDAQ and CompactRIO platforms.
