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NI PXIe-4844

Optical Sensor Interrogator for Fiber Bragg Gratings
  • 4 optical channels, 10 Hz full spectrum scan frequency, 1510 to 1590 nm wavelength range
  • FBG sensors are nonconductive, electrically passive, and immune to EMI
  • Daisy chain dozens of sensors on a single fiber over long distances (over 10 km)
  • Compatible with extrinsic Fabry-Perot, long-period grating (LPG), and other optical sensors
  • No external calibration required with onboard NIST-traceable reference
  • NI-OSI LabVIEW driver and NI-OSI Explorer for automatic sensor detection and configuration

Overview

The NI PXIe-4844 optical sensor interrogator is a dual-slot 3U PXI Express data acquisition module for fiber Bragg grating (FBG) optical sensors. It has four optical channels that are simultaneously sampled at 10 Hz for measurement of FBG strain and temperature sensors.

The NI PXIe-4844 features an optical core, which combines a high-power, low-noise swept wavelength laser with fiber Fabry-Perot tunable filter technology from Micron Optics. Each optical channel has an 80 nm wavelength range (1510 to 1590 nm), which can typically scan up to 20 FBG sensors per channel (more than 80 FBG sensors per module, depending on sensor range and sensitivity).

You can further extend the maximum number of FBG sensors per module by connecting one or more optical channels to an external optical multiplexer or by adding more NI PXIe-4844 modules in the same PXI chassis. The NI PXIe-4844 can also be integrated into the same chassis as other PXI modules for electrical data acquisition and control.

You configure the NI PXIe-4844 and FBG sensors in the NI-OSI Explorer, a configuration manager that scans the optical wavelength range to identify all connected FBG sensors. After you specify the range and scaling equations for each detected FBG, all scans automatically parse the channel data into individual sensor measurements and scale the data into appropriate engineering units. You can export this scaling configuration for use in the NI-OSI LabVIEW API.

The NI-OSI LabVIEW API has a similar look and feel to NI-DAQmx driver software. Data is returned as an array that you can directly wire to a LabVIEW chart to display scaled data in a value-versus-time format.

To learn more about the benefits of FBG technology and optical sensing, visit ni.com/opticalsensing.

Specifications

Specifications Documents

  • Specifications  
  • Data Sheet

Specifications Summary

General
Product Name PXIe-4844
Product Family Signal Conditioning
Form Factor PXI Platform
PXI Bus Type PXI Express
Part Number 781285-01
Operating System/Target Real-Time , Windows
LabVIEW RT Support Yes
Measurement Type Temperature , Strain/Bridge-based sensor , Optical Sensing
RoHS Compliant Yes
Counter/Timers
Counters 0
Shock and Vibration
Operational Shock 15
Random Operating Frequency Range 5 Hz , 100 Hz
Random Vibration 0.15 g
Physical Specifications
Width 4.1 cm
Minimum Operating Temperature 0 °C
Maximum Operating Temperature 55 °C
Minimum Storage Temperature -40 °C
Maximum Storage Temperature 70 °C

Pricing

NI PXIe-4844 Packages

To use the NI PXIe-4844 , you need all items in the diagram below. Select Option 1 if you already own a PXI System, or Option 2 if you do not already own a chassis, controller, or software.

Roll over the icons below to learn why you need each item in the system

PXI System
1 Adapter 1 Cable NI PXIe-4844 Chassis Controller Software
NI PXIe-4844 and Accessories Only
NI PXIe-4844 - 781285-01 Qty $ 16,999 each
Required Accessories
Adapter - Adapter
SNA-1224D0G Seiko Giken Wide Key FC/APC Bulkead Adapter (4 Pack) - 781768-01
Qty $ 40 each
Cable - Shielded
FC/APC to LC/APC Singlemode 0.5m Adapter Cable (4 Pack) - 152058-0R5
Qty $ 134 each
 
Optional Accessories Show
Estimated Shipping Days: 12 - 20
Package Price: $ 17,173
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Because FC/APC connectors are male, female to female bulkhead adapters are necessary to connect FC/APC optical sensor arrays to the FC/APC to LC/APC adapter cables.
You need FC/APC to LC/APC adapter cables to connect FC/APC optical sensor arrays to your optical sensor interrogator. Leaving the adapter cables on the instrument helps prevent wear and contamination of the interrogator's optical connectors.
The chassis provides rugged, modular housing for the controller and modules and contains the high-performance PXI backplane, which includes the system's data, timing, and triggering buses.
The controller runs your application and interfaces with your PXI modules.
You need software to interface with your hardware and to collect, analyze, present, and store your measurements. This board is compatible with a variety of programming languages, including LabVIEW, C/C++, Visual Basic, and .NET. LabVIEW provides the easiest integration with all of your NI hardware and is recommended to maximize your hardware investment.

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Resources

Additional Product Information

  • Manuals  (5)
  • Dimensional Drawings  
  • Product Certifications  
Data Sheet