Luna ODiSI 6004 4-Channel Optical Distributed Sensor Interrogator (ODiSI 6000 Series)

Four-channel ODiSI 600x distributed sensor interrogator that measures strain and temperature along optical fiber with a 5.2 mm gage pitch.

Number of channels: 4
Gage pitch: 5.2 mm
Gages (measurement locations) per meter of sensor: 192
Max measurement rate: 30 Hz

Datasheet

Overview

The Luna ODiSI 6004 is the four-channel configuration of the ODiSI 600x models in the ODiSI 6000 Series of optical distributed sensor interrogators. The system measures strain and temperature along low-cost, unaltered optical fiber sensors by measuring Rayleigh backscatter, providing distributed strain and temperature profiles along each sensor. Luna lists the ODiSI 6000 Series as discontinued, with the ODiSI 7100 Series named as its replacement.

The ODiSI 600x models measure strain or temperature with a standard gage pitch of 5.2 mm, at a maximum measurement rate of 30 Hz. They work with high-definition (HD) Rayleigh strain and temperature sensors and with continuous fiber grating (CFG) sensors. With the optional Extended Range Remote Modules, each channel supports sensors up to 100 m long as well as HD-SC strain-compensated temperature sensors.

System and software

The system includes the mainframe, an instrument controller laptop running the ODiSI application software, and one standoff cable and standard-length remote module per channel. The software identifies and configures sensors, displays real-time data plotted against length or time, and logs, replays and exports measurement data. Data can be streamed in real time to a file or over TCP-IP to another computer. ODiSI Remote software for Windows and Linux provides remote control and viewing, and the optional 3DViz software maps data onto 3D CAD models or 2D images.

Integration and reliability

Integration features include IEEE 1588 PTP network time synchronization, a JSON-based digital streaming data format, a TTL sync output pulse, and start and stop triggering. Optical alignment and calibration run continuously with every scan without user intervention, and strain sensors are calibrated with NIST-traceable fixtures.

Key Features

Four-channel ODiSI 600x configuration
Distributed strain and temperature sensing based on Rayleigh backscatter in optical fiber
Gage pitch of 5.2 mm
Maximum measurement rate of 30 Hz
Up to 100 m of sensing fiber per channel with Extended Range Remote Modules
Compatible with HD strain and temperature sensors, HD-SC strain-compensated temperature sensors and CFG sensors
Passive, corrosion-resistant, dielectric sensors that can be installed in bends and corners or embedded in materials
No drift or recalibration of sensors, cycle counts >10^7
Continuous optical alignment and calibration with every scan
Real-time data streaming over Ethernet and remote access through thin-client software
IEEE 1588 PTP network time synchronization
JSON-based digital streaming data format
Sync output TTL pulse and start/stop triggering

Specifications

System Configuration

Number of channels	4 ODiSI 600x models are offered as ODiSI 6001/2/4/8 with 1, 2, 4 or 8 channels
Gage pitch	5.2 mm ODiSI 600x models; gage pitch is the distance between centerpoints of consecutive gages
Gages (measurement locations) per meter of sensor	192 At 5.2 mm gage pitch
Max measurement rate	30 Hz
High-Definition (HD) strain and temperature sensor compatibility	Yes
Strain-compensated temperature sensor compatibility	Yes Requires Extended Range Remote Modules
Continuous Fiber Grating (CFG) sensor compatibility	Yes CFG mode requires Luna CFG sensors
Data interface	Ethernet

Sensor and Cable Lengths

Maximum sensor length per channel, standard mode	20 m
Maximum sensor length per channel, extended range	100 m Sensor lengths longer than 20 m require optional Extended Range Remote Modules
Maximum CFG sensor length per channel	15 m With Standard Remote Modules
Standoff cable length	10, 50, 100, 150 or 200 m Standard lengths of 10, 50 and 100 m; two cables can be combined to form 150 and 200 m
Maximum patch cord length	Up to 19 m (depending on sensor length) Patch cord plus active sensor fiber must not exceed 20 m (Standard) or 100 m (Extended Range) per channel

Measurement Rates (HD Sensors, 5.2 mm Gage Pitch)

2.5 m mode	30 Hz Rates are aggregate; divide by number of active channels for the per-channel rate
5 m mode	20 Hz Aggregate rate
10 m mode	12.5 Hz Aggregate rate
20 m mode	6.3 Hz Aggregate rate
50 m mode	2.5 Hz Aggregate rate
100 m mode	1 Hz Aggregate rate

Strain Measurement (HD Sensors, 5.2 mm Gage Pitch)

Strain measurement range	±15,000 µϵ
Resolution	0.1 µϵ
Instrument accuracy	±1 µϵ
System (instrument and sensor) accuracy	±30 µϵ Compared to NIST-traceable extensometer measurements; includes errors from ODiSI instrument and Luna strain sensors
Measurement uncertainty	±2 µϵ At zero and across the full strain range; twice the standard deviation of 1000 measurements
Dynamic loading rate	5 Hz

Temperature Measurement (HD Sensors, 5.2 mm Gage Pitch)

Temperature measurement range	-40 to 200 °C (with standard Luna sensors) With standard temperature sensors (HD6T and HD6SCT); wider range available with other sensor fiber
Temperature measurement resolution	0.1 °C
Temperature measurement uncertainty	±0.6 °C Twice the standard deviation of 1000 measurements

Continuous Fiber Grating (CFG) Mode

Gage pitch	6 mm Requires Luna CFG sensors
Gages per meter of sensor	166
Measurement rate, 2.5 m / 5 m / 10 m / 20 m mode	62.5 Hz / 40 Hz / 25 Hz / 12.5 Hz Aggregate rates
System (instrument and sensor) accuracy	±30 µϵ Accuracy and uncertainty specifications for CFG sensors are preliminary
Measurement uncertainty	±5 µϵ Preliminary
Temperature measurement uncertainty	±1.0 °C Preliminary

Strain-Compensated Temperature Mode

Gage pitch	1.04 cm Requires Luna HD-SC temperature sensors and Extended Range Remote Modules
Measurement rate (all lengths)	2.5 Hz
Resolution	0.1 °C
Measurement uncertainty	±0.9 °C
Strain compensation	Over an applied strain range of 0 to 1800 µϵ, measurement accuracy is ± 2.8 °C RMS error with the HD-SC sensor under axial strain; includes effects of the ODiSI interrogator

Environmental and Physical

Class 1 laser	<10 mW
Operating temperature range — mainframe and controller	5 to 40 °C
Operating temperature range — standoff cable and remote module	5 to 60 °C
Storage temperature range	0 to 40 °C
Operating and storage relative humidity	10 to 90 % RH Non-condensing
Operating altitude	-15 to 3,000 m
Dimensions — mainframe (W x D x H)	34 x 35 x 11 cm
Dimensions — laptop controller (W x D x H)	36 x 24 x 1.7 cm
Weight (mainframe and controller)	17 lb (7.8 kg)
Power (mainframe and controller)	160 W

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.

Applications

High fidelity model verification
Temperature mapping for batteries
Improving bonding and welding quality
Embedded sensors for smart parts
Strain characterization of new materials and complex structures
In-situ temperature profiling of critical processes
Two- and three-dimensional strain field measurement for FE model validation
Evaluation of multi-material joining
Detection of small cracks and defects in critical structures
Strain measurements on and in composite materials

Included

Mainframe with 4 channels
Instrument controller laptop
ODiSI application software
One standoff cable for each channel
One standard length remote module for each channel

Options & Accessories

Option	Description
OP06150	Extended Range Remote Module — Remote module supporting extended sensor lengths of 50 m and 100 m, in addition to standard sensor lengths and strain-compensated temperature (HD-SC) sensors.
OPT06100-R	Rack Mount Controller Option — Rack mount (1U) instrument controller (substituted for laptop).
OPT06020	USB-3106 Analog Output — 16-channel analog output module for ODiSI (voltage or current outputs).
OPT06125	3Dviz - 3D/2D Visualization Software — Visualization software for mapping real-time or saved ODiSI data onto 3D models and 2D images. Compatible with Windows OS.
OPT06123	3Dviz - 2D Visualization Software — Visualization software for mapping real-time or saved ODiSI data onto 2D images. Compatible with Windows OS.