Vehicle durability and crash testing depend on knowing where strain develops, how loads move and what changes during an impact. Traditional point sensors can provide accurate readings at selected locations, but they leave gaps between those locations. Distributed sensing gives you a different view by turning an optical fiber into a continuous measurement path. For automotive test labs, this can mean fewer instrumentation steps, more measurement coverage and better visibility into chassis, seat and body component behavior during demanding tests.
What is distributed fiber optic sensing?
Distributed optical fiber sensing uses an optical fiber as a continuous sensing medium, allowing measurements at many closely spaced locations along its length. Instead of installing separate gauges and wires for every measurement point, distributed sensing can capture strain and temperature across a single fiber. Sensuron’s DFOS systems can provide thousands of sensing points, giving you a more detailed view of how a vehicle component responds to applied loads. This makes the technology useful for chassis testing, fatigue analysis, crash testing and model validation.
How Can Automotive Test Labs Reduce Chassis Strain Gauge Setup Time?
Reduce Instrumentation Work Before Testing
Automotive test labs can reduce instrumentation time by replacing large arrays of individually installed strain gauges with optical sensing fibers. Traditional setups require surface preparation, gauge placement, adhesive bonding, wiring and soldering at each measurement location. That work can take days across a vehicle prototype.
Install Sensing Fibers in Less Time
Our distributed fiber optic sensing fibers can be installed in less than one-third of the time required for traditional point-sensing setups in automotive applications. A single fiber can also provide thousands of virtual measurement points without requiring separate wiring for each location.
Spend More Time Testing the Vehicle
For road load simulator testing or prototype validation, this means your team can spend less time preparing the vehicle and more time collecting test data. The same sensing setup can also support different tests on the vehicle, reducing the need to repeatedly instrument the same areas.
What Can You See When Measurements Cover the Vehicle More Densely?
Dense measurement coverage can show changes that point sensors may leave between measurement locations. For vehicle testing, the difference becomes clearer when you compare where each method can provide information.
| Test application | Point-based measurement | Distributed sensing | Engineering value |
| Chassis rigidity | Strain at selected locations | Continuous strain along the sensing fiber | See how loads move across the chassis |
| Crash impact | Readings at fixed gauge locations | Closely spaced strain measurements | Identify localized stress concentrations |
| Seat deflection | Measurements at selected points | Continuous deformation and shape information | Track broader seat frame response |
| Body panels | Isolated strain readings | Distributed surface strain | Examine deformation across larger areas |
A single optical fiber can act as thousands of virtual strain gauges along a vehicle frame. Our systems can generate up to 2,048 adjacent virtual sensing points per channel, with up to 16,384 virtual sensors across eight channels.
How Does the RTS250+ Help Capture High-Speed Crash Events?
The Sensuron RTS250+ is designed for dynamic vehicle testing where rapid changes in strain and load matter. It can acquire data at rates up to 200 Hz across four optical channels or 100 Hz across eight channels.
That capability gives you distributed strain and temperature measurements during high-speed testing while maintaining the same sensing platform for static and dynamic work. With spatial resolution as fine as 1.6 mm through a custom order, the system can reveal localized changes that widely spaced gauges may not capture.
The RTS250+ also weighs 13.6 pounds, making it practical for test environments where instrumentation size and added mass matter.
CTA: See how it supports high-speed vehicle testing. Explore RTS250+
How Should You Evaluate a Continuous Sensing System?
Start with the measurements your test requires, then evaluate the distributed sensing system against those requirements. For automotive durability and crash testing, consider four factors:
- Measurement density: Determine whether selected points are enough or whether you need continuous coverage.
- Acquisition rate: Match sampling speed to the loads, impacts and vibrations you need to capture.
- Installation time: Consider how much preparation each prototype requires before testing.
- Data requirements: Check whether strain, temperature, deflection, shape or several measurements are needed together.
Get Better Insights on What Happens During Vehicle Testing
For automotive test engineers, understanding “what is distributed fiber optic sensing” means seeing how an optical fiber can provide dense measurement coverage across a component. This broader view helps you identify localized behavior, understand load distribution and capture more useful data during chassis durability, crash testing and model validation.
FAQs
How does DFOS eliminate instrumentation setup issues in automotive chassis testing?
DFOS replaces many individually installed gauges and wired connections with sensing fiber. Automotive systems from Sensuron can be installed in less than one-third the time of traditional point-sensing setups, reducing preparation before durability and crash tests.
Why can copper strain gauge wiring affect vehicle testing?
Copper wiring adds weight and can influence lightweight test components. Our optical fibers are much lighter and do not require the same wiring harnesses, helping you measure vehicle behavior without adding substantial instrumentation mass.
How many virtual sensors can your RTS250+ system provide?
Our RTS250+ can provide up to 16,384 virtual sensors across eight optical channels. Each channel can generate up to 2,048 adjacent sensing points, giving you dense measurement coverage across vehicle components.