How do 4, 8, or 16-channel interrogators ensure that data from all channels is aligned on the time axis?
For multi-channel OFSCN® Fiber Bragg Grating Interrogators (such as 4, 8, or 16-channel systems), ensuring data from all channels is aligned on the time axis is critical for accurate measurements. This is typically achieved through a synchronous sampling mechanism integrated into the interrogator’s design.
The core principle involves using a single, unified clock source to control the data acquisition process across all measurement channels. When the interrogator performs a scan or takes a sample, it triggers all active channels simultaneously, or with a precisely controlled and known delay, referencing this master clock. This ensures that the wavelength data collected from each FBG sensor at any given timestamp corresponds to the same moment in time.
This synchronized operation allows for accurate correlation of events or changes observed across different sensing points, which is essential for applications requiring spatio-temporal analysis of strain, temperature, or other parameters.
OFSCN® Fiber Bragg Grating Interrogators are available with 4, 8, 16 channels, with 32 channels customizable, supporting various data sampling frequencies.
Here is a standard image of the interrogator:
You can find more details on our website: OFSCN® Fiber Bragg Grating Interrogator.
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