How can one interrogator simultaneously read temperature, strain, pressure, and displacement sensors?
An interrogator can simultaneously read various types of Fiber Bragg Grating (FBG) sensors, such as temperature, strain, pressure, and displacement, because all these sensors operate on the fundamental principle of wavelength shifts. Each physical quantity induces a specific and measurable change in the Bragg wavelength of the FBG.
As long as the individual FBG sensors for different physical quantities are designed with distinct, non-overlapping Bragg wavelengths within the interrogator’s operating range, the interrogator can distinguish and measure the shifts from each sensor independently. This allows for synchronous acquisition of multiple physical parameters on a single fiber, or multiple fibers connected to the interrogator.
OFSCN offers the OFSCN® Fiber Bragg Grating Interrogator for such applications. You can view its standard product image here:
For example, here are images of an OFSCN Alloy Tube Packaged Fiber Bragg Grating strain sensor and an OFSCN® Fiber Bragg Grating Displacement Sensor:
For more details on the interrogator, please visit: https://www.ofscn.net/fbg-products/analyzer.html