Precision Measurement; High Resolution, High Frequency Response, Non-contact; Measurement of Displacement, Vibration, and Position.
The fiber optic displacement sensing system is a sensor system that transforms the state of the measured object into measurable optical signals. The working principle of the fiber optic displacement sensing system involves directing a light beam from a light source into a modulator through optical fibers. Within the modulator, the interaction with the external measured parameters causes changes in the optical properties of light, such as intensity, wavelength, frequency, phase, polarization state, etc., resulting in a modulated optical signal. The modulated signal is then transmitted through optical fibers to a photodetector and, after demodulation, provides information about the measured parameters. Throughout this process, the optical beam is guided through optical fibers, serving both to transport the light beam and to act as the light modulator.
Fiber optics exhibit numerous excellent properties, such as resistance to electromagnetic and atomic radiation interference, mechanical characteristics of being thin, flexible, and lightweight, electrical properties of insulation and non-induction, and chemical properties of water resistance, high-temperature resistance, and corrosion resistance. Fiber optics can operate in places inaccessible to humans (such as high-temperature areas) or in areas harmful to humans (such as nuclear radiation zones). They act as sensory extensions beyond human physiological limits, capturing external information that human senses cannot perceive.
