In the maintenance and inspection of fiber optic sensor systems, in addition to conventional maintenance and inspection techniques, specific functional inspections are also performed. Functional inspection techniques are established and easy to implement.
Maintenance and inspection are to confirm whether the measurement system is operating normally, grasp the state of deterioration and take measures (maintenance, measures to prevent deterioration, etc.) to keep the function functioning properly for a certain period of time. Periodic inspections are carried out annually or generally every three years, but this depends on the nature and frequency of failures of the components used, so please check.
Functional inspection as a sensor system includes maintenance and inspection techniques specific to fiber optic sensors. The maintenance and inspection techniques specific to fiber optic sensors are the same as those used for construction. We'll cover commonly used methods.
Measurement of Transmission Line Loss
OTDRs can be used to identify loss levels, locations, and breakpoints of anomalies in an optical fiber. In addition, when measuring from two directions, the influence of dead zones can be eliminated, and the state of transmission loss on all optical fiber lines can be grasped. Please use this function as it may be built into the measuring instrument.
Measurement of light intensity
Light is incident from one end of the fiber with an optical power meter, and the light intensity is measured on the exit end side to determine whether it is at a specified level. If the wire is broken or the multi-core fiber is wired incorrectly, the light intensity will be zero. An optical power meter with a light-emitting part and a light-receiving part can measure the insertion loss and reflection attenuation of the optical connector.
Identification of Cores The presence or absence of light in an optical fiber can be detected from the outside of the optical fiber by using a core classifier. Identify wiring errors in multi-core fibers. Measurement of the spectrum Using a spectrum analyzer, it is possible to grasp the deterioration state of the optical fiber sensor using the shift of the wavelength of light or the change of the intensity as detection means, and to find the cause. Deterioration of optical fibers used for transmission, used to measure spectra.
The specifics of maintenance and inspection, as well as the equipment and methods used, will vary depending on the fiber optic sensor system applied, so please consider it beforehand.
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