Consumable temperature deepness section measuring system adopting fiber grating sensor

TL;DR: In this article, a consumable temperature deepness section measuring system adopting a fiber grating sensor is presented, in which the measurement errors caused by the estimation of the depth of the probe are avoided and the problems of fiber fracture and the like caused by overlarge fiber torsion in the probe descending process are solved.

Abstract: The invention discloses a consumable temperature deepness section measuring system adopting a fiber grating sensor. The measuring system comprises a consumable probe, an emitter and a demodulation recording unit, wherein the consumable probe comprises an upper fiber coil and a water sinking probe; the water sinking probe is formed by assembling a lower fiber coil and a sensor assembly in a streamline shell consisting of the head and the tail wing of the water sinking probe; the demodulation recording unit comprises a broadband light source, an FP (Fabry-Perot) filter, a photoelectric conversion module, a signal processing module and a power supply module; a fiber between the water sinking probe and the demodulation recording unit is taken as a signal transmission line; the water sinking probe adopts a double-fiber wound fiber; and the winding directions of fibers on the lower fiber coil and the upper fiber coil are opposite. The measuring system has the advantages that the problem of high cost of the consumable probe is solved; the fiber grating sensor is taken as a sensitive element, so that measuring errors caused by the estimation of the depth of the probe is avoided; and the probe adopts the double-fiber wound fiber, so that the problems of fiber fracture and the like caused by overlarge fiber torsion in the probe descending process are solved.