Double-turning funnel type optical fiber grating rainfall sensor with temperature self-compensation characteristic

Abstract

The invention discloses a double-turning funnel-type optical fiber grating rain sensor with temperature self-compensation characteristics, which belongs to the technical field of optical fiber sensing and includes a rain collection device. A double-turning funnel is arranged below the rain-collecting device, and the double-turning funnel passes through the central shaft and the funnel bracket. Connected, symmetrically set equal-strength cantilever beams under both sides of the double-turning funnel, and respectively set the first sensitive element fiber grating and the second sensitive element fiber-optic grating on the lower surface of the equal-strength cantilever beam; The deflection of the free end of the cantilever beam changes, which in turn causes the center wavelength of the first sensitive element fiber grating and the second sensitive element fiber grating to drift, and the measured rainfall information is obtained by inverting and analyzing the center wavelength drift data. The present invention generally adopts a symmetrical design of paired double structures, which effectively improves the service life and robustness of the sensor, realizes high-precision rainfall measurement with self-temperature compensation, and has good practicability.

Description

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AI Technical Summary

Benefits of technology

The present inventor's rain sensors have several benefits that make them better than previous designs by having automatic adjustment capabilities at certain temperatures or frequencies. They use an optical fibre gratings instead of traditional methods like bending light beams into two different directions. This allows signals from these gratings to pass through without being affected by external factors such as wind speed. Additionally, they can measure both low levels (<1°) and very fine weather conditions accurately due to their ability to detect small changes caused by precipitation on topography. Overall, this technology makes rain measurements more accurate over time while also reducing difficulties associated with analyzing data collected during long periods of non-wetting operation.

Problems solved by technology

The technical problem addressed by this patented technology relates to improving upon existing methods for measuring rainwater levels due to their low cost, ease of use, durable design features, easy maintenance or replacement, and ability to withstand high temperatures without losing accuracy over time.

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