Multi-parameter landslide monitoring device and method based on weak grating

Abstract

The invention discloses a multi-parameter landslide monitoring device and method based on a weak grating, and the device comprises a multi-parameter fiber optic sensor, a weak grating demodulator anda power supply device, wherein the multi-parameter fiber optic sensor is a whole sensing optical cable, which includes a weak grating water level sensor, a weak grating inclination sensor, a weak grating rope sensor and a weak grating water pressure sensor, that are located at the tail end and connected in series, and a stress strain sensing cable located at the front end; the weak grating demodulator is used to demodulate wavelength change information in the multi-parameter fiber optic sensor and transmit information externally by wired or wireless means; and the power supply device is used to supply power to the weak grating demodulator. The multi-parameter landslide monitoring device based on the weak grating provided by the invention packages the weak optical fiber gratings into various sensors through different packaging technologies according to requirements by customizing and engraving a plurality of weak grating arrays on a single optical fiber to realize the simultaneous monitoring of multiple parameters on one sensing optical cable, which is of great significance in landslide monitoring.

Description

technical field [0001] The invention relates to the technical field of landslide monitoring, in particular to a multi-parameter landslide monitoring device and method based on a weak grating. Background technique [0002] In the landslide monitoring project, in order to master and study the whole landslide process and mechanism, it is necessary to monitor the changes of the inside and outside of the landslide during the landslide process. Due to the complexity of the mechanism of landslide formation, there are various methods for landslide monitoring. At present, landslide surface displacement monitoring has become an important method for landslide research and early warning. The methods used mainly include mechanical measurement method, extensometer method, GPS monitoring method, remote sensing monitoring method, INSAR monitoring method, and distributed optical fiber sensing technology monitoring. method, measurement robot monitoring method, etc. Deep displacement observa...

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Problems solved by technology

[0004] Aiming at the problem that the existing landslide monitoring method can only collect a single parameter and cannot realize the measurement of multiple parameters, the present invention proposes a multi-parameter landslide monitoring device and method based on a weak grating. Write a number of weak grating arrays, use different packaging technologies according to requirements, and package weak fiber gratings into various sensors, realizing simultaneous monitoring of multiple parameters on one sensing optical cable, which is of great significance in landslide monitoring

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