High-precision non-contact slope dangerous rock monitoring and early warning method

Abstract

The invention provides a high-precision non-contact slope dangerous rock monitoring and early warning method. The high-precision non-contact slope dangerous rock monitoring and early warning method specifically comprises the following steps of arranging a monitoring instrument; carrying out camera calibration; starting a vibration measurement module to obtain a speed time history of the surface of the slope dangerous rock; starting a large-scale particle image velocity measurement module to obtain a slope dangerous rock image; the calculation module calculating the vibration dominant frequency and the displacement change rate of the slope dangerous rock according to the speed time history and the slope dangerous rock image; the vibration dominant frequency and the displacement change rate of the slope dangerous rock being monitored in real time, when the vibration dominant frequency and the displacement change rate reach preset threshold values, early warning being given out, and the shooting frequency of the large-scale particle image velocity measurement module being adjusted according to the early warning information. The method is based on a large-scale particle image velocity measurement technology and a laser vibration measurement technology, realizes remote, non-contact and real-time monitoring and early warning of the slope dangerous rock, is superior to a traditional slope dangerous rock monitoring method, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of slope dangerous rock monitoring and early warning, in particular to a high-precision non-contact slope dangerous rock monitoring and early warning method. Background technique [0002] my country is a country with frequent landslide disasters, and the loss of life and property caused by the collapse of dangerous rocks every year is very huge. The monitoring and early warning of dangerous slope rocks has always been a research hotspot and difficulty in disaster prevention and mitigation engineering. The purpose of monitoring and early warning of dangerous rocks on slopes is to detect and grasp the displacement movement of dangerous rock blocks in time, monitor the displacement speed and direction of dangerous rocks on slopes, and the stability of dangerous rocks. It is of great significance to study an effective and convenient monitoring and early warning method for slope dangerous rocks, which is related...

AI Technical Summary

Problems solved by technology

[0003] However, most of the existing monitoring and early warning technologies for dangerous rocks on slopes are contact monitoring methods, which have defects such as complicated deployment of monitoring instruments, high risk in the deployment process, and only single-point monitoring.

Although some existing non-contact monitoring methods for dangerous rocks on slopes have overcome many shortcomings of contact methods, they still have defects such as low measurement accuracy and expensive equipment.

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