A Method for Differentiating Ground Vibration Signal Interference Applied to Underground Excavation System

Abstract

The invention provides a method applied to an underground excavation system to differentiate ground vibration signal interference. The method comprises the following steps: arranging more than two ground vibration detectors within a monitoring area; when a target advances, collecting time information when the target passes the monitoring area of each ground vibration detector; as the distance between the two ground vibration detectors are known, calculating the average speed of the target passing the monitoring areas of the two ground vibration detectors by utilizing the relationship between displacement and speed and between time and speed; and judging the cause of generating ground vibration signals through the average speed. According to the method provided by the invention, the characteristic that the difference between the speed of underground excavation and the speed of ground vehicles and personnel is relatively great is utilized, the collected ground vibration signals are judged and differentiated through calculating the speed of the target, accordingly, the efficiency of utilizing micro vibration to perform underground monitoring is improved, and the false alarm rate is reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of underground safety monitoring, and relates to an anti-interference method for an underground excavation system, in particular to a method for distinguishing ground vibration signal interference applied to an underground excavation system. Background technique [0002] At present, there are many ways and means of security monitoring on the ground in my country, including the use of image monitoring, infrared detection, microwave detection, acoustic detection, ultrasonic detection, vibration intrusion detectors and other technologies and equipment for monitoring, the effect is very obvious, but for the use of underground excavation However, it is difficult to effectively monitor and prevent illegal and criminal acts such as theft, smuggling, and prison escape, and they are often discovered after the fact, with obvious lag. Therefore, many universities and scientific research institutions in China are activel...

AI Technical Summary

Problems solved by technology

Earthquake signals are also generated when vehicles and people walk on the ground. After being sensed by the micro-vibration-based underground excavation monitoring system, false alarms are issued, resulting in a high false alarm rate and serious interference to the normal monitoring of the underground excavation system.

Images