A method and system for intelligent monitoring of manhole cover

Abstract

The present application discloses a method and system for intelligent monitoring of manhole covers. The method includes: sending laser signals from N positions with different coordinates in the horizontal direction, where N is an integer greater than or equal to 2; emitting the nth laser from the nth position to the manhole cover Signal, receiving the nth echo signal reflected by the manhole cover, determining the nth time difference between the transmitted and received signals; determining the nth distance according to the nth time difference and the speed of light; according to the difference between the mth distance and the nth distance value, which determines the state of the manhole cover. The system includes a monitoring terminal and a server, and the monitoring terminal includes N laser ranging sensors for collecting the distance between the manhole cover and each laser ranging sensor; the server is used for receiving geographical position signals, distance Signal, determine the state of the manhole cover. The application can reduce the cost and improve the accuracy of monitoring after the manhole cover is abnormal.

Description

technical field [0001] The present application relates to the field of radio testing, in particular to a manhole cover intelligent ranging method and system. Background technique [0002] There are a large number of manhole covers in the city. Due to rain impact, damage, loss and other reasons, the manhole covers often appear tilted and displaced. [0003] At present, the methods of manhole cover monitoring adopted in the prior art mainly include the following methods: one is manual investigation. This method is costly, manpower-intensive, and limited by manpower, and it is difficult to detect dangerous phenomena that cause people to fall or vehicles to fall in time. The second is to generate acceleration through the movement of the manhole cover, and use the acceleration sensor to detect and alarm the movement. However, there are two obvious defects in this method: the first defect is that when the vehicle passes, the manhole cover vibrates and accelerates, but in most ca...

AI Technical Summary

Problems solved by technology

However, there are two obvious defects in this method: the first defect is that when the vehicle passes, the manhole cover vibrates, and there will be acceleration, but in most cases the manhole cover does not tilt or move, resulting in false alarms

The second defect is that when the maintenance personnel of the tube well move the manhole cover during normal operation, this detection method will generate an alarm. have an adverse effect on practical applications

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