Device and method for online monitoring looseness of bolts on transmission tower

Abstract

The invention discloses a device and method for online monitoring the looseness of bolts on a transmission tower. The device is characterized in that it comprises a front-end monitoring device, a 4G communication module and a monitoring center which are connected successively; the front-end monitoring device comprises a piezoelectric acceleration sensor, a conditioning circuit and an Xbeepro s2c module which are connected successively; a wind speed and direction sensor is connected with the Xbeepro s2c module; the Xbeepro s2c module is connected to the 4G communication module. The intrinsic frequency matrix of an iron tower member is calculated by the monitoring center, and is compared with an intrinsic frequency matrix where no bolt looseness happens and obtained by modal analysis, thus,the bolt looseness of the transmission tower is determined. The invention also discloses a method for online monitoring the looseness of bolts on a transmission tower, which solves the defect of the traditional manual line inspection, realizes the on-line monitoring of the loosening of the bolts of the transmission line, and reduces the safety hidden troubles of the tower operation.

Description

technical field [0001] The invention belongs to the field of on-line state monitoring and fault diagnosis of transmission lines, and relates to an on-line monitoring device for iron tower bolt looseness of transmission lines, and also relates to a monitoring method using the monitoring device. Background technique [0002] At present, except for a few important occasions where steel pipe towers are used for transmission towers, most of them are assembled on-site. Threaded connection is a widely used method for the assembly of transmission towers. Under dynamic loads (such as long-term breeze vibration of transmission lines, wind loads, etc.) or occasions with large temperature differences, bolted connections are prone to loosening. After loosening, the connection strength disappears, making the tower in a high-risk state. Tower collapse accidents are very likely to occur in strong winds outside, or under conditions of ice and snow. According to statistics, bolts and nuts th...

AI Technical Summary

Problems solved by technology

At present, there is no complete online monitoring device for the loosening of iron tower bolts, and the traditional manual inspection method has to be relied on

However, due to the complex structure of the iron tower, manual inspection is difficult to thoroughly investigate, which bury hidden dangers for the safety performance of the iron tower

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