Real-time looseness degree monitoring device for bolts of power transmission tower

Abstract

The invention discloses a real-time looseness degree monitoring device for bolts of power transmission tower. The real-time looseness degree monitoring device comprises a pressure sensor group arranged on the bolts of the power transmission tower, wherein the pressure sensor group comprises a pressure sensor A, a pressure sensor B and a pressure sensor C; the pressure sensor A, the pressure sensorB and the pressure sensor C are sequentially connected with an A / D conversion processor, a microprocessor, a 4G communication module and a monitoring center in a wired connection mode, the A / D conversion processor, the microprocessor and the 4G communication module are connected with a power module, and the power module supplies 10 V direct-current voltage to the pressure sensor A, the pressure sensor B and the pressure sensor C. According to the real-time looseness degree monitoring device, the looseness of the bolts of the power transmission tower under the excitation of external conditionscan be monitored.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring of power transmission towers, and in particular relates to a device for monitoring the real-time looseness degree of bolts of power transmission towers. Background technique [0002] Transmission towers work outdoors where the environment changes, and transmission towers are affected by the external environment for a long time, such as external excitations such as their own gravity, vibration, temperature difference, and wind load. Bolts are the connection nodes connecting the transmission tower materials, and the bolts are easily stimulated by the outside world to cause loosening. The loosening of a single bolt will aggravate the vibration of the tower body due to its own gravity. If the loosened bolts are not reinforced, the tower body will continue to aggravate the vibration caused by its own weight, and it will also accelerate the occurrence of loose bolts that did not occ...

AI Technical Summary

Problems solved by technology

Loose bolts of transmission towers are typical hidden structural safety hazards. The traditional way of line inspection by workers is time-consuming, laborious, inefficient, and labor-intensive

The existing tower bolt loosening method is a fast monitoring device for tower loosening. When the bolt is loose, there will be relative motion between the bolt and the nut. An external vibration source is applied to any part of the tower, and the echo signal is monitored by a sensor. , to judge whether there is a secondary impact sound in the echo signal, so as to determine whether there is looseness, but this method can only judge that the bolts and tower components are relatively loose, and may also cause errors for some small displacement components. Call the police

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