Vibration sensor fixing device with weather-proof function

Abstract

A vibration sensor fixing device with a weather-proof function is composed of two major parts: a multifunctional base and a weather-proof fixing hood. Compared with other sensor fixing devices, factors influencing sensor measurement and layout are considered comprehensively. First, the device is weather-proof, a sensor connecting line is fixed by a moving cover plate of the fixing device, the fixing hood can further isolate the influence of the external environment, so that a sensor is protected, and data measurement is not interfered by weather. Secondly, the multifunctional base adopted provides a variety of modes of connection with a tested object in structure, and the base can be fixed by an adhesive, magnetic or mechanical fixing method according to the features of the tested structure and the field environment; and a sensor can be directly and reliably in contact with the tested object through a vertical pressing device and a reversed sensor mounting hole of the base. As the way of fixing is flexible and convenient and damage to the sensor is avoided, the fixing effect of the sensor is guaranteed effectively.

Description

Technical field [0001] The invention relates to a vibration sensor fixing device with a weatherproof function, belonging to the technical field of sensor fixing and protection facilities. Background technique [0002] When performing outdoor vibration detection or monitoring, the vibration sensor is generally fixed on the surface of the object to be measured to obtain measurement information. At present, the sensor fixing methods mainly include mechanical fixing, adhesive fixing and magnetic adsorption fixing. Mechanical fixation is to fix the sensor on the surface of the measured object through a fixed fixture or a tightening screw, and the measured frequency response is true and reliable; however, it needs to be drilled and fixed on the measured object, which cannot achieve non-destructive testing, and is not suitable for non-drilling The measured object of the hole. Magnetic adsorption fixation is to fix the sensor by magnetic attraction, without damaging the measured object...

AI Technical Summary

Problems solved by technology

Mechanical fixation is to fix the sensor on the surface of the measured object by fixing fixtures or fastening screws, and the measured frequency response is true and reliable; but it needs to be fixed by drilling holes on the measured object, which cannot be used for non-destructive testing, and is not suitable for non-drilling hole in the measured object

Magnetic adsorption fixation is to fix the sensor through magnetic attraction, without destroying the object under test, and it is easy to move; however, the frequency response of the sensor will be reduced by using the magnetic attraction test, and for non-metallic materials such as concrete, it is necessary to paste the metal for fixing in advance. Sheet, adhesive layer and pasting conditions will also affect the test accuracy

Adhesive fixation is to fix the sensor on the surface of the measured object by applying adhesive on the surface of the sensor, which is applicable to the measured objects on different surfaces; but the adhesive is directly applied to the surface of the sensor, and the sensor needs to be fixed after each use. Cleaning the surface will cause some damage to the sensor, and it is not suitable for impact measurement

[0003] On the other hand, during the outdoor vibration detection or monitoring of large civil structures such as bridges and dams, the wind and rain environment at the measurement site will directly interfere with the sensor data collection

Under the influence of on-site gusts, the swing of the connecting line near the sensor interface will bring obvious disturbance and deviation to the measurement data; and rainwater will easily enter the sensor interface, resulting in unstable data upload and sensor false alarms

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