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Method for fixing sensor

A fixing method and sensor technology, which are especially used in the field of cement-based sensors fixed on concrete surfaces, can solve problems such as the difficulty of bolts to control the coupling effect of sensors and concrete structures, the decline of sensor accuracy and sensitivity, and the influence of monitoring system accuracy. , to achieve the effect of simple and easy construction process, good durability and close contact.

Active Publication Date: 2014-02-19
UNIV OF JINAN
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AI Technical Summary

Problems solved by technology

[0002] Sensors are widely used in the health monitoring of concrete structures, but the current method of fixing the sensors is mainly the bolt fixing method. Although this method is simple and fast to operate, it will inevitably cause damage to the concrete structure, especially For concrete structures in special environments such as high-speed rail bridges, once the concrete structure is damaged or the bolts are rusted and loosened to cause the sensor to fall off, it will inevitably leave serious hidden dangers to the normal operation of the high-speed rail.
On the other hand, during long-term use, it is difficult to control the coupling effect between the sensor and the concrete structure due to the rust and looseness of the bolts, which often reduces the accuracy and sensitivity of the sensor, thereby affecting the accuracy of the entire monitoring system. Therefore, it is particularly important to find a non-destructive sensor fixing method that is adaptable to various complex environmental changes for the health monitoring of concrete structures.

Method used

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Embodiment

[0035] This embodiment concretely introduces the application of the inventive method in practice, and the applied bridge is a certain span high-speed rail concrete structure bridge, and the total length of the bridge is 46 meters, and the main bridge is a prestressed concrete beam-slab bridge of 13 meters+20 meters+13 meters, and 15 meters wide. Paste the acoustic emission piezoelectric sensor on the bottom surface of the bridge, and polish a rectangular area with an area of ​​5cm×20cm. The specific steps are as follows:

[0036] (1) Concrete surface pretreatment

[0037] Draw a line on the concrete surface, determine the position where the sensor and carbon fiber cloth is pasted is one meter away from the pier, and the grinding area is a rectangular area of ​​5cm×20cm. Remove the paint layer in this area, remove the inferior concrete such as spalling, loose, and honeycomb on the surface of the structure, and expose the concrete structure layer. The raised part of the concre...

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Abstract

The invention discloses a method for fixing a sensor. The method includes the steps of using carbon fiber cloth to fix the sensor on the surface of concrete, enabling the carbon fiber cloth to tightly wrap three faces of the sensor through epoxy resin adhesives, reserving a section of the carbon fiber cloth, and after the epoxy resin adhesives are completely solidified, using the reserved carbon fiber cloth to fix the sensor on the surface of the concrete through epoxy resin adhesives. The method for fixing the sensor is easy to operate, high in operating flexibility, small in sensor size limitation, suitable for various complex environments, safe, reliable and good in durability, the sensor can be firmly and tightly fixed to the surface of a concrete structure, the good coupling effect is achieved, damage to the concrete structure is avoided, the sensor can be effectively protected through the fact that the sensor is wrapped by the carbon fiber cloth, the service life of the sensor is prolonged, and the method for fixing the sensor is particularly suitable for health detection of concrete buildings in special environments such as high-speed rail bridges.

Description

technical field [0001] The invention relates to a method for fixing a sensor, especially a cement-based sensor, on a concrete surface, in particular to a sensor fixing method that can be applied in a special environment and does not damage the concrete structure. Background technique [0002] Sensors are widely used in the health monitoring of concrete structures, but the current method of fixing the sensors is mainly the bolt fixing method. Although this method is simple and fast to operate, it will inevitably cause damage to the concrete structure, especially For concrete structures in special environments such as high-speed rail bridges, once the concrete structure is damaged or the bolts are rusted and loosened to cause the sensor to fall off, it will inevitably leave serious hidden dangers to the normal operation of the high-speed rail. On the other hand, during long-term use, it is difficult to control the coupling effect between the sensor and the concrete structure d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D11/16
Inventor 程新黄世峰徐东宇叶正茂徐跃胜
Owner UNIV OF JINAN
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