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Dynamic concrete stress sensor and calibrating method based on piezoelectric ceramics

A technology of dynamic stress and piezoelectric ceramics, which is applied in the measurement of properties and force of piezoelectric devices, instruments, calibration/testing of force/torque/work instruments, etc., to achieve low cost, simple structure and good compatibility. Effect

Active Publication Date: 2013-08-14
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the distribution of internal stress in concrete structures, there is no effective direct measurement method at present.

Method used

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  • Dynamic concrete stress sensor and calibrating method based on piezoelectric ceramics
  • Dynamic concrete stress sensor and calibrating method based on piezoelectric ceramics
  • Dynamic concrete stress sensor and calibrating method based on piezoelectric ceramics

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0025] refer to figure 1 , this embodiment includes a piezoelectric ceramic sheet 2 packaged in waterproof insulating glue, a shielding wire 3, a joint 5, and two packaged force transmission blocks 1 in the shape of a semi-cylindrical shape. The middle parts of the plane sides of the two packaged force transmission blocks 1 are respectively A groove is provided, and the piezoelectric ceramic sheet 2 is placed in the groove, and the two packaged force transmission blocks 1 and the piezoelectric ceramic sheet 2 pass through the epoxy resin mixed with cement dry powder (wherein the amount of cement dry powder is mixed by weight The percentage is calculated as 10wt%) 4 is bonded and fixed as a whole, and the piezoelectric ceramic sheet 2 is connected to the joint 5 through the shielded wire 3 .

[0026] The shape of the packaged force transmissio...

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PUM

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Abstract

The invention relates to a dynamic concrete stress sensor and a calibrating method based on piezoelectric ceramics. The sensor comprises piezoelectric ceramic sheets subject to waterproof insulation processing, shielded conductors, a connector and two capsulation force transmission blocks; a groove is arranged at the middle part of each of the opposite sides of the two capsulation force transmission blocks; the piezoelectric ceramic sheets are arranged in the grooves; the two capsulation force transmission blocks are bonded and fixed with the piezoelectric ceramic sheets into a whole through epoxy resin mixed with dry cement powder with the weight percentage of 6-14%; and the piezoelectric ceramic sheets are connected with the connector through the shielded conductors. The invention further comprises the dynamic concrete stress sensor calibrating method and an internal dynamic stress measurement system for a concrete structure using the dynamic concrete stress sensor. The dynamic stress sensor and calibrating equipment are simple in structure; the dynamic stress sensor is small in size; the manufacture technology is simple and convenient; the cost performance is high; and the sensor is suitable for volume production.

Description

technical field [0001] The invention relates to a sensor and a calibration method, in particular to a piezoelectric ceramic-based concrete dynamic stress sensor and a calibration method for measuring the dynamic stress of a concrete structure. Background technique [0002] At present, when measuring the stress of concrete and other components, the main method is to paste the mixed resistance strain gauge on the surface of the component, and indirectly reflect the stress of the concrete through the magnitude of the strain. For the distribution of internal stress in concrete structures, there is no effective direct measurement method at present. Contents of the invention [0003] The object of the present invention is to provide a concrete dynamic stress sensor based on piezoelectric ceramics and a calibration method with simple structure, small volume, simple manufacturing process, low cost and good compatibility with concrete. [0004] Technical scheme of the present inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/16G01L25/00
Inventor 许斌刘益明李立飞
Owner HUNAN UNIV
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