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Piezomagnetic turbine loss type reinforced concrete strain sensor and piezomagnetic strain meter thereof

A strain sensor, reinforced concrete technology, applied in electric/magnetic solid deformation measurement, force measurement by measuring the change of magnetic properties of materials caused by applied stress, instruments, etc., can solve the problems of expensive sensors and detection equipment, and achieve elimination Measurement error, good stability and reliability, the effect of linear improvement

Inactive Publication Date: 2011-08-31
何思龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many factors affecting fiber optic sensors, and sensors and detection equipment are expensive, so it is urgent to develop new and more reliable sensors and corresponding detection equipment and detection technology

Method used

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  • Piezomagnetic turbine loss type reinforced concrete strain sensor and piezomagnetic strain meter thereof
  • Piezomagnetic turbine loss type reinforced concrete strain sensor and piezomagnetic strain meter thereof
  • Piezomagnetic turbine loss type reinforced concrete strain sensor and piezomagnetic strain meter thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] One of piezomagnetic eddy consumption reinforced concrete strain sensors such as figure 1 As shown, the strain sensor includes a ferromagnet 1, a double-elastic free-end combined cantilever beam 2 integrally processed with the ferromagnet, a ferrite coil 3, a ferromagnetic foot mark 4 that is matched and connected to the cone hole and the cone, and a positioning hole 5. Brake screw 6 and outlet cable plug 7. Wherein, the combined cantilever beam with double elastic free ends is two combined cantilever beams with one end fixed and one end with a semicircular, U-shaped or S-shaped elastic free end. When assembling, firstly bond the ferrite coil 3 to the frame of the ferromagnet with epoxy resin, and place it on the center line of the fixed end of the cantilever beam, keeping the gap between the coil core and the surface of the cantilever beam at 0.1-0.15mm , and then install the foot mark, stop screw, outgoing cable and plug parts. During the measurement, use epoxy glue...

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Abstract

The invention discloses a piezomagnetic turbine loss type reinforced concrete strain sensor, and is characterized in that a piezomagnetic turbine loss effect is used as a sensing mechanism to manufacture a piezomagnetic turbine loss type reinforced concrete strain sensor and a piezomagnetic stain meter thereof for measuring surface strain, inner strain and steel bar strain. The sensor is designedwith a mechanics model and a deformation structure of a combined cantilever beam or a cantilever curved beam with two elastic free ends. The invention uses a seamless connection technology of whole manufacturing and conical hole connection and a component separation signal processing method. Compared with the prior art, the invention has the characteristics of high sensitivity, good stability, small measuring error, strong reliability, simple structure, low cost and convenient use; and the invention has wide application prospect.

Description

technical field [0001] The invention relates to a piezomagnetic vortex loss type reinforced concrete strain sensor and a piezomagnetic strain gauge thereof, belonging to the technical field of electrical measurement of strain and stress of reinforced concrete engineering structures. Background technique [0002] Concrete and steel strain (stress) measurement is a must-have test item for all large-scale reinforced concrete structure strength tests or safety assessments. At present, the most common method at home and abroad is the resistance strain measurement method, that is, the resistance strain gauge is pasted on the concrete surface, or the measuring element made of the resistance strain gauge is embedded in the concrete for strain measurement, and then the structure is calculated according to the elastic modulus of the concrete. of stress. The biggest problem with this method is that environmental factors such as temperature, humidity, water tide, etc. have a huge impac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/24G01L1/12G01L9/16
Inventor 何思龙黄先应陈孟诗
Owner 何思龙
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