Sensor for monitoring/measuring stress/ strain

A technology for measuring stress and sensors, which is applied in the field of sensors, can solve problems such as low survival rate, low sensitivity, and poor durability, and achieve the effects of high survival rate, high sensitivity, and good compatibility for embedding

Inactive Publication Date: 2008-03-26
HARBIN INST OF TECH
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of low sensitivity, poor compatibility with concrete, poor durability and inability to achieve long-term accurate monitoring of sensing elements used in existing civil construction; the auxiliary equipment for testing optical fiber sensing elements is expensive and complicated, and its survival rate is low problem, a sensor for monitoring / measuring stress / strain in the field of civil engineering is provided, and the specific technical solution for solving the above problems is as follows:

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sensor for monitoring/measuring stress/ strain

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Specific implementation manner 1: This implementation manner is described in conjunction with FIG. 1 . This embodiment consists of a smart cement-based material 1 and a plurality of electrodes 2. The plurality of electrodes 2 are in the form of sheets, meshes or rings, buried in the smart cement-based material 1 at intervals or pasted or plated on the surface of the smart cement-based material.

[0012] The smart cement-based material is a mixture of conductive materials and cement-based materials, and its components are 1-80% by weight of conductive materials, and the balance is cement-based materials.

[0013] The conductive material is made of metal nickel powder alone, or by weight percentage of 10% to 70% of metal nickel powder and chopped carbon fiber, carbon fiber powder, steel slag, steel fiber, copper powder, graphite or carbon black or a variety of arbitrary proportions.

[0014] The electrodes are made of gold, silver, copper, stainless steel and materials w...

specific Embodiment approach 2

[0015] Specific Embodiment 2: In this embodiment, the plurality of electrodes 2 are in the shape of sheet, mesh or ring, and the plurality of electrodes 2 are configured as two electrodes, three electrodes or four electrodes by pasting, electroplating or embedding.

specific Embodiment approach 3

[0016] Specific Embodiment Three: This embodiment will be described in conjunction with FIG. 3 . In this embodiment, the smart cement-based material 1 is composed of nickel powder and cement stone. The nickel powder is 60.8% by weight, and the balance is prepared with ordinary cement-based materials. The casting method is adopted, and the four electrodes 2 are made of ring-shaped copper The electrode intervals are buried in the smart cement-based material 1, and the size of the sensor is 20mm×20mm×40mm. Its sensing relationship is shown in Table 1.

[0017] The test results show that the sensing element of the embodiment of the present invention has high sensitivity: the stress sensitivity is greater than 0.050 / MPa, and the strain sensitivity is higher than 895.5 (for example, the strain sensing sensitivity coefficient of the resistance strain gauge is only 2-3).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A kind of sensor used for monitoring, measuring stress and strain. It can solve the problems of low sensitivity, bad consistency with concrete, bad wear and monitoring precision all time of sensing component in the present building, and the problems of expensive, complex test assistant device and low survival ratio. The sensor is made up of the alertness cement basal material and many electrodes. Many electrodes with the shape of strip, net or ring are buried in the cement basal material or pasted, plated on the material surface. The sensor of the invention can not only monitor/measure the stress of cement structure but monitor/measure the strain of concrete structure, also in the water conservancy and nuclear engineer. It has the high sensitivity, good wear, consistency and high survival ratio while buried.

Description

technical field [0001] The invention relates to a sensor. Background technique [0002] At present, the sensing elements widely used in civil construction include electrical sensing elements and optical fiber sensing elements. The electrical sensing elements have low sensitivity, poor durability, and poor compatibility with concrete, which cannot achieve the purpose of long-term accurate monitoring. . Optical fiber sensing element test auxiliary equipment is expensive and complicated, its survival rate is low, and there are also problems of poor compatibility with concrete and poor durability. Contents of the invention [0003] The present invention aims to solve the problem of low sensitivity, poor compatibility with concrete, poor durability and inability to achieve long-term accurate monitoring of sensing elements used in existing civil construction; the auxiliary equipment for testing optical fiber sensing elements is expensive and complicated, and its survival rate i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22G01B7/16C04B28/00C04B14/34C04B14/38C04B18/14C04B22/04C04B22/02H01B1/02
CPCY02W30/91
Inventor 欧进萍韩宝国韩宝忠
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap