CN205080083U - Crack monitoring sensor - Google Patents
Crack monitoring sensor Download PDFInfo
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- CN205080083U CN205080083U CN201520857141.5U CN201520857141U CN205080083U CN 205080083 U CN205080083 U CN 205080083U CN 201520857141 U CN201520857141 U CN 201520857141U CN 205080083 U CN205080083 U CN 205080083U
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Abstract
The utility model relates to a crack monitoring sensor, including the information sensing layer that sets gradually, information acquisition layer and protective layer, the information acquisition layer includes solder joint, an at least wire and cavernous structure crack monitoring position, traverse loop is vertical flagging around the both ends of the outside at cavernous structure crack monitoring position and wire symmetry, and wrap up by the electrolytic copper foil at the both ends of wire, and the solder joint setting is in the electrolytic copper foil of the both ends of wire, the region of encircleing at the wire is equipped with the crackle district of sensor, the solder joint is connected through lead wire and quilt monitoring piece, the information sensing layer comprises polymer, conducting particles and adhesive, and the adhesive combines together with the surperficial solidification of the structure by the monitoring piece, and the polymer sputters the surface at the conducting particles, the protective layer comprises polyimide film and AB glue or metal components. The utility model discloses a sensing structure surface crack length change converts it into the detecting element sensor that resistance variation measured measured object spare surface crack, real -time supervision perception part.
Description
Technical field
The utility model belongs to the monitoring sensor of a kind of structural health (damage), is specifically related to a kind of crack monitoring sensor.
Background technology
Information smart coat is applied to structural danger position according to the feature of component by the monitoring sensor of prior art, smart coat comprises the sensing layer be arranged on component matrix, sensing layer is by conducting particles, modifier forms, thickness is tens nanometers between tens microns, driving layer is provided with between sensing layer and component matrix, layer is driven to be divided into organic material to drive layer, inorganic material drives layer, inorganic material drives layer to be made up of inorganic non-conducting material, organic material drives layer to be made up of organic non-conducting material, layer and component matrix and sensing layer is driven to be solidified into one, the thickness of layer is driven to be between tens microns to hundreds of micron, protective seam is outside equipped with at sensing layer, protective seam is made up of non-conducting material.Have in laboratory time enough and space to realize, and coat information smart coat at existing equipment structural danger position by the very difficult realization of Time and place condition restriction, smart coat difficult quality guarantee, can not widespread use on existing.
Utility model content
In order to solve the problems referred to above that prior art exists, the utility model provides a kind of crack monitoring sensor, by perceptual structure surface crack length variations, and be converted into resistance change to measure the detecting element sensor of measured object surface crack, be structural crack real-time monitoring system information Perception parts.
The technical scheme that the utility model adopts is:
A kind of crack monitoring sensor, its improvements are: described sensor comprises the information sensing layer set gradually, information acquisition layer and protective seam;
Described information acquisition layer belongs to resistive components and parts, comprises solder joint, at least one wire and cavernous structure crack monitoring position; Described conductor loop around cavernous structure crack monitoring position outside and the two ends symmetry of wire is vertically sagging, the two ends of wire are wrapped up by electrolytic copper foil, and described solder joint is arranged in the two ends electrolytic copper foil of wire; The cracked zone of described sensor is provided with at the circle zone of wire; Described solder joint is connected with monitored by lead-in wire.
Preferably, described information sensing layer is made up of polymkeric substance, conducting particles and tackifier, and the body structure surface of described tackifier and monitored solidifies and combines together, and described polymkeric substance sputters at the surface of conducting particles.
Preferably, described protective seam is made up of polyimide film and AB glue or hardware; The polyimide film of described protective seam is arranged on the outermost layer of described sensor, and described sensor is fixed by AB glue or hardware.
The beneficial effects of the utility model are:
1., by bonding for crack monitoring sensor or be fixed on structural member, can realize carrying out real-time crack monitoring to structural member position;
2., when pair enclosed construction parts must carry out Crack Damage monitoring, crack monitoring sensor can be assembled in after on enclosed construction crackle part, then carry out position installation, solve the not measurable problem of current conventional flaw detection means;
3. detect time need not decomposition texture position and sealing position, need not remove enamelled coating, detection more convenient and quicker compared with traditional detection technique, engineering adaptability is strong;
4. crack monitoring sensor can carry out bonding with structural member, to construction environment without particular/special requirement by the technique for sticking of research and development fast.Crack monitoring sensor can random variation on request, can meet labyrinth crack monitoring needs;
5. select the characterization parameter that resistance value variable is monitored as structural crack, signal extraction, collection, disposal system are effectively reliable.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of crack monitoring sensor of the present utility model;
Fig. 2 is the crack monitoring sensor mount schematic diagram that the utility model provides;
Fig. 3 is the Sensor monitoring zone crack change schematic diagram that the utility model provides;
Fig. 4 is that the single hole that the utility model provides draws the sensor resistance of sample with the change schematic diagram of fatigue and cyclic cycle.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
The following description and drawings illustrate specific embodiments of the present utility model fully, to enable those skilled in the art to put into practice them.Other embodiments can comprise structure, logic, electric, process and other change.Embodiment only represents possible change.Unless explicitly requested, otherwise independent assembly and function are optional, and the order of operation can change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The scope of embodiment of the present utility model comprises the gamut of claims, and all obtainable equivalent of claims.In this article, these embodiments of the present utility model can be represented with term " utility model " individually or always, this is only used to conveniently, and if in fact disclose the utility model more than, be not the scope that automatically will limit this application be any single utility model or utility model design.
Crack monitoring sensor is by perceptual structure surface crack length variations, and be converted into resistance change to measure the detecting element sensor of measured object surface crack, structural crack real-time monitoring system information Perception parts, by information sensing layer, information acquisition layer and protective seam composition; As shown in Figure 1, information acquisition layer belongs to resistive components and parts to its diagrammatic cross-section, comprises solder joint, at least one wire and cavernous structure crack monitoring position; Described conductor loop around cavernous structure crack monitoring position outside and the two ends symmetry of wire is vertically sagging, the two ends of wire are wrapped up by electrolytic copper foil, and described solder joint is arranged in the two ends electrolytic copper foil of wire; The cracked zone of described sensor is provided with at the circle zone of wire; Described solder joint is connected with monitored by lead-in wire.Information sensing layer is made up of polymkeric substance, conducting particles and tackifier, the body structure surface of described tackifier and monitored solidifies and combines together, described polymkeric substance sputters at the surface of conducting particles, solidified by tackifier and monitored body structure surface and combine together, body structure surface stress deformation or when cracking, information sensing layer activation bit acquisition layer is out of shape together, and the resistance of acquisition layer can produce a variable, for structural crack real-time monitoring system provides crack information; Protective seam is made up of polyimide film and AB glue or hardware; The polyimide film of described protective seam is arranged on the outermost layer of described sensor, and described sensor is fixed by AB glue or hardware.Determine according to different testing environments protection requirement.
The resistance of crack monitoring sensor and crack length are funtcional relationship, and quantitative expression is as follows:
A-quadrant in Fig. 1 is amplified, can regarding sensor as, to be arranged on a width be l, length is the rectangle monitored area (as Fig. 2) of b, and when this region occurs crackle and expands, sensor can be expressed as formula (1) with the resistance variations Δ R of crack length a:
Wherein, C is coefficient, and it is relevant with resistivity with the thickness of sensing layer.Therefore, crack length a can be expressed as formula (2):
Known according to formula (2), when crack length a is very little, resistance variations Δ R is also very little; When crack length a is more close to sensing layer Critical fracture size, R is larger for resistance variations Δ.
For the torture test of high-strength aluminum alloy standard sample, along with fatigue load loaded is to certain phase, crackle is produced by the edge in hole and is expanded along perpendicular to main loading direction, and the typical change of the resistance value measured by it as shown in Figure 3.
Known with loading the change curve of cycle from Fig. 3 sensor resistance: when the loading effect of testpieces in fatigue load, matrix is in the crack initiation and propagation stage, and the resistance value of sensor increases along with the initiation and propogation of crackle.Therefore, sensor has subsidiary damage feature and tired response characteristic, can characterize the Crack Damage degree of matrix by resistance value as damage electric parameter.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection domain of the present utility model.
Claims (3)
1. a crack monitoring sensor, is characterized in that: described sensor comprises the information sensing layer set gradually, information acquisition layer and protective seam;
Described information acquisition layer belongs to resistive components and parts, comprises solder joint, at least one wire and cavernous structure crack monitoring position; Described conductor loop around cavernous structure crack monitoring position outside and the two ends symmetry of wire is vertically sagging, the two ends of wire are wrapped up by electrolytic copper foil, and described solder joint is arranged in the two ends electrolytic copper foil of wire; The cracked zone of described sensor is provided with at the circle zone of wire; Described solder joint is connected with monitored by lead-in wire.
2. a kind of crack monitoring sensor according to claim 1, it is characterized in that: described information sensing layer is made up of polymkeric substance, conducting particles and tackifier, the body structure surface of described tackifier and monitored solidifies and combines together, and described polymkeric substance sputters at the surface of conducting particles.
3. a kind of crack monitoring sensor according to claim 1, is characterized in that: described protective seam is made up of polyimide film and AB glue or hardware; The polyimide film of described protective seam is arranged on the outermost layer of described sensor, and described sensor is fixed by AB glue or hardware.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520857141.5U CN205080083U (en) | 2015-10-30 | 2015-10-30 | Crack monitoring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520857141.5U CN205080083U (en) | 2015-10-30 | 2015-10-30 | Crack monitoring sensor |
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| CN205080083U true CN205080083U (en) | 2016-03-09 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894445A (en) * | 2017-10-30 | 2018-04-10 | 江阴市恒润重工股份有限公司 | A kind of flange available for end face of flange crack monitoring |
| CN108020583A (en) * | 2017-10-30 | 2018-05-11 | 江阴市恒润环锻有限公司 | A kind of flange that crackle subregion monitoring is carried out using FEA Meshing Method |
| CN112113999A (en) * | 2020-10-14 | 2020-12-22 | 金翼安达航空科技（北京）有限公司 | Crack intelligent detector |
| CN115791460A (en) * | 2022-11-18 | 2023-03-14 | 中国矿业大学 | Sensor for propagation speed of blasting crack in rock material and testing method thereof |
-
2015
- 2015-10-30 CN CN201520857141.5U patent/CN205080083U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894445A (en) * | 2017-10-30 | 2018-04-10 | 江阴市恒润重工股份有限公司 | A kind of flange available for end face of flange crack monitoring |
| CN108020583A (en) * | 2017-10-30 | 2018-05-11 | 江阴市恒润环锻有限公司 | A kind of flange that crackle subregion monitoring is carried out using FEA Meshing Method |
| CN108020583B (en) * | 2017-10-30 | 2021-04-13 | 江阴市恒润环锻有限公司 | Flange for crack regional monitoring by adopting finite element meshing method |
| CN112113999A (en) * | 2020-10-14 | 2020-12-22 | 金翼安达航空科技（北京）有限公司 | Crack intelligent detector |
| CN115791460A (en) * | 2022-11-18 | 2023-03-14 | 中国矿业大学 | Sensor for propagation speed of blasting crack in rock material and testing method thereof |
| CN115791460B (en) * | 2022-11-18 | 2023-08-22 | 中国矿业大学 | Sensor for crack propagation speed of internal blasting of rock material and testing method thereof |
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