CN102494660A - Method for improving strain measurement accuracy of steel member - Google Patents
Method for improving strain measurement accuracy of steel member Download PDFInfo
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- CN102494660A CN102494660A CN2011103461186A CN201110346118A CN102494660A CN 102494660 A CN102494660 A CN 102494660A CN 2011103461186 A CN2011103461186 A CN 2011103461186A CN 201110346118 A CN201110346118 A CN 201110346118A CN 102494660 A CN102494660 A CN 102494660A
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- steel member
- insulating material
- heat
- strain transducer
- silica gel
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Abstract
The invention provides a method for improving the strain measurement accuracy of a steel member, which includes a steel member, a strain sensor, heat conducting silica gel and heat insulating material, and the specific implementing steps are as follows: performing sand-papering and derusting for a detection part of the steel member where the strain sensor is installed, so as to expose the metal; bonding induction points of the strain sensor on the outer surface of the steel member with the exposed metal through the heat conducting silica gel; then filling all the gaps between the strain sensor and the steel member with the heat conducting silica gel; wrapping the strain sensor with the steel member with the heat insulating material; and finally wrapping and sealing the heat insulating material through an aluminum film plastic tape, and enabling that the wrapping width of the heat insulating material extends from the area covering the two ends of the strain sensor to the area equal to 10 times of the diameter of the steel member, and the thickness of the heat insulating material wrapped at the upper part of the strain sensor is not less than 10 to 30mm. The method provided by the invention is little influenced by the environmental temperature, and has the measuring accuracy at least 10 times higher than that of the traditional measurement method.
Description
Technical field
The present invention relates to building iron member strain measurement technique field, specifically a kind of method that improves steel member strain measurement precision.
Background technology
In the construction and the operation process in later stage of steel construction; Utilize sensor the steel member to be carried out the monitoring of strain; A lot of to its sensor monitors data reliability with the influence factor of stability; Go up the technique for fixing that produces string wire in unavoidable deviation such as the vibrating wire sensor except sensor itself manufacturing; And ignoring some when the different accuracy that causes of the creeping of the string of a musical instrument, corrosion etc., sensor mathematical model different choice, sensor installation, that the Monitoring Data that details cause is installed is inaccurate, also will consider the monitoring error that under variation of ambient temperature, causes owing to sensor is different with the residing temperature field of steel member.
The strain of sensor monitors is made up of strain that caused by the external force effect and temperature strain jointly.At present; (like the different errors that cause of the expansion coefficient between string wire in the vibrating wire sensor and the steel member) that the difference that strain transducer usually adopts tested steel member and sensor expansion coefficient and the product of sensor place temperature change value are revised, the temperature change value of promptly giving tacit consent to tested steel component surface is consistent with the temperature change value of this place's sensor.But to being exposed to during outdoor steel member monitors; Can not guarantee each time to measure all before sunrise even temperature and accomplish test job after the match; So eliminate because the different errors that cause with sensor place temperature of temperature of steel component surface can improve the precision of measurement.The present invention be directed to above problem, a kind of mounting structure of taking is in order to reduce because temperature field skewness errors caused.
Structure health monitoring is international in recent years research focus, and it has used modern sensing, communication and network technology, and the stress of structure, strain etc. are monitored, and the data that record through sensor are judged the health status of structure.In recent years, spatial steel structure developed rapidly, and the architect is pro forma attractive in appearance for pursuing, and its structure space is big, and moulding is more and more novel.The design of numerous steel constructions has exceeded the scope of design specifications regulation; A lot of version is that the slip-stick artist is not seen before; Lack dependable engineering experience; So in the work progress of steel construction, introduce construction monitoring, and introduce monitoring structural health conditions operation stage, for later scientific research, design, construction provide the data support in the later stage structure.This just requires in the structure monitoring process, gets rid of the factor that influences sensor acquisition, improves its measuring accuracy, guarantees reliability, the stability of image data.
Summary of the invention
Technical assignment of the present invention is the deficiency that solves prior art, and a kind of method that improves steel member strain measurement precision is provided.
Technical scheme of the present invention realizes by following mode; Comprise steel member, strain transducer, heat conductive silica gel and heat-insulating material; The practical implementation step is following: metal is exposed with the sand papering rust cleaning in the detection position of the steel member being installed strain transducer; Be bonded on the steel external surface of structural member that exposes metal with the induction point of heat conductive silica gel with strain transducer, then, all fill with heat conductive silica gel in all slits between strain transducer and steel member again; With heat-insulating material strain transducer and steel member closely are bundled together again; Use aluminium film plastic adhesive tape that heat-insulating material is carried out environmental sealing at last, heat-insulating material parcel width extends to the diameter of 10 times of steel members from the strain transducer two ends, and the heat-insulating material thickness that is wrapped in the strain transducer top is not less than 10-30mm.
Heat-insulating material is polystyrene foam insulation coiled material or other low heat conductivities insulation coiled material.
The method of raising steel member strain measurement precision of the present invention has following outstanding beneficial effect: influenced by ambient temperature little, measuring accuracy is high, and measuring accuracy improves more than at least 10 times than traditional measurement method.
Description of drawings
Steel member that Fig. 1 is and strain transducer mounting structure synoptic diagram;
Fig. 2 is that the A-A of Fig. 1 is to the section structure synoptic diagram.
Mark in the accompanying drawing is represented respectively:
Embodiment
Below in conjunction with accompanying drawing method of the present invention is done further explain.
The method of raising steel member strain measurement precision of the present invention; Comprise steel member 1, strain transducer 3, heat conductive silica gel 2 and heat-insulating material 4; The practical implementation step is following: metal is exposed with the sand papering rust cleaning in the detection position of steel member 1 being installed strain transducer 3; Be bonded on steel member 1 outside surface that exposes metal with the induction point of heat conductive silica gel 2 again strain transducer 3; Then; All fill with heat conductive silica gel 2 in all slits between strain transducer 3 and steel member 1, with heat-insulating material 4 strain transducer 3 and steel member 1 closely is bundled together again, uses aluminium film plastic adhesive tape 5 that heat-insulating material 4 is carried out environmental sealing at last; Heat-insulating material 4 parcel width extend to the diameter of 10 times of steel members from strain transducer 3 two ends, heat-insulating material 4 thickness that are wrapped in strain transducer 3 tops are not less than 10-30mm.
Heat-insulating material 4 is polystyrene foam insulation coiled material or other low heat conductivities insulation coiled material.
Except that the disclosed technical characterictic of instructions of the present invention, be the public office technology of those skilled in the art.
Claims (2)
1. method that improves steel member strain measurement precision; It is characterized in that; Comprise steel member, strain transducer, heat conductive silica gel and heat-insulating material, the practical implementation step is following: metal is exposed with the sand papering rust cleaning in the detection position of the steel member being installed strain transducer, is bonded on the steel external surface of structural member that exposes metal with the induction point of heat conductive silica gel with strain transducer again; Then; All fill with heat conductive silica gel in all slits between strain transducer and steel member, with heat-insulating material strain transducer and steel member closely is bundled together again, uses aluminium film plastic adhesive tape that heat-insulating material is carried out environmental sealing at last; Heat-insulating material parcel width extends to the diameter of 10 times of steel members from the strain transducer two ends, the heat-insulating material thickness that is wrapped in the strain transducer top is not less than 10-30mm.
2. according to the method under the claim 1, it is characterized in that heat-insulating material is polystyrene foam insulation coiled material or other low heat conductivities insulation coiled material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103461186A CN102494660A (en) | 2011-11-07 | 2011-11-07 | Method for improving strain measurement accuracy of steel member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103461186A CN102494660A (en) | 2011-11-07 | 2011-11-07 | Method for improving strain measurement accuracy of steel member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102494660A true CN102494660A (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103461186A Pending CN102494660A (en) | 2011-11-07 | 2011-11-07 | Method for improving strain measurement accuracy of steel member |
Country Status (1)
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| CN (1) | CN102494660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655449A (en) * | 2017-09-20 | 2018-02-02 | 武汉卡米珈科技有限公司 | For electric power tower bar settlement monitoring device and installation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5284062A (en) * | 1991-03-15 | 1994-02-08 | Straintec Ag | Sensor for measuring elongations |
| CN101037864A (en) * | 2006-03-13 | 2007-09-19 | 天津港湾工程研究所 | Packaged technology for underwater in situ automatically monitoring |
| CN101201275A (en) * | 2006-12-14 | 2008-06-18 | 柳州欧维姆机械股份有限公司 | Sensor for measuring force as well as method for measuring pre-stress anchor wire and bridge support stress |
| CN101216443A (en) * | 2008-01-02 | 2008-07-09 | 沈阳建筑大学 | Piezoelectric intelligent aggregate for civil engineering works structure health monitoring |
-
2011
- 2011-11-07 CN CN2011103461186A patent/CN102494660A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5284062A (en) * | 1991-03-15 | 1994-02-08 | Straintec Ag | Sensor for measuring elongations |
| CN101037864A (en) * | 2006-03-13 | 2007-09-19 | 天津港湾工程研究所 | Packaged technology for underwater in situ automatically monitoring |
| CN101201275A (en) * | 2006-12-14 | 2008-06-18 | 柳州欧维姆机械股份有限公司 | Sensor for measuring force as well as method for measuring pre-stress anchor wire and bridge support stress |
| CN101216443A (en) * | 2008-01-02 | 2008-07-09 | 沈阳建筑大学 | Piezoelectric intelligent aggregate for civil engineering works structure health monitoring |
Non-Patent Citations (1)
| Title |
|---|
| 李志刚等: "基于光纤光栅传感器的混凝土梁应变检测", 《解放军理工大学学报(自然科学版)》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655449A (en) * | 2017-09-20 | 2018-02-02 | 武汉卡米珈科技有限公司 | For electric power tower bar settlement monitoring device and installation method |
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Application publication date: 20120613 |