CN104848779A - Embedded type deformation gauge with ultralow elastic modulus and method for assembling the embedded type deformation gauge with ultralow elastic modulus - Google Patents
Embedded type deformation gauge with ultralow elastic modulus and method for assembling the embedded type deformation gauge with ultralow elastic modulus Download PDFInfo
- Publication number
- CN104848779A CN104848779A CN201510149904.5A CN201510149904A CN104848779A CN 104848779 A CN104848779 A CN 104848779A CN 201510149904 A CN201510149904 A CN 201510149904A CN 104848779 A CN104848779 A CN 104848779A
- Authority
- CN
- China
- Prior art keywords
- bearing platform
- elastic steel
- steel sheet
- deformation gauge
- gauge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
An embedded type deformation gauge with ultralow elastic modulus and a method for assembling the embedded type deformation gauge with ultralow elastic modulus. The embedded type deformation gauge with ultralow elastic modulus includes a copper tube, an elastic steel disc, a fixed bearing platform, a movable bearing platform and an end part flange, and the copper tube is sleeved by a rubber sleeve; one end of the copper tube is fixedly connected with the fixed bearing platform, and the other end is fixedly connected with a coupling; the coupling is connected with the movable bearing platform; two ends of the elastic steel disc are mounted on the bearing platform, and at least one resistance strain gauge is pasted on the surface of the elastic steel disc; and an inner wall of a cavity of the fixed bearing platform is provided with a thermocouple, and the resistance strain gauge and the thermocouple are electrically connected with a data measuring instrument through a strain gauge outgoing line and a thermocouple lead respectively. The assembling method includes the following steps: an elastic steel sheet assembly penetrates into the copper tube, and the left end of the copper tube firmly welded to the fixed bearing platform; the coupling is inserted in the right end of the copper tube, the left end is welded to the copper tube, and the right end is fixed to the movably bearing platform; the right end of the movable bearing platform is screwed in the end part flange; and the rubber sleeve sleeves an outer side face of the copper tube. The embedded type deformation gauge with ultralow elastic modulus and the method for assembling the embedded type deformation gauge with ultralow elastic modulus have the beneficial effects of easily available materials simple assembling, convenient use, good stability and high measurement accuracy.
Description
Technical field
The present invention relates to a kind of baried type deformation gauge and assemble method thereof of ultralow elasticity modulus, belong to civil engineering work inspection, detection technique field.
Background technology
The distortion that various factors causes is one of the important indicator of reflection civil engineering material fundamental property and component, structure military service performance, therefore must accurately be measured.About the research of measuring method and instrument and equipment always comes into one's own.The more deformation measurement instrument of current application is divided into contact displacement meter (comprising all kinds of foil gauge) and the large class of contactless displacement meter two, contact displacement meter belongs to traditional deformation measurement instrument, installation and application is simple, relative low price, but be not obviously suitable for physical property not yet develop sound, intensity is extremely low, the measured body of surface moisture (soil body etc. of concrete, just compacting as just built), and installation site is restricted, be difficult to the long term monitoring realizing structural solid distortion.The appearance of the novel non-contact displacement meters such as such as laser displacement gauge, capacitive displacement meter and vortex flow displacement meter improves precision and the automaticity of deformation measurement, but because equipment is accurate, use cost is high, the weak point such as strict is required to measurement environment and can not be promoted.In addition, this two classes deformation measurement instrument is all installed on measured body outside, and the temperature conditions of its experience is different from the temperature history of measured body, and the deformation measurement obtained need be revised, and this kind of correction is often comparatively complicated, and precision also not easily meets.
Summary of the invention
There is low precision to solve current deformation measurement instrument, the problem strict, cost is high is required to measurement environment, the present invention proposes a kind of deformation measurement and require low, to make simple ultralow elasticity modulus baried type deformation gauge and assemble method thereof without the need to correction, measurement environment.
The baried type deformation gauge of ultralow elasticity modulus of the present invention, it is characterized in that: comprise copper pipe, elastic steel sheet, fixed bearing platform, movable cushion cap, end flange, described copper pipe outside socket gum sleeve, and the inwall of copper pipe outer wall and gum sleeve is fitted; One end and the fixed bearing platform of described copper pipe are affixed, the other end and shaft coupling affixed; Described shaft coupling is connected with movable cushion cap by sunk screw, and the end of movable cushion cap is spirally connected through shaft coupling and end flange; Described elastic steel sheet two ends are arranged on fixed bearing platform and movable cushion cap respectively, and described at least one resistance strain gage of elastic steel sheet surface mount, and resistance strain gage sensitive grid direction and the longitudinal keeping parallelism of elastic steel sheet; The cavity inner wall of described fixed bearing platform is provided with thermopair, fixed bearing platform cavity filled silicon rubber, and resistance strain gage, thermopair are electrically connected respectively by foil gauge extension line, thermocouple wire and DATA REASONING instrument.
Further, two of described elastic steel sheet upper surface convex to form two Ω shape, and between two projections, the upper and lower surface of junction respectively pastes two pieces of resistance strain gages, and four pieces of resistance strain gages form full-bridge connection.
Further, described elastic steel sheet two ends are arranged on fixed bearing platform and movable cushion cap respectively by socket head cap screw and elastomeric pad, and the longitudinal axis level of elastic steel sheet and with two ends cushion cap axis collinear.
Further, copper pipe and fixed bearing platform, shaft coupling, adopt the method for welding to carry out being connected sealing between shaft coupling with end flange.
Further, coordinate precision between described copper pipe inwall with movable cushion cap outside surface, guarantee that deformation gauge only axial deformation occurs, and do not produce bending or reverse.
Further, the axial rigidity of described shaft coupling, much smaller than its bending, torsional rigidity, can transmit the distortion that deformation gauge produces because of responsive to axial force preferably, and its axial rigidity can customize according to actual needs; Preferably, should adopt draw, shaft coupling that compression elasticity modulus is roughly the same.
Whole deformation gauge total length is 60 ~ 200mm, and outer end diameter is 15 ~ 30mm; Described copper pipe length is 40 ~ 150mm, and external diameter is 12 ~ 25mm, and wall thickness is 0.6 ~ 1.5mm.
The length of described elastic steel sheet is 30 ~ 110mm, and width is 5 ~ 8mm, and thickness is 0.3 ~ 0.8mm.
The assemble method of the baried type deformation gauge of ultralow elasticity modulus of the present invention, comprises the following steps:
1) by smooth for surface finish upper and lower in the middle part of elastic steel sheet, and with dipping in the cotton balls wiping of acetone;
2) paste 4 pieces of resistance strain gages in two protruding junction upper and lower surfaces of elastic steel sheet, and 4 pieces of resistance strain gages are connected into full-bridge, respectively insulation processing is carried out to strain label line;
3) on fixed bearing platform elastic steel sheet being fixed on deformation gauge end by socket head cap screw and elastomeric pad and movable cushion cap, this operation steps should guarantee elastic steel sheet longitudinal axis level and with two ends cushion cap axis collinear;
4) by step 3) subassembly that comprises elastic steel sheet and end cushion cap penetrates in copper pipe from right-hand member, copper pipe left end and fixed bearing platform firm welding; Wherein, penetrate in process, avoid elastic steel sheet generation excessive deformation;
5) shaft coupling is inserted copper pipe right-hand member, the left end of shaft coupling welds with copper pipe, and keeps coaxial position; The right-hand member of shaft coupling is fixed by the movable cushion cap of sunk screw and deformation gauge right-hand member;
6) screw in end flange from movable cushion cap right-hand member, flange imposes with shaft coupling contact position and welds;
7) gum sleeve of thermal shrinkage type is enclosed within copper pipe lateral surface, make it to shrink with heat gun heating and fit with deformation gauge surface, whole deformation gauge assembling is complete.
The invention has the beneficial effects as follows: because the elastic modulus of this deformation gauge is far below the elastic modulus of measured body, and measured body inside can be imbedded, experience the operating mode identical with measured body, therefore synchronously can respond to the deformation characteristic of measured body accurately and efficiently, be particularly useful for measuring during cement-based material (i.e. concrete, mortar, clean slurry etc.) is transformed into hard solids gradually from plastic state and the volume change distortion later occurred.Material therefor of the present invention and spare and accessory parts are easy to get, assembling is simple, easy to use, good stability, can Long-Time Service, and measuring accuracy is high, effectively compensate for defect and the deficiencies such as arranging of traditional Light deformation measuring technique existence is loaded down with trivial details, disturbing factor is many, operating difficulties, be expected the inspection and the scientific research that are widely used in civil engineering material and structure.
Accompanying drawing explanation
Fig. 1 is front view of the present invention.
Fig. 2 is vertical view of the present invention.
To be baried type deformation gauge (ESS) of the present invention measure contrast test device schematic diagram with tangent displacement sensor (CDS) Light deformation to Fig. 3 that (9 represent base; 92 represent magnetic base; 93 represent pre-buried probe).
Fig. 4 is that baried type deformation gauge (ESS) of the present invention measures comparative test result comparison diagram with tangent displacement sensor (CDS) Light deformation.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing
With reference to accompanying drawing:
The baried type deformation gauge of embodiment 1 ultralow elasticity modulus of the present invention, comprise copper pipe 1, elastic steel sheet 2, fixed bearing platform 3, movable cushion cap 4, end flange 5, described copper pipe 1 outside socket gum sleeve 11, and the inwall of copper pipe 1 outer wall and gum sleeve 11 is fitted; One end and the fixed bearing platform 3 of described copper pipe 1 are affixed, the other end and shaft coupling 12 affixed; Described shaft coupling 12 is connected with movable cushion cap 4 by sunk screw, and the end of movable cushion cap 4 is spirally connected through shaft coupling 12 and end flange 5; Described elastic steel sheet 2 two ends are arranged on fixed bearing platform 3 and movable cushion cap 4 respectively, and described at least one resistance strain gage 21 of elastic steel sheet 2 surface mount, and resistance strain gage 21 sensitive grid direction and the longitudinal keeping parallelism of elastic steel sheet 2; The cavity inner wall of described fixed bearing platform 3 is provided with thermopair, fixed bearing platform 3 cavity filled silicon rubber, and resistance strain gage 21, thermopair are electrically connected with DATA REASONING instrument 6 respectively by foil gauge extension line 22, thermocouple wire 23.
Further, two projections 24 of described elastic steel sheet 2 upper surface form two Ω shape, and between two projections 24, the upper and lower surface of junction respectively pastes two pieces of resistance strain gages 21, and four pieces of resistance strain gages 21 form full-bridge connection.
Further, described elastic steel sheet 2 two ends are arranged on fixed bearing platform 3 and movable cushion cap 4 respectively by socket head cap screw 25 and elastomeric pad, and the longitudinal axis level of elastic steel sheet 2 and with two ends cushion cap axis collinear.
Further, copper pipe 1 and fixed bearing platform 3, shaft coupling 12, adopt the method for welding to carry out being connected and seal between shaft coupling 12 with end flange 5.
Further, coordinate precision between described copper pipe 1 inwall with movable cushion cap 4 outside surface, guarantee that deformation gauge only axial deformation occurs, and do not produce bending or reverse.
Further, the axial rigidity of described shaft coupling 12, much smaller than its bending, torsional rigidity, can transmit the distortion that deformation gauge produces because of responsive to axial force preferably, and its axial rigidity can customize according to actual needs; Preferably, should adopt draw, shaft coupling that compression elasticity modulus is roughly the same.
Whole deformation gauge total length is 60 ~ 200mm, and outer end diameter is 15 ~ 30mm; Described copper pipe length is 40 ~ 150mm, and external diameter is 12 ~ 25mm, and wall thickness is 0.6 ~ 1.5mm.
The length of described elastic steel sheet 2 is 30 ~ 110mm, and width is 5 ~ 8mm, and thickness is 0.3 ~ 0.8mm.
The assemble method of the baried type deformation gauge of the ultralow elasticity modulus described in embodiment 2 embodiment 1, comprises the following steps:
1) by smooth for surface finish upper and lower in the middle part of elastic steel sheet 2, and with dipping in the cotton balls wiping of acetone;
2) paste 4 pieces of resistance strain gages 21 in two projection 24 junction upper and lower surfaces of elastic steel sheet 2, and 4 pieces of resistance strain gages 21 are connected into full-bridge, respectively insulation processing is carried out to strain label line;
3) on the fixed bearing platform 3 elastic steel sheet 2 being fixed on deformation gauge end by socket head cap screw 25 and elastomeric pad and movable cushion cap 4, this operation steps should guarantee elastic steel sheet 2 longitudinal axis level and with two ends cushion cap axis collinear;
4) by step 3) subassembly that comprises elastic steel sheet 2 and end cushion cap penetrates in copper pipe 1 from right-hand member, copper pipe 1 left end and fixed bearing platform 3 firm welding; Wherein, penetrate in process, avoid elastic steel sheet 2 that excessive deformation occurs;
5) shaft coupling 12 is inserted copper pipe 1 right-hand member, the left end of shaft coupling 12 welds with copper pipe 1, and keeps coaxial position; The right-hand member of shaft coupling 12 is fixed by the movable cushion cap 4 of sunk screw and deformation gauge right-hand member;
6) screw in end flange 5 from movable cushion cap 4 right-hand member, flange imposes with shaft coupling 12 contact position and welds;
7) gum sleeve 11 of thermal shrinkage type is enclosed within copper pipe lateral surface, make it to shrink with heat gun heating and fit with deformation gauge surface, whole deformation gauge makes complete.
Embodiment 3 is in order to verify the measurement effect of baried type deformation gauge (referred to as ESS), the early deformation (main manifestations is for self-constriction) caused because of non-load factor with concrete, for measuring object, adopts the contact method burying deformation gauge of the present invention and the conventional outer setting high accuracy displacement sensor (referred to as CDS) of the art in inside underground to carry out synchro measure to concrete Free Transform.
Adopt concrete match ratio as follows: strength grade is the portland cement 515kg/m of 52.5
3; Mixing water 155kg/m
3; Common river sand 718kg/m
3; The rubble 1032kg/m of 5 ~ 16mm
3; High efficiency water reducing agent 7.21kg/m
3.This concrete slump is 61mm; Slump flow test is 25mm; Strength grade is C60.
For measuring the prism that the test specimen of concrete early deformation is 100mm × 100mm × 400mm.By preceding method, demarcation test is carried out to ESS before test, obtain fundamental performance parameter.
When installing deformation gauge 8ESS, axially parallel with the long limit of die trial 7 and be positioned at the center of die trial in order to ensure it, when preventing concrete casting from injecting mould, the position of ESS changes, employing thin wire colligation deformation gauge two ends, and is fixed in die trial.Thin wire lashing location can not at shaft coupling gap place.Concrete divides two-layer up and down building, and when plugging and pounding ESS periphery concrete, should avoid touching deformation gauge.After the floating shaping of surface of test piece, cover it with plastic sheeting 91 (Te Fulong).After leaving standstill about 30min, connection wire and the strain of ESS, temperature data acquisition instrument are connected, can realize the Real-Time Monitoring of measured position concrete deformation and temperature, the data collection interval of setting is 20min.
Form removal after about 12h to concrete sample face seal, then carries out externally measured to concrete Free Transform arranging CDS displacement transducer 10.The installation site of ESS and CDS as shown in Figure 3.Whole test all temperature be (20 ± 3) DEG C, humidity carries out under being the environment of (50 ± 5) %.
Inner ESS and the outside CDS institute of concrete sample surveys the comparing result that concrete self-shrinkage strains and is presented in intuitively in Fig. 4.Obviously, the time-history curves variation tendency of the two is consistent, and measured value has gap slightly, maximum deviation about 13 μ ε.Because the measuring accuracy of ESS is higher than CDS, so the deformation curve obtained is more smooth.Test findings accordingly, has reason to think that this novel strain transducer can monitor concrete real-time deformation trend preferably, has feasibility.
Content described in this instructions embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also comprises those skilled in the art and conceives the equivalent technologies means that can expect according to the present invention.
Claims (7)
1. the baried type deformation gauge of ultralow elasticity modulus, is characterized in that: comprise copper pipe, elastic steel sheet, fixed bearing platform, movable cushion cap, end flange, described copper pipe outside socket gum sleeve, and the inwall of copper pipe outer wall and gum sleeve is fitted; One end and the fixed bearing platform of described copper pipe are affixed, the other end and shaft coupling affixed; Described shaft coupling is connected with movable cushion cap by sunk screw, and the end of movable cushion cap is spirally connected through shaft coupling and end flange; Described elastic steel sheet two ends are arranged on fixed bearing platform and movable cushion cap respectively, and described at least one resistance strain gage of elastic steel sheet surface mount, and resistance strain gage sensitive grid direction and the longitudinal keeping parallelism of elastic steel sheet; The cavity inner wall of described fixed bearing platform is provided with thermopair, fixed bearing platform cavity filled silicon rubber, and resistance strain gage, thermopair are electrically connected respectively by the DATA REASONING instrument of foil gauge extension line, thermocouple wire and deformation gauge outside.
2. the baried type deformation gauge of ultralow elasticity modulus as claimed in claim 1, it is characterized in that: two of described elastic steel sheet upper surface convex to form two Ω shape, between two projections, the upper and lower surface of junction respectively pastes two pieces of resistance strain gages, and four pieces of resistance strain gages form full-bridge connection.
3. the baried type deformation gauge of ultralow elasticity modulus as claimed in claim 2, it is characterized in that: described elastic steel sheet two ends are arranged on fixed bearing platform and movable cushion cap respectively by socket head cap screw and elastomeric pad, and the longitudinal axis level of elastic steel sheet and with two ends cushion cap axis collinear.
4. the baried type deformation gauge of ultralow elasticity modulus as claimed in claim 3, is characterized in that: copper pipe and fixed bearing platform, shaft coupling, adopts the method for welding to carry out being connected sealing between shaft coupling with end flange.
5. the baried type deformation gauge of ultralow elasticity modulus as claimed in claim 1, it is characterized in that: whole deformation gauge total length is 60 ~ 200mm, outer end diameter is 15 ~ 30mm; Described copper pipe length is 40 ~ 150mm, and external diameter is 12 ~ 25mm, and wall thickness is 0.6 ~ 1.5mm.
6. the baried type deformation gauge of ultralow elasticity modulus as claimed in claim 5, is characterized in that: the length of described elastic steel sheet is 30 ~ 110mm, and width is 5 ~ 8mm, and thickness is 0.3 ~ 0.8mm.
7. the assemble method of the baried type deformation gauge of the ultralow elasticity modulus as described in claim 1 ~ 6 any one claim, comprises the following steps:
1) by smooth for surface finish upper and lower in the middle part of elastic steel sheet, and with dipping in the cotton balls wiping of acetone;
2) paste 4 pieces of resistance strain gages in two protruding junction upper and lower surfaces of elastic steel sheet, and 4 pieces of resistance strain gages are connected into full-bridge, respectively insulation processing is carried out to strain label line;
3) on fixed bearing platform elastic steel sheet being fixed on deformation gauge end by socket head cap screw and elastomeric pad and movable cushion cap, this operation steps should guarantee elastic steel sheet longitudinal axis level and with two ends cushion cap axis collinear;
4) by step 3) subassembly that comprises elastic steel sheet and end cushion cap penetrates in copper pipe from right-hand member, copper pipe left end and fixed bearing platform firm welding; Wherein, penetrate in process, avoid elastic steel sheet generation excessive deformation;
5) shaft coupling is inserted copper pipe right-hand member, the left end of shaft coupling welds with copper pipe, and keeps coaxial position; The right-hand member of shaft coupling is fixed by the movable cushion cap of sunk screw and deformation gauge right-hand member;
6) screw in end flange from movable cushion cap right-hand member, flange imposes with shaft coupling contact position and welds;
7) gum sleeve of thermal shrinkage type is enclosed within copper pipe lateral surface, make it to shrink with heat gun heating and fit with deformation gauge surface, whole deformation gauge makes complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510149904.5A CN104848779A (en) | 2015-04-01 | 2015-04-01 | Embedded type deformation gauge with ultralow elastic modulus and method for assembling the embedded type deformation gauge with ultralow elastic modulus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510149904.5A CN104848779A (en) | 2015-04-01 | 2015-04-01 | Embedded type deformation gauge with ultralow elastic modulus and method for assembling the embedded type deformation gauge with ultralow elastic modulus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104848779A true CN104848779A (en) | 2015-08-19 |
Family
ID=53848609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510149904.5A Pending CN104848779A (en) | 2015-04-01 | 2015-04-01 | Embedded type deformation gauge with ultralow elastic modulus and method for assembling the embedded type deformation gauge with ultralow elastic modulus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104848779A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560534A (en) * | 2017-09-04 | 2018-01-09 | 东华大学 | Wireless movement monitoring system and method based on 3D printing Yu crooked sensory technology |
| CN108204784A (en) * | 2018-01-05 | 2018-06-26 | 东华大学 | Displacement sensing system and method based on 3D printing and Flex sensing technologies |
| CN108755784A (en) * | 2018-05-29 | 2018-11-06 | 东华大学 | System and method is monitored in conjunction with the pile body shifting that 3D printing and wireless Flex sense |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0814812A (en) * | 1994-07-01 | 1996-01-19 | Mitsubishi Heavy Ind Ltd | Sheet metal type high-temperature strain gauge |
| CN2235604Y (en) * | 1995-06-27 | 1996-09-18 | 司玉甫 | Card type microcomputerized tariff metering apparatus |
| CN1587892A (en) * | 2004-09-28 | 2005-03-02 | 长安大学 | Plane strain measurement sensor |
| CN201653351U (en) * | 2010-04-23 | 2010-11-24 | 戴靠山 | Concrete internal strain sensor |
| CN202903128U (en) * | 2012-11-01 | 2013-04-24 | 中冶建筑研究总院有限公司 | Strain measuring device for concrete structural body |
| CN203083520U (en) * | 2012-12-28 | 2013-07-24 | 浙江工业大学 | Embedded resistance strain gauge |
| CN204154269U (en) * | 2014-08-25 | 2015-02-11 | 广东粤盛特种建材有限公司 | A kind of anti-crack concrete embedded resistors formula strain testing meter |
| CN204594415U (en) * | 2015-03-30 | 2015-08-26 | 北方民族大学 | A kind of anti-interference cascade ladder corner reflector laser interferometer |
-
2015
- 2015-04-01 CN CN201510149904.5A patent/CN104848779A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0814812A (en) * | 1994-07-01 | 1996-01-19 | Mitsubishi Heavy Ind Ltd | Sheet metal type high-temperature strain gauge |
| CN2235604Y (en) * | 1995-06-27 | 1996-09-18 | 司玉甫 | Card type microcomputerized tariff metering apparatus |
| CN1587892A (en) * | 2004-09-28 | 2005-03-02 | 长安大学 | Plane strain measurement sensor |
| CN201653351U (en) * | 2010-04-23 | 2010-11-24 | 戴靠山 | Concrete internal strain sensor |
| CN202903128U (en) * | 2012-11-01 | 2013-04-24 | 中冶建筑研究总院有限公司 | Strain measuring device for concrete structural body |
| CN203083520U (en) * | 2012-12-28 | 2013-07-24 | 浙江工业大学 | Embedded resistance strain gauge |
| CN204154269U (en) * | 2014-08-25 | 2015-02-11 | 广东粤盛特种建材有限公司 | A kind of anti-crack concrete embedded resistors formula strain testing meter |
| CN204594415U (en) * | 2015-03-30 | 2015-08-26 | 北方民族大学 | A kind of anti-interference cascade ladder corner reflector laser interferometer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560534A (en) * | 2017-09-04 | 2018-01-09 | 东华大学 | Wireless movement monitoring system and method based on 3D printing Yu crooked sensory technology |
| CN108204784A (en) * | 2018-01-05 | 2018-06-26 | 东华大学 | Displacement sensing system and method based on 3D printing and Flex sensing technologies |
| CN108204784B (en) * | 2018-01-05 | 2020-04-17 | 东华大学 | Displacement sensing system and method based on 3D printing and Flex sensing technology |
| CN108755784A (en) * | 2018-05-29 | 2018-11-06 | 东华大学 | System and method is monitored in conjunction with the pile body shifting that 3D printing and wireless Flex sense |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103149094B (en) | The measuring method of tensile creep of early-age concrete | |
| CN207728372U (en) | A kind of duct pieces of shield tunnel interannular device for pressure measurement | |
| CN103821507B (en) | Shaft wall distortion distribution type fiber-optic detection method | |
| CN202903128U (en) | Strain measuring device for concrete structural body | |
| CN104122201A (en) | Device for measuring bond stress and slippage of reinforced concrete | |
| CN105258829A (en) | Underground engineering model test internal space stress measuring device and method | |
| CN104848779A (en) | Embedded type deformation gauge with ultralow elastic modulus and method for assembling the embedded type deformation gauge with ultralow elastic modulus | |
| CN203083520U (en) | Embedded resistance strain gauge | |
| CN206248252U (en) | A kind of anchor pole axial direction dynamometer | |
| CN204356818U (en) | The transmission of filling concrete pile load detects arc protective device | |
| CN104931176B (en) | A kind of piezoelectric type scroll chuck clamps force measuring device | |
| CN203908928U (en) | Reinforced concrete bond stress and slippage measuring device | |
| CN204730791U (en) | A kind of pick-up unit for cylinder class wall thickness | |
| CN204594414U (en) | The baried type deformation gauge of ultralow elasticity modulus | |
| CN113720510A (en) | Intelligent pipe jacking pipe circumference friction resistance measuring method based on film pressure sensor | |
| CN104048591A (en) | Carbon fiber yarn strain gage combination for measuring interior strain of early-stage concrete | |
| CN208606915U (en) | A kind of measuring device of steel tube component twin shaft residual stress | |
| CN103162877A (en) | Method of testing bolt load | |
| CN215338160U (en) | Device of detectable grout sleeve plumpness | |
| CN104374897A (en) | Method for determining early-stage concrete crack resistance by adopting elliptical ring test specimen | |
| CN204241029U (en) | Integrated pressure temperature measurement system | |
| CN204555894U (en) | A kind of transport pipeline internal diameter high speed detector | |
| CN210598993U (en) | Reinforced concrete segment joint pressure testing device in subway shield tunnel | |
| CN109115134B (en) | Hydraulic deformation test sensor | |
| CN202433131U (en) | Device for inspecting load of bolt |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150819 |
|
| RJ01 | Rejection of invention patent application after publication |